Paper Jams May 18, 2026 by zakaria

Konica Minolta bizhub — Paper Jam Code 10-01: Manual Bypass Tray Misfeed (Troubleshooting Guide)

Jam Code 10-01 is a Manual Bypass Tray (MPT) paper feed misfeed on Konica Minolta bizhub machines. It fires when the machine commands the bypass tray to feed a sheet of paper but the detection sensor — the registration sensor (PS1 / PS9) or the shared Tray 1 vertical transport sensor (PS4) depending on the model family — does not confirm the arrival of the paper leading edge within the allowed time window after the bypass feed cycle begins.

The manual bypass tray (MPT) is architecturally unlike any standard tray in the machine. It uses a flat, gravity-fed paper stack on a hinged platform, a spring-loaded or motor-driven lift plate that raises the stack to the pickup roller, a solenoid-actuated pickup mechanism that drops the roller onto the paper on demand, and a feed/separation roller pair that moves the sheet into the main paper path. Because so much of this mechanism is solenoid-based and operates on a short timed sequence — rather than through a continuously running clutch — the bypass tray is highly sensitive to rubber wear, solenoid response timing, and paper condition in ways that differ from the cassette tray family. Understanding this fundamental mechanical difference is what separates efficient 10-01 diagnosis from guesswork.

FieldDetails
Jam Code10-01
DescriptionMisfeed at manual bypass tray (MPT) feed section — the detection sensor is not activated within the allowed time after the bypass tray begins feeding paper
Jam LocationManual bypass tray — from the bypass pickup roller through the feed/separation roller pair to the first shared detection sensor in the main paper path
Detection Logic — PFTDB models (758/808/958/C659/C759/654e/754e):The leading edge of the paper does not turn ON the Tray 1 vertical transport sensor (PS4) even after the lapse of a given period of time after the manual bypass tray starts to feed paper
Detection Logic — BASEB models (C250i/C300i/C360i/250i/300i/360i):The registration sensor (PS1) is not turned ON (unblocked) even after the lapse of a given period of time after the manual bypass tray starts to feed paper
Detection Logic — MFPB + FRB models (C258/C308/C368/C458/C558/C658/368e/308e/458e/558e/658e):The leading edge of the paper is not turned ON the registration sensor/1 (PS1) even after the lapse of a given period of time after the manual bypass tray starts to feed paper
Detection Logic — MFPB models (C224/C284/C364/C224e/C284e/C364e/227/287/367):The leading edge of the paper does not turn ON the registration sensor (PS1) even after the lapse of a given period of time after the manual bypass tray starts to feed paper
Key ComponentsBypass tray pickup roller, feed roller, separation roller/pad; bypass tray paper feed clutch (CL7); bypass tray lift-up solenoid (SD1); bypass tray pickup roller solenoid (SD6, on i-series); bypass paper feed motor (M27, on high-volume models); lift plate and lift plate spring/cam; registration sensor (PS1 / PS9); Tray 1 vertical transport sensor (PS4); bypass upper/lower limit sensors (PS35 / PS36, on 654e/754e/758/958); registration clutch (CL4); transport motor (M1); paper feed motor (M22 / M24); control board (BASEB / MFPB / FRB / EXCB / PFTDB)
SeverityHigh — bypass tray disabled; any print job routed through the MPT is halted until the root cause is resolved
Related Jam Codes10-02 (MPT loop forming failure — paper arrives too late for loop registration), 10-10 (MPT lift plate failure — upper or lower limit sensor not activated), 10-40 (MPT image write signal timeout), 11-01 (Tray 1 misfeed — shares the same detection sensor PS4/PS1 as some bypass paths), C0211 (Bypass tray up/down failure — lift mechanism error code)

All Affected Models and Exact Component References

The bypass tray architecture changes significantly across bizhub model generations. The detection sensor used, the clutch and solenoid designations, the presence or absence of a dedicated bypass motor, and the control board path are all model-family dependent. Always identify your model family before running any service mode check.

