Sony RDR-VX521 - Page 128

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TUNER CVBS Video Input Error
Check TUNER
(Video input signal, Pin #16)
No
1. Check VCC and peripheral
parts of Clock oscillation
(Pin #66, 67) of IC808
No
Yes
Yes
Check IC808
(Pin # 27)
1. Check VCC and peripheral parts of
IC808 and QM1.
2. Check IC807 (Pin #1, 14, 16)
No
Yes
Check IC808
(Pin #86~#88, #93~97)
Check VCC, 3.58MHz clock , IIC CLK
and IIC DATA of TUNER
1) VCC : Pin #3,14
2) IIC CLK, DATA : Pin #9, 10
3) 3.58MHz clock : Pin #7
1. Check VCC of IC201 and peripheral
parts of Clock oscillation
(IC302 Pin #1, 2, 14)
2. Refer to the “ CVBS output error”