Sony STR-DE245/DE345, STR-DE245, STR-DE345 Service Manual

STR-DE245/DE345

AEP Model

UK Model

E Model

Australian Model

STR-DE245/DE345

US Model

Canadian Model

Chinese Model

PX Model

STR-DE345

SERVICE MANUAL

FM STEREO FM-AM RECEIVER

SPECIFICATIONS

Manufactured under license from Dolby Laboratories Licensing
Corporation.
“DOLBY” the double-D symbol ; “AC-3” and “Pro Logic” are
trademarks of Dolby Laboratories Licensing Corporation.

Photo: STR-DE345

— Continued on next page —

POWER OUTPUT AND TOTAL HARMONIC
DISTORTION
With 8-ohm load, both channels driven, from 20 –
20,000 Hz rated 100 watts per channel minimum
RMS power, with no more than 0.09% total
harmonic distortion from 250 milliwatts to rated
output.

Amplifier section

Rated Power Output at (8 Ω at 20 Hz – 20 kHz,
Stereo Mode THD 0.09 %)

100W + 100W

Reference Power Output (8Ω at 1 kHz, THD 0.7%)

Front: 100 W + 100 W
Center: 100 W
Rear: 100 W + 100 W

Frequency response TV/SAT, CD, MD/TAPE,

VIDEO, 5.1CH/DVD
10 – 50 kHz dB

Inputs

Sensitivity Impedance S/N

CD,

5.1CH/
DVD,
MD/TAPE, 150 mV

50

85 dB

TV/SAT,

kilohms

VIDEO

Outputs MD/TAPE REC OUT:

Voltage: 150 mV,
Impedance: 10 kilohms
VIDEO AUDIO OUT:
Voltage: 150 mV,
Impedance: 10 kilohms
SUB WOOFER:
Voltage: 2 V
Impedance: 1 kilohms
PHONES: Accepts low
and high impedance
headphones

Muting Full mute
BASS BOOST +6 dB at 70 Hz
TONE ±6 dB at 100 Hz and

10 kHz

Tuner section

FM Stereo, FM/AM superheterodyne tuner

FM tuner section

Tuning range 87.5 – 108.0 MHz
Antenna terminals 75 Ω, unbalanced
Intermediate frequency 10.7 MHz
Sensitivity Mono: 18.3 dBf, 4.5 µV

Stereo: 38.3 dBf, 45 µV
Usable sensitivity 11.2 dBf, 2 µV (IHF)
S/N Mono: 76 dB

Stereo: 70 dB
Harmonic Mono: 0.3 %
distortion at 1 kHz Stereo: 0.5 %
Separation 45 dB at 1 kHz
Frequency response 30 Hz –15 kHz dB
Selectivity 60 dB at 400 kHz

+0.5
–2.0

+0.5
–2.0

AM tuner section

Tuning range 10 kHz interval*

530 – 1,710 kHz
9 kHz interval

531 – 1,710 kHz
Antenna Loop antenna
Intermediate frequency 450 kHz
Usable sensitivity 50 dB/m (at 1,000 kHz

or 999 kHz)
S/N 54 dB (at 50 mV/m)
Harmonic distortion 0.5 % (50 mV/m, 400

Hz)
Selectivity At 10 kHz: 40 dB

At 9 kHz: 35 dB

* You can change the AM tuning interval between 9

kHz and 10 kHz. Turn off the receiver and press
the ?/1 (power) for more than 4 seconds until
“INITIAL” appears.

1) After turning in any AM station, turn off the
receiver.

2) Hold down PRESET TUNING + button and
press the ?/1 (power) button .
“9 k STEP” appears.

To change to 10 k Step, repeat step 1 and 2
until “10 k STEP” appears. Note that all preset
stations, index names and sound field are
cleared after you make the procedure above.

