Denon AVR-2308CI Service Manual page 22

Q Q
3 7 6 3 1 5 1 5 0
I
Input
COMPONENT
1U-3853-1 A.VIDEO UNIT
Check 5VA. To troubleshooting 1.1 Power not turn
NG
+5VA : CX077-3,4pin on.
-5VA : CX077-5pin
OK
Check input/output of COMPONENT
selector.
Input Y : IC501-48pin
Input Cb : IC501-2pin Check IC501,CX112 and CX155 sol-
NG
Input Cr : IC501-4pin dering, or DIGITAL UNIT flaw.
Output Y : IC501-34pin
Output Cb : IC501-32pin
Output Cr : IC501-30pin
OK
Check input/output of AMP.
Input Y : IC503-1pin
Input Cb : IC503-3pin
NG
Input Cr : IC503-5pin
Output Y : IC503-13pin
Output Cb : IC503-11pin
Output Cr : IC503-9pin
Check soldering of IC503 and
OK
surrounding parts.
Check output to 1U-3852 DIGITAL UNIT.
T E
L 1 3 9 4 2 2 9 6 5 1 3
Output Y : CX112-3pin
NG
Output Cb : CX112-1pin
Output Cr : CX112-5pin
OK
Check input of video driver
Check CX112 soldering, or DIGITAL
NG
Input Y : IC305-2pin
UNIT flaw.
Input C : IC305-4pin
OK
Check output of video driver.
NG
Output Y : IC305-34pin
Output C : IC305-32pin
OK
Check input/output of analog SW.
Input Y : IC104-5pin
NG
Input C : IC104-14pin
Output Y : IC104-3pin
Output C : IC104-13pin
OK
Check input/output of AMP.
Input Y : IC111-3pin
NG
Input C : IC111-5pin
Output Y : IC111-1pin
Output C : IC111-7pin
w w w
OK
Check cable between main unit and
monitor or Check monitor .
.
Unless specified, 1U-3853-1 A.VIDEO UNIT part.
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Check AMP settings. Check CX155 soldering, or DIGITAL
NG
IC503-7pin : H(5V) UNIT flaw.
OK
Check soldering of CX112.
Check soldering of IC305.
Check analog SW settings.
Check IC301 and CX073 soldering, or
NG
IC104-10pin : H(+5V)
DIGITAL UNIT flaw.
IC104-9pin : L(0V)
OK
Check soldering of IC104.
Check soldering of IC111.
x a o u 1 6 3
y
i
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8 9
OK
OK
OK
Q Q
3 7 6 3 1 5 1
OK
OK
OK
OK
OK
c o
.
22
AVR-2308CI / AVR-888 / AVR-2308 / AVC-2308
2 4 9 8 2
NG
NG
NG NG
OK
NG
5 0 8 9 2 4 9 8 2
NG
NG
NG NG
OK
NG
m
9 9
9 9