Denon AVC-4310 - CVBS Input Troubleshooting (Path A); CVBS Input Path A Troubleshooting Steps

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AVR-4310CI/AVR-4310/AVC-4310
※ Unless specified, 8U-210063-1 A.VIDEO UNIT part.
A
Input
CVBS
YES
Check ± 5VA and +5VD.
+5VA : CY152-13,14pin
-5VA : CY152-12pin
+5VD : CX141-1pin
NG
To troubleshooting 1.1 Power not
turn on.
OK
Check input/output of analog SW.
Input : IC109-13pin
Output : IC109-3pin
NG
Check analog SW settings.
IC109-9,10,11pin : L(0V)
IC109-6pin : L(0V)
NG
Check IC301, IC303 and CX141
soldering, or DIGITAL UNIT flaw.
OK
OK
Check soldering of IC109.
Check input/output of AMP.
Input : IC115-5pin
Output : IC115-7pin
NG
Check soldering of IC115 and
surrounding parts.
OK
Check output to 8U-310030 DIGITAL
UNIT.
Output V : CX111-1pin
NG
Check soldering of CX111.
OK
Check input of video driver.
Input Y : IC305-2pin
Input C : IC305-4pin
NG
Check CX151 soldering, or digital
unit flaw.
OK
Check output of video driver.
Output V : IC305-36pin
NG
Check soldering of IC305.
OK
Check input/output of analog SW.
Input : IC108-14pin
Output : IC108-13pin
NG
Check analog SW settings.
IC108-10pin : H(+5V)
IC108-9pin : L(0V)
NG
Check IC301 and CX141 solder-
ing, or DIGITAL UNIT flaw.
OK
OK
Check soldering of IC108.
Check input/output of AMP.
Input : IC112-5pin
Output : IC112-7pin
NG
Check soldering of IC112.
OK
Check cable between main unit and mon-
itor or Check monitor.