Ver 1.0 2000. 02

2

VIDEO section

Inputs VIDEO, TV/SAT, 5.1CH/DVD:

1 Vp-p 75 Ω

Outputs VIDEO, MONITOR:

1 Vp-p 75 Ω

General

System Tuner section: PLL

quartz-locked digital
synthesizer system
Preamplifier section:
Low-noise NF type
equalizer
Power amplifier section:
Pure-complementary

SEPP
Power requirements 120 V AC, 60 Hz
Power consumption 235 W
Dimensions 17 × 56/8 × 12 inches)

(430 × 145 × 304 mm)
Mass (Aporox.) 7.3 kg (16 lb 2 oz)
Supplid accessories FM wire antenna (1)

AM loop antenna (1)

Remote commander (remote) (1)

Size AA (R6) batteries (2)

Operating Instructions of the remote RM-PP404

Design and specifications are subject to change without notice.

MODEL IDENTIFICATION

— BACK PANEL —

Parts No.

MODEL PARTS No.

DE345: US model 4-226-462-0s
DE345: Canadian model 4-226-462-1s
DE345: Australian model 4-226-462-2s
DE345: Singapore, Malaysia model 4-226-462-3s
DE345: Chinese model 4-226-462-4s
DE345: E, Saudi Arabia, PX model 4-226-462-5s
DE345: AEP model 4-226-462-6s
DE345: Russian, East European model 4-226-462-7s
DE345: Mexican model 4-226-462-8s
DE345: Argentine model 4-226-462-9s
DE245: Australian model 4-226-468-2s
DE245: Singapore, Malaysia model 4-226-468-3s
DE245: E, Saudi Arabia model 4-226-468-4s
DE245: AEP, UK model 4-226-468-5s
DE245: Mexican, Russian,

East European model

4-226-468-6s

3

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH
MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY .

After correcting the original service problem, perform the
following safety checks before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, screws,
and all other exposed metal parts for A C leakage. Check leakage as
described below.

LEAKAGE

The A C leakage from any e xposed metal part to earth ground and
from all exposed metal parts to any exposed metal part having a
return to chassis, must not exceed 0.5 mA (500 microamperes).
Leakage current can be measured by any one of three methods.

1. A commercial leakage tester, such as the Simpson 229 or RCA
WT -540A. Follo w the manufacturers’ instructions to use these
instruments.

2. A battery-operated AC milliammeter. The Data Precision 245
digital multimeter is suitable for this job.

3. Measuring the voltage drop across a resistor by means of a
VOM or battery-operated AC v oltmeter. The “limit” indication
is 0.75 V, so analog meters must ha v e an accurate lo w-voltage
scale. The Simpson 250 and Sanwa SH-63Trd are examples of
a passive VOM that is suitable. Nearly all battery operated
digital multimeters that have a 2V AC range are suitable. (See
Fig. A)

SAFETY CHECK-OUT

T o Exposed Metal

Parts on Set

0.15

µ

F

1.5 k

Ω

AC
Voltmeter
(0.75 V)

Earth Ground

Fig. A. Using an A C v oltmeter to check A C leakage.

ATTENTION AU COMPOSANT AYANT RAPPORT

À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS P AR UNE MARQUE 0 SUR LES
DIAGRAMMES SCHÉMA TIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

TABLE OF CONTENTS

1. GENERAL ·········································································· 4

2. TEST MODE······································································ 6

3. DIAGRAMS

3-1. Block Diagram ······························································ 7
3-2. IC Block Diagrams ························································ 8
3-3. IC Pin Function Description ·········································· 8
3-4. Circuit Boards Location ················································ 9
3-5. Printed Wiring Board Main Section ·························· 10
3-6. Schematic Diagram Main Section (1/3) ···················· 11
3-7. Schematic Diagram Main Section (2/3) ···················· 12
3-8. Schematic Diagram Main Section (3/3) ···················· 13
3-9. Printed Wiring Board Panel Section·························· 14
3-10.Schematic Diagram Panel Section ··························· 15
3-11.Printed Wiring Board Power Section ························ 16
3-12.Schematic Diagram Power Section ·························· 17
3-13.Printed Wiring Board Video Section ························· 18
3-14.Schematic Diagram Video Section ··························· 18

4. EXPLODED VIEWS

4-1. Front Panel Section ····················································· 19
4-2. Chassis Section ···························································· 20

