Denon AVC-1320, AVR-786 Schematic

For U.S.A., Canada, Europe,
Asia, Taiwan R.O.C., Korea
& Japan model

SERVICE MANUAL

Ver. 1

MODEL

AVR-1906/786

AV SURROUND RECEIVER

AVC-1620

AV SURROUND AMPLIFIER

注 意

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。

●

For purposes of improvement, specifications and
design are subject to change without notice.

●

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.

Denon Brand Company, D&M Holdings Inc.

●

●

●

●

TOKYO ,JAPAN

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。

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。

X0239 V.01 DE/CDM 0506

AVR-1906 / AVR-786 / AVC-1620

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.

500V

1M

(1)

(2)

(1)

(2)

2

DIMENSION

AVR-1906 / AVR-786 / AVC-1620

3

AVR-1906 / AVR-786 / AVC-1620

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.

・ All user settings will be lost and 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。

4

AVR-1906 / AVR-786 / AVC-1620

ADJUSTMENT

Audio Section

Idling Current

Required measurement equipment: DC Voltmeter

1. 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) 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, VR107SBL,VR107SBR
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, SUR­ROUND-Lch: TP101, SURROUND-Rch: TP102, SUR­ROUND-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 : 7CH 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.

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

VR107SBL,VR107SBR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

()に回し、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:7CH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。



DC Voltmeter

F Lch

S Lch

S Back Rch

S Back Lch

C ch

S Rch

F Rch

VR104
TP104
VR101,TP101

TP107
VR107SBR

TP106
VR107SBL

VR103,TP103

VR102
TP102

VR105
TP105

5

AVR-1906 / AVR-786 / AVC-1620

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, 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) 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 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

2. Adjustment

(1) Remove top cover and set VR901, VR902, VR903, on C-

S VIDEO2 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 VR902 clockwise ( ) to adjust the COMPONENT

Video Y voltage (except H. Sync) to 714 ± 50 mVp-p. (Re­fer to Fig. 1)

(7) Adjust the Variable Resistors of Cr: VR901 and Cb:

VR903 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

AVC-1620(日本向けモデル）は調整は有りません。

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VR901,

VR902,VR903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)VR902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:VR901、Cb:VR903の可変抵抗器を調整

します。(fig.2、3参照)

Cb,Cr:486±50mVp-p(U.S.A.,Canadaモデル）

   525±50mVp-p(その他の仕向け地）

6

Oscilloscope

VR903

Cb

Cr

AVR-1906 / AVR-786 / AVC-1620

MONITOR OUT

(Y,Cb,Cr)

Y

VR902VR901

Video Section

7

AVR-1906 / AVR-786 / AVC-1620

Volt s

IRE:FLT

100.0

0.5

50.0

0.0

0.5

-20.0 -10.0 0.0

Volts

0.5

IRE:FLT

50.0

Y-Signal

714±50mV

p-p

10.0

20.0 30.0

Fig.1 Component Video Y signal

40.0 50.0 60.0

486±50mV (U.S.A. & Canada model)

p-p

525±50mV (Other model)

p-p

0.0

-0.5

Volts

0.5

0.0

0.0

-50.0

0.0

IRE:FLT

50.0

0.0

-50.0

20.0

Fig.2 Cb signal

40.0

60.0

486±50mV (U.S.A. & Canada model)
525±50mV (Other model)

80.0

p-p

p-p

-0.5

0.0

20.0

Fig.3 Cr signal

8

40.0

60.0

80.0

BLOCK DIAGRAM

AVR-1906 / AVR-786 / AVC-1620

9

LEVEL DIAGRAMS (1/2)

AVR-1906 / AVR-786 / AVC-1620

10

LEVEL DIAGRAMS (2/2)

AVR-1906 / AVR-786 / AVC-1620

11

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

M30622MEP (IC201)

