Denon AVR-3805 User manual

SERVICE MANUAL
MODEL AVR-3805
AVC-3890
AV SURROUND RECEIVER / AMPLIFIER
16-11, YUSHIMA 3-CHOME, BUNKYO-KU, TOKYO 113-0034 JAPAN
X0197V.02DE/CDM 0403
For Europe & Asia model
サービスをおこなう前に、このサービスマニュアルを
必ずお読みください。本機は、火災、感電、けがなど
に対する安全性を確保するために､さまざまな配慮を
おこなっており、また法的には「電気用品安全法」に
もとづき、所定の許可を得て製造されております。
従ってサービスをおこなう際は、これらの安全性が維
持されるよう、このサービスマニュアルに記載されて
いる注意事項を必ずお守りください。
本機の仕様は性能改良のため、予告なく変更する
ことがあります。
Please use this service manual with referring to the
operating instructions without fail.
Some illustrations using in this service manual are
slightly different from the actual set.
修理の際は、必ず取扱説明書を参照の上、作業を
行ってください。
本文中に使用しているイラストは、説明の都合上
現物と多少異なる場合があります。
補修用性能部品の保有期間は、製造打切後8年です。
注 意
For purposes of improvement, specifications and
design are subject to change without notice.

2
2AVR3805 / AVC-3890
SAFETY PRECAUTIONS
The following check should be performed for the continued protection of the customer and service technician.
LEAKAGE CURRENT CHECK
Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis
resistance check. If the leakage current exceeds 0.5 milliamps, or if the resistance from chassis to either side of the
power cord is less than 460 kohms, the unit is defective.
(1)
(2)
500V
1M
(1)
(2)

3
3
AVR-3805/ AVC-3890
WIRE ARRANGEMENT ワイヤー整形図
If wire bundles are untied or moved to perform adjustment or
parts replacement etc.,be sure to rearrange them neatly as
they were originally bundled or placed afterward.
Otherwise, incorrect arrangement can be a cause of noise
generation.
Wire arrangement viewed from the top

4
4
AVR-3805 / AVC-3890
CAUTIONINSERVICING
●InitializingAVSURROUNDRECEIVER
AVSURROUNDRECEIVERinitializationshouldbe
performedwhenthemcom,peripheralpartsofmcom,
andDSPP.W.B.arereplaced.
1. Switchofftheunit.
2. HoldthefollowingPUREDIRECTbuttonandDI-
RECTbutton,andswitchontheunit.
3. Checkthattheentiredisplayisflashingwith
anintervalofabout1second,andreleaseyour
fingersfromthe2buttonsandthemicroprocessor
willbeinitialized
Note:・Ifstep3doesnotwork,startoverfromstep1.
・Allusersettingswillbelostandthisfactorysetting
willberecoveredwhenthisinitializationmode.
Somakesuretomemorizeyoursettingfor
restoringaftertheinitialization.
サービス時の注意事項
●AVサラウンドアンプの初期化について
マイコンやマイコン周辺部品、DSP 基板等を交換した場
合は、AV サラウンドアンプの初期化を行って下さい。
1. オン／オフボタンを OFF にします。
2. PUREDIRECTボタンと DIRECTボタンを同時に押
しながら、オン／オフボタンを押して ON にしま
す。
3. ディスプレイ表示が約 1秒間隔で点滅するのを
確認後、2つのボタンから指を離します。
●マイコンが初期化されます。
注意 :・上記 3 の状態にならない場合は、もう一度操作 1
からやり直してください。
 ・初期化を行うとお客様が設定した内容が工場出荷
状態に戻りますので、あらかじめ設定内容を
控えておき初期化後再設定してください。

