Lexmark C736 Service Manual
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Diagnostic information2-115 5026 Go Back Previous Next 3Measure the resistance across fuse F13 on the system board. Is the fuse blown?Replace the system board. See “System board removal” on page 4-153.Go to step 4. 4Replace the MPF/duplex motor assembly. See “Multipurpose feeder (MPF)/duplex motor assembly removal” on page 4-118. Does the error clear?Problem resolved. Replace the system board. See “System board removal” on page 4-153. Step Questions / actions Yes No 1JSB1JBIN1 JFAN1JFUSER1 JBOR1JHVPS1 JMIRR1JBLW1 JCVR1 JLVPS2 JCARTP1 JCARTS1 JCARTS2 JCARTP2 JDVR1 JTPS1 JOPT1 JFDS1 JINT1 JFDPCK1JTRAY1JSEC1 JDX1 JT12J5 JDIMM1JOPP1 JT1 JUSB1 JBOOT1 JFMUSB1 JFMUSB1 J49 JTWF1 JTDBUG1 1111 11 1 11 1 1 1 1 1 1 1 1 1 11 1 1111 JTLBT1 JPH1 F5F6F7 F9 F10F12F13F141 1J1011 A
2-116Service Manual 5026 Go Back Previous Next 920.27, 920.28, 920.29—POST (power on self test) service check 925.01, 925.03, 925.05—Fan error service check Step Questions / actions Yes No 1Is the specified option the 550-sheet tray? Replace the 550-sheet tray with a new 550-sheet tray option.Go to step 2. 2Is the specified option the special media tray? Replace the special media tray with a new special tray option.Go to step 3. 3Is the specified option the high-capacity input tray (HCIT)?Replace the HCIT controller board assembly. See “HCIT controller board assembly removal” on page 4-197. Step Questions / actions Yes No 1Turn the printer off, and then remove the rear frame cover. See “Rear frame cover removal” on page 4-33. Check the cable in connector JFAN1 (A) for proper connection to the system board, for pinch points, and for any other damage to the cable or the connector. Is the cable damaged?Replace the fan. See “Cooling fan removal” on page 4-74. Go to step 2. 2Measure the resistance across fuse F5 on the system board. Is the fuse blown?Replace the system board. See “System board removal” on page 4-153. Go to step 3. 31. Disconnect the cable in connector JFAN1, and connect a new fan. 2. Bring the printer up in Diagnostic menu (turn off the printer, press and hold and . and turn on the printer). Did the error clear?Replace the cooling fan. See “Cooling fan removal” on page 4-74. Replace the system board. See “System board removal” on page 4-153. 1JSB1JBIN1 JFAN1JFUSER1 JBOR1JHVPS1 JMIRR1JBLW1 JCVR1 JLVPS2 JCARTP1 JCARTS1 JCARTS2 JCARTP2 JDVR1 JTPS1 JOPT1 JFDS1 JINT1 JFDPCK1JTRAY1JSEC1 JDX1 JT12J5 JDIMM1JOPP1 JT1 JUSB1 JBOOT1 JFMUSB1 J49 JTWF1 JTDBUG1 1111 11 1 11 1 1 1 1 1 1 1 1 1 11 1 1111 JTLBT1 JPH1 F5F6F7 F9 F10F12F13F141 1J1011 A 1JSB1JBIN1 JFAN1JFUSER1 JBOR1JHVPS1 JMIRR1JBLW1 JCVR1 JLVPS2 JCARTP1 JCARTS1 JCARTS2 JCARTP2 JDVR1 JTPS1 JOPT1 JFDS1 JINT1 JFDPCK1JTRAY1JSEC1 JDX1 JT12J5 JDIMM1JOPP1 JT1 JUSB1 JBOOT1 JFMUSB1 J49 JTWF1 JTDBUG1 1111 11 1 11 1 1 1 1 1 1 1 1 1 11 1 1111 JTLBT1 JPH1 F5F6F7 F9 F10F12F13F141 1J1011 A
