Denon AVR-789 Service Manual page 25

Q Q
A
3 7 6 3 1 5 1 5 0
Input
CVBS/S
Check power supply voltage
VIDEO UNIT
+5V : CN2005-8pin
-5V : CN2005-7pin
MC_+5V : CN2001-5pin
OK
Check input of HDMI UNIT video decoder
signal. Check VIDEO CNT UNIT signal DET.
NG
Input V : C1272
Input Y : C1270
Input C : C1274
Check soldering of VIDEO CNT UNIT
OK connector base, and check poor
Check output of driver(IC1018)
Check output of after HDMI UNIT
after HDMI UNIT video encoder.
OutputV : CN1008 7pin
OutputY : CN1008 11pin
NG
Output C : CN1008 9pin
Output Y : CN1009 9pin§
Output Cb : CN1009 11pin
Output Cr : CN1009 13pin
T E
L 1 3 9 4 2 2 9 6 5 1 3
OK
CVBS/S output
Check soldering of output selector
Check output of AMP.
and surrounding circuitry. Check sol-
Output V : IC2016-24pin NG
dering of VIDEO CNT UNIT connec-
Output Y : IC2016-20pin
Output C : IC2016-22pin
OK
Check cable between main unit
and monitor or Check monitor.
Check input of input selector
and surrounding circuitry soldering.
NG
Input : IC2023
or CPU UNIT flaw.
w w w
Unless specified, VIDEO UNIT part.
.
Check power supply voltage
HDMI UNIT
NG To troubleshooting 1.1
+3.3V : IC1015-O,IC1017-IN
Power not turn on.
+1.8V : IC1016,IC1017-O
Check input of input selector
and Video AMP, surrounding
NG circuitry soldering.
V : CP1006-11pin : H(+5V)
Input : IC2002,IC2003,IC2004
Y : CP1006-10pin : H(+5V)
Video AMP : IC2008,IC2001,IC2005
or CPU UNIT flaw.
OK
contacts.
video encoder. Check input of HDMI UNIT Video
OutputY : C1245 -side§ Decoder(IC1020)/
NG
Output C : C1243 Encoder(IC1019) and surrounding
Output Y : C1257 -side§ circuitry soldering.
Output Cb : C1260 -side§ or CPU UNIT flaw.
Output Cr : C1265 -side§
OK
Check soldering of IC1015 and
surrounding parts.
COMPONENT output
tor base.
Output : IC2014,IC2015
Check input of AMP Check output of AMP
Input Y : C2123 +side§ Output Y : IC2022-13pin
NG
Input Cb : C2131 +side§ Output Cb : IC2022-11pin
Input Cr : C2136 +side§ Output Cr : IC2022-9pin
OK
Check soldering of IC2022 and Check cable between main unit
surrounding parts. and monitor or Check monitor.
x a o
y
i
http://www.xiaoyu163.com
8
OK
OK
Q Q
3 7 6 3
OK
CVBS/S
OK
OK
u 1 6 3
.
25
AVR-1909/789, AVC-1909
http://www.xiaoyu163.com
9 2 4 9 8
NG
NG NG
OK
NG NG
OK
1 5 1 5 0 8 9 2 4
NG
NG NG
OK
m
c o
2 9 9
9 8 2 9 9
COMPONENT
OK