5
5
AVR-3805/ AVC-3890
ADJUSTMENT 調整
Audio Section
Idling Current (1U-3469-1)
Required measurement equipment: DC Voltmeter
Preparation
(1) Avoid direct blow from an air conditioner or an electric
fan, and adjust the unit at normal room tempereture 15
°C ~ 30 °C (59 °F ~ 86 °F).
(2) Presetting
POWER (Power sourse switch) OFF
SPEAKER (Speaker terminal) No load
(Do not connect speaker, dummy resistor, etc.)
Adjustment
(1) Remove top cover and set VR101, VR102, VR201,
VR301, VR302, VR401, VR402, on 1U-3469-1 (Power
Unit) at fully counterclockwise ( ).
(2) Connect DC Voltmeter to test points (FRONT-Lch:
TP301
1 2
pin, FRONT-Rch: TP101
5 6
pin,
CENTER ch: TP301
3 4
pin, SURROUND-Lch: TP101
3 4
pin, SURROUND-Rch: TP101
1 2
pin,
SURROUND BACK-Lch: TP301
7 8
pin, SURROUND
BACK-Rch: TP301
5 6
pin).
(3) Connect power cord to AC Line, and turn power switch
"ON".
(4) Presetting.
MASTER VOLUME : "---" counterclockwise ( min.)
MODE : 7CH STEREO
FUNCTION : CD
(5) Allow 2 minutes, and turn VR101 clockwise ( ) to
adjust the TEST POINT voltage to 6.5 mV ±0.5 mV DC.
(6) After 10 minutes from preset, turn VR101 to set the
voltage to 8 mV ±0.5 mV DC.
(7) Adjust the Variable Resistors of other channels in the
same way.
(8) After 5 minutes from (6), turn VR101 to set the voltage to
8 mV ±0.5 mV DC.
(9) Adjust the Variable Resistors of other channels in the
same way.
(1U-3469-1)
: DC Voltmeter
(1)
15 30
(2)
OFF

( )
(1) 1U-3469-1
VR101, VR102, VR201, VR301, VR302, VR401, VR402
( )
(2) (FRONT-Lch: TP301
1 2
pin, FRONT-
Rch: TP101
5 6
pin, CENTER ch: TP301
3 4
pin,
SURROUND-Lch: TP101
3 4
pin, SURROUND-Rch:
TP101
1 2
pin, SURROUND BACK-Lch: TP301
7 8
pin, SURROUND BACK-Rch: TP301
5 6
pin) DC
Voltmeter
(3) AC100V 95 105V
"ON"
(4) ON
MASTER VOLUME
( )
SPEAKER
MODE : 7CH STEREO
FUNCTION : CD
(5) 2 VR101 ( )
6.5mV ±0.5mV DC
(6) 10 VR101
8mV ±0.5mV DC
(7)
(8) (6) 5VR101
8mV ±0.5mV DC
(9)

6
6
AVR-3805/ AVC-3890
DC Voltmeter
FL ch
C ch
SBR ch
SBL ch
VR402
VR401
SBR ch
SBL ch
VR102
FR ch
VR101
FL ch
VR201
SR ch
SL ch
FR ch
C ch
VR301
SL ch
VR302
SR ch
TP301
TP101
Audio Section

7
7
AVR-3805/ AVC-3890
Video Section
Component Video Level Adjustment
Required measurement equipment etc: Oscilloscope, DVD
VIDEO PLAYER (ex: DVD-1500)
Test Disc: DVD T-S01
Preparation
(1) Avoid direct blow from an air conditioner or an electric
fan, and adjust the unit at normal room temperature 15
°C ~ 30 °C (59 °F ~ 86 °F).
(2) Playback the color-bar 75% of the Test Disc (Title 12)
using the DVD Video Player, and check that Y and C
levels of the S terminal output are within the specified
output levels.
If they are out of the specified levels, adjust with the
variable resister inside of the unit.
(3) Presetting
POWER (Power source switch) OFF
SPEAKER (Speaker terminal) No load
(Do not connect speaker, dummy resistor, etc.)
DVD (Video terminal) No input
Adjustment
(1) Remove top cover and set VR101, VR102, VR103 on
1U-3475-1 (Convert Unit) at fully counterclockwise ( ).
(2) Connect a pin-plug terminated with 75-ohms to Y(Cb,
Cr) of the Component Video Monitor Output, and hook
up the Oscilloscope's probe to both ends of the pin-plug.
(3) Connect S terminal output of the DVD Player with the
DVD input terminal of the Receiver.
(4) Connect power cord to AC Line, and turn power switch
"ON".
(5) Presetting
FUNCTION: DVD

Playback the color-bar 75% of the Test Disc (Title 12)
(6) Turn VR101 clockwise ( ) to adjust the
COMPONENT VideoY voltage (except H.Sync) to 714
±50 mVp-p. (Refer to Fig.1)
(7) Adjust the Variable Resistors of Cb: VR102 and Cr:
VR103 in the same way. (Refer to Fig. 2, 3)
Cb,Cr: 486±50 mVp-p. (U.S.A. & Canada model)
525±50 mVp-p. (Others)
: Oscilloscope, DVD VIDEO PLAYER
(: DVD-1500)
: DVD T-S01
(1)
15 30
(2) DVD VIDEO PLAYER
75 (Title12) S Y C
(3)
OFF

( )
DVD
(1) 1U-3475-1
VR101, VR102, VR103 ( )
(2) Y(Cb, Cr) 75
Oscilloscope
(3) DVD VIDEO PLAYER SDVD
(4)
"ON"
(5) ON
FUNCTION DVD
75 (Title12)
(6) VR101 ( )
Y(H.Sync )(Fig.1 )
714mV ±50mVp-p
(7) Cb: VR102 Cr: VR103
(Fig.2 3 )
Cb,Cr: 525±50 mVp-p.

