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SERVICE MANUAL
STR-W770 is RECEIVER section in
MHC-W770AV.
Manufactured under license from Dolby Laboratories
Licensing Corporation.
"DOLBY", "PRO LOGIC" and the double-D symbol a are
trademarks of Dolby Laboratories Licensing Corporation.
Tuner section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
87.5-108.0MHz
Aerial
FM lead aerial
Aerial terminals
75 ohm unbalanced
Intermediate frequency 10.7MHz
AM tuner section
Tuning range
(Thai,Australian,E)
AM: 530-1,710kHz
(with interval set at 10kHz)
531-1,710kHz
(with interval set at 9kHz)
(EXCEPT Thai,Australian,E)
MW: 531-1,602kHz
(with interval set at 9kHz)
(EXCEPT Thai,Australian,E)
SW: 5.95-17.90MHz
(with interval set at 9kHz)
Intermediate frequency 450kHz
Aerial
AM loop aerial,
External aerial terminal
Video section
Inputs
AV INPUT VIDEO
(phone jack) :
1 Vp-p, 75 ohms
MONITOR OUT
(phone jack) :
1 Vp-p, 75 ohms
MICROFILM
STR-W770
SPECIFICATIONS
Amplifier section
DIN power output
Music power output
Inputs
Outputs
FM STEREO/FM-AM RECEIVER
E Model
Australian Model
80W +80W
(6 ohms at 1kHz, DIN)
190W + 190W
(6 ohms at 1kHz, 10%, THD)
MD/VIDEO 1 IN (phono jacks) : voltage 250 mV,
impedance 47 kilo ohms AV INPUT AUDIO
(phone jacks) : voltage 250 mV, impedance 47
kilo ohms
MIX/MIC (phone jack) :sensitivity 1mV,
impedance 10 kilo ohms
MD/VIDEO 1 OUT
(phone jacks) : voltage 250
mV, impedance 1 kilo ohm
PHONES (stereo phone
jack) : accepts headphone
of 8 ohms or more.
SPEAKER : accepts
impedance of 6 to 16
ohms
SUPER WOOFER :
Voltage 1 V, impedance 1
kilo ohms
— Continued on next page —
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Related Manuals for Sony STR-W770
Summary of Contents for Sony STR-W770
- Page 1 STR-W770 SERVICE MANUAL E Model Australian Model STR-W770 is RECEIVER section in MHC-W770AV. Manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY”, “PRO LOGIC” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation. SPECIFICATIONS Tuner section Amplifier section...
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Page 2: Table Of Contents
MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS FM STEREO/FM-AM RECEIVER 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. -
Page 3: General
SECTION 1 GENERAL — FRONT PANEL — 1 2 3 4 5 6 7 8 9 !º !¡ !™ #¶ #§ !£ #∞ #¢ !¢ #£ #™ !∞ !§ #¡ !¶ #º @ª @• @¶ @§ @∞ @¢ @£ @™ @¡... - Page 4 — BACK PANEL — $§ #• #ª $º $¡ $∞ $™ $£ $¢ Photo : E MODEL #• SYSTEM CONTROL #ª MD/VIDEO jack $º FRONT SPEAKER terminal $¡ SUPER WOOFER jack $™ MONITOR OUT jack $£ CENTER SPEAKER terminal $¢ REAR SPEAKER terminal VOLTAGE SELECTOR switch (EXCEPT Thai, Australian model)
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Page 5: Test Mode
SECTION 3 SECTION 2 DIAGRAMS TEST MODE FL DISPLAY/KEY LED TEST MODE AGING MODE 3-1. CIRCUIT BOARDS LOCATION Press the REPEA T, ENTER/NEXT and SURR OUND b uttons CD aging mode sim ultaneousl y. To e xecute the CD a ging, set the three discs to the CD tra y and All FL segments and all LEDs turn on. -
Page 14: Ic Pin Function
3-9. IC PIN FUNCTION • IC501 TMP87CM75F-6623 (DISPLAY CONTROL) Pin No. Pin Name Description — Not used — Power supply (–35V) COM CLK Transfer clock output serial data ST DATA IN Serial data input COM DATA Serial data output ST CE Chip enable output LED LAT Latch output to IC504... - Page 15 Pin No. Pin Name Description FL–1G FL–2G FL–3G FL–4G FL–5G FL–6G Grid output to FL501 FL–7G FL–8G FL–9G FL–10G FL–11G FL–12G FL–13G FL–14G FL–P1 FL–P2 FL–P3 FL–P4 FL–P5 FL–P6 FL–P7 FL–P8 FL–P9 FL–P10 FL–P11 FL–P12 FL–P13 FL–P14 FL–P15 FL–P16 FL–P17 Segment output to FL501 FL–P18 FL–P19...
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Page 16: 3-10. Ic Block Diagrams
3-10. IC BLOCK DIAGRAMS IC3001 LA2786 P. S. P. S. DUAL T CONTROL CMODE MUTE CTRIM CONTROL IC3000 LV1016 INV-PHASE ADM-CONT SRAM L+DELAY R+DELAY VOL/MUTE OUT-FILTER – DC-OUT IN-FILTER (7k/5k) (40kHz) L–R S-TRIM (–6dB) B-NR – 31 –... - Page 17 IC105 M62427FP-A KEY IN2 BB22 SBAND GRAPHIC EQUALIZER – BPF OUT BUF IN1 – BPF IN BUF OUT1 IN 2B AVDD – – – DGND IN 2A LATCH – U-CON AVSS INTER DATA – – FACE AGND CLOCK IN 1A DVDD PORT C –...
