Specifications

REV.-A
Symptom
I Conditon
The printer
The CPU
does not oP-
does not
crate at ail.
operate.
Tmhln K-G Rcmair nf Main Board (Cont.)
. ““. ” - -.
..-~-..
-. . . . . . . . —-—- — . — ——. -—.
Cause
Checkpoint
Solution
Either
CG or
Replace
CG
RAM is
or RAM.
defective.
CPU is
defective.
Check the oscillator signal at either pin 53 or
54 of the CPU.
-tttt +tu -l-l-l+ -Hi+
ii-i-t -l-t-i+ -m-t -l-H+
*
-t
It
&
20ms I
If signal is
detected, re-
place CPU.
Otherwise
replace
CR2.
c
:.,.,’)
*“
5-14