Oki OKIPAGE6w Troubleshooting Manual
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Oki OKIPAGE6w Troubleshooting Manual

Oki OKIPAGE6w Troubleshooting Manual

Led page printer
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Download this manual See also: Setup & Installation, User Manual
OKIPAGE6w
LED Page Printer
Troubleshooting Manual
with Component Parts List
(OEL)
All specifications are subject to change without notice.

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Summary of Contents for Oki OKIPAGE6w

  • Page 1 OKIPAGE6w LED Page Printer Troubleshooting Manual with Component Parts List (OEL) All specifications are subject to change without notice.

  • Page 2: Table Of Contents

    CONTENTS OUTLINE..................... 1 TOOLS ......................1 CIRCUIT DESCRIPTION ................2 Outline ........................2 CPU and Memory ....................4 Reset Control ......................6 EEPROM Control ..................... 7 Centronics Parallel Interface ..................8 Front Operator Panel ....................9 LED Head Control ....................10 Motor and clutch control ..................

  • Page 3: Outline

    OUTLINE This manual has been written to provide guidance for troubleshooting of the OKIPAGE6w Printer (primarily for its printed circuit boards), on an assumption that the reader is knowledgeable of the printer. Read the maintenance manual for this printer if necessary.

  • Page 4: Circuit Description

    CIRCUIT DESCRIPTION Outline The circuit of OKIPAGE6w consists of a main control board, a main high voltage power supply board,a syb-high voltage power supply board and a power supply unit. The block diagram is shown in Fig. 3-1. The main control board controls the reception and transmission of data with a host I/f and processes command analysis, bit image development, raster buffer read.
  • Page 5 DRAM Bus Internal 1M x 4 (Data : 4) MASK ROM (Address : 11) 62KB LS07 16MHz HC125 +26V CN10 High Voltage Power Unit High Voltage Power Unit Power Supply Unit ID Unit Figure 3-1 OKIPAGE6w Block Diagram - 3 -...

  • Page 6: Cpu And Memory

    CPU and Memory (1) CPU (MSM65917) CPU core nX-8 CPU clock 16 MHz Data bus width External 8 bits, Internal 8 bits (2) Program ROM ROM capacity 64k-bytes ROM type 512 kbits (64k x 8 bits) Access time 90 nsec (3) Resident RAM RAM capacity 512k bytes (1M x 4 bits D-RAM one piece)
  • Page 7 A08 to A15 EPROM ROCS (64k x 8 bits) DD00 to DD03 DA00 to DA09 IC11 DRAM DA10 (1M x 4 bits) RAS0 RAS1 RAS2 Main Control Board Figure 3-2 Block Diagram of CPU & Memory in OKIPAGE6w - 5 -...

  • Page 8: Reset Control

    Reset Control When power is turned on, RST-N signal is generated by IC5. RSTN Power ON Power OFF RST-N - 6 -...

  • Page 9: Eeprom Control

    EEPROM Control The BR93LC46A on the main control board is an electrical erasable/programmable ROM of 64- bit x 16-bit configuration. Data input to and output from the ROM are bidirectionally transferred in units of 16 bits through I/O port (EEPRMDT-P) in serial transmission synchronized with a clock signal from the CPU.

  • Page 10: Centronics Parallel Interface

    Parallel Interface Parallel data is received from a host system via parallel interface which is compliant to the IEEE1284 specification. 65 to 68, 71 to 74 DATA8-P PDATA1-P to PDATA8-P DATA1-P 2 to 9 PSTB-N STB-N BUSY-P BUSY-P ACK-N ACK-N PE-P PE-P SEL-P...

  • Page 11: Front Operator Panel

    LED Lamp Control There is an LED lamp on the high voltage power supply board which is connected to and controled by the CPU on the main control board. The light from the LED lamp can be seen on the Lens Cover through the LED Lens. main control board high voltage power supply board LED-P...

