Component Repair Of The C211 Main Board - Epson Stylus COLOR 1520 Service Manual

EPSON 6W\OXV &2/25 1520

5.4 Component Repair of the C211 MAIN Board

This section provides information which enables you to repair and replace defective components on the
C211-B MAIN board. Table 5-6 and 5-7 lists the causes for each symptom in order of possibility, with
which you are able to find and repair the defective part.
Table 5-6. Component Repair of the C211 MAIN Board (1)
Symptom Condition
The printer CPU doesn't
does not operate.
operate at all. The driver
mechanism
doesn't operate
properly at
power on/off.
CR does not CR motor
operate does not rotate
normally. normally.
CPU is defective.
5-10
Cause
Reset circuit is Check the /RESET signal at
defective. the pin 1 and 5 V line at pin 3
of the IC1.
Selection of ROM Check the /CS1 (Pin 1) and
and sub gate array /CS2 (pin 2) of the CPU (IC7)
is abnormal. for the change in the signal
High and Low.
CG-ROM or PROM is defective.
CPU is defective. Check the signal form of the
XTAL (pin 85) and EXTAL (pin
86) of the CPU (IC7).
Sub gate array IC5 Check the waveforms of
is defective. DATA A (pin 6) or DATA B (pin
17) of the IC17.
Checkpoint
Replace the MAIN
board or the reset IC.
Replace the MAIN
board.
Replace the MAIN
board or PROM.
Replace the MAIN
board or CRU1.
Replace the MAIN
board or IC17.
Replace the MAIN
board.
Solution
Rev. A