Casio CD-350S Service Manual page 11

1. At power on, "00" is not displayed.
1
Is + 5V lines
normal (for IC902)?
Does
16.93MHz clock pulse appear
at pin 78/79 of IC901?
Check soldering and circuit around IC901.
Check LCD.
Check wire connector.
2. Total track number is not displayed.
Less than 16 sec.
(See page10)
Note : Figure 7 is normal eyepattern.
pin 1 FO IC902 (RFO)
No
Yes
No
Yes
2
How long does it take until "00 00:00" is
displayed after the CD door has closed?
A
pin 3 FO IC902 (VREF)
Check Q903.
Check pins 26 and 58.59.77 of IC901.
Check X901.
Check circuit around X901 and IC901.
More than 16 sec.
B
(See page13)
— 9 —
Figure 7
1.0 Vp-p
~
1.5 Vp-p