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SERVICE MANUAL
Audio power specifications (US model)
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 milli-
watts to rated output.
Amplifier section
Stereo mode
Frequency response
Inputs
Sensitivity
CD,
MD/TAPE,
150 mV
TV/SAT,
VIDEO
Sensitivity
CD,
MD/TAPE,
150 mV
TV/LD,
VIDEO
outputs
MICROFILM
Photo: US model
SPECIFICATIONS
(8 ohms at 20 Hz – 20 kHz less than
0.09 % total harmonic distortion)
100 W + 100 W (US model)
(DIN 1 kHz, 4 ohms)
60 W + 60 W (AEP, UK models)
TV/SAT, CD, MD/TAPE, VIDEO
(US model)
TV/LD, CD, MD/TAPE, VIDEO
(AEP, UK models)
10 Hz – 50 Hz ± 1 dB
Impedance
S/N
50
78 dB
kilohms
(US model)
Impedance
S/N
50
78 dB
kilohms
(AEP, UK models)
MD/TAPE REC OUT:
Voltage: 150 mV,
impedance: 10 kilohms
VIDEO AUDIO OUT:
Voltage: 150 mV,
impedance: 10 kilohms
PHONES: Accepts low and high
impedance headphones
STR-DE135
Muting
BASS BOOST
TONE
Tuner Section
FM stereo, FM/AM superheterodyne tuner
FM tuner section
Tuning range
Antenna terminals
Intermediate frequency
Sensitivity
Usable sensitivity
S/N
Harmonic distortion at 1 kHz
Separation
Frequency response
Selectivity
AM tuner section
Tuning range
FM STEREO/FM-AM-RECEIVER
US Model
AEP Model
UK Model
Full mute
+ 10 dB at 70 Hz
± 8 dB at 100 Hz and 10 kHz
87.5 – 108.0 MHz
75 ohms, unbalanced
10.7 MHz
Mono: 18.3 dBf, 4.5 µV
Stereo: 38.3 dBf, 45 µV (US model)
Mono: 18.3 dBf, 2.2 µV/75 ohms
Stereo: 38.3 dBf, 22.5 µV/75 ohms
(AEP, UK models)
11.2 dBf, 2 µV (IHF) (US model)
11.2 dBf, 1 µV/75 ohms (IHF)
(AEP, UK models)
Mono: 76 dB
Stereo: 70 dB
Mono: 0.3 %
Stereo: 0.5 %
45 dB at 1kHz
+0.5
30 Hz – 15 kHz
dB
–2
60 dB at 400 kHz
10 kHz interval*
530 – 1710 kHz
9 kHz interval
531 – 1710 kHz (US model)
531 – 1602 kHz (AEP, UK models)
– Continued on next page –

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Table of Contents

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   Summary of Contents for Sony STR-DE135

  • Page 1 STR-DE135 SERVICE MANUAL US Model AEP Model UK Model Photo: US model SPECIFICATIONS Audio power specifications (US model) Muting Full mute BASS BOOST + 10 dB at 70 Hz POWER OUTPUT AND TOTAL HARMONIC DISTORTION TONE ± 8 dB at 100 Hz and 10 kHz With 8-ohm load, both channels driven, from 20 –...
  • Page 2: Table Of Contents

    LINE WITH MARK ! 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 PUB- LISHED BY SONY.
  • Page 3: Servicing Notes

    SECTION 1 SERVICING NOTES MODEL IDENTIFICATION SAFETY CHECK-OUT After correcting the original service problem, perform the follow- – Rear view – 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.
  • Page 4: General

    SECTION 2 GENERAL Location of controls • Front view – 3 45 !™ 8 9 0 !¡ @¢ !£ @∞ !¢ @§ !∞ !§!¶ !• !ª @º @¡ @™ @£ 1 I/u button 8 FM button !• MEMORY button (US model) (US model) 2 TUNING +, –...
  • Page 5: Disassembly

    SECTION 3 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. CASE 1 tapping screw 1 two tapping screws 2 case 1 two tapping screws FRONT PANEL SECTION 3 screw (BVTP3 × 8) 2 three connectors (CNP702 – 704) 4 claw 1 two flat wires (CNS204, CNP404)
  • Page 6 REAR PANEL SECTION 4 rear panel section 2 connector (CNP901) 3 four screws (BVTP3 × 8) 3 six screws (BVTP3 × 8) 1 flat wire (CNS205) MAIN BOARD 2 connector 3 three screws (CNP702) (BVTP3 × 8) 2 connector 3 three screws (CNS802) (BVTP3 ×...
  • Page 7: Test Mode

