Trouble Shooting - Aiwa xc-rw700 Service Manual

TROUBLESHOOTING - 26/26
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BETA Measurement circuit ceck
After inserting Test Disc(TCD-784),
start playing.
IC401 Pin 86(RRF):3+/-1.0V?
YES
RRFIN:2+/0.7V?
(IC401 PIN85)
YES
IC405 Pin 10(CDR/RWS)= H ?
YES
IC701 Pin 78(ASYMI/BETA):
2+/-1.0V?
YES
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NO
Check the connection of IC401 pin 86.
Check and replace the IC401
(CXA2551R).
Check
NO
Check and replace the IC407.
Check
NO
Check
NO
Check the replace the IC405(BU4052)
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2 9
8
the connection of IC407.
the connection of IC701 pin 20.
and replace the IC701(MICOM).
Is BETA signal nomal?
(IC405 pin 14)
YES
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3 6 7 1 3 1 5
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9 4 2 8
NO
Check the connection of IC401 pin 82.
Check and replace the IC401.
0 5 8 2 9 9 4 2 8
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9 9
9 9