Denon AVR-1804 User manual

SERVICE MANUAL
MODEL AVR-1804/884
AVC-1880
AV SURROUND RECEIVER / AMPLIFIER
16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN
X0173V.01 DE/CDM 0307
For U.S.A., Canada, Europe, U.K.,
Asia, China,Taiwan R.O.C., Korea
& Japan 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

2
2AVR1804/884 / AVC-1880
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-1804/884 / AVC-1880
LEVEL DIAGRAMS
FRONT/CENTR/SURROUND/SURROUND BACK
20dB
10dB
0dB
(200mV)
-10dB
-20dB
6CH IN
40dB
30dB
0dB
(200mV)
-10dB
-20dB
-12dB
6CH IN
CD IN
-10dBFS
-30dBFS
-20dBFS
6CH IN
6CH IN
CENTER
SURROUND
SURROUND BACK
DSP OUT
-10dBFS
-20dBFS
-30dBFS
D/A +
MUTE
6dB
D/A OUT
100mV REF
D/A
-10dBFS
0dBFS
-20dBFS
-30dBFS
-23dBFS
D/A OUT
70.8mV REF
6dB
6dB
D/A OUT
100mV REF
CENTER
SURR/SB
6CH IN
CD IN
0dBFS
A/D
+- --A/D
10dB
20dB
30dB
40dB
FRONT
INPUT
BUFFER
AMP
A/D IN
REV AMP
A/D IN
REV AMP
A/D IN
REV AMP
DIR
DIGITAL
D/A OUT
LPF REV AMP SW SUM
REV AMP
+
HPF
MUTE
DSP D/A ----
SUM S/W
+
D/A
0dBFS
MUTE
+
ELECTRIC
VOLUME PRE AMP TONE POWER AMP
SPK OUT
FRONT
2.83V
(1W/8ohm)
SPK OUT
FRONT
ATT H/P OUT
-18dB
-15dB
VOL 00
25.5dB
15.5dB
VOL 00
MUTE
+
15.5dB
-18dB
H/P OUT
47mV
(1W 8ohm)
-35.5dB
25.5dB
SPK OUT
CENTER
SURROUND
SPK OUT
2.83V
(1W/8ohm)

4
4
AVR-1804/884 / AVC-1880
SUB WOORER
10dB
10.5dB
6dB
Config1 -38dBFS
Config2 -28dBFS LFE
-20dBFS
-30dBFS
LFE
6dB
6dB
Front D/A Out
200mV ref
6CH IN
0dBFS
-10dBFS
D/A
OdB
10dB
20dB
30dB
-10dB
-20dB
-30dB
-5dB
(200mV)
(112mV)
MUTE
+D/A
SUB_WOOFER
----DSP OUT
D/A OUT
LPF SW SUM
REV AMP
REV AMP
6CH INPUT
+
MUTE
ELECTRIC
VOLUME PRE AMP
SUB WOOFER
PRE OUT
SUB WOOFER
PRE OUT
150mV
-15dB
21.5dB
VOL 00
TO FRONT CH

