Denon AVR-785 User manual

SERVICE MANUAL
MODEL AVR-1905/785
AV SURROUND RECEIVER
AVC-1590
AV SURROUND AMPLIFIER
For U.S.A., Canada, Europe,
U.K., Asia, China, Taiwan R.O.C.,
Korea & Japan model
TOKYO ,JAPAN
X0214 V.01 DE/CDM 0407
Some illustrations using in this service manual are
slightly different from the actual set.
●
Please use this service manual with referring to the
operating instructions without fail.
●
For purposes of improvement, specifications and
design are subject to change without notice.
●
●
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。
●
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。
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。
●
補修用性能部品の保有期間は、製造打切後8年です。
注 意
Ver. 1

2
AVR-1905/785 AVC-1590
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
AVR-1905/785 AVC-1590
DIMENSION

4
AVR-1905/785 AVC-1590
CAUTION IN SERVICING
Initializing AV SURROUND RECEIVER
AV SURROUND RECEIVER initialization should be performed
when the µcom, peripheral parts of µcom, and Digital P.W.B. are
replaced.
1. Switch off the unit.
2. Hold the following SPEAKERS-A button and SPEAKERS-B
button, and switch on the unit.
3. Check that the entire display is flashing with an interval of
about 1 second, and release your fingers from the 2 buttons
and the microprocessor will be initialized.
Note:・If step 3 does not work, start over from step 1.
・Allusersettingswillbe lostand this factory setting 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、Digital 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. SPEAKERS-A ボタンと SPEAKERS-B 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
AVR-1905/785 AVC-1590
ADJUSTMENT
Audio Section
Idling Current
Required measurement equipment: DC Voltmeter
1. Preparation
(1) Avoid direct blow from an air conditioner or an electric
fan,andadjusttheunitat normal roomtemperature 15°C
~ 30 °C (59 °F ~ 86 °F).
(2) Presetting
• POWER (Power source switch) OFF
• SPEAKER (Speaker terminal) No load
(Do not connect speaker, dummy resistor, etc.)
2. Adjustment
(1) Remove top cover and set VR101, VR102, VR103,
VR104, VR105, on Amp. Unit, VR106 on SURR.-BACK
ch Amp. Unit at fully counterclockwise ( ) position.
(2) Connect DC Voltmeter to test points (FRONT-Lch:
TP104, FRONT-Rch: TP105, CENTER ch: TP103, SUR-
ROUND-Lch: TP101, SURROUND-Rch: TP102, SUR-
ROUND-BACK Lch: TP106,SURROUND-BACK Rch:
TP107).
(3) Connect power cord to AC Line, and turn power switch
"ON".
(4) Presetting.
MASTER VOLUME: "---" counterclockwise ( min.)
MODE : 6CH STEREO
FUNCTION : CD
(5) Within 2 minutes after the power on, turn VR101 clock-
wise ( ) to adjust the TEST POINT voltage to 1.5 mV
± 0.5 mV DC.
(6) After 10 minutes from the preset above, turn VR101 to
set the voltage to 2.5 mV ± 0.5 mV DC.
(7) Adjust the Variable Resistors of other channels in the
same way.
VR104
TP104
VR101,TP101
TP106
VR107SBL
TP107
VR107SBR
VR103,TP103
VR102
TP102
VR105
TP105
F Lch
S Lch
S Back Lch
S Back Rch
C ch
S Rch
F Rch
DC Voltmeter
調整
オーディオセクション
アイドリング電流の調整
調整に必要な測定器 : DCVoltmeter
1. 準備
(1) セットをクーラ、扇風機のそばなど風通しの良い場所
を避け、通常の使用状態に置きます。セットの周囲温
度は 15〜30 ℃、湿度は常湿とします。
(2) プリセット
・電源スイッチ OFF
・スピーカ端子 無負荷
( スピーカ・ダミー抵抗器などを接続しない。)
2. 調整
(1) 上カバーをはずし、パワーアンプ基板の VR101,VR102,
VR103,VR104,VR105 及び SURR.-BACK アンプ基板の
VR106 を反時計方向 ( )に回し切った状態にセット
します。
(2) テストポイント (FRONT-Lch:TP104,FRONT-Rch:
TP105,CENTERch:TP103,SURROUND-Lch:TP101,
SURROUND-Rch:TP102,SURROUND-BACKLch:
TP106,SURROUND-BACKRch:TP107) に DCVoltmeter
を接続します。
(3) 電源コードを AC100V（95〜105Vの範囲でも可）に接
続し、電源スイッチを "ON"にします。
(4) ON後、次のようにセットします。
・MASTERVOLUME（音量調節つまみ）→反時計方向
( )に回す、最小の状態にする。
・SPEAKER（スピーカ端子）→無負荷（スピーカ、
ダミー抵抗器などを接続しない。）
MODE:6CHSTEREO
FUNCTION:CD
(5) 2分以内に VR101を時計方向 ( ) に回しテストポイ
ントの電圧を次のように調整します。
1.5mV ±0.5mVDC
(6) 予備調整から 10分後 VR101を回し、次のように電圧を
設定します。
2.5mV± 0.5mVDC
(7) 同じ方法で各チャネルの可変抵抗を調整します。