bizhub ModelsDetection SensorFeed ClutchLift SolenoidPickup SolenoidTransport MotorSensor Check SignalCL7 Check SignalSD1 Check SignalM1 Check SignalControl Board
bizhub C250i / C300i / C360i / 250i / 300i / 360iPS1 (registration sensor)CL7SD1SD6M1BASEB CN15E-9 (ON), Location: 4-CCheck code: 20, Multi code: 3, BASEB CN26EA-12 (ON), Location: 10-KCheck code: 23, Multi code: 3, BASEB CN26EA-9 (ON), Location: 10-KCheck code: 40, Multi code: 1, 4, 5, BASEB CN19EA-1 to 5, Location: 1-CBASEB
bizhub C458 / C558 / C658 / 458e / 558e / 658ePS1 (registration sensor/1), PS72 (registration sensor/2) on C658/558e/658eCL7SD1—M1, M22, M24 (658e)PS1: EXCB CN6-3 (ON), Location: 26-P; PS72: EXCB CN6-5 (ON), Location: 26-PCheck code: 20, Multi code: 3, MFPB CN19E-7 (ON), Location: 22-ICheck code: 23, Multi code: 3, MFPB CN19E-9 (ON), Location: 22-ICheck code: 40, Multi code: 1–4, MFPB CN14E-3 (REM), Location: 1-CMFPB + FRB + EXCB
bizhub 368e / 308ePS1 (registration sensor/1)CL7SD1—M1, M22FRB CN8-3 (ON), Location: 6-LCheck code: 20, Multi code: 3, MFPB CN19E-7 (ON)Check code: 23, Multi code: 3, MFPB CN19E-9 (ON)Check code: 40, Multi code: 1–4, MFPB CN8E-3 (REM), Location: 2-CMFPB + FRB
bizhub C258 / C308 / C368 / C227 / C287 / C367 / 227 / 287 / 367PS1 (registration sensor)CL7SD1—M1MFPB (refer to SM)MFPB (refer to SM)MFPB (refer to SM)MFPB (refer to SM)MFPB
bizhub C224e / C284e / C364e / C224 / C284 / C364PS1 (registration sensor)CL7SD1—M1PRCB or MFPB (refer to SM)PRCB or MFPB (refer to SM)PRCB or MFPB (refer to SM)PRCB or MFPB (refer to SM)PRCB / MFPB
bizhub C450i / C550i / C650i / 458i / 558i / 658iPS1 (registration sensor)CL7SD1—M1, M22, M24Refer to service manualRefer to service manualRefer to service manualRefer to service manualMFPB + EXCB + FRB + BASEB
bizhub C659 / C759PS4 (Tray 1 vertical transport sensor)———M27 (bypass paper feed motor)PFTDB CN14-8 (ON), Location: 1-P——M27: Check code: 28, Multi code: 1–4, PFTDB CN9-3 to 6, Location: 12-PPFTDB + MFPB
bizhub 758 / 808 / 958 / PRO 958PS4 (Tray 1 vertical transport sensor)———M27 (bypass paper feed motor)PFTDB CN14-8 (ON), Location: 1-P——M27: PFTDB CN9-3 to 6, Location: 12-PPFTDB + MFPB
bizhub 654e / 754ePS4 (Tray 1 VT sensor), PS35 (bypass upper limit), PS36 (bypass lower limit)———M27 (bypass paper feed motor)PS4: PFTDB CN15-8 (ON); PS35: PFTDB CN9-10 (ON); PS36: PFTDB CN8-11 (ON)——M27: PFTDB CN9-1 to 4, Location: 12-PPFTDB + MFPB (or PRCB)
bizhub 223 / 283 / 363 / 423 / C454 / C554PS1 (registration sensor)CL7SD1—M1PRCB (refer to SM)PRCB (refer to SM)PRCB (refer to SM)PRCB (refer to SM)PRCB

ℹ️ Architecture note — CL7 + SD1 vs M27: Bizhub models in the BASEB, MFPB, FRB, PRCB families use a clutch-and-solenoid architecture for the bypass tray: the bypass paper feed clutch (CL7) engages the shared transport motor drive to the bypass feed rollers, and the bypass lift-up solenoid (SD1) actuates the lift plate mechanism that raises the paper to the pickup roller. On i-series models, an additional bypass pickup roller solenoid (SD6) independently drops the pickup roller onto the paper. High-volume models (758/808/958/654e/754e/C659/C759) use a dedicated bypass paper feed motor (M27) that independently drives both the lift mechanism and the feed rollers. Both architectures use different service mode check codes and connector paths — verify which applies to your model before running any test.

What Does Jam Code 10-01 Mean?

The manual bypass tray feeds paper through a fundamentally different mechanism than any of the cassette trays. Cassette trays use a continuously rotating motor with clutches that engage and disengage to transmit drive to the feed rollers. The bypass tray instead uses a sequence of timed electromechanical events that must occur in the correct order and within the correct time windows. Understanding this timed sequence is essential for efficient 10-01 diagnosis.

The bypass tray feed sequence works as follows on CL7 / SD1 architecture models:

  1. Paper is placed flat on the bypass tray platform. The machine detects paper is present via a bypass tray paper set sensor (PS7 or equivalent)
  2. When a print job is commanded from the bypass tray, the control board energizes the bypass lift-up solenoid (SD1), which actuates the lift plate mechanism, raising the paper stack upward until the top sheet contacts the bypass pickup roller
  3. On i-series models (C250i/C360i), the bypass pickup roller solenoid (SD6) is then energized to actively press the pickup roller down onto the paper with additional force — these models use SD1 for the plate lift and SD6 for the roller press as two separate actions
  4. The control board simultaneously energizes the bypass paper feed clutch (CL7), connecting the transport motor (M1) drive to the bypass feed rollers
  5. The pickup roller grips the top sheet and drives it forward into the bypass feed roller / separation roller nip. The separation roller prevents double-feeding
  6. The sheet travels through the bypass paper path and its leading edge activates the registration sensor (PS1 / PS9) or the Tray 1 vertical transport sensor (PS4) — the shared detection point where bypass paper merges into the main paper path. This sensor activation confirms a successful feed
  7. Jam Code 10-01 fires if the detection sensor is not activated within the allowed time from the start of the bypass feed cycle

On high-volume PFTDB models (758/808/958/654e/754e/C659/C759), the dedicated bypass paper feed motor (M27) replaces CL7 and SD1. M27 independently drives both the lift plate cam and the feed rollers — if M27 does not run, nothing in the bypass feed system operates.

