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Panasonic KX-MB262CX, Service Manual

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Panasonic KX-MB262CX Service Manual Download Page 24

KX-MB262CX/KX-MB772CX

6.17. Main Board Section

3.3V  Power Supply descriptions

• IC 302 decreases the output voltage when NPN transistor installed chopper amplifier type switching regulator produces 2.3A min

or over at the output voltage.
Oscillation frequency is set at approximately 500kHz.

• C375 and D302 are boost circuits as a base driving voltage for buit-in transistors.
• D301,R311,R312,R313,C375,Q300,R318,Q301are UVLO (Under Voltage Lock Out) circuit.

Q301 turns on when the in-out voltage is 17V or less and SS/SE terminal becomes low so that IC302's operation is stopped.

• 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.

• C395 and D305 are FET's boost circuit as a gate driving voltage.

20

102

66

67

30

1E

114

9

09

21

100

64

68

29

1D

115

9

09

22

97

61

69

28

1C

116

9

09

23

95

5F

70

27

1B

117

8

08

24

93

5D

71

27

1B

118

8

08

25

91

5B

72

26

1A

119

8

08

26

88

58

73

25

19

120

8

08

Temperature

[C

°

]

 AD value

HEX reading

Temperature

[C

°

]

 AD value

HEX reading

Temperature

[C

°

]

 AD value

HEX reading

Summary of Contents for KX-MB262CX

Page 1: ... All 2007 Panasonic Communications Co Ltd All ORDER NO KMF0711125CE ORDER NO KMF0711125CE Multi Function printer Multi Function printer KX MB262CX KX MB262CX KX MB772CX KX MB772CX for Asia and Middle Near East for Asia and Middle Near East ...

Page 2: ...ICE MODE SETTINGS ODE SETTINGS Example of a Example of a printed out printed out list list 89 89 12 12 Tr Troubl oubleshoo eshooting Guide ting Guide 93 93 12 1 12 1 USER REC USER RECOVER OVERABLE ERR ABLE ERRORS ORS 93 93 12 2 12 2 REMOTE REMOTE PROGRAM PROGRAMMING KX MING KX MB772CX MB772CX ONL ONLY Y 95 95 12 3 12 3 TROUBLESH TROUBLESHOOTING OOTING DET DETAILS AILS 102 102 12 4 12 4 DOCUME DOCU...

Page 3: ...vent fires injury or electric shock which can be caused by improper repair work be caused by improper repair work 1 1 When repair services ar When repair services are provided neither the products nor their parts or membe e provided neither the products nor their parts or members shall be remodeled rs shall be remodeled 2 2 If a lead wire assembly is supplied as a repair part the lead wire assembl...

Page 4: ... power cor er by the AC power cord are live d are live Never disassemble the unit for service with the AC power supply plugged in Never disassemble the unit for service with the AC power supply plugged in CAUTION CAUTION AC voltage is supplied to the primary side of the power supply unit AC voltage is supplied to the primary side of the power supply unit Therefore always unplug the AC power cord b...

Page 5: ... long PbF solder will tend to splash if it is heated much higher than its melting point approximately 1 PbF solder will tend to splash if it is heated much higher than its melting point approximately 1100 100 F 600 F 600 C C If you must use Pb solder on a PCB ma If you must use Pb solder on a PCB manufactured using PbF solder nufactured using PbF solder remove as much of the original PbF solder as...

Page 6: ...used batteries according to following caution Disposal of lithium batteries should be performed by permitted professional disposal firms knowledgeable in state government federal and local hazardous materials and hazardous waste transportation and disposal requirements A battery continues to have no transportation limitations as long as it is separated to prevent short circuits and packed in stron...