5
5
AVR-1804/884 / AVC-1880
BLOCK DIAGRAM
LINE_1
TV/DBS
LINE_2
LINE_3
CR
CB
Y
DVD/VDP
LINE_3
LINE_2
LINE_1
CR
CB
Y
D-VIDEO INPUT
JAPAN ONLY
VCR2 OUT
MULTI OUT
EX_SR
EX_SL
EX_FR
EX_FL
6CH_INPUT
EX_C
FM ANT
EX_SW
AM ANT
LOOP FILTER
E3 ONLY
MUTING
FROM u-COM
FM
FRONTEND
IF FILTER
PLL CIRCUIT
IF FILTER
AM TUNING
IF AMP
MPX IC
FM & AM
IF IC
L.P.F
--
R
L
BUFF
+
HPF
+
-
+
L/R SUM
DIGITAL
FILTER
ADC
CODEC
AD1837
VOLUME
VOLUME
DIGITAL
FILTER DAC
+
RMC GND
IN
CXA1511M
RMC IN/OUT
< AVR1804 E1,E2,E3,EK,E1H,E1C >
C-VIDEO INPUT
COMP-VIDEO
INPUT
DVD/VDP
TV/DBS
DVD/VDP
TV/DBS
VIDEO SWITCH
VIDEO SWITCH
VIDEO SWITCH
VCR-1
VCR-2
VCR1 OUT
V.AUX
INH
D-VIDEO OUTPUT
LINE_3 LINE_2 LINE_1
CR
CB
Y
S-VIDEO INPUT
VIDEO SWITCH
VIDEO SWITCH
INH
DVD/VDP
TV/DBS
VCR-1
VCR-2
V.AUX
VCR-1 OUT
VCR-2 OUT
VCR2 OUT
REC_SWITCHIG
ANALOG IN
DIGITAL IN
COAXIAL
OPTICAL_4
OPTICAL_3
OPTICAL_2
OPTICAL_1
DVD/VDP
CDR/TAPE
TV/DBS
VCR1
VCR2
PHONO
+
CD
V.AUX
TUNER
(JAPAN ONLY)
ANALOG OUT
CDR/TAPE OUT
VCR1 OUT
DIGITAL OUT
RCLK1(68)
TCLK1(65)
ROM
512K X 8
TCLK2(47)
RAM
64KX16
74LV244
BUFFER
fs
64fs
64fs
64fs RBCK(17)
DIR
LC89057W-VF4
DIGITAL AUDIO DECODER
-
SERIAL DATA
I/O PORT
COUT
DIGITAL
FILTER
ADC
FROM MICOM
TC9274-011
INPUT_SWITCHIG
TC9273-004
Lock DetectSelector
XMCK
Selector
&
INPUT
DEMODULATION
DATA
fs
RDATA(21)
RLRCK(20)
RMCK(16)256fs
CCLK
CLATCH
CIN
ALRCK
MCLK
ABCLK
ASDATA
DSDATA1
CLOCKCONTROL PORT
VOLUME
FL/FR/C/SL/SR/SW/SB
fs
256fs
MELODY 32
PF6(41)
RFS1(69)
RCLK0(61)
DR0(60)
DR1(67)
CLK_IN(132)
DT0(56)
TCLK0(57)
+
VOLUME
VOLUME
VOLUME
DIGITAL
FILTER
VOLUME
VOLUME
DIGITAL
FILTER
DIGITAL
FILTER
+
+
DAC
DAC
+
+
+
DAC
SW F SUM
-
-
-
-
--
TUNER PLL
DATA CXP740096
u-COM
CONTROL DATA
DIGITAL AUDIO
AUDIO SWITCHING
TC9164
TC9482
VOLUME
EX_FL
DSP_FL
ANA_HFP
ANA_IN
FLT DRIVER
DATA LC75721NE
FL DRIVER
EX_C
CENTER
EX_SR
SR
SW
EX_SW
EX_SL
ANA_HFP
ANA_IN
DSP_FR
SL
EX_FR
REMOTE CONT
IN/OUT
12MHz
RESONATOR KEY_MATRIX
TC9184
TONE POWER AMP
TONE DFT CON.
FL DISPLAY
16-ST-42GNK
SPK A
+
-
+
SPEAKER OUT
+
-
+
FRONT A L
FRONT A R
FRONT B L
-
SPK B
+
+
+
+
-
SURR L
+
-
SURR R
+
-
FRONT B R
+
CENTER
+
BA7626
BA7626
Y
C
1212
9
15
4
5
2
13
14
IC1001
IC1004
IC1001
+5V
MONITOR OUT
Q653
MONITOR OUT
Q1014Q656
12
14
13
14
12133
IC1004 IC1008
3.3V
2.5V
DSP
DSP
DIR
BA7626
IC606
OSD
LC74781
115
15
S-VIDEO DET
BA7626
2
IC1001
BA7626
C-VIDEO DET
15
1
2
IC1008
NJM2509V
13 4 3
5
Q1022
IC1008
IC1007
C
1
Q1012
MUTE
+5.6V (Y,CB,CR SWITCHING SAME)
+5.6V
RMC DATA
OUT
KIC9459
AVR
RELAY B+
-36V
FLT
M5-MT
L601
Y/C
MIX
Y/C
ÝÂ×î
YCY
Q1017
7805
+5V (A/D POWER)
FUNCTION,OP AMP
TUNER
VIDEO POWER
+5V (DSP PART PWR)
FUNCTION,OP AMP
CODEC
7915
7805
LOW DROP
7805
7815
MAIN -B
MAIN +B
+
MUTE
-
H/P OUT
SW
+
-
+
PRE OUT
+
-
SURR BACK/MULTI
FL DRIVER
u-COM
FILAMENT AC
7805
RELAY

6
6
AVR-1804/884 / AVC-1880
ADJUSTMENT
Tuner Section (AVR-1804/884 only)
CONNECTION DIAGRAM OF MEASURING INSTRUMENTS


FM
STEREO
MODULATOR
FM SSG
Digital
Voltmeter
75ohm
T402 T403
IC402
VR402
TUNER B'D
R471
20 +14
−10 dB