Six distinct failure scenarios produce 10-01, each requiring a different diagnostic path:

  • Scenario A — Worn or glazed bypass pickup roller, feed roller, or separation roller/pad: The rubber on the pickup roller has hardened, glazed, or worn to a smaller diameter. The roller contacts the paper but cannot generate enough friction to reliably move it forward, particularly on smooth paper stocks. The separation roller retard pad (or rubber separation roller) may also be worn — too little retard force causes double-feeds, while a retard pad that has collapsed onto the feed roller with excessive drag prevents the sheet from moving forward at all
  • Scenario B — Bypass lift-up solenoid (SD1) not actuating: SD1 is the solenoid that raises the bypass tray lift plate to bring the paper stack into contact with the pickup roller. If SD1 does not energize, the lift plate never rises, the pickup roller never contacts the paper, and 10-01 fires because the feed attempt produces no paper movement at all
  • Scenario C — Bypass pickup roller solenoid (SD6) not actuating (i-series models): On bizhub C250i, C300i, and C360i, SD6 is the solenoid that independently presses the pickup roller down onto the paper after the lift plate has raised. If SD6 does not actuate, the pickup roller remains in the raised (home) position and cannot contact the paper stack even when it is correctly presented by SD1. 10-01 fires with no paper movement. This failure mode is unique to i-series bypass architecture and has no equivalent on other model families
  • Scenario D — Bypass paper feed clutch (CL7) not engaging: CL7 connects the transport motor M1 drive to the bypass feed rollers. If CL7 does not engage — because the coil has failed or no drive signal is reaching it from the board — the feed rollers receive no rotation even when the lift plate and pickup roller are functioning correctly. Paper may be presented to the pickup roller but cannot be driven forward
  • Scenario E — Bypass paper feed motor (M27) not running (PFTDB models): On high-volume models using M27, this motor drives the entire bypass mechanism. If M27 does not run, both the lift plate and the feed rollers are static. Nothing in the bypass feed system operates, and 10-01 fires immediately. A failed M27, a blown PFTDB fuse (F11 or F13), or a disconnected M27 harness all produce this scenario
  • Scenario F — Registration sensor (PS1) or Tray 1 VT sensor (PS4) failure: Paper is feeding correctly through the bypass path but the shared detection sensor has failed, its actuator flag is bent or obstructed, or a paper fragment from a previous jam is lodged in the sensor beam. The machine never receives confirmation of paper arrival and fires 10-01 on a timeout even though paper has successfully entered the main paper path

Step 1 — Clear the Paper and Check the Stopped Position

Unlike tray misfeeds, the bypass tray paper stopping position is less diagnostic because the bypass path is short — but it still distinguishes between a no-movement failure (Scenarios B, C, D, or E) and a partial-feed failure where paper started moving but stopped before reaching the sensor (Scenario A).

  1. Open the right-side cover or front door as directed by the panel to access the bypass paper path and the main paper path entry point
  2. Remove any jammed paper carefully, always pulling in the direction of paper travel
  3. Also check inside the bypass tray platform surface and behind the feed roller area for torn paper fragments — bypasses are particularly prone to leaving small fragments at the separation roller interface
  4. Observe where the paper stopped:
    • Paper did not move from the bypass tray at all: Scenarios B, C, D, or E — the lift plate did not rise, the pickup roller did not contact the paper, or no drive reached the feed rollers. Proceed to Steps 4–7 for solenoid and clutch/motor checks
    • Paper moved slightly from the bypass tray but stopped before or at the feed/separation roller: Scenario A — pickup roller moved the paper forward but the feed roller has insufficient grip, or the separation retard pad is providing excessive drag. Proceed to Step 2 for roller inspection
    • Paper entered the machine past the separation roller but stopped before reaching the detection sensor: Scenario A — feed roller is glazed, or the registration clutch (CL4) did not engage to receive the paper. Also check CL4 in service mode (Step 8)
    • Paper appears to have reached the sensor area but 10-01 still fired: Scenario F — registration sensor (PS1) or VT sensor (PS4) has failed. Proceed to Step 9 for sensor checks
  5. Inspect the stopped paper for damage patterns:
    • Leading edge crumpled against the feed roller nip: Pickup roller pushed paper but separation retard pad is creating excessive drag, preventing forward movement
    • Paper has entered slightly but shows lateral skew: Bypass tray paper guides are not adjusted correctly to the paper width
    • Multiple sheets came out simultaneously: Separation retard pad is worn out — replace the pad and inspect the feed roller surface

Step 2 — Inspect and Clean the Bypass Tray Pickup Roller, Feed Roller, and Separation Roller/Pad

The bypass tray roller system is the most common mechanical cause of 10-01 across all bizhub model families. Unlike cassette trays, the bypass tray often runs a wide variety of paper stocks — heavy card, labels, transparencies, letterhead — that accelerate rubber wear and glazing faster than standard copy paper.

  1. Open the bypass tray fully to access the pickup roller — it is mounted on a swinging arm or drop-down bracket above the tray surface. The rubber surface should be textured and dark-coloured. A shiny, flat, cracked, or hollow-worn surface needs replacement
  2. Access the bypass feed assembly — on most bizhub models the bypass feed roller and separation roller (or retard pad) are accessible by pulling out the bypass feed unit from the right side of the machine or by removing the small access panel above the bypass opening. Refer to the model service manual for the specific access procedure
  3. Inspect:
    • Feed roller: Same rubber surface check as pickup roller — textured and firm, not glazed or flat-spotted
    • Separation roller or retard pad:
      • If the model uses a rubber separation roller: manually rotate it — it should turn in the feed direction with light resistance and resist turning against the feed direction. A separation roller that spins freely in both directions means the torque limiter has failed — replace the separation roller assembly
      • If the model uses a retard pad (a friction pad pressed against the feed roller from below): inspect the pad surface for glazing, hollowing, or cracking. A pad worn flat or compressed past its service limit does not create enough retard force to stop double-feeds, or creates too much drag if the pad has collapsed onto the roller
  4. Clean all rubber roller surfaces with a damp lint-free cloth — never use IPA or chemical solvents on feed rubber. On heavily glazed rollers, a damp cloth with a very small amount of mild dish soap (no alcohol or petroleum derivatives) can restore surface texture temporarily, but replacement is the correct long-term fix for a glazed roller
  5. If the pickup roller or feed roller is glazed, cracked, or flat-spotted, replace both together — never replace a single roller from a worn pair. On most bizhub models the bypass roller kit includes the pickup roller, feed roller, and separation roller/pad as a set