6
AVR-1905/785 AVC-1590
Video Section
Component Video Level Adjustment
Required measurement equipment etc.: Oscilloscope, DVD
VIDEO PLAYER (ex: DVD-1500)
Test disc: DVD T-S01
1. Preparation
(1) Avoid direct blow from an air conditioner or an electric
fan,andadjusttheunitat normal roomtemperature 15°C
~ 30 °C (59 °F ~ 86 °F).
(2) Playback the color-bar 75% of the Test Disc (Title 12) us-
ing 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 vari-
able 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
2. Adjustment
(1) Remove top cover and set VR601, VR602, VR603, on C-
S VIDEO2 Unit at fully counterclockwise ( ).
(2) Connectapin-plugterminatedwith75-ohms toY(Cb,Cr)
ofthe Component Video MonitorOutput, andhook 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) TurnVR601clockwise( )toadjusttheCOMPONENT
Video Y voltage (except H. Sync) to 714 ± 50 mVp-p. (Re-
fer to Fig. 1)
(7) Adjust the Variable Resistors of Cr: VR602 and Cb:
VR603 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)
ビデオセクション
コンポーネントビデオレベルの調整
調整に必要な測定器 : Oscilloscope,DVDVIDEOPLAYER
( 例 :DVD-1500)
テストディスク : DVDT-S01
1. 準備
(1) セットをクーラ、扇風機のそばなど風通しの良い場所
を避け、通常の使用状態に置きます。セットの周囲温
度は 15〜30 ℃、湿度は常湿とします。
(2) DVDVIDEOPLAYER でテストディスクのカラーバー
75%(Title12) を再生し、S 端子出力 Y、C レベルが正規
の出力レベルであることを確認する。正規の出力レベ
ルでない場合は、セット内部の可変抵抗器で調整して
ください。
(3) プリセット
・電源スイッチ OFF
・スピーカ端子 無負荷
( スピーカ・ダミー抵抗器などを接続しない。)
・DVD 入力端子 無入力
2. 調整
(1) 上カバーをはずし、C-SVIDEO2 ユニットの VR601,
VR602,VR603 を反時計方向 ( )に回し切った状態に
セットします。
(2) コンポーネントビデオモニターアウトの Y(Cb,Cr) に
75Ω で終端したピンプラグを接続し、その両端を
Oscilloscope のプローブでつまみます。
(3) DVDVIDEOPLAYER の S 端子出力を本機の DVD 入力端
子に接続します。
(4) 電源コードを電源コンセントに接続し、電源スイッチ
を "ON"にします。
(5) ON後、次のようにセットします。
・本機の FUNCTION を DVD にする。
・テストディスクのカラーバー 75%(Title12) を再生す
る。
(6) VR601を時計方向 ( ) に回しコンポーネントビデオ
Y(H.Sync を除く ) の電圧を調整します。(Fig.1 参照 )
714mV ±50mVp-p
(7) 同じ方法で Cr:VR602、Cb:VR603 の可変抵抗器を調整
します。(fig.2、3 参照 )
Cb,Cr:525± 50mVp-p

7
AVR-1905/785 AVC-1590
Oscilloscope
MONITOR OUT
(Y,Cb,Cr)
Video Section
VR902VR901
VR903
Cb
Cr
Y

8
AVR-1905/785 AVC-1590
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
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
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