Diagnostic information2-117 5026 Go Back Previous Next 925.02, 925.04, 925.06—Cartridge cooling fan error service check Step Questions / actions Yes No 1Turn the printer off, and remove the rear frame cover. See “Rear frame cover removal” on page 4-33. Check the cable in connector JBLW1 (A) for proper connection to the system board, for pinch points, and any other damage to the cable or connector. Is the cable damaged?Replace the blower. See “Cartridge cooling fan removal” on page 4-61. Go to step 2. 2Measure the resistance across fuse F5 (A) on the system board. Is the fuse blown?Replace the system board. See “System board removal” on page 4-153. Go to step 3. 3Disconnect the cable in connector JBLW1, and connect a new cartridge cooling fan. Bring up the printer in Diagnostic menu Did the error clear?Replace the cartridge cooling fan. See “Cartridge cooling fan removal” on page 4-61.Replace the system board. See “System board removal” on page 4-153. 1JSB1JBIN1 JFAN1JFUSER1 JBOR1JHVPS1 JMIRR1JBLW1 JCVR1 JCVR1 JLVPS2 JCARTP1 JCARTS1 JCARTS2 JCARTP2 JDVR1 JTPS1 JOPT1 JFDS1 JINT1 JFDPCK1JTRAY1JSEC1 JDX1 JT12J5 JDIMM1JOPP1 JT1 JUSB1 JBOOT1 JFMUSB1 J49 JTWF1 JTDBUG1 1111 11 1 11 1 1 1 1 1 1 1 1 1 11 1 1111 JTLBT1 JPH1 F5F6F7 F9 F10F12F13F141 1J1011 A 1JSB1JBIN1 JFAN1JFUSER1 JBOR1JHVPS1 JMIRR1JBLW1 JCVR1 JCVR1 JLVPS2 JCARTP1 JCARTS1 JCARTS2 JCARTP2 JDVR1 JTPS1 JOPT1 JFDS1 JINT1 JFDPCK1JTRAY1JSEC1 JDX1 JT12J5 JDIMM1JOPP1 JT1 JUSB1 JBOOT1 JFMUSB1 J49 JTWF1 JTDBUG1 1111 11 1 11 1 1 1 1 1 1 1 1 1 11 1 1111 JTLBT1 JPH1 F5F6F7 F9 F10F12F13F141 1J1011 A
2-118Service Manual 5026 Go Back Previous Next 945.xx, 947.xx—Transfer roll error service check Step Questions / actions Yes No 1Replace the transfer module. POR the printer. Did the error clear?Problem resolved. Replace the original transfer module. Go to step 2. 2Turn the printer off, and then remove the rear frame cover. See “Rear frame cover removal” on page 4-33. Check the cable in connector JHVPS1 (A) for proper connection to the system board, the cable for pinch points, and the cable or connector for any other damage. Is the cable damaged?Replace the HVPS cable. See “High-voltage power supply (HVPS) cable removal” on page 4-110. Go to step 2. 3Disconnect JHVPS1 from system board and HVPS. Check for the following continuity.Go to step 3. Replace the HVPS cable. See “High-voltage power supply (HVPS) cable removal” on page 4-110. Is continuity present? 1JSB1JBIN1 JFAN1JFUSER1 JBOR1JHVPS1 JMIRR1JBLW1 JCVR1 JLVPS2 JCARTP1 JCARTS1 JCARTS2 JCARTP2 JDVR1 JTPS1 JOPT1 JFDS1 JINT1 JFDPCK1JTRAY1JSEC1 JDX1 JT12J5 JDIMM1JOPP1 JT1 JUSB1 JBOOT1 JFMUSB1 J49 JTWF1 JTDBUG1 1111 11 1 11 1 1 1 1 1 1 1 1 1 11 1 1111 JTLBT1 JPH1 F5F6F7 F9 F10F12F13F141 1J1011 A Pin 24 Pin 23 Pin 1 Pin 2Pin 2Pin 1Pin 23 Pin 24 JHVPS1 cable to: Error code HVPS System board Pin 19 Pin 19 945.01, 946.01, 947.01 Pin 20 Pin 20 Pin 15 Pin 15 945.02, 946.02, 947.02 Pin 16 Pin 16 Pin 17 Pin 17 945.03, 946.03, 947.03 Pin 18 Pin 18 Pin 23 Pin 23 945.04, 946.04, 947.04 Pin 24 Pin 24
Diagnostic information2-119 5026 Go Back Previous Next 4Remove the HVPS. See “High-voltage power supply (HVPS) removal” on page 4-108. Check for continuity between the contacts (yellow1 and yellow2, cyan1 and cyan2, magenta1 and magenta2, or black1 and black2) on the transfer contact assembly. Go to step 4. Replace the transfer contact assembly. Is continuity present? 4 Replace the HVPS. See “High-voltage power supply (HVPS) removal” on page 4-108. Does the error clear?Problem resolved. Replace the system board. See “System board removal” on page 4-153. Step Questions / actions Yes No yellow2 cyan2 magenta2 black2yellow1 cyan1 magenta1 black1
