Sony KV-VF21M40 Service Manual ▷ View online
SERVICE MANUAL
CHASSIS
BC-4A
MODEL
COMMANDER
DEST. CHASSIS NO.
MODEL
COMMANDER
DEST. CHASSIS NO.
KV-VF21M40
RM-956
E
SCC-P10A-A
KV-VF21M70
RM-956
ME
SCC-P11A-A
KV-VF21M70
RM-956
JE
SCC-P12A-A
KV-VF21M70
RM-956
HK
SCC-P09B-A
KV-VF21M77
RM-955
HK
SCC-P09A-A
21
∗
Please file according to model size. ....
TRINITRON
®
COLOR VIDEO TV
COUNTER RESET
t
MENU
REW
A/B
EJECT
TIMER REC
G-CODE
ON/OFF
TAPE SPEED
INDEX
z
REC
GAME
2
PROGR
1
6
7
0
C
9
4
3
2
5
8
X
PAUSE
x
STOP
m
FF
M
Z
.
>
PLAY
ENTER
PIC MODE
-/--
H
COUNTER RESET
t
MENU
REW
EJECT
TIMER REC
G-CODE
ON/OFF
TAPE SPEED
INDEX
z
REC
GAME
2
PROGR
1
6
7
0
C
9
4
3
2
5
8
X
PAUSE
x
STOP
m
FF
M
Z
.
>
PLAY
ENTER
PIC MODE
-/--
H
RM-955
RM-956
PAL NTSC
(VF21M77 ONLY)
®
– 2 –
SPECIFICATIONS
TV Section
Television system
Television system
B/G, I, D/K, M
Color system
PAL/SECAM and
NTSC
NTSC
3.58
/NTSC
4.43
Bilingual system
NICAM bilingual I
(VF21M77 ONLY)
Channel coverage
Channel coverage
See “Receivable
channels and channel
display”
channels and channel
display”
Picture tube
Trinitron
21 inches (approx. 50.7
cm measured
diagonally)
21 inches (approx. 50.7
cm measured
diagonally)
Antenna in
75-ohm antenna socket
for VHF/UHF
for VHF/UHF
Video Section
Format
Format
VHS standard
Video recording system
Rotary 2-head helical
scanning system
scanning system
Audio recording system
Monaural
Video signal
PAL/MESECAM/
NTSC
NTSC
Tape speed
PAL/MESECAM
SP: 23.39 mm/sec.
LP: 11.70 mm/sec.
NTSC
SP: 33.35 mm/sec.
EP: 11.11 mm/sec.
SP: 23.39 mm/sec.
LP: 11.70 mm/sec.
NTSC
SP: 33.35 mm/sec.
EP: 11.11 mm/sec.
Maximum recording time
PAL/MESECAM
SP: 240 minutes with
E-240
LP: 480 minutes with
E-240
NTSC
SP: 180 minutes with
T-180
EP: 540 minutes with
T-180
SP: 240 minutes with
E-240
LP: 480 minutes with
E-240
NTSC
SP: 180 minutes with
T-180
EP: 540 minutes with
T-180
Inputs and Outputs
Inputs
Inputs
t1, t2/GAME IN
(video): phono jack
1 Vp-p, 75 ohms,
unbalanced,
sync negative
unbalanced,
sync negative
9 (audio): phono jack
Input level:
500 mVrms
500 mVrms
Headphones jack
Minijack
General
Clock
Clock
Quartz locked
Power requirements 110-240 V AC, 50/60Hz
Power consumption 123 W
Operating temperature
Power consumption 123 W
Operating temperature
5˚ C to 40˚ C
(41˚ F to 104˚ F)
Storage temperature –20˚ C to 60˚ C
(–4˚ F to 140˚ F)
Dimensions
489 x 500 x 485 mm
(19
(19
3
/
8
x 19
3
/
4
x 19
1
/
8
inches)
Mass
27.5 kg (60 lb 10 oz.)
Supplied accessories
Remote control
Two R6 (size AA)
Two R6 (size AA)
batteries
Stabilizer band
Two clamps
Two wood screws
AC plug adaptor
Two clamps
Two wood screws
AC plug adaptor
(E/ME/JE model)
These operating
instructions
Design and specifications are subject to
change without notice.
change without notice.
