Troubleshooting - 1/26 - Aiwa xc-rw700 Service Manual

TROUBLESHOOTING - 1/26

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1. POWER CIRCUIT(SMPS)
1) NO 5V(-COM, FRONT)
No 5V
YES
Is the F901 normal?
YES
Is the BD901 normal?
YES
Is the R901 normal?
YES
Is VCC(=13~18V) supplied to the
IC901 pin5?
YES
Is the D909 normal?
YES
Does about 2.5V appear at the
IC904 Pin1?
YES
Is the D908, D910 Normal?
YES
Is the IC906, IC907 normal?
YES
Is the D906 normal?
YES
Power in Main PCB is short.
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8
NO
Replace the F901.
(Use standard fuse)
NO
Replace the BD901.
NO
Replace the R901.
NO
Is the D902 normal?
Check and replace the D902.
NO
Q Q
Replace the D909.
3 6 7 1 3
NO
Replace the IC904.
NO
Replace the D908, D910.
NO
Check and replace the IC906,
IC907.
NO
Check and replace the D906.
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2 9 9 4 2 8
NO
1 5 0 5 8 2 9 9 4
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9 9
2 8 9 9