Sony TA-FA777ES Manuale utente

MICROFILM

SERVICE MANUAL

INTEGRATED STEREO AMPLIFIER

AEP Model

SPECIFICATIONS

TA-FA777ES

TABLE OF CONTENTS

1. GENERAL

Location of Controls ....................................................... 3

2. DISASSEMBLY ......................................................... 4

3. ELECTRICAL ADJUSTMENT............................ 6

4. DIAGRAMS

4-1. Notes for Printed Wiring Boards

and Schematic Diagrams ................................................ 7

4-2. Printed Wiring Boards

– INPUT/MAIN-B(L)/MAIN-B(R) Boards – ................ 8

4-3. Schematic Diagram

– INPUT(1/2)/MAIN-B(L)/MAIN-B(R) Boards – ........ 9

4-4. Printed Wiring Boards – BALANCE/FUNCTION SW/

SP TM/HP/TONE CONTROL/PRO.LED Boards – ...... 10

4-5. Schematic Diagram – BALANCE/FUNCTION SW/

SP TM/INPUT(2/2)/HP/TONE CONTROL(2/2)/

PRO.LED Boards – ......................................................... 11

4-6. Printed Wiring Boards – MAIN-A/RV/REC OUT/

PS PRE/PS/OUTLET Boards – ...................................... 12

4-7. Schematic Diagram – MAIN-A/

TONE CONTROL(1/2)/RV/REC OUT/PS PRE/PS/

OUTLET Boards –.......................................................... 13

5. EXPLODED VIEWS................................................ 14

6. ELECTRICAL PARTS LIST ............................... 17

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 PUB-

LISHED BY SONY.

SECTION 1

GENERAL This section is extracted from

instruction manual.

LOCATION OF CONTROLS

FRONT PANEL, TOP board, BOTTOM board

SUB CHASSIS, FUN-SW BOARD

Note: Follow the disassembly procedure in the numerical order given.

SECTION 2

DISASSEMBLY

three screws

(BV 3

two screws

(B 4

20)

three screws

(BV 3

three screws

(B 4

20)

three foots

five screw

(BV 3

bottom board

four screws

(FLAT HEAD)

four screws

(FLAT HEAD)

top board

two foots

two screws

(BV 3

front panel

knob (DIA.68)

screw

knob (DIA.48)

sub chassis

two screws

(BV 3

shield plate

four screws

(BV 3

rotary switch

(remote type)

four screws

(BV 3

FUN-SW board

two screws

(BV 3

nut

light interception sheet (B)

knob (DIA.29)

four screws

(BV 3

screw

(BV 3

power botton

assy

two screws

( 3

switch, push

(AC power)

connector

(CN806)

two connectors

(CN807, 808)

connector

(CN304)

nut

HEAT SINK (L) / (R) ASSY

MAIN A board, PS-PRE board

three connectors

(CN501, 502, 503)

heat sink (L) assy

two screws

heat sink (R) assy

three connectors

(CN551, 552, 553

)

two screws

three screws

(BV 3

two screws

rod

MAIN A board

three connectors

(CN203, 204, 205)

two screws

(BV 3

four connectors

(CN401, 402, 403, 404)

three connectors

(CN51, 52, 53)

PS-PRE board

Chassis (I)

four connectors

(CN802, 803, 804, 805)

Note: Adjustment should be performed 5 minutes later, after the power

switch is on.

Bias Adjustment

Setting:

ATTENUATOR (Volume) control: minimum

Input signal: No signal input

Procedure:

Adjust RT501 (L-CH) and RT551 (R-CH) for 70 mV reading on

the VTVM.

Adjustment Location:

SECTION 3

ELECTRICAL ADJUSTMENT

– MAIN-B (L) Board (Component side) – – MAIN-B (R) Board (Component side) –

–

level meter

(0.3V DC range) level meter

(0.3V DC range)

RT501

CN504

3L-CH

RT551

CN554

R-CH

SECTION 4

DIAGRAMS

4-1. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS

(In addition to this, the necessary note is printed in each block.)

