Denon AVR-1603 Service Manual

For U.S.A., Canada, Europe, U.K.,
Australia, Asia, China, Hong Kong,
Taiwan R.O.C. & Korea model

SERVICE MANUAL

Hi-Fi Component

MODEL

AVR-1603/683

AV SURROUND RECEIVER

 Some illustrations using in this service manual are slightly different from the actual set.

16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN

Telephone: [phone]

X0152 NC 0209

AVR-1603/683

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, mak e 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.

SPECIFICATIONS



 Audio Section



Power Amplifier

Rated output: Front: 80W+80W (8Ω/ohms, 20Hz~20kHz with 0.08% T.H.D )

Center: 80W (8Ω/ohms, 20Hz~20kHz with 0.08% T.H.D )

Surround: 80W+80W (8Ω/ohms, 20Hz~20kHz with 0.08% T.H.D )

Output terminals: Front: A or B 6 to 16Ω/ohms

LINE input - SPEAKER OUT
Input sensitivity/input impedance:
Frequency response: 10Hz~100kHz: +1, −3dB (TONE DEFEAT ON)
S/N ratio: 98dB (IHF-A weighted) (TONE DEFEAT ON)

Center/Surround: 6 to 16Ω/ohms

200mV/47kΩ/kohms

70W+70W
110W+110W (6Ω/ohms, 1kHz with 0.7% T.H.D )
100W+100W (6Ω/ohms, 1kHz with 0.7% T.H.D ) (Europe, U.K. & Australia Models)
110W+110W (6Ω/ohms, EIAJ ) (Asia Model)

70W
110W (6Ω/ohms, 1kHz with 0.7% T.H.D )
100W (6Ω/ohms, 1kHz with 0.7% T.H.D ) (Europe, U.K. & Australia Models)
110W (6Ω/ohms, EIAJ ) (Asia Model)

70W+70W
110W+110W (6Ω/ohms, 1kHz with 0.7% T.H.D )
100W+100W (6Ω/ohms, 1kHz with 0.7% T.H.D ) (Europe, U.K. & Australia Models)
110W+110W (6Ω/ohms, EIAJ ) (Asia Model)

A+B 12 to 16Ω/ohms

(8Ω/ohms, 20Hz~20kHz with 0.08% T.H.D ) (Europe, U.K., Australia & Asia)

(U.S.A., & Canada Models)

(8Ω/ohms, 20Hz~20kHz with 0.08% T.H.D ) (Europe, U.K. & Australia & Asia)

(U.S.A., & Canada Models)

(8Ω/ohms, 20Hz~20kHz with 0.08% T.H.D ) (Europe, U.K. & Australia & Asia)

(U.S.A., & Canada Models)

(U.S.A., & Canada Models)

(U.S.A., & Canada Models)

(U.S.A., & Canada Models)



 Video Section



Standard video jacks

Input/output level and impedance:
Frequency response: 5Hz~10MHz  +1, −3dB

1Vp-p,75Ω/ohms

S-video jacks

Input/output level and impedance:

Frequency response: 5Hz~10MHz:  +1, −3dB

Y(brightness)signal  1Vp-p, 75Ω/ohms
C(color)signal  0.286Vp-p, 75Ω/ohms

Color component video jacks (U.S.A. & Canada Models)

Input/output level and impedance:

Frequency response: 5Hz~27MHz:  +0, −3dB



 Tuner section



Receiving range: [FM] (note: µV at 75Ω/ohms, 0dBf =1×10

U.S.A., & Canada Models:
Europe U.K. & Australia Models:
Asia Model:

Usable sensitivity: 1.0µV (11.2dBf) 18µV
50 dB quieting sensitivity: MONO 1.6µV (15.3dBf)

S/N ratio: MONO 80dB (IHF-A weighted)

T otal harmonic distortion: MONO 0.15% (1kHz)

Y(brightness)signal  1Vp-p, 75Ω/ohms
P

B/CB(blue)signal  0.7Vp-p, 75Ω/ohms

PR/CR(red)signal  0.7Vp-p, 75Ω/ohms

87.50MHz~107.90MHz 520kHz~1710kHz

87.50MHz~108.00MHz 522kHz~1611kHz

87.50MHz~107.90MHz (0.2MHz steps) 520kHz~1710kHz (10kHz steps)

