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Panasonic KX-MB771GR, Service Manual

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Panasonic KX-MB771GR Service Manual Download Page 107

107

KX-MB771GR

12.3.6. CALL SERVICE TROUBLESHOOTING GUIDE

Call Service related error is most frequent.

Call Service 1 ----- Polygon doesn’t rotate......... Refer to 

LSU (Laser Scanning Unit) SECTION

 (P.40).

• First, listen to the sound. If rotation sound isn't heard, check 24V line, POLON signal and POLCLK signal. If even a little of sound

is heard, check XREADY signal.

Call Service 2 ----- Laser isn't output.......... Refer to 

LSU (Laser Scanning Unit) SECTION

 (P.40)

• This can be judged only by referring to signal. Check 5V line, XHSYNC, XAPC, XVIDEO, XLDON.

Call Service 3 ----- Detection of fixing temperature.......... Refer to 

HEAT LAMP CONTROL CIRCUIT

 (P.54)

• *Service mode *655 tells the detection number and 3 latest temperatures of the thermistor. The detection point of the Call Ser-

vice 3 and the thermistor temperature is displayed. Maximum 3 latest temperatures are displayed showing the newest on the left.
[AABB CCDD EEFF] AA, CC and EE show the detection points and BB, DD and FF show their temperature detection points.
00: CALL SERVICE 3 was not occurred.
01: means that the value of AD did not increased by 6 steps or more within 10 sec soon after the heater was turned ON. (ther-
mistor’s open detection)
02: means that it did not reach the first stabilizing temperature (170

°

C: 5Bh) within 50 seconds.

03: means that it did not reach the second stabilizing temperature (195

°

C: 44h/200

°

C: 40h) within 70 seconds after reaching the

first stabilizing temperature (170

°

C: 5Bh).

04: means that it dropped to 155

°

C: 6Ch/160

°

C: 66h (-40 deg) or below by the temperature control after reaching the second sta-

bilizing temperature (195

°

C: 44h/200

°

C: 40h).

05: means that it did not reach the first stabilizing temperature (170

°

C: 5Bh) within 30 seconds from detection temperature 1

(70

°

C: D8h).

06: means that it became 235

°

C: 2Ah or over during printing.

07: means that during printing the short of the thermistor (AD: 00h) was detected.
08: means that the thermistor’s short (AD: 00h) and open (AD: FFh or over) were detected.

<Note>

Call Service 4 ----- Rotation of Fan.......... Refer to 

FAN MOTOR SECTION

 (P.37)

• Connector isn’t inserted firmly, dust is caught in and the fan is broken.
• Rotation of the Fan can be confirmed by following Test Mode.

Service mode *677
:1... Normal operation (default)
:2... Right Fan ON (High speed)
:3... Right Fan ON (Low speed)
:4... Left Fan ON (High speed)
:5... Left Fan ON (Low speed)
:6... Both Fan OFF

Call service 5 ----- Rotation of Engine motor.......... Refer to 

MOTOR DRIVE SECTION

 (P.30)

• Engine motor’s rotation detection signal LD did not become Low within rated speed ±6.25%.
• Service mode *556: the operation of Main Motor can be checked by pressing 0 and SET buttons.

Call service 6 ----- Detection of Charger error.......... Refer to the 

HVPS (High Voltage Power Supply) SECTION

 (P.52)

• Breaking of charger’s wire of Drum Unit and/or loose connection of High voltage terminals (CHRG, GRID). 
• First, replace the Drum unit even so, it doesn’t function check the high voltage power supply.

* As for Call Service 1, 2, 4, 5 and 6, turn the power OFF then ON to restart.

Once “CALL SERVICE3” is displayed, it does not disappear until the Factory Setup or Service Function #529 is 

executed.

Therefore Service Function #529 should not be executed before the confirmation, and #529 should be done after the countermea-
sure.

Summary of Contents for KX-MB771GR

Page 1: ... 2007 Panasonic Communications Co Ltd All rights reserved Unauthorized copying and distribu tion is a violation of law ORDER NO KMF0711127CE Multi Function Printer KX MB771GR for Greece ...

Page 2: ... an example of the SYSTEM SETUP LIST the unit prints out 89 11 3 SERVICE MODE SETTINGS Example of a printed out list 90 11 4 HISTORY 91 12 Troubleshooting Guide 94 12 1 USER RECOVERABLE ERRORS 94 12 2 REMOTE PROGRAMMING 96 12 3 TROUBLESHOOTING DETAILS 101 12 4 DOCUMENT JAMS AUTO DOCUMENT FEEDER 176 12 5 RECORDING PAPER JAM 178 13 Service Fixture Tools 186 14 Disassembly and Assembly Instructions 1...

Page 3: ...manual so as to pre vent fires injury or electric shock which can be caused by improper repair work 1 When repair services are provided neither the products nor their parts or members shall be remodeled 2 If a lead wire assembly is supplied as a repair part the lead wire assembly shall be replaced 3 FASTON terminals shall be plugged straight in and unplugged straight out ICs and LSIs are vulnerabl...

Page 4: ...sections of the unit supplied with AC power by the AC power cord are live Never disassemble the unit for service with the AC power supply plugged in CAUTION AC voltage is supplied to the primary side of the power supply unit Therefore always unplug the AC power cord before disas sembling for service 1 4 SERVICE PRECAUTIONS 1 4 1 PRECAUTIONS TO PREVENT DAMAGE FROM STATIC ELECTRICITY Electrical char...

Page 5: ...ering iron please be careful not to heat too long PbF solder will tend to splash if it is heated much higher than its melting point approximately 1100 F 600 C If you must use Pb solder on a PCB manufactured using PbF solder remove as much of the original PbF solder as possible and be sure that any remaining is melted prior to applying the Pb solder When applying PbF solder to double layered boards...

Page 6: ... there is a possibility of a shock hazard 2 4 BATTERY CAUTION CAUTION Danger of explosion if the battery is replaced incorrectly Replace only with the same or equivalent type recommended by the manufacturer Dispose used batteries according to the manufacturer s instructions The lithium battery is a critical component type No CR2354 Please observe for the proper polarity and exact location when rep...

Page 7: ...zontal 8 pels mm Vertical 3 85 lines mm STANDARD 7 7 lines mm FINE PHOTO 15 4 lines mm SUPER FINE Photo resolution 64 level Scanner Type Color Contact Image Sensor Printer Type Laser printer Data Compression System Modified Huffman MH Modified READ MR Modified Modified READ MMR Modem Speed 33 600 31 200 28 800 26 400 24 000 21 600 19 200 16 800 14 400 12 000 9 600 7 200 4 800 2 400 bps Automatic F...

Page 8: ...8 KX MB771GR 4 2 TRANSLATION LISTS 4 2 1 HELP FUNCTION ...

Page 9: ...9 KX MB771GR 4 3 ERROR MESSAGE 4 3 1 DISPLAY ...

Page 10: ...10 KX MB771GR 4 3 2 REPORT 4 3 3 OTHERS ...

Page 11: ...to 99 copies Enlargement and reduction 64 Level halftone 5 2 HARDWARE REQUIREMENTS FOR MULTI FUNCTION SOFTWARE To use Multi Function Station on your computer the following are required Operating System Windows 98 Windows Me Windows 2000 Windows XP Windows VistaTM operating system CPU Windows 98 Pentium 90 MHz or faster Windows Me Pentium 150 MHz or faster Windows 2000 Pentium 166 MHz or faster Win...

Page 12: ...12 KX MB771GR 6 Technical Descriptions 6 1 CONNECTION DIAGRAM ...

Page 13: ...ages on the OPC DRUM by rotating polygon motor and reflecting the laser beam against polygon SENSORS Composed of 2 switches and 5 sensors POWER SUPPLY BOARD Supplies 24V and 7V to the Main unit and controls the Heat Lamp HIGH VOLTAGE POWER SUPPLY BOARD Supplies bias need for the printing operation bias of the DRUM Developing and Transcription FIXING UNIT Composed heat lamp thermistor and thermosta...

Page 14: ...N750 CN300 CN100 CN101 CN200 CN510 CN500 CN501 CN502 CN504 CN505 CN511 CN508 CN507 CN514 CN506 CN58 CN57 CN56 CN61 CN62 CN60 CN59 CN2 CN1 DC motor Resist Solenoid Pick up Solenoid HVU FAN motor left Hole IC Pick Up Sensor Toner Sensor CN64 CN67 CN66 CN65 CN51 CN63 CN53 CN52 CN50 FAN motor right Thermostat Heater lamp SWPS CN101 AC inlet Thermistor Heater Thermostat AC cord set DC DC CONVERTER ADF ...

Page 15: ...RAM MODEM Scanner I F Print I F AFE IC503 IC400 IC300 Main Board FB transit Board CN300 SDRAM I F USB USB I F CPU DAA IC100 IC101 LAN I F DSP JBIG CN100 CISunit LSU TEL LINE PC FAX Rx 1 FAX data is input from TEL LINE to MODEM in IC300 through DAA circuit And then store it in IC400 through SDRAM I F 2 CPU decompress the data in IC400 3 Print I F retrieve the data from IC400 and output it to LSU CN...

Page 16: ...I F Print I F AFE IC503 IC400 IC300 Main Board FB transit Board CISunit LSU CN300 SDRAM I F USB USB I F CPU DAA IC100 IC101 LAN I F DSP JBIG CN100 TEL LINE PC PC print CN59 CN510 CN61 CN500 SDRAM MODEM Scanner I F Print I F AFE IC503 IC400 IC300 Main Board FB transit Board CN300 SDRAM I F USB USB I F CPU DAA IC100 IC101 LAN I F DSP JBIG CN100 1 The print data is output from PC through USB and pass...

Page 17: ...100 IC101 LAN I F DSP JBIG CN100 1 An analog image data is output from CISunit to IC503 IC503 decode the analog data to digital data and output to IC300 Scanner I F in IC300 process image data and store it in IC400 through SDRAM I F 2 If necessary the data is compressed via JBIG 3 Print I F retrieve the data from IC400 and output it to LSU CISunit LSU TEL LINE PC ...

Page 18: ...SDRAM DATA BUS 8 AA02 SDMD9 I O 3 3V SDRAM DATA BUS 9 AA03 SDMA7 O 3 3V SDRAM ADDRESS BUS 7 AA04 SDMA6 O 3 3V SDRAM ADDRESS BUS 6 AA23 VDD1 2 1 2V POWER SUPPLY AA24 AFERST O 3 3V NCU INTERFACE AA25 RING I 3 3V NCU INTERFACE AA26 EXTINT I 3 3V NCU INTERFACE AB01 SDMD10 I O 3 3V SDRAM DATA BUS 10 AB02 SDMD11 I O 3 3V SDRAM DATA BUS 11 AB03 SDMA5 O 3 3V SDRAM ADDRESS BUS 5 AB04 VDD1 2 1 2V POWER SUPP...