8
8
AVR-3805/ AVC-3890
VR102
VR101
VR103Cr
Cb
Oscilloscope
Component Video Y
Video Section

9
9
AVR-3805/ AVC-3890
714±50mV
p-p
Volts IRE:FLT Y-Signal
-20.0 -10.0 0.0 10.0 20.0 30.0
0.5 0.0
100.0
0.5
40.0 50.0 60.0
486±50mV (U.S.A. & Canada model)
p-p
525±50mV (Others)
p-p
Volts IRE:FLT
0.0 20.0 40.0
-0.5
-50.0
50.0
0.0
0.5
0.0
60.0 80.0
486±50mV (U.S.A. & Canada model)
p-p
525±50mV (Others)
p-p
Volts IRE:FLT
0.0 20.0 40.0
-0.5
-50.0
50.0
0.0
0.5
0.0
60.0 80.0
Fig.1 Component Video Y signal
Fig.2 Cb signal
Fig.3 Cr signal

10
10
AVR-3805 /AVC-3890
AUDIO BLOCK DIAGRAM
RECOUT
INPUT
DENON LINK (3rd EDITION)
COAX1
OPT1
&+4
&+4
&+4
DL SL/SR
DL C/SW
DL FL/FR
DSP
D/A
PCM179
1A
D/A
PCM179
1A
＋
MUTE
＋
MUTE
PLD
ADSP-21266 EPM3032A
D/A
PCM179
1A
D/A
PCM179
1A
MUTE
MUTE
MUTE
MUTE
MUTE
MUTE
FL
C
SBR
SL
FR
SW
SR
SBL
SL/FL
DSD_SL
FR/SR
DSD_FR
SBL/C
DSD_SBL
SW/SBR
DSD_SW
PCM_SL/FL
DSD_SL
PCM_FR/SR
DSD_FR
PCM_SBL/C
DSD_SBL
PCM_SW/SBR
DSD_SW
−−
−A/D
PCM180
4
㧙
㧗
ADDATA
＋
＋
＋
＋
＋
＋
8ch
EXT.IN
−
＋
MUT
MUT
MUT
MUT
MUT
MUT
MUT
−
＋
−
＋
−
＋
−
＋
−
＋
−
＋
−
＋
FR
SW
SL
SR
SBL/ZONE3L
ZONE2L
ZONE2R
FL
C
SBR/ZONE3R
INPUT
PHONO
CD
DVD
VDP
TV
DBS
V-AUX
VCR-1
VCR-2
CDR
FR
SW
SL
SR
SBL
FL
C
SBR
MUT
MUT
MUT
MUT
MUT
MUT
MUT












FR
SL-A
SR-A
SBL/
ZONE3L
ZONE3R
FL
C
SBR/






SL-B
SR-B
RECOUT
VCR-1
VCR-2
CDR
＋
＋
Rch
AUDIO
SELECT
＋
＋
COAX2
OPT2
OPT3
OPT4
OPT5
OPT6
INPUT
SELECT
REC
SELECT
FL
C
SBR
SL
FR
SW
SR
SBL
E.Vol TC94A32FG
㧗
EQ
EXT-SBR
EXT-SBL
EXT-SL
EXT-FL
EXT-FR
EXT-SR
EXT-C
EXT-SW
FL
SL
FR
SR
SBL
C
SBR
SW
FLlarg
FLsmal
FRlarg
FRsma
ZONE3L
ZONE3R
LC89057W-VF4-E
LC89057W-VF4-E
LC89057W-VF4-E
−
＋
−
＋
−
＋
−
＋
−
＋
−
＋
−
＋
−
＋
TC9459F
SIGNAL SELECTOR
TC9274N-017
MUT
MUT
MUT
H/P
H/P L
H/P R
＋ ＋
MIC
MIC
V-AUX
ZONE1
ZONE2
ZONE3
ZONE2L
ZONE2R
TC94A46FG
DSD_SR
DSD_C
DSD_SBR
DSD_FL
DSD_SBR
DSD_C
DSD_SR
DSD_FL
LINEOUT
ZONE3L
ZONE3R
MUT
MUT
TUNER
TUNER
H/POUT
SPOUT
PREOUT
Except
Japan
model
＋
＋
＋
＋
＋
＋
＋
Lch
AUDIO
SELECT
−−
−㧙
㧗
Japan
model