9
AVR-1905/785 AVC-1590
BLOCK DIAGRAM
SW
FL
LR
+
+
-
Y
-
+
+
+
-
+
-
+
-
+
-
+
R
SR
C
SL
FR
CD
FM
MCLK
DSDATA1 DSDATA3
DACFRSRDATA
-
-
Cr
-
-
+
+
+
+
-
+
+
-
+
-
+
-
+
SL
SR
C
SW
FL
FR
L
DAI_P10(77) DAI_P13(80) DAI_P16(82)
Cb
-
+
+
-
FROM
Lock Detect
&
IF AMP
BSE
AUDIO
ADIN
SLRCK(23)
RDATA(21)
ADC
fs
64fs
256fs
MUTING
VOLUME
VOLUME
VOLUME
CONTROL PORT
CLKIN
VCR
DAC
DAC
DAC
CLOCK
CXA1511M
+
+
+
Y/C
Y/Cb/Cr
MICOM
Y
+6V
DATA
SBL
SR
EX_SR
DSP_FR
EX_FL
RESONATOR
OP AMP
TUNER
OP AMP
+5V
DSP
VIDEO
7805
+3.3V
7805
LC75721NE
+
+
+
+
SBR
SURR L
E3 ONLY
FRONT IN
DIGITAL IN
DIGITAL OUT
+
R
L
X-TAL
Selector
INPUT
IF FILTER
MICOM
DIR
HPF
COUT
CCLK
(24)
Selector
DATA
IF FILTER
ABCLK ALRCK DBCLK
RAM
128k X 8
ROM
128k X 8
L.P.F
MPX IC
IF IC
DIGITAL
FILTER
DSDATA2 DSDATA4
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
DAI_P12(79)
DAI_P11(78)
TV/DBS
DVD/VDP
RMC OUT
RMC IN
DVD/VDP
VCR OUT
VCR
TV/DBS
DVD/VDP
DIGITAL
FILTER
DAC
DIGITAL
FILTER
DAC
DIGITAL
FILTER
DAC
DIGITAL
FILTER
DAC
DIGITAL
FILTER
DAC
DIGITAL
FILTER
DSP
BA7626
VIDEO INPUT
+
+
+
+
+
DACSBLCDATA DACSWSBDATA DACFLSLDATA
CLKIN(142)
MUTE
OSD
SEPARATE
FROM
Cr
TUNER PLL
MUTE
SBR
EX_C
SW
SL
EX_SL
EX_FR
CENTER
ANA_IN
DSP_FL
ANA_IN
12MHz
MAIN -B
MAIN +B
RELAY
CODEC
DIR
VIDEO
MICOM
7812
7915
7815
7809
7906
7806
FL DRIVER
+
+
+
+
MUTE
SBL
SBR
SBL
CENTER
FL
FL
FR
GND
ANALOG IN
ANALOG IN
-
XMCK
DeModulate
CIN
ADC
FM&AM
DIGITAL
FILTER
<AVR1905 ONLY>
DAI_P20(94)
VCR OUT
VCR
TV/DBS
DIGITAL
FILTER
DIGITAL
FILTER
DAI_P9(71) DAI_P15(81) DAI_P14(81)
TA1270
Cb
EX_SW
VIDEO
+1.2V
7805
-VKK
SURR R
FR
TUNER
FROM u-COM
FRONTEND
<AVC1590 ONLY>
REC_SWITCHIG
12.288MHZ
LC89057W-VF4
SDOUT
DACRST I/O PORT
CLATCH
SBCK(22)
( Y, B-Y, R-Y )
COMPONENT,D-VIDEO VIDEO INPUT
TC90A69F
NJM2274
S-VIDEO INPUT
MIXING
25MHZ
FLAG2(97)
MISO(126)
RESET(121)
INPUT/VOL
INPUT/VOL
MULTI_R
CXP740096
KEY_MATRIX
FILAMENT AC
DATA
16-ST-66GNK
AM ANT
FM ANT
TUNER PART
6CH_INPUT
V.AUX L/R
V.AUX VIDEO
CDR/TAPE
VCR
ANALOG OUT
CDR/TAPE
VCR
TV/DBS
DVD/VDP
OPTICAL 2
OPTICAL 1
COAXIAL
OPTICAL
PLL CIRCUITLOOP FILTER
AM TUNING
BD3811K1
TC9273-004
AD1837
AUDIO CODEC
SELCLK
ERRMUTE SERIAL DATA
DLRCLK
DIRERR
ASDATA
VIDEO SWITCH
BA7625*1,BA7626*2
+5.6V(CPU)
Q0,Q1
DATA IN (REMOCON)
VIDEO SWITCH
(C,Y)BA7626*2
SEPARATE
Y/C MIX
VIDEO SWITCH
74HC4053
SW F
74LVX157MCT SELECTOR
X-TAL
FLAG1(16)
FLAG0(15)
SPICS(122)
SPICLK(125)
A/D POWER
ENCODER
RMC_IN/OUT
MICOM, FLT DRV
MULTI_L
BD3811K1
PART DATA
DTS-ES/DD-EX/PL IIX
FLT DRIVER
FL DISPLAY
AC CORD
PRE OUT
SPK B
SPK A
H/P OUT
MULTI OUT
OPTICAL 3
AUX
MOSI(127)
FLAG3(98)
74HC4053
MONITOR OUT
MONITOR OUT
MONITOR OUT
74HC4053
INPUT SELECTOR & VOLUME
ADSP-21266
DIGITAL AUDIO DECODER
BD3812F
SPEAKER OUT
AC OUTLET
2CH-VOLUME IC
AVC1590 / AVR1905 BLOCK DIAGRAM

10
AVR-1905/785 AVC-1590
LEVEL DIAGRAMS (1/2)
+
DIR
DSP
D/A
D/A
D/A
6dB
MUTE
--
+
+
D/A
HPF
D/A
MUTE
MUTE
+
0dB6CH IN
10dB
20dB
30dB
40dB
6CH IN
0dB
10dB
20dB
30dB
40dB
6CH IN
CD IN
-12dB
---
-30dBFS
-10dBFS
0dBFS
A/D
A/D
-30dBFS
-20dBFS
-10dBFS
0dBFS
-30dBFS
-20dBFS
-10dBFS
0dBFS
6dB
+
+--
BD3811K1
MUTE
25.5dB
25.5dB
-35.5dB
ATT
6CH IN
DIGITAL
6CH IN
CD IN
A/D IN
REV AMP
A/D IN
REV AMP
-20dBFS
-23dBFS
+
+
D/A OUT
LPF REV AMP
CENTER
SUM S/W
SW SUM
REV AMP
-18dB
BD3812F
ELECTRIC
VOLUME
VOL 00
VOL 00
TONE
MUTE
MUTE
PRE AMP POWER AMP
-20dB
-10dB
-20dB
-10dB
D/A OUT
100mV REF
DSP OUT
SL/SR/SBL/SBR
-18dB
BD3811K1
16dB
16dB
H/P OUT
(200mV)
(200mV)
FRONT
INPUT
BUFFER
AMP
A/D IN
REV AMP
DSP OUT
D/A OUT
100mV REF
-15dB
SPK OUT
SURROUND
BACK
SPK OUT
CENTER
SURROUND
SPK OUT
FRONT
2.83V
(1W/8ohm)
CENTER
SURROUND
SURROUND-BACK
SPK OUT
2.83V
(1W/8ohm)
H/P OUT
47mV
(0.27mW)
SPK OUT
FRONT

11
AVR-1905/785 AVC-1590
LEVEL DIAGRAMS (2/2)
OdB
LFE
LFE
D/A
D/A
MUTE
-- +
MUTE
-30dB
-20dB
-8dB
30dB
-20dBFS
-10dBFS
6dB
10.5dB
28dB
6CH IN
-10dB
10dB
20dB
DSP OUT
-30dBFS
0dBFS
6dB
Front D/A Out
100mV ref
+
D/A OUT
LPF
--
REV AMP SW SUM
REV AMP
VOL 00
SUB WOOFER
PRE OUT
500mV
SUB WOOFER
PRE OUT
(200mV)
Config2 -28dBFS
BD3811K1
(112mV)
6CH INPUT
SUB_WOOFER
Config1 -38dBFS
-18dB
10dB
TO FRONT CH
ELECTRIC
VOLUME PRE AMP