ℹ️ Bypass tray roller note — one-way clutch bearings: Unlike cassette tray feed rollers on most bizhub models, the bypass tray pickup roller on the CL7/SD1 architecture is typically not driven through a one-way clutch bearing — the roller drop mechanism (SD1 or SD6) controls when the roller contacts the paper, and CL7 provides the drive continuously when energized. However, on some PFTDB-equipped models (654e/754e), a one-way clutch is present on the bypass feed roller shaft. On these models, inspect the shaft surface under the bearing and replace the one-way clutch along with the roller if the shaft is mirror-polished. Refer to the model-specific service manual to confirm whether a one-way clutch is present on the bypass feed assembly for the specific machine being serviced.

Step 3 — Inspect the Bypass Tray Lift Plate Mechanism

The lift plate is the spring-loaded or cam-actuated platform that raises the paper stack to contact height when SD1 or M27 is activated. Mechanical problems with the lift plate mechanism are a significant cause of 10-01 and are often overlooked when the roller surfaces appear clean.

  1. With the bypass tray open and the machine powered off, manually push the bypass lift plate down and release it — it should spring upward smoothly and fully to the raised (paper contact) position. If it moves stiffly, catches at a point, or does not spring up fully, the cam, spring, or lift plate pivot is mechanically binding
  2. Inspect the lift plate pivot arms and any visible cam surface for:
    • Broken or detached lift spring — the most common mechanical cause of lift plate failure. A spring that has popped off its mounting post produces a plate that sits permanently in the lowered position, resulting in the pickup roller never contacting the paper
    • Cracked or worn cam profile — on models where SD1 drives a cam to raise the plate, a worn cam does not complete the full lift stroke, leaving the plate too low for reliable pickup roller contact
    • Foreign objects (paper clips, staples, folded paper) lodged under the lift plate, preventing it from rising fully
  3. On 654e/754e models with lift plate position sensors (PS35/PS36): observe in service mode whether PS35 (bypass upper limit sensor, Signal: PFTDB CN9-10 or CN15-8 depending on model generation) activates when the plate is raised manually. If PS35 does not activate when the plate is fully raised, the plate is not reaching the correct height — inspect the lift spring and cam. If PS35 activates but 10-01 still fires during a powered feed cycle, the lift mechanism is functioning but the pickup roller is not contacting the paper — check the roller surface and SD1 / M27 operation
  4. Reseat or replace any detached spring. If the cam is worn or the lift arm is cracked, the bypass feed assembly requires replacement as a unit on most models

Step 4 — Check the Bypass Lift-Up Solenoid (SD1) in Service Mode

The bypass lift-up solenoid (SD1) is the electromagnetic solenoid that physically actuates the bypass tray lift plate mechanism when the machine begins a bypass feed cycle. If SD1 does not energize, the lift plate never rises and the pickup roller never contacts the paper — 10-01 fires immediately with no paper movement from the bypass tray.

  1. Enter Service Mode (refer to model-specific service manual for access procedure)
  2. Navigate to the load / solenoid operation check section
  3. Command SD1 to energize using the model-specific check signal:
    • C250i / C300i / C360i (BASEB): Check code: 23, Multi code: 3, Signal: BASEB CN26EA-9 (ON), Location: 10-K
    • C458 / C558 / C658 / 458e / 558e / 658e (MFPB + FRB): Check code: 23, Multi code: 3, Signal: MFPB CN19E-9 (ON), Location: 22-I
    • 368e / 308e (MFPB + FRB): Check code: 23, Multi code: 3, Signal: MFPB CN19E-9 (ON)
    • All other MFPB / PRCB models: Refer to model-specific service manual for SD1 check signal
  4. Listen for SD1 clicking and actuating when commanded — you should hear a distinct mechanical snap and see the lift plate rise if the bypass tray is open
  5. Interpret:
    • SD1 clicks and the lift plate rises correctly: The solenoid and its drive circuit are functional. If 10-01 still occurs, the fault is in the roller, CL7, the sensor, or CL4. Proceed to Steps 5–9
    • SD1 clicks but the lift plate does not rise: The solenoid is energizing but the mechanical coupling between SD1 and the lift plate arm has failed — inspect the SD1 plunger-to-plate linkage for a broken cotter pin, detached link arm, or worn pivot hole
    • SD1 does not click and no plate movement occurs: The solenoid coil has failed or no drive signal is reaching it from the board. Check the connector between SD1 and the control board for proper seating. Test SD1 coil continuity with a multimeter — open circuit (infinite resistance) confirms a failed solenoid coil. Replace SD1

Step 5 — Check the Bypass Pickup Roller Solenoid (SD6) in Service Mode — i-Series Models Only

This step applies exclusively to the bizhub C250i, C300i, and C360i (and their monochrome equivalents 250i/300i/360i). These models add a second solenoid (SD6) that independently presses the pickup roller down onto the paper stack after SD1 has raised the lift plate. If SD6 does not actuate, the pickup roller remains in the raised home position and cannot contact the paper regardless of how well SD1 and CL7 are working.