Page 19: ...TX_CLKI I 3 3V ETHERNET INTERFACE AE07 TXD2 O 3 3V ETHERNET INTERFACE AE08 RX_CLKI I 3 3V ETHERNET INTERFACE AE09 RXD3 I 3 3V ETHERNET INTERFACE AE10 MDC O 3 3V ETHERNET INTERFACE AE11 NC NOT USED AE12 USBID O 3 3V NOT USED AE13 USBDM I O 3 3V USB INTERFACE AE14 USBVSSA12_SQ GND GND AE15 USBVDDA12PLL 1 2V POWER SUPPLY AE16 USBVDDA12 1 2V POWER SUPPLY AE17 LSI_TDI I 3 3V NOT USED AE18 LSI_PROCMON O...

Page 20: ...2 FRMA16 O 3 3V FLASH MEMORY ADDRESS BUS 16 B23 FRMA19 O 3 3V FLASH MEMORY ADDRESS BUS 19 B24 FRMA21 O 3 3V FLASH MEMORY ADDRESS BUS 21 B25 VSS GND GND B26 DOTPLLVSS GND GND C01 AFEADC3 I 3 3V NOT USED C02 AFEADC1 I 3 3V NOT USED C03 VSS GND GND C04 LEDONR O 3 3V SCANNER INTERFACE C05 OEB O 3 3V NOT USED C06 CCDSH O 3 3V SCANNER INTERFACE C07 PIO31 O 3 3V OPERATION PANEL INTERFACE C08 OPMPWR O 3 3...

Page 21: ...AFESIFCLK O 3 3V SCANNER INTERFACE F04 VDD1 2 1 2V POWER SUPPLY F23 PIO24 I 3 3V LSU INTERFACE F24 PIO61 O 3 3V OUTPUT PORT SPMUTE F25 PIO60 O 3 3V NOT USED F26 PIO3 O 3 3V LSU INTERFACE G01 SDMD18 I O 3 3V SDRAM DATA BUS 18 G02 SDMD19 I O 3 3V SDRAM DATA BUS 19 G03 AFESIFDIN I 3 3V SCANNER INTERFACE G04 AFESIFEN O 3 3V SCANNER INTERFACE G23 PSCIO24 I 3 3V LSU INTERFACE G24 PIO2 O 3 3V LSU INTERFA...

Page 22: ...D28 I O 3 3V SDRAM DATA BUS 28 N02 SDMD29 I O 3 3V SDRAM DATA BUS 29 N03 SDBA0 O 3 3V SDRAM BANK ADDRESS 0 N04 VDD1 2 1 2V POWER SUPPLY N11 VSS GND GND N12 VSS GND GND N13 VSS GND GND N14 VSS GND GND N15 VSS GND GND N16 VSS GND GND N23 VDD3 3 3 3V POWER SUPPLY N24 PIO23 O 3 3V NOT USED N25 PIO22 O 3 3V NOT USED N26 PIO20 O 3 3V NOT USED P01 SDMD30 I O 3 3V SDRAM DATA BUS 30 P02 SDMD31 I O 3 3V SDR...

Page 23: ...O 3 3V OUTPUT PORT EXTRLY U26 PIO7 O 3 3V NOT USED V01 SDMD4 I O 3 3V SDRAM DATA BUS 4 V02 SDMD5 I O 3 3V SDRAM DATA BUS 5 V03 SDCKE O 3 3V SDRAM CLOCK ENABLE V04 SDMA12 O 3 3V SDRAM ADDRESS BUS 12 V23 PSCIO20 O 3 3V NOT USED V24 PSCIO21 O 3 3V NOT USED V25 PSCIO22 O 3 3V NOT USED V26 PSCIO23 O 3 3V NOT USED W01 SDMD6 I O 3 3V SDRAM DATA BUS 6 W02 SDMD7 I O 3 3V SDRAM DATA BUS 7 W03 SDMA11 O 3 3V ...

Page 24: ...0 Backup Circuit Operation When the power switch is turned ON power is supplied to the RTC inside IC300 At this time the voltage at pin AD4 of the IC300 is 3 3V When the power switch is turned OFF the BAT300 supplies power to RTC through DA300 When the power switch is OFF and the voltage of 3 3V decreases pin AD4 of RTC IC300 becomes roughly the same volt age as the battery voltage RTC goes into t...

Page 25: ...e telephone line Facsimile Reception The analog image data which is received from the telephone line passes through the NCU section and enters line side DAA 1 IC100 The signals are changed to digital data in IC100 5 6 IC101 9 10 5 and IC300 In this case the image signals from the telephone line are transmitted serially Here the internal equalizer circuit reduces the image signals to a long distanc...

Page 26: ...300 Circuit Operation NCU Network Control Unit the NCU comprises of the following DC loop forming circuit to connect with the telephone line Switching circuit for other interconnected telephones Bell detection circuit Remote fax activation circuit Refer to NCU SECTION P 27 for the details 6 3 4 2 BLOCK DIAGRAM RING ARXD ATXD BTXD BRXD IC200 IC100 IC101 EXTRLY T R T R SP SP HS_MIC HS_MIC HS_SP HS_S...

Page 27: ...hone exchange is sent during the interval between the first and second rings of the bell signal The data from the telephone exchange is a modem signal which is modulated in an FSK Frequency Shift Keying format Data 0 is a 1200 Hz sine wave and data 1 a 2200 Hz sine wave There are two type of the message format which can be received i e the single data message format and multiple data mes sage form...

Page 28: ... a DTMF MONITOR Speaker Operation IC300 AB24 IC200 4 1 IC202 2 1 IC204 4 5 8 CN200 1 2 CN58 1 2 CN57 1 2 SPEAKER Handset Operation IC300 AB24 IC200 4 16 IC203 4 8 CN200 7 8 CN58 7 8 OPTION HANDSET UNIT b ALARM BEEP KEY TONE BELL IC300 B20 IC202 2 1 IC204 4 5 8 CN200 1 2 CN58 1 2 CN57 1 2 SPEAKER 6 5 1 3 TAM INTERFACE SECTION 1 Function When TAM is connected to this unit the unit receives documents...

Page 29: ...IC300 goes to a low level and the transistor Q518 turns on This applies voltage to the CIS The CIS is driven by each of the CCDSH CCDCLK signals output from IC300 and the original image illuminated by the LED to output an analog image signal The analog image signal is input to the AFE on VINP 20pin of IC503 and converted into 16 bit data by the A D converter inside IC503 Then this signal undergoes...

Page 30: ...al 2 Clock signal Output pin Pin A12 Output Signal Pulse Pulse frequency approx 1 9KHz at normal printing speed Pulse frequency approx 0 5KHz at half printing speed This signal is also inverted by transistor Q525 and supplied to motor as clock signal 3 Brake signal Output pin Pin C12 Output Signal H When this signal is inverted by transistor Q526 and becomes L motor recognize this signal as brake ...

Page 31: ...tput Signal L When this signal is inverted by transistor Q502 and becomes H motor recognize this signal as stop signal 2 Brake signal Output pin Pin C12 Output Signal L When this signal is inverted by transistor Q526 and becomes H motor recognize this signal as brake on signal Timing Chart of Stop operation 6 7 1 1 ENGINE MOTOR DRIVE CIRCUIT ...

Page 32: ...motor current Vref voltage of each motor driver is controlled When Vref voltage is high motor current is increased and the voltage is low motor current is reduced In order to control Vref voltage PWM pulse is supplied from IC300 pin D8 PWM pulse is inverted by Q521 and integrated by R533 R534 and C567 then convert to DC voltage This DC voltage is supplied to Vref pin of each motor driver through Q...

Page 33: ...il A 1 step rotation of this motor feeds 0 021mm of CIS unit 3 Circuit Diagram 6 7 2 3 ADF AUTO DOCUMENT FEEDER MOTOR DRIVE CIRCUIT ADF EQUIPPED MODEL ONLY 1 Functions This motor functions for main operations including FAX transmission ADF copy and PC scan This motor feeds document which are set to ADF with synchronizing for reading 2 Motor operation During motor driving pin D9 of IC 300 become lo...

Page 34: ...4 KX MB771GR 6 8 TIMING CHART AND WAVE FORM OF SCANNER MOTORS Control sequence and waveform of both FB and ADF motor are almost same 6 8 1 NORMAL 1 2 PHASE EXCITATION HALF STEP 1 Timing chart 2 Wave form ...

Page 35: ...35 KX MB771GR 6 8 2 FLAT TORQUE 1 2 PHASE EXCITATION HALF STEP 1 Timing chart 2 Wave form ...

Page 36: ...36 KX MB771GR 6 8 3 W 1 2 PHASE EXCITATION QUARTER STEP 1 Timing chart 2 Wave form ...

Page 37: ... to radiate the heat inside of the unit 6 9 1 LEFT SIDE FAN FAN1 When the output of pin A11 of IC300 becomes high level or pulse Left side FAN FAN1 is activated During the FAN rotation the pulse signal is output from pin 2 of FAN1 and input to pin AC20 of IC300 When this pulse is stopped it is judged that FAN error occurred ...

Page 38: ...he FANs with full speed constant high level are output from A11 and D11 of IC300 Then Q512 Q510 and Q519 Q520 are all turned on So 24V are output from collectors of Q510 and Q520 Since each FAN consumes approx 0 1A approx 4V is reduced through R525 and R530 Then approx 20V are supplied to each FANs 2 Half speed control To rotate the FANs with half speed pulse signals are output from A11 and D11 of...

Page 39: ... and Pick up Solenoid These solenoids are designed to be driven 24V The diodes protect transistors from reverse generated voltage when solenoids are turned off RESISTANCE MODE IC300_T26 Solenoid ON High level Solenoid OFF Low level PICKUP MODE IC300_T23 Solenoid ON High level Solenoid OFF Low level ...

Page 40: ...40 KX MB771GR 6 11 LSU Laser Scanning Unit SECTION ...

Page 41: ...41 KX MB771GR ...

Page 42: ...umber Message Error Pickup sensor Pickup Fan2 PCB SW50 PAPER JAMMED CHECK REAR CVR WRONG PAPER PRESS START Exit sensor Fuser PCB PS50 PAPER JAMMED Read position sensor Sensor PCB PS53 CHECK DOCUMENT Resistance Manual paper sensor Resist PTOP PCB PS51 PAPER JAMMED Print timing sensor Resist PTOP PCB PS52 PAPER JAMMED Document sensor Sensor PCB PS54 Top cover sensor H V P S SW1 TOP COVER OPEN Toner ...

Page 43: ... whether Rear Cover is opened or closed When there is a recording paper at the position of the switch the input signal of IC300 AE20pin becomes low level When there is no recording paper at the position of the switch the input signal of IC300 AE20pin becomes high level High Voltage ERROR Status Drum sensor Signal IC300 P26 Abnormal DRUM can not be detected Low level Normal DRUM can be detected Hig...

Page 44: ...de of the FB cabinet 6 12 4 READ POSITION SENSOR This sensor detects the front edge of the document When the front edge of the document is detected the shelter plate closes the sensor light So the photo transistor turns off and the input signal of IC300 AD22pin becomes high level When the front edge of the document is not detected the shelter plate lets the sensor light pass So the photo transisto...

Page 45: ...AF20pin becomes high level 6 12 6 PRINT TIMING SENSOR This sensor detects whether the recording paper is at the printing position When the recording paper is detected the shelter plate lets the sensor light pass So the photo transistor turns on and input signal of IC300 W26pin becomes low level When the recording paper is not detected the shelter plate closes the sensor light So the photo transist...