AM
T402 T403
IC402
TUNER B’D
R471
VR401
FM ALIGNMENT
Input Output Adjustment
Step Alignment
Item
Tuning
Frequency
Setting Type Frequency Input
Level Modulation Coupling Type Connect to Points Adjust to
1Center
Adjustment
98.1MHz
(98.0MHz) FM SSG 98.1MHz 60dBµMono 1kHz 100%
Antenna
Terminal
Digital
Voltmeter R471 T402 ±50mV
2 Distortion 98.1MHz
(98.0MHz) FM SSG 98.1MHz 60dBµMono 1kHz 100%
Antenna
Terminal
Distortion
Meter
Output
Terminal (L) T403 Minimum Distortion
3 Repeat Steps 1 and 2
4 Signal Level 98.1MHz
(98.0MHz) FM SSG 98.1MHz 20dBµOFF Antenna Terminal
Light “TUNED” on
FL Display VR402
AM ALIGNMENT
Output Adjustment
Step Alignment
Item Frequency Input Type Connect to Points Adjust to Remarks
1 Signal Level 999 (1000)
kHz AM SSG 
VR401 Light “TUNED” on
FL Display
SSG OUTPUT
74dBµ(EMF)

7
7
AVR-1804/884 / AVC-1880
Audio Section
Idling Current
Required measurement equipment : DC Voltmeter
調整に必要な測定器:直流電圧計
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.)
(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。
Adjustment
(1) Remove top cover and set VR101, VR102, VR103, VR104, VR105 on Amp. Unit, VR106 on SURR.-BACK ch Amp.
Unit at full 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 ch: CP106).
(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 clockwise ( ) 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.
(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ch:CP106) に直流電圧計を接続します。
(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。
●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‑A （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。
VR104
TR104
VR105
TP105
VR106
CP106
S Back ch
S Rch
VR102
TP102
VR103,TP103
C ch
VR101,TP101
F Lch
S Lch
F Rch
DC Voltmeter

8
8
AVR-1804/884 / AVC-1880
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。


IC’s
CXP740010
(IC201)
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
CXP740096 Terminal Function
1 9274 STB O TC9274 CONTROL
2 9274 73 9164 CLK O TC9274/TC9273/TC9164 CONTROL
3 9274 73 9164 DAT O TC9274/TC9273/TC9164 CONTROL
4 FRONT MUTE O FRONT MUTE
5 9273 CE O TC9273 CONTROL
6 ERR MUTE O ERR MUTE
7 ERR MUTE OFF O ERR MUTE OFF
8 89057 AUDIO I LC89057 CONTROL
9 89057 EMPHA I LC89057 CONTROL
10 SW SUM O SW SUMMING CONTROL
11 M32 SDIN I DATA INPUT FROM MELODY32
12 89057 SDIN I DATA INPUT FROM LC89057
13 EPROM RESET O EPROM RESET
14 89057 RESET O LC89057 RESET
15 M32 CS O MELODY32 CS
16 M32 SDOUT O MELODY32 CONTROL DATA
17 89057 CE O LC89057 CE
18 89057 1837 SDOUT O CONTROL DATA
19 89057 1837 SCLK O CONTROL CLOCK
20 1837 RESET O CODEC RESET
21 9164 CE O TC9164 CONTROL
22 SW MUTE O SW MUTE
23 RELAY SPK B O SURROUND BACK RELAY
Pin
No. Pin Name FunctionI/O