2-120Service Manual 5026 Go Back Previous Next 950.00–950.29—EPROM mismatch failure Warning:When replacing any one of the following components: •System board •Operator assembly card or top access cover assembly Replace only one component at a tie or the printer will be rendered inoperable. Replace the required component, bring the printer up in Diagnostic menu (see “Diagnostics menu” on page 3-2), and verify that the problem is fixed before performing a POR. This error code indicates a mismatch between the operator panel assembly and the system board. Step Questions / actions Yes No 1Has the operator panel assembly been replaced recently?Replace the operator panel assembly with a new, and not previously installed, operator panel assembly, See “Operator panel assembly removal” on page 4-24. Go to step 2. 2Has the top access cover assembly been replaced recently?Replace the top access cover assembly with a new, and not previously installed, operator panel assembly. See “Top access cover assembly removal” on page 4-40. Go to step 3. 3Has the system board been replaced recently?Replace the system board with a new, and not previously installed, system board. See “System board removal” on page 4-153. Go to step 4. 4Turn the printer power off for ten or more seconds. Then turn the printer back on (POR the printer). Is the error gone, and can the printer print?Problem resolved. Go to step 5. 5Clear the NVRAM of the printer: 1. Turn the printer power off. 2. With the printer off, press and hold the left ( ), up ( ), and right ( ) arrow buttons. 3. Turn the printer power on. 4. When the printer screen displays Restoring Factory Defaults, release the buttons. Note: If the printer locks up on the Restoring Factory Defaults, wait two minutes, and then turn the printer power off. After ten seconds or more, turn the printer power back on without holding down any buttons. Is the error message still displayed?Go to step 6. Problem resolved. 6Replace the operator panel assembly. See “Operator panel assembly removal” on page 4-24. Is the error message still displayed?Replace the system board. See “System board removal” on page 4-153. Problem resolved.
Diagnostic information2-121 5026 Go Back Previous Next 956.xx—System board failure service check 5 V interlock switch service check Step Questions / actions Yes No 1Turn the printer off, and remove the rear frame cover. See “Rear frame cover removal” on page 4-33. Check the cable in connector J49 for proper connection to the system board. Is the cable seated correctly?Replace the system board. See “System board removal” on page 4-153.Reseat the cable. Step Questions / actions Yes No 1Is the +5 V interlock switch damaged? Replace the 5 V interlock switch. See “5 V interlock switch cable removal” on page 4-45.Go to step 2. A A
