STR-DA1ES, STR-DB780 - Sony Audio Service Manual (repair manual)

Photo: STR-DA1ES

2002F0500-1

C

 2002.06

US Model

Canadian Model

STR-DA1ES

AEP Model

UK Model

E Model

Chinese Model

STR-DB780

– Continued on next page –

This receiver incorporates Dolby* Digital and Pro
Logic Surround and the DTS** Digital Surround
System.
* Manufactured under license from Dolby

Laboratories.
“Dolby”, “Pro Logic” and the double-D symbol are
trademarks of Dolby Laboratories.

** “DTS” and “DTS Digital Surround” are registered

trademarks of Digital Theater Systems, Inc.

1) Depending on the sound field settings and the

source, there may be no sound output.

2) Measured under the following conditions:

SP, CEL, CEK

230 V AC, 50 Hz

TW

110 V AC, 60 Hz

3) Measured under the following conditions:

CN, KR

220 V AC, 50 Hz

PHONO

CD/SACD, MD/
TAPE, TV/SAT,
DVD/LD, VIDEO 1, 2,
3

PHONO

MULTI CH IN, CD/
SACD, MD/TAPE,
DVD/LD, TV/SAT,
VIDEO 1, 2, 3

4) INPUT SHORT.
5) Weighted network, input level.

ASSIGNABLE
COAXIAL IN (DVD/
LD CD/SACD)

DVD/LD, TV/SAT,
MD/TAPE (Optical)

RIAA equalization curve
±0.5 dB

10 Hz – 100 kHz
+0.5/–2 dB (with sound
field and equalizer
bypassed)

Sensitivity: 2.5 mV
Impedance: 50 kilohms
S/N

4)

: 86 dB (A, 2.5 mV

5)

)

Sensitivity: 150 mV
Impedance: 50 kilohms
S/N

4)

: 100 dB

(A, 150 mV

5)

)

With 8 ohm loads, both channels driven, from
20 – 20,000 Hz; rated 100 watts per channel
minimum RMS power, with no more than
0.05 % total harmonic distortion from
250 milliwatts to rated output.

(8 ohms 20 Hz – 20 kHz, THD 0.09 %)

100 W + 100 W

(4 ohms 20 Hz – 20 kHz, THD 0.09 %)

80 W + 80 W

(8 ohms 20 Hz – 20 kHz, THD 0.09 %)

FRONT

1)

:100 W + 100 W

CENTER

1)

: 100 W

SURR

1)

: 100 W + 100 W

(4 ohms 20 Hz – 20 kHz, THD 0.09 %)

FRONT:

1) 

80 W + 80 W

CENTER

1)

: 80 W

SURR

1)

: 80 W + 80 W

(8 ohms 1 kHz, THD 0.7 %)

100 W + 100 W

2)

90 W + 90 W

3)

(4 ohms 1 kHz, THD 0.7 %)

90 W + 90 W

2)

80 W + 80 W

3)

Impedance: 75 ohms
S/N: 100 dB
(A, 20 kHz LPF)

S/N: 100 dB
(A, 20 kHz LPF)

(8 ohms 1 kHz, THD 0.7 %)

FRONT

1)

: 100 W + 100 W

CENTER

1)

: 100 W

SURR

1)

: 100 W + 100 W

(4 ohms 1 kHz, THD 0.7 %)

FRONT

1)

: 80 W + 80 W

CENTER

1)

: 80 W

SURR

1)

: 80 W + 80 W

(8 ohms 20 Hz – 20 kHz, THD 0.09 %)

FRONT

1)

: 90 W + 90 W

CENTER

1)

: 90 W

SURR

1)

: 90 W + 90 W

(4 ohms 20 Hz – 20 kHz, THD 0.09 %)

FRONT

1)

: 75 W + 75 W

CENTER

1)

: 75 W

SURR

1)

: 75 W + 75 W

2

MD/TAPE (REC
OUT), VIDEO 1, 2
(AUDIO OUT)

FRONT L/R,
CENTER,
SURROUND L/R,
SUB WOOFER
(Models of area code
U, CA only)

SUB WOOFER
(Models of other area
codes)

BASS:

99 Hz~1.0 kHz
(21 steps)

TREBLE:

1.0 kHz~10 kHz
(23 steps)

Gain levels:

±10 dB, 0.5 dB step

87.5 - 108.0 MHz

75 ohms, unbalanced

Mono:

18.3 dBf, 2.2 

µV/75 ohms

Stereo:

38.3 dBf, 22.5 

µV/75 ohms

11.2 dBf, 1 

µV/75 ohms

Mono:

76 dB

Stereo:

70 dB

Mono:

0.3%

Stereo:

0.5%

45 dB at 1 kHz

30 Hz – 15 kHz,
+0.5/–2 dB

60 dB at 400 kHz

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

6)

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

6)

With 9-kHz tuning scale: 531 – 1,602 kHz

Loop antenna

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

54 dB (at 50 mV/m)

0.5 % (50 mV/m,
400 Hz)

At 9 kHz:

35 dB

At 10 kHz:

40 dB

6) 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 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.