9
9
AVR-1804/884 / AVC-1880
Pin
No. Pin Name FunctionI/O
24 RELAY SPK A O FRONT A RELAY
25 RELAY SURR O SURROUND RELAY
26 RELAY CNT O CENTER RELAY
27 RELAY H/P O H/P RELAY
28 FUNC UP I ENCODER INPUT(FUNCTION)
29 H/P DETECT I H/P DETECT
30 FUNC DOWN I ENCODER INPUT(FUNCTION)
31 NC -
-
-
-
-
-
-
-
-
-
-
-
-
34 SURR MUTE O
O
O
SURROUND MUTE
KIC9459 CONTROL STB
ZONE2/SURROUND BACK : SELECTION RELAY
FRONT B RELAY
35 9459 STB
36 MULTI SB RLY
37 RELAY SPK B
38 FL DRV RESET O LC75721NE RESET
39 RELAY POWER O POWER RELAY
40 RESET I RESET
41 GND I
42 XTAL
43 EXTAL
44 FL DRV CE O LC75721NE CE
45 FL DRV DATA O LC75721NE DATA
46 FL DRV/2090 CLK O CONTROL CLOCK
47 2090 DATA O BU2090F DATA
48 VOL DOWN I ENCODER INPUT(VOLUME)
49 VOL UP I ENCODER INPUT(VOLUME)
50 SEL DOWN I ENCODER INPUT(SELECT)
51 SEL UP I ENCODER INPUT(SELECT)
52 AV SS
53 V REF
54 AV DD
55 89057 INT
56 GND
57 STEP OPT I AREA SELECT
LC89057 INT
58 SET OPT I MODEL SELECT
59 GND
60 KEY IN3 I KEY INPUT
61 KEY IN2 I KEY INPUT
62 KEY IN1 I KEY INPUT
63 9K/10K STEP I TUNER STEP SELECT
64 PROTECT I PROTECTION
65 C-VIDEO DET I
I
Composite Signal detect input (H: Signal input)
S Signal detect input (H: Signal input)
66 M32 SCLK O MELODY32 CLOCK
67 1837 CE O CODEC CE
68 M32 RESET O MELODY32 RESET
69 S-VIDEO DET
70 STBY LED O
O
O
STANDBY LED
LC74781 CONTROL ENABLE
LC74781 CONTROL CLOCK
71 NC
72 NC
73 74781 CS
74 74781 SCLK
75 SURR BACK MUTE O SURROUND BACK MUTE
76 2090 CLK2 O BU2090 CONTROL CLOCK2 (VIDEO)
32 CNT MUTE O CENTER MUTE
33 NC

10
10
AVR-1804/884 / AVC-1880
Pin
No. Pin Name FunctionI/O
77 PWR DOWN I
I
POWER DOWN DETECT
78 RDS CLK O
O
TDA7330 CONTROL CLOCK
79 RDS DATA O TDA7330 CONTROL DATA
MUTE power ON/OFF switching
80 MUTE PWR
81 9184 CE O TC9184 CONTROL
82 M32 INTREQ I/O MELODY32 CONTROL
83 MULTI MUTE O MULTI MUTE
84 S. MONITOR DET S Monitor connection detect input (L: Connected)
85 REMOCON I
-
-
-
-
-
REMOTE CONTROL SIGNAL INPUT
86 GND
87 GND
88 V SS
89 V DD VDD BACK UP
90 NC
91 TC9482 CE O TC9482 CONTROL
92 PLL DATA O PLL CONTROL (LC72131), DATA (TC9482, TC9184, KIC9459)
PLL CONTROL (LC72131), CLOCK (TC9482, TC9184, KIC9459)
PLL CONTROL (LC72131),
93 PLL CLK O
94 PLL DT IN O
95 TU MUTE O TUNER MUTE
96 STEREO I STEREO DETECT
97 TUNED I TUNED DETECT
98 PLL CE O PLL CONTROL
99 2090 CLK 1 VIDEO O BU2090 CONTROL CLOCK1 (VIDEO)
100 2090 DATA VIDEO O BU2090 CONTROL DATA (VIDEO), LC74781 CONTROL DATA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
A15
A14
A13
A12
A11
CE
I/O0
I/O1
I/O2
I/O3
Vcc
GND
I/O4
I/O5
I/O6
I/O7
WE
A10
A9
A8
A7
NC
A0
A1
A2
OE
UB
LB
I/O15
I/O14
I/O13
I/O12
GND
Vcc
I/O11
I/O10
I/O9
I/O8
NC
A3
A4
A5
A6
NC
A0-A15
CE
OE
WE
64K x 16
MEMORY ARRAY
DECODER
COLUMN I/O
CONTROL
CIRCUIT
GND
VCC
I/O
DATA
CIRCUIT
I/O0-I/O7
Lower Byte
I/O8-I/O15
Upper Byte
UB
LB
CE
OE
WE
LB
UB
PIN DESCRIPTION
Pin Name
Address inputs
Symbol
A0-A15
Data Inputs/Outputs
I/O0-I/O15
Chip Enable Input
Output Enable Input
Write Enable Input
Lower-byte Control (I/O0-I/O7)
Upper-byte Control (I/O8-I/O15)
No ConnectionNC
Power
V CC
GroundGND
IS61LV6416 (IC806)
PIN DESCRIPTION
Pin Name
Address Inputs
Symbol
A0-A18
Data Input/Outputs, Command Inputs
DQ0-DQ7
Data Input/Outputs
DQ8-DQ14
Data Input/Output or Address Input
DQ15A-1
Chip Enable
Output Enable
Write Enable
Reset/Block Temporary Unprotect
Ready/Busy OutputRB
Byte/Word OrganizationBYTE
Supply VoltageV CC
GroundV SS
No Connected InternallyNC
Don’t Use as Internally ConnectedDU
E
G
W
RP
A1 A0
A2 E
A3 V SS
A4 G
A5 DQ0
A6 DQ8
A7 DQ1
A17 DQ9
A18 DQ2
RB DQ10
NC DQ3
NC DQ11
RP V CC
W DQ4
NC DQ12
NC DQ5
A8 DQ13
A9 DQ6
A10 DQ14
A11 DQ7
A12 DQ15A-1
A13 V SS
A14 BYTE
A15 A16
24
13
12
1
25
36
37
48
M29W800T
M29W800T
19
A0-A18
W
DQ0-DQ14
M29W800AT
E
15
G
RP
DQ15A-1
BYTE
RB
V
CC
V ss
M29W800AT (IC805)