12
AVR-1905/785 AVC-1590
SEMICONDUCTORS
Only major semiconductors are shown, general semiconductors etc. are omitted to list.
主な半導体を記載しています。汎用の半導体は記載を省略しています。
1. IC’s
CXP740010-192Q (IC201)
CXP740010-192Q Terminal Function
Pin
No. Pin Name I/O Function
1 BD3811K1/3812F_MUTE O BD3811K/BD3812F MUTE CONTROL
2 BD3811K1/3812F_CLK O BD3811K/BD3812F CLOCK
3 BD3811K1/3812F_DATA O BD3811K/BD3812F DATA
4 MULTI MUTE O MULTI MUTE
5 VCR O VCR MUTE
6 ERR_MUTE O ERR MUTE
7 SEL_CLK O SEL_CLK
8 BSE O AC3MUTE MUTE for BITSTREAM
9 89057_EMPHA I LC89057 CONTROL
10 SW_SUM O SW SUMMING CONTROL
11 SHARC_SDIN I SHARC EX(DSP) DATA INPUT
12 89057_SDIN I LC89057 CONTROL
13 EPROM_RESET O EPROM RESET
14 89057_RESET O LC89057 RESET
15 SHARC_CS O SHARC EX(DSP) CS
16 SHARC_SDOUT O SHARC EX(DSP) DATA OUTPUT
17 89057_CE O LC89057 CONTROL
18 89057/1837_SDOUT O CONTROL DATA
19 89057/1837_SCLK O CONTROL CLOCK
20 1837_RESET O CODEC RESET
21 REELAY_SURR_B O SURROUND BACK RELAY
22 SW_MUTE O SW MUTE
PH7 PH6 PH5 PH4 PH3 PH2 PH1 PH0
PK7/TO1
RST
V
SS
XTAL
EXTAL
PK6/CS0
PK5/SI0
PK4/SO0
PK3/SCK0
PF7/AN11 PF6/AN10
PF5/AN9
PC6 PC7 PA0 PA1 PA2 PA3 PA4 PA5 PA6 PA7 NC V
DD
V
SS
PK1/TX PK2/TEX PI1/RMC PI2/NMI PI3/TO0/ADJ PI4/INT1/CS1 PI5/SCK1
PC5
PC4
PC3
PC2
PC1
PC0
PB7/SI2
PB6/SO2
PB5/SCK2
PB4/TO2
PB3
PB2
PB1
PB0
PJ7
PJ6
PJ5
PJ4
PJ3
PJ2
PJ1
PJ0
PD7
PD6
PD5
PD4
PD3
PD2
PD1
PD0
PI6/SO1
PI7/SI1
PE0/INT0
PE1/INT2
PE2/PWM0
PE3/PWM1
PE4
PE5
PE6
PE7
PG0/TxD
PG1/RxD
PG2/EC0
PG3/EC1
PG4/EC2
PG5/INT3
PG6/INT4
PG7/CINT
AN0
AN1
AN2
AN3
PF0/AN4
PF1/AN5
PF2/AN6
PF3/AN7
AV
DD
AV REF
AV SS
PF4/AN8
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
100
99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81
21
22
23
24
25
26
27
28
29
30
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
TOP VIEW

13
AVR-1905/785 AVC-1590
23 RELAY_FRONT_B O FRONT B RELAY
24 RELAY_FRONT_A O FRONT A RELAY
25 RELAY_SURR O SURROUND RELAY
26 RELAY_CNT O CENTER RELAY
27 RELAY_H/P O RELAY H/P
28 FUNC_UP O ENCODER INPUT (FUNCTION)
29 H/P_DETECT I DETECT H/P
30 FUNC_DOWN O ENCODER INPUT (FUNCTION)
31 SURR_SB_MUTE O SURROUND BACK MUTE
32 CNT_MUTE O CENTER MUTE
33 RLY MULTI O -
34 SURR_MUTE O SURROUND MUTE
35 TC9273 STB O TC9273 STB
36 TC9273 CLK O TC9273 CLK
37 TC9273 DATA O TC9273 DATA
38 FL_DRV_RST O LC75721 RESET
39 RELAY_POWER O POWER RELAY
40 RESET I RESET
41 GND GND
42 XTAL CRISTAL OSIRATER CONNECTION
43 EXTAL CRISTAL OSIRATER CONNECTION
44 FL_DRV_CE O LC75721 CE
45 FL_DRV_DATA O LC75721 DATA
46 FL_DRV/2090_CLK O LC75721/BU2090 CLOCK
47 2090_DATA O BU2090 DATA
48 VOL_DOWN I ENCODER INPUT (VOLUME)
49 VOL_UP I ENCODER INPUT (VOLUME)
50 SEL_DOWN I ENCODER INPUT (SELECTOR)
51 SEL_UP I ENCODER INPUT (SELECTOR)
52 AVSS AVSS
53 VREF VREF
54 AVDD AVDD
55 S-VIDEO_DET I S Signal Detect input
56 COPM_DET I Compornent Signal input
57 STEP_OPT I AREA SELECT
58 SET_OPT I MODEL SELECT
59 GND GND
60 KEY_IN3 I KEY INPUT
61 KEY_IN2 I KEY INPUT
62 KEY_IN1 I KEY INPUT
63 C-VIDEO_DET I Composit Signal Detect input
64 PROTECT I PROTECTION
65 89057_INT LC89057 INT
66 SHARC_SCLK O SHARC EX(DSP) SCLK
67 1837_CE O CODEC CE
68 SHARC_RESET O SHARC EX(DSP) RESET
69 FRONT_MUTE O FRONT MUTE
70 PWR_DOWN I POWER DOWN DETECT
71 NC - -
72 NC - -
73 LC74781 SOUT O LC74781 SOUT
74 NC - -
75 TA1270_TC90A69 DATA O TA1270/TC90A69 DATA
76 TA1270_TC90A69 CLK O TA1270/TC90A69 SCLK
77 RDS_DATA I RDS(TDA7330) DATA
Pin
No. Pin Name I/O Function