87.50MHz~108.00MHz (0.05MHz steps) 522kHz~1611kHz (9kHz steps)

STEREO 23µV (38.5dBf)

STEREO 75dB (IHF-A weighted)

STEREO 0.3% (1kHz)

-15

W) [AM]

2



 General



Power supply: AC120V, 60Hz (U.S.A. & Canada Models)

AC230V, 50Hz (Europe, U.K. & Australia Models)
AC115/230V, 50/60Hz (Asia Model)

Power consumption: 4.0A (USA & Canada model)

Maximum external dimensions: 434 (W) × 147 (H) × 417 (D) mm (17-3/32″ × 5-25/32″ × 1-23/64″)
Mass: 10.4kg (22 lbs 14.9 oz)



 Remote control unit (RC-920)



Batteries: R6P/AA T ype (two batteries)
External dimensions: 55 (W) × 225 (H) × 34.5 (D) mm (2-11/64″ × 8-55/64″ × 1-9/64″)
Mass: 165g (Approx. 5.8 oz) (including batteries)

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

210W (Europe, U.K., Australia & Asia models)

AVR-1603/683

3

DISASSEMBLY

(Follow the procedure below in the reverse order when reassembling)

1. Top Cover

Remove 6 screws 1 and 3 screws 2, then detach the
Top Cover to the arrow direction.

AVR-1603/683

Top Cover

2. Front Panel

(1) Remove 4 screws 3 and 3 screws 4.
(2) Disconnect 3 connectors and FFC coming from the

Front Panel side.

(3) Disconnect the connector coming from the Trans., and

detach the Front Panel to the arrow direction.

1

1

Connector

4

4

2

Front Panel

3. Rear Panel

(1) Take off the AC cord 5 .
(2) Remove 32 screws 6 (36 pieces for U.S.A. & Canada models).
(3) Detach the Rear Panel to the arrow direction.

FFC

4

Connector

3

5

Rear Panel

6

6

6

(U.S.A. & Canada models)

6

6

4

LEVEL DIAGRAMS

AVR-1603/683

1

FRONT/CENTER/SURROUND

2

3

4

5

76

8

A

B

C

D

E

5

AVR-1603/683

1

SUB WOOFER

2

3

4

5

76

8

A

B

C

D

E

6

BLOCK DIAGRAM

AVR-1603/683

1

2

3

4

5

76

8

A

B

C

D

E

7

ADJUSTMENT

Tuner Section

CONNECTION DIAGRAM OF MEASURING INSTRUMENTS



 FM



T402T403

R471

IC402

AVR-1603/683

STEREO
MODULATOR

VR402

TUNER B'D

FM ALIGNMENT

Alignment

Step



 AM



Item

Center

1

Adjustment
2 Distortion
3 Repeat Steps 1 and 2
4 Signal Level

Tuning

Frequency

Setting

98.1MHz

(98.0MHz)

98.1MHz

(98.0MHz)

98.1MHz

(98.0MHz)

Type Frequency

FM SSG 98.1MHz 60dBµ

FM SSG 98.1MHz 60dBµ

FM SSG 98.1MHz 20dBµ OFF

Input Output Adjustment

Input
Level

Modulation Coupling Type Connect to Points Adjust to

Mono

1kHz 100%

Mono

1kHz 100%

75ohm

Antenna
Terminal

Antenna
Terminal

Antenna
Terminal

FM SSG

Digital
Voltmeter

Digital

Voltmeter
Distortion

Meter

Light “TUNED” on

Terminal (L)

FL Display

R471 T402 ± 50mV

Output

T403

VR402

Minimum

Distortion

+14

20

−10

dB

AM ALIGNMENT

Step

1 Signal Level

Alignment

Item

Frequency Input
999 (1000)

kHz

AM SSG

T402T403

R471

IC402

VR401

TUNER B’D

Output Adjustment

Type Connect to Points Adjust to



VR401

Light “TUNED” on

FL Display

Remarks

SSG OUTPUT

74dBµ (EMF)

8

AVR-1603/683

Audio Section

Idling Current

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, VR103, VR104, VR105 on 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).