Note on Schematic Diagram:

• 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.

•2: nonflammable resistor.

•5: fusible resistor.

•C: panel designation.

Note on Printed Wiring Boards:

•X: parts extracted from the component side.

•b: Pattern from the side which enables seeing.

• Indication of transistor.

•U: B+ Line.

•V: B– Line.

•H: adjustment for repair.

• Voltages and waveforms are dc with respect to ground

under no-signal conditions.

no mark: POWER ON

• Voltages are takenwithaVOM(Input impedance 10 MΩ).

Voltage variations may be noted due to normal produc-

tion tolerances.

• Signal path.

I: PHONO

NOTE:The components identified by mark 0or dotted line

with mark 0are critical for safety.

Replace only with part number specified.

These are omitted.

• Circuit Boards Location

PRO. LED board

HP board

TONE CONTROL board

MAIN-B (L) board

RV board

FUNCTION SW board

MAIN-A board

REC OUT board PS board

MAIN-B (R) board

BALANCE board

INPUT board

SP TM board

OUTLET board

PS-PRE board

TA-FA777ES

4-2. PRINTED WIRING BOARDS – INPUT/MAIN-B (L) /MAIN-B (R) Boards –

•See page 7 for Circuit Boards Location.

• Semiconductor

Location

– INPUT Board –

Ref. No. Location

D101 A-7

D102 A-7

D103 A-6

D104 A-4

D105 A-3

D106 A-2

D107 A-2

D108 C-6

D109 A-1

Ref. No. Location

D555 C-1

D556 C-1

D557 A-1

D561 C-1

D562 C-1

Q563 A-1

Q564 B-1

Q565 B-2

Q566 A-2

Q568 E-2

Q570 D-2

Q572 F-1

Q573 E-1

• Semiconductor

Location

– MAIN-B (R) Board –

• Semiconductor

Location

– MAIN-B (L) Board –

Ref. No. Location

D505 C-2

D506 C-2

D507 A-2

D511 C-2

D512 C-2

Q513 A-2

Q514 B-2

Q515 B-1

Q516 A-1

Q518 E-1

Q520 D-1

Q522 F-2

Q523 E-2

(Page 12)

(Page 10)

(Page 12)

(Page 10)

(Page 10) (Page 10) (Page 12)

(Page

12)

(Page

12)

TA-FA777ES

4-3. SCHEMATIC DIAGRAM – INPUT (1/2) /MAIN-B (L) /MAIN-B (R) Boards –

The components identified by mark 0or dotted

line with mark 0are critical for safety.

Replaceonlywithpart number specified.

(Page 13)

(Page 11)

(Page 13)

(Page 11)

(Page 13)

(Page 11)

(Page 13)

(Page 11)

1010

TA-FA777ES

(Page 12)

4-4. PRINTED WIRING BOARDS – BALANCE/FUNCTION SW/SPTM/HP/TONE CONTROL/PRO.LED Boards – • See page 7 for Circuit Boards Location.

• Semiconductor

Location

– BALANCE Board –

Ref. No. Location

D201 D-2

D202 D-2

D251 C-2

D252 C-2

Q206 D-3

Q207 D-2

Q208 D-2

Q209 D-3

Q256 A-2

Q257 B-2

Q258 B-2

Q259 B-2

• Semiconductor

Location

– FUNCTION SW Board –

Ref. No. Location

D914 B-3

D915 A-3

D916 A-3

D917 A-2

D918 A-2

D919 A-1

D920 B-1

• Semiconductor

Location

– SP TM Board –

Ref. No. Location

D601 C-4

D602 B-1

D603 B-3

IC601 B-2

Q601 C-1

Q602 A-1

Q603 B-1

Q604 C-1

Q605 A-2

Q606 A-2

(Page 8)

(Page 12)

SP TM

BOARD

(Page 8)

(Page 12)

(Page 8)

PRO.LED

BOARD

(Page 12)

HP BOARD

(Page 8)

(Page 12)

TONE CONTROL

BOARD

SP TM

BOARD

SP TM

BOARD

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