14
AVR-1905/785 AVC-1590
78 RDS_CLK I RDS(TDA7330) CLOCK
79 FLAG3 I Special flag for ROM update
80 FLAG2 I DSP operation check flag
81 FLAG1 I NON USE
82 FLAG0 I EPROM chip select control for DSP
83 LC74781 SCLK O LC74781 SCLK
84 LC74781 CS O LC74781 CS
85 REMOCON REMOTE CONTROL SIGNAL INPUT
86 S-MONI DET I VIDEO S-SIGNAL MONITOR DETECT
87 GND GND
88 VSS VSS
89 VDD(BACK UP) VDD FOR BACK UP
90 NC - -
91 2090 DATA2 O BU2090 DATA2(VIDEO)
92 PLL_DATA O PLL CONTROL (LC72131)
93 PLL_CLK O PLL CONTROL (LC72131)
94 PLL_DT_IN I PLL CONTROL (LC72131)
95 TU_MUTE O TUNER MUTE
96 ST I STEREO DETECT
97 TUNED I TUNE DETECT
98 PLL_CE O PLL CONTROL (LC72131)
99 2090_CLK(VIDEO) O BU2090 CLK (VIDEO)
100 2090_DATA(VIDEO) O BU2090 DATA (VIDEO)
Pin
No. Pin Name I/O Function

15
AVR-1905/785 AVC-1590
ADSP-21266SKSTZ-1B (IC804)
ADSP-21266SKSTZ-1B Terminal Function
1
36
37
73
72
108
144 109
TOP VIEW
PIN 1 INDICATOR
Pin Name
LQFP
Pin # Pin Name
LQFP
Pin # Pin Name
LQFP
Pin # Pin Name
LQFP
Pin #
V
DDINT
1V
DDINT
37 V
DDEXT
73 GND 109
CLKCFG0 2 GND 38 GND 74 V
DDINT
110
CLKCFG1 3 RD 39 V
DDINT
75 GND 111
BOOTCFG0 4 ALE 40 GND 76 V
DDINT
112
BOOTCFG1 5 AD15 41 DAI_P10 (SD2B) 77 GND 113
GND 6 AD14 42 DAI_P11 (SD3A) 78 V
DDINT
114
V
DDEXT
7 AD13 43 DAI_P12 (SD3B) 79 GND 115
GND 8 GND 44 DAI_P13 (SCLK23) 80 V
DDEXT
116
V
DDINT
9V
DDEXT
45 DAI_P14 (SFS23) 81 GND 117
GND 10 AD12 46 DAI_P15 (SD4A) 82 V
DDINT
118
V
DDINT
11 V
DDINT
47 V
DDINT
83 GND 119
GND 12 GND 48 GND 84 V
DDINT
120
V
DDINT
13 AD11 49 GND 85 RESET 121
GND 14 AD10 50 DAI_P16 (SD4B) 86 SPIDS 122
FLAG0 15 AD9 51 DAI_P17 (SD5A) 87 GND 123
FLAG1 16 AD8 52 DAI_P18 (SD5B) 88 V
DDINT
124
AD7 17 DAI_P1 (SD0A) 53 DAI_P19 (SCLK45) 89 SPICLK 125
GND 18 V
DDINT
54 V
DDINT
90 MISO 126
V
DDINT
19 GND 55 GND 91 MOSI 127
GND 20 DAI_P2 (SD0B) 56 GND 92 GND 128
V
DDEXT
21 DAI_P3 (SCLK0) 57 V
DDEXT
93 V
DDINT
129
GND 22 GND 58 DAI_P20 (SFS45) 94 V
DDEXT
130
V
DDINT
23 V
DDEXT
59 GND 95 A
VDD
131
AD6 24 V
DDINT
60 V
DDINT
96 A
VSS
132
AD5 25 GND 61 FLAG2 97 GND 133
AD4 26 DAI_P4 (SFS0) 62 FLAG3 98 CLKOUT 134
V
DDINT
27 DAI_P5 (SD1A) 63 V
DDINT
99 EMU 135
GND 28 DAI_P6 (SD1B) 64 GND 100 TDO 136
AD3 29 DAI_P7 (SCLK1) 65 V
DDINT
101 TDI 137
AD2 30 V
DDINT
66 GND 102 TRST 138
V
DDEXT
31 GND 67 V
DDINT
103 TCK 139
GND 32 V
DDINT
68 GND 104 TMS 140
AD1 33 GND 69 V
DDINT
105 GND 141
AD0 34 DAI_P8 (SFS1) 70 GND 106 CLKIN 142
WR 35 DAI_P9 (SD2A) 71 V
DDINT
107 XTAL 143
V
DDINT
36 V
DDINT
72 V
DDINT
108 V
DDEXT
144