(3) Connect power cord to AC Line, and turn power switch "ON".
(4) Presetting. MASTER VOLUME : "---" counterclockwise (

MODE : 5CH STEREO
FUNCTION : CD

(5) Within 2 minutes after the power on, turn VR101 clockwise (

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.

min.)

) to adjust the TEST POINT voltage to 1.5 mV ±0.5 mV

9

SEMICONDUCTORS

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

PA7NCV

DDVSS

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

31323334353637383940414243444546474849

50

100

99989796959493929190898887868584838281

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



 IC’s



CXP740096
(IC201)

AVR-1603/683

CXP740096 Terminal Function

Pin
No.

1 3811K1MUTE O BD3811K1 CONTROL
2 3811K1CLK O BD3811K1 CONTROL
3 3811K1DATA O BD3811K1 CONTROL
4 CDR/TAPE O CDR/TAPE INHIBIT
5 VCR O VCR INHIBIT
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 SDOUT O CONTROL DATA
19 89057 SCLK O CONTROL CLOCK
20 1837 RESET O CODEC RESET
21 NC 
22 SW MUTE O SW MUTE
23 RELAY F-B O FRONT B RELAY

Pin Name FunctionI/O

10

AVR-1603/683

Pin
No.

Pin Name FunctionI/O

24 RELAY F-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 
32 CNT MUTE O CENTER MUTE
33 FRONT MUTE O FRONT MUTE
34 SURR MUTE O SURROUND MUTE
35 NC 
36 NC 
37 NC 
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 AVSS 
53 VREF 
54 AVDD 
55 NC 
56 GND 
57 STEP OPT I AREA SELECT
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 89057 INT I LC89057 INTERUPT
66 M32 SCLK O MELODY32 CLOCK
67 1837 CE O CODEC CE
68 M32 RESET O MELODY32 RESET
69 NC 
70 NC 
71 NC 
72 NC 
73 NC 
74 NC 
75 NC 
76 NC 

11

AVR-1603/683

Pin
No.

Pin Name FunctionI/O

77 PWR DOWN I POWER DOWN DETECT
78 RDS CLK O TDA7330 CONTROL CLOCK
79 RDS DATA O TDA7330 CONTROL DATA
80 NC 
81 VIDEO MUTE O VIDEO MUTE
82 M32 INTREQ I/O MELODY32 CONTROL
83 VIDEO SEL1 O VIDEO SELECT1
84 VIDEO SEL2 O VIDEO SELECT2
85 REMOCON I REMOTE CONTROL SIGNAL INPUT
86 GND 
87 GND 
88 VSS 
89 VDD 
90 NC 
91 NC 
92 PLL DATA O PLL CONTROL
93 PLL CLK O PLL CONTROL
94 PLL DT IN O PLL CONTROL
95 TU MUTE O TUNER MUTE
96 STEREO I STEREO DETECT
97 TUNED I TUNED DETECT
98 PLL CE O PLL CONTROL
99 NC 

100 NC 

12

MELODY32 (IC802)

AVR-1603/683

MELODY32 Terminal Function

Pin

Pin Name

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 VDDEXT
14 HAD9
15 HAD10
16 GND
17 HAD11
18 HAD12
19 VDDINT
20 HAD13
21 HAD14
22 HAD15
23 HA16
24 HACK_P

Pin

Pin Name

No.

25 VDDEXT
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 VDDEXT
41 PF6
42 PF7
43 TMR0
44 TMR1
45 TMR2
46 DT2
47 TCLK2
48 TFS2

144

1

36

37

Pin

Pin Name

No.

49 DR2
50 RCLK2
51 RFS2
52 RXD
53 TXD
54 GND
55 GND
56 DT0
57 TCLK0
58 VDDINT
59 TF50
60 DR0
61 RCLK0
62 RFS0
63 VDDEXT
64 DT1
65 TCLK1
66 TFS1
67 DR1
68 RCLK1
69 RFS1
70 BMODE0
71 BMODE1
72 BYPASS

TOP VIEW

Pin

No.