  • Page 12: Led Head Control

    LED Head Control An LED correcting head, which is capable of correcting the illumination of the LED for each dot, is being used in this printer. LED illumination correction function of 16 steps is carried out by using an EEPROM which is installed in the LSI that maintains the LED illumination correction values, and an LED correction drivers (MSM6731BWAF or MSM6732BWAF) together as a pair.
  • Page 13 Page synchronous signal* Line synchronous signal* VDT-P 0.78 msec VCLK-P 8 bits 4992 bits 8 bits VDT-P 0.3 µs VCLK-P VDT-P VLD-P VSTB4-N VSTB3-N VSTB2-N VSTB1-N * CPU internal signal - 11 -...

  • Page 14: Motor And Clutch Control

    Motor and clutch control The electromagnetic clutch is driven by a control signal from the CPU and the drive circuit shown below. The main motor is driven by the control signals from the CPU and the driver IC. Main Motor +26V OPEN IC10...
  • Page 15 (2) Motor drive control Time T0 to T3 determines the motor speed, while the phase different direction between phase signals DMPH1-P and DMPH2-P determines the rotation direction. DMON-P signal control a motor coil current. According to the polarity of the phase signal, the coil current flow as follows: 1) +26V →...

  • Page 16: Fuser Temperature Control

    Fuser Temperature Control The temperature change in a heat controller is converted into the electric potential TEMP corresponding to the change in the resistance value of a thermistor, and the resultant potential is fed back to the control circuit. The CPU performs ON/OFF control of the HEATON-P signal to keep the heat roller temperature constant in accordance with the state at which the thermistor voltage (TEMP) is read into directly by the AD converter of the CPU.
  • Page 17 Flowchart of Thermistor Circuit Check START HEATER OFF Short check timer(t16)set Time-out ? Short error TEMP ? Thermistor short error Thermistor error check timer (t2) set Thermistor disconnection check timer (t35) set Heater On Temperature > Tn To constant temperature control Thermistor error check timer (t2) within time...
  • Page 18 Temperature Controlled Temperature Time HEATER ON Temperature table THERMCMP-N Heater control mode Normal operation Fuser Error Check Paper Thickness 135˚C: light 140˚C: medium light 145˚C: medium 150˚C: medium heavy 155˚C: heavy - 16 -...

  • Page 19: Sensor Control

    3.10 Sensor Control The CPU supervises the state of each sensor every 40 ms. Main Control Board High Voltage Power Supply Board TNRSNS-N PSIN-N PSOUT-N WRSNS-N Sensor signal Shield Transparent - 17 -...

  • Page 20: Cover Open

    3.11 Cover Open When the cover is opened, a cover open microswitch is opened. This makes a CVOPN-N signal low, thereby the CPU detects that cover is open. Furthermore, opening the cover stops applying a +5V power to the high voltage power supply part, resulting in stopping all high voltage outputs. Main Control Board High Voltage Power Supply Board High...

  • Page 21: Power Supply Part

    3.12 Power Supply Part (1) Power supply unit An AC power from an inlet is input to Switching Reg. part .AC power is converted to a +26 VDC output and +5 VDC output. Power supply unit ACIN +26V Filter Circuit Switching Reg.
  • Page 22 Control Signals and High Voltage Outputs Control signal name Level Function Makes the part put out a power to TR. +3 to 5 µA +0.5 to 4 KV TR1PWM (PWM) H/L(PWM) Makes the part put out a -750V power to TR. TR2PWM H/L(PWM) Makes the part put out a -1300V power to CH.

  • Page 23: Troubleshooting

    TROUBLESHOOTING Troubleshooting Table High Voltage Power Supply Board Note: A malfunction of the power supply is not repaired by an agency. The abnormality to be treated here is that of sensors only. Flowchart Failure PC Display Message A paper input jams occur frequently. A - 1 P A P E R I N P U T...
  • Page 24 Main Control Board Flowchart Failure PC Display Message Initialization error and not restored B - 1 C O N N E C T I O N P R O B L E M Program ROM error B - 2 P R O G R A M R O M C H E C K E R R O R Resident RAM error B - 3...