Page 7: ... Humidity Dimensions H W D KX MB262CX Approx height 255mm x width 420 mm x depth 445 m KX MB772CX Approx height 305mm x width 420 mm x depth 445 m Mass Weight KX MB262CX Approx 12kg KX MB772CX Approx 13kg Power Consumption Standby Approx 6 5 W Preheat Approx 65 W Copy Approx 320 W Maximum Approx 950 W When the fuser lamp turns on Power Supply 220 240 V AC 50 60 Hz Memory Capacity for operation and...

Page 8: ...X MB772CX 4 General Introduction 4 1 OPTIONAL ACCESSORIES Model No Description Specifications KX FAT92A KX FAT92E Replacement toner cartridge 1 toner cartridge KX FAD93A KX FAD93E Replacement drum unit 1 drum unit ...

Page 9: ...RY ADDRESS BUS 22 AA01 SDMD8 I O 3 3V 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 ADD...

Page 10: ...PWRDWN I 3 3V RTC POWER DOWN AE06 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 ...

Page 11: ...RY ADDRESS BUS 12 B22 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 INTERF...

Page 12: ... O 3 3V SDRAM DATA BUS 17 F03 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 INTERFA...

Page 13: ...PORT CNGMUTE N01 SDMD28 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...

Page 14: ...KX MB262CX KX MB772CX KX MB262CX KX MB772CX 6 6 12 12 9 9 2 2 Dr Drum um De Dete tect ctio ion n ...

Page 15: ...FAX MODE LED O MODE LED ON OFF port XLED N OFF port XLED8 IC1 5pin 8 IC1 5pin COPY MOD COPY MODE LED ON OFF E LED ON OFF port LED5 IC1 41pin port LED5 IC1 41pin SCAN MOD SCAN MODE LED ON OFF E LED ON OFF port LED2 IC1 36pin port LED2 IC1 36pin K KI IN N0 0 K KI IN N1 1 K KI IN N2 2 K KI IN N3 3 K KI IN N4 4 K KI IN N5 5 K KI IN N6 6 K KI IN N7 7 K KS SL L0 0 A AU UT TO O A AN NS SW WE ER R S S1 1 ...

Page 16: ...s supplied for ASCII code from the data bus D4 D7 V0 is supplied for the LCD drive the LCD drive R118 and R117 are density control resistors R118 and R117 are density control resistors Consequently Consequently in this unit in this unit the timing positive clock is generated by the LCD interface circuitry in the timing positive clock is generated by the LCD interface circuitry in the gate array IC...

Page 17: ...circuit via charge wire and GRID C Ch ha ar rg ge e C CH HG G G Gr ri id d D De ev ve el lo op pi in ng g D DC C D De ev ve el lo op pi in ng g A AC C T Tr ra an ns sf fe er r T TR RA A T Tr ra an ns sf fe er r T TR RA A Ou Outp tput ut Ch Char arac acte teri rist stic ics s Co Cons nsta tant nt cu curr rren ent t Co Cons nsta tant nt vo volt ltag age e Co Cons nsta tant nt vo volt ltag age e Co C...

Page 18: ...30 Vp p 34 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 voltage and output as AC voltage that includes the development DC voltage development DC voltage 6 15 6 15 5 5 TRA TRA BIAS T BIAS Trans ransfer fer BIAS BIAS TRA TRA BIAS T BIAS Trans ransfer B fer BIAS UN IAS UNIT IT When CHG REM ...

Page 19: ...ed on 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 20: ...KX MB262CX KX MB772CX ...

Page 21: ... 252 FC 84 202 CA 168 93 5D 1 251 FB 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 1...

Page 22: ...9 31 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 23...

Page 23: ... 38 65 41 85 19 13 8 176 B0 39 63 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 1...

Page 24: ...s stopped 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 FE...

Page 25: ...KX MB262CX KX MB772CX DC DC Main Board Supply ...

Page 26: ... equipped with the Hi Speed USB 2 0 interface USB cable is not supplied 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...

Page 27: ... following message may appear 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 like to install this device software Note If...