  1. In Service Mode, navigate to the solenoid operation check section
  2. Command SD6 to energize: Check code: 23, Multi code: 3, Signal: BASEB CN26EA-7 (ON), Location: 10-K
  3. With the bypass tray open, observe the pickup roller arm when SD6 is commanded — it should visibly drop downward toward the tray surface, simulating the roller press-down motion that occurs during a feed cycle
  4. If SD6 does not actuate: check the connector between SD6 and BASEB CN26EA. Test SD6 coil continuity — replace SD6 if open-circuit
  5. After confirming SD6 operates correctly, also confirm that the pickup roller arm movement from SD6 actuation is full and smooth — a pickup roller arm that is sticky or does not fully extend may contact the paper weakly, producing intermittent 10-01 on thinner stock

Step 6 — Check the Bypass Paper Feed Clutch (CL7) in Service Mode

The bypass paper feed clutch (CL7) connects the transport motor M1 drive to the bypass feed rollers on all CL7/SD1 architecture models. If CL7 does not engage, the feed rollers receive no rotation and paper presented by SD1 to the pickup roller cannot be driven forward into the machine. This failure produces 10-01 even when the lift plate rises correctly and the pickup roller contacts the paper.

  1. In Service Mode, navigate to the load / clutch operation check section
  2. Command CL7 to engage using the model-specific check signal:
    • C250i / C300i / C360i (BASEB): Check code: 20, Multi code: 3, Signal: BASEB CN26EA-12 (ON), Location: 10-K
    • C458 / C558 / C658 / 458e / 558e / 658e (MFPB + FRB): Check code: 20, Multi code: 3, Signal: MFPB CN19E-7 (ON), Location: 22-I
    • 368e / 308e (MFPB + FRB): Check code: 20, Multi code: 3, Signal: MFPB CN19E-7 (ON)
    • All other MFPB / PRCB models: Refer to model-specific service manual for CL7 check signal and connector location
  3. Listen for CL7 clicking and engaging when commanded. With the bypass tray open, manually attempt to rotate the bypass feed roller shaft — it should lock when CL7 is energized and spin freely when de-energized
  4. Interpret:
    • CL7 clicks and engages correctly: The clutch is functional. The fault is mechanical (roller surfaces, SD1, SD6, or sensor). Continue to Step 7 or Step 9
    • CL7 does not engage and no click is heard: Check the connector between CL7 and the board. Test CL7 coil continuity — open circuit confirms a failed clutch coil. Replace CL7

Step 7 — Check the Bypass Paper Feed Motor (M27) in Service Mode — PFTDB Models

This step applies to bizhub 758/808/958/PRO 958, 654e/754e, C659, and C759 — all models that use a dedicated bypass paper feed motor (M27) instead of the CL7/SD1 clutch-and-solenoid architecture. On these models, M27 drives both the bypass tray lift plate cam and the bypass feed rollers. If M27 does not run, nothing in the bypass feed system moves, and 10-01 fires immediately.

  1. In Service Mode, navigate to the motor load check section
  2. Command M27 to run using the model-specific check signal:
    • 654e / 754e: Signal: PFTDB CN9-1 to 4, Location: 12-P
    • 758 / 808 / 958 / C659 / C759: Signal: PFTDB CN9-3 to 6, Check code: 28, Multi code: 1–4, Location: 12-P
  3. Listen for M27 running. With the bypass tray open, the lift plate cam should visibly rotate and the feed rollers should turn when M27 is commanded. Listen for any unusual noise — grinding, hesitation, or irregular speed indicates a failing M27 bearing or a mechanical bind in the bypass assembly
  4. Interpret:
    • M27 runs smoothly and the lift plate cam rotates: The motor and its drive circuit are functional. The fault is in the bypass roller surfaces, a bypass path obstruction, or the detection sensor (PS4 or PS35/PS36). Proceed to Steps 2 and 9
    • M27 runs but the cam does not rotate: The mechanical coupling between M27 and the cam/roller shaft has failed — inspect the gear train on the bypass feed assembly for stripped teeth or a failed coupling
    • M27 does not run: Check the connector between M27 and PFTDB CN9. Check PFTDB fuses F11 and F13 for continuity — a blown fuse is a cheaper resolution than motor or board replacement and should always be checked before replacing components. If fuses are intact, test M27 winding resistance and replace M27 if the winding is open-circuit or has abnormally high resistance

ℹ️ PFTDB fuse check sequence for M27 failure: On 654e/754e and 758/808/958/C659/C759, the PFTDB has multiple fuses protecting different motor circuits. When M27 does not run: check PFTDB F11 and F13 for continuity before condemning M27 or the PFTDB. A fuse that has blown due to a previous M27 overcurrent event (caused by a bypass tray jam that stalled the motor) is the most common reason M27 appears dead in service mode. Fitting a replacement fuse is a valid repair only if the root cause of the overcurrent (the stall) has been identified and resolved — fitting a new fuse without clearing the mechanical stall cause will blow the replacement fuse immediately.

Step 8 — Check the Registration Clutch (CL4) and Transport Motor (M1) in Service Mode

After bypass paper exits the bypass feed section, it must be received by the registration roller in the main paper path. The registration clutch (CL4) controls the drive to the registration roller, which accepts the paper from the bypass path and holds it momentarily to straighten the leading edge before passing it through the machine. A failed CL4 causes bypass paper to stall just at or after the registration sensor position, producing a 10-01 that appears to be a bypass feed failure but is actually a registration-stage fault.