73 RESET
74 TDO
75 TDI
76 TMS
77 GND
78 TCK
79 TRST
80 GND
81 EMU
82 VDDINT
83 OPMODE
84 A0
85 A1
86 A2
87 A3
88 A4
89 A5
90 VDDEXT
91 A6
92 A7
93 A8
94 GND
95 A9
96 A10

Pin Name

109

108

73

72

Pin
No.

97 A11
98 A12

99 A13
100 VDDEXT
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 VDDEXT
119 MS3
120 ACK

Pin Name

Pin
No.

Pin Name

121 WR
122 RD
123 D0
124 D1
125 D2
126 D3
127 VDDINT
128 D4
129 GND
130 CLKOUT
131 VDDEXT
132 CLKIN
133 XTAL
134 GND
135 D5
136 D6
137 D7
138 D8
139 D9
140 D10
141 D11
142 D12
143 VDDEXT
144 D13

13

AD1837 (IC808)

DVDD

CLATCH

CIN

PD/RST

AGND

NC

OUTL1

NC

OUTR1

AGND

AVDD

NC

OUTL2

DGND

CCLK

COUT

ASDATA

ODVDD

MCLK

ALRCLK

ABCLK

ADCLP

ADCLN

DSDATA4

ADCRN

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

TOP VIEW

FILTD

FILTR

AGND

AVDD

DSDATA3

DSDATA2

AGND

ADCRP

DGND

DSDATA1

NC

OUTL3

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

AVR-1603/683

DVDD
DBCLK
DLRCLK
M/S
AGND
OUTR4
NC
OUTL4
NC
AGND
AVDD
OUTR3
NC

MCLKASDATAABCLKALRCLKODVDDDVDD DVDD

PD/RST M/S AVDD AVDD

CLOCK

DIGITAL
FILTER

DIGITAL
FILTER

DIGITAL
FILTER

DIGITAL
FILTER

DescriptionPin No.

V

Σ-∆

DAC

Σ-∆

DAC

Σ-∆

DAC

Σ-∆

DAC

REF

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

Σ-∆

ADC

Σ-∆

ADC

AD1837

Input/

Output

SERIAL DATA

I/O PORT

DIGITAL
FILTER

DIGITAL
FILTER

CINCLATCHCCLK COUT

CONTROL PORT

VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME

DGND AGND AGND AGND AGNDDGND

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

14

LC89057W (IC807)

AVR-1603/683

RXOUT

RX0
RX1
RX2
RX3
RX4

RX5/VI

RX6/UI

LPF

TMCK/PIO0
TBCK/PIO1

TLRCK/PIO2

TDATA/PIO3

TXO/PIOEN

1

2
3
4
5
8
9

10

13

44
45
46
47

48

EMPHA/UO33AUDIO/VO35INT40CL39CE38DI

32

Clock

Selector

27

Microcontroller

Input

Selector

Modulation

or

Parallel Port

XIN

29

C bit, U bit

Demodulation

&

Lock Detect

PLL

28

XOUT

XMCK34CKST

I/F

Data

Selector

I/N

XMODE
41

37

36

21

24

16
17

20
22
23

DO

RERR

RDATA

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 I5 TTL compatible digital data input terminal
3 RX1 I Coaxial compatible amp built-in digital data input terminal
4 RX2 I5 TTL compatible digital data input terminal
5 RX3 I5 TTL compatible digital data input terminal
6 DGND — Digital GND
7 DVDD — Digital power
8 RX4 I5 TTL compatible digital data input terminal
9 RX5/VI I5 TTL compatible digital data/Validity flag input terminal for modulation
10 RX6/UI I5 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 I5 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

15

AVR-1603/683

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 I5 µcom I/F, write data input terminal
39 CE I5 µcom I/F, chip enable input terminal
40 CL I5 µcom I/F, clock input terminal
41 XMODE I5 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.

