Denon AVR-1908 Service Manual

21
AVR-1908 / AVR-788
2.2. VCR MONITOR OUT(CVBS) Output NG
※ Unless specified, VIDEO UNIT part.
VCR/DVR MONITOR OUT(CVBS) Output NG.
※ When checking operation, select
DVD for the function.
Input
CVBS
Input
S
Input
COMPONENT
VCR : C No output No output
C
Input
CVBS
Check ± 5V.
+5V : CP706 / 2pin
-5V : CP706 / 3pin
NG
To troubleshooting 1.1 Power not turn
on.
OK
Check input/output of video SW.
Input : IC2002 / 12pin
Output : IC2002 / 14pin
NG
Check video SW settings.
IC2002 - 8pin: L
IC2002 - 9pin: H
NG
Check soldering of IC2003.
OK
OK
Check soldering of IC2002.
Check
a cable between the main unit -
monitor or the monitor.
2.2. VCRMONITOROUT(CVBS) 出力 NG
※ 特に記載がない場合は VIDEO基板の部品です。
VCR/DVRMONITOROUT(CVBS) 出力 NG ※ 動作を確認する時はファンクショ
ンを DVD に選択してください。
入力
CVBS
入力
S
入力
COMPONENT
VCR:C 出力されません 出力されません
C
入力（CVBS）
±5Vの確認
+5V:CP706/2pin
-5V:CP706/3pin
NG
1.1 電源が入らないのﾄﾗﾌﾞﾙｼｭｰﾃｨﾝｸﾞへ
OK
ビデオSW の入出力確認
入力 :IC2002/12pin
出力 :IC2002/14pin
NG
ビデオSW の設定確認
IC2002-8pin:L
IC2002-9pin:H
NG
IC2003 のハンダ付け確認
OK
OK
IC2002 のハンダ付け確認
本体 - モニター間のケーブル
もしくは、モニターの確認

Denon AVR-1908 Specifications

General

Channels	7.1
Power Output	90W per channel (8 ohms, 20Hz-20kHz, 0.08% THD)
HDMI Inputs	2
HDMI Outputs	1
Dolby Digital	Yes
DTS	Yes
Type	AV Receiver
Component Video Inputs	3
Component Video Outputs	1
Digital Audio Inputs	2 Optical, 2 Coaxial
Tuner	AM/FM
Frequency Response	10Hz-100kHz (+1, -3dB)
Input Sensitivity/Impedance	200mV/47k ohms
Signal-to-Noise Ratio	98 dB
Power Consumption	460W
Surround Sound Formats	Dolby Digital, DTS
Total Harmonic Distortion	0.08%
Tuner Frequency Range	AM: 522-1611 kHz, FM: 87.5-108.0 MHz
Standby Power Consumption	Less than 1W