DDVSS

PK1/TX

PK2/TEX

PI1/RMC

PI2/NMI

PI3/TO0/ADJ

PI4/INT1/CS1

PI5/SCK1

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

50

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

PC6

PC7

PA0

PA1

PA2

PA3

PA4

PA5

PA6

PA7NCV

99989796959493929190898887868584838281

100

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

31323334353637383940414243444546474849

TOP VIEW

AVR-1906 / AVR-786 / AVC-1620

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

SS

PH7

PH6

PH5

PH4

PH3

PH2

PH1

PH0

PK7/TO1

RST

V

XTAL

EXTAL

PK5/SI0

F7/AN11

F6/AN10

PF5/AN9

K3/SCK0

PK6/CS0

PK4/SO0

M30622MEP Terminal Function

PIN No. PIN NAME I/O FUNCTION

1 SW_SUM O SW SUMMING CONTROL
2 4094CLK O BU4094(IC551Å`3) CLOCK
3 BU2090_CLK(VIDEO) O BU2090(IC604,608) CLOCK
4 BU2090/LC74781_DATA1 O BU2090(IC608) DATA/LC74781(IC603) SDATA IN
5 BU2090/LC74781_DATA2(CLK) O BU2090(IC604) DATA/LC74781(IC603) SCLK
6 REMOCON I REMOCON SIGNAL DATA INPUT
7 AD1837_SDIN(OVERLOAD) I AD1837(IC808) COUT SERIAL DATA INPUT
8BYTE GNDGND
9 CNVSS - UP GRADE PIN (TP201 CNVSS)

10 BU2090/4094_DATA O BU4094(IC551Å`3) DATA /BU2090ÅiIC303) DATA

11 LC75721_RESET O LC75721(IC301) RESET CONTROL
12 RESET I u-COM RESET SIGNAL INPUT
13 X-OUT O OSILATOR CONNECTION
14 Vss GND GND
15 X-IN I OSILATOR CONNECTION
16 Vcc1(+5V) 5V POWER 5V
17 NC I PULL DOWN
18 FLAG0 I EPROM chip select control for DSP
19 LC89057_INT I LC89057(IC807) INT SIGNAL INPUT
20 PROTECTION I PROTECTION SIGNAL INPUT
21 LC75721/BU2090_CLK O BU2090(IC303) CLOCK/ LC75721(IC301) CLOCK
22 LC75721_DATA O LC75721(IC301) DATA
23 LC75721_CE O LC75721(IC301) CHIP ENABLE