Page 28: ...upplied in this unit KX MB772CX only Do not extend the telephone line cord KX MB772CX only 1 Mains lead Connect to Household Mains Supply 220 240 V 50 60 Hz 2 Telephone line cord 1 Connect to telephone network 3 EXT socket 1 You can connect an answering machine or an extension telephone Remove the stopper if attached 4 Answering machine not included 1 1 For KX MB772CX only Important notice for the...

Page 29: ...connected to the same telephone line this unit may disturb the network condition of the device KX MB772CX only If you use the unit with a computer and your internet provider instructs you to install a filter please connect it as follows KX MB772CX only ...

Page 30: ... 9 1 YOUR LOGO KX MB772CX only You can program your logo name company name etc so that it appears on the top of each page sent For entering characters only the English alphabet numbers and symbols are available Chinese characters cannot be entered ...

Page 31: ...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 Press to switch between uppercase and lowercase 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 32: ...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 KX MB772CX ONLY 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 KX MB772C...

Page 33: ... 527 V 8 function select 1 OFF 2 ON 1 2 2 529 Call Service Clear 550 Memory clear Refer to Memory Clear Specification P 87 551 ROM check See P 80 552 DTMF single tone test 1 ON 2 OFF 1 2 2 See P 80 553 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 80 555 Scanner te...

Page 34: ...t History data Refer to Memory Clear Specification P 87 711 Dialing mode 1 PULSE 2 TONE TONE NG 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...

Page 35: ...tive Range Default Remarks 529 Call Service Clear 550 Memory clear Refer to Memory Clear Specification P 87 551 ROM check See P 80 555 Scanner test See P 80 556 Motor test 0 See P 80 557 LED test See P 80 558 LCD test See P 80 561 KEY test See P 80 628 H V P S check See P 80 639 LSU test See P 80 655 Cause Distinction Code of Call Service 3 See P 108 677 FAN test See P 80 710 Memory clear except H...

Page 36: ...KX MB262CX KX MB772CX 11 2 USER MODE The list below is an example of the SYSTEM SETUP LIST the unit prints out Example KX MB772CX Note The above values are the default values ...

Page 37: ...KX MB262CX KX MB772CX 11 3 SERVICE MODE SETTINGS Example of a printed out list Example KX MB772CX Note The above values are the default values ...

Page 38: ...KX MB262CX KX MB772CX 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 91 ...

Page 39: ...of times Caller ID was received 25 Not used 26 NUMBER OF PC SCAN The number of times multifunction was used for the Scan ner The number of pages scanned If the unit does not 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 KX MB772CX ONLY The number...

Page 40: ...RVICE 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 41: ... the 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 108 for details ...

Page 42: ...FAN 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 43: ...KX MB262CX KX MB772CX 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 44: ...KX MB262CX KX MB772CX 12 3 6 6 CALL SERVICE 6 CALL SERVICE 6 indicates that abnormal charge voltage is output from the high voltage unit ...

Page 45: ...KX MB262CX KX MB772CX 12 3 7 PRINT 12 3 7 1 GHOST IMAGE CROSS REFERENCE HIGH VOLTAGE SECTION P 166 POWER SUPPLY BOARD SECTION P 60 ...

Page 46: ...KX MB262CX KX MB772CX 12 3 7 2 DARK OR WHITE VERTICAL LINE Note When wiping the cover glass reflecting mirror use a dry and soft cloth ...

Page 47: ...KX MB262CX KX MB772CX 12 3 7 4 DIRTY OR HALF DARKNESS BACKGROUND CROSS REFERENCE HIGH VOLTAGE SECTION P 166 ...

Page 48: ...KX MB262CX KX MB772CX 12 3 7 5 BLACK PRINT CROSS REFERENCE HIGH VOLTAGE SECTION P 166 LSU Laser Scanning Unit SECTION P 38 ...

Page 49: ...KX MB262CX KX MB772CX 12 3 7 6 LIGHT PRINT CROSS REFERENCE HIGH VOLTAGE SECTION P 166 ...

