Denon AVR-988 Service Manual

35
AVR-2808CI / AVR-988
※ Unless specified, 1U-3839-1 A.VIDEO UNIT part.
R
Input
CVBS
1U-3839-1 A.VIDEO UNIT
Check ± 5VA.
+5VA : CX078-3,4pin
-5VA : CX078-5pin
NG
To troubleshooting 1.1 Power not turn
on.
OK
Check input/output of analog SW.
Input : IC109-13pin
Output : IC109-3pin
NG
Check analog SW settings.
IC109-9,10,11pin : L(0V)
IC109-6pin : L(0V)
NG
Check IC301, IC304 and CX073
soldering, or DIGITAL UNIT flaw.
OK
OK
Check soldering of IC109.
Check input/output of AMP.
Input : IC115-5pin
Output : IC115-7pin
NG
Check soldering of IC115 and
surrounding parts.
OK
Check output to 1U-3838 DIGITAL UNIT.
Output V : CX123-5pin
NG
Check soldering of CX123.
OK
To troubleshooting 3.HDMI/DVI.
※ 特に記載がない場合は 1U-3839-1A.VIDEOUNITの部品です。
R
入力
CVBS
1U-3839-1A.VIDEOUNIT
± 5VAの確認
+5VA:CX078-3,4pin
-5VA:CX078-5pin
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
ｱﾅﾛｸﾞ SW の入出力確認
入力:IC109-13pin
出力:IC109-3pin
NG
ｱﾅﾛｸﾞ SW の設定確認
IC109-9,10,11pin:Ｌ(0V)
IC109-6pin:Ｌ(0V)
NG
IC301,IC304,CX073 のﾊﾝﾀﾞ付け確認
もしくは DIGITALUNIT の不具合
OK
OK
IC109 のﾊﾝﾀﾞ付け確認
AMP の入出力確認
入力:IC115-5pin
出力:IC115-7pin
NG
IC115及び 周 辺部 品 の
ﾊﾝﾀﾞ付け確認
OK
1U-3838DIGITALUNIT への出力確認
出力 V:CX123-5pin
NG
CX123 のﾊﾝﾀﾞ付け確認
OK
3.HDMI/DVI のﾄﾗﾌﾞﾙｼｭｰﾃｨﾝｸﾞへ

Denon AVR-988 Specifications

General

Brand	Denon
Model	AVR-988
Category	Receiver
Language	English