General Information; Diagnosis; Trouble Shooting - Pioneer xc-la21 Service Manual

QQ
3 7 63 1515 0

7.1 GENERAL INFORMATION

7.1 DIAGNOSIS

7.1.1 TROUBLE SHOOTING

1. Troubleshooting
Please Plug in POWER cord
Can you hear the
sound of Relay ?
Can you hear the
sound of CD Changer Mechanism
or clamper movement ?
Please press the POWER key to turn the
POWER ON. Adjust the volume level.
Please change to TUNER mode
TE
L 13942296513
Is TUNER OK?
Please change to CD mode
Please change to AUX mode
Is AUX OK?
www
.
http://www.xiaoyu163.com
YES
NO
YES
NO
YES
YES
NO
YES
NO
Is CD OK?
YES
NO
YES
OK
x ao
y
i
http://www.xiaoyu163.com
8
2. Cannot hear the sound of relay when
power cord plug in
A
Is Power Supply of 5V
(pin 8 of CN301) supply ?
B
Are CLOCK CLT (pin 6 of
CN301) and pin 80 of IC401
Q Q
3 6 7 1 3
(pin 11 of IC401) has a low
pulse input while the power cord plug in ?
Or the RES pin return to high
C
Are the XT1 and XT2 (pin 12
and 13 of IC401) oscillated in
D
Are the CF1 and CF2 (pin 15
E
and 16 of IC401) oscillated in
u163
.
2 9 9 4 2 8
A
Please check the fuse
YES
F306, IC307 and the input
voltage pin of IC302.
high level ?
Please check the corres-
YES
ponding control circuit,
transistor Q301 and Q302.
1 5 Is the RES pin 0 5 8 2 9 9 4
finally ?
Please check the corres-
ponding reset circuit,
YES
transistor Q406.
32.768kHz ?
Please check the corres-
YES
ponding clock generating
circuit (X401).
And SYS-STOP pin (pin 26
of IC401) should be in 5V.
8MHz ?
Please check the corres-
YES ponding clock generating
circuit (X402).
The IC401 damaged.
m
co
XC-LA21
9 9
NO
NO
2 8 9 9
NO
NO
NO
37