Page 46: ... the photo transistor turns on and input signal of IC300 AF23pin becomes low level 6 12 8 TOP COVER SENSOR The Switches detect whether the top cover is open or closed When the top cover is closed the switches turn ON and the input signal of IC300 W25pin becomes a low level When the top cover is open the switches turns OFF and the input signal of IC300 W25pin becomes a high level Photo transistor S...

Page 47: ...agnet put on the pendulum of Mixing Paddle The pendulum is pushed up by the Mixing Paddle then it falls down by its own weight The rotation speed of paddle is set slower than the one of pendu lum which falls down by its own weight When the toner is still left the pendulum falls and stops on the toner then pushed by the paddle it starts to rotate When no toner is left the pendulum falls to the bott...

Page 48: ...times TONER LOW signal at only printing It is not executed at 2 Toner full can be judged by continuous 3 times TONER FULL signal at initialization It is not executed at printing 3 In the ordinal operation CHECK DRUM is displayed when TONER EMPTY sensor does not generate a signal for 3 3 sec onds ...

Page 49: ...49 KX MB771GR 6 12 9 2 Drum Detection ...

Page 50: ...ecuted by hardware scanning 2 LED AUTO ANSWER LED ON OFF port LED6 IC1 2pin FAX MODE LED ON OFF port XLED8 IC1 5pin COPY MODE LED ON OFF port LED5 IC1 41pin SCAN MODE LED ON OFF port LED2 IC1 36pin KIN0 KIN1 KIN2 KIN3 KIN4 KIN5 KIN6 KIN7 KSL0 AUTO ANSWER S1 S3 MONITOR KSL1 FAX S2 ZOOM FLASH 7 0 START KSL2 COPY COLLATE REDIAL SET 4 9 6 KSL3 CONTRAST N in 1 MENU 2 5 STOP KSL4 LED7 SCAN RESOLUTION LO...

Page 51: ...rks only for writing the ASCII code from the data bus D4 D7 V0 is supplied for the LCD drive R118 and R117 are density control resistors Consequently in this unit the timing positive clock is generated by the LCD interface circuitry in the gate array IC1 ...

Page 52: ...UTPUT GRID BIAS is generated by the current flowing in the GRID circuit via charge wire and GRID Charge CHG Grid Developing DC Developing AC Transfer TRA Transfer TRA Output Characteristics Constant current Constant voltage Constant voltage Constant voltage Constant current Variable Constant voltage Nominal Output Voltage 4 35KV 475 10V 230V 15V 50 300V PWM20 300MΩ 220pF 330V 15Vp p 34KHz 100MΩ 1 ...

Page 53: ...kHz wave of developing AC voltage is output from DEV OUTPUT This voltage is overlapped with developing DC voltage and output as AC voltage that includes the development DC voltage 6 15 5 TRA BIAS Transfer BIAS TRA BIAS Transfer BIAS UNIT When CHG REM is L and TRA CLK is open Charge BIAS 200µA is output from CHG OUTPUT and at the same time Transfer BIAS 785V is output from TRA OUTPUT When 5 086kHz ...

Page 54: ...n off by the HTRCTL signal IC300 AD19pin through the photo triac PC2 and the triac SCR51 And two thermostats are set on the AC line as the safety devices 1 Control at Printing a After the printing signal is received turn ON the heater b After that turn ON the motor at the Primary Stable Temperature 170 C c After that control at the Secondary Stable temperature 195 C 200 C and feed papers ...

Page 55: ...55 KX MB771GR ...

Page 56: ...B 85 200 C8 169 92 5C 2 251 FB 86 199 C7 170 91 5B 3 251 FB 87 198 C6 171 90 5A 4 251 FB 88 197 C5 172 89 59 5 251 FB 89 196 C4 173 88 58 6 251 FB 90 195 C3 174 87 57 7 250 FA 91 193 C1 175 86 56 8 250 FA 92 192 C0 176 85 55 9 250 FA 93 191 BF 177 84 54 10 250 FA 94 190 BE 178 83 53 11 249 F9 95 188 BC 179 82 52 12 249 F9 96 187 BB 180 81 51 13 249 F9 97 186 BA 181 80 50 14 249 F9 98 184 B8 182 79...

Page 57: ... 55 229 E5 139 129 81 223 48 30 56 228 E4 140 127 7F 224 48 30 57 228 E4 141 126 7E 225 47 2F 58 227 E3 142 125 7D 226 46 2E 59 226 E2 143 123 7B 227 46 2E 60 225 E1 144 122 7A 228 45 2D 61 224 E0 145 121 79 229 45 2D 62 224 E0 146 120 78 230 44 2C 63 223 DF 147 118 76 231 44 2C 64 222 DE 148 117 75 232 43 2B 65 221 DD 149 116 74 233 43 2B 66 220 DC 150 114 72 234 42 2A 67 219 DB 151 113 71 235 42...

Page 58: ... 3F 86 18 12 7 174 AE 40 61 3D 87 18 12 6 171 AB 41 60 3C 88 17 11 5 168 A8 42 58 3A 89 17 11 4 166 A6 43 57 39 90 16 10 3 163 A3 44 55 37 91 16 10 2 160 A0 45 54 36 92 16 10 1 158 9E 46 52 34 93 15 0F 0 155 9B 47 51 33 94 15 0F 1 152 98 48 50 32 95 14 0E 2 150 96 49 48 30 96 14 0E 3 147 93 50 47 2F 97 14 0E 4 144 90 51 46 2E 98 13 0D 5 141 8D 52 45 2D 99 13 0D 6 139 8B 53 43 2B 100 13 0D 7 136 88...

Page 59: ...opped D303 controls no to be a over voltage at 3 3V output when ICs including IC302 break down 1 2V Power Supply descriptions IC305 is Nch FET used Switching Regulator with synchronous rectification system Oscillation frequency is set at approximately 350kHz R356 is a resistor for decreasing the output voltage when the output current shows high The value is compared with the voltage drop at FET C3...

Page 60: ...60 KX MB771GR DC DC Main Board Supply ...

Page 61: ...61 KX MB771GR wave form ...

Page 62: ...en the AC power is turned on and Q1 begins operating Over Current Limiter O C L The highest drain current of Q1 is limited by a limit current circuit The 24V output is limited by this circuit Over Voltage Circuit If the 24V output increases because the error detecting circuit or control circuit is broken Control circuit will recognize this signal and output becomes 0V D104 and D503 also prevent ov...

Page 63: ...eloping When paper is fed from the standard cassette the plunger of solenoid is pulled to drive PICK UP ROLLER STANDARD then the roller starts feeding paper When paper is fed manually first the plunger of solenoid is pulled to stop RESISTANT ROLLER After a few moments turn off the solenoid to drive RESISTANT ROLLER then the roller starts feeding paper ...

Page 64: ...ick up paper Pick upped paper is separated by SEPARATION ROLLER DOC and SEPARATION RUBBER DOC and then fed by FEED ROLLER DOC After being read by CIS the paper is ejected by ROLLER DOC EJECT DOCUMENT TRANSMISSION SCANNER GLASS CIS Module is carried by the belt timing along the shaft carriage to the reading start position Then it goes back to the home position reading the document through the glass...

Page 65: ...er 3 Document guides 4 Document cover 5 Output tray 6 Top cover release lever 7 Document entrance 8 Paper input tray 9 Recording paper exit 10 Document exit 7 1 2 Rear view 1 Recording paper guides 2 Speaker 3 Power inlet 4 Manual input tray Rear cover 5 External telephone jack 6 Telephone line jack 7 USB interface connector ...

Page 66: ...COLLATE 3 DIRECTORY 4 CONTRAST 5 RESOLUTION 6 ZOOM 6 QUICK SCAN 7 PAGE LAYOUT 8 SET 9 MENU 10 CALLER ID 11 REDIAL PAUSE 12 STOP 13 FAX AUTO ANSWER 14 FAX 15 BROADCAST 16 MANUAL BROAD 17 Station keys 18 Navigator key 19 LOWER 20 MONITOR 21 R 22 START ...

Page 67: ... approximately 150 sheets of printed paper Remove the printed paper before the output tray becomes full Do not place the unit in an area where the output tray may be easily bumped into 1 Pull the output tray extender 1 forward gently until it clicks into place then press the centre part of the extender 2 to open ...

Page 68: ... for printing A4 size paper by default If you want to use letter or legal size paper change the setting Refer to PROGRAM MODE TABLE P 98 1 Pull the paper input tray 1 until it clicks into place then pull it com pletely out lifting the front part of the tray 2 Before loading a stack of paper fan the paper to prevent paper jams 3 Load the paper print side up 2 Important Push and lock the plate 3 in ...

Page 69: ...not be loaded over the snubbers 7 5 Insert the paper input tray to the unit lifting the front part of the tray Then push it completely into the unit Note If the paper is not loaded correctly re adjust the paper guides or the paper may jam If the paper input tray does not close the plate in the paper input tray may be lifted Push the paper and make sure that the paper is laid flat in the paper inpu...

Page 70: ...ng with the computer 1 Adjust the width of the guides 1 to the size of the recording paper 2 Insert the paper print side down 2 until the unit grasps the paper and a single beep is heard Note If the paper is not inserted correctly re adjust the paper or the paper may jam Make sure the unit grasps the recording paper as specified in step 2 The display shows the following To use the manual input tra...

Page 71: ...If the documents exceed the capacity of the auto doc ument feeder they may fall or cause a jam in the feeder To set a document with a width of less than 210 mm we recommend using the scanner glass to copy the original document onto A4 or letter sized paper then setting the copied document Do not set documents that do not satisfy the requirements of size and weight Make a copy of the document using...

Page 72: ...nt quality which may occur from the use of a non Panasonic toner cartridge and drum unit The drum unit contains a photosensitive drum Exposing it to light may damage the drum Once you have opened the protection bag Do not expose the drum unit to light for more than 5 minutes Do not touch or scratch the black drum surface Do not place the drum unit near dust or dirt or in a high humidity area Do no...

Page 73: ...ile pressing down firmly 5 Make sure that the triangles 6 match to install the toner cartridge cor rectly 6 Lift the top cover release lever 7 and open the top cover 8 Note Do not touch the transfer roller 9 If the lower glass 10 is dirty clean it with a soft and dry cloth ...

Page 74: ...74 KX MB771GR 7 Install the drum and toner unit 11 by holding the tabs Make sure that the triangles 12 match to install the drum and toner unit correctly 8 Close the top cover until locked ...

Page 75: ...M MODE TABLE P 98 The toner cartridge will last approximately 40 longer This feature may lower the print quality Waste disposal method Waste material should be disposed of under conditions which meet all national and local environmental regulations Caution To prevent injuries be careful not to put your hands under the top cover ...

Page 76: ...Please purchase a shielded Type A male Type B male USB cable 8 1 6 INSTALLING MULTI FUNCTION STATION Install Multi Function Station before connecting the unit to a computer with USB cable If the unit is connected to a computer before installing Multi Function Station the Found New Hardware Wizard dialogue box will appear Click Cancel to close it The screenshots shown in these instructions are for ...