  1. In Service Mode, navigate to the clutch operation check section
  2. Command CL4 (registration clutch) to engage using the model-specific check signal:
    • C250i / C300i / C360i (BASEB): Check code: 21, Multi code: 2, Signal: BASEB CN15E-2 (ON), Location: 3-C
    • C458 / C558 / C658 / 458e / 558e / 658e (FRB): Check code: 21, Multi code: 2, Signal: FRB CN8-7 (CL4_REM), Location: 4-K
    • 368e / 308e (FRB): Check code: 21, Multi code: 2, Signal: FRB CN8-7 (CL4_24V), Location: 5-L
    • All other MFPB / PRCB models: Refer to model-specific service manual for CL4 check signal
  3. Listen for CL4 clicking and engaging. The registration roller shaft should lock when CL4 is energized
  4. If CL4 does not engage: check the connector seating and test coil continuity. Replace CL4 if open-circuit
  5. Also run the transport motor M1 load check to confirm M1 is running at correct speed. A transport motor running at reduced speed delivers bypass paper late to the registration sensor, producing 10-01 even when the bypass feed mechanism itself is functioning correctly:
    • C250i / C300i / C360i (BASEB): Check code: 40, Multi code: 1, 4, 5, Signal: BASEB CN19EA-1 to 5, Location: 1-C
    • C458 / C558 / C658 / 458e / 558e / 658e: Check code: 40, Multi code: 1–4, Signal: MFPB CN14E-3 (REM), Location: 1-C
    • 368e / 308e: Check code: 40, Multi code: 1–4, Signal: MFPB CN8E-3 (REM), Location: 2-C
  6. Listen for any abnormal motor noise during the M1 load check — grinding, hesitation, or irregular speed indicates a failing motor bearing or a mechanical obstruction in the main transport drive path

Step 9 — Check the Registration Sensor (PS1) or Tray 1 VT Sensor (PS4) in Service Mode

If all mechanical components — rollers, SD1, SD6, CL7, M27, CL4, and M1 — are confirmed operational, but 10-01 still fires, the shared detection sensor may have failed. This sensor is the only confirmation point that bypass paper has successfully entered the main paper path, and a sensor stuck in the OFF state (not detecting paper) produces 10-01 on every bypass print cycle.

  1. In Service Mode, navigate to the sensor I/O check section
  2. Monitor the registration sensor (PS1 or PS9) or Tray 1 vertical transport sensor (PS4) at the connector pin shown in the model reference table above
  3. With no paper in the bypass path or main paper path entry point: the sensor should read OFF (unblocked)
  4. Slowly feed a sheet of paper by hand into the bypass tray opening and advance it until the leading edge reaches the sensor position:
    • The sensor should switch to ON as the paper leading edge crosses the beam
    • The sensor should return to OFF when the paper trailing edge passes
  5. Also check whether the bypass tray sensor path merges with the Tray 1 transport path before the detection point — on models where bypass and Tray 1 share sensor PS1, a paper fragment lodged in the sensor from a previous Tray 1 jam can produce 10-01 even though the bypass mechanism is working correctly
  6. Interpret:
    • Sensor switches correctly when paper is manually positioned: The sensor is functional. The powered bypass feed cycle is not delivering paper to the sensor position — the fault is mechanical (rollers, SD1, SD6, CL7, or M27)
    • Sensor reads ON permanently with no paper present: Inspect the sensor beam slot for paper debris. A torn fragment from a previous jam lodged in the slot is the most common cause. If the slot is clear, inspect the sensor actuator flag. If the flag and slot are both clear, the sensor has failed in the blocked state — replace the sensor
    • Sensor does not switch ON when paper is manually positioned across the beam: Inspect the sensor actuator flag — if bent, broken, or missing, replace it before replacing the sensor. If the flag is intact and the sensor still does not respond, replace PS1 or PS4

Step 10 — Check Paper Loading and Bypass Tray Condition

Paper loading and stock condition issues are a disproportionately common cause of 10-01 compared to other tray misfeeds — because the bypass tray is used for special media (heavy stock, labels, envelopes, letterhead) that is inherently more challenging to feed reliably than standard copy paper. Always confirm paper condition before concluding a mechanical fault.

  1. Remove all paper from the bypass tray and inspect the paper itself:
    • Paper is curled: Curled paper lifts the leading edge away from the tray surface, preventing it from entering the feed nip correctly. Reverse-curl the paper stack before loading, or switch to a fresh ream. Curled paper is the most common environmental cause of 10-01
    • Paper weight is outside specification: The bypass tray supports the widest paper weight range on bizhub machines (typically 52–300 g/m² depending on model), but heavy card above approximately 220 g/m² requires a reduced stack height and specific paper settings. Confirm the paper weight and the paper type setting in the bypass tray settings match the actual media being used
    • Paper is damp or humidity-affected: Sheets from an improperly stored ream can stick together or swell at the edges. Fan the stack thoroughly and use fresh paper from a sealed ream
    • Paper is too smooth or coated: Highly coated papers (gloss coated, cast-coated) can slip on a glazed pickup roller. Clean the pickup roller thoroughly with a damp cloth before concluding the roller needs replacement
  2. Confirm the bypass tray paper width guides are correctly adjusted to lightly contact the paper edges. Over-tight guides cause lateral friction and skewing that prevents clean entry into the feed nip
  3. Confirm the paper stack height does not exceed the maximum fill mark on the bypass tray — overloaded bypass trays compress the stack and prevent the lift plate from raising the top sheet to the correct pickup height. The maximum is typically 20–50 sheets depending on paper weight
  4. Fan the paper stack, reload with a reduced stack, and attempt a 10-page test print from the bypass tray. If 10-01 does not recur, paper condition or overloading was the cause

Step 11 — Replace the Control Board (Last Resort)

If all mechanical components are confirmed functional in service mode (SD1 clicks, SD6 clicks on i-series, CL7 engages or M27 runs, CL4 engages, M1 runs at correct speed), the detection sensor switches correctly, paper condition is confirmed good, and 10-01 still fires consistently from the bypass tray, the fault is in the control board’s output driver for SD1, SD6, CL7, or its sensor input circuit for PS1/PS4.