Video:

1 Vp-p, 75 ohms

S-video:

Y: 1 Vp-p, 75 ohms
C: 0.286 Vp-p, 75 ohms

COMPONENT VIDEO
(Except for models of area code CEL, CEK):

Y: 1 Vp-p, 75 ohms
B-Y: 0.7 Vp-p, 75 ohms
R-Y: 0.7 Vp-p, 75 ohms

Voltage: 150 mV
Impedance: 10 kilohms

Voltage: 2 V
Impedance: 1 kilohms

Voltage: 2 V
Impedance: 1 kilohms

U, CA

120 V AC, 60 Hz

CEL, CEK

230 V AC, 50/60 Hz

CN, SP, KR

220 – 230 V AC, 50/60 Hz

TW

110 V AC, 60 Hz

U

280 W

CA

330 VA

CEL, CEK

290 W

CN, SP, KR

290 W

TW

290 W (MAX 500W)

0.5 W

U, CA

1 switched, 120 W/1A MAX

SP, TW

1 switched, 100 W MAX

430 

× 161 × 400 mm

including projecting parts
and controls

12.5 kg

FM wire antenna (1)
AM loop antenna (1)
Models of area code U, CA;

Remote commander RM-PP506L (1)
R6 (size-AA) batteries (2)

Models of other area codes;

Remote commander RM-U305C (1)
R6 (size-AA) batteries (2)

Design and specifications are subject to change
without notice.

3

• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-

aged by heat.

Ω

µ

After correcting the original service problem, perform the follow-
ing 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.

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 pas-
sive VOM that is suitable. Nearly all battery operated digital
multimeters that have a 2 V AC range are suitable.  (See Fig. A)

0

0

0

4

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5

...................................................................

6

3-1. Disassembly Flow ...........................................................

7

3-2. Case (414535) .................................................................

8

3-3. S-VIDEO board, VIDEO Board and Tuner ....................

8

3-4. VIDEO.AU Board ...........................................................

9

3-5. DIGITAL Board ..............................................................

9

3-6. MAIN Board ................................................................... 10

.............................................................. 11

5-1. Block Diagram

– TUNER/VIDEO INPUT Section – .............................. 13

5-2. Block Diagram  – AUDIO DSP Section – ...................... 14
5-3. Block Diagram  – AUDIO CONTROL Section – .......... 15
5-4. Block Diagram  – POWER AMP Section – ................... 16
5-5. Block Diagram

– DISPLAY/KEY CONTROL Section – ........................ 17

5-6. Block Diagram  – POWER SUPPLY Section – ............. 18
5-7. Note for Printed Wiring Boards

and Schematic Diagrams ................................................ 19

5-8. Schematic Diagram  – DIGITAL (1/3)/

V-3 OPT Boards – ........................................................... 21

5-9. Schematic Diagram  – DIGITAL Board (2/3) – ............. 22
5-10. Schematic Diagram  – DIGITAL Board (3/3) – ............. 23
5-11. Printed Wiring Board

– DIGITAL Board (Component Side) – ......................... 24

5-12. Printed Wiring Boards

– DIGITAL (Conductor Side)/V-3 OPT Boards – ......... 25

5-13. Printed Wiring Board  – VIDEO Board – ....................... 26
5-14. Schematic Diagram  – VIDEO Board – ......................... 27
5-15. Printed Wiring Boards

– S-VIDEO/VIDEO 3/VIDEO.AU Boards – ................. 28

5-16. Schematic Diagram

– S-VIDEO/VIDEO 3/VIDEO.AU Boards – ................. 29

5-17. Printed Wiring Board  – MAIN Board – ........................ 30
5-18. Schematic Diagram  – MAIN Board (1/3) – .................. 31
5-19. Schematic Diagram  – MAIN Board (2/3) – .................. 32
5-20. Schematic Diagram  – MAIN Board (3/3) – .................. 33
5-21. Printed Wiring Board  – BIAS Board – .......................... 34
5-22. Schematic Diagram  – BIAS Board – ............................. 35
5-23. Printed Wiring Boards  – H.P/PRE/SPOUT Boards – ... 36
5-24. Schematic Diagram  – H.P/PRE/SPOUT Boards – ....... 37
5-25. Printed Wiring Board  – DISPLAY Board – .................. 38
5-26. Schematic Diagram  – DISPLAY Board – ..................... 39
5-27. Printed Wiring Boards

– KEY/MUTING/POWER Boards – .............................. 40

5-28. Schematic Diagram

– KEY/MUTING/POWER Boards – .............................. 41

5-29. Printed Wiring Boards

– AC/DC 1/DC 2/PR 1/SEC 1 Boards – ......................... 42

5-30. Schematic Diagram

– AC DC 1/DC 2/PR 1/SEC 1 Boards – ......................... 43

5-31. IC Pin Function Description ........................................... 49

6-1. Case Section .................................................................... 55
6-2. Front Panel Section-1 ...................................................... 56
6-3. Front Panel Section-2 ...................................................... 57
6-4. Chassis Section-1 ............................................................ 58
6-5. Chassis Section-2 ............................................................ 59
6-6. Chassis Section-3 ............................................................ 60
6-7. Chassis Section-4 ............................................................ 61
6-8. BIAS Board Section ........................................................ 62
6-9. MAIN Board Section ...................................................... 63
6-10. Foot Section .................................................................... 64

............................... 65