Sony TA-FB740R Service Manual
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Sony TA-FB740R Service Manual

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SERVICE MANUAL

Amplifier section
DIN power output
100 W + 100 W (4 Ω at 1 kHz)
60 W + 60 W (8 Ω at 1 kHz)
Total harmonic distortion
Less than 0.008% (at 10 W output 1 kHz)
Frequency response
PHONO (20 Hz - 20 kHz): RIAA equalization curve
±0.5 dB
TUNER, SACD/CD, AUX, TAPE1/DAT, TAPE2/MD:
+0
7 Hz - 300 kHz
dB
–3
S/N (network A)
PHONO
90 dB
TUNER, SACD/CD, AUX, TAPE1/DAT, TAPE2/MD:
105 dB
Output voltage/impedance
REC OUT 1, 2: 150 mV, 1 kΩ
PHONES: 10 mW (at 8 Ω)
Speakers impedance
4 - 16 Ω, 8 - 16 Ω (SPEAKERS A+B)
Damping factor
500 (8 Ω, 1 kHz)
TA-FB740R
SPECIFICATIONS
General
System
Power amplifier: Pure-complementary SEPP OCL
power amplifier with all stages directly coupled
Preamplifier: Low-noise, equalizer amplifier
Power requirements
230 V AC, 50/60 Hz
Power consumption
180 W
Dimensions (approx.) (w/h/d)
430 × 150 × 420 mm
incl. projecting parts and controls
Mass (approx.)
8.6 kg
Supplied accessories
• Remote commander (remote) (1) RM-S336
• Sony batteries R6 (size-AA) (2)
Design and specifications are subject to change without
notice.
INTEGRATED STEREO AMPLIFIER
AEP Model
UK Model
E Model
Australian Model
1

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Summary of Contents for Sony TA-FB740R

  • Page 1: Service Manual

    • Remote commander (remote) (1) RM-S336 REC OUT 1, 2: 150 mV, 1 kΩ PHONES: 10 mW (at 8 Ω) • Sony batteries R6 (size-AA) (2) Design and specifications are subject to change without Speakers impedance 4 - 16 Ω, 8 - 16 Ω (SPEAKERS A+B) notice.

  • Page 2: Table Of Contents

    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.

  • Page 3: General

    SECTION 1 GENERAL Front Panel Descriptions 1 PROTECTION indicator 13 SOURCE indicator 2 POWER button 14 SOURCE DIRECT button and indicator 3 Remote sensor 15 LOUDNESS button 16 TAPE MONITOR knob 4 TAPE 1/DAT indicator 5 TAPE 2/MD indicator 17 BALANCE knob 6 AUX indicator 18 TREBLE knob 7 CD indicator...

  • Page 4: Electrical Adjustment

    SECTION 2 ELECTRICAL ADJUSTMENT Bias Adjustment NOTE: 1. Perform the adjustment after the unit has warmed up sufficiently. 2. Perform the bias adjustment if the power transistor has been replaced. Procedure: 1. Rotate fully the bias adjusting semi-fixed resistors (RV500, RV600) to the MIN position (counterclockwise).

  • Page 5: Diagrams

    SECTION 3 DIAGRAMS 3-1. CIRCUIT BOARDS LOCATION WAVEFORM THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) 3.8Vp-p For schematic diagrams. 4MHz Note: IC902 1 XOUT •...

  • Page 6: Schematic Diagram - Input Section

    TA-FB740R 3-2. SCHEMATIC DIAGRAM – INPUT SECTION – • See Page 14 for IC Block Diagrams. R140 82 1W 2SD2525 JW12 MODEL (Page 8) R240 2SB1640 82 1W MODEL (Page 10) JW12 C101–105 C201–205 EXCEPT UK, SP, MY Note: The components identified by mark 0 or dotted line with mark 0 are critical for safety.

  • Page 7: Printed Wiring Board - Input Section

    TA-FB740R 3-3. PRINTED WIRING BOARD – INPUT SECTION – • See page 5 for Circuit Boards Location. • Semiconductor • Semiconductor Location Location (INPUT Board) (PHONO Board) Ref. No. Location Ref. No. Location D100 D170 D101 D102 IC150 D103 D104...

  • Page 8: Schematic Diagram - Main Section

    TA-FB740R 3-4. SCHEMATIC DIAGRAM – MAIN SECTION – • See page 14 for IC Block Diagrams. EXCEPT UK, SP, MY EXCEPT UK, SP, MY...

  • Page 9: Printed Wiring Board - Main Section

    TA-FB740R 3-5. PRINTED WIRING BOARD – MAIN SECTION – • See page 5 for Circuit Boards Location. • Semiconductor • Semiconductor Location Location (SP-TM Board) (MAIN Board) Ref. No. Location Ref. No. Location D511 D500 C-11 D512 D501 C-11 D513...

  • Page 10: Schematic Diagram - Panel Section

    TA-FB740R 3-6. SCHEMATIC DIAGRAM – PANEL SECTION – • See page 5 for Waveforms. • See page 14 for IC Block Diagram. • See page 14 for IC Pin Function. (Page 8) (Page (Page 6) 0.01 R807-810 390: AEP,G,EE,CIS,AUS (Page 6)

  • Page 11: Printed Wiring Board - Panel Section

    TA-FB740R 3-7. PRINTED WIRING BOARD – PANEL SECTION – • See page 5 for Circuit Boards Location. • Semiconductor Location Ref. No. Location (Page 7) D902 D903 D904 D905 D906 D907 D908 B-10 D910 D912 D913 D914 D915 D916 D917...

