Sanyo HV-DX4EV Service Manual page 9

TROUBLESHOOTING
D. No OSD(On Screen Display) appears
No OSD appears.
YES
NO
Is 5V obtained at IC501 pin# 53,
Check POWER circuit.
98, 99?
YES
Is Video signal output at IC501
Is Video signal input at IC501
NO
pin#52?
Check IC 501.
E. No DVD Video
DVD Composite signal doesn t
appear
YES
NO
Is signal output at PD01 Check FFC CABLE & DVD
pin# 5?
YES
NO
Is signal at IC301 pin#56? Check PCB Pattern
YES
NO
Is signal at IC301 pin#61?
YES
Check RF output.
Check Line output
Remark previous 3-A
NO
Replace IC501.
pin#50?
Check IC 501.
Module
Check IC301
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4. AUDIO (Hi-Fi MODEL)
A. No sound in E-E mode
a. RF E-E
No sound in RF E-E mode
Is 5V obtained at IC051 pin#1?
YES
Is there SIF signal at IC051 pin#2
in RF mode?
YES
Is there SIF signal out at IC051
pin#30, 31?
YES
Is 12V obtained at IC251 pin#34?
YES
Is 5V obtained at IC251 pin#40?
YES
NO
Is Audio signal output at IC251
Are CLK and DATA obtained at
pin#16,17?
IC251 pin#42,43?
YES
NO
Is Audio signal output at IC601 pin
#3, 13?
YES
Check Output JACK.
TROUBLESHOOTING
NO
Check Power circuit.
NO
Check RF101.
NO
Check IC051.
NO
Check POWER circuit.
YES
Replace IC251.
Comparing with switching table, are SWA, B CTL SIGNAL
right at IC601 pin #9,10?
YES NO
Replace IC601. Check IC501.
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