Denon AVR-1909 Service Manual page 29

D
Input
CVBS/S
Check power supply voltage
+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
To troubleshooting of HDMI/DVI
Unless specified, VIDEO UNIT part.
E
Input
COMPONENT
Check power supply voltage
+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 Y : C1281
Input Cb : C1273
Input Cr : C1271
Check soldering of VIDEO CNT UNIT
OK
To troubleshooting of HDMI/DVI
Unless specified, VIDEO UNIT part.
Check power supply voltage
+3.3 : IC1015-O,IC1017-IN To troubleshooting 1.1
NG
+1.8V : IC1016,IC1017-O Power not turn on.
Check input of input selector
and Video AMP, surrounding
NG circuitry soldering.
V : CP1006-11pin : H(+5V)
Input : IC2002,IC2003,IC2004
Y : CP1006-12pin : H(+5V)
Video AMP : IC2008,IC2001,IC2005
or CPU UNIT flaw.
OK
connector base, and check poor
contacts.
Check power supply voltage
+9V : CN2005-9pin
NG To troubleshooting 1.1
+3.3 : IC1015-O,IC1017-IN
Power not turn on.
+1.8V : IC1016,IC1017-O
Check input of input selector
and Video AMP, surrounding
circuitry soldering.
NG
Y : CP1006-12pin : H(+5V) Input : IC2023
Video AMP : IC2021
or CPU UNIT flaw.
OK
connector base, and check poor
contacts.
OK
OK
OK
OK
29
AVR-1909/789, AVC-1909
NG
NG NG
OK
NG
NG NG
OK