Page 77: ...s Vista a message may appear after connecting the unit with the USB cable This is normal and the software will not cause any difficulties with your operating system You can continue the installation with no problem For Windows XP users The software you are installing for this hardware has not passed Windows Logo testing to verify its compatibility with Windows XP For Windows Vista users Would you ...

Page 78: ...hine or an extension telephone Remove the stopper if attached 4 Answering machine not included Important notice for the USB connection Do NOT connect the USB cable until prompted by the Multi Function Station Note If any other device is connected to the same telephone line this unit may disturb the network condition of the device If you use the unit with a computer and your internet provider instr...

Page 79: ...79 KX MB771GR 9 Operation Instructions 9 1 YOUR LOGO You can program your logo name company name etc so that it appears on the top of each page sent ...

Page 80: ... Press dial keys to enter characters and numbers Press STOP to erase the character or number highlighted by the cursor Press and hold STOP to erase all characters or num bers To enter another character located on the same dial key press to move the cursor to the next space then press the appropri ate dial key 9 1 2 TO SELECT CHARACTERS USING OR ...

Page 81: ...s SET ROM CHECK Service Mode 5 5 1 Indicates the version and checks the sum of the ROM SET LCD TEST Service Mode 5 5 8 Checks the LCD indication Illuminates all the dots to check if they are normal SET DTMF SINGLE TONE TEST Service Mode 5 5 2 Outputs the DTMF as single tones Used to check the frequencies of the individ ual DTMF tones Refer to DTMF SINGLE TONE TRANSMIT SELECTION P 83 1 ON 2 OFF LED...

Page 82: ...mistor DF 00 high temp FF low temp None None U Pickup Rear Cover U Paper detect No paper T Print timing T Paper detect No paper None None None None None None None None None None PRINT TEST PAT TERN Service Mode 8 5 2 1 Press 852 then the SET key in the service mode 2 As PATNO is displayed on the LCD enter the test pattern No and press the SET key 3 When No is displayed on the LCD enter the printin...

Page 83: ...83 KX MB771GR 10 1 1 DTMF SINGLE TONE TRANSMIT SELECTION Note After performing this check do not forget to turn the setting off otherwise dialing in DTMF signal will not work 10 1 2 BUTTON CODE TABLE ...

Page 84: ...PRINT TEST PATTERN 1 NO 01 2 NO 06 3 NO 03 These print test patterns are just image printing and differ ent from actual ones When it is required to judge the print quality compare with the printing of a nondefective machine ...

Page 85: ...rmal programs are those listed in the Operating Instructions and are available to the user The special programs are only those listed here and not displayed to the user In both the User and Service Modes there are Set Functions and Test Functions The Set Functions are used to program various features and functions and the Test Func tions are used to test the various functions The Set Functions are...

Page 86: ... 2 2 529 Call Service Clear 550 Memory clear Refer to Memory Clear Specification P 88 551 ROM check See P 81 552 DTMF single tone test 1 ON 2 OFF 1 2 2 See P 81 553 Monitor on FAX communication select 1 OFF 2 PHASE B 3 ALL 1 3 1 Sets whether to monitor the line signal with the unit s speaker during FAX communication or not 554 Modem test See P 81 555 Scanner test See P 81 556 Motor test 0 See P 81...

Page 87: ...istory data Refer to Memory Clear Specification P 88 711 Dialing mode 1 PULSE 2 TONE 1 2 2 717 Transmit speed select 1 14400BPS 2 12000BPS 3 9600BPS 4 7200BPS 5 4800BPS 6 2400BPS 1 6 1 If the code 527 is set at 1 the code 717 and 718 work 718 Receive speed select 1 14400BPS 2 12000BPS 3 9600BPS 4 7200BPS 5 4800BPS 6 2400BPS 1 6 1 If the code 527 is set at 1 the code 717 and 718 work 721 Pause tone...

Page 88: ...1 Execute Service Mode 550 when you want to reset the all setting data keeping the user information 2 Execute Service Mode 710 to clear the user information in case that Main Unit is recycled Note Please restart a power supply after clearing a memory ...

Page 89: ...89 KX MB771GR 11 2 USER MODE The list below is an example of the SYSTEM SETUP LIST the unit prints out Note The above values are the default values ...

Page 90: ...90 KX MB771GR 11 3 SERVICE MODE SETTINGS Example of a printed out list Note The above values are the default values ...

Page 91: ...91 KX MB771GR 11 4 HISTORY Note See the following descriptions of this report Item No 1 49 are corresponding to the listed items in DESCRIPTIONS OF THE HISTORY REPORT P 92 ...

Page 92: ...ed for the Scan ner The number of pages scanned If the unit does not have a PC interface NONE will be printed 27 NUMBER OF PC PRINT The number of times multifunction was used for the Printer The number of pages printed If the unit does not have a PC interface NONE will be printed 28 NUMBER OF RECEIVING TO PC The number of times received in the PC through the USB cable The number of pages received ...

Page 93: ...93 KX MB771GR 59 Not used 60 Total number of printing The number of printed papers including copy reception printing report etc 61 Not used 62 Not used ...

Page 94: ...e recording paper The paper input tray is not installed or is not inserted completely Insert the paper input tray into the unit 2 Manual input tray Recording paper was not fed into the unit properly Re insert the recording paper The rear cover is open Close it A recording paper jam occurred near the manual input tray Remove the jammed paper There is no space to store new items in navigator directo...

Page 95: ...two or more sheets and try again The recording paper is installed in the manual input tray when trying to copy receive faxes or print reports Remove the recording paper from manual input tray The drum unit s service life is finished Replace the drum unit immediately The memory is full of received documents due to a lack of recording paper or a recording paper jam Install paper or remove the jammed...

Page 96: ...t code 991 and the service list code 999 from the customer s fax machine Based on this the parameters for the desired codes can be changed The procedure for changing and listing parameters is described on ENTERING THE REMOTE PROGRAMMING MODE AND CHANGING SERVICE CODES P 97 Also before exiting the remote programming mode it is advisable to obtain a new list to confirm that the changes were made cor...

Page 97: ...97 KX MB771GR 12 2 1 ENTERING THE REMOTE PROGRAMMING MODE AND CHANGING SERVICE CODES CROSS REFERENCE PROGRAM MODE TABLE P 98 ...

Page 98: ...OK Code Function Set Value Default Remote Setting 212 DELAYED RING COUNT 1 9 2 OK 401 PRINT SENDING REPORT 1 Error 2 ON 3 OFF Error OK 402 JOURNAL AUTO PRINT 2 ON 1 OFF ON OK 404 RECEIVING MODE 1 TEL 2 TEL FAX TEL OK 411 OVERSEAS MODE 1 NEXT FAX 2 ERROR 3 OFF ERROR OK 412 DELAYED TRANSMISSION 1 ON 0 OFF OFF NG 413 ECM SELECTION 2 ON 1 OFF ON OK 416 CONNECTING TONE 2 ON 1 OFF ON OK 432 AUTO REDUCTI...

Page 99: ... 573 Remote turn on ring number set 00 99 10 OK 590 FAX auto redial time set 00 99 05 OK 591 FAX auto redial line disconnection time set 001 999sec 065 OK 592 CNG transmit select 1 OFF 2 ALL 3 AUTO ALL OK 593 Time between CED and 300bps 1 75ms 2 500ms 3 1sec 75ms OK 594 Overseas DIS detection select 1 1st 2 2nd 1st OK 595 Receive error limit value set 1 5 2 10 3 15 4 20 10 OK 596 Transmit level se...

Page 100: ...VICE FUNCTION TABLE P 86 for descriptions of the individual codes Example If you want to set value in the 401 PRINT SENDING REPORT press the dial key number 1 2 or 3 corresponding to the Set Value you want to select 1 ERROR 2 ON 3 OFF ...

Page 101: ...use different expressions for the same problem as they are not a technician or engineer Using your experience test the problem area corresponding to the claim Also returns from a customer or dealer often have a claim tag For these cases as well you need to determine the problem Test the unit using the simple check list on SIMPLE CHECK LIST P 103 Difficult problems may be hard to determine so repea...

Page 102: ...one is the short initialization about 3 seconds and the other is the long initialization about 10 seconds The short initialization makes the unit enter the standby mode The long initialization makes the unit enter the standby mode after cleaning or detecting the rest of toner ...

Page 103: ...103 KX MB771GR 12 3 4 SIMPLE CHECK LIST Note Check according to the service code referring to TEST FUNCTIONS P 81 ...

Page 104: ...e drum unit Dirty the pickup roller and the regist roller and the feed roller and the eject roller and the heat roller and the pressure roller Clean the pickup roller and the regist roller and the feed roller and the eject roller and the heat roller and the pressure roller Failed the high voltage terminal Check the high voltage terminal Failed the high voltage power supply board Go to HIGH VOLTAGE...

Page 105: ...bber Clean or replace the separation rubber Failed the gear Check the gear Failed the solenoid Check the solenoid Failed the engine motor Go to FB Flatbed MOTOR P 158 Failed the pickup sensor lever Check the pickup sensor lever Failed the pickup sensor Go to SENSOR SECTION P 155 5 THE RECORDING PAPER JAM P 124 PAPER JAMMED ON THE LCD Dirty or failed the pressure roller Clean or replace the pressur...

Page 106: ...the document guide Replace the document guide 3 THE SENT FAX DATA IS SKEWED P 129 The cause of ADF Go to SKEW ADF P 128 The cause of scanner glass Problem with the other FAX machine 4 THE RECEIVED FAX DATA IS SKEWED P 129 The cause of printing Go to SKEW ADF P 128 Problem with the other FAX machine 5 THE RECEIVED OR COP IED DATA IS EXPANDED P 129 Dirty or failed the document feed roller at ADF Cle...

Page 107: ...y the temperature control after reaching the second sta bilizing temperature 195 C 44h 200 C 40h 05 means that it did not reach the first stabilizing temperature 170 C 5Bh within 30 seconds from detection temperature 1 70 C D8h 06 means that it became 235 C 2Ah or over during printing 07 means that during printing the short of the thermistor AD 00h was detected 08 means that the thermistor s short...

Page 108: ...108 KX MB771GR 12 3 6 1 CALL SERVICE 1 CALL SERVICE 1 means that the polygon motor inside the LSU does not rotate The rotation of the polygon motor is detected by IC300 F23pin NREADY ...

Page 109: ...E 2 CALL SERVICE 2 means that the synchronous signal out of the LSU cannot be detected The synchronous signal out of the LSU is detected by IC 300 G23pin NHSYNC Note As for the Pulse waveform of the above flow chart see the timing chart ...

Page 110: ...e fuser does not rise up to or exceed a constant temperature The temperature is monitored with the thermistor inside the fuser and detected with the voltage input into IC 300 D19 When Call Service 3 is occurred the cause can be distinguished by service mode 655 Refer to P 107 for details ...

Page 111: ...does not run or the running of the FAN cannot be detected normally The running of the FAN is detected by IC300 AC20 and W24pin CALL SERVICE 4 is displayed when it detects NG three times continuously After repairing copy three times If CALL SERVICE 4 is displayed check again ...

Page 112: ...112 KX MB771GR 12 3 6 5 CALL SERVICE 5 CALL SERVICE 5 means that Engine DC motor s rotation detection signal LD does not become Low ...