12

AVR-1906 / AVR-786 / AVC-1620

PIN No. PIN NAME I/O FUNCTION

24 TC9273_STB O TC9273-004(IC703) STB
25 TC9273_DATA O TC9273-004(IC703) DATA
26 TC9273_CLK O TC9273-004(IC703) CLOCK
27 NC I/O OPEN
28 MIC_RELAY O MIC RELAY (RLY701) CONTROL
29 TC90A69/TA1270_CLK O TC90A69(IC612) SCLOCK/TA1270BF(IC901) SCLOCK
30 TC90A69/TA1270_DATA I/O TC90A69(IC612) SDATA/TA1270BF(IC901) SDATA
31 RS232C_TX O RS232C SIGNAL OUTPUT
32 RS232C_RX I RS232C SIGNAL INPUT
33 NC O GND
34 NC O GND
35 PLL_DATA_IN I TUNER DATA IN
36 PLL_DATA_OUT O TUNER DATA OUT
37 PLL_CLK O TUNER PLL CLOCK
38 PLL_CE O TUNER PLL CHIP ENABEL
39 TUNED I TUNED SIGNAL INPUT
40 STEREO I STEREO SIGNAL INPUT
41 RS232C_UPGRADE(EPM) I UP GRADE PIN (TP201 EPM)
42 VOL_ENCORDER_UP I MASTER VOLUME ENCODER(VEC301)
43 VOL_ENCORDER_DOWN I MASTER VOLUME ENCODER(VEC301)
44 SELECT_UP I SELECT ENCONDER(VEC302)
45 SELECT_DOWN I SELECT ENCONDER(VEC302)
46 RS232C-UPGRADE(CE) I UP GRADE PIN (TP201 CEÅj
47 POWER_DOWN I POWER DOWN CONTROL INPUT
48 RDS_DATA I TDA7330BDÅiIC202Åj RDDR SIGNAL INPUT
49 ERR_MUTE O ERROR MUTE
50 BSE O DIGITAL SIGNAL MUTE
51 LC89057_EMPHA I LC89057(IC807) PRE EMPHASIS INFOMATION SIGNAL INPUT
52 SHARC_SDIN I SHARC(IC804) SERIAL DATA INPUT
53 LC89057_SDIN I LC89057(IC807) D0 SIGNAL INPUT
54 EPPROM_RESET O FLASH ROM(IC805) RESET
55 LC89057_RESET O LC89057(IC807) RESET
56 SHARC_CE O SHARC(IC804) CHIP ENABEL
57 SHARC_SDOUT O CHARC(IC804) SERIAL DATA OUT
58 LC89057_CE O LC89057(IC807) CHIP ENABLE
59 LC89057_AD1837_SDOUT O LC89057(IC807) D1 SIGNAL / AD1837(IC808) CIN SIGNAL
60 LC89057_AD1837_SCLK O LC89057(IC807) CLOCK/ AD1837(IC808) CCLOCK
61 AD1837_RESET O AD1837(IC808) RESET SIGNAL OUT (TO IC821)
62 Vcc2(+5V) 5V POWER 5V
63 SHARC_SCLK O SHARC(IC804) SPICLK
64 Vss GND GND
65 SHARC_RESET O SHARC(IC804) RESET SIGNAL
66 AD1837_CE O AD1837(IC808) CLATCH
67 FLAG3 I Special flag for ROM updata
68 FLAG2 I DSP operation check flag
69 FLAG1 I NON USE
70 H/P_DETECT I HEAD PHONE DETECT
71 FUNCTION_UP I FUNCTION ENCODER (VEC303)
72 FUNCTION_DOWN I FUNCTION ENCODER (VEC303)
73 RDS_CLK O TDA7332BD(IC202) CLOCK FOR RDS
74 POWER_KEY I POWER SWICH SIGNAL INPUT
75 MIC DETECT I MIC DETECTION
76 POWER_RELAY O FRONT PANEL POWER CONTROL
77 ST/BY_LED(RED) O STBY LED RED CONTROL
78 VCR_MUTE O VCR OUT(REC OUT) OUTPUT CONTROL
79 BD3811K1_CLK O BD3811K1(IC701) CLOCK/BD3812F (IC702) CLOCK

13

AVR-1906 / AVR-786 / AVC-1620

PIN No. PIN NAME I/O FUNCTION

80 BD3811K1_DATA O BD3811K1(IC701) DATA/BD3812F(IC702) DATA
81 MUTE_POWER O MUTE POWER CONTROL
82 BU4904_STB(RELAY) O BU4094(IC551) STB
83 BU4094_STB(RELAY&MUTE) O BU4094(IC553) STB
84 BU4094_STB(MUTE) O BU4094(IC552) STB
85 S-MON_DET I S-MONITOR DETECT
86 COMP_DET I COMPONENT SIGNAL INPUT DETECT
87 C_DET I CONPOSIT SIGNAL INPUT DETECT
88 S_DET I S VIDEO SIGNAL INPUT DETECT
89 NC O OPEN
90 KEY_IN1 I KEY1 SIGNAL INPUT
91 KEY_IN2 I KEY2 SIGNAL INPUT
92 KEY_IN3 I KEY3 SIGNAL INPUT
93 SET_OPTION I MODEL OPTION SELECT
94 BAND_OPTION I AREA OPTION SELECT
95 74HC151_A O TC74HC151A (IC827) CONTROL COAXIAL SIGNAL SELECT
96 AVss GND GND
97 SEL_CLK O SEL_CLK
98 VREF(+5V) 5V VREF
99 AVcc(+5V) 5V POWER 5V

100 LC74781_CE O LC74781(IC603) CS

14

ADSP-21266SKSTZ-1B (IC804)

