Sony TA-FB720R / TA-FB820R Service Manual ▷ View online
– 21 –
– 22 –
TA-FB720R/FB820R
3-9. PRINTED WIRING BOARD – POWER SECTION –
• See page 5 for Circuit Boards Location.
(Page 14)
(Page 13)
– 23 –
– 24 –
3-11. IC PIN FUNCTION
• IC902 Input Control & LED Drive (TMP47C103N-JP47)
O
I
I
I
O
O
I
I
I
I
O
O
O
—
O
O
O
O
O
I
I
I
O
O
O
O
I
—
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
X OUT
X IN
RESET
PMD
VOL +
VOL –
SW 0
SW 1
SW 2
EON
PHONO
TUNER
CD
GND
AUX
MD/DAT
TAPE
MON
PRY
PKY
MOI
SIRCS
MUTE
SCE
SDT
SCK
STOP
+3V
System clock (4MHz)
Reset input
Mode select input
Motor drive output (+)
Motor drive output (–)
Rotary switch input (CD)
Rotary switch input (TUNER)
Rotary switch input (PHONO)
EON signal input
PHONO LED drive output
TUNER LED drive output
CD LED drive output
Ground
AUX LED drive output
TAPE “2” LED drive output
TAPE “1” LED drive output
MONITOR output
Power relay output
Power key input
MONITOR input
SIRCS input
Muting output
Chip enble output
Serial data output
Serial clock output
STOP input
+3V Power supply
I/O
Function
Pin No.
Pin Name
3-10. IC BLOCK DIAGRAMS
• Main section
IC700 uPC1237HA
1
2
3
4
5
6
7
8
OVER LOAD DET
F/F
OFFSET DET
LATCH/
AUTORESET
V
CC
ON
MUTE
AC OFF
DET
V
CC
• Panel section
IC901 BA6208
1
2
3
4
5
6
7
8
9
NC
OUTPUT 2
Vcc
GND
NC
INPUT 2
INPUT 1
NC
MOTOR
DRIVE
MOTOR
DRIVE
REG
SWITCH
SWITCH
OUTPUT1
• Input section
IC101 LC7821
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
CONTROL
LATCH
SHIFT RESISTER
LEVEL SHIFT
CL
DI
CE
VEE
L COM3
L7
L COM2
L5
L4
L2
VSS
S
RES
VDD
R COM3
R8
R7
R COM2
R6
R4
R2
R5
R COM1
R3
R1
L3
L1
L COM1
L6
L8
BUFFER
– 25 –
SECTION 4
EXPLODED VIEW
NOTE:
• Items marked “*” are not stocked since they are
seldom required for routine service. Some delay
should be anticipated when ordering these items.
should be anticipated when ordering these items.
• The mechanical parts with no reference number in
the exploded views are not supplied.
• Hardware (# mark) list and accessories and packing
materials are given in the last of this parts list.
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
The components identified by
mark ! or dotted line with mark
! are critical for safety.
Replace only with part number
specified.
mark ! or dotted line with mark
! are critical for safety.
Replace only with part number
specified.
4-1. CASE AND BACK PANEL SECTION
* 10
3-703-244-00 BUSHING (2104), CORD
!
11
1-777-185-11 CORD, POWER
* 12
1-669-476-11 OUTLET BOARD
13
3-710-901-11 SCREW, TAPPING
14
4-947-010-01 SCREW, FEEDER FIXED
15
3-704-515-41 SCREW (BV/RING)
!
CNJ3
1-526-794-11 OUTLET, AC
!
CNJ4
1-526-794-11 OUTLET, AC
1
X-4949-780-1 KNOB (SELECTOR) ASSY
2
X-4949-781-1 KNOB (VOLUME) ASSY
* 4
4-999-439-01 CASE (413235)
5
X-4949-760-1 FOOT ASSY
6
4-970-124-01 CUSHION (F50180S)
* 7
A-4407-621-A PHONO BOARD, COMPLETE (FB720R)
* 7
A-4407-640-A PHONO BOARD, COMPLETE (FB820R)
8
4-967-961-01 SCREW (3X8)
* 9
4-999-451-11 PANEL, BACK (FB820R)
* 9
4-999-451-21 PANEL, BACK (FB720R)
13
13
12
11
10
9
CNJ3
CNJ4
15
14
15
15
8
4
13
13
7
8
6
5
#2
not
supplied
supplied
not
supplied
supplied
#2
5
6
1
2
– 26 –
4-2. FRONT PANEL SECTION
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
* 62
1-670-220-11 SIRCS SUB BOARD
* 63
1-669-497-11 SIRCS BOARD
* 65
1-669-494-11 SP-SW BOARD
* 66
A-4407-623-A PANEL BOARD, COMPLETE (FB720R)
* 66
A-4407-632-A PANEL BOARD, COMPLETE (FB820R)
* 67
1-669-496-11 VOL BOARD
68
4-950-189-01 KNOB (A) (VOL)
69
4-970-146-01 BUTTON
70
4-980-189-01 KNOB (DIA. 6)
71
4-999-420-01 ESCUTCHEON (TONE)
* 72
1-669-498-11 HP BOARD
!
S1
1-554-920-61 SWITCH, PUSH (AC POWER)(1 KEY)(U)
51
4-942-568-41 EMBLEM (NO.5), SONY
52
4-965-651-01 EMBLEM (MOS)
53
4-967-961-01 SCREW (3X8)
54
4-999-415-01 PANEL, FRONT (FB820R)
54
4-999-415-11 PANEL, FRONT (FB720R)
55
4-999-413-01 INDICATOR (PROTECTION)
56
4-980-776-01 WINDOW, REMOTE CONTROL
* 57
4-999-418-01 INDICATOR (SELECTOR)
58
4-999-416-01 BASE (L), PANEL
59
4-999-417-01 BASE (R), PANEL
60
4-999-419-01 KNOB (D23)
61
3-024-055-01 BUTTON (POWER)
The components identified by mark ! or dotted
line with mark ! are critical for safety.
Replace only with part number specified.
line with mark ! are critical for safety.
Replace only with part number specified.
51
52
53
53
53
53
54
55
57
71
55
68
53
53
53
60
61
53
72
53
53
69
70
67
53
53
S1
not supplied
not supplied
Supplied
with J801
with J801
Supplied
with RV300,
S902,S903
with RV300,
S902,S903
Supplied with
RV301,RV302,
RV303,S801
RV301,RV302,
RV303,S801
53
63
62
66
65
58
59
53
56
Click on the first or last page to see other TA-FB720R / TA-FB820R service manuals if exist.