Page 113: ...113 KX MB771GR 12 3 6 6 CALL SERVICE 6 CALL SERVICE 6 indicates that abnormal charge voltage is output from the high voltage unit ...

Page 114: ...114 KX MB771GR 12 3 7 PRINT 12 3 7 1 GHOST IMAGE CROSS REFERENCE HIGH VOLTAGE SECTION P 165 POWER SUPPLY BOARD SECTION P 62 ...

Page 115: ...115 KX MB771GR 12 3 7 2 DARK OR WHITE VERTICAL LINE Note When wiping the cover glass reflecting mirror use a dry and soft cloth ...

Page 116: ...116 KX MB771GR 12 3 7 3 DARK OR WHITE HORIZONTAL LINE CROSS REFERENCE HIGH VOLTAGE SECTION P 165 ...

Page 117: ...117 KX MB771GR 12 3 7 4 DIRTY OR HALF DARKNESS BACKGROUND CROSS REFERENCE HIGH VOLTAGE SECTION P 165 ...

Page 118: ...118 KX MB771GR 12 3 7 5 BLACK PRINT CROSS REFERENCE HIGH VOLTAGE SECTION P 165 LSU Laser Scanning Unit SECTION P 40 ...

Page 119: ...119 KX MB771GR 12 3 7 6 LIGHT PRINT CROSS REFERENCE HIGH VOLTAGE SECTION P 165 ...

Page 120: ...120 KX MB771GR 12 3 7 7 BLACK OR WHITE POINT 12 3 8 RECORDING PAPER FEED 12 3 8 1 MULTIPLE FEED ...

Page 121: ...121 KX MB771GR 12 3 8 2 THE RECORDING PAPER IS WAVED OR WRINKLED ...

Page 122: ...122 KX MB771GR 12 3 8 3 SKEW ...

Page 123: ...123 KX MB771GR 12 3 8 4 THE RECORDING PAPER DOES NOT FEED CROSS REFERENCE SENSOR SECTION P 155 MOTOR SECTION P 157 ...

Page 124: ...124 KX MB771GR 12 3 8 5 THE RECORDING PAPER JAM ...

Page 125: ...h of the Resistance sensor 3 The paper exit was not detected after the registration 4 The paper was longer than the maximum length of the paper exit sensor 5 The Resistance Manual paper sensor or paper exit sensor was turned ON before the motor started to rotate 6 The Resistance Manual paper sensor chattered 7 The sorter enter sensor chattered 12 3 8 6 BACK SIDE OF THE RECORDING PAPER IS DIRTY CRO...

Page 126: ...126 KX MB771GR 12 3 9 ADF Auto Document Feeder SECTION 12 3 9 1 NO DOCUMENT FEED DOCUMENT JAM and MULTIPLE DOCUMENT FEED CROSS REFERENCE SENSOR SECTION P 155 ...

Page 127: ...127 KX MB771GR CROSS REFERENCE MOTOR SECTION P 157 ...

Page 128: ...128 KX MB771GR 12 3 9 2 SKEW ADF ...

Page 129: ...129 KX MB771GR 12 3 9 3 THE SENT FAX DATA IS SKEWED CROSS REFERENCE SKEW ADF P 128 12 3 9 4 THE RECEIVED FAX DATA IS SKEWED CROSS REFERENCE SKEW P 122 12 3 9 5 THE RECEIVED OR COPIED DATA IS EXPANDED ...

Page 130: ...130 KX MB771GR 12 3 9 6 BLACK OR WHITE VERTICAL LINE IS COPIED ...

Page 131: ...131 KX MB771GR 12 3 10 AN ABNORMAL IMAGE IS COPIED CROSS REFERENCE CIS CONTROL SECTION P 161 ...

Page 132: ...ls another Copying is also possible Troubleshooting Problem with the service line or with the transmitter s fax Refer to RECEIVE PROBLEM P 135 4 The fax completely fails to transmit or receive Copying is also possible Troubleshooting Problem with the electric circuit Refer to THE UNIT CAN COPY BUT CANNOT TRANSMIT RECEIVE P 136 5 The fax fails either to transmit or receive when making a long distan...

Page 133: ...KX MB771GR 12 3 11 1 DEFECTIVE FACSIMILE SECTION 12 3 11 1 1 TRANSMIT PROBLEM CROSS REFERENCE CLEANING THE WHITE PLATE AND GLASSES P 212 ADF Auto Document Feeder SECTION P 126 OPERATION PANEL SECTION P 154 ...

Page 134: ...2 SOMETIME THERE IS A TRANSMIT PROBLEM Note 596 Transmit level set represents a service code Refer to the SERVICE FUNCTION TABLE P 86 717 Transmit speed select represents a service code Refer to the SERVICE FUNCTION TABLE P 86 ...

Page 135: ...ceiving problem we have thought of causes other than in the software Some causes may be when the fax changes to the memory receiving mode for example when out of paper and the memory becomes full of the unprinted fax data In this case MEMORY FULL and its main cause for example OUT OF PAPER are displayed on the LCD Accordingly by solving the main problem MEMORY FULL can be canceled and the receivin...

Page 136: ...136 KX MB771GR 12 3 11 1 4 THE UNIT CAN COPY BUT CANNOT TRANSMIT RECEIVE CROSS REFERENCE TEST FUNCTIONS P 81 CHECK SHEET P 151 ...

Page 137: ...gives you basic information about a communication but the other two journal reports provide different information on the same item communication HOW TO READ JOURNAL REPORTS Example 1 Look at NO 01 in the JOURNAL If you want to know about the details about that item see NO 01 in the JOURNAL 2 and the JOURNAL 3 You can get the following information MODE Fax transmission RCV MODE TEL TX SPEED 9 6 kbp...

Page 138: ...ntheses indicate how many times the trigger has been used For example 0003 means three times 5 ERROR MEMORY Indicates the reason why the unit received a fax message in memory If you look at No 11 in the JOURNAL 2 in PRINTOUT EXAMPLE P 139 it shows the fax message was received in memory due to PAPER OUT error NO RESPONSE DISAPPEARED ON JOURNAL The NO RESPONSE DISAPPEARED ON JOURNAL displays the inf...

Page 139: ...m Scan Line Time Used only at the factory 8 EQM EQM means Eye Quality Monitor Used only at the factory 9 ERROR LINE RX When an error occurs while receiving a fax this shows the number of error lines 10 MAKER CODE This shows a 2 digit code of the other party s fax machine brand 0E KX model 00 Unknown 79 UF model 19 Xerox model 12 3 12 3 PRINTOUT EXAMPLE ...

Page 140: ...140 KX MB771GR ...

Page 141: ...ND No response after post message is transmitted three times 4 44 COMMUNICATION ERROR SND RTN and PIN are received 5 46 COMMUNICATION ERROR RCV No response after FTT is transmitted 6 48 COMMUNICATION ERROR RCV No post message 7 49 COMMUNICATION ERROR RCV RTN is transmitted 8 50 COMMUNICATION ERROR RCV PIN is transmitted to PRI Q 8 51 COMMUNICATION ERROR RCV PIN is transmitted 8 52 COMMUNICATION ER...

Page 142: ...142 KX MB771GR ...

Page 143: ...143 KX MB771GR CROSS REFERENCE TEST FUNCTIONS P 81 ...

Page 144: ...144 KX MB771GR CROSS REFERENCE TEST FUNCTIONS P 81 ...

Page 145: ...145 KX MB771GR CROSS REFERENCE TEST FUNCTIONS P 81 ...

Page 146: ...146 KX MB771GR CROSS REFERENCE TEST FUNCTIONS P 81 ...

Page 147: ...147 KX MB771GR ...

Page 148: ...148 KX MB771GR ...

Page 149: ...149 KX MB771GR CROSS REFERENCE TEST FUNCTIONS P 81 ...

Page 150: ...ed on the SOC IC300 initializes and checks each IC The ROM IC402 and SDRAM IC400 are checked If initialization fails for the ICs the system will not boot up In this case please find the cause as follows CROSS REFERENCE NG EXAMPLE P 227 POWER SUPPLY BOARD SECTION P 62 ...

Page 151: ...ndset microphone and the signal is output to the telephone line The signal mainly flowing on this route is analog You can trace the signal with an oscilloscope The signal flow on each route is shown in the Check Sheet here If you find a specific problem in the unit for example if you cannot communicate with the H S trace that signal route locally with the following Check Sheet and locate the fault...

Page 152: ...ars on each route between the handset microphone and telephone line sending or between the telephone line and the handset speaker receiv ing or between the microphone and the telephone line sending or between the telephone line and the speaker receiving Check the components at that point CHECK SHEET P 151 is useful for this investigation 2 No pulse dialing 3 No ring tone or No bell CROSS REFERENCE...

Page 153: ...T P 151 12 3 14 3 DETECTIVE TAM INTERFACE SECTION 1 The FAX turns on but does not arrive through TAM CROSS REFERENCE TAM INTERFACE SECTION P 28 2 A FAX is received but won t switch from TAM to FAX CROSS REFERENCE ANALOG SECTION P 151 TAM INTERFACE SECTION P 28 ...

Page 154: ...154 KX MB771GR 12 3 15 OPERATION PANEL SECTION Refer to TEST FUNCTIONS P 81 1 NO KEY OPERATION 2 NO LCD INDICATION CROSS REFERENCE TEST FUNCTIONS P 81 ...

Page 155: ...rcuit description Perform an SENSOR CHECK to determine if the sensor is operating correctly 1 Check the pickup sensor FAILED PICKUP 2 Check the paper exit sensor PAPER JAMMED 3 Check the read position sensor CHECK DOCUMENT 4 Check the registration manual paper sensor PAPER JAMMED ...

Page 156: ...R 5 Check the print timing sensor PAPER JAMMED 6 Check the document sensor 7 Check the top cover sensor TOP COVER OPEN 8 Check the toner sensor TONER LOW CHANGE DRUM CROSS REFERENCE SENSORS AND SWITCHES SECTION P 42 ...

Page 157: ...157 KX MB771GR 12 3 17 MOTOR SECTION 12 3 17 1 ENGINE MOTOR ...

Page 158: ...158 KX MB771GR 12 3 17 2 FB Flatbed MOTOR ...

Page 159: ...159 KX MB771GR 12 3 17 3 ADF MOTOR ADF provided model only ...

Page 160: ...160 KX MB771GR 12 3 18 LSU SECTION CROSS REFERENCE LSU Laser Scanning Unit SECTION P 40 ...

Page 161: ...161 KX MB771GR 12 3 19 CIS CONTROL SECTION ...

Page 162: ...162 KX MB771GR CROSS REFERENCE TEST FUNCTIONS P 81 ...

Page 163: ... output at that moment Avoid mea suring then 7 The unit enters the service mode Then push 628_0 Do not push the SET button 8 Push the SET button High voltage will be added to the unit in the hereafter Avoid touching the wire and the tip of high voltage probe where high voltage is supplied 9 When the measurement is finished push the STOP button The high voltage output is stopped 10 Remove the wire ...

Page 164: ...164 KX MB771GR ...