16
AVR-1905/785 AVC-1590
LC89057W (IC807)
LC89057W Terminal Function
Function
Pin
No. Pin Name
1 RXOUT O Input bi-phase select data output terminal
2 RX0 I TTL compatible digital data input terminal
3 RX1 I Coaxial compatible amp built-in digital data input terminal
4 RX2 I TTL compatible digital data input terminal
5 RX3 I TTL compatible digital data input terminal
6 DGND — Digital GND
7 DVDD — Digital power
8 RX4 I TTL compatible digital data input terminal
9 RX5/VI I TTL compatible digital data/Validity flag input terminal for modulation
10 RX6/UI I TTL compatible digital data/User data input terminal for modulation
11 DVDD — Digital power for PLL
12 DGND — Digital GND for PLL
13 LPF O PLL loop filter connecting terminal
14 AVDD — Analog power for PLL
15 AGND — Analog GND for PLL
16 RMCK O RMCK clock output terminal (256fs, 512fs, XIN, VCO)
17 RBCK O/I RBCK clock in/output terminal (64fs)
18 DGND — Digital GND
19 DVDD — Digital power
20 RLRCK O/I RLRCK clock in/output terminal (fs)
21 RDATA O Serial audio data output terminal
22 SBCK O SBCK clock output terminal (32fs, 64fs, 128fs)
23 SLRCK O SLRCK clock output terminal (fs/2, fs, 2fs)
24 SDIN I Serial audio data input terminal
25 DGND — Digital GND
26 DVDD — Digital power
27 XMCK O Osc. amp output terminal
I/O
36 RERR1RXOUT 35 INT2RX0 34 CKST3RX1 33 AUDIO/VO4RX2 32 EMPHA/UO5RX3 31 DGND6DGND 30 DVDD7DVDD 29 XIN8RX4 28 XOUT9RX5/VI 27 XMCK10RX6/UI 26 DVDD11DVDD 25 DGND12DGND
24 SDIN37DO
23 SLRCK38DI
22 SBCK39CE
21 RDATA40CL
20 RLRCK41XMODE
19 DVDD42DGND
18 DGND43DVDD
17 RBCK44TMCK/PIO0
16 RMCK45TBCK/PIO1
15 AGND46TLRCK/PIO2
14 AVDD47TDATA/PIO3
13 LPF48TXO/PIOEN
TOP VIEW
1 RXOUT
32
EMPHA/UO
33
AUDIO/VO
35
INT
40
CL
39
CE
38
DI
28
XOUT
29
XIN
27
XMCK
34
CKST
41
XMODE
Input
Selector
2
RX0
3
RX1
4
RX2
5
RX3
8
RX4
9
RX5/VI
10
RX6/UI
37
DO
36
RERR
21
RDATA
24
SDIN
16
RMCK
17 RBCK
20
RLRCK
22
SBCK
23
SLRCK
13
LPF
44
TMCK/PIO0
45
TBCK/PIO1
46
TLRCK/PIO2
47
TDATA/PIO3
48
TXO/PIOEN
Clock
Selector
C bit, U bit
PLL
Demodulation
&
Lock Detect
Microcontroller
I/F
Data
Selector
I/N
Modulation
or
Parallel Port

17
AVR-1905/785 AVC-1590
BD3811K1 (IC701)
Function
Pin
No. Pin Name I/O
* For latch-up countermeasure, perform each power supply ON/OFF in the same timing.
28 XOUT O X’tal osc. connecting output terminal
29 XIN I X’tal osc. connection, external clock input terminal (24.576MHz or 12.288MHz)
30 DVDD — Digital power
31 DGND — Digital GND
32 EMPHA/UO I/O Emphasis information/U-data output/Chip address setting terminal
33 AUDIO/VO I/O Non-PCM detect/V-flag output/ Chip address setting terminal
34 CKST I/O Clock switch transition period output/Demodulation master or slave function switching terminal
35 INT I/O Interrupt output for µcom (Interrupt factor selectable)/Modulation or general I/O switching terminal
36 RERR O PLL lock error, data error flag output
37 DO O µcom I/F, read out data output terminal (3-state)
38 DI I µcom I/F, write data input terminal
39 CE I µcom I/F, chip enable input terminal
40 CL I µcom I/F, clock input terminal
41 XMODE I System reset input terminal
42 DGND — Digital GND
43 DVDD — Digital power
44 TMCK/PIO0 I/O 256fs system clock input for modulation/General I/O in/output terminal
45 TBCK/PIO1 I/O 64fs bit clock input for modulation/General I/O in/output terminal
46 TLRCK/PIO2 I/O fs clock input for modulation/General I/O in/output terminal
47 TDATA/PIO3 I/O Serial audio data input for modulation/General I/O in/output terminal
48 TXO/PIOEN O/I Modulation data output/ General I/O enable input terminal
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
25 26
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65
27 28 29 30 31 32 33 34 35 36 37 38 39 40
5.1ch Mode SW2 DVD
5.1ch Mode SW1
5.1ch Mode SW2 DSP
BASS
BOOST
LOGIC
TNF2
TNF1
BNF11
BNF21
BNF12
BNF22
BBNF2
OUT2
BBNF1
OUT1
AGND8
AGND7
VCC
AGND6
VEE
AGND5
MUTE
CL
DA
DGND
AGND4
GOUTSR
VINSR
AGND3
IN22 IN21 IN12 IN11 ROUT32 ROUT31 ROUT22 ROUT21 ROUT12 ROUT11 AGND10 GOUT2 VIN2 AGND9 GOUT1 VIN1
IN31
IN32
IN41
IN42
IN51
IN52
IN61
IN62
IN71
IN72
IN81
IN82
INDVDSR
INDVDSL
INDVDC
INDVDSW
OUT2(+)
OUT2(-)
OUT1(+)
OUT1(-)
IN1DSP
IN1MIX
IN2DSP
IN2MIX
INDSPSR
INDSPSL
INDSPC
INDSPSW
AGND1
GOUTSW
VINSW
AGND2
GOUTC
VINC
OUTSW
OUTC
OUTSL
OUTSR
VINSL
GOUTSL
TREBLE
BASS