AVR-1906 / AVR-786 / AVC-1620

144

1

36

37

PIN 1 INDICATOR

TOP VIEW

109

108

73

72

ADSP-21266SKSTZ-1B Terminal Function

LQFP

Pin Name

V

DDINT

Pin # Pin Name

1V

DDINT

CLKCFG0 2 GND 38 GND 74 V
CLKCFG1 3 RD 39 V
BOOTCFG0 4 ALE 40 GND 76 V

LQFP
Pin # Pin Name

37 V

DDEXT

DDINT

LQFP
Pin # Pin Name

73 GND 109

DDINT

75 GND 111

DDINT

BOOTCFG1 5 AD15 41 DAI_P10 (SD2B) 77 GND 113
GND 6 AD14 42 DAI_P11 (SD3A) 78 V
V

DDEXT

7 AD13 43 DAI_P12 (SD3B) 79 GND 115
GND 8 GND 44 DAI_P13 (SCLK23) 80 V
V

DDINT

9V

DDEXT

45 DAI_P14 (SFS23) 81 GND 117
GND 10 AD12 46 DAI_P15 (SD4A) 82 V
V

DDINT

11 V

DDINT

47 V

DDINT

83 GND 119
GND 12 GND 48 GND 84 V
V

DDINT

13 AD11 49 GND 85 RESET 121

DDINT

DDEXT

DDINT

DDINT

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

AD7 17 DAI_P1 (SD0A) 53 DAI_P19 (SCLK45) 89 SPICLK 125
GND 18 V
V

DDINT

19 GND 55 GND 91 MOSI 127

DDINT

54 V

DDINT

90 MISO 126

GND 20 DAI_P2 (SD0B) 56 GND 92 GND 128
V

DDEXT

GND 22 GND 58 DAI_P20 (SFS45) 94 V
V

DDINT

AD6 24 V

21 DAI_P3 (SCLK0) 57 V

23 V

DDEXT

DDINT

59 GND 95 A
60 V

DDEXT

DDINT

93 V

96 A

DDINT

DDEXT

VDD

VSS

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
AD2 30 V
V

DDEXT

31 GND 67 V

GND 32 V

DDINT

DDINT

66 GND 102 TRST 138

68 GND 104 TMS 140

AD1 33 GND 69 V

DDINT

DDINT

DDINT

101 TDI 137

103 TCK 139

105 GND 141
AD0 34 DAI_P8 (SFS1) 70 GND 106 CLKIN 142
WR 35 DAI_P9 (SD2A) 71 V
V

DDINT

36 V

DDINT

72 V

DDINT

DDINT

107 XTAL 143

108 V

DDEXT

LQFP
Pin #

110

112

114

116

118

120

124

129
130
131
132

144

15

LC89057W (IC807)

AVR-1906 / AVR-786 / AVC-1620

RXOUT

RX0
RX1
RX2
RX3
RX4

RX5/VI

RX6/UI

LPF

TMCK/PIO0

TBCK/PIO1

TLRCK/PIO2

TDATA/PIO3

TXO/PIOEN

10

13

44
45
46
47

48

1

2
3
4
5
8
9

EMPHA/UO33AUDIO/VO35INT40CL39CE38DI

32

Microcontroller

Clock

27

Input

Selector

Modulation

or

Parallel Port

29

XIN

C bit, U bit

Demodulation

&

Lock Detect

PLL

28

XOUT

Selector

XMCK34CKST

I/F

Data

Selector

I/N

XMODE
41

37

36

21

24

16
17
20
22
23

DO

RERR

RD ATA

SDIN

RMCK
RBCK
RLRCK
SBCK
SLRCK

36 RERR1RXOUT

35 INT2RX0

34 CKST3RX1

TOP VIEW

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

LC89057W Terminal Function

Pin

No.

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

Pin Name

I/O

Function

16

AVR-1906 / AVR-786 / AVC-1620

Pin
No.

Pin Name I/O

Function

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

* For latch-up countermeasure, perform each power supply ON/OFF in the same timing.

BD3811K1 (IC701)

IN31

IN32

IN41

IN42

IN51

IN52

IN61

IN62

IN71

IN72

IN81

IN82

INDVDSR

INDVDSL

INDVDC

INDVDSW

OUT2(+)

OUT2(-)

OUT1(+)

OUT1(-)