Page 165: ...165 KX MB771GR 12 3 21 HIGH VOLTAGE SECTION 1 Main ...

Page 166: ...166 KX MB771GR 2 CHG GRID 3 TRA ...

Page 167: ...167 KX MB771GR 3 DEV DC TRA ...

Page 168: ...168 KX MB771GR 12 3 22 USB SECTION Troubleshooting 1 Confirmation of the PC settings ...

Page 169: ...169 KX MB771GR 2 Confirmation of the main unit ...

Page 170: ...ram Sequence of normal operation When USB cable from PC is connected to CN300 VBUS voltage goes up to 5V and IC300 recognize the connection with PC Then D becomes about 3V waveform 1 1 The D becomes 0V then communication between IC300 and PC is started waveform 2 1 When a few seconds elapsed after USB cable was inserted into CN300 the unit enters stand by mode When PC is at Hi Speed waveforms are ...

Page 171: ...171 KX MB771GR Waveform of normal operation ...

Page 172: ...172 KX MB771GR 12 3 23 MAIN BOARD SECTION 3 3V TROUBLESHOOTING GUIDE ...

Page 173: ...173 KX MB771GR 1 2V TROUBLESHOOTING GUIDE ...

Page 174: ...voltage test with standing voltage test intentional short circuit test etc Caution If you find a melted fuse in the unit do not turn on the power until you located and repair the faulty parts except for the fuse otherwise the fuse will melt again and you cannot pinpoint the faulty point In most cases the symptom is that nothing is output It is more likely that the fault is in the primary side rath...

Page 175: ...S REPAIR DETAILS D10 D13 Check for a short circuit in terminal 4 If D10 D13 is short circuit F2 will melt open In this case replace all of the parts D10 D13 F2 D101 If D101 is broken the oscillation circuit in the power supply cannot operate Check it with an electric tester ...

Page 176: ...NT FEEDER Caution Do not pull out the jammed document forcibly before lifting the ADF cover 1 Open the ADF cover 1 while holding the document cover 2 2 Remove the jammed document 3 carefully When the document has jammed near the document entrance ...

Page 177: ...177 KX MB771GR When the document has jammed near the document exit 3 Close the ADF cover ...

Page 178: ... the following Caution Do not pull out the jammed paper forcibly before opening the top cover Case 1 When the recording paper has jammed near the manual input tray 1 Pull open the paper input tray 1 2 Open the manual input tray 2 and remove the jammed paper 3 carefully by pulling it upwards Then close the manual input tray ...

Page 179: ...lose the top cover 4 to clear the error message Case 2 When the recording paper has jammed near the drum and toner unit 1 Pull open the paper input tray 1 2 Lift the top cover release lever 2 and open the top cover 3 Note Do not touch the transfer roller 5 ...

Page 180: ...180 KX MB771GR 3 Remove the jammed paper 6 carefully by pulling it upwards Remove the jammed paper 7 carefully by pulling it toward you 4 Close the paper input tray ...

Page 181: ...ed Caution To prevent injuries be careful not to put your hands under the top cover Case 3 When the recording paper has jammed near the fuser unit 1 Lift the top cover release lever 1 and open the top cover 2 Note Do not touch the transfer roller 4 ...

Page 182: ...182 KX MB771GR 2 Lift both green levers 5 until they stop 3 Remove the jammed paper 6 carefully by pulling it upwards 4 Push back the green levers 7 to the original position ...

Page 183: ...183 KX MB771GR 5 Close the top cover until locked ...

Page 184: ...the recording paper specifications and re install recording paper 1 Pull the paper input tray until it clicks into place then put it com pletely out lifting the front part of the tray Remove the recording paper and straighten 2 Re load the recording paper 3 Insert the paper input tray to the unit lifting the front part of the tray Then push it completely into the unit ...

Page 185: ...l input tray is not fed into the unit properly The display will show the following Note If the error message is still displayed check the recording paper specifications and re install recording paper 1 Remove the recording paper 2 Re insert the recording paper ...

Page 186: ...186 KX MB771GR 13 Service Fixture Tools ...

Page 187: ...187 KX MB771GR 14 Disassembly and Assembly Instructions Note Remove the Document Cover the Paper Input tray and the drum and toner cartridge before reassembling ...

Page 188: ...188 KX MB771GR 14 1 ADF SECTION ...

Page 189: ...189 KX MB771GR 14 2 REMOVE ADF SECTION 1 ...

Page 190: ...190 KX MB771GR 14 3 REMOVE ADF SECTION ...

Page 191: ...191 KX MB771GR 14 4 REMOVE TOP COVER SECTION ...

Page 192: ...192 KX MB771GR 14 5 REMOVE SCANNER GLASS SECTION ...

Page 193: ...193 KX MB771GR 14 6 REMOVE OPERATION PANEL SECTION ...

Page 194: ...194 KX MB771GR 14 7 LEFT SIDE SECTION 14 8 REMOVE MAIN BOARD ...

Page 195: ...195 KX MB771GR 14 9 REMOVE GEAR CHASSIS SECTION ...

Page 196: ...196 KX MB771GR 14 10 REMOVE PAPER FEED ROLLER 14 11 RIGHT SIDE SECTION ...

Page 197: ...197 KX MB771GR 14 12 REMOVE RIGHT SIDE COVER SECTION ...

Page 198: ...198 KX MB771GR 14 13 LOWER SIDE CABINET SECTION ...

Page 199: ...199 KX MB771GR 14 14 REMOVE RIGHT CASSETTE GUIDE 14 15 REMOVE PICK UP BOARD ...

Page 200: ...200 KX MB771GR 14 16 REMOVE HIGH VOLTAGE POWER BOARD ...

Page 201: ...201 KX MB771GR 14 17 REMOVE PICK UP ROLLER UNIT ...

Page 202: ...202 KX MB771GR 14 18 REMOVE LOW VOLTAGE POWER BOARD ...

Page 203: ...203 KX MB771GR 14 19 REMOVE FUSER UNIT ...

Page 204: ...204 KX MB771GR 14 20 Installation Position of The Lead 14 20 1 MAIN BAORD SECTION ...

Page 205: ...205 KX MB771GR 14 20 2 BOTTOM PART SECTION ...

Page 206: ...206 KX MB771GR 14 20 3 SIDE CABINET SECTION ...

Page 207: ...207 KX MB771GR 14 20 4 HIGH VOLTAGE POWER SUPPLY BOARD SECTION ...

Page 208: ...208 KX MB771GR 14 20 5 LOW VOLTAGE POWER SUPPLY BOARD SECTION ...

Page 209: ...209 KX MB771GR 14 20 6 AC INLET SECTION 14 20 7 SOLENOID LEAD SECTION ...

Page 210: ...nd communication testing to determine if the problem originates from the transmitter receiver or the telephone line 4 Determine causes Determine the causes of the equipment problem by troubleshooting 5 Equipment repairs Repair or replace the defective parts and take appropriate measures at this stage to ensure that the problem will not recur 6 Confirm normal operation of the equipment After comple...

Page 211: ...cle Procedure 1 ADF Document Feed Roller Ref No 116 3 months 5 years 65 000 documents Refer to REMOVE ADF SECTION P 190 ADF SECTION P 254 2 ADF Separation Rubber Ref No 103 3 months 5 years 65 000 documents Refer to REMOVE ADF SECTION P 190 ADF SECTION P 254 3 ADF Eject Roller Ref No 121 3 months 5 years 65 000 documents Refer to REMOVE ADF SECTION P 190 ADF SECTION P 254 4 Pick up Roller Ref No 2...

Page 212: ... document the scanned data or the fax document received by the other party Caution Be careful when handling the drum and toner unit Do not use paper products such as paper towels or tissues to clean the inside of the unit 15 2 1 1 White plate and scanner glasses 1 Open the document cover 1 2 Hold the document cover 2 while cleaning the white plate 3 and the scanner glasses 4 3 Close the document c...

Page 213: ... 1 Disconnect the power cord 2 Lift the top cover release lever 1 and open the top cover 2 Note Do not touch the transfer roller 4 3 Remove the drum and toner unit 5 by holding the tabs 4 Clean the lower glass 6 with a soft and dry cloth ...

Page 214: ...214 KX MB771GR 5 Reinstall the drum and toner unit 7 by holding the tabs Make sure that the triangles 8 match to install the drum and toner unit correctly 6 Close the top cover until locked ...

Page 215: ...215 KX MB771GR Caution To prevent injuries be careful not to put your hands under the top cover 7 Re connect the power cord ...

Page 216: ... recording paper frequently misfeeds 1 Disconnect the power cord 2 Open the ADF cover 1 while holding the document cover 2 3 Clean the document feeder rollers 3 with a cloth moistened with iso propyl rubbing alcohol and let all parts dry thoroughly 4 Close the ADF cover 5 Re connect the power cord ...

Page 217: ...rum a fixed electric potential The sensitive drum is the Organic Photo Conductor OPC which is a electric conductive cylinder whose surface is covered with the Charge Generation Transfer Layer CGTL When the charging bias DC 4 35kv is added and the plus charge is supplied to the OPC surface while charging the whole sur face potential of the drum is 475V Charging Part ...

Page 218: ...arge Generation Transfer Layer which conducts the minus charge the plus charged drum s surface is neutralized to be skipped Then the plus charge goes to the ground from the electric conductive cylinder Consequently the charge of the part which is not exposed remains as it is and the electric potential of the scanned part changes At that time an invisible image is created on the drum Exposing Part ...

Page 219: ... the potential difference causes to send the toner to the developing roller from the toner supply roller The supplied toner to the developing roller is kept to a certain layer thickness by the developing blade and also it is charged by triboelectricity Consequently the toner is transferred to the surface of the exposed OPC drum by the potential difference between the developing roller and OPC drum...

Page 220: ...ns The cleaning is the stage that cleans the remain toner after the transcription stage The remain toner on the drum and the toner which was attached to the place where the laser beam didn t scan are gathered to the developing roller to be used again After paper jam or replacing toner and drum unit the transfer roller is plus charged to eliminate the plus charged toner Cleaning Part ...

Page 221: ...ler is rosined by Teflon and lubri cated to prevent from attaching the toners The press roller is made of silicon and its spring compresses the melted toner Fixing Part The fixing part becomes high temperature so the thermistor and the two thermostats are provided 1 Thermistor The thermistor touches the heat roller and check the temperature to feed back to the control circuit The surface temperatu...

Page 222: ...222 KX MB771GR 15 4 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 15 4 1 MAIN BOARD 1 ...

Page 223: ...223 KX MB771GR 15 4 2 MAIN BOARD 2 15 4 3 OPERATION BOARD ...

Page 224: ...Flux Recommended Flux Specific Gravity 0 82 Type RMA lower residue non cleaning type Note See ABOUT LEAD FREE SOLDER PbF Pb free P 5 15 5 2 FLAT PACKAGE IC REMOVAL PROCEDURE 1 Put plenty of solder on the IC pins so that the pins can be completely covered Note If the IC pins are not soldered enough you may give pressure to the P C board when cutting the pins with a cutter 2 Make a few cuts into the...