18
AVR-1905/785 AVC-1590
AD1837 (IC808)
AD1837 Terminal Function
DescriptionPin No. Pin Name Input/
Output
1,39 DVDD Digital Power Supply. Connect to digital 5V supply.
2 CLATCH I Latch Input for Control Data
33 CIN I Serial Control Input
4 PD/RST I Power-Down/Reset
5,10,16,24,30,35 AGND Analog Ground
6,12,25,31 NC Not connected
7,13,26,32 OUTLx O DACx Left Channel Output
8,14,27,33 NC Not connected
9,15,28,34 OUTRx O DACx Right Channel Output
11,19,29 AVDD Analog Power Supply. Connect to analog 5V supply.
17 FILTD Filter Capacitor Connection. Recommend 10µF/100nF.
18 FILTR Reference Filter Capacitor Connection. Recommended 10µF/100nF.
20 ADCLN I ADC Left Channel Negative Input
21 ADCLP I ADC Left Channel Positive Input
22 ADCRN I ADC Right Channel Negative Input
23 ADCRP I ADC Right Channel Positive Input
36 M/S I ADC Master/Slave Select
37 DLRCLK I/O DAC LR Clock
38 DBCLK I/O DAC Bit Clock
40,52 DGND Digital Ground
41-44 DSDATAx I DACx Input Data (Left and Right Supply)
45 ABCLK I/O ADC Bit Clock
46 ALRCLK I/O ADC LR Clock
47 MCLK I Master Clock Input
48 ADVDD Digital Output Driver Power Supply
49 ASDATA O ADC Serial Data Output
50 COUT O Output for Control Data
51 CCLK I Control Clock Input for Control Data
1
2
3
4
5
6
7
8
9
10
11
12
13
AGND
AVDD
OUTR2
NC
OUTL2
NC
OUTR1
NC
OUTL1
NC
PD/RST
CIN
CLATCH
DVDD
NC
OUTL3
NC
OUTR3
NC
OUTL4
NC
OUTR4
AGND
DLRCLK
DBCLK
DGND
14 15 16 17 18 19 20 21 22 23 24 25 26
27
28
29
30
31
32
33
34
35
36
37
38
39
52 51 50 49 48 47 46 45 44 43 42 41 40
FILTD FILTR
AGND
M/S
AGND
AVDD
ADCLN
ADCLP
ADCRN
ADCRP
AGND
AGND
DGND CCLK COUT ASDATA ODVDD MCLK ALRCLK ABCLK DSDATA4 DSDATA3 DSDATA2 DSDATA1
DVDD
AVDD
TOP VIEW
OUTL1
CONTROL PORT CLOCK
FILTD
FILTR
ADCLP
ADCLN
ADCRP
ADCRN
DLRCLK
DBCLK
DSDATA1
DSDATA2
DSDATA3
DSDATA4
MCLKASDATAABCLKALRCLKODVDDDVDD DVDD
DGND AGND AGND AGND AGNDDGND
CINCLATCHCCLK COUT
DIGITAL
FILTER
PD/RST M/S AVDD AVDD
VOLUME
OUTR1
OUTL2
OUTR2
OUTL3
OUTR3
OUTL4
OUTR4
AD1837
DIGITAL
FILTER
SERIAL DATA
I/O PORT VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
DIGITAL
FILTER
DIGITAL
FILTER
DIGITAL
FILTER
DIGITAL
FILTER
VREF
Σ-∆
ADC
Σ-∆
ADC
Σ-∆
DAC
Σ-∆
DAC
Σ-∆
DAC
Σ-∆
DAC