LC72131 (IC401)

1

XIN

CE

2

3

DI

4

CL

DO

5

BO1

6

BO2

7

BO3

8

BO4

9

IO1

10

LA1266 (IC402)

AM-IF FM-IF FM-IN

11

13

18

AM-IN

20

RF MIX

21

REG

22

BUFFER

124

XOUT

20

Vss

19

AOUT

18

17

AIN

PD

16

VDD

15

FMIN

14

12 13

10

IF

IF

BUFFER

OSC

23

2

1

FM - IF

AM-IF DET

OSC

NARROW

BUFFER

S-METER

GND

24

4

3

5

6

7

Vcc

POST

Q.D.

AMP

AGC

S-METER

17

19

14

16

LED

DRIVER

12

9

15

8

LA3401 (IC403)

22

VOL
REG

SYMMETRICAL
REOCTANCE
CIRCUIT

MUTING

21

OSC

FF

AMIN

13

IO2

12

IFIN

11

FM AM CHANGE

20

PHASE
COMPARATOR

FF

Ro

19



FF

38kHz

DECODER

18

VCO STOP

38kHz 90°

Rc

Rc

16

17

PILOT DET

FF

FF

19kHz 90°

MUTING CONTROL
FM AM CHANGE OVER

Rb

Rb

15

Vcc ON
MUTING

14

13

LAMP
DRIVER

TRIGGER

STEREO
SWITCH

MUTING
OUTPUT

12

2

1

4

3

6

5

8

7

9

11

10

16

AVR-1603/683

M29W800AT (IC805)

M29W800T
M29W800T

48

37
36

25

1

A15 A16
A14 BYTE
A13 V
A12 DQ15A-1
A11 DQ7
A10 DQ14

A9 DQ6

A8 DQ13
NC DQ5
NC DQ12

W DQ4

12

RP V

13

NC DQ11
NC DQ3
RB DQ10

A18 DQ2
A17 DQ9

A7 DQ1

A6 DQ8

A5 DQ0

A4 G

A3 V

A2 E

A1 A0

24

IS61LV6416 (IC806)

1

A15

2

A14

3

A13

4

A12

5

A11

6

CE

7

I/O0

8

I/O1

9

I/O2

10

I/O3

11

Vcc

12

GND

13

I/O4

14

I/O5

15

I/O6

16

I/O7

17

WE

18

A10

19

A9

20

A8

21

A7

22

NC

V

SS

CC

A0-A18

19

15

DQ0-DQ14

W

E

M29W800AT

G

DQ15A-1

BYTE

RB

RP

SS

V

ss

A0

44

A1

43

A2

42

OE

41

UB

40

LB

39

I/O15

38

I/O14

37

I/O13

36

I/O12

35

GND

34

Vcc

33

I/O11

32

I/O10

31

I/O9

30

I/O8

29

NC

28

A3

27

A4

26

A5

25

A6

24

NC

23

A0-A15

VCC

GND

I/O0-I/O7

Lower Byte

I/O8-I/O15

Upper Byte

CE
OE

WE

UB

LB

DECODER

I/O

DATA

CIRCUIT

CONTROL

CIRCUIT

64K x 16

MEMORY ARRAY

COLUMN I/O

Symbol

A0-A18
DQ0-DQ7
DQ8-DQ14
DQ15A-1
E
G
W
RP

CC

SS

PIN DESCRIPTION

Symbol

A0-A15
I/O0-I/O15
CE
OE
WE
LB
UB

V

CC

Address Inputs
Data Input/Outputs, Command Inputs
Data Input/Outputs
Data Input/Output or Address Input
Chip Enable
Output Enable
Write Enable
Reset/Block Temporary Unprotect
Ready/Busy OutputRB
Byte/Word OrganizationBYTE

Supply VoltageV
GroundV
No Connected InternallyNC
Don’t Use as Internally ConnectedDU

Pin Name

Pin Name

Address inputs
Data Inputs/Outputs
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
GroundGND

CC

PIN DESCRIPTION

BD3811K1 (IC701)

IN61

INDVDSR

INDVDSL

INDVDC

INDVDSW

OUT2(+)

OUT2(-)

OUT1(+)

OUT1(-)

