Sony TA-FA777ES Service Manual ▷ View online
5
HEAT SINK (L) / (R) ASSY
MAIN A board, PS-PRE board
4
three connectors
(CN501, 502, 503)
(CN501, 502, 503)
3
heat sink (L) assy
2
two screws
(4
(4
×
8)
2
two screws
(4
(4
×
8)
5
heat sink (R) assy
6
three connectors
(CN551, 552, 553)
(CN551, 552, 553)
1
two screws
(4
(4
×
8)
1
two screws
(4
(4
×
8)
2
three screws
(BV 3
(BV 3
×
8)
1
two screws
(3
(3
×
8)
4
rod
MAIN A board
8
three connectors
(CN203, 204, 205)
(CN203, 204, 205)
3
two screws
(BV 3
(BV 3
×
8)
7
four connectors
(CN401, 402, 403, 404)
(CN401, 402, 403, 404)
6
three connectors
(CN51, 52, 53)
(CN51, 52, 53)
PS-PRE board
9
Chassis (I)
5
four connectors
(CN802, 803, 804, 805)
(CN802, 803, 804, 805)
6
Note:
Adjustment should be performed 5 minutes later, after the power
switch is on.
switch is on.
Bias Adjustment
Setting:
ATTENUATOR (Volume) control: minimum
Input signal: No signal input
Input signal: No signal input
Procedure:
Adjust RT501 (L-CH) and RT551 (R-CH) for 70 mV reading on
the VTVM.
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
3
L-CH
RT551
CN554
1
3
R-CH
7
7
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
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W 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
no mark: POWER ON
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Signal path.
I
: PHONO
NOTE: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
B
These are omitted.
C
E
Q
B
These are omitted.
C
E
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
8
8
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)
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