  • Replace BASEB — bizhub C250i/C300i/C360i, 250i/300i/360i
  • Replace FRB, then MFPB — bizhub C458/C558/C658, 458e/558e/658e, 368e/308e (try FRB before MFPB — FRB carries the CL4 and CL7 control signals on these models)
  • Replace MFPB — bizhub C258/C308/C368, C224e/C284e/C364e, 227/287/367
  • Replace PRCB or MFPB — bizhub C224/C284/C364, 223/283/363/423, C454/C554 (refer to SM for board order)
  • Replace PFTDB, then MFPB — bizhub 758/808/958/PRO 958, 654e/754e, C659/C759 (always try PFTDB before MFPB for isolated bypass codes on these models)
  • Replace EXCB, then MFPB — bizhub C450i/C550i/C650i, 458i/558i/658i (EXCB carries sensor signal routing for PS1/PS72 on these models)

Quick Reference — Troubleshooting by Symptom

SymptomMost Likely CauseFirst Action
10-01 on every bypass print, paper does not move at all from the bypass traySD1 not actuating (lift plate not rising) or CL7 not engaging, or M27 not running on PFTDB modelsCommand SD1 in service mode — if no click, check connector and coil continuity; command CL7 — if no click, check connector and coil; on PFTDB models, check M27 and PFTDB fuses F11/F13
10-01 on every bypass print, lift plate rises but paper does not move into machineCL7 not engaging, or pickup roller not contacting paper (SD6 not actuating on i-series), or severely glazed pickup rollerOn i-series, command SD6 first; then command CL7; inspect pickup roller surface — clean or replace
10-01 intermittently — bypass works most of the time but fails 1 in every 10–30 pagesGlazed or worn bypass pickup roller or feed roller; marginally working SD1 solenoidClean bypass rollers with damp cloth; inspect pickup roller surface; command SD1 in service mode to confirm full actuation stroke
10-01 only on heavy card or special media from bypassPickup roller glazed — insufficient grip on heavier stock; or paper weight exceeds tray specification for current stack heightClean pickup roller; reduce paper stack to 10–15 sheets for heavy stock; confirm paper weight matches tray setting
10-01 only on smooth or highly coated paper from bypassPickup roller glazed — coated paper demands maximum surface textureClean pickup roller thoroughly with damp cloth; replace if glazed beyond what cleaning restores
Multiple sheets feeding simultaneously from bypass tray (double-feed) leading to 10-01Separation retard pad worn flat — retard function lostReplace separation retard pad or separation roller assembly; check feed roller surface simultaneously
10-01 with paper curling back on itself at bypass tray entryPaper is heavily curl-set; or bypass tray guide arms are not aligned for the paper widthReverse-curl or flatten the paper stack before reloading; adjust bypass width guides to lightly contact paper edges
10-01 on bypass, lift plate visible not rising during print cycleSD1 coil failed or lift plate spring detached from mounting postCommand SD1 in service mode — if click heard but plate does not rise, inspect SD1-to-plate linkage and lift spring; if no click, replace SD1
10-01 on bypass with registration sensor (PS1) reading ON permanently in service modePaper fragment lodged in PS1 beam from a previous Tray 1 or bypass jam; or PS1 failed in blocked stateInspect PS1 sensor slot for paper debris and clear; if clear and actuator flag is intact, replace PS1
10-01 on bypass and 11-01 on Tray 1 simultaneouslyShared detection sensor (PS1 or PS4) failed — neither bypass nor Tray 1 paper activates the common sensorCheck PS1 or PS4 I/O in service mode; inspect sensor slot for paper debris; replace sensor if no response to manual paper actuation
10-01 on bypass after confirming all mechanical components work in service modeFRB (on C458/C558/C658/368e/308e series) or BASEB (i-series) or PFTDB (PFTDB models) board-level output faultReplace FRB before MFPB on FRB-equipped models; replace BASEB on i-series; replace PFTDB before MFPB on PFTDB models

Understanding the 10-xx Bypass Tray Jam Code Family

Jam Code 10-01 is the primary member of the manual bypass tray misfeed family. Understanding the complete family and the relationships between codes allows correct interpretation when multiple codes appear or when the 10-01 is accompanied by a related error:

  • 10-01 — Bypass tray primary misfeed — paper leading edge did not reach the detection sensor (PS1 or PS4) within the allowed time after bypass feeding began. Primary bypass no-feed code. This article
  • 10-02 — Bypass tray loop forming failure — paper from the bypass tray arrived late at the registration roller and the deliberate paper loop (buckle) used to straighten the leading edge was not formed before the machine’s registration timing window. The same components as 10-01 are involved, but the paper actually moved and reached the sensor area — it simply arrived too late for correct loop formation. Marginal feed roller performance, a CL7 that engages slowly, or an M27 running below rated speed all produce 10-02 from the same components that cause 10-01 when they fail more severely
  • 10-10 — Bypass tray lift plate failure — specifically on models with lift plate position sensors (PS35/PS36 on 654e/754e): the bypass upper limit sensor (PS35) is not activated after M27 begins the lift cycle, or the bypass lower limit sensor (PS36) is not activated after feeding is complete. 10-10 is the lift-plate-specific sub-code that accompanies 10-01 on the 654e/754e platform when the lift mechanism cannot complete its stroke. It directly confirms Scenario B (lift mechanism failure) without needing a separate sensor I/O check
  • 10-40 — Bypass tray image write signal timeout — the image write start signal permit remained disabled for longer than allowed after expected output timing. This is a higher-level control error that typically indicates a board communication fault rather than a mechanical paper path failure. When 10-40 appears without 10-01, the bypass paper path is functioning correctly but the board-level synchronization between the paper feed timing and the image write engine is broken. 10-40 in isolation points to the PFTDB (PFTDB models), FRB (FRB models), or MFPB as the likely fault. When 10-40 accompanies 10-01, the 10-01 root cause is the primary fault — address 10-01 first and confirm whether 10-40 clears simultaneously
  • C0211 — Bypass tray up/down failure error code — the bypass lift plate position sensor (PS28 on some models, or equivalent) is not activated or deactivated within the allowed time during a powered lift cycle. This is an error code (not a jam code) that fires when the lift mechanism is mechanically bound or when SD1/M27 does not produce the expected plate movement. C0211 accompanying 10-01 definitively confirms Scenario B or E — the lift mechanism is failing and SD1 / M27 or the lift cam/spring requires attention

When 10-01 and 11-01 appear together and share the same detection sensor (PS1 on most models), the fault is almost certainly the shared sensor PS1 — not two simultaneous independent feed failures on both the bypass tray and Tray 1. Inspect PS1 for paper debris or failure before checking any mechanical component in either tray’s feed assembly.

Preventing Jam Code 10-01 From Recurring

  • Include the bypass tray pickup roller and separation pad/roller in every PM. The bypass tray rollers are not always included in standard PM kits because bypass tray usage varies widely between customers. But on high-use bypass machines — environments that regularly print on letterhead, heavy card, or envelopes through the bypass — the pickup roller glazes faster than the cassette tray rollers. Inspect and clean the bypass pickup roller at every PM visit, and replace it when glazing is evident rather than waiting for a callback call
  • Inspect and test the bypass lift plate spring at every PM. A 30-second manual check — push the lift plate down and confirm it springs up smoothly and fully — catches early spring fatigue before it causes a 10-01 service call. A spring that requires significant manual force to return or catches at midpoint is at end of service life
  • Advise customers on correct bypass tray paper loading practices. The majority of recurring 10-01 calls in office environments are caused by customers loading paper that is curled, exceeds the stack limit, or has the width guides too loose. A 2-minute user training session at each PM visit — covering stack height, guide adjustment, and paper condition — significantly reduces 10-01 occurrence between PM intervals
  • Clean the bypass paper path at every PM. Bypass paper often carries more paper dust, coating particles, and paper debris than cassette paper because it frequently handles special media. A quick wipe through the bypass path with a lint-free cloth at each PM removes the buildup that contributes to sensor beam obstruction and roller contamination
  • Check the bypass path for paper fragment obstruction after every bypass-area jam before clearing the error. Paper fragments lodged in the bypass feed section or in the PS1/PS4 sensor beam are a primary cause of persistent 10-01 after a jam is physically cleared. Inspect the bypass separator nip point and the sensor slot before powering on after a bypass jam
  • Run a 10-page bypass test with the same media type the customer uses after every PM. Intermittent 10-01 on coated stock that passes on standard copy paper will not be detected by a plain paper functional test. Use the same paper weight and type the customer loads in the bypass tray for the post-PM functional test

Professional Technician Summary

Jam Code 10-01 on Konica Minolta bizhub machines is a manual bypass tray misfeed, and it is architecturally distinct from all cassette tray misfeeds because the bypass tray relies on a timed solenoid-and-clutch sequence rather than a continuously running clutch-driven mechanism. This distinction is why 10-01 diagnosis focuses on solenoid actuation (SD1, SD6) and clutch engagement (CL7) before looking at roller condition — if the timed sequence of SD1 → SD6 → CL7 does not fire correctly, no amount of new roller rubber will make the bypass tray feed reliably.

In practice, the most common field causes of 10-01 are: a glazed bypass pickup roller (dominant cause on machines with high bypass usage, particularly on coated media); a bypass lift-up solenoid SD1 that is energizing but not completing the full lift stroke due to a detached plunger linkage or broken lift spring; and curled or improperly loaded paper from the customer’s side. These three causes account for the vast majority of 10-01 calls and are resolved without board replacement.

On i-series models (C250i/C300i/C360i), always check SD6 (the pickup roller press solenoid) as a separate step from SD1 — this second solenoid is unique to the i-series bypass architecture and its failure produces 10-01 even when SD1, CL7, and the rollers are all working correctly. Missing SD6 in the diagnostic sequence on these models is a common source of inconclusive bench tests.

On high-volume PFTDB models (758/808/958/654e/754e/C659/C759), check the PFTDB fuses F11 and F13 before replacing M27 when the motor does not respond in service mode. A blown fuse caused by a previous bypass jam stalling the motor is the correct cause when M27 is electrically intact but receives no power. Replace the fuse after confirming the bypass mechanism can turn freely by hand — fitting a new fuse into a mechanically jammed bypass will blow the replacement fuse immediately.

Board replacement is always the last resort for 10-01. On FRB-equipped models (C458/C558/C658/458e/558e/658e/368e/308e), replace the FRB before the MFPB when a board fault is suspected — the FRB carries the CL4 and CL7 control signals and PS1 sensor input on these models, making it the correct first board replacement for isolated bypass jam codes.