5. ELECTRICAL PARTS LIST······································· 21

4

SECTION 1

GENERAL

Front Panel

1

qs

4

5

6

7

8

9

qa

2

3

0

1 I/1 (POWER) button
2 SPEAKERS ON/OFF SWITCH button
3 PHONE jack
4 VIDEO button

TV/SAT button

5.1CH/DVD button
MD/TAPE button
CD button
TUNER button

5 SOUND FIELD ON/OFF,

MODE + , – buttons
BASS + , – buttons
TREBLE + , – buttons

6 MENU < , > , + , – buttons
7 MASTER VOLUME control

8 MUTING button

BASS BOOST botton

9 PRESET/PTY SELECT + , – buttons

TUNING + , – buttons
FM/AM button
FM MODE button
SHIFT button
MEMORY button

0 SET UP button

NAME button
ENTER button

qa SOUND CONTROL LEVEL,SUR buttons
qs DIMMER button

DISPLAY button

5

Rear Panel

This section is extracted
from instruction manual.

6

SECTION 2

TEST MODE

SOFTWARE VERSION DISPLAY MODE

* The software version is displayed.
* Procedure:

While depressing the TUNER and the VIDEO buttons
simultaneously, press the po wer [?/1] button to turn on the main
power . The model name, destination and the software version are
displayed.

FLUORESCENT INDICATOR TUBE TEST MODE

* All fluorescent segments are tested. When this test is activated,

all segments turn on at the same time, then each segment turns on
one after another.

* Procedure:

While depressing the TV/SA T and the CD buttons simultaneously ,
press the power [?/1] button to turn on the main power.

1. All segments turn on.

SET UP, SOUND FIELD, BASS BOOST and MUTING LED
turn on.

2. Press the VIDEO button, confirm display

BASS BOOST, MUTING, SET UP and NAME LED turn on.

3. Press the VIDEO button, confirm display

SOUND CONTROL LEVEL, SOUND CONTROL SUR and
SOUND FIELD LED turn on.

4. Press the VIDEO button, All segments turn off.

5. Every pressing of the VIDEO b utton turns on each segment one
after another in the following order.
(Not only the VIDEO button, b ut also the other b uttons such as
TV/SAT, MD/TAPE, CD, TUNER can be used.)

FACTORY SET MODE

* All preset contents are reset to the default setting.
* Procedure:

While depressing the VIDEO and the CD buttons simultaneously ,
press the power [?/1] button to turn on the main power. The
message FACTOR Y appears and the present contents are reset to
the default values.

ALL CLEAR MODE

* All preset contents are cleared when this mode is activated. Use

this mode before returning the product to clients upon completion
of repair.

* Procedure:

While depressing the TUNER and the MD/TAPE buttons
simultaneously, press the po wer [?/1] button to turn on the main
power. The message INITIAL appears and initialization is
performed.

SURROUND CLEAR MODE

* The preset sound field is cleared when this mode is activated.

Use this mode before returning the product to clients upon
completion of repair.

* Procedure:

While depressing the SOUND FIELD ON/OFF button, press the
power [?/1] button to turn on the main power. The message
SURR CLR appears and initialization is performed.

AM CHANNEL STEP 9 kHz/10 kHz
SELECTION MODE

* Either the 9 kHz step or 10 kHz step can be selected for the AM

channel step.

* Procedure:

Set the FUNCTION to AM. Turn off the main power.
While depressing the TUNING+ button or the PRESET+ button,
press the power [?/1] button to turn on the main power. Either
the message AM 9 k STEP or AM 10 k STEP appear s. Select the
desired step.

* For US/Canadian/E model only

KEY CHECK MODE

* Button check
* Procedure:

While depressing the MD/TAPE and the CD buttons
simultaneously, press the po wer [?/1] button to turn on the main
power .
“RES 36 KEY” appears.
Every pressing of any button other than [?/1] and SPEAKERS
counts down the buttons. The b uttons which are already counted
once are not counted again. When all buttons are pressed “RES
00 KEY” appears.
When MASTER VOLUME is rotated in clockwise direction,
“VOL MIN”, “VOL 1” to “VOL 30”, “VOL MAX” appear.