11
11
AVR-1804/884 / AVC-1880
MELODY32 (IC804)
Pin Name
MELODY32 Terminal Function
Pin
No. Pin Name
Pin
No.
Pin Name
Pin
No.
Pin Name
Pin
No.
Pin Name
Pin
No.
Pin Name
Pin
No.
1 D14
2 D15
3 HAD0
4 HAD1
5 GND
6 HAD2
7 HAD3
8 HAD4
9 HAD5
10 HAD6
11 HAD7
12 HAD8
13 V DDEXT
14 HAD9
15 HAD10
16 GND
17 HAD11
18 HAD12
19 V DDINT
20 HAD13
21 HAD14
22 HAD15
23 HA16
24 HACK_P
25 V DDEXT
26 HACK
27 HCMS
28 HCIOMS
29 GND
30 HALE
31 HRD
32 HWR
33 GND
34 PF0
35 PF1
36 PF2
37 PF3
38 PF4
39 PF5
40 V DDEXT
41 PF6
42 PF7
43 TMR0
44 TMR1
45 TMR2
46 DT2
47 TCLK2
48 TFS2
49 DR2
50 RCLK2
51 RFS2
52 RXD
53 TXD
54 GND
55 GND
56 DT0
57 TCLK0
58 V DDINT
59 TF50
60 DR0
61 RCLK0
62 RFS0
63 V DDEXT
64 DT1
65 TCLK1
66 TFS1
67 DR1
68 RCLK1
69 RFS1
70 BMODE0
71 BMODE1
72 BYPASS
73 RESET
74 TDO
75 TDI
76 TMS
77 GND
78 TCK
79 TRST
80 GND
81 EMU
82 V DDINT
83 OPMODE
84 A0
85 A1
86 A2
87 A3
88 A4
89 A5
90 V DDEXT
91 A6
92 A7
93 A8
94 GND
95 A9
96 A10
97 A11
98 A12
99 A13
100 V DDEXT
101 A14
102 A15
103 A16
104 A17
105 GND
106 A18
107 A19
108 A20
109 A21
110 BGH
111 BG
112 BR
113 BMS
114 IOMS
115 MS0
116 MS1
117 MS2
118 V DDEXT
119 MS3
120 ACK
144
1
109
108
72
73
36
37
TOP VIEW
121 WR
122 RD
123 D0
124 D1
125 D2
126 D3
127 V DDINT
128 D4
129 GND
130 CLKOUT
131 V DDEXT
132 CLKIN
133 XTAL
134 GND
135 D5
136 D6
137 D7
138 D8
139 D9
140 D10
141 D11
142 D12
143 V DDEXT
144 D13

12
12
AVR-1804/884 / AVC-1880
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

13
13
AVR-1804/884 / AVC-1880
LC89057W Terminal Function
Function
Pin
No. Pin Name
LC89057W (IC807)
1 RXOUT O Input bi-phase select data output terminal
2 RX0 I5TTL compatible digital data input terminal
3 RX1 I Coaxial compatible amp built-in digital data input terminal
4 RX2 I5TTL compatible digital data input terminal
5 RX3 I5TTL compatible digital data input terminal
6 DGND — Digital GND
7 DVDD — Digital power
8 RX4 I5TTL compatible digital data input terminal
9 RX5/VI I5TTL compatible digital data/Validity flag input terminal for modulation
10 RX6/UI I5TTL 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 I5Serial 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