Page 50: ...KX MB262CX KX MB772CX 12 3 7 7 BLACK OR WHITE POINT 12 3 8 RECORDING PAPER FEED 12 3 8 1 MULTIPLE FEED ...

Page 51: ...KX MB262CX KX MB772CX 12 3 8 2 THE RECORDING PAPER IS WAVED OR WRINKLED ...

Page 52: ...KX MB262CX KX MB772CX 12 3 8 3 SKEW ...

Page 53: ...KX MB262CX KX MB772CX 12 3 8 4 THE RECORDING PAPER DOES NOT FEED CROSS REFERENCE SENSOR SECTION P 156 MOTOR SECTION P 158 ...

Page 54: ...KX MB262CX KX MB772CX KX MB262CX KX MB772CX CROSS REFERENCE CROSS REFERENCE TEST FUNCTIONS TEST FUNCTIONS P 80 P 80 ...

Page 55: ...IC ach IC The ROM IC402 and The ROM IC402 and SDRAM IC400 are checked SDRAM IC400 are checked If initialization fails for the ICs the system will not boot up If initialization fails for the ICs the system will not boot up In this case please find the In this case please find the cause as follows cause as follows CROSS REFERENCE CROSS REFERENCE NG EXAMPLE NG EXAMPLE P 228 P 228 POWER SUPPLY BOARD S...

Page 56: ... 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 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 ...

Page 57: ...lephone l between the handset microphone and telephone line sending or between the telephone l ine and the handset speaker receiv ine and the handset speaker receiv ing or between the microphone and the telephone line sending or between the telephone line and the speaker receiving ing or between the microphone and the telephone line sending or between the telephone line and the speaker receiving C...

Page 58: ...ECTION 1 1 The FAX turns on but does not arrive through TAM The FAX turns on but does not arrive through TAM CROSS REFERENCE CROSS REFERENCE TAM INTERFACE SECTION TAM INTERFACE SECTION P 26 P 26 2 2 A FAX is received but won t switch from TAM to FAX A FAX is received but won t switch from TAM to FAX CROSS REFERENCE CROSS REFERENCE ANALOG SECTION ANALOG SECTION P 152 P 152 TAM INTERFACE SECTION TAM...

Page 59: ...KX MB262CX KX MB772CX 12 3 15 OPERATION PANEL SECTION Refer to TEST FUNCTIONS P 80 1 NO KEY OPERATION 2 NO LCD INDICATION CROSS REFERENCE TEST FUNCTIONS P 80 ...

Page 60: ... 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 KX MB772CX ONLY ...

Page 61: ...72CX 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 40 ...

Page 62: ...KX MB262CX KX MB772CX 12 3 17 MOTOR SECTION 12 3 17 1 ENGINE MOTOR ...

Page 63: ...KX MB262CX KX MB772CX 12 3 17 2 FB Flatbed MOTOR ...

Page 64: ...KX MB262CX KX MB772CX KX MB262CX KX MB772CX 12 12 3 2 3 22 2 USB USB SEC SECTIO TION N Troubleshooting Troubleshooting 1 Confirmation of the PC settings 1 Confirmation of the PC settings ...

Page 65: ...KX MB262CX KX MB772CX KX MB262CX KX MB772CX 2 Confirmation of the main unit 2 Confirmation of the main unit ...

Page 66: ...USB cable from PC is connected to CN300 VBUS voltage goes up connected to CN300 VBUS voltage goes up to 5V and IC300 recognize the connection with PC to 5V and IC300 recognize the connection with PC Then D becom Then D becomes about 3V es about 3V waveform waveform 1 1 1 1 The D becomes 0V The D becomes 0V then communication between IC300 and PC is star then communication between IC300 and PC is s...

Page 67: ...KX MB262CX KX MB772CX KX MB262CX KX MB772CX Waveform of normal operation Waveform of normal operation ...