77

SECTION 3
DIAGRAMS

3-1. BLOCK DIAGRAM

TUNER UNIT

RESET

Q201,202

Q659

: VIDEO

• Signal Path

• RCH is omitted

: FM

: CD

FM

AM

R-CH

S DATA

PLL DATA

S CLK

S CE

SIGNAL

STEREO

AUTO STOP

T MUTE

S DATA

DATA OUT

S CLK

SLAT

SIGNAL

STEREO

TUNED

T MUTE

FM

AM DET OUT

R OUT

L OUT

MD/

TAPE

CD

OUTPUT

INPUT

OUTPUT

INPUT

VIDEO

5.1

CH/DVD

FRONT

REAR

CENTER

WOOFER

J501

J401

LT IN

61

FC L IN

34

FC SL IN

32

FC C IN

62

DATA

52

DOLBY

SURROUND PROCESSOR

IC202

16L OUT

CLK

53

ENABLE

51

2

18SL OUT

10C OUT

DATA

CLK

4

14

16

13

X1

4.33MHz

RDS
IC1

AEP,UK,Russian,
East European MODEL

AUDIO SELECT

IC201

IN F2

66

IN A2

71

REC OUT 2A

61

IN B2

70

IN G2

63

SW CH N IN

27

D OUT2

59

49

L OUT

REC OUT 2B

61

43SL OUT

37

C OUT

28

SW CH OUT

MUTE
Q361

SEL OUT2

60

T IN2

58

SL CH N IN

44

DATA

32

CLOCK

31

LATCH

33

SL CH D IN

45

C CH N IN

38

C CH D IN

39

DATA

CLOCK

S CE

MUTE
Q362

MUTE
Q363

MUTE
Q364

IN1

6

2

+V OUT1

POWER AMP

IC701

5

NF1

LIMITER

Q701

3

-V OUT1

LIMITER

Q702

BOOSTER

Q703

BOOSTER

Q704

CURRENT

DETECT

Q705,706

OVER LOAD

DETECT

Q708,709

IN2

8

12

+V OUT2

9NF2

LIMITER

Q651

11

-V OUT1

LIMITER

Q652

BOOSTER

Q653

BOOSTER

Q654

CURRENT

DETECT

Q655,656

IN+

1

6

+V OUT

POWER AMP

IC501

2

IN-

LIMITER

Q501

5-V OUT

LIMITER

Q502

BOOSTER

Q503

BOOSTER

Q504

CURRENT

DETECT

Q505,506

OVER LOAD

DETECT

Q507,509

OVER LOAD

DETECT

Q657,658

Q707

D706

D606

D506

D721

PROTECT

SWITCH

Q722,723,725

RELAY
DRIVE

Q791

RY791

RELAY
DRIVE

Q730

RY710

D731

RELAY
DRIVE

Q610

RY610

D735

RELAY
DRIVE

Q550

RY510

D734

IC401

3

1

RELAY
DRIVE

Q470

RY470

D736

L

R

SR

SL

C

R-CH

R-CH

R-CH

SPEAKERS

FRONT

PHONES

SPEAKERS

REAR

SPEAKERS

CENTER

TM601

TM602

SUB

WOOFER

J403

5.1CH

(VIDEO IN)

TV/LD

5.1 IN

J281

IN

OUT

OUT

J282

VIDEO1

MONITOR

DE345 MODEL

V3

12

V1

1

OUT

5

V2

3

M OUT

10

13S1

2S2

4S2

11

M

VIDEO SELECT

IC281

21

AUTO STOP

S1

2

S2

3

IC MUTE

4

22

T MUTE

23

STEREO IN

28

SIGNAL

24

PLL DATA

19

S DATA

18

S CLK

20

S CE

38

RDS CLK

15

RDS DATA

8

S CLK

9

S CE

17

S CE

7

S DATA

59

FUNC MUTE

47

PROTECT

AUTO STOP

T MUTE

STEREO

SIGNAL

PLL DATA

S DATA

S CLK

S CE

CLOCK

S CE

DATA

54

H/P RY

53

FRONT RY

51

REAR RY

52

CTR RY

55

WOOFER RY

100 9133 30

A/D1 A/D4

FUNCTION

KEY

S206-235

S236,237

CE MODEL ONLY

LED DRIVE

Q126

MUTING LED

45

S FIELD LED68B.B LED

69

SURR LED66LEVEL LED

65

NAME LED

64

SETUP LED

63

LED DRIVE
Q210-215

D216

MUTING

D210-215

SYSTEM CONTROL

IC103

RV201

ENCODER

2 3

ENCODER50ENCODER49SYS POWER

56

SP SW

61

SYSTEM
POWER

S200SPS201

ON

OFF

90 80 78 75

.