14
14
AVR-1804/884 / AVC-1880
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 I5µcom I/F, write data input terminal
39 CE I5µcom I/F, chip enable input terminal
40 CL I5µcom I/F, clock input terminal
41 XMODE I5System 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
LA1266 (IC402)
10
4
13
8
19
15
17
18
14
21
22
GND
Vcc
5
11
IF
BUFFER
IF
BUFFER
2
FM - IF
6
Q.D.
7
REG
23
OSC OSC
BUFFER
24
NARROW
S-METER S-METER
16
LED
DRIVER
RF MIX
12
20
AM-IF DET
AGC
POST
AMP
9
13
AM-IF FM-IF FM-IN
AM-IN

20 19 18 17 16 15 14 13 12
9
8
7
56
1
21
LA3401 (IC403)
22
VOL
REG OSC
SYMMETRICAL
REOCTANCE
CIRCUIT
PHASE
COMPARATOR
VCO STOP
PILOT DET
FF FF
38kHz
FF
38kHz 90°
FF
19kHz 90°
MUTING
FM AM CHANGE
Ro
Rc
Rc Rb
234
DECODER MUTING CONTROL
FM AM CHANGE OVER
Vcc ON
MUTING
MUTING
OUTPUT
STEREO
SWITCH
TRIGGER
LAMP
DRIVER
Rb
10 11
LC72131 (IC401)
120
219
318
417
516
615
714
813
912
10 11
XIN
CE
DI
CL
DO
BO1
BO2
BO3
BO4
IO1
AOUT
AIN
PD
VDD
FMIN
AMIN
IO2
IFIN
Vss
XOUT
124
12 13
FF

15
15
AVR-1804/884 / AVC-1880
BU2090F (IC302, 1003, 1005)
MM74LCX244 (IC809~811)
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
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
1 2- bi t STRA GE REGI ST ER
OUTPUT BUFFER(OPENDRAIN)
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
VDD
OSCI
OSCO
Vss
TEST
VFL
G1
G2
G3
G4
G5
G6
LC75721E (IC301)
V
DD
V
SS
V
FL
DI
CL
CE
DI: Data
CL: Clock
CE: Chip enable
OSCI
OSCO
RES
AM1~AM35
AA1~AA3
AA4/G16
AA5/G15
AA6/G14
AA7/G13
AA8/G12
G1~G11
TEST
Symbol
LC75721E Terminal Function
Power terminal +5V
Power terminal GND
Power terminal FL drive
Serial data transfer terminal
External CR connecting terminal
System reset terminal
Anode output terminal
Anode/Grid output terminal
Grid output terminal
LSI test terminal
Function

1
2345678 9 10 11 12 13 14 15 16 17 18 19
20
21
22
23
24
25
26
27
28
29
3031
32
33
34
35
36
37
3839
40
41
42
VDD
VSS
S1 S2 S3 S4 S5 S6 S7 S8 S9
S10 S11 S12 S13 S14 S15 S16 S17 S18
GND
CK
DATA
STB
S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16 S17 S18
18 bit Latch Circuit (Rch)
(Lch) Same as Rch
Level Shift + Shift Register Circuit
TC9274N-011 (IC701)
TC9273N-004 (IC702)
S2
S3
S4
S5
S6
S7
S8
S9
S10
S1
V DD
STB
DATA
S2
S3
S4
S5
S6
S7
S8
S9
S10
GND
CK
Vss
S1
13
14
1
3
4
5
6
7
8
9
10
11
12
2
15
16
28
27
26
25
24
23
22
21
20
19
18
17
1
13
28
2~12
12~27
14
15
16
Vss
GND
V
DD
S1~S10
CK
DATA
STB
GND=0V
Vss=-8.0~-17V
GND=0V
Border Input
Pin No Symbol Name Function
Dual Power Use:VDD = 8.0~17 V Single Power Use:VDD = 8.0~18V
+Power Terminal
Digital Ground
+Power Terminal
I/O Terminal
Clock Input Low level
Terminal
Clock input for data transfer.
Serial input for switch setting.
Strobe InputStrobe input for data writing.Strobe Input
Data Input
Input terminal of analog switch.
TC9273N Terminal Function