IN1DSP

IN1MIX

IN2DSP

IN2MIX

IN22

IN21

IN12

IN11

ROUT32

ROUT31

ROUT22

ROUT21

ROUT12

ROUT11

5.1ch Mode SW1

VINC

GOUTC

AGND10

OUTSW

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

IN31

1

IN32

2

IN41

3

IN42

4

IN51

5

IN52

6

7

IN62

8

IN71

9

IN72

10

IN81

IN82

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25 26

INDSPSR

5.1ch Mode SW2 DSP

INDSPSL

5.1ch Mode SW2 DVD

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

VINSW

INDSPC

INDSPSW

AGND1

GOUTSW

AGND2

GOUT2

OUTC

VIN2

OUTSL

TREBLE

LOGIC

AGND9

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

AVR-1603/683

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

74LCX74 (IC821)

1C

D1

CP

1

D

D

1

2

CP

1

3

S

D1

4

Q

1

5

Q

1

6

GND Q

7

SD1C

Q1Q

D

2

CD2S

Q2Q

1

D1

1

CP

2

D2

2

MM74LCX244 (IC809~811)

LC75721E Terminal Function



AA5/G15

AA4/G16

AA3

AA2

AA1

AM35

AM34

AM33

32

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

17

161

AM 9

AM 10

AM 11

AM 12

AM 13

AM 14

AM 15

AM 16

Symbol

V

DD

V

SS

V

FL

DI
CL
CE

OSCI
OSCO

RES
AM1~AM35

AA1~AA3
AA4/G16

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

G1~G11
TEST

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

Grid output terminal
LSI test terminal

Function

TOP VIEW

1

OE

2

I0

3

O4

4

I1

5

O5

6

I2

7

O6

8

I3

912

O7 O3

10 11

GND

20

VCC

19

OE2

18

O0

17

I4

16

O1

15

I5

14

O2

13

I6

I7

BU2090F (IC302)

1

Pin Descriptions

V

CC

14

C

D2

13

D

2

12
11

CP

2

10

SD

2

9

Q

2
2

8



Pin Names
D1, D
CP1, CP

1, CD2

CD

1, SD2

SD

1, Q1, Q2, Q2

Q

2

2

Data Inputs
Clock Pulse Inputs

Direct Clear Inputs
Direct Set Inputs
Outputs

Description

VSS

DATA

CLOCK

LCK

Q0
Q1
Q2

Q4

2
3

4
5
6
7
8
9

CONTROL CIRCUIT

12-bit SHIFT REGISTER

12-bit STRAGE REGISTER

OUTPUT BUFFER (OPEN DRAIN)

18

VDD
OE

17
16

Q11
Q10

15

Q9

14
13

Q8

12

Q7
Q6

11Q3

Q5

10

TDA7330BD (IC202)

MM74LCX02 (IC813)

TOP VIEW

MUXIN

V

REF

GND

OSCIN

1
2
3
4
5
6

T1

7

T3

8

T4

9

10

20

POR

19

TM

18

FSELCOMP

17

T2FILOUT

16

CC

V

15

ARI

14

QUAL

13

RDDA

12

RDCLOSCOUT

11

T57

GND

1

1Y
1A

2

1B

3

2Y

4

2A

5
6

2B

7

SN74LV00APW (IC814) 74HCU04 (IC803)

1

1A

1Y

2A

2Y

3A

3Y

GND

2

3

4

5

6

7

GND

1

1A

1B

2

1Y

3

2A

4

2B

5

6

2Y

7

Vcc

14

4B

13

4A

12

4Y

11

3B

10

9

3A

3Y

8

NJM2068MD
(IC815~820,721,761,762,
763,781,782,783,817,818,819)

14

Vcc

13

4Y
4B

12

4A

11

3Y

10

3B

9

3A

8

BA4510F (IC815,816)

A OUTPUT

A –INPUT

A+INPUT

1
2

3

V

4

V

8

B OUTPUT

7
6

B –INPUT
B +INPUT

5

LA7952 (IC601,621,622)

14

Vcc

13

6A

6Y

12

11

5A

5Y

10

4A

9

8

4Y

6dB
amp

driver

1

VIDEO OUT

control

234567

A

B

VIN1

video switch
(4 inout 1 output)

GND

VIN2

8

9

Vcc

VIN3

VIN4

18

BA7625 (IC651)
BA7626 (IC652,653)