Page 68: ...KX MB262CX KX MB772CX KX MB262CX KX MB772CX 12 3 12 3 23 23 MAIN MAIN BOARD BOARD SECT SECTION ION 3 3V TROUBLESHOOTING GUIDE 3 3V TROUBLESHOOTING GUIDE ...

Page 69: ...KX MB262CX KX MB772CX 1 2V TROUBLESHOOTING GUIDE ...

Page 70: ... Check for a short circuit in terminal 4 If D10 D13 is short circuit F2 will melt open D10 D13 is short circuit F2 will melt open In this case replace all of In this case replace all of the parts D10 D13 F2 the parts D10 D13 F2 D101 D101 If D101 is broken the If D101 is broken the oscillation circuit in the power supply cannot operate Check it oscillation circuit in the power supply cannot operate...

Page 71: ...orcibly before Do not pull out the jammed document forcibly before lifting the ADF lifting the ADF cover cover 1 1 Open the ADF cover 1 while holding the document cover 2 Open the ADF cover 1 while holding the document cover 2 2 2 Remove the jammed document 3 carefully Remove the jammed document 3 carefully When the document has jammed near the When the document has jammed near the document entran...

Page 72: ...KX MB262CX KX MB772CX KX MB262CX KX MB772CX When the document has jammed near the When the document has jammed near the document exit document exit 3 3 Close the ADF cover Close the ADF cover ...

Page 73: ... pape the jammed paper forcibly before opening th r forcibly before opening the top e top cover cover Case 1 Case 1 When the recording paper has jammed near the manual input When the recording paper has jammed near the manual input tray tray 1 Pull open the paper input tray 1 1 Pull open the paper input tray 1 2 Open the manual input tray 2 2 Open the manual input tray 2 and remove the jammed pape...

Page 74: ... Case 2 Case 2 When the recording paper has jammed near the drum and When the recording paper has jammed near the drum and toner unit toner unit 1 Pull open the paper input tray 1 1 Pull open the paper input tray 1 2 Lift the top cover release lever 2 and open the top cover 3 2 Lift the top cover release lever 2 and open the top cover 3 Note Note Do not touc Do not touch the transfe h the transfer...

Page 75: ...KX MB262CX KX MB772CX 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 76: ...locked 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 77: ...KX MB262CX KX MB772CX 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 78: ...KX MB262CX KX MB772CX 5 Close the top cover until locked ...

Page 79: ...ck 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 80: ...anual 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 81: ...roller 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 temper...

Page 82: ...KX MB262CX KX MB772CX 15 4 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES 15 4 1 MAIN BOARD 1 ...

Page 83: ...KX MB262CX KX MB772CX 15 4 2 MAIN BOARD 2 15 4 3 OPERATION BOARD ...

Page 84: ...il 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 ...

Page 85: ...cy of 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 86: ...rious 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 ...

Page 87: ...KX MB262CX KX MB772CX 15 6 1 NG EXAMPLE ...

Page 88: ...KX MB262CX KX MB772CX 15 7 TEST CHART 15 7 1 ITU T No 1 TEST CHART ...

Page 89: ...KX MB262CX KX MB772CX 15 7 2 ITU T No 2 TEST CHART ...

Page 90: ... Diagram 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 91: ...2 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 IO1 G24 IO2 F26 IO3 J26 IO4 J25 IO5 J23 IO6 ...

Page 92: ...LK AD25 ASPCLK AC26 BSPCLK AB26 AFECLK Y25 EXMDMCS AA26 EXTINT AF5 COL AD6 CRS 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 AFEA...