IN1DSP

IN1MIX

IN2DSP

IN2MIX

IN22

IN21

IN12

IN11

ROUT32

ROUT31

ROUT22

ROUT21

ROUT12

ROUT11

AGND10

GOUT2

OUTC

VIN2

LOGIC

OUTSL

80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25 26

5.1ch Mode SW2 DSP

27 28 29 30 31 32 33 34 35 36 37 38 39 40

INDSPC

INDSPSL

INDSPSR

5.1ch Mode SW2 DVD

AGND1

INDSPSW

GOUTSW

VINSW

AGND2

5.1ch Mode SW1

VINC

GOUTC

OUTSW

AGND9

TREBLE

BASS

BASS

BOOST

OUTSR

GOUT1

VINSL

VIN1

GOUTSL

64

63

62

61

60

59

58

57

56

55

54

53

52

51

50

49

48

47

46

45

44

43

42

41

TNF2

TNF1

BNF11

BNF21

BNF12

BNF22

BBNF2

OUT2

BBNF1

OUT1

AGND8

AGND7

VCC

AGND6

VEE

AGND5

MUTE

CL

DA

DGND

AGND4

GOUTSR

VINSR

AGND3

17

AD1837 (IC808)

AVR-1906 / AVR-786 / AVC-1620

DSDATA3

DSDATA2

AGND

DGND

DSDATA1

39

38

37

36

35

34

33

32

31

30

29

28

27

NC

OUTL3

MCLKASDATAABCLKALRCLKODVDDDVDD DVDD

PD/RST M/S AVDD AVDD

CLOCK

DIGITAL
FILTER

DIGITAL
FILTER

DIGITAL
FILTER

DIGITAL
FILTER

DescriptionPin No.

DVDD

DBCLK

DLRCLK

M/S

AGND

OUTR4

NC

OUTL4

NC

AGND

AVDD

OUTR3

NC

DAC

DAC

DAC

DAC

VREF

Σ-∆

Σ-

Σ-

Σ-

OUTL1

OUTR1

∆

∆

∆

OUTL2

OUTR2
OUTL3

OUTR3
OUTL4

OUTR4
FILTD
FILTR

DLRCLK

DBCLK

DSDATA1

DSDATA2

DSDATA3

DSDATA4

ADCLP

ADCLN

ADCRP

ADCRN

AD1837 Terminal Function

Pin Name

CLATCH

PD/RST

Σ-∆

ADC

Σ-

∆

ADC

AD1837

Input/

Output

DVDD

CIN

AGND

NC

OUTL1

NC

OUTR1

AGND

AVDD

NC

OUTL2

DGND

CCLK

COUT

ASDATA

ODVDD

MCLK

ALRCLK

ABCLK

50 494847 46 45 44 43 42 41 40

51

52

1

2

3

4

5

6

7

8

9

10

11

12

13

14 15 16 17 18 19 20 21 22 23 24 25 26

NC

OUTR2

SERIAL DATA

I/O PORT

DIGITAL
FILTER

DIGITAL
FILTER

TOP VIEW

FILTD

FILTR

AGND

DGND AGND AGND AGND AGNDDGND

AVDD

DSDATA4

ADCLP

ADCLN

ADCRN

CINCLATCHCCLK COUT

CONTROL PORT

VOLUME

VOLUME

VOLUME

VOLUME

VOLUME

VOLUME

VOLUME

VOLUME

ADCRP

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

18

AVR-1906 / AVR-786 / AVC-1620

TC90A69F (IC612)

TC90A69F (IC609)

COUT

VSS1

28

27

DAC

26

25

DAC

YOUT

24

(8fsc)

CORING

2

VRT

3

VDD1

PEAKING

4

TESTI1

5

INTERPOLATION

1

BIAS VB1

LC75721E (IC301)