Monitor OUT

GND

IN5

GND

IN4

CTL E

IN3

CTL D

AVR-1603/683

1
2

3
4
5

6

7

8

6dB

LOGIC

6dB

LOGIC

16
15
14
13

10

12
11

9

IN1
CTL A
V OUT1
Vcc
IN2
CTL B
V OUT2
CTL C

ABE

MONITOR OUT

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

LL* IN 1 LL*

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 IN 5 HHH IN 5 HHH IN 5

Note 1: * mark means that feasib le fo r e ither H o r L.
Note 2: Each input terminal is provided with sink chip clamp (BA7625).

Each input terminal takes 20kohm at the end (BA7626).

KIA7806AP (IC602)

KIA7915PI (IC102)
KIA7805AP (IC104,103,822)
KIA7815AP (IC101)
KIA7812AP (IC271)

FRONT

VIEW

Input

GND

Output

FRONT

VIEW

Input

GND

Output



LL* IN 1

RC1117S25T (IC824)
RC1117S33ST (IC823)

FRONT VIEW

3

IN

2

V

OUT

2

1

OUT
ADJ/GND



MM74HCT244 (IC812)

1G

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

GND

0
0
1
1
2
2
3
3

20 1
19 2
18 3
17 4
16 5
15 6

14 7
13 8
12 9
11 10

V

CC

2G

0

1Y

0

2A

1

1Y

1

2A

2

1Y

2

2A

3

1Y

3

2A

OPTICAL



INPUT

Vcc

Vout

GND

IR SENSOR



NJL64H380A(RMC301)

TOP VIEW

Vcc

Vout

GND

OUTPUT
GP1FA502TZ(IC817)

CC

V

OUT

V
GND

Head Amp Amp Limitter Comparator

PD

ABLC

B.P.F

Vin

Detector

IC PROTECTOR



ICP-N15 (IC105)GP1FA502RZ (IC801~803)

FRONT VIEW

CC

DRIVE

IC

LED

Vcc

GND

V
Vin
GND



POSISTOR

P43T7D330BW16

FRONT VIEW

22kohm

V

CC

V

OUT

GND

19

TRANSISTORS



DTA114ES
DTC114TS
DTC114YS
DTC144ES

FRONT

VIEW

C

B

E

DTA114EK
DTA114YK
DTA144EK
DTC114EK
DTC114YK
DTC144EK

B

TOP

C

VIEW

E

DTA Series

R1

B

DTA114EK
DTA114ES

DTA114YK
DTA144EK

10kohm
10kohm /Ω10kohm
10kohm
47kohm

R2

R1

E

Ω

/

/

Ω

/

Ω

C

10kohm

47kohm
47kohm

R2

AVR-1603/683

DTC Series

C

R1

B

R2

E

R1

Ω

/
/Ω

/

Ω

/

Ω

DTC114EK
DTC114TS
DTC114YK
DTC114YS
DTC144EK

DTC144ES

10kohm
10kohm

10kohm /Ω47kohm
10kohm /Ω47kohm
47kohm
47kohm

R2

Ω

10kohm

/

/

Ω

47kohm

/

Ω

47kohm

/

Ω

Ω

/

/Ω
/Ω

/

Ω

/

Ω

2SC1740S
2SC3199Y
KSA916Y
KSA992F
KSC1845F
KTA1266Y

FRONT

VIEW

KTA1268BL
KTC2874B

C

KTC3198Y

E

KTC3200BL

DIODES (LED included)



MTZJ5.1B
MTZJ6.8B
MTZJ7.5A
MTZJ8.2B
MTZJ11B
MTZJ18B
MTZJ20B

2SC2412K

2SK117

KTC3880S

B

TOP

C

VIEW

E

B

FRONT

VIEW

G

D

S

1N4007

2SD947F 2SD3290Y

2SB1560Y

E (Emitter)
C (Collector)
B (Base)

KDS160MTZJ3.3B

E (Emitter)
C (Collector)
B (Base)

1SS133

TOP VIEW

HL-50RDRF4T

TOP VIEW

KBPC604

TOP VIEW

20

FL DISPLAY



16-st-42GNK (FL301)

