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Denon AVR-1908 Service Manual

Denon AVR-1908
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27
AVR-1908 / AVR-788
Unless specified, VIDEO UNIT part.
G
Input
CVBS
Check ± 5V and +9V.
+5V : CP706 / 2pin
-5V : CP706 / 3pin
+9V : CP706 / 1pin
NG
To troubleshooting 1.1 Power not turn
on.
OK
Check input/output of video SW.
Input : IC2002 / 12pin
Output : IC2002 / 1pin
NG
Check video SW settings.
IC2002 - 15pin: H
IC2002 - 11pin: L
NG
Check soldering of IC2003.
OK
OK
Check soldering of IC2002.
Check input/output of MPX.
Input : IC2007 / 1pin
Output : IC2007 / 15pin
NG
Check MPX settings.
IC2007 - 9pin: H
IC2007 - 10pin: L
NG
Check soldering of IC2003.
OK
OK
Check soldering of IC2007.
Check input/output of AMP
Input : IC2010 / 5pin
Output : IC2010 / 7pin
NG
Check soldering of IC2010.
OK
Check input/output of video driver
Input : IC2017 / 5pin
Output : IC2017 / 7pin
NG
Check soldering of IC2017.
OK
Check imput/output of video driver.
Input Y : IC2016 / 11pin
Input Cb : IC2016 / 13pin
Input Cr : IC2016 / 15pin
Output Y : IC2016 / 24pin
Output Cb : IC2016 / 21pin
Output Cr : IC2016 / 18pin
NG
Check soldering of IC2016.
OK
Check input/output of V-SEL.
Input Y : IC2015 / 36pin
Input Cb : IC2015 / 38pin
Input Cr : IC2015 / 40pin
Output Y : IC2015 / 27pin
Output Cb : IC2015 / 24pin
Output Cr : IC2015 / 21pin
NG
Check soldering of IC2015.
OK
Check input/output of AMP.
Input Y : IC2024 / 1pin
Input Cb : IC2024 / 3pin
Input Cr : IC2024 / 5pin
Output Y : IC2024 / 13pin
Output Cb : IC2024 / 11pin
Output Cr : IC2024 / 9pin
NG
Check soldering of IC2013.
OK
Check a cable between the main unit -
monitor or the monitor.
特に記載がない場合は VIDEO基板の部品です。
G
入力(CVBS)
± 5V,+9V の確認
+5V:CP706/2pin
-5V:CP706/3pin
+9V:CP706/1pin
NG
1.1 電源が入らないのトラブルシューティングへ
OK
ビデオSW の入出力確認
入力 :IC2002/12pin
出力 :IC2002/1pin
NG
ビデオSW の設定確認
IC2002-15pin:H
IC2002-11pin:L
NG
IC2003 のハンダ付け確認
OK
OK
IC2002 のハンダ付け確
MPX の入出力確認
入力 :IC2007/1pin
出力 :IC2007/15pin
NG
MPX の設定確認
IC2007-9pin:H
IC2007-10pin:L
NG
IC2003 のハンダ付け確認
OK
OK
IC2007 のハンダ付け確
AMP の入出力確認
入力 :IC2010/5pin
出力 :IC2010/7pin
NG
IC2010 のハンダ付け確
OK
ビデオドライバの入出力確認
入力 :IC2017/5pin
出力 :IC2017/7pin
NG
IC2017 のハンダ付け確
OK
ビデオドライバの入出力確認
入力 Y:IC2016/11pin
入力 Cb:IC2016/13pin
入力 Cr:IC2016/15pin
出力 Y:IC2016/24pin
出力 Cb:IC2016/21pin
出力 Cr:IC2016/18pin
NG
IC2016 のハンダ付け確
OK
V-SEL の入出力確認
入力 Y:IC2015/36pin
入力 Cb:IC2015/38pin
入力 Cr:IC2015/40pin
出力 Y:IC2015/27pin
出力 Cb:IC2015/24pin
出力 Cr:IC2015/21pin
NG
IC2015 のハンダ付け確
OK
AMP の入出力確認
入力 Y:IC2024/1pin
入力 Cb:IC2024/3pin
入力 Cr:IC2024/5pin
出力 Y:IC2024/13pin
出力 Cb:IC2024/11pin
出力 Cr:IC2024/9pin
NG
IC2013 のハンダ付け確
OK
本体 - モニター間のケーブル
もしくは、モニターの確認

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Denon AVR-1908 Specifications

General IconGeneral
Channels7.1
Power Output90W per channel (8 ohms, 20Hz-20kHz, 0.08% THD)
HDMI Inputs2
HDMI Outputs1
Dolby DigitalYes
DTSYes
TypeAV Receiver
Component Video Inputs3
Component Video Outputs1
Digital Audio Inputs2 Optical, 2 Coaxial
TunerAM/FM
Frequency Response10Hz-100kHz (+1, -3dB)
Input Sensitivity/Impedance200mV/47k ohms
Signal-to-Noise Ratio98 dB
Power Consumption460W
Surround Sound FormatsDolby Digital, DTS
Total Harmonic Distortion0.08%
Tuner Frequency RangeAM: 522-1611 kHz, FM: 87.5-108.0 MHz
Standby Power ConsumptionLess than 1W

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