Sony TA-FB940R User manual

AEP Model

UK Model

E Model

Australian Model

SPECIFICATIONS

SERVICE MANUAL

INTEGRATED STEREO AMPLIFIER

TA-FB940R

Photo: BLACK model

Amplifier section

DIN power output

120 W + 120 W (4 Ωat 1 kHz)

Except UK, Singapore, Malaysia:

80 W + 80 W (8 Ωat 1 kHz)

95 W + 95 W (4 Ωat 1 kHz)

UK, Singapore, Malaysia model:

60 W + 60 W (8 Ωat 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:

7 Hz - 300 kHz

–3

S/N (network A)

PHONO

94 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)

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

210 W

Dimensions (approx.) (w/h/d)

430 ×150 ×420 mm

incl. projecting parts and controls

Mass (approx.)

10.3 kg

Supplied accessories

•Remote commander (remote) (1) RM-S336

•Sony batteries R6 (size-AA) (2)

Design and specifications are subject to change without

notice.

SAFETY-RELATED COMPONENT WARNING !!

COMPONENTS IDENTIFIED BY MARK 0OR DOTTED LINE

WITH MARK 0ON 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.

TABLE OF CONTENTS

1. GENERAL .......................................................................... 3

2. ELECTRICAL ADJUSTMENT ..................................... 4

3. DIAGRAMS

3-1. Circuit Boards Location ........................................................ 5

3-2. Schematic Diagram –Input Section –.................................. 6

3-3. Printed Wiring Board –Input Section –................................ 7

3-4. Schematic Diagram –Main Section –.................................. 8

3-5. Printed Wiring Board –Main Section –................................ 9

3-6. Schematic Diagram –Panel Section –................................ 10

3-7. Printed Wiring Board –Panel Section –............................. 11

3-8. Schematic Diagram –Power Section –............................... 12

3-9. Printed Wiring Board –Power Section –............................ 13

3-10. IC Block Diagrams ............................................................ 14

3-11. IC Pin Function ................................................................. 14

4. EXPLODED VIEW

4-1. Case Section ........................................................................ 15

4-2. Front Panel Section ............................................................. 16

4-3. Chassis Section ................................................................... 17

5. ELECTRICAL PARTS LIST ........................................ 18

Front Panel Descriptions

SECTION 1

GENERAL

1PROTECTION indicator

2POWER button

3Remote sensor

4EON LINK indicator

5TAPE 1/DAT indicator

6TAPE 2/MD indicator

7AUX indicator

8SACD/CD indicator

9TUNER indicator

10 PHONO indicator

11 INPUT SELECTOR knob

12 VOLUME knob

13 SOURCE DIRECT button and indicator

14 TAPE MONITOR knob

15 SUBSONIC button

16 LOUDNESS button

17 BALANCE knob

18 TREBLE knob

19 BASS knob

20 SPEAKERS knob

21 PHONE jack

22 EON LINK button

23465110

1819

This section is extracted from

instruction manual.

Rear Panel Descriptions

SPEAKERS

EON CONTROL

++––

TAPE1/DAT

REC OUT IN

IMPEDANCE USE 4–16Ω

A+B USE 8–16Ω

BI WIRE USE 4–16Ω

TAPE2/MD

REC OUT IN

AUX

SACD/

TUNER

PHONO

SIGNAL

GND

AC OUTLET

SWITCHED 100W MAX

42 3 51

0qa 9 8 7 6

1PHONO

2U(SIGNAL GND)

3SPEAKERS A/B

6Mains lead

7TAPE1/DAT

8TAPE2/MD

4EON CONTROL IN

5AC OUTLET

(Except UK, Singapore, Malaysia)

9AUX

0SACD/CD

qa TUNER

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).

2. Connect a digital voltmeter to the CN500 and CN600.

1 pin 2 pin

–

CN500 (L-CH)

CN600(R-CH)

3. Set the slide regulator to 0V, and press the POWER button

(ON) on the set.

4. Raise gradually the slide regulator voltage up to the rated voltage.

5. At this time, confirm that the SP relay is turned on (it will click).

6. Adjust the RV500 and RV600 so that a reading of digital

voltmeter is 7 ± 1 mV.

7. Return the slidack to 0 V, and press the POWER button (OFF)

on the set.

Adjustment Location :

[MAIN BOARD] – COMPONENT SIDE –

CN600

(R-CH)

CN500

(L-CH)

RV600

Bias (R-CH)

RV500

Bias (L-CH)

DIGITAL

VOLTMETER

DIGITAL

VOLTMETE

TA-FB940R

SECTION 3

DIAGRAMS

3-1. CIRCUIT BOARDS LOCATION THIS NOTE IS COMMON FOR PRINTED WIRING

BOARDS AND SCHEMATIC DIAGRAMS.

(In addition to this, the necessary note is printed

in each block.)

For schematic diagrams.