DIG1-10 S1-S15

FLUORESCENT

INDICATOR TUBE

F1 F2

FL201

10

RESET

39

STOP

26

SIRCS

REMOTE
CONTROL
RECEIVER

2

1

IC203

POWER

CONTROL

IC950

5

8

3

6

+5.6V REG

Q951

D201

D202

D910-913

AC
IN

T972

RY901

D915D914

RELAY
DRIVE

Q470

D820-823

46

VDD

34

VDD

16

VDD

1VDD

-7V
REG

3 2

+7V
REG

3 1

+5V
REG

3 1

+5V
REG

3 1

+9V
REG

3 1

DOLBY SURR

+9V

DISPLAY

+5V(A)

AUDIO

+7V

AUDIO

-7V

TUNER,RDS

AUDIO
+5V(B)

IC805

IC803

IC804

IC807

IC802

POWER RY

48

RELAY

+B

+12V

REG

3 1

POWER AMP

+12V

IC801

-24V REG
Q801

FL201

-24V

-B SW
Q715

POWER AMP

-B

D824

D802

T901

POWER AMP

+B

240V

220V

120V

0V

VOLTAGE

SELECTOR

E,Saudi Arabia,PX MODEL

S901

12 11

X1

X2

X201

5.00MHz

16

F1

F2

88

3-2. IC BLOCK DIAGRAMS

IC281 NJM2279 (VIDEO BOARD)

VIN3

V-

14

SW213VIN112MUTE111VOUT110NC9V+

8

1

SW1

2

AMP

VIN2

3

MUTE2

4

VOUT2

5

GND26GND1

7

AMP

IC701, IC702 uPC2581V (MAIN BOARD)

PROTECTOR

DRIVE

1

2

3 456 7 8 9 10 11 12 13 14 15

PRE

DRIVE

PRE

DRIVE

BIAS CIRCUIT

REG

MUTE

+VOUT1

–VOUT1

COMP1

NF1

IN1

GND

IN2

NF2

COMP2

–VOUT2

+VOUT2

VCC1

VCC2

VEE

DRIVE

IC501 STK350-230 (MAIN BOARD)

1

2

3

4

5

6

7

8

9

TR3 R1

R2

TR4

TR6

TR7

R4

R9

TR5

TR1

TR2

R6

D4 D3

R7

R8

TR8

D1 D2

R5

R3

INPUT

NF

-VEOUT

+VEOUT

V

SS

GND

V

CC

SUB

IC1 BU1924 (MAIN BAORD)

1 2 3 4 5 6 7 8

910111213141516

QUAL

RDATA

VREF

VDD1

VSS1

MUX

VSS3

CMP

RCLK

XOXI(NC)

VDD2

VSS2

T1

T2

8TH SWITCHED

CAPACITOR

FILTER

PLL 57KHz

RDS/ARI

BIPHASE
DECODER

DEFFERENTIAL

DECODER

PLL

1187.5Hz

TEST

CLOCK

IC950 NJM2103 (POWER BOARD)

1

2

3

4

5

6

7

8

V+

VSB/SESIN

VSA

RESET

GND

OUTC

VSC

CR

VREF

+

–

–

+

–+–

+

Q

R S

3-3. IC PIN FUNCTION DESCRIPTION

IC103 µPD780205GF (DISPLAY BOARD)

Pin No.

