Sony STRDE-185 Service manual

STR-DE185

SERVICE MANUAL

Ver 1.1 2003. 11

SPECIFICATIONS

AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOT AL

HARMONIC DISTORTION:

With 8 ohm loads, both channels driven, from
40 – 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 (Models of area code
US only).

Amplifier section

POWER OUTPUT

Models of area code US
Rated Power Output at Stereo Mode
(8 ohms 40 Hz – 20 kHz, THD 0.09 %)

Models of area code AEP, UK
Rated Power Output at Stereo Mode

8 ohms 1 kHz, THD 0.7 %)

(

1) Measured under the following conditions:
Area code Power requirements

AEP, UK 230 V AC, 50 Hz

100 W + 100 W

100 W + 100 W

1)

US Model

AEP Model

UK Model

Outputs
MD/TAPE, VIDEO 1 Voltage: 250 mV

Impedance: 10 kilohms

Bass Boost: +8 dB at 70 Hz
Tone: ±10 dB at 100 Hz and

10 kHz

FM tuner section

Tuning range 87.5 – 108.0 MHz
Antenna terminals 75 ohms, unbalanced
Intermediate frequency 10.7 MHz
Sensitivity

Mono: 18.3 dBf, 2.2 µV/75 ohms

Stereo: 38.3 dBf, 22.5 µV/75 ohms
Usable sensitivity 11.2 dBf, 1 µV/75 ohms
S/N

Mono: 76 dB

Stereo: 70 dB
Harmonic distortion at 1 kHz

Mono: 0.5%

Stereo: 0.8%
Separation 35 dB at 1 kHz
Frequency response 30 Hz – 15 kHz,

+0.5/–2 dB

Selectivity 60 dB at 400 kHz

Frequency response
CD, MD/TAPE, 20 Hz – 50 kHz

VIDEO 1, VIDEO 2 +0/–0.5 dB (with bass

Inputs (Analog)
CD, MD/TAPE, Sensitivity: 250 mV

VIDEO 1, VIDEO 2 Impedance: 50 kilohms

2) INPUT SHORT.

3) Weighted network, input level.

9-873-586-02

2003K04-1
© 2003.11

boost bypassed)

2)

S/N

: 85 dB

(A, 250 mV

3)

)

Sony Corporation

Home Audio Company
Published by Sony Engineering Corporation

– Continued on next page –

FM STEREO/FM-AM RECEIVER

1

STR-DE185

AM tuner section

Tuning range

Models of area code US
With 10-kHz tuning scale: 530 – 1710 kHz
With 9-kHz tuning scale: 531 – 1710 kHz

Models of area code AEP, UK
With 9-kHz tuning scale: 531 – 1602 kHz

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

999 kHz)
S/N 45 dB (at 50 mV/m)
Harmonic distortion 1.0 % (50 mV/m,

400 Hz)
Selectivity
At 9 kHz: 35 dB
At 10 kHz: 40 dB

4) You can change the AM tuning scale to 9 kHz or

10 kHz. After tuning in any AM station, turn off
the receiver. Hold down PRESET TUNING + and
press ?/1. All preset stations will be erased when
you change the tuning scale. To reset the scale to
10 kHz (or 9 kHz), repeat the procedure.

4)

4)

General

Power requirements

Area code Power consumption
US 120 V AC, 60 Hz
AEP, UK 230 V AC, 50/60 Hz

Power consumption

Area code Power consumption
US 190 W
AEP, UK 210 W

Power consumption (during standby mode)

0.5 W (for models of all area code)

AC outlets

Area code AC outlets
US 1 switched, 120 W/1A MAX
AEP, UK 1 switched, 100 W MAX

Dimensions 430 × 145 × 300 mm

Mass (Approx.) 7.0 kg (15 lb 7 oz)
Supplied accessories

FM wire antenna (1)
AM loop antenna (1)
Remote commander RM-U185 (1)
R6 (size-AA) batteries (2)

Design and specifications are subject to change without
notice.

(16 7/8 × 5 6/8 × 11 6/8 in.)

including projecting parts

and controls

MODEL IDENTIFICATION

— BACK PANEL —

Part No.