Page 93: ... K IC302 1 SW 2 VIN 3 ROSC 4 GND 5 SS EN 6 COMP 7 FB 8 BST 9 PAD Z 0 1 u C 6 6 0 5VD Z 0 1 u C 6 5 5 Z 0 1 u C 6 8 9 Z 0 1 u C 6 6 8 Z 0 1 u C 6 6 2 Z 0 1 u C 6 7 4 Z 0 1 u C 6 7 5 Z 0 1 u C 6 5 6 Z 0 1 u C 6 7 0 Z 0 1 u C 6 6 6 Z 0 1 u C 6 9 0 Z 0 1 u C 6 6 7 Z 0 1 u C 6 7 6 Z 0 1 u C 6 7 7 24V Z 0 1 u C 6 9 6 Z 0 1 u C 6 4 5 Z 0 1 u 5 0 V C 6 7 2 Z 0 1 u C 6 6 5 Z 0 1 u C 6 7 9 3 3V Z 0 1 u C 6 ...

Page 94: ...1 C N 6 0 C N 5 9 C N 6 1 J 5 3 1 2 2 1 1 1 P F U P 1 6 5 9 Z F A P b F C N 6 2 4 1 KX MB772CX 262CX FLATBED RELAY BOARD A P F U P 1 6 5 9 Z G P b F 1 4 C 5 6 R 5 3 R 5 2 C 5 5 A U T O C H A PFUP1659Z G PbF PS54 PS53 1 4 CN56 J55 J57 J56 KX MB772CX ADF SENSOR BOARD 1 1 8 2 A P F U P 1 6 5 9 Z H P b F 8 7 2 1 6 5 L 5 1 L 5 0 L 5 2 C 5 4 L 5 3 C 5 3 CN55 CN57 1 1 8 CN58 J61 J60 2 A P F U P 1 6 5 9 Z...

Page 95: ...KX MB262CX KX MB772CX 18 Exploded View and Replacement Parts List 18 1 CABINET MECHANICAL AND ELECTRICAL PARTS LOCATION 18 1 1 OPERATION PANEL SECTION ...

Page 96: ...KX MB262CX KX MB772CX 18 1 2 TOP COVER SECTION ...

Page 97: ...KX MB262CX KX MB772CX 18 1 3 ADF SECTION KX MB772CX ONLY ...

Page 98: ...KX MB262CX KX MB772CX 18 1 4 MOTOR SECTION KX MB772CX ONLY ...

Page 99: ...KX MB262CX KX MB772CX 18 1 5 LOWER CABINET SECTION ...

Page 100: ...OSCILLATOR Ref No Part No Part Name Description Remarks Ref No Part No Part Name Description Remarks PCB1 PFWP1MB772CX MAIN BOARD ASS Y RTL ICs IC100 C1CB00002689 IC IC101 C1CB00002690 IC IC200 C1CB00001769 IC IC202 C0ABEB000083 IC IC204 C1AB00002556 IC IC300 C1ZBZ0003716 IC IC301 C0EBE0000504 IC IC302 C0DBAYY00291 IC IC303 C0CBAAA00035 IC IC305 C0DBAYY00294 IC IC400 C3ABRG000037 IC IC402 PFWIMB77...

Page 101: ...04Z 0 1 C339 ECJ0EF1C104Z 0 1 C351 ECUE1H101JCQ 100p Ref No Part No Part Name Description Remarks C354 ECJ0EF1C104Z 0 1 C355 ECJ0EF1C104Z 0 1 C357 ECJ0EF1C104Z 0 1 C358 ECJ0EF1C104Z 0 1 C359 ECJ0EF1C104Z 0 1 C360 ECJ0EF1C104Z 0 1 C361 ECJ0EF1C104Z 0 1 C362 ECJ0EF1C104Z 0 1 C363 ECJ0EF1C104Z 0 1 C364 ECJ0EF1C104Z 0 1 C374 F1L1V1060002 10 C375 ECUV1C334ZFV 0 33 C376 ECUE1A104KBQ 0 1 C377 ECUE1C223KB...