  • Page 25: Troubleshooting Flowchart

    Troubleshooting Flowchart Paper input jams occur frequently. • Is PS4 (Write Sensor ) operating normally? • No Replace PS4. • Yes Is Pin1 of CN8 in main control board operating normally? • No Replace Q4 or Q5 in main control board. •...
  • Page 26 The message “COVER OPEN” remains displayed on the PC display. • Is CVSW (Cover Open Switch) operating normally? • No Replace CVSW. • Yes Failure of IC6 in main control board. The message “TONERLOW” remains displayed on the PC display. •...
  • Page 27 Initialization error and not restored • Is the 16-MHz clock signal being put out to pin 3 of OCS1? • No Replace OSC1. • Yes Failure of IC6 Program ROM error • Replace IC6) Resident RAM error • Are negative pulses being put out to Pin 4 , 23 (RAS0-N , CSA-N) of IC11? •...
  • Page 28 Data sent through the Parallel I/F cannot be received. • Is the signal at Pin 11 (BUSY-P) of CN4 being at low level? • No Is the signal at Pin 13 (BUSY-P) of IC7 (74LS07) changed as shown below, at data reception? ON-LINE OFF-LINE BUSY-P...

  • Page 29: Circuit Diagram

    CIRCUIT DIAGRAM Figure 5-8 ~ 5-13 Main Control PCB (HUK) Circuit Diagram (Rev.1) Figure 5-14 High voltage Power Supply PCB (P2H-) Circuit Diagram (Rev.2) Figure 5-15 High voltage Power Supply PCB (P6L-) Circuit Diagram (Rev.2) - 27 -...
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  • Page 36 Figure 5-14 High Voltage Power Supply PCB (P2H-1/1) Circuit Diagram Rev.3 - 34 -...
  • Page 37 Figure 5-15 High Voltage Power Supply PCB (P6L-1/1) Circuit Diagram Rev.3 - 35 -...

  • Page 38: Component Parts List And Layout

    COMPONENT PARTS LIST - 36 -...

  • Page 39: Huk Pcb

    6.1 HUK Printed Circuit Board REV.1 (00096101YA) - 37 -...
  • Page 40 HUK Printed Circuit Board (00096101 YA – 1/3) Ref. No. Symbol Type/Name Part No. Qty. Remarks 1 00096099 PCB–HUK 4 D501, D503 SS100MA80VACP 611A0000N0001 D–Signal –C 5 D502 RD3 3M–B2 613A0233M0062B D–Zener –C 7 R71 CR/RK73H/ERJ/MCRF–102 3235003F0102 RES–MET RN –C 8 R76 CR/RK73H/ERJ/MCRF104 3235003F0104...
  • Page 41 HUK Printed Circuit Board (00096101 YA – 2/3) Ref. No. Symbol Type/Name Part No. Qty. Remarks 27 R23, R24, R27- CR/RK73K/ERJ/MCRJ332 3235003J0332 R38, R41, R44, RES–MET RN –C 28 R73 CR/RK73K/ERJ/MCRJ432 3235003J0432 RES–MET RN –C 29 R513-R516 CR/RK73K/ERJ/MCRJ472 3235003J0472 RES–MET RN –C 30 R55, R57, R59 CR/RK73K/ERJ/MCRJ512...
  • Page 42 HUK Printed Circuit Board (00096101 YA – 3/3) Ref. No. Symbol Type/Name Part No. Qty. Remarks 514400JP–60 51 IC11 Memory–MOSDRAM–S 8020003N2603 93C46LDP–NW 52 IC4 Mernory–MOSEEPR– 8160303M0000 ML65918–015GA 53 IC6 CK–MOS (ROM) –F 8530194N0003 55 EMI SHORT WIRE (U TYPE) KH–31036–50 58 TR502, TR503 2SA1338 600A1032N0010...