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
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50

I/O

I
O
O
O
—
—
O
O
O

I
—
—
—
—

I
—
O
O
O
O

I
O

I

I
—

I
—

I

I

I

I

I

I
—
—
—
—

I

I
—
—
—
—
—
O
—

I
O

I

I

Description

Power supply to µ-com
Control Video IC switching
Control Video IC switching
Control mute of Video IC

Volume IC data
Volume IC clock
Volume IC enable
Read µ-com reset signal

For µ-com clock
Programming pow. supply
No use
Read decoded RDS data
Power supply to µ-com
Chip enable for ICs
Output clock signal
Output data signal
Chip enable for ICs
Tuner has tuned to a freq.
Mute tuner during scanning
Tuned freq. has stereo
Input tuner freq. data
Analog ground
Read remote comm. signal

Detect RDS signal level
Read version setting
Read key push signal
Read key push signal
Read key push signal
Read key push signal
Analog Power Supply
Analog reference ground

Read decoded RDS clock
Read signal when AC off
µ-com ground

Control mute LED
Power supply to µ-com
Detect Protector Status
Control Power relay
Read volume encoder changing
Read volume encoder changing

Pin Name

VDD +5V

S1
S2

IC.MUTE

P34
P33

S.DATA (M61501FP)

S.CLK (M61501FP)

S.CE (M61501FP)

RESET

X2
X1

VSS

—

RDS.DATA.IN

VDD +5V

S.CE (LV1050M)
S.CLK(DOLBY.TUNER)
S.DA TA(DOLBY.TUNER)

S.CE (TUNER)

AUTO-STOP

T.MUTE

STEREO-IN

PLL.DATA

AVSS

SIRCS

P16

SIGNAL

VERSION

A/D IV
A/D III

A/D II

A/D I

AVDD +5.0V

AVREF

P03
P02

RDS.CLK.IN

STOP
VSS

P74
P73
P72
P71

MUTING LED

VDD +5.0V

PROTECT

POWER-RY

ENCODER
ENCODER

99

For schematic diagrams.
Note:

• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.

• All resistors are in Ω and 1/

4

W or less unless otherwise

specified.

• % : indicates tolerance.

• f : internal component.

• 2 : nonflammable resistor.

• 1 : fusible resistor.

• C : panel designation.

• U : B+ Line.

• V : B– Line.

• H : adjustment for repair.

• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
No mark : FM

• Voltages are taken with a VOM (Input impedance 10 M Ω).
Voltage variations may be noted due to normal production
tolerances.

• Waveforms are taken with a oscilloscope.

• Circled numbers refer to waveforms.

• Signal path.

F : FM
J : CD
g : VIDEO
I : PHONO

• Abbreviation
CND : Canadian model.
AUS : Australian model.
SP : Singapore model.
MY : Malaysia model.
AR : Argentine model.
CH : Chinese model.
MX : Mexican model.
CIS : Russian model.
EA : Saudi Arabia model.
EE : East European model.

THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)

Note:

The components identified by
mark ! or dotted line with mark
! are critical for safety.
Replace only with part number
specified.

Note:

Les composants identifiés par
une marque ! sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro spécifié.

• Waveform
– MAIN SECTION –

– PANEL SECTION –

For printed wiring boards.
Note:

• X : parts extracted from the component side.

• a : Through hole.

• f : internal component.

• b : Pattern from the side which enables seeing.

C

B

These are omitted.

E

Q

B

These are omitted.

CE

3-4. CIRCUIT BOARDS LOCATION

Pin No.

51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69

70
71 – 74
75 – 78

79
80 – 84
85 – 90

91 – 100

Pin Name

REAR-RY

CTR-RY

FRONT-RY

H/P-RY

WOOFER RY

SYS.POWER

P115
P114

FUNC.MUTE

P112

SP SW

P110
SET UP LED
NAME LED
LEVEL LED

SURR LED

P103

S.FIELD LED

B.B. LED

P100

P97 – P94
S15 – S12

VLOAD
S11 – S7

S6 – S1

DIG10 – DIG1

Description

Control rear relay on/off
Control center relay
Control speaker relay
Control Headphone relay
Control Woofer relay
Detect power switch key

Control muting circuit

Read speaker switch comdition

Control Setup LED
Control Name LED
Control LEVEL LED
Control SURR LED

Control SF LED
Control Bass Boost LED

Output signal to FL tube
Negative power supply

Output signal to FL tube
Output signal to FL tube

I/O

O
O
O
O
O

I
—
—
O
—

I
—
O
O
O
O
—
O
O
—
—
O

I
—
O
O

STANDBY board

POWER SWITCH board

HEADPHONE board

DISPLAY board

ENCODER board

TUNING board

MAIN boar

d

VIDEO board

SECONDARY board

PRIMARY board

VOL-SEL board

1

IC1 qf

2.2Vp-p

230ns

2

IC103 qa

5.0Vp-p

200ns

STR-DE245/DE345

1010

3-5. PRINTED WIRING BOARD MAIN SECTION

• Refer to page 9 for Circuit Boards Location.

