Sony TA-FB940R Service Manual ▷ View online
5
5
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.)
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
• 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.
•
f
: internal component.
• 2 : nonflammable resistor.
• 5 : fusible resistor.
• C : panel designation.
• 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.
• 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
• 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
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.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: TUNER
• Abbreviation
G
: German model.
EE
: East European model.
AUS
: Australian model.
SP
: Singapore model.
MY
: Malaysia model.
WAVEFORM
1
IC902 1 XOUT
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
Replace only with part number specified.
• Indication of transistor
C
These are omitted
E
B
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)
(EXCEPT UK, SP, MY)
VOL board
SIRCS board
SIRCS SUB board
HP board
S-D LED board
6
6
TA-FB940R
3-2. SCHEMATIC DIAGRAM – INPUT SECTION –
(Page 8)
(Page 10)
(Page 10)
C101 – 105, 201 – 205
EXCEPT UK, SP, MY
EXCEPT UK, SP, MY
SACD/CD
470
16V
16V
470
16V
16V
2SB1640
22
25V
22
25V
2SD2525
10
63V
10
63V
R240
82
1W
R140
82
1W
+15V
–15V
–B
+B
GND
EXCEPT UK, SP, MY
EXCEPT UK, SP, MY
UK, SP, MY
MODEL
MODEL
JW12
UK, SP, MY
MODEL
MODEL
JW11
16V
16V
*
*
*
*
*
*
*
*
*
*
*
0
0
7
7
TA-FB940R
3-3. PRINTED WIRING BOARD – INPUT SECTION – • See page 5 for Circuit Boards Location.
Ref. No.
Location
• Semiconductor
Location
(INPUT Board)
(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)
(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
EXCEPT UK, SP, MY
8
8
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
R533, 534, 633, 634
EXCEPT UK, SP, MY
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