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Page 18: Exploded Views
SECTION 4 EXPLODED VIEWS Note: • -XX, -X mean standardiz ed par ts, so the y ma y • The mechanical parts with no reference number The components identified by mark ! or ha ve some diff erences from the or iginal one . in the e xploded vie ws are not supplied. -
Page 19: Panel Section
4-991-317-01 KNOB (JOG) 4-984-085-01 SPRING (ENTER), COMPRESSION X-4948-613-1 PANEL ASSY, FRONT * 64 A-4398-467-A PANEL BOARD, COMPLETE (EXCEPT AUS,TH) 4-962-708-11 EMBLEM (4-A), SONY * 64 A-4398-468-A PANEL BOARD, COMPLETE (AUS) X-4948-612-1 DISPLAY ASSY, BUTTON * 64 A-4403-218-A PANEL BOARD, COMPLETE (TH) -
Page 20: Electrical Parts List
SECTION 5 AMP-A ELECTRICAL PARTS LIST Note: • Due to standardization, replacements in the • RESIST ORS When indicating parts by reference number, par ts list ma y be different from the par ts All resistors are in ohms. please include the board naame. specified in the diagrams or the components METAL: metal-film resistor used on the set. - Page 21 AVIN MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 1-666-060-11 AVIN BOARD C106 1-137-375-11 FILM 0.068uF C107 1-137-440-11 FILM 0.018uF ********** C108 1-137-440-11 FILM 0.018uF < CAPACITOR > C109 1-137-437-11 FILM 0.0056uF 5% C110 1-130-479-00 MYLAR 0.0047uF 5% C6301 1-162-286-31 CERAMIC...
- Page 22 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C802 1-136-165-00 FILM 0.1uF C3038 1-126-964-11 ELECT 10uF C803 1-104-482-11 ELECT 4700uF C3039 1-126-964-11 ELECT 10uF C804 1-104-482-11 ELECT 4700uF C3040 1-126-964-11 ELECT 10uF C807 1-126-964-11 ELECT 10uF C3041 1-126-923-11 ELECT...
- Page 23 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks < IC > R111 1-249-441-11 CARBON 100K 1/4W R112 1-249-421-11 CARBON 2.2K 1/4W F IC101 8-759-634-51 IC M5218AP R113 1-249-435-11 CARBON 1/4W IC105 8-759-460-02 IC M62427FP-A R115 1-249-441-11 CARBON 100K 1/4W...
- Page 24 MAIN MIC ECHO Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R183 1-249-441-11 CARBON 100K 1/4W R2003 1-249-429-11 CARBON 1/4W R184 1-249-425-11 CARBON 4.7K 1/4W F R2004 1-249-429-11 CARBON 1/4W (TH) R2005 1-249-441-11 CARBON 100K 1/4W R184 1-249-429-11 CARBON 1/4W...
- Page 25 MIC ECHO PANEL VOLUME Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C6032 1-162-306-11 CERAMIC 0.01uF C517 1-137-374-11 FILM 0.047uF C6033 1-162-306-11 CERAMIC 0.01uF C518 1-162-306-11 CERAMIC 0.01uF C519 1-124-464-11 ELECT 0.22uF < TERMINAL > C520 1-137-371-11 FILM 0.015uF C521...
- Page 26 PANEL VOLUME Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks D587 8-719-987-63 DIODE 1N4148M R528 1-247-843-11 CARBON 3.3K 1/4W D588 8-719-987-63 DIODE 1N4148M R529 1-249-427-11 CARBON 6.8K 1/4W F D589 8-719-987-63 DIODE 1N4148M R530 1-249-431-11 CARBON 1/4W R531 1-249-437-11 CARBON...
- Page 27 PANEL VOLUME SURROUND AMP Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R619 1-249-429-11 CARBON 1/4W S538 1-762-751-11 SWITCH, TACTILE (DISPLAY) R620 1-249-429-11 CARBON 1/4W R621 1-249-429-11 CARBON 1/4W < VIBRATOR > R622 1-249-429-11 CARBON 1/4W R623 1-249-429-11 CARBON 1/4W...
- Page 28 SURROUND AMP SUPPLY POWER Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C4012 1-126-965-11 ELECT 22uF R4063 1-249-417-11 CARBON 1/4W F C4013 1-126-967-11 ELECT 47uF R4064 1-249-431-11 CARBON 1/4W C4040 1-126-963-11 ELECT 4.7uF R4065 1-249-441-11 CARBON 100K 1/4W C4051...
- Page 29 STR-W770 SUPPLY POWER Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks ! R830 1-215-881-11 METAL OXIDE MISCELLANEOUS (TH) ************* ! R831 1-216-446-00 METAL OXIDE (EXCEPT TH) 1-233-545-21 ENCAPSULATED COMPONENT (AUS,TH) ! R831 1-215-881-11 METAL OXIDE 1-233-546-21 ENCAPSULATED COMPONENT...