2-122Service Manual 5026 Go Back Previous Next 2Turn the printer off, and remove the rear frame cover. See “Rear frame cover removal” on page 4-33. Check the cable in connector JINT1 (A) for proper connection to the system board, for pinch points, and for any other damage to the cable or connector. Is the cable damaged?Replace the 5 V interlock switch. See “5 V interlock switch cable removal” on page 4-45.Go to step 3. 31. Disconnect the cable in connector JINT1. 2. Connect the new 5 V interlock switch to JINT1. 3. Bring the printer up in Diagnostics Menu (turn off the printer, press and hold and . and turn on the printer). 4. Activate the 5 V interlock switch. Does the display change from Close Front Door to the Diagnostic Menu?Replace the 5 V interlock switch. See “5 V interlock switch cable removal” on page 4-45.Replace the system board. See “System board removal” on page 4-153. Step Questions / actions Yes No 1JSB1JBIN1 JFAN1JFUSER1 JBOR1JHVPS1 JMIRR1JBLW1 JCVR1 JLVPS2 JCARTP1 JCARTS1 JCARTS2 JCARTP2 JDVR1 JTPS1 JOPT1 JFDS1 JINT1 JFDPCK1JTRAY1JSEC1 JDX1 JT12J5 JDIMM1JOPP1 JT1 JUSB1 JBOOT1 JFMUSB1 J49 JTWF1 JTDBUG1 1111 11 1 11 1 1 1 1 1 1 1 1 1 11 1 1111 JTLBT1 JPH1 F5F6F7 F9 F10F12F13F141 1J1011A
Diagnostic information2-123 5026 Go Back Previous Next 24 V interlock switch service check Step Questions / actions Yes No 1Is the 24 V interlock switch damaged? Replace the 24 V interlock switch. See “24 V interlock switch removal” on page 4-47.Go to step 2. 2Turn the printer off, and remove the rear frame cover. See “Rear frame cover removal” on page 4-33. Check the cable in connector JCVR1 (A) for proper connection to the system board, for pinch points, and for any other damage to the cable or connector. Is the cable damaged?Replace the 24 V interlock switch. See “24 V interlock switch removal” on page 4-47.Go to step 3. 31. Disconnect the cable in connector JCVR1. 2. Connect the new 24 V interlock switch to the connector JCVR1. 3. Bring the printer up in Diagnostics Menu (turn off the printer, press and hold and . and turn on the printer). 4. Activate the new 24 V interlock switch. Does the display change from Close Front Door to the Diagnostic Menu.Replace the 24 V interlock switch. See “24 V interlock switch removal” on page 4-47.Replace the system board. See “System board removal” on page 4-153. 1JSB1JBIN1 JFAN1JFUSER1 JBOR1JHVPS1 JMIRR1JBLW1 JCVR1 JCVR1 JLVPS2 JCARTP1 JCARTS1 JCARTS2 JCARTP2 JDVR1 JTPS1 JOPT1 JFDS1 JINT1 JFDPCK1JTRAY1JSEC1 JDX1 JT12J5 JDIMM1JOPP1 JT1 JUSB1 JBOOT1 JFMUSB1 J49 JTWF1 JTDBUG1 1111 11 1 11 1 1 1 1 1 1 1 1 1 11 1 1111 JTLBT1 JPH1 F5F6F7 F9 F10F12F13F141 1J1011 A
2-124Service Manual 5026 Go Back Previous Next Bubble sensor service check Step Questions / actions Yes No 1Is the bubble sensor flag damaged? Replace the fuser. See “Fuser removal” on page 4-104.Go to step 2. 2Remove the rear frame cover. See “Rear frame cover removal” on page 4-33. Check the fuser DC cable in connector JFUSER1 (A) for proper connection to the system board, pinch points, and any other damage to the cable or connector. Is the cable damaged?Replace the fuser DC cable. See “Fuser DC cable removal” on page 4-106. Go to step 3. 3Place a voltmeter between the fuser DC autoconnect, pin 3 and ground (pin 6). Does the voltage meter read +5 V dc?Go to step 5. Go to step 4. 1JSB1JBIN1 JFAN1JFUSER1 JBOR1JHVPS1 JMIRR1JBLW1 JCVR1 JLVPS2 JCARTP1 JCARTS1 JCARTS2 JCARTP2 JDVR1 JTPS1 JOPT1 JFDS1 JINT1 JFDPCK1JTRAY1JSEC1 JDX1 JT12J5 JDIMM1JOPP1 JT1 JUSB1 JBOOT1 JFMUSB1 J49 JTWF1 JTDBUG1 1111 11 1 11 1 1 1 1 1 1 1 1 1 11 1 1111 JTLBT1 JPH1 F5F6F7 F9 F10F12F13F141 1J1011 A