MODEL PART No.

US 4-238-277-0s
AEP 4-238-277-1s
UK 4-238-277-2s

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.

2

STR-DE185

SAFETY CHECK-OUT

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

LEAKAGE TEST

The AC leakage from any exposed 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. Follow 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 voltmeter. The “limit” indication is 0.75
V, so analog meters must have an accurate low-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)

To Exposed Metal
Parts on Set

TABLE OF CONTENTS

1. GENERAL

Main unit ................................................................................. 4

Remote button description ....................................................... 5

2. DISASSEMBLY

2-1. Case ..................................................................................... 6

2-2. Front Panel Section ............................................................. 7

2-3. Back Panel ........................................................................... 7

2-4. Main Board ......................................................................... 8

3. TEST MODE ........................................................................ 9

4. DIAGRAMS

4-1. IC Pin Description ............................................................. 10

4-2. Circuit Boards Location .................................................... 11

4-3. Block Diagram – Main Section – ...................................... 12

4-4. Block Diagram – Power Section – .................................... 13

4-5. Printed Wiring Board – Main Section – ............................ 14

4-6. Printed Wiring Boards – H/P, Outlet Section – ................. 15

4-7. Schematic Diagram – Main Section (1/2) – ...................... 16

4-8. Schematic Diagram – Main Section (2/2) – ...................... 17

4-9. Schematic Diagram – Display Section – ........................... 18

4-10. Printed Wiring Board – Display Section – ........................ 19

4-11. Printed Wiring Board – Power SW Section – ................... 20

5. EXPLODED VIEWS

5-1. Case Section ...................................................................... 21

5-2. Front Panel Section ........................................................... 22

5-3. Chassis Section ................................................................. 23

6. ELECTRICAL PARTS LIST......................................... 24

0.15 µF

1.5 k

Ω

Earth Ground

AC
voltmeter
(0.75 V)

Fig. A. Using an AC voltmeter to check AC leakage.

3

STR-DE185

SECTION 1

GENERAL

List of Button Locations and Reference Pages

This section is extracted
from instruction manual.

How to use this page

Use this page to find the location of buttons that are
mentioned in the text.

Main unit

ALPHABETICAL ORDER

A – H

AM 8 (13, 14)
BALANCE L/R q; (12)
BASS +/– wa (12)
BASS BOOST ql (12)
CD qg (8, 12)
DIRECT wg (13)
DISPLAY qa (12, 16)
Display 9 (11-16, 18, 19)
FM 6 (13, 14)
FM MODE wd (14)

I – O

IR (receptor) 2 (4, 22)

1 2 3 456 7 8 9q; qa qsqd qf qgqh

MASTER VOLUME qj (12, 20)
MD/TAPE qf (8, 12)
MEMORY/ENTER wf (13, 15,

18)

MUTING qk (12, 20)
NAME 5 (18)
Numeric buttons 3 (13)

P – S

PHONES wl (12, 21)
PRESET/PTY SELECT +/–

(models of area code CEL,
CEK) 7 (15, 16)

PRESET TUNING +/– (models of

area code U) 7 (15, 23)

PTY (models of area code CEL,

CEK) 4

(16)

Illustration number

r

List of Button

NAME 5 (18)

Name of button/part Reference page

RR

Locations and

SHIFT wh (15)
SLEEP (models of area code U)

4 (19)
SPEAKERS A wj (10, 12)
SPEAKERS B wk (10, 12)

Reference Pages

T – Z

TREBLE +/– w; (12)
TUNER qh (8, 12-15, 18)
TUNING/CHAR +/– ws (14, 18)
VIDEO 1 qs (12)
VIDEO 2 qd (8, 12)

BUTTON DESCRIPTIONS

?/1 (power) 1 (11, 13, 23)

wl

qjqkqlw;wawswdwfwgwhwjwk

GB

5

4

Remote button description

STR-DE185

You can use the remote RM-U185 to operate
the components in your system.