16
16
AVR-1804/884 / AVC-1880
MM74HC4053MX (IC1001, 1004, 1008)
1
2
V
EE
3
4
5
6
7
89
10
11
16
15
14
13
12
Y1
Y0
Z1
Z
Z0
Enable
GND
Vcc
Y
X1
X
X0
C
A
B
X = Don’t Care
X = Don’t Care
Truth Table
Control Inputs
Select
Enable C B A
ONSwitches
L L L L Z0 Y0 X0
L L L H Z0 Y0 X1
L L H L Z0 Y1 X0
L L H H Z0 Y1 X1
L H L L Z1 Y0 X0
L H L H Z1 Y0 X1
L H H L Z1 Y1 X0
L H H H Z1 Y1 X1
H X X X None
Truth Table
KIC9459F (IC706)
BU4052BCF
(IC601D,602D)
Y 0
Y 2
COMMON Y
Y
3
Y 1
INH
V
EE
Vss
V DD
X 2
X 1
COMMON X
X
0
X 3
A
B
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
B
X
2
X 1
XOUT
/IN
X
0
X
3
A
Y
2
YOUT
/IN
Y3
Y
1
INH
V
EE
Y 0
L-LD2
8
L-ch7 to 91decoder
R-ch latch circuit
R-ch7 to 91decoder
9 16
19
3
2
4
5
6
7
10
11
12
24
22
23
21
20
18
17
15
14
13
1
NC
L-OUT
L-IN
L-LD1
L-A-GND
NC
NC
GND
CK
V
SS
V
DD
NC
R-OUT
R-LD1
R-LD2
R-A-GND
NC
CS2
NC
STB
DATA
R-IN
50kohm/
91STEP
VR
Same as L-ch
L-ch latch circuit
Shift register (24Bit)
Level shift circuit
CS1
INH B ON SwitchesA
X
0 Y 0
X 1 Y 1
X 2 Y 2
X 3 Y 3
L
L
L
H
HL
HH
X NONEX
L
L
L
L
H
MM74HCT244 (IC812)
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
BA7625 (IC605D)
BA7626 (IC603D,604D,651-654,
1000,1002)
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
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).
C D E V OUT 2
LL* IN1
HL * 
LH* IN3
HHL IN4
HHH IN5
C D E V OUT 1
LL* 
HL * IN2
LH* IN3
HHL IN4
HHH IN5
ABE
MONITOR OUT
LL* IN1
HL * IN2
LH* IN3
HHL IN4
HHH IN5
TC9184AP (IC552)
2
3
4
5
6
116 78 910
15
14
13
12
11
BASS+
BASS-
COM
TREBLE-
TREBLE+
Vss VDD GND CK DATA STB
BASS+
BASS-
COM
TREBLE-
TREBLE+
Ladder resister
Analog switch
13 bit latch circuit
Level shift
20 bit Shift register circuit
Analog switch
Ladder resister
Ladder resister
Analog switch
13 bit latch circuit
Code
detect
circuit
Analog switch
Ladder resister

17
17
AVR-1804/884 / AVC-1880
LC74781 (IC1006)
PinNo. Symbol Name
1VSS1GND
2 XtalIN Xtaloscillation
3 XtalOUT Xtaloscillation
4 CTRL1 Xtaloscillationinputswitching
5BLANKBlankoutput
6 OSCIN LCoscillation
7 OSCOUT LCoscillation
8 CHARA Characteroutput
9 CS Enableinput
10 SCLK Clockinput
11 SIN Datainput
12 VDD2 Power
13 CVOUT VIDEOsignaloutput
14 NC
15 CVIN VIDEOsignalinput
16 VDD1 Power
17 SYNIN Sync.separatecircuitinput
18 SEPC Sync.separatecircuitbiasvoltage
19 SEPOUT Complexsync.signaloutput
20 SEPIN Verticalsync.signalinput
21 CTRL2 NTSC/PAL-Mswitchinginput
22 CTRL3 SEPINinputcontrol
23 RST Resetinput
24 VDD1 Power(+5V)
CS
9
RST
23
VSS1
1
SIN
11
SCLK
10
OSCIN
6
OSCOUT
7
SYNIN
17
SEPC
18
SEPOUT
19
CHARA
8
VDD2
12
SEPIN
20
CTRL3
22
4
CTRL1 XtalIN XtalOUT BLANK CVIN CVOUTCTRL2
21 2 3 5 15 13
VDD1
24
Serial
parallel
converter
8-bits
latch
+
command
decoder Horizontal
character
size
register
Horizontal
size
counter
Horizontal
display
position
register
Horizontal
dot
counter
Vertical
display
position
register
Vertical
dot
counter
Blinking
and inversion
control
register
Blinking
and inversion
control
circuit
Blinking
and inversion
control
register
Blinking
and inversion
control
register
Character
control
counter
Line
control
counter
Timing generator Synchronization
signal generator
Character output control
Background control
Video output control
Display
control
register
RAM
write
adress
counter
Display
RAM
Vertical
character
size
register
Vertical
size
counter
Decoder
Font
RAM
Shift
register
Decoder
Horizontal
character
size
register
Horizontal
character
size
register
Horizontal
character
size
register
Horizontal
character
size
register