G7 G8G9

G10

G11

AA8/G12

AA7/G13

AA6/G14

48 33

49

DI
CL
CE

RES

DD

V

OSCI

OSCO

Vss

TEST

FL

V
G1
G2
G3
G4
G5
G6

64

AM 1

AM 2

AM 3

AM 4

AM 5

AM 6

AM 7

AM 8

VB2

PD

23

PLL DET 1/2VCO

LPF

ADC

6

VRB

VSS2

AA5/G15

AA4/G16

AA3

AA2

AM 9

AM 10

AM 11

AM 12

Ped.
CLIP

AA1

AM35

AM 13

22

1/8

AM 14

7

AM34

AM 15

FIL

21

8fsc 4fsc

Sync. Clamp

8

YCIN

AM33

161

AM 16

VSS4

KILLER

TEST

32

17

VDD4

FSC

TESTOUT

MODE1

SDA

20

19

18

17

16

SCL

15

IIC BUS

CORING V-ENHANCER

DELAY

CNR

C-N.C

9

KILLER

MEMORY

10

TESTI2

LINE

LINE

MEMORY

DYNAMIC COMB FILTER

11

12

VSS3

VDD3

13

VDD2

14

TESTI3

LC75721E Terminal Function

Symbol

V

DD

Vss

AM 17

V

FL

AM 18
AM 19
AM 20

DI

AM 21

CL

AM 22
AM 23

CE

AM 24
AM 25
AM 26

OSCI

AM 27

OSCO

AM 28
AM 29

RES

AM 30
AM 31

AM1~AM35

AM 32

AA1~AA3
AA4/G16

AA5/G15
AA6/G14
AA7/G13
AA8/G12

G1~G11 Grid output terminal
TEST LSI test terminal

Function
Power terminal +5V
Power terminal GND
Power terminal FL drive
Serial data transfer terminal

DI: Data
CL: Clock
CE: Chip enable

External CR connecting terminal

System reset terminal

Anode output terminal

Anode/Grid output terminal

NJM2274R (IC607)

NJM2274R (IC614)

1

2

3

4

Power Save CTL

1Yin

Cin

8 Bias

Clamp

Disc.

CLOCK

8

TOP

VIEW

7

6

5

Vref

Vcc

GND

2

+

+

2

7

7

C Mute CTL

BU2090F (IC302,604,608)

1

VSS

DATA

LCK

Q0

Q1

Q2

Q4

2

3

4

5

6

7

8

9

CONTROL CIRCUIT

12-bi t SHIFT REGI STER

12- bit STRAGE REGI STER

OUTPUT BUFF ER (OPE N DRAI N)

3 Vout
750
ohm

Vsag4

18

VDD

OE

17

16

Q11

Q10

15

Q9

14

Q8

13

12

Q7

Q6

11Q3

Q5

10

TA1270BF (IC901)

TA1270BF (IC606)

DAC237Y OUTPUT36GND35DAC

38

Y OFFSETSWDAC

DAC2

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

39

40

41

42

43

44

45

46

47

48

SUB-

DAC1

CONTRAST

PEDESTAL

CLAMP

fsc

Y DL

TRAP

SYSTEM

fsc

1H DL

CONTROL

SECAM

LPF / fsc

CONTROL

TRAP

BPF H. AFC H C / D

CbCr / UV

SW

VCXO

1

2

3

X’tal

X’tal

M-X’tal

4.43MHz

3.58MHz

TEST34SDA33SCL32Ys

TEST

CONTROL

Y DL

SW

APC

SUB-COLOR

4

5

APC

I2C BUS

C GND

CW

MATRIX

P / N ID

SW

TOF

ACC

6

CHROMA

Ys

7

OUTPUT

(TH=0.7V

HI; 1IN/LOW; 2IN)31R-Y1

TINT

DEMO

CHROMA

BLK

V SEP

SYNC

SEP

8

V-SEP

SYNC.

INPUT30B-Y1

PEDESTAL

OFFSET

SW

INPUT

CLAMP

9

SYNC.

OUTPUT

INPUT29Y1

NOSE

DET

INPUT28I

YUV RGB

MATRIX

10

AFC

FILTER

C

2

11

SYNC.

GND

GND

R-Y2

27

SW

32fH
VCO

12

32fh VCO

INPUT26B-Y2

PEDESTAL

CLAMP

13

VD

V C / D

INPUT25Y2

INPUT

HI: 20h/LOW: 24h

SW

CP / HP

IN

SCP

14

HD

OUTPUT

OUTPUT

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

MM74LCX244
(IC809-811)

TOP VIEW

1

OE

2

I0

3

O4

4

I1

5

O5

6

I2

7

O6

8

I3

912

O7 O3

10 11

GND

19

74LVX157
(IC816)

20

VCC

19

OE2

18

O0

17

I4

16

O1

15

I5

14

O2

13

I6

I7

SE

LECT

GND

1A

1B

1Y

2A

2B

2Y

1

SEL

2

3

4

5

5

6

7

8

16

15

14

13

12

11

10

Vcc

ST

4A

4B

4Y

3A

3B

9

3Y

BA7625 (IC651)
BA7626 (IC612,613,616,652,653)

