Sony TA-FA777ES User manual

MICROFILM
SERVICE MANUAL
INTEGRATED STEREO AMPLIFIER
AEP Model
SPECIFICATIONS
TA-FA777ES

2
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.

3
SECTION 1
GENERAL This section is extracted from
instruction manual.
LOCATION OF CONTROLS

4
FRONT PANEL, TOP board, BOTTOM board
SUB CHASSIS, FUN-SW BOARD
Note: Follow the disassembly procedure in the numerical order given.
SECTION 2
DISASSEMBLY
8 three screws
(BV 3
× 8)
0 two screws
(B 4
× 20)
qs three screws
(BV 3
× 8)
0 three screws
(B 4
× 20)
qa three foots
qs five screw
s
(BV 3 × 8)
qd bottom board
1 four screws
(FLAT HEAD)
1 four screws
(FLAT HEAD)
2 top board
qa two foots
7 two screws
(BV 3
× 8)
9 front panel
6 knob (DIA.68)
5 screw
3 screw
4 knob (DIA.48)
5 sub chassis
1 two screws
(BV 3 × 8)
2 shield plate
1 four screws
(BV 3 × 8)
qd rotary switch
(remote type)
4 four screws
(BV 3 × 8)
qg FUN-SW board
4 two screws
(BV 3 × 8)
qf nut
qa light interception sheet (B)
0 knob (DIA.29)
4 four screws
(BV 3 × 8)
4 screw
(BV 3 × 8)
7 power botton
assy
8 two screws
( 3 × 6)
9 switch, push
(AC power)
3 connector
(CN806)
6 two connectors
(CN807, 808)
qh connector
(CN304)
qs nut

5
HEAT SINK (L) / (R) ASSY
MAIN A board, PS-PRE board
4 three connectors
(CN501, 502, 503)
3 heat sink (L) assy
2 two screws
(4 × 8)
2 two screws
(4 × 8)
5 heat sink (R) assy
6 three connectors
(CN551, 552, 553
)
1 two screws
(4 × 8)
1 two screws
(4 × 8)
2 three screws
(BV 3
× 8)
1 two screws
(3
× 8)
4 rod
MAIN A board
8 three connectors
(CN203, 204, 205)
3 two screws
(BV 3
× 8)
7 four connectors
(CN401, 402, 403, 404)
6 three connectors
(CN51, 52, 53)
PS-PRE board
9 Chassis (I)
5 four connectors
(CN802, 803, 804, 805)

6
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
1
3L-CH
RT551
CN554
1
3
R-CH

77
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.
B
These are omitted.
CE
Q
B
These are omitted.
CE
Q
• 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

88
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 12)
(Page 10)
(Page 12)
(Page 12)
(Page 10)
(Page 10)
(Page 10)
(Page 10)
(Page 10) (Page 10) (Page 12)
(Page
12)
(Page
12)

99
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 13)
(Page 11)
(Page 13)
(Page 13)
(Page 13)
(Page 11)
(Page 13)
(Page 11)
(Page 11)
(Page 13)
(Page 13)
(Page 11)

1010
TA-FA777ES
(Page 12)
(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)
TO
SP TM
BOARD
(Page 8)
(Page 12)
(Page 8)
(Page 8)
(Page 8)
(Page 8)
TO
PRO.LED
BOARD
(Page 12)
(Page 12)
TO
HP BOARD
(Page 8)
(Page 12)
TO
TONE CONTROL
BOARD
TO
SP TM
BOARD
TO
SP TM
BOARD