  • Page 43: P2H Pcb

    6.2 P2H Printed Circuit Board REV.3 (40607401YA-1/2) CVSW C237 C117 C240 R228 C115 R113 R124 R114 R100 C112 C116 C114 R115 R229 R237 R118 C236 R234 C110 C302 R104 C111 R105 C301 - 41 -...
  • Page 44 P2H Printed Circuit Board Rev. 3 (40607401YA-2/2-1/4) REF. SYMBOL TYPE/NAME PART NO. Q'TY REMARKS D60, D61, D68, D69 1S953/ 1S2075K/ 1S2473 611A0003L0001 D-Signal - D63,D67, D72, D74 OR-DHM/ ESJA/ SHV-06 40681301 D51, D55-D59, D62, EU02A/ RL105F-F 6100003M0001 D71, D84 D-Rectifying 1ZB300-Y/ Z 613A2003M0001 D-Zener -...
  • Page 45 P2H Printed Circuit Board Rev. 3 (40607401YA-2/2-2/4) REF. SYMBOL TYPE/NAME PART NO. Q'TY REMARKS R235 MRH30MK/ HV-22-30MK 3263103K0306 RES-MET solid R228, R233 RD1/4Y1MΩJ 321A1421J0105 RES-Carbon flm R100 RD1/4Y3MΩJ 321A1421J0305 RES-Carbon flm R115 RNL1/4C3F576KΩ 323A1222F5763 RES-MET RN R114, R236 MRH100MK/ HV-38-100MK 3263103K0107 RES MET solid R237...
  • Page 46 P2H Printed Circuit Board Rev. 3 (40607401YA-2/2-3/4) REF. SYMBOL TYPE/NAME PART NO. Q'TY REMARKS Q11, Q13 BCR1AM-12/ MAC97-008 622A0003M0001 THY-Bi/ Dir CR04AM-12 620A0022M0008 THY-Gate - Q21-Q23 2SC1815-Y 602A1025M0006Y TR-NPN/ H-FREQ Q15-Q17 2SC2235-Y 602A1125M0039Y TR-NPN/ H-FREQ 2SC2752 602A1223M0039 TR-NPN/ H-FREQ C-14576/ SA-8506183 3502003P0102 Coil-Choke T2-T4...
  • Page 47 P2H Printed Circuit Board Rev. 3 (40607401YA-2/2-4/4) REF. SYMBOL TYPE/NAME PART NO. Q'TY REMARKS J1, J2, J40 SHORT WIRE TA-0.6 J3, J4, J7-J12 SHORT WIRE TA-0.6 J13-J21, J23-J27, J29- SHORT WIRE TA-0.6 SHORT WIRE TA-0.6 - 45-...

  • Page 48: P6L Pcb

    P6L Printed Circuit Board REV.3 (40605601YA-1/2) - 46 -...
  • Page 49 P6L Printed Circuit Board Rev. 3 (40605601YA-2/2-1/2) REF. SYMBOL TYPE/NAME PART NO. Q'TY REMARKS D1,D8 EU02A/RL105F-F 6100003M0001 D-Rectifying D2,D3,D9 OR-DHM/ESJA/SHV-06 40681301 ERZV05D391 6320229M0003 SEMICO-Vari D5~D7 ERZ/JVR-05N471 6320003M0001 SEMICO-Vari R1,R4~R6 RD16U/VTJ5.1KΩ 3213420J0512 RES-Carbon flm RD1/4Y1MΩJ 321A1421J0105 RES-Carbon flm MRH100MK/HV-38-100MK 3263103K0107 RES-MET solid C1,C4 MY2A/CQMF-100V-103J 3064003J2103...
  • Page 50 P6L Printed Circuit Board Rev. 3 (40605601YA-2/2-2/2) REF. SYMBOL TYPE/NAME PART NO. Q'TY REMARKS 06FE-ST-VK-N 2244101P0060 Connector-PCB RT-01T-1.0B 2247000P0001 Connector-PCB - 48 -...
  • Page 51 Oki Data Corporation 4-11-22, Shibaura, Minato-ku, Tokyo 108-8551, Japan Tel: (03) 5445-6162 Fax: (03) 5445-6189...

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