User manual LEXMARK IBM TYPEWRITER 6746

[. . . ] Changes are periodically made to the information herein; these changes will be incorporated in later editions. Improvements or changes in the products or the programs described may be made at any time. Comments may be addressed to Lexmark International, Inc. , Department D22A/032-2, 740 West New Circle Road, Lexington, Kentucky 40550, U. S. A or e-mail at ServiceInfoAndTraining@Lexmark. com. Lexmark may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you. [. . . ] Go to step 4. 4 5 Is the JLVPS1 cable correctly installed at JLVPS1 on the system card?Disconnect the JLVPS1 cable from the system card. Turn the printer on, and measure the voltage between the JLVPS1 cable pin 1 and the JLVPS1 pin 14 (black wire). Does this measure approximately +5 V dc? Reseat the JLVPS1 cable. See "Low voltage power supply (LVPS) removal" on page 4-65. Diagnostic information 2-51 5022-xxx Step Questions / actions Turn the printer off. Connect the JLVPS1 cable to the system card. Remove one option/feature at a time, and turn the printer on to isolate the failing part. Warning: Observe all the ESD precautions (see "Handling ESD-sensitive parts" on page 4-1) and turn the printer off before any feature or option cards are removed or replaced. Is a failing part found? Yes Replace the faulty part. No Contact your next level of support. 6 Exit sensor service check Step 1 Questions / actions Verify the paper is loaded properly in the manual feed slot. See "Loading media in the multipurpose feeder or manual feeder" on page 3-28. Is the paper properly loaded in the manual feed slot?See "Operator panel assembly removal" on page 4-23. If this does not fix the problem, replace the top cover access assembly. See "Top access cover assembly removal-- model C52x only" on page 4-28 or "Top access cover assembly removal-- model C53x only" on page 4-32. No Go to step 2. 2 Disconnect the operator panel assembly cable from JOPP1 on the system card, and measure the voltage on pin 6 and ground. Does the voltage measure approximately +3. 3 V dc? Replace the system card. See "System card removal" on page 4-92. Operator panel display blank, five beeps, and LED off Service tip: The printer has detected a problem with the system card, the operator panel assembly cable (part of the top cover access assembly), or the operator panel assembly if POST does not complete. The printer emits five beeps, and sticks in a continuous pattern until the printer is turned off. Step 1 Questions / actions Is the operator panel assembly cable properly installed at system card JOPP1 and at the operator panel assembly?Measure the voltage between JOPP1 pin 2 and ground on the system card. No Reinstall the cable. 2 Go to step 3. Replace the system card. See "System card removal" on page 4-92. [. . . ] 1 3 5 7 9 11 13 15 17 19 21 23 JINT1 1 2 3 JLVPS1 1 3 5 7 9 11 13 15 JMIRR1 1 2 3 4 5 JOPT1 1 3 5 7 9 Signal Ground C-DEVPWM Y-DEVPWM Ground HV_EMPTY_C HV_EMPTY_Y HV_CHRG_PWM HV_XFER_PWM_C HV_XFER_PWM_M HV_XFER_PWM_Y CORE_CURR_SNSD HV_XFER_PWM_K VS_JINT-1 (+5V_SW) Ground VS_INT (+5V_PH) +5 V dc +5 V dc LVPS_ZERO_XING +24 V dc Ground Ground Ground LVPS_BRON MM_REF MM_LOCK MM_START Ground +24 V dc VS_JOPT-1 (+5V_SW) S_OPT_ENC Ground +24VC OPT_PLEV 2 4 6 8 10 OPTION_PWM OPT_TYPE Ground OPT_PSIZE OPT_PCTL 2 4 6 8 10 12 14 16 +5 V dc +5 V dc +24 V dc +24 V dc Ground Ground Ground LVPS_HRON Pin no. 2 4 6 8 10 12 14 16 18 20 22 24 Signal V_24VD M-DEVPWM K-DEVPWM +5V_SW HV_EMPTY_M HV_EMPTY_K TONER_CHK XFER_SERV0_C XFER_SERV0_M XFER_SERV0_Y HVPS_ID XFER_SERV0-K 5-14 Service Manual 5022-xxx Connector listing--models C52x (see "System card (network)--models C52x" on page 5-11 or "System card (non-network)--models C52x" on page 5-12) (continued) Connector JOPP1 Pin no. 1 2 3 4 5 6 7 JPH1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Signal I2C_DATA5_OP V_PANEL+5V I2C_CLK_OP Ground I2CIRQ5_R +3. 3 V dc Ground Ground D_VDO_MD_VDO_M+ Ground D_VDO_CD_VDO_C+ Ground PH_EMS1_SNS_R VDO_BOOST1 VDO_LPOW1 VDO_LADJ01 VDO_HADJ01 PH_EMS0 VDO_BOOST0 VDO_LPOW0 VS_+5VPH_NVX_R PH_EOS_THERM_SNS +5V_PH I2C_CLK_PH I2C_DATA_PH VDO_LENA PH_EMS2_SNS_R VDO_BOOST2 VDO_LPOW2 VDO_LADJ23 VDO_HYSNC1 PH_EMS3_SNS_R VDO_BOOST3 VDO_LPOW3 Ground Pin no. Signal Locations and connectors 5-15 5022-xxx Connector listing--models C52x (see "System card (network)--models C52x" on page 5-11 or "System card (non-network)--models C52x" on page 5-12) (continued) Connector JPH1 (continued) Pin no. [. . . ]