Epson SQ-1170 Service Manual page 141

REV.-A
S y m p t o m I C o n d i t o n
The CPU
The printer
does not does not
operate.
crate at ail.
M a i n B o a r d (Cont.)
Cause
Either CG or
RAM is
defective.
Check the oscillator signal at either pin 53 or
CPU is
54 of the CPU.
defective.
5-14
Checkpoint
ii-i-t -l-t-i+ -m-t -l-H+
I t
Solution
Replace CG
or RAM.
If signal is
detected, re-
place CPU.
Otherwise
replace
CR2.