12

A

B

C

D

E

F

345678910

(Page 16)

(Page 14)

(Page 16)

(Page 18)

(Page 14)

CIS, EE

CIS, EE

C706

C606

C764

C714

Ref. No. LocationRef. No. Location

• Semiconductor Location

D470 B-6
D505 D-3
D506 D-4
D508 D-3
D510 B-8
D605 D-6
D606 C-6
D607 D-6
D608 D-6
D610 B-7
D627 D-9
D706 D-5
D710 B-8
D721 C-9
D722 B-8
D725 D-8
D726 D-8
D727 D-4
D728 D-4
D731 B-8
D732 B-8
D734 B-8
D735 B-7
D736 B-6

D757 D-7
D791 D-9
D801 C-10
D802 B-10
D804 C-10
D820 C-9
D821 C-10
D822 C-10
D823 C-9
D824 B-9
D825 B-10

IC1 B-2
IC201 B-4
IC202 C-3
IC401 B-5
IC501 C-4
IC701 C-6
IC702 C-7
IC801 C-8
IC802 C-9
IC803 C-9
IC804 C-9
IC805 A-2

IC807 B-6

Q361 B-5
Q362 B-6
Q363 B-6
Q364 B-7
Q365 C-6
Q366 C-6
Q470 B-6
Q501 D-2
Q502 E-3
Q503 E-3
Q504 E-3
Q505 D-2
Q506 D-2
Q507 D-3
Q509 D-3
Q550 B-7
Q601 D-8
Q602 E-8
Q603 E-8
Q604 E-9
Q605 D-9
Q606 D-8

Q610 B-7
Q651 D-5
Q652 E-6
Q653 E-5
Q654 E-6
Q655 D-5
Q656 D-6
Q657 D-6
Q658 D-6
Q659 D-6
Q701 D-4
Q702 E-4
Q703 E-4
Q704 E-5
Q705 D-5
Q706 D-4
Q707 D-5
Q708 D-5
Q709 D-5
Q715 C-8
Q722 B-9
Q723 C-8
Q725 B-8
Q730 B-8

Q751 D-7
Q752 E-7
Q753 E-7
Q754 E-7
Q755 D-7
Q756 D-7
Q757 D-7
Q758 D-7
Q759 D-8
Q791 D-9
Q801 D-9

IC3505 G-11
IC3506 I-10
IC3507 I-11
IC3508 H-10
IC3509 H-11
IC3510 J-10
IC3511 J-11
IC3512 J-10
IC3513 J-11
IC3514 I-11
IC3515 J-11
IC3516 I-12

IC3517 J-12
Q3301 G-3
Q3302 G-3
Q3303 G-4
Q3304 G-3
Q3305 G-3
Q3306 H-3
Q3307 G-6
Q3308 B-11
Q3309 H-5
Q3310 D-12
Q3311 H-5
Q3312 D-12
Q3313 H-5
Q3314 D-12
Q3315 G-5
Q3401 G-8
Q3402 H-8
Q3403 H-7
Q3404 H-7
Q3405 H-7
Q3406 G-6
Q3407 D-4
Q3501 H-12

Q3502 H-12
Q3503 H-12
Q3504 G-12
Q3505 G-12
Q3506 G-12
Q3511 G-11
Q3512 H-11
Q3513 G-11
Q3514 G-11
Q3515 I-11
Q3516 I-11
Q3517 H-11
Q3518 H-11
Q3519 J-11
Q3520 J-11
Q3521 J-11
Q3522 J-11

Ref. No. Location Ref. No. Location Ref. No. Location Ref. No. Location Ref. No. Location