AVR-1906 / AVR-786 / AVC-1620

Monitor OUT

ABE

MONITOR OUT

LL* IN 1 LL*

H L * IN 2 H L * IN 2 H L *

GND

IN5

GND

IN4

CTL E

IN3

CTL D

1

2

3

6dB

LOGIC

4

5

6

7

6dB

LOGIC

8

16

15

14

13

12

11

10

9

IN1

CTL A

V OUT1

Vcc

IN2

CTL B

V OUT2

CTL C

C D E V OUT 1 C D E V OUT 2



LL* IN 1



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 IN 5 HHH IN 5 HHH IN 5

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).

LC74781 (IC603) BA4510F (IC815A,816A) BU4090BC (IC551-553)

OUT1

Ð IN1

+ IN1

V

1

8

1

2

1ch

+

Ð

3

EE

4

2ch

+

Ð

VCC

7

OUT2

6

Ð IN2

5

+ IN2

STROBE

SERIAL

IN

CLOCK

2

3

4

1

Q

5

Q2

6

Q3

7

Q4

8

V

SS

16

15

14

13

12

11

10

9

V

DD

OUTPUT
ENABLE

Q5

Q6

Q7

Q8

Q'S

QS

BD3812F (IC702) MM74HCT244 (IC812) FAN1117-1.2 (IC824)

RC1117-3.3 (IC823)

FRONT VIEW

IN 1

AGND

IN 2

AGND

V

EE

AGND

CC

V

1

2

3

4

5

6

㧗

㧙

㧗

㧙

LOGIC

14 OUT1

13 OUT2

12 SEL

11

DGND

MUTE

10

DA

9

CL

87

1G

1A
2Y

1A
2Y
1A
2Y
1A
2Y

GND

20 1

V

CC

0

0

1

1

2

2

3

3

19 2

2G

0

18 3

1Y

0

17 4

2A

1

16 5

1Y

1

15 6

2A

2

14 7

1Y

2

13 8

2A

3

12 9

1Y

3

11 10

2A

V

OUT

3

IN

2

2

1

OUT

ADJ/GND

20

LH28F800BJE (IC805)

VCC

B4

A4

Y4

B3

A3 Y3

A1

B1 Y1

A2

B2

Y2

GND

1

2

3

4

5

6

7

8

9

10

11

12

13

14

SN74LV573APW (IC818,819)

1

OE

2

D0

3

D1

4

D2

D3

5

6

D4

7

D5

8

D6

9

D7

GND

10

AVR-1906 / AVR-786 / AVC-1620

Vcc

20

Q0

19

Q1

18

Q2

17

Q3

16

Q4

15

Q5

14

13

Q6

12

Q7

11

LE

OE

11

E

1

D1 D2

D0

234

D

D

D

Q

L

Q0 Q1

L

Q

Q

L

L

1819

17

Q2

D3 D4 D5 D6

567

D

Q

L

16

Q3

D

D

Q

Q

L

L

Q4 Q5 Q6 Q7

D7

89

D

D

Q

Q

L

L

12131415

SN74LVC139APWR (IC820)

FUNCTION TABLE

(each decoder/demultiplexer)

1G

1A

1B
1Y0
1Y1
1Y2
1Y3

GND

1

16

V

2

3

4

5

6

7

8

CC

15

2G

14

2A

13

2B

12

2Y0

11

2Y1

10

2Y2

9

2Y3

INPUTS

SELECT

G

G

B A Y3 Y2 Y1 Y0

L L L H H H L

L L HHHLH

L H LHLHH

L H HLHHH

H X X H H H H

OUTPUTS

OUTPUTS

TC9273N (IC703) SN74LV14APW (IC829) MM74HCT00MT (IC814-815)

1A
1Y
2A
2Y
3A
3Y

GND

1

2

3

4

5

6

7

14

13

12

11

10

V

CC

6A
6Y
5A
5Y

9

4A

8

4Y

21

2. FL DISPLAY

16-ST-82GNK (FL301)

