STR-DE635 - Sony Audio Service Manual (repair manual)

US Model

Canadian Model

AEP Model

— Continued on next page —

Manufactured under license from Dolby Laboratories
Licensing Corporation.
“DOLBY” and the double-D symbol 

a

 are trademarks

of Dolby Laboratories Licensing Corporation.

2006D16-1

© 2006.04

POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
With 8 

Ω

 loads, both channels driven, from 20 – 20,000 Hz; rated 80 W

per channel minimum RMS power, with no more than 0.09% toral
harmonic distortion from 250 mW to rated output (USA model only).

Stereo mode

USA, Canadian models:

(8

Ω

 20Hz – 20kHz, THD 0.09%)

80W + 80W

AEP model:

(4

Ω

 DIN, 1kHz)

70W + 70W

Surround mode

USA, Canadian models:

(8

Ω

 at 1kHz, THD 0.8%)

Front: 80W + 80W
Center

a)

: 80W

Rear

a)

: 80W + 80W

AEP model:

(4

Ω

 DIN, 1kHz)

Front: 70W + 70W
Center

a)

: 70W

Rear

a)

: 70W + 70W

a) Depending on the sound field settings and the source, there may be no

sound output.

Dynamic power output

145W + 145W, 8

Ω

210W + 210W, 4

Ω

Frequency response

PHONO: RIAA
equalization curve 

±

0.5 dB

USA, Canadian models:

CD, MD/TAPE, DVD/LD, TV/SAT,
VIDEO1,2:

AEP model:

CD, MD/TAPE, DVD, TV/LD, VIDEO1,2:
10Hz – 50kHz + 0.5/–2dB (with sound field,
equalizer, and bass boost bypassed)

Inputs (Analog)

PHONO:
Sensitivity: 2.5mV
Impedance: 50k

Ω

S/N

b)

: 86dB (A, 2.5mV

c)

)

USA, Canadian models:

5.1CH INPUT, CD,DVD/LD,MD/TAPE,TV/
SAT,VIDEO1,2:

AEP model

5.1CH INPUT, CD,DVD,MD/TAPE,TV/
LD,VIDEO1,2:
Sensitivity: 150mV
Impedance: 50k

Ω

S/N

b)

: 96dB (A, 150mV

c)

)

b) Input short
c) Weighted network, input level

— 2 —

Inputs (Digital)

DVD/LD (coaxial):
Sensitivity: –
Impedance: 75

Ω

S/N: 100dB (A, 20kHz LPF)
DVD/LD (Optical):
Sensitivity: –
Impedance: –
S/N: 100dB (A, 20kHz LPF)

Outputs

MD/TAPE, (REC OUT);
VIDEO1,2 (AUDIO OUT):
Voltage: 150mV,
Impedance: 10k

Ω

SUB WOOFER:
Voltage:2V
Impedance: 1k

Ω

PHONES:
Accepts low-and high-impedance headphones

BASS BOOST

+6dB at 70Hz

Sampling Frequency

48kHz

EQ

BASS: 100Hz – 1.0kHz (21steps)
MID: 500Hz – 5.0kHz (21steps)
TABLE: 1.0kHz – 10kHz (21steps)
Gain levels: ±10dB, 1dB step

Tuning range

87.5 – 108.0MHz

Antenna terminals

75

Ω

, unbalanced

Sensitivity

Mono: 18.3dBf, 2.2µV/75

Ω

Stereo: 38.3dBf, 22.5µV/75

Ω

Usable sensitivity

11.2dBf, 1µV/75

Ω

S/N

Mono: 76dB
Stereo: 70dB

Harmonic destortion at 1kHz

Mono: 0.3%
Stereo: 0.5%

Separetion

45dB at 1kHz

Frequency response

30Hz – 15kHz + 0.5/–2dB

Selectivity

60dB at 400kHz

Tuning range

USA, Canadian models:

With 10-kHz tuning scale:
530 – 1,710kHz

d)

With 9-kHz tuning scale:
531 – 1,710kHz

d)

AEP model

531 – 1,602kHz

Antenna

Loop antenna

Usable sensitivity

50dB/m (at 1,000kHz or 999kHz)

S/N

54dB (at 50mV/m)

Harmonic destortion

0.5% (50mV/m, 400kHz)

Selectivity

At 9kHz: 35dB
At 10kHz: 40dB

d) You can change the AM tuning scale to 9kHz. After tuning in any AM

station, turn off the receiver. Hold down the TUNING+ button and
press the 1/u button. All preset stations will be erased when you
change the tuning scale. To reset the scale to 10kHz, repeat the
procedure.