SYSTEM

STANDBY

VIDEO 2

CD

F

ENTER

f

?/1

DVD

TUNER

•

g

O

SLEEPAV?/1

VIDEO 1

MD/TAPE

TOP MENU DVD MENU

123

G

456

78 9

0

+

>

M

X

+

+

++

TV CH

––

D. TUNING

ENTER

RETURN

TV/VIDEO

ANT

TV/VTR

D.SKIP

x

BASS BOOST

MUTING

MASTER

VOL

SHIFT

>10

– /– –

–

CH/PRESET

.

m

N

L BALANCE R

–

TREBLE

–

BASS

TV VOL

The tables below show the settings of each
button.

Remote Operations Function
Button

SLEEP Receiver Activates the sleep

?/1 Receiver Turns the receiver on or

VIDEO 1 Receiver To watch VCR.

VIDEO 2 Receiver To watch VCR.

DVD Receiver To watch DVD.

MD/TAPE

Receiver To listen to Minidisc or

CD Receiver To listen to compact disc.

TUNER Receiver To listen to radio

SHIFT Receiver Press repeatedly to select

D.TUNING

BALANCE

Receiver Tuner station direct

Receiver Adjust the balance.

L/R

BASS Receiver Reinforce the bass.
BOOST

TREBLE Receiver Adjust the treble tone
+/– quality.

MUTING Receiver Mutes the sound from the

BASS +/– Receiver Adjust the bass tone

function and the duration
which the receiver turns
off automatically.

off.

(VTR mode 3)

(VTR mode 1)

audio tape.

programs.

a memory page for
presetting radio stations
or tuning to preset
stations.

key-in-mode.

receiver.

quality.

24

Note

When you press the function buttons (VIDEO 1,
VIDEO 2, DVD), the input mode of the TV might not
switch to the corresponding input mode that you

want. In this case, press the TV/VIDEO button to

switch the input mode of the TV.

GB

5

STR-DE185

e

SECTION 2

DISASSEMBLY

Note : This set can be disassemble according to the following sequence.

SET

2-1. CASE

(Page 6)

2-2. FRONT PANEL SECTION

(Page 7)

Note : Follow the disassembly procedure in the numerical order given.

2-3. BACK PANEL

(Page 7)

2-1. CASE

1

two screws
(case 3 TP2)

2-4. MAIN BOARD

(Page 8)

2

two screws
(case 3 TP2)

4

cas

3

two screws
(case 3 TP2)

6

2-2. FRONT PANEL SECTION

3

CNP801

4

two screws
(BVTP3 x 8)

2

STR-DE185

CN5

6

front panel section

2-3. BACK PANEL

3

CNP907

2

CNP901

5

9

back panel (DE1)

8

1

CN4

four screws
(BVTP3 x 8)

screw

(BVTP3 x 8)

4

three screws
(BVTP3 x 8)

5

two screws
(BVTP3 x 8)

6

two screws
(BVTP3 x 8)

1

CN3

7

screw

(BVTP3 x 8)

7

STR-DE185

2-4. MAIN BOARD

two screws

3

(BVTP3 x 8)

6

screw
(BVTP3 x 8)

2

CNP905

1

CNP904

4

two screws
(BVTP3 x 8)

5

screw
(BVTP3 x 8)

8

MAIN board

7

8

SECTION 3

f

TEST MODE

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:

1. While pressing the five function buttons of [VIDEO 1], [VIDEO 2],

[MD/TAPE], [CD] and [TUNER] simultaneously, press the ?/1

button to turn the power ON.

2. The FL tube will illuminate in half light on. The following dis­play will be repeated whenever the five function buttons are
pressed.

• Operation of function buttons

all light on half light on 1 half light on 2 all light of

3. Press any button other than the function buttons to release the
check mode.

AUTO-BETICAL Check Mode (AEP, UK models)

To auto-scanning and memories of RDS station.

Procedure:

1. While pressing the [MEMORY/ENTER] button, press the
button to turn the power ON.

2. The message “AUTO-BETICAL SELECT” are scrolled.

?/1

STR-DE185

AM Tuning Interval Selection Mode (US model)

Either 9 kHz step or 10 kHz step can be selected for the AM tuning
interval.