19
AVR-1905/785 AVC-1590
LC75721E (IC301)
TA1270BF (IC606)
64
49
48 33
32
17
161
AM 1 AM 2 AM 3 AM 4 AM 5 AM 6 AM 7 AM 8 AM 9 AM 10 AM 11 AM 12 AM 13 AM 14 AM 15 AM 16
AM 17
AM 18
AM 19
AM 20
AM 21
AM 22
AM 23
AM 24
AM 25
AM 26
AM 27
AM 28
AM 29
AM 30
AM 31
AM 32
G7 G8 G9 G10 G11 AA8/G12 AA7/G13 AA6/G14 AA5/G15 AA4/G16 AA3 AA2 AA1 AM35 AM34 AM33
DI
CL
CE
RES
V
DD
OSCI
OSCO
Vss
TEST
V
FL
G1
G2
G3
G4
G5
G6
Symbol
V
DD
Vss
Power terminal +5V
Power terminal GND
V
FL
Power terminal FL drive
DI
CL
CE
Serial data transfer terminal
DI: Data
CL: Clock
CE: Chip enable
OSCI
OSCO External CR connecting terminal
RES System reset terminal
AM1~AM35
AA1~AA3 Anode output terminal
AA4/G16
AA5/G15
AA6/G14
AA7/G13
AA8/G12
Anode/Grid output terminal
G1~G11 Grid output terminal
TEST LSI test terminal
Function
LC75721E Terminal Function
NJM2274R (IC614)
TC90A69F (IC609)
1
2
3
45
7
8
6
TOP
VIEW
1Yin
Cin
7
C Mute CTL
2
GND
Disc.
Vref
7
Power Save CTL
2
Vcc
Clamp
8 Bias
++
Vsag4
3 Vout
750
ohm
39
40
41
42
43
44
45
46
47
48
1
DAC1
Y INPUT
DAC Vcc (5V)
C Vcc (5V)
UV/CbCr SW
fsc OUTPUT
1HDL CONT
SECAM CONT
B-Y/Cb OUTPUT
R-Y/Cr OUTPUT
4.43MHz
X’tal
2
M-X’tal
3
3.58MHz
X’tal
4
APC
5
C GND
6
CHROMA
OUTPUT
7
V-SEP
8
SYNC.
INPUT
9
SYNC.
OUTPUT
10
AFC
FILTER
11
SYNC.
GND
12
32fh VCO
13
VD
OUTPUT
14
HD
OUTPUT
38
DAC2
37
Y OUTPUT
36
GND
35
DAC TEST
34
SDA
33
SCL
32
Ys (TH=0.7V HI; 1IN/LOW; 2IN)
31
R-Y1 INPUT
30
B-Y1 INPUT
29
Y1 INPUT
28
I
2
C
GND
27
R-Y2 INPUT
26
B-Y2 INPUT
25
Y2 INPUT
24
23
22
21
20
19
18
17
16
15
SW GND
ADRS SW
R-Y/R
OUTPUT
B-Y/B
OUTPUT
Y/G
OUTPUT
SW
Vcc (9V)
SYNC
Vcc (9V)
CP/HP
INPUT
Dig GND
SCP
OUTPUT
DAC2
DAC1
fsc
Y DL
Y DL
SW
SW
PEDESTAL
CLAMP
1H DL
CONTROL
SECAM
CONTROL
CbCr / UV
SW
fsc
TRAP
OFFSET
SW
LPF / fsc
TRAP
BPF H. AFC H C / D
32fH
VCO
V C / D
ACC
TOF SCP
SW
APC
P / N ID
SYSTEM CW
MATRIX TINT
DEMO
CHROMA
BLK
NOSE
DET
YUV RGB
MATRIX
CP / HP
IN
SW
V SEP
SYNC
SEP
SUB-COLOR
VCXO
SUB-
CONTRAST
Y OFFSET
SW
DAC
TEST Ys
I
2
C BUS
CONTROL
PEDESTAL
CLAMP
PEDESTAL
CLAMP
HI: 20h/LOW: 24h
1
BIAS VB1
2
VRT
27
COUT
3
VDD1
26
VSS1
4
TESTI1
25
YOUT
5
VSS2
24
VB2
6
VRB
23
PD
7
YCIN
22
FIL
8
TEST
21
VSS4
9
KILLER
20
VDD4
10
TESTI2
19
FSC
11
VDD3
18
TESTOUT
12
VSS3
17
MODE1
13
VDD2
16
SDA
14
TESTI3
15
SCL
CORING
PEAKING
DAC
1/8
(8fsc) 8fsc 4fsc
DAC IIC BUS
28
PLL DET 1/2VCO
Ped.
CLIP
LPF
DELAY
CNR
C-N.C
CORING V-ENHANCER
KILLER
DYNAMIC COMB FILTER
Sync. Clamp
ADC
LINE
MEMORY
LINE
MEMORY
INTERPOLATION
MM74LCX244
(IC809-811)
BU2090F (IC302,607,615)
74LVX157
(IC816)
1
2
3
4
5
6
7
8
18
17
16
15
14
13
12
11Q3
VDD
OE
Q7
Q8
Q11
Q10
Q9
Q6
VSS
DATA
CLOCK
LCK
Q0
Q1
Q2
910
Q4 Q5
CONTROL CIRCUIT
12-bit SHIFT REGISTER
12 -bi t S TRAGE RE GI STER
OUTPUT BUFF ER( OPEN DRAI N)
1
2
3
4
5
6
7
8
20
19
18
16
15
14
13
I3
VCC
OE2
O2
I5
O0
I4
O1
I6
OE
I0
O4
I1
O5
I2
O6
912
O7 O3
10 11
GND I7
TOP VIEW
17
1A
1B
1Y
2A
2B
2Y
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Vcc
ST
4A
4B
4Y
3A
3B
3Y
SELECT
5
SEL

20
AVR-1905/785 AVC-1590
BA7625 (IC651)
BA7626 (IC612,613,616,652,653)
IC63LV1024-10T (IC827)
BD3812F (IC702) MM74HCT244 (IC812) RC1117-1.2 (IC824)
RC1117-3.3 (IC823)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Monitor OUT
GND
IN5
GND
IN4
CTL E
IN3
CTL D
IN1
CTL A
V OUT1
Vcc
IN2
CTL B
V OUT2
CTL C
6dB
6dB
LOGIC
LOGIC
ABE
MONITOR OUT C D E V OUT 1 C D E V OUT 2
LL* IN1 LL* LL* IN1
H L * IN 2 H L * IN 2 H L * 
L H * IN 3 L H * IN 3 L H * IN 3
H H L IN 4 H H L IN 4 H H L IN 4
HHH IN5 HHH IN5 HHH IN5
Note 1: * mark means that feasible for either H or L.
Note 2: Each input terminal is provided with sink chip clamp (BA7625).
Each input terminal takes 20kohm at the end (BA7626).
㧗
㧙
14 OUT1
13 OUT2
12 SEL
DGND
MUTE
11
10
DA
V
CC
V EE
AGND
AGND
AGND
IN 1
9
CL
8
7
6
5
4
2
LOGIC
㧗
㧙
IN 2 3
1
201
192
183
174
165
156
147
138
129
1110
1G
2G
1A
0
2A
0
2A
3
2Y
0
1Y
0
1Y
3
1A
1
2Y
1
1A
2
2Y
2
1Y
1
2A
1
1Y
2
2A
2
1A
3
2Y
3
GND
V
CC
1
2
3
2
ADJ/GND
OUT
IN
VOUT
FRONT VIEW