– 3 –
Receivable channels and channel display
System
Area
Channel coverage
Channel display
B/G, H
Middle East/Asia
E-2 to E-12
C02 to C12
E-21 to E-69
C21 to C69
Indonesia
1A
C01
2 to 11
C03 to C12
Morocco
M-4 to M-7
C70 to C73
M-8 to M-10
C08 to C10
CATV
S-01 to S-05
S42 to S46
S-1 to S-41
S01 to S41
I
Hong Kong/
B-21 to B-69
C21 to C69
United Kingdom
Ireland
A, B, C,....J
C01 to C10
South Africa
4 to 13
C04 to C13
21 to 68
C21 to C68
Angola
1
C00
2 to 3
C02 to C03
CATV
S-01 to S-05
S42 to S46
S-1 to S41
S01 to S41
D/K, K1
East European
R-1 to R-12
C01 to C12
coutries
R-21 to R-60
C21 to C60
China
C-1
C01
C-2
C02
C-3
C13
C-4
C03
C-5
C04
C-6
C14
C-7 to C-12
C06 to C11
C-13 to C-24
C21 to C32
C-25 to C-47
C38 to C60
C-48 to C-57
C61 to C70
Ivory Coast
1 to 3
C71 to C73
CATV
S-1 to S-39
S01 to S39
M
America
A-2 to A-13
C02 to C13
A-14 to A-69
C14 to C69
CATV
A-8
S01
A-7
S05
A-6
S06
A-5 to A-1
S95 to S99
A to E
S14 to S18
F to W+28
S19 to S64
W+29 to W+58
S65 to S94
– 4 –
TABLE OF CONTENTS
Section
Title
Page
Section
Title
Page
SELF DIAGNOSIS FUNCTION
......................................
5
[ TV SECTION]
1. GENERAL
1. GENERAL
1-1.
KV-VF21M40/VF21M70 ........................................
8
1-2.
KV-VF21M77 ......................................................... 35
2. DISASSEMBLY
2-1.
Rear Cover Removal ............................................... 65
2-2.
Chassis Assy Removal ............................................ 65
2-3.
Service Position (A Board) ..................................... 65
2-4.
A Board Removal .................................................... 65
2-5.
Harnes Location ...................................................... 66
2-6.
Picture Tube Removal ............................................. 67
3. SET-UP ADJUSTMENTS
3-1.
Beam Landing ......................................................... 68
3-2.
Convergence ............................................................ 69
3-3.
Focus Adjustment .................................................... 70
3-4.
Screen (G2) Adjustment .......................................... 70
3-5.
White Barance Adjustment ..................................... 71
3-6.
Picture Distortion Adjustment ................................. 71
4. SAFETY RELATED ADJUSTMENT
...................... 72
CAUTION
SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND
THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR
CARBON PAINTED ON THE CRT, AFTER REMOVING THE AN-
ODE.
THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR
CARBON PAINTED ON THE CRT, AFTER REMOVING THE AN-
ODE.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK
!
ON
THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS AND IN THE
PARTS LIST ARE CRITICAL FOR SAFE OPERATION. REPLACE
THESE COMPONENTS WITH SONY PARTS WHOSE PART
NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUP-
PLEMENTS PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS
THAT ARE CRITICAL FOR SAFE OPERATION ARE IDENTIFIED
IN THIS MANUAL. FOLLOW THESE PROCEDURES WHEN-
EVER CRITICAL COMPONENTS ARE REPLACED OR IM-
PROPER OPERATION IS SUSPECTED.
PARTS LIST ARE CRITICAL FOR SAFE OPERATION. REPLACE
THESE COMPONENTS WITH SONY PARTS WHOSE PART
NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUP-
PLEMENTS PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS
THAT ARE CRITICAL FOR SAFE OPERATION ARE IDENTIFIED
IN THIS MANUAL. FOLLOW THESE PROCEDURES WHEN-
EVER CRITICAL COMPONENTS ARE REPLACED OR IM-
PROPER OPERATION IS SUSPECTED.
5. CIRCUIT ADJUSTMENTS
5-1.
Adjustments with Commander ................................ 73
5-2.
Adjustment Method ................................................. 74
5-3.
Service Data ............................................................ 75
5-4.
A Board Adjustment ................................................ 77
6. DIAGRAMS
6-1.
Block Diagrams ....................................................... 79
6-2.
Circuit Boards Location .......................................... 83
6-3.
Printed Wiring Boards and Schematic Diagrams .... 83
•
A Board .................................................................... 84
•
CV, F Boards ............................................................ 91
6. EXPLODED VIEWS
6-1.
Picture Tube ............................................................ 124
6-2.
Chassis ..................................................................... 125
7. ELECTRICAL PARTS LIST
...................................... 129
[ VIDEO SECTION]
1. GENERAL
1. GENERAL
....................................................................... 96
2. DISASSEMBLY
............................................................. 97
3. CIRCUIT ADJUSTMENTS
........................................ 98
4. INTERFACE, IC PIN FUNCTION
DESCRIPTION
.............................................................. 101
5. DIAGRAMS
..................................................................... 105
6. EXPLODED VIEWS
..................................................... 126
7. ELECTRICAL PARTS LIST
...................................... 135