Page 225: ...f the IC setting with the corresponding soldering foil 2 Apply flux to all pins of the FLAT PACKAGE IC 3 Solder the pins sliding the soldering iron in the direction of the arrow 15 5 4 BRIDGE MODIFICATION PROCEDURE 1 Lightly resolder the bridged portion 2 Remove the remaining solder along the pins using a soldering iron as shown in the figure below ...

Page 226: ...s tests are applied and any mal functions are analyzed In past experiences digital IC especially DRAM and ROM malfunctions are extremely rare after installation in the product This may be repaired by replacing the IC DRAM etc However the real cause may not have been an IC malfunction but a sol dering fault instead Soldering faults difficult to detect with the naked eye are common particularly for ...

Page 227: ...227 KX MB771GR 15 6 1 NG EXAMPLE ...

Page 228: ...228 KX MB771GR 15 7 TEST CHART 15 7 1 ITU T No 1 TEST CHART ...

Page 229: ...229 KX MB771GR 15 7 2 ITU T No 2 TEST CHART ...

Page 230: ...agram 16 1 For Schematic Diagram Note 1 DC voltage measurements are taken with an oscilloscope or a tester with a ground 2 The schematic diagrams and circuit board may be modified at any time with the development of new technology 3 ...

Page 231: ...231 KX MB771GR MEMO ...

Page 232: ... C18 FRMA9 A19 FRMA10 A21 FRMA11 B21 FRMA12 D21 FRMA13 C21 FRMA14 A22 FRMA15 B22 FRMA16 A23 FRMA17 C22 FRMA18 B23 FRMA19 A24 FRMA20 B24 FRMA21 A25 FRMA22 C23 FRMA23 E24 FRMA24 A13 NFRCE B13 NFROE C13 NFRWE L4 SDMA0 L3 SDMA1 J4 SDMA2 J3 SDMA3 AC3 SDMA4 AB3 SDMA5 AA4 SDMA6 AA3 SDMA7 Y3 SDMA8 A14 FRMD0 B14 FRMD1 C14 FRMD2 A15 FRMD3 B15 FRMD4 W4 SDMA9 M3 SDMA10 W3 SDMA11 V4 SDMA12 IC300 U24 IO0 U25 IO...

Page 233: ...AE6 TX_CLKI AF6 TX_EN AC7 TXD0 AD7 TXD1 AE7 TXD2 AF7 TXD3 AC8 TX_ER AE8 RX_CLKI AD8 RX_DV AF8 RXD0 AC9 RXD1 AD9 RXD2 AE9 RXD3 AD10 RX_ER AF9 MDIO AE10 MDC AF10 MGTINT AF18 LSI_TCK AD16 LSI_TRSTN AF17 LSI_TMS AE17 LSI_TDI AC16 LSI_SCAN_ENABLE AC19 LSI_TN AF19 LSI_CW_TAP AE18 LSI_PROCMON AD17 LSI_TDO AE19 LSI_IDDT C2 AFEADC1 D3 AFEADC2 C1 AFEADC3 D2 AFEADC4 D1 AFEADC5 E3 AFEADC6 E2 AFEADC7 F3 AFESIF...

Page 234: ... K Q300 B C E D305 A K IC302 1 SW 2 VIN 3 ROSC 4 GND 5 SS EN 6 COMP 7 FB 8 BST 9 PAD Z0 1u C660 5VD Z0 1u C655 Z0 1u C689 Z0 1u C668 Z0 1u C662 Z0 1u C674 Z0 1u C675 Z0 1u C656 Z0 1u C670 Z0 1u C666 Z0 1u C690 Z0 1u C667 Z0 1u C676 Z0 1u C677 24V Z0 1u C696 Z0 1u C645 Z0 1u 50V C672 Z0 1u C665 Z0 1u C679 3 3V Z0 1u C647 Z0 1u C658 Z0 1u C653 Z0 1u C693 Z0 1u C652 Z0 1u C697 3 3V Z0 1u C663 Z0 1u C...

Page 235: ...235 KX MB771GR MEMO ...

Page 236: ...14 IC400 1 VDD 2 DQ0 3 VDDQ 4 DQ1 5 DQ2 6 VSSQ 7 DQ3 8 DQ4 9 VDDQ 10 DQ5 11 DQ6 12 VSSQ 13 DQ7 14 VDD 15 LDQM 16 WE 17 CAS 18 RAS 19 CS 20 BA0 21 BA1 22 A10 AP 23 A0 24 A1 25 A2 26 A3 27 VDD 28 VSS 29 A4 30 A5 31 A6 32 A7 33 A8 34 A9 35 A11 36 A12 37 CKE 38 CLK 39 UDQM 40 NC RFU 41 VSS 42 DQ8 43 VDDQ 44 DQ9 45 DQ10 46 VSSQ 47 DQ11 48 DQ12 49 VDDQ 50 DQ13 51 DQ14 52 VSSQ 53 DQ15 54 VSS J100p C429 3...

Page 237: ...0 26 LED0 TEST 27 LED1 SPD100 FEF 28 LED2 DUPLEX 29 LED3 NWAYEN 30 PD 31 VDDRX 32 RX 33 RX 34 FXSD FXEN 35 GND4 36 GND5 37 REXT 38 VDDRCV 39 GND6 40 TX 41 TX 42 VDDTX 43 GND7 44 GND8 45 XO 46 XI 47 VDDPLL 48 RST C755 NC R762 NC R763 NC R764 NC COL 1 4B R765 NC K0 01u 50V C706 NC R702 24V K1000p C711 R708 F0 82 3216 ADFMEN 1 1D CRM0 1 1D 3 6E K1000p C710 CRM5 1 1D 3 6E CRM2 1 1D 3 6E K1000p C712 CR...

Page 238: ...0k R522 Z1u C513 CN505 AP1 1 CVR 2 HVERR 3 TRS 4 DEV 5 CHG 6 GND 7 24V CN508 1 POUT 2 5V 3 THRM1 4 GND 5 FANON 6 FANDET 7 PICK 8 TNR 9 PTOP 10 REG Z0 1u C555 THRMSTR0 1 1E K1000p C548 R591 NC OPERST 1 3E 100 R559 KSCLK 1 3E KSTART 1 3E F18k R564 5VD KTXD 1 3E 100 R563 J180p C557 AP1 CN511 1 THRM 2 KSTART 3 KTXD 4 KSCLK 5 OPERST 6 GND 7 5V 8 BUZZER NC 3 3V 1k R562 DAOUT 1 1E 4 1D 1k R561 180 R560 4...

Page 239: ... C525 NC R535 AP1 CN509 1 CR_A 2 CR_B 3 CR_XA 4 CR_XB CRM3 1 1D 2 6B CRM0 1 1D 2 6B Z0 1u C567 K1u C509 CRM1 1 1D 2 6B K0 01u 50V C522 CRMEN 1 1E K1000p C527 Z0 1u C566 1k R533 K1000p C528 24V K0 01u 50V C520 K1000p C529 K1000p C526 3 3V CRM4 1 1D 2 6B CCDCLK 1 6A J100p C547 10k R534 R537 F1 3216 R536 F1 3216 MVREF 2 6B 1k R538 K0 01u C546 K0 01u C544 10k R539 1 2 1608 R548 27 R553 IC502 1 VM1 2 N...

Page 240: ...M 2125 R106 DG K0 1u C205 L215 C202 NC AFECLK 1 4B 1E DG DG2 R211 NC BBITCLK 1 4A 180k R222 IC203 NC 1 CD 2 FC2 3 FC1 4 VIN 5 VO1 6 VCC 7 GND 8 VO2 3 3V DG 3 3VA1 C221 NC K0 1u C208 DG ATXD 1 4A R221 NC BRXD 1 4A 150k R201 K1000p C213 C218 NC C219 NC AFERST 1 4A 1C 3 3VA1 DG 50V 1u C106 3 3VA2 DG AFERST 1 4A 1E DG DG K0 1u C245 L213 NC L214 NC L229 NC L230 NC 3 3k R245 R130 NC C123 NC F536 3216 R1...

Page 241: ...8 NC 5VD L226 D103 4 1 3 2 R233 NC L216 NC K0 01u C112 C230 NC C228 NC C243 NC R252 NC DG L100 L101 L106 L102 RLY101 NC 1 2 3 4 5 L103 L105 D200 NC 1 2 3 DG L232 NC L233 NC C126 NC K0 01u C125 L234 NC L235 NC 1mH L111 1mH L110 DG2 D102 250V0 01u C113 L F L238 NC 1 4 3 2 C246 NC L107 2 3 1 4 L237 NC R125 NC R122 NC R131 NC R133 NC L223 NC L221 NC L224 NC L222 NC SA101 1000V L239 NC L240 NC R123 NC ...

Page 242: ...3 5VD DG3 4 7 R8 DG1 DG2 DG2 DG2 DG1 5VD DG1 DG1 DG3 5VD DG3 5VD DG1 DG2 K390p C6 K390p C7 K0 01u C8 K1500p C21 K1500p C22 K2700p C20 SW54 R SW4 SW23 S3 SW3 SW52 D SW10 ZOOM SW43 S3 R SW53 R SW48 SW21 SW51 D SW1 SW24 SW50 SW11 SW49 CONTRASTR SW2 RESOLUTION SW47 SW20 COLLATE SW46 SW19 S2 SW44 SW18 S1 SW45 S1R SW26 AUTO ANSWER SW41 AUTO ANSWER R SW22 FAX SW40 SW7 SCAN SW38 SW5 COPY SW39 CN2 PB1 1 TH...

Page 243: ... VREF CN61 5 CNT CN61 6 SI CN61 7 DG CN61 8 CLK CN61 9 VLED CN61 10 G CN61 11 R CN61 12 B J51 J57 J56 J55 NC C50 NC C51 J52 FG_DEV FG_EARTH J53 J50 SW50 PB1 NC 4 3 1 2 PS50 2 1 4 3 PS52 2 1 4 3 PS51 2 1 4 3 IC50 3 OUTPUT 2 GND 1 VCC PS53 2 1 4 3 PS54 2 1 4 3 CN64 1 POUT 2 5V 3 THRM1 4 GND 5 FANON 6 FANDET 7 PICK 8 TNR 9 PTOP 10 REG CN65 1 THRM1 2 5V 3 POUT 4 GND CN66 1 5V 2 REG 3 PTOP 4 GND CN67 1...

Page 244: ...244 KX MB771GR MEMO ...

Page 245: ...318 RA320 C544 C545 C536 C542 C540 C543 C537 L365 L366 L368 L371 B1 A2 AE1 AF2 A25 C411 C400 C401 R401 IC300 R409 X303 32 768 R346 C310 R384 C311 AF25 C313 1 2V C384 1 4 5 8 Q303 C386 C414 C402 C403 C405 C406 C413 C412 27 1 28 54 IC400 C404 C407 R410 3 3V BATT BAT300 R450 C488 J300 LED750 R755 10 1 2 CN750 9 7 8 6 5 8 7 L399 4 1 3 2 C312 C320 CN300 C755 C762 L753 L752 R754 R752 R753 IC750 36 25 24...