    SECTION 4 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 two buttons of [TV/SAT] (US model)* and [DIRECT] simultaneously, press the button to turn the power ON.
  • Page 8: Diagrams

    SECTION 5 DIAGRAMS • Circuit Boards Location SECONDARY board PRIMARY board STANDBY TRANS board POWER SWITCH board DISPLAY board MAIN board SPK SWITCH board VOLUME board KEY board TONE board – 8 –...
  • Page 9: Note For Printed Wiring Boards And Schematic Diagrams

    5-1. NOTES FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS • Waveforms – MAIN Board – – DISPLAY Board – Note on Printed Wiring Board: Note on Schematic Diagram: • X : parts extracted from the component side. 1 IC1 !¢ (XO) 1 IC201 #∞...
  • Page 10 STR-DE135 5-2. PRINTED WIRING BOARD – MAIN Board – • See page 8 for Circuit Boards Location. (Page 24) (Page (Page (Page • Semiconductor Location Ref. No. Location D421 D710 I-11 D721 D722 D723 D724 D801 D802 D-12 D804 D820...
  • Page 11: Schematic Diagram – Main Board (1/2)

    STR-DE135 5-3. SCHEMATIC DIAGRAM – MAIN Board (1/2) – • See page 10 for Waveform. • See page 21 for IC Block Diagrams. (Page (Page 20) (Page (Page The components identified by mark ! or dotted line with mark ! are critical for safety.
  • Page 12: 5-4. Printed Wiring Boards

    STR-DE135 5-4. PRINTED WIRING BOARDS – PANEL Section – • See page 8 for Circuit Boards Location. (Page 11) • Semiconductor Location Ref. No. Location D201 D202 D203 (Page D204 D223 A-10 D224 A-10 IC201 IC202 IC203 B-11 Q201 Q202 (Page 17) –...
  • Page 13 STR-DE135 (Page 11) (Page 17) (Page 18) (Page 15) (Page 16) – 17 – – 18 –...
  • Page 14 STR-DE135 5-5. SCHEMATIC DIAGRAM – PANEL Section – • See page 10 for Waveform. • See page 22 for IC Block Diagram. (Page 14) 100k (Page The components identified by mark ! or dotted line with mark ! are critical for safety.
  • Page 15 STR-DE135 • IC Block Diagrams – MAIN Board – – DISPLAY Board – BU1922 (AEP, UK models) IC202 BA6208 MOTOR SWITCH DRIVE MOTOR TEST LOGIC AND OUTPUT SWITCH DRIVE SELECTOR SWITCH 57kHz OSCILLATOR ANTI- QUALITY BIT RECONSTRUCTION BANDPASS ALIASING GENERATOR...
  • Page 16 STR-DE135 5-6. PRINTED WIRING BOARDS – SPK SWITCH Board/SECONDARY Board/PRIMARY Board/STANDBY TRANS Board – • See page 8 for Circuit Boards Location. (Page 12) (Page 12) (AEP) (Page 12) (Page 12) (Page 23) (Page 12) (Page 24) – 23 –...
  • Page 17: Schematic Diagram

    STR-DE135 5-7. SCHEMATIC DIAGRAM – MAIN Board (2/2)/SPK SWITCH Board/SECONDARY Board/ PRIMARY Board/STANDBY TRANS Board – R742 1.2k 1/2W R792 1.2k 1/2W (Page 14) (Page 14) (Page 14) The components identified by mark ! or dotted line with mark ! are critical for safety.
  • Page 18: 5-8. Ic Pin Function Description

    5-8. IC PIN FUNCTION DESCRIPTION • DISPLAY BOARD IC201 µPD78044FGF-115-3B9 (SYSTEM CONTROLLER, FL DRIVER) Pin No. Pin Name Description 1 to 7 DIG7 to DIG1 Digit drive signal output to the fluorescent indicator tube (FL201) — Power supply terminal (+5V) Serial data transfer clock signal output to the LC78212 (IC401), PLL IC on FM/AM tuner pack S.CLK “L”...
  • Page 19 Pin No. Pin Name Description SYS-POWER Power on/off switch (S240 I/u) input terminal “L” is input when key pressing TUNER MUTE Muting control signal output to the FM/AM tuner pack “H”: muting on RDS serial clock signal input from the RDS decoder (IC1) RDS CLK IN (Used for the AEP and UK models only) Power down detection signal input from the reset signal generator (IC950)
  • Page 20: Exploded Views