Page 102: ...art No Part Name Description Remarks C682 ECJ0EF1C104Z 0 1 C684 ECJ0EF1C104Z 0 1 C685 ECJ0EF1C104Z 0 1 C687 ECJ0EF1C104Z 0 1 C688 ECJ0EF1C104Z 0 1 C689 ECJ0EF1C104Z 0 1 C690 ECJ0EF1C104Z 0 1 C691 ECJ0EF1C104Z 0 1 C692 ECJ0EF1C104Z 0 1 C693 ECJ0EF1C104Z 0 1 C695 ECJ0EF1C104Z 0 1 C696 ECJ0EF1C104Z 0 1 C697 ECJ0EF1C104Z 0 1 C698 ECJ0EF1C104Z 0 1 C699 ECJ0EF1C104Z 0 1 C701 ECUE1H102KBQ 0 001 C702 ECJ0...

Page 103: ...1 6 98k R378 ERJ2GEJ102 1k R380 ERJ2GEJ1R0 1 R381 ERJ2GEJ1R0 1 R382 ERJ2GEJ1R0 1 Ref No Part No Part Name Description Remarks R387 ERJ2GEJ105X 1M R388 ERJ2GEJ184 180k R389 ERJ2GEJ102 1k R391 ERJ2GEJ104 100k R392 ERJ2GEJ100 10 R399 ERJ2GEJ103 10k R400 ERJ2GEJ470 47 R401 ERJ2GEJ680 68 R402 ERJ2GEJ470 47 R403 ERJ2GEJ470 47 R404 ERJ2GEJ470 47 R405 ERJ2GEJ470 47 R406 ERJ2GEJ470 47 R407 ERJ2GEJ470 47 R4...

Page 104: ... Description Remarks L345 J0JCC0000286 IC FILTER L346 J0JCC0000286 IC FILTER L347 J0JCC0000286 IC FILTER L348 J0JCC0000277 IC FILTER L349 J0JCC0000277 IC FILTER L350 J0JCC0000277 IC FILTER L351 J0JCC0000277 IC FILTER L352 J0JCC0000277 IC FILTER L353 J0JCC0000277 IC FILTER L354 J0JCC0000277 IC FILTER L355 J0JCC0000277 IC FILTER L356 J0JCC0000277 IC FILTER L357 J0MAB0000146 IC FILTER L358 J0JCC00002...

Page 105: ...V1H391JCV 390p S C7 ECUV1H391JCV 390p S C8 ECUV1H103KBV 0 01 C10 ECUV1C104ZFV 0 1 C11 ECUV1C104ZFV 0 1 C12 ECUV1H101JCV 100p C13 ECUV1H101JCV 100p C14 ECUV1H101JCV 100p C17 F2G0J1010014 100 Ref No Part No Part Name Description Remarks C21 ECUV1H152KBV 0 0015 C22 ECUV1H152KBV 0 0015 LCD CN1 L5DAAFB00001 LIQUID CRYSTAL DISPLAY S CONNECTOR CN2 K1KA08B00243 CONNECTOR 8 PIN COILS L1 PQLQR2BT COIL S L2 ...

Page 106: ...rks PCB8 PFLP1911MZ F FLATBED REALY BOARD ASS Y RTL CAPACITORS C64 ECUV1C104ZFV 0 1 C65 ECUV1C104ZFV 0 1 CONNECTORS CN59 K1KA12B00138 CONNECTOR 12 PIN CN60 K1KA04B00225 CONNECTOR 4 PIN CN61 K1MN12BA0222 CONNECTOR 12 PIN CN62 K1KA04BA0061 CONNECTOR 4 PIN OTHERS L54 PQLQR2KB113T COIL S R55 ERJ3GEYJ472 4 7K Ref No Part No Part Name Description Remarks PCB9 PFLP1911MZ G ADF SENSOR BOARD ASS Y RTL CONN...

Page 107: ...KX MB262CX KX MB772CX H I KXMB262CX KXMB772CX ...

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