Epson C82310/11 (Parallel I/F) Servisní příručka stáhnout pdf (Strana 44)

SERVICE MANUAL MASTER FILE

ENGLISH

Rev. A (1997/05/07)

3-13

.4 UNIT REPAIRING OF THE MAIN BOARD

This section is necessary only for servicers who repair to the component level. Servicers who

perform only board replacement can ignore this section.

The table below lets you troubleshoot problems with the main board (C229MAIN). The table

provides various symptoms, likely cases, and checkpoints. Checkpoints include waveforms,

resistance, and other value to be checked to evaluate the operation of each component.

Table 3-8. Repair of the C229MAIN

Symptom

Condition Cause Checkpoint Solution

The printer

dose not

operate at

all.

The CPU

dose not

operate.

The reset

circuit is not

operational.

Verify the voltage waveforms for the

+5VDC line (IC1, pin 3) and for the

reset signal (IC1, pin 1) when the

power is on.

5V line

/RESET

Figure 3-15. Reset Signal

Replace the

C229MAIN

board.

Selection

control ROM

is abnormal

Verify the signal at pin 22, IC7 or pin

30, IC6 which changes between

HIGH and LOW.

Figure 3-16. Chip Select Signal for

Program ROM

Replace the

C229MAIN

board.

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 103 104

Komentáře k této Příručce

Žádné komentáře

Epson C82310/11 (Parallel I/F) Servisní příručka Strana 44

Komentáře k této Příručce

Související produkty a manuály pro Tisk a skenování Epson C82310/11 (Parallel I/F)