Note:

• All capacitors are in µF unless otherwise noted. pF: µµF

50 WV or less are not indicated except for electrolytics

and tantalums.

• All resistors are in Ωand 1/4W or less unless otherwise

specified.

•f: internal component.

•2: nonflammable resistor.

•5: fusible resistor.

•C: panel designation.

For printed wiring boards.

Note:

•X: parts extracted from the component side.

•Y: parts extracted from the conductor side.

•b: Pattern from the side which enables seeing.

•U: B+ Line.

•V: B– Line.

•H: adjustment for repair.

• Voltages and waveforms are dc with respect to ground

under no-signal (detuned) conditions.

no mark : POWER ON

• Voltages are taken with a VOM (Input impedance 10 MΩ).

Voltage variations may be noted due to normal produc-

tion tolerances.

• Waveforms are taken with a oscilloscope.

Voltage variations may be noted due to normal produc-

tion tolerances.

• Circled numbers refer to waveforms.

• Signal path.

F: TUNER

• Abbreviation

G : German model.

EE : East European model.

AUS : Australian model.

SP : Singapore model.

MY : Malaysia model.

WAVEFORM

IC902 1XOUT

Note: The components identified by mark 0or dotted line

with mark 0are critical for safety.

Replace only with part number specified.

• Indication of transistor

These are omitted

4MHz

3.8Vp-p

PANEL board

TONE board INPUT board

MAIN board

SP-TM board

PHONO board

PS board OUTLET board

(EXCEPT UK, SP, MY)

VOL board

SIRCS board

SIRCS SUB board

HP board

S-D LED board

TA-FB940R

3-2. SCHEMATIC DIAGRAM –INPUT SECTION –

(Page 8)

(Page 10)

C101 – 105, 201 – 205

EXCEPT UK, SP, MY

SACD/CD

470

16V

470

16V

2SB1640

25V

2SD2525

63V

R240

R140

+15V

–15V

–B

GND

EXCEPT UK, SP, MY

UK, SP, MY

MODEL

JW12

UK, SP, MY

MODEL

JW11

16V

TA-FB940R

3-3. PRINTED WIRING BOARD –INPUT SECTION –•See page 5 for Circuit Boards Location.

Ref. No. Location

•Semiconductor

Location

(INPUT Board)

D100 D-5

D101 D-4

D102 D-4

D103 C-4

D104 B-4

D105 A-4

D106 A-4

D107 D-5

D108 C-7

D140 C-9

D240 C-9

Q100 C-6

Q101 C-6

Q102 C-6

Q103 C-7

Q104 C-7

Q105 C-7

Q140 C-9

Q240 D-9

Ref. No. Location

•Semiconductor

Location

(PHONO Board)

D170 B-1

IC150 A-2

Q150 A-3

Q151 A-3

Q250 B-3

Q251 B-3

C101 –105, 201 –205

EXCEPT UK, SP, MY

TA-FB940R

3-4. SCHEMATIC DIAGRAM –MAIN SECTION –•See page 14 for IC Block Diagrams.

C511, 512, 611, 612

R533, 534, 633, 634

EXCEPT UK, SP, MY

TA-FB940R

3-5. PRINTED WIRING BOARD –MAIN SECTION –•See page 5 for Circuit Boards Location.

Ref. No. Location

•Semiconductor

Location

(SP-TM Board)

D511 E-3

D512 E-3

D513 F-4

D700 A-2

D701 A-2

D702 B-2

IC700 B-3

Q700 A-4

Q701 C-2

D500 C-11

D501 C-11

D502 C-11

D503 D-11

D504 D-11

D505 D-10

D506 D-5

D507 C-6

D600 F-11

D601 F-11

D602 F-11

D603 F-11

D604 F-11

D605 F-10

D606 E-5

D607 D-5

D703 F-5

IC701 E-10

Q500 C-12

Q501 D-12

Q502 D-12

Q503 D-12

Q504 D-12

Q505 D-12

Q506 C-10

Q507 D-11

Q508 D-11

Q509 D-11

Q510 D-10

Q511 D-9

Q512 D-9

Q513 C-6

Q514 C-9

Q515 C-7

Q516 D-6

Q600 F-12

Q601 F-12

Q602 F-12

Q603 E-12

Q604 F-12

Q605 F-12

Q606 F-10

Q607 F-11

Q608 F-11

Q609 F-11

Q610 F-10

Q611 F-9

Q612 F-9

Q613 F-9

Q614 F-6

Q615 F-7

Q616 E-5

Q702 F-5

Ref. No. Location

•Semiconductor

Location

(MAIN Board)

10 10

TA-FB940R

3-6. SCHEMATIC DIAGRAM –PANEL SECTION –•See page 5 for Waveform. •See page 14 for IC Block Diagrams. •See page 14 for IC Pin Function.

(Page 8)

(Page 6)

(Page 8)

SACD/CD

R807–810

390: UK, SP, MY MODEL

470: EXCEPT UK, SP, MY

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