  • Page 12: Schematic Diagram - Power Section

    TA-FB740R 3-8. SCHEMATIC DIAGRAM – POWER SECTION – EXCEPT UK, SP, MY...

  • Page 13: Printed Wiring Board - Power Section

    TA-FB740R 3-9. PRINTED WIRING BOARD – POWER SECTION – • See page 5 for Circuit Boards Location. EXCEPT UK, SP, MY...

  • Page 14: Ic Block Diagrams

    TA-FB740R 3-10. IC BLOCK DIAGRAMS 3-11. IC PIN FUNCTION • IC902 Input Control & LED Drive (TMP47C103N-JP47) (PANEL BOARD) • Input board Pin No. Pin Name Function IC101 LC7821 X OUT System clock (4MHz) X IN RESET Reset input Mode select input...

  • Page 15: Exploded View

    SECTION 4 EXPLODED VIEWS NOTE: The components identified by • Items marked “*” are not stocked since they are • Abbreviation mark 0 or dotted line with mark : German model seldom required for routine service. Some delay 0 are critical for safety. : Singapore model should be anticipated when ordering these items.

  • Page 16: Front Panel Section

    Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-942-568-41 EMBLEM (NO.5), SONY * 64 1-669-498-11 HP BOARD 4-218-232-02 EMBLEM (MOS) * 65 1-669-494-11 SP-SW BOARD 4-974-510-01 SCREW (+BV 3X8 CU) A-4428-719-A PANEL BOARD, COMPLETE 4-985-642-01 CUSHION...

  • Page 17: Chassis Section

    4-3. CHASSIS SECTION Q513 not supplied Q614 Q702 Q514 Q702 not supplied not supplied not supplied not supplied not supplied The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Ref.

  • Page 18: Electrical Parts List

    SECTION 5 INPUT ELECTRICAL PARTS LIST Note: • Due to standardization, replacements in the parts list • SEMICONDUCTORS The components identified by In each case, u: µ , for example: may be different from the parts specified in the mark 0 or dotted line with mark uA...: µ...
  • Page 19 INPUT MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R202 1-259-500-11 CARBON 1/6W < CONNECTOR > R203 1-259-500-11 CARBON 1/6W R204 1-259-500-11 CARBON 1/6W * CN500 1-560-060-00 PIN, CONNECTOR 2P R205 1-259-500-11 CARBON 1/6W CN503 1-691-770-11 PLUG (MICRO CONNECTOR) 8P R214 1-259-500-11 CARBON...
  • Page 20 MAIN OUTLET PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark Q602 8-729-119-78 TRANSISTOR 2SC1815YGR-TPE2 0 R606 1-249-411-11 CARBON 1/4W Q603 8-729-202-67 TRANSISTOR 2SK246GR3-TPE2 R607 1-249-883-11 CARBON 1/4W Q604 8-729-021-73 TRANSISTOR 2SC2229-OY R608 1-249-883-11 CARBON 1/4W Q605 8-729-021-74 TRANSISTOR 2SA949-OY 0 R609...
  • Page 21 PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C305 1-136-165-00 MYLAR 0.1uF 5.00% 50V < IC > C306 1-130-471-00 MYLAR 0.001uF C400 1-136-171-00 MYLAR 0.33uF 5.00% 50V IC901 8-759-962-08 IC BA6208 C401 1-137-366-11 MYLAR 0.0022uF 5.00% 50V IC902 8-759-392-41 IC TMP47C103N-JP47 C402...
  • Page 22 PANEL PHONO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R912 1-249-429-11 CARBON 1/4W C156 1-137-471-11 MYLAR 0.016uF 5.00% 50V R913 1-249-425-11 CARBON 4.7K 1/4W F C157 1-126-964-11 ELECT 10uF 20.00% 50V R914 1-247-807-31 CARBON 1/4W (EXCEPT UK,SP,MY) R917 1-249-433-11 CARBON...
  • Page 23 PHONO SIRCS SIRCS SUB Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < RESISTOR > 1-564-321-00 PIN, CONNECTOR 2P * CN4 1-564-321-21 PIN, CONNECTOR 2P (EXCEPT UK,SP,MY) R150 1-249-931-11 CARBON 2.2K 1/4W * CN750 1-564-242-00 PIN, CONNECTOR 5P (EXCEPT UK,SP,MY) * CN751 1-766-920-11 PIN, CONNECTOR 4P...
  • Page 24 SP-SW SP-TM Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-669-494-11 SP-SW BOARD C727 1-162-294-31 CERAMIC 0.001uF (EXCEPT UK,SP,MY) ************ < RESISTOR > < CONNECTOR > R801 1-260-327-11 CARBON 1/2W CN702 1-766-203-11 PLUG,CONNECTOR PIN(PC BOARD)5P R802 1-260-327-11 CARBON 1/2W CN703...
  • Page 25 SP-TM Ref. No. Part No. Description Remark < TERMINAL > TM501 1-537-235-11 TERMINAL BOARD (SP) (SPEAKERS) (UK,SP,MY) TM501 1-537-228-11 TERMINAL BOARD (SP) (SPEAKERS) (EXCEPT UK,SP,MY) ************************************************************** 1-669-496-11 VOL BOARD ********** < CAPACITOR > C310 1-101-004-00 CERAMIC 0.01uF < CONNECTOR > CN302 1-691-772-11 PLUG (MICRO CONNECTOR) 10P CN303...
  • Page 26 TA-FB740R Sony Corporation 9-929-247-11 2000E097561-1 Audio Entertainment Group Printed in Hungary © 2000. 5 Published by HA Quality Assurance Dept.

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