    SECTION 6 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they The components identified by mark ! or dotted line with mark may have some difference from the original are seldom required for routine service.
  • Page 21 1-673-024-11 VOLUME BOARD 4-216-794-11 PLATE INDICATION (US) 1-769-941-11 WIRE (FLAT TYPE) (11 CORE) 4-216-794-21 PLATE INDICATION (AEP, UK) 1-673-025-11 TONE BOARD 4-996-698-01 EMBLEM, SONY A-4419-001-A KEY BOARD, COMPLETE (US) 4-951-801-01 BUTTON (S) A-4419-178-A KEY BOARD, COMPLETE (AEP, UK) 1-673-027-11 SPK SWITCH BOARD 4-998-717-01 KNOB (BAL) 4-951-620-01 SCREW (2.6X8), +BVTP...
  • Page 22 (3) CHASSIS SECTION T901 supplied supplied supplied The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-217-872-11 BOTTOM COVER 4-216-802-11 BACK PANEL (E20) (AEP)
  • Page 23: Electrical Parts List

    SECTION 7 DISPLAY ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark ! or dotted line with mark parts list may be different from the parts speci- are seldom required for routine service.
  • Page 24 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-4419-001-A KEY BOARD, COMPLETE (US) S216 1-762-751-11 SWITCH, TACTILE (TUNING/CHAR –) A-4419-178-A KEY BOARD, COMPLETE (AEP, UK) (AEP, UK) S216 1-762-875-21 SWITCH, KEYBOARD (TUNING –) (US) ******************** < CONNECTOR > S217 1-762-751-11 SWITCH, TACTILE (TUNING/CHAR +) (AEP, UK)
  • Page 25 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-4419-005-A MAIN BOARD, COMPLETE (US) C741 1-128-562-11 ELECT 47uF 100V A-4419-179-A MAIN BOARD, COMPLETE (AEP, UK) C742 1-126-925-11 ELECT 470uF ********************* C751 1-126-964-11 ELECT 10uF 3-905-609-01 SCREW (TRANSISTOR) C752 1-162-282-31 CERAMIC 100PF...
  • Page 26 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark CC07 1-162-282-31 CERAMIC 100PF IC801 8-759-231-58 IC TA7812S (AEP, UK) IC802 8-759-604-45 IC M5F79M12 CC12 1-162-306-11 CERAMIC 0.01uF IC803 8-759-604-35 IC M5F78M05L (AEP, UK) IC804 8-759-604-35 IC M5F78M05L CC13 1-162-306-11 CERAMIC 0.01uF...
  • Page 27 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R406 1-249-417-11 CARBON 1/4W R720 1-249-419-11 CARBON 1.5K 1/4W R407 1-249-417-11 CARBON 1/4W R721 1-249-425-11 CARBON 4.7K 1/4W R414 1-249-425-11 CARBON 4.7K 1/4W (AEP, UK) R418 1-249-417-11 CARBON 1/4W R721 1-249-427-11 CARBON...
  • Page 28 MAIN POWER SWITCH PRIMARY SECONDARY SPK SWITCH STANDBY TRANS TONE Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark RR04 1-249-393-11 CARBON 1/4W < JACK > (AEP, UK) RR05 1-249-393-11 CARBON 1/4W J741 1-750-733-11 JACK (LARGE TYPE) (PHONES) (AEP, UK) <...
  • Page 29 TONE VOLUME Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C472 1-124-463-00 ELECT 0.1uF MISCELLANEOUS C473 1-137-368-11 FILM 0.0047uF 5% *************** C474 1-137-372-11 FILM 0.022uF 1-773-195-11 WIRE (FLAT TYPE) (23 CORE) (AEP) < RESISTOR > 1-782-084-11 WIRE (FLAT TYPE) (23 CORE) (US) 1-769-941-11 WIRE (FLAT TYPE) (11 CORE) R420 1-249-415-11 CARBON...
  • Page 30 STR-DE135 Sony Corporation 99C0569-1 Printed in Japan © 1999. 3 9-928-840-11 Home A&V Products Company Published by Quality Assurance Dept. – 38 – (Shinagawa)

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