Denon AVR-2308CI Service Manual page 28

Q Q
3 7 6 3 1 5 1 5 0
M
Input
CVBS
1U-3853-1 A.VIDEO UNIT
To troubleshooting 1.1 Power not turn
Check 5VA. NG
+5VA : CX077-3,4pin on.
-5VA : CX077-5pin
OK
Check input/output of analog SW.
NG
Input Y : IC109-13pin
Output C : IC109-3pin
OK
Check input/output of AMP.
Check soldering of IC115 and
NG
Input : IC115-5pin
surrounding parts.
Output : IC115-7pin
OK
Check output to1U-3852 DIGITAL UNIT. NG
Output V : CX113-5pin
OK
Check input of video driver
Input Y : IC305-15pin NG Check CX113 soldering, or DIGITAL
Input Cb : IC305-17pin UNIT flaw.
Input Cr : IC305-13pin
T E
L 1 3 9 4 2 2 9 6 5 1 3
OK
Check output of video driver.
Output Y : IC305-22pin
NG
Output Cb : IC305-20pin
Output Cr : IC305-24pin
OK
Check input/output of COMPONENT
selector.
Input Y : IC501-6pin
Input Cb : IC501-8pin Check IC501,CX112 and CX155 sol-
NG
Input Cr : IC501-10pin dering, or DIGITAL UNIT flaw.
Output Y : IC501-27pin
Output Cb : IC501-24pin
Output Cr : IC501-21pin
OK
Check input/output of AMP.
Input Y : IC504-1pin
Input Cb : IC504-3pin
NG
Input Cr : IC504-5pin
Output Y : IC504-13pin
Output Cb : IC504-11pin
Output Cr : IC504-9pin
OK
w w w
Check cable between main unit and
monitor or Check monitor.
.
Unless specified, 1U-3853-1 A.VIDEO UNIT part.
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Check analog SW settings.
NG Check IC301 and CX073
IC109-9,10,11pin : L(0V)
soldering, or DIGITAL UNIT flaw.
IC109-6pin : L(0V)
OK
Check soldering of IC109.
Check soldering of CX113.
Check soldering of IC305.
Check AMP settings. Check CX155 soldering, or DIGITAL
NG
IC504-7pin : H(5V) UNIT flaw.
OK
Check soldering of IC504.
x a o u 1 6 3
y
i
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8 9
OK
OK
OK
OK
Q Q
3 7 6 3 1 5 1
OK
OK
OK
OK
c o
.
28
AVR-2308CI / AVR-888 / AVR-2308 / AVC-2308
2 4 9 8 2
NG
NG NG
OK
NG
NG
NG
5 0 8 9 2 4 9 8 2
NG
NG
NG NG
OK
m
9 9
9 9