Page 246: ...1 C304 L346 L344 R306 L369 L370 C328 L504 C551 C553 C531 C530 C554 DA500 3 3V BATT C323C322 C319 R388 R389 DA300 IC303 C766 C765 C764 C763 C759 C760 R756 C751 C752 C758 2 1 10 9 7 8 R344 1 2V BATT C327 C355 R393 RESET TCK TDO TDI TMS TRSTN R403 R400 R407 R406 R405 R404 R402 R408 C409 C408 C410 C330 C357 C352 C360 C354 R302 R591 C558 M TCK M TRSTN M TDI M TMS M TDO R380 C334 C363 C333 C361 EYEDAT E...

Page 247: ...ESOLUTION CONTRAST ZOOM N in 1 LOWER SET MONITOR FLASH REDIAL 1 2 5 6 3 STOP START 8 9 0 4 7 CALLER ID MENU PbF PFUP1658Z A S1 S2 S3 FAX SW26 SW41 SW22 SW40 SW18 SW45 SW19 SW44 SW23 SW43 SW39 SW20 SW46 SW2 SW47 SW11 SW49 SW10 SW48 SW24 SW50 SW51 SW1 SW54 SW3 SW53 SW12 SW9 SW31 SW36 SW17 SW30 SW35 SW16 SW27 SW32 SW13 SW29 SW34 SW15 SW8 SW6 SW55 SW57 SW56 SW28 SW33 SW14 SW52 SW25 SW4 SW37 SW21 SW38 ...

Page 248: ...248 KX MB771GR 17 2 2 OPERATION BOARD BOTTOM VIEW PbF PFUP1658Z 1 10 CN1 1 8 CN2 KX MB771GR OPERATION BOARD BOTTOM VIEW ...

Page 249: ... 4 A PFUP1659Z A PbF IC50 C52 1 1 CN67 CN65 4 1 1 10 CN64 5 4 CN66 AUTO CH A PFUP1659Z A PbF J58 J59 KX MB771GR TONER SENSOR BOARD PFUP1659Z B A PbF 1 3 1 4 C61 R54 AUTO CH PS50 CN53 PFUP1659Z B A PbF 1 3 CN52 1 4 KX MB771GR FUSER SENOSR BOARD 1 5 1 3 PFUP1659Z C A PbF 1 CN51 CN63 J50 5 1 3 PFUP1659Z C A PbF SW50 KX MB771GR PICKUP SENSOR BOARD ...

Page 250: ...ON BOARD 17 3 5 VARISTOR SENSOR BOARD 1 4 PFUP1659Z D A PbF R50 R51 C50 C51 1 4 CN50 AUTO CH PS51 PS52 PFUP1659Z D A PbF KX MB771GR REGISTRATION BOARD A PFUP1659Z E PbF J51 J52 A PFUP1659Z E PbF ZNR50 KX MB771GR VARISTOR SENSOR BOARD ...

Page 251: ... 1 CN60 CN59 CN61 J53 12 2 1 11 PFUP1659Z F A PbF CN62 4 1 KX MB771GR FLATBED RELAY BOARD A PFUP1659Z G PbF 1 4 C56 R53 R52 C55 AUTO CH A PFUP1659Z G PbF PS54 PS53 1 4 CN56 J55 J57 J56 KX MB771GR ADF SENSOR BOARD 1 1 8 2 A PFUP1659Z H PbF 8 7 2 1 6 5 L51 L50 L52 C54 L53 C53 CN55 CN57 1 1 8 CN58 J61 J60 2 A PFUP1659Z H PbF 8 7 2 1 6 5 KX MB771GR HANDSET RELAY BOARD ...

Page 252: ...252 KX MB771GR 18 Exploded View and Replacement Parts List 18 1 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 18 1 1 OPERATION PANEL SECTION ...

Page 253: ...253 KX MB771GR 18 1 2 TOP COVER SECTION ...

Page 254: ...254 KX MB771GR 18 1 3 ADF SECTION ...

Page 255: ...255 KX MB771GR 18 1 4 MOTOR SECTION ...

Page 256: ...256 KX MB771GR 18 1 5 LOWER CABINET SECTION ...

Page 257: ...257 KX MB771GR 18 1 6 UPPER CABINET SECTION ...

Page 258: ...258 KX MB771GR 18 1 7 FUSER SECTION ...

Page 259: ...259 KX MB771GR 18 1 8 LOWERSIDE CABINET ...

Page 260: ...260 KX MB771GR 18 1 9 GEAR SECTION 1 ...

Page 261: ...261 KX MB771GR 18 1 10 GEAR SECTION 2 ...

Page 262: ...262 KX MB771GR 18 1 11 CASSETTE OUTPUT TRAY ...

Page 263: ...263 KX MB771GR 18 1 12 ACTUAL SIZE OF SCREWS AND WASHERS ...

Page 264: ...264 KX MB771GR 18 1 13 ACCESSORIES AND PACKING MATERIALS ...

Page 265: ...1642Y COIL SPRING 23 PFUS1344Z COIL SPRING 24 PFDC1005Y GUIDE POM 25 PFJS12M80Y LEAD WIRE 26 PQLB1E1 INSULATOR 27 PFJS04M74Z LEAD WIRE 28 PFJE1068Z LEAD WIRE 29 PFDF1188Z SHAFT 30 PFDV1005Z ANGULAR BELT 31 PFUS1817Z COIL SPRING 32 PFHE1319Z PLASTIC PARTS 33 PFHX2134Z PLASTIC PARTS 34 PFUS1819Z TORSION SPRING 35 WLL20YG18M3M LEAD WIRE 36 PFKM1228Y1 CABINET BODY PS 37 PFJS08M78Z LEAD WIRE 38 PF0G101...

Page 266: ...M75Z LEAD WIRE 189 PFQT2643Z INDICATION PLATE LABEL 190 PFJS02M95Z LEAD WIRE 191 PFJS07M82Z LEAD WIRE Ref No Part No Part Name Description Remarks 192 PFJS05M76Z LEAD WIRE 193 PFUV1111Z COVER PS 194 PFJS04M72Z LEAD WIRE 195 PFDE1252Z LEVER POM 196 PFJS10M79Z LEAD WIRE 197 WLL20YG24M3M LEAD WIRE 198 PFUS1811Z COIL SPRING 199 PFUS1612Z COIL SPRING 200 PFUE1045Z LEVER PS 201 PFUS1916Z TORSION SPRING ...

Page 267: ...SPRING 337 PFDE1304Z ANGLE POM 338 PFKM1227Y1 CABINET BODY PS 339 K2AH3G000011 JACK 340 PQMX10010Z COVER 341 PQHR945Z BAND 342 PQLB1E1 INSULATOR 343 WLR18YK39CM4 LEAD WIRE 344 PFJS02M86Z CORD 345 PFHX1937Z COVER 346 XWC4BFJ WASHER 347 NOT USED 348 PFUV1118Z COVER S Ref No Part No Part Name Description Remarks 360 PFDG1548Z GEAR POM 361 PFNPD052080 SPACER 362 PFDG1549Z GEAR POM 363 PFDG1544Z GEAR P...

Page 268: ... Q510 2SB1197KQ TRANSISTOR SI S Q511 UNR92ANJ0L TRANSISTOR SI Ref No Part No Part Name Description Remarks Q512 UNR92ANJ0L TRANSISTOR SI Q514 2SD1991A TRANSISTOR SI Q516 2SD1991A TRANSISTOR SI Q517 2SD1991A TRANSISTOR SI Q518 2SB1197KQ TRANSISTOR SI S Q519 UNR92ANJ0L TRANSISTOR SI Q520 2SB1197KQ TRANSISTOR SI S Q521 2SK3018 TRANSISTOR SI S Q522 2SC4081R TRANSISTOR SI S Q523 2SB1197KQ TRANSISTOR SI...

Page 269: ...421 ECUE1H101JCQ 100p C422 ECUE1H101JCQ 100p Ref No Part No Part Name Description Remarks C423 ECUE1H101JCQ 100p C424 ECUE1H101JCQ 100p C425 ECUE1H101JCQ 100p C426 ECUE1H101JCQ 100p C427 ECUE1H101JCQ 100p C428 ECUE1H101JCQ 100p C429 ECUE1H101JCQ 100p C470 ECUE1H270JCQ 27p C471 ECJ0EF1C104Z 0 1 C501 ECUV1H104ZFV 0 1 C503 ECUV1H104ZFV 0 1 C504 ECJ0EF1C104Z 0 1 C505 F2G1V2210003 220 C506 ECUE1H100DCQ...

Page 270: ...10A00412 CONNECTOR 10 PIN CN509 K1KA04A00527 CONNECTOR 4 PIN CN510 K1KA12A00315 CONNECTOR 12 PIN CN511 K1KA08A00440 CONNECTOR 8 PIN CN514 K1KA02AA0193 CONNECTOR 2 PIN CN700 K1KA04A00644 CONNECTOR 4 PIN CN701 K1KA04AA0193 CONNECTOR 4 PIN Ref No Part No Part Name Description Remarks FUSES F100 K5G102A00041 FUSE F300 K5H312200002 FUSE RESISTORS L361 ERJ2GEJ150 15 L363 ERJ2GEJ221 220 L364 ERJ2GEJ221 2...

Page 271: ...390 39 R526 ERJ2GEJ103 10k R527 ERJ2GEJ562X 5 6k R528 ERJ2GEJ393X 39k Ref No Part No Part Name Description Remarks R529 ERJ2GEJ103 10k R530 ERJ12YJ390 39 R531 ERJ2GEJ562X 5 6k R532 PQ4R18XJ472 4 7k S R533 ERJ2GEJ102 1k R534 ERJ2GEJ103 10k R536 ERJ8RQF1R0 1 R537 ERJ8RQF1R0 1 R538 ERJ2GEJ102 1k R539 ERJ2GEJ103 10k R541 ERJ2GEJ122 1 2k R542 ERJ2GEJ122 1 2k R543 ERJ2GEJ220 22 R544 ERJ2GEJ122 1 2k R546...

Page 272: ...A401 EXB28V560JX COMPONENTS PARTS RA402 EXB28V560JX COMPONENTS PARTS RA403 EXB28V560JX COMPONENTS PARTS RA404 EXB28V470JX COMPONENTS PARTS RA405 EXB28V470JX COMPONENTS PARTS RA406 EXB28V470JX COMPONENTS PARTS RELAY RLY100 K6B1CYY00005 RELAY VARISTORS SA100 J0LY00000063 VARISTOR SURGE ABSORBER SA101 PFRZRA102P6T VARISTOR SURGE ABSORBER CRYSTAL OSCILLATORS X300 H0J120500055 CRYSTAL OSCILLATOR X301 H...

Page 273: ...ER S PS52 PFVIRM574SL PHOTO ELECTRIC TRANSDUCER S RESISTORS R50 ERJ3GEYJ331 330 R51 ERJ3GEYJ331 330 Ref No Part No Part Name Description Remarks PCB7 PFLP1911MZ E VARISTOR SENSOR BOARD ASS Y RTL VARISTOR ZNR50 PFRV271NS05K VARISTOR Ref No Part No Part Name Description Remarks PCB8 PFLP1911MZ F FLATBED REALY BOARD ASS Y RTL CAPACITORS C64 ECUV1C104ZFV 0 1 C65 ECUV1C104ZFV 0 1 CONNECTORS CN59 K1KA12...

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