AVR-1906 / AVR-786 / AVC-1620

59

TUNED

STEREO

RDS

CH

G16

TUNED

RDS

CH

G15 G13

STEREO

AUTO

Pin Assignment

AUTO

G14

REC

ZONE2

REC

ZONE2

PHONO

VCR

G12

PHONO

VCR

G11

CD

-

1

G10

CD

-

TUNER

-2-

TUNER

-2-

1

AUX

3 V.AUX

G9

3

G8

DVD /
CDR

G7

AUX

V.AUX

VDP TV

TAPE

/

G6

DVD /
CDR

G5

/

-1-

G4

VDP

TAPE

/

2

DBS

DIGITAL

G3

TV

-1-

PRO LOGICII
DIGITAL

ANALOG

G2

DBS

/

2

DIGITAL

1

G1

PRO LOGICII
DIGITAL

ANALOG

S38

S1

S6

S11

S16

S21

S26

S31

S14

S13

S9

S10

S15

S11

S12

G2~G16

S2

S3

S8

S7

S12

S13

S18

S17

S23

S22

S28

S27

S33

S32

G1

S14

S19

S24

S29

S34

S1

S6

S2

S7

S5

S3

S4

S4

S5

S9

S10

S15

S20

S25

S30

S35

PIN NO.
CONNECTION

PIN NO.
CONNECTION

PIN NO.
CONNECTION

1234 5

F1 F1 S1 S2 S3
21 22

S18

NP

23 24 25

S19 S20 S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 S36 S37

41 42 43 44 45

S38 G16 G15 G14 G13 G12 G11 G10 G9 G8 G7 G6 G5 G4 G3 G2 G1 F2 F2

Anode & Grid Assignment

G1

G2~G16

S1
S2

S3
S4
S5
S6
S7
S8
S9

TV

VDP

2

-

1

TAPE

S36
S37
S38

S1
S2
S3
S4
S5
S6
S7

S1
S2
S3
S4
S5
S6

S7
S8
S9

S9

G1 G2 G3 G4 G5 G6 G7 G8 G9 G10 G11 G12 G13 G14 G15

/

-

S38

DBS

S10
S11

S12
S13
S14

S15

S16
S17
S18

/(DVD)
/(CDR)

6

26

46

G1
S10
S11

S12
S13
S14
S15

DIGITAL

PRO LOGIC

CDR

V.AUX

78910111213141516171819

S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15

S4

27 28 29 30 31 32 33 34

35 36 37 38 39 40

47 48 49 50 51 52 53 54 55 56 57

S16 S17

58 59

F1, F2 : Filament
G1~G16: Grid
S1~S38 : Anode

G2~G16

S10
S11

S12
S13
S14
S15
S16
S17

II

S18

S19
S20
S21
S22
S23
S24
S25
S26

S27

G1

G2~G16

S19
S20
S21
S22
S23
S24

S25
S26
S27

S28
S29
S30
S31
S32
S33
S34
S35

G1

G2~G16

S28
S29
S30
S31

S32
S33

S34
S35

G16

AUXDVD

TUNER

CD

-

2

1

-

-

3

PHONO

VCR

REC

ZONE2

STEREO

AUTO

TUNED

RDS

CH

20

22

PRINTED WIRING BOARDS

MAIN P.W.B. UNIT

AVR-1906 / AVR-786 / AVC-1620

23

COMPONENT SIDE

CPU / FRONT P.W.B. UNIT (1/2)

AVR-1906 / AVR-786 / AVC-1620

24

COMPONENT SIDE

CPU / FRONT P.W.B. UNIT (2/2)

AVR-1906 / AVR-786 / AVC-1620

25

FOIL SIDE

CNT P.W.B. UNIT (1/2)

AVR-1906 / AVR-786 / AVC-1620

26

COMPONENT SIDE

CNT P.W.B. UNIT (2/2)

AVR-1906 / AVR-786 / AVC-1620

27

FOIL SIDE

INPUT-VOL P.W.B. UNIT (1/2)

AVR-1906 / AVR-786 / AVC-1620

28

COMPONENT SIDE

INPUT-VOL P.W.B. UNIT (2/2)

AVR-1906 / AVR-786 / AVC-1620

29

FOIL SIDE

INPUT-VOL-E3 P.W.B. UNIT (1/2) ( E3 Model only)

AVR-1906 / AVR-786 / AVC-1620

30

COMPONENT SIDE