Inputs

1Vp-p 75

Ω

Outputs

1Vp-p 75

Ω

System

Tuner section:

PLL quartz-locked digital synthesizer system

Preamplifier section:

Low-noise NF type equalizer

Power amplifier section:

Pure-complementary SEPP

Power requirements USA, Canadian models:

120V AC, 60Hz

AEP model

230V AC, 50/60Hz

Power consumption

USA: 270W
Canada: 285VA
AEP: 200W

AC outlets

USA, Canadian models:

2switched, total 100W

AEP model

1switched, max 100W

Dimensions

430 

×

 364 

×

 157.5mm

(17 

×

 14

5

/

16

 

×

 6

1

/

4

 in.)

including projecting parts and controls

Mass (Approx.)

USA, Canadian models:

9.5kg (20 lbs. 15 oz.)

AEP model

10.1kg

Supplied accessories FM wire antenna (1)

AM loop antenna (1)
Remote commander RM-PP402 (remote) (1)
R6 (size-AA) batteries (2)
FM antenna adapter (1)

Design and specifications are subject to change without notice.

— 3 —

!

!

!

(US model only)

    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 AC leakage. Check leakage as
described below.

    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 microampers).
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)

Earth Ground

AC
voltmeter
(0.75V)

1.5k

Ω

0.15

µ

F

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

To Exposed Metal 
Parts on Set

·········································································· 4

······················································· 6

······································································ 6

4-1.

Block Diagram   Main Section ··········································· 7

4-2.

Block Diagram   Power Section ········································· 9

4-3.

Circuit Board Location ····················································· 11

4-4.

Schematic Diagram   Digital Section(1/3) ······················· 13

4-5.

Schematic Diagram   Digital Section(2/3) ······················· 15

4-6.

Schematic Diagram   Digital Section(3/3) ······················· 17

4-7.

Printed Wiring Board   Digital Section(1/2) ····················· 19

4-8.

Printed Wiring Board   Digital Section(2/2) ····················· 21

4-9.

Printed Wiring Board   Display Section ··························· 23

4-10. Schematic Diagram   Display Section ······························ 25
4-11. Printed Wiring Board   Surround Section ························· 27
4-12. Schematic Diagram   Surround Section ··························· 29
4-13. Printed Wiring Board   Rear AMP Section ······················· 31
4-14. Schematic Diagram   Rear AMP Section ························· 33
4-15. Printed Wiring Board   Power Section ····························· 35
4-16. Schematic Diagram   Power Section ································ 37
4-17. Printed Wiring Board   Video Section ······························ 39
4-18. Schematic Diagram   Video Section ································· 41
4-19. Printed Wiring Board   Main Section ······························· 43
4-20. Schematic Diagram   Main Section(1/2) ·························· 45
4-21. Schematic Diagram   Main Section(2/2) ·························· 47
4-22. IC Pin Function ································································ 49
4-23. IC Block Diagrams ··························································· 59

5-1.

Front Panel Section ·························································· 62

5-2.

Chassis Section ································································· 63

······································· 64

— 4 —

1

1

/

u

 switch

2

Function buttons

3

INPUT MODE button

4

5.1CH INPUT button

5

MASTER VOLUME control

6

MUTING button

7

SPEAKERS selector
PHONES jack

8

DISPLAY button

9

DIMMER button

0

A.F.D button/indicator
MODE button/indicator
2CH button/indicator

!¡

MULTI CHANNEL DECODING indicator

!™

BASS BOOST button

!£

EQUALIZER button

!¢

DIRECT button
SHIFT button
Numeric buttons (0 to 9)
AM button (US, Canadian models)
RDS EON button (US, Canadian models)
FM button (US, Canadian models)
AM/FM button (AEP model)
FM MODE button
MEMORY button

!∞

TUNNIG +/- buttons
PRESET +/- buttons

!§

LEVEL button

!¶

SUR button

!•

EQ button

!ª

Cursor buttons(</>)

@º

Jog dial

@¡

SET UP button

@™

NAME button

@£

ENTER button

@¢

RDS PTY button (AEP model)