Sony KV-28WS4A Service Manual ▷ View online
— 50 —
KV-28WS4
Note :
•
All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50WV or less are not indicated except for electrolytic and
tantalums.
tantalums.
•
All resistors are in ohms.
k = 1000 , M = 1000K
k = 1000 , M = 1000K
•
Indication of resistance, which does not have one for rating
electrical power, is as follows.
electrical power, is as follows.
Pitch : 5 mm
Rating electrical power W
Rating electrical power W
•
: nonflammable resistor.
•
: internal component.
•
: panel designation, or adjustment for repair.
•
All variable and adjustable resistors have characteristic curve
B, unless otherwise noted.
B, unless otherwise noted.
•
: earth - ground.
•
: earth - chassis.
•
: no mounted.
5-2. CIRCUIT BOARDS LOCATION
1
4
/
Reference information
RESISTOR
: RN
METAL FILM
: RC
SOLID
: FPRD
NONFLAMMABLE CARBON
: FUSE
NONFLAMMABLE FUSIBLE
: RS
NONFLAMMABLE METAL OXIDE
: RB
NONFLAMMABLE CEMENT
: RW
NONFLAMMABLE WIREWOUND
:
ADJUSTABLE RESISTOR
COIL
: LF-8L
MICRO INDUCTOR
CAPACITOR
: TA
TANTALUM
: PS
STYROL
: PP
POLYPROPYLENE
: PT
MYLAR
: MPS
METALIZED POLYESTER
: MPP
METALIZED POLYPROPYLENE
: ALB
BIPOLAR
: ALT
HIGH TEMPERATURE
: ALR
HIGH RIPPLE
5-3. SCHEMATIC DIAGRAMS AND PRINTED WIRING BOARDS
Note : The components identified by shading and marked
are critical for safety. Replace only with the
part number specified.
part number specified.
Note : Les composants identifies par une trame et une
marque sont critiques pour la securite.
Ne les remplacer que par une piece portant le
numero specifie.
Ne les remplacer que par une piece portant le
numero specifie.
•
Readings are taken with a colour-bar signal input.
•
Readings are taken with 10M
Ω
digital multimeter.
•
Voltages are dc with respect to ground unless otherwise noted.
•
Voltage variations may be noted due to normal production
tolerances.
tolerances.
•
All voltages are in V.
•
Circled numbers are waveform references.
•
: B+ bus.
•
: signal path. (RF)
VM
C
Q
T K
J1
B
A
G
D
KV-28WS4
— 105 —
5-4. SEMICONDUCTORS
( TOP VIEW )
1
4
8
5
8
7
6
5
1
3
4
2
BA7046F
BA7046F-T1
MB3793-42PNF
MB3793-42PNF-ER
NJM2240M
NJM2240(TE2)
BA7046F-T1
MB3793-42PNF
MB3793-42PNF-ER
NJM2240M
NJM2240(TE2)
( MARKING SIDE VIEW )
CXD2044Q
SAA4990H/V2
SAA4990H/V2
64
41
1
24
80
65
25
40
P83C654EBA/560
SDA9280A41
SDA9280A41
SAA4952WP/V1
MB814400C-70PJN-ER
( TOP VIEW )
1
10
20
11
( TOP VIEW )
6
40
1 44
18
28
7
17
29
39
CXD8626Q
LM393P
M5216P
ST24C16FB6
TDA2822M
UPC393C
M5216P
ST24C16FB6
TDA2822M
UPC393C
LM2940CT-9.0
LM2940T-8.0
L4941BV
TEA7605
LM2940T-8.0
L4941BV
TEA7605
CXD8624Q
MSP3400C-PS-C6-T
MSP3410B-PS-F7-T-ND
SAA7185WP
SDA30C164-GEG
SDA5273P-C26-GEG
SDA5275
MSP3410B-PS-F7-T-ND
SAA7185WP
SDA30C164-GEG
SDA5273P-C26-GEG
SDA5275
LM78L05ACZ
LM78L12ACZ
L78L05ACZ-AP
L78L12ACZ-AP
LM78L12ACZ
L78L05ACZ-AP
L78L12ACZ-AP
SDA9361
M27C4001-15C1-AE401
MC74F240DWR2
( TOP VIEW )
36
1
12
48
25
13
24
37
CXA1855Q-T6
( TOP VIEW )
1
8
16
9
CXA1875AM-T4
HEF4053BT
MC14052BDR2
MC74F157ADR2
SN74LS33INS
74HCT4046AD
HEF4053BT
MC14052BDR2
MC74F157ADR2
SN74LS33INS
74HCT4046AD
28
15
1
14
( TOP VIEW )
CXD2053S
TDA4780/V3
TDA4780/V3
41
80
81
120
121
160
1
40
(TOP VIEW)
1
30
31
60
61
90
91
120
CXD8625Q
( TOP VIEW )
INDEX
( TOP VIEW )
1
30
31
50
51
80
81
100
IN
GND
OUT
26
14
1
13
INDEX
( TOP VIEW )
68
61
60
1
52
44
43
35
27
26
18
10
9
( TOP VIEW )
( TOP VIEW )
1 32
30
21
29
4
5
20
14
1
2
3
4
PC123F2
PC123FY2
PC123FY2
1
1 : V IN
2 : V OUT
3 : GND
4 : ON/OFF CONTROL
2 : V OUT
3 : GND
4 : ON/OFF CONTROL
2
3
4
PQ05RF21
SBX1981-51
( TOP VIEW )
51
35
1
17
68
52
18
34
1
11
12
22
23
33
34
44
IN
GND
OUT
Click on the first or last page to see other KV-28WS4A service manuals if exist.