Epson 2180 Service Manual - Page 41
Unit Level Troubleshooting, Repairing the C165 PSB/PSE Board, Repairing the C272MAIN Board - reset
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LQ-2180 5.3 Unit Level Troubleshooting The information for this section is the same as for the LQ-2170 except for some points. The points to be changed are as follows: Point: All flowcharts provided in this section C165 MAIN Board → 272MAIN Board Point: Flowchart 2-1 CN12 → CN12 or CN16 5.4 Repairing the C165 PSB/PSE Board The entire information for this section is the same as for the LQ-2170. 5.5 Repairing the C272MAIN Board This section provides instructions to repair the C272 MAIN board assembly. It describes various problems, symptoms, likely causes, and solutions. The checkpoint column provides proper waveforms, resistance values, and other information for each component of C272 MAIN Board. NOTE: This information is necessary only for servicers who repair to the component level. Servicers who repair to the unit level (including all servicers in the U.S.) can ignore this section. Revision A Table 5-2. Repairing the C272MAIN Board (1/3) Problem Cause Checkpoint Solution The printer does Reset IC2 is not operate at all. defective. Check the voltage waveforms of the VCC signal (CH1: IC2 pin 3) and VOUT signal (CH2: IC2 pin 2) when power is turned on. Replace IC2. The PROM (IC10) is not selected. Check for a change in the Replace IC10 signal from HIGH/LOW at pin (or replace the 22 of IC10. main board). The PSRAM (IC8) Check for a change in the Replace IC8 (or signal from HIGH/LOW at pin replace the main 1 of the IC8. board). Troubleshooting Unit Level Troubleshooting 41