18
18
AVR-1804/884 / AVC-1880
1
2
3
4
Yin
GND
Vout
Vsag
8
7
6
5
Cin
Cmute
Power Sav
e
Vcc
(IC1007)
NJM2274
DTA114EK
DTC144EK
DTC114TK
DTA144EK
DTC114YK
DTC144EK
TOP
VIEW
E
B
C
B
C
E
R1
R2
B
C
E
R1
R2
DTA114ES
DTA114YS
DTA114ES
DTC114TS
DTC114YS
DTC144ES
FRONT
VIEW
B
C
E
DTA Series DTC Series
DTA114EK
DTA114YS
R1
10kohm
R2
10kohm
DTA144EK 47kohm 47kohm
DTA144ES 47kohm 47kohm
10kohm 47kohm
DTA114ES 10kohm 10kohm
DTC114EK
DTC114YK
10kohm 10kohm
DTC114TK 10kohm
DTC144EK
R1 R2
47kohm 47kohm
10kohm 47kohm
DTC144ES 47kohm 47kohm
DTC114YS 10kohm 47kohm
DTC114TS 10 -
-
kohm
TRANSISTORS

19
19
AVR-1804/884 / AVC-1880
16-ST-66GNK (FL301)
S38
S14
S9 S1
S2
S3
S4
S5
S12
S13
S7
S15
S6
S10
S11
G1
G1
G2
G3
G4
G5
G6
G7
G16 G15 G13 G12 G10 G9
158
G14 G11 G8
G2~G16
12345
6
7 8 9 10 11 12 13 14 15 16 17 18 19
23 24 25
26
27 28 29 30 31 32 33 34
F1 F1 S1 S2 S3
S4
S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16 S17
20
21 22 35 36 37 38 39 40
41 42 43 44 45
46
47 48 49 50 51 52 53 54 55 56 57
S18
S19 S20 S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 S36 S37 S38
G16 G15 G14 G13 G12 G11 G10 G9 G8 G7 G6 G5 G4 G3 G2 G1 F2 F2
58
S13
S14
S15
S16
S17
S18
S19
S20
S21
S22
S23
S24
G1 G2 G3 G4 G5 G6 G7 G8 G9 G10 G11 G12 G13 G14 G15 G16
S38
S36
S37
S38
- 2
DBS
TV
- 1
VDP
TAPE
//(DVD)
/(MD)
AUXDVD
CDR
V.AUX
TUNER
- 2
- 3
CD
-
1
PHONO
VCR
REC
ZONE2
STEREO
AUTO
TUNED
RDS
CH
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S1
S2
S3
S4
S5
S6
S7
S9
S10
S11
S12
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
S15
S16
S17
S18
S19
S20
S21
S22
S23
S24
S13
S14
S15
S25
S26
S27
S28
S29
S30
S31
S32
S33
S34
S35
S25
S26
S27
S28
S29
S30
S31
S32
S33
S34
S35
G2~G16
G1
G2~G16
G1
G2~G16
G1
G2~G16
G1
DIGITAL
PRO LOGICII
S1
S6
S11
S16
S21
S26
S31
S2
S7
S12
S17
S22
S27
S32
S3
S8
S13
S18
S23
S28
S33
S4
S9
S14
S19
S24
S29
S34
S5
S10
S15
S20
S25
S30
S35
TUNED
RDS
STEREO
AUTO
REC
ZONE2
PHONO
VCR
CD
- 1
TUNER
- 2 - 3 V.AUX
AUX
CDR
DVD /
/TAPE
VDP TV
- 1 - 2
/DBS
PRO LOGICII
DIGITAL
DIGITAL
ANALOG
TUNED
RDS
STEREO
AUTO
REC
ZONE2
PHONO
VCR
CD
-
1
TUNER
-
2
-
3V.AUX
AUX
CDR
DVD /
/TAPE
VDP TV
-
1
-
2
/DBS
CH
CH
PRO LOGICII
DIGITAL
DIGITAL
ANALOG
FL DISPLAY
Pin Assignment
F1, F2 : Filament
G1~G16: Grid
S1~S38 : Anode
PIN NO.
CONNECTION
PIN NO.
CONNECTION
PIN NO.
CONNECTION
Anode & Grid Assignment

20
20
AVR-1804/884 / AVC-1880
PRINTED WIRING BOARDS
MAIN P.W.B. UNIT
COMPONENT SIDE