Procedure:

1. While pressing the [TUNING/CHAR +] button, press the ?/1
button to turn the power ON.

2. Either the message “9k STEP” or “10k STEP” appears.

3. Select the desired step.

Software Version Display Mode

The software version is displayed.

Procedure:

1. While pressing the two buttons of [SPEAKERS B] and [VIDEO 1]
simultaneously, press the ?/1 button to turn the power ON.

2. The software version is displayed.

ex.) US model : U
AEP, UK model : CE *.

*.**

**

Shift version
Area

9

STR-DE185

SECTION 4

DIAGRAMS

4-1. IC PIN DESCRIPTION

• IC201 µPD78044FGF-200-3B9 (SYSTEM CONTROLLER, FL DRIVER)

Pin No. Pin Name I/O Pin Description

1 to 7 DIG7 to 1 O Digit drive signal output to the fluorescent indicator tube (FL201).

8 +5V — Power supply pin (+5 V)

9 CL O Serial clock signal output to FM/AM tuner pack.

10 DO O Serial data signal output to FM/AM tuner pack.

11 DI I Serial data signal input from FM/AM tuner pack.

12 CE O Serial chip enable signal output to FM/AM tuner pack.

13 VOL DATA O Serial data signal output to sound control IC.

14 VOL CE O Serial clock signal output to sound control IC.

15 RDS DATA I RDS data signal input from FM/AM tuner pack. (AEP, UK model only)

16 PROTECTOR I Overload detection signal input

17 RESET I Reset signal input

18 TUNED I TUNED indicator detection signal input from FM/AM tuner pack.

19 STEREO I STEREO indicator detection signal input from FM/AM tuner pack.

20 AVSS — Analog ground

21 VERSION I Destination select signal input (Fixed at H: US model, L: AEP, UK model)

22 FM SIGNAL OUT I

23 to 28 AD6 to 1 I Function keys signal input

29 AVDD — A/D converter power supply pin (+5 V)

30 AVREF — A/D converter reference voltage input (+5 V)

31 NC — Not used. (Connect to AVREF pin in this set)

32 OPEN — Not used. (Open)

33 GND — Ground

34 X1 I Master clock input (4.19 MHz)

35 X2 O Master clock output (4.19 MHz)

36 REC SW1 O VIDEO 1 ON/OFF signal output

37 REC SW2 O MD/TAPE ON/OFF signal output

38, 39 VOL A, B I Master volume JOG data input A, B

40 FUNC.MUTE O Not used. (Fixed at L in this set)

41 CK O Serial clock signal output to electoric volume IC.

42 DATA O Serial data signal output to electoric volume IC.

43 STB O Serial data strobe signal output to electoric volume IC.

44 SYS.POWER I System power signal input

45 AC MUTE O A-Class mute signal output

46 RDS INT I RDS clock signal input from FM/AM tuner pack. (AEP, UK model only)

47 STOP I Stop signal input from reset signal generator IC.

48 VSS — Ground

49 SIRCS I Sircs signal input from remote control receiver IC.

50 TUNER MUTE O Muting control signal output to FM/AM tuner pack.

51 NC — Not used. (Open)

52 +5V — Power supply pin (+5 V)

53 BASS B. LED O BASS BOOST LED drive signal output

54 SPK A LED O SPEAKERS A LED drive signal output

55 SPK B LED O SPEAKERS B LED drive signal output

FM/AM signal meter voltage detection signal input from FM/AM tuner pack.

(AEP, UK model only)

10

STR-DE185

Pin No. Pin Name I/O Pin Description

56 RY R1 COIL O Power relay (12V) drive signal output

57 RY POWER O AC power relay (9V) drive signal output

58 RY A O Speakers A relay (12V) drive signal output

59 RY B O Speakers B relay (12V) drive signal output

60 RY HP O Phones relay (12V) drive signal output

61 NC — Not used. (Open)

62 to 70 S15 to 7 O Segment drive signal output to the fluorescent indicator tube (FL201).