AVR-1603/683

1

TUNED

STEREO

RDS

CH

G16

TUNED

RDS

CH

G15 G13

STEREO

AUTO

Pin Assignment

AUTO

G14

MULTI

REC

MULTI

REC

PHONO

VCR

G12

PHONO

VCR

G11

CD

1

−

G10

CD

−

1

TUNER

−2−

3 V.AUX

G9

TUNER

3

−2−

G8

AUXMDDVD /

G7

AUX

V.AUX

VDP TV

TAPE

/

G6

DVD /

MD

G5

/

−1−

G4

VDP

TAPE

/

2

DBS

DIGITAL

G3

TV

−1−

PRO LOGIC
DIGITAL

ANALOG

G2

/ DBS

2

DIGITAL

58

F2F1

G1

PRO LOGIC
DIGITAL

ANALOG

S38

S1

S6

S11

S16

S21

S26

S31

S14

S13

S9

S10

S15
S11

S12

G2~G16

S3

S2

S7

S8

S13

S12

S18

S17

S23

S22

S28

S27

S33

S32

G1

S9

S14

S19

S24

S29

S34

S1

S6

S2

S7

S5

S3

S4

S4

S5

S10

S15

S20

S25

S30

S35

PIN NO.
CONNECTION

PIN NO.
CONNECTION

PIN NO.
CONNECTION

12345

F1 F1 S1 S2 S3
21 22

23 24 25

S19 S20 S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 S36 S37 S38

41 42 43 44 45

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 G16

DIGITAL

ANALOG

S38

/

−

DBS

S10
S11
S12
S13
S14

S15
S16
S17

S18

/(DVD)

/(MD)

6

S4

26

46

G1
S10
S11

S12

S13
S14
S15

DIGITAL

PRO LOGIC

DVD

MD

V.AUX

7 8 9 10111213141516171819

S5 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16 S17
27 28 29 30 31 32 33 34

47 48 49 50 51 52 53 54 55 56 57

35 36 37 38 39 40

58

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

G2~G16

S13
S14
S15
S16

S17
S18

AUX

S10
S11
S12

S19
S20
S21
S22
S23
S24
S25
S26

S27

TUNER

−

2

−

3

CD

−

G1

G2~G16

S19
S20
S21
S22
S23
S24

S25
S26

S28
S29
S30
S31
S32
S33
S34
S35

S27

PHONO

1

VCR

REC

MULTI

G1

STEREO

AUTO

G2~G16

S28
S29
S30
S31

S32
S33

S34
S35

TUNED

RDS

20

S18

CH

21

PRINTED WIRING BOARDS

AVR-1603/683

1

MAIN P.W.B. UNIT(for U.S.A., Canada, U.K., Europe, China, Korea & Australia models)

2

3

4

5

76

8

A

B

C

D

E

COMPONENT SIDE

22

AVR-1603/683

1

MAIN P.W.B. UNIT(for Asia, HongKong, & Taiwan R.O.C. models)

2

3

4

5

76

8

A

B

C

D

E

COMPONENT SIDE

23

AVR-1603/683

1

CPU P.W.B. UNIT

2

3

4

5

76

8

A

B

C

D

E

COMPONENT SIDE

24

AVR-1603/683

1

2

3

4

5

76

8

A

B

C

D

E

FOIL SIDE

25

AVR-1603/683

1

CNT P.W.B. UNIT

2

3

4

5

76

8

A

B

C

D

E

COMPONENT SIDE

26

AVR-1603/683

1

2

3

4

5

76

8

A

B

C

D

E

FOIL SIDE

27

AVR-1603/683

1

INPUT-VOL P.W.B. UNIT

2

3

4

5

76

8

A

B

C

D

E

COMPONENT SIDE FOIL SIDE

28

AVR-1603/683

1

DSP P.W.B. UNIT

2

3

4

5

76

8

A

B

COMPONENT SIDE

C

D

FOIL SIDE

E

29

AVR-1603/683

1

VOLTAGE SEL P.W.B. UNIT

32

4

A

B

COMPONENT SIDE

C

D

E

30