71 VLOAD — Power supply pin (-24 V)

72 to 77 S6 to 1 O Segment drive signal output to the fluorescent indicator tube (FL201).

78 to 80 DIG10 to 8 O Digit drive signal output to the fluorescent indicator tube (FL201).

4-2. CIRCUIT BOARDS LOCATION

OUTLET board

POWER SW board

MAIN board

HP board

DISPLAY board

11 11

STR-DE185

4-3. BLOCK DIAGRAM — MAIN SECTION —

TM301

ANTENNA

FM 75Ω

COAXIAL

AM

FM/AM TUNER UNIT

STEREO

FM SIGNAL

RDS DATA

RDS INT

AEP,UK
MODEL

10V

L CH

R CH

TUNED

MUTE

OUT

3.3V

+10V

R CH

STEREO

TUNED

MUTE

+10V

CE

DI

DO

CL

CE

DI

DO

CL

FM SG OUT

RDS DATA

RDS INT

+3.3V

3

1

REG

IC904

VIDEO,MD/TAPE

SOUND CONTROL

IC401

TUNER
L

9

J801 (1/2)

-1
L

INCD

-2

R

-5
L

INMD/TAPE

-6

R

J802 (1/2)

-1
L

AUDIO INVIDEO 2

-2

R

-5
L

AUDIO INVIDEO 1

-6

R

R-CH

R-CH

R-CH

R-CH

CD L

7

MD L

5

VIDEO 2

3

VIDEO 1

1

REC L

VOL L

TREBLE

L

MIDDLE

L

BASS

L

OUT L

CONTROL

CLK

32 3 1 1 2

29

20 3 2

DATA

AUDIO AMP

IC403

ELECTRONIC

VOLUME

IC402

L
IN

VOLUME

CONTROL

CLK

DATA

8 9 1015 14

STB

L
OUT

SELECT

IC404

4 3

13 5

Q474

INV.

Q424

INV.

R-CH

R-CH

J801 (2/2)

J802 (2/2)

-3
L

-4

R

-3
L

-4

R

OUT

AUDIO OUT

ST-L

ST-RR-CH

MD/TAPE

VIDEO 1

LED

DRIVER

Q206

D203
BASS

BOOST

BASS B.LED

DI

CE

CL

DO

MUTE

TUNED

STEREO

RDS INT

RDS DATA

FM SG OUT

15 46 19 18 50 12 10 11 9 13 37 36

TUNED

STEREO

RDS INT

RDS DATA

FM SIGNAL OUT

VOL A

VOL B

3853 39

1 3

RV201

MASTER VOLUME

DI

CE

DO

TUNER MUTE

X1

X2

35

X201

4.19MHz

CL

SIRCS

49 71 2877 - 72,70 - 62 7 - 1,80 - 78 27 26 25 24 44 23 54 1734

1

REMOTE
CONTROL
RECEIVER

IC202

I

VLOAD

-24V F1 F2

DIG1

DIG10

FLUORESCENT

INDICATOR

FL201

TUBE

1422

VOL CL

VOL DATA

SYSTEM CONTROLLER,

FL DRIVER

IC201

I

S1

S15

AD1

AD2

KEY MATRIX

S204-239

AD3

AD4

AD5

41 42 43

CK

STB

DATA

SYS.POWER

AD6

S201 S202 S203

I

/

I

AB

SPEAKERS

SPK A LED

LED

DRIVER

Q204

D205 D206

AB

SPEAKERS

REC SW2

55

LED

DRIVER

Q205

REC SW1

SPK B LED

AC MUTE

RY HP

RY A
RY B

PROTECTOR

RY R1 COIL

RY POWER

STOP

RESET

45
60
58
59
16
56
57

47

RESET

SWITCH

Q201,202

1

AC MUTE
HP RELAY
SPK A RELAY
SPK B RELAY
PROTECTOR SIG
R1 COIL RELAY
POWER RELAY

STOP SIGNAL

• Signal path
: FM/AM
: MD/TAPE
: VIDEO 1
: CD
: VIDEO 2

• R-ch is omitted due to
same as L-ch.

POWER

SECTION

(Page 13)

1212