Sony TRINITRON KV-21M3A User manual

SERVICE
MANUAL
ВЕ-ДА
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TRINITRON « COLOR TV
SONY.

KV-21M3/21T3
ITEM MODEL | Television System Channel Coverage Colour System
e ш
a
B/G VHF: E2-E12 UHF: E21-E69
OIRT B/G, D/K D/K VHF: А01-А12 UHF: R21-R69 PAL, SECAM
Hyper : S1-841
MODEL 21M3A 21M3B 21M3D 21M3E 21M3L 21M3U
21T3A 21T3B 21T3D 21T3E 21T3L 21T3U
VHF: E2-E12, S1-S20
UHF: E21-E69, S21-S41
HYPER: 51-841
VHF: E2-E12, F2-F10, B-Q
UHF: E21-E69, F21-F69
HYPER: $1-$41
B/G/H, L
VHF: E2-E12
UHF: E21-E69
HYPER: $1-$41
VHF: E2-E12
UHF: E21-E69
HYPER: 51-541
Irish
UHF: U21-U69 VHF: A-J (Irish)
SPECIFICATIONS
Picture Tube Super Trinitron Sound output 4W (RMS)
Approx. 54.5 cm (21 inches) SW (music power)
(Approx. 51 cm picture measured Dimensions 518x474x488 mm approx.
diagonally) Weight Approx. 20 kg -
Rear/Front Terminals
Supplied accessories RM-836 Remote Commander (1)
IEC designated batteries (2)
Other features TELETEXT (for KV-21T3 models)
[REAR]
-57) 1 21-ріп Euro connector (CENELEC standard)
E Power reguirements 3V dc (2 batteries) R6 (size AA)
- Inputs for RGB Dimensions Approx. 210x45x24 mm (w/h/d)
Weight Approx. 90g
[FRONT] (Not including battery)
[RM-836]
, |
Remote
control
system
Infrared
control
Inputs
for
audio
/
video
signals
+) Video (phono jack)
Æ) Audio (phono jacks)
€ Headhpone jack - minijack
Design and specifications are subject to change without
notice.

KV-21M3/21T3
KV-21M3L
Model пате | ку.21м3А | KV-21M3B | KV-21M3D | KV-21M3E 52. KV-21T3L
KV-21T3A | KV-21T3B | KV-21T3D | KV-21T3E | уыттар | KV-21M3U
KV-21T3U
FF OFF
F OFF
И
ү
vi
Tl
Scart 1
Scart 2
FF OFF
F OFF
OFF
F OFF
OFF OFF
OFF
Tl =
о
= =
(3)
O
TI
Scart 4
гр“
о | А аз 3)21|9 21218 ој |“
T | (о
3
O
а. Ф
ee
O
т
OFF
=
TI
Language Preset
|| ess 2133
ro
A
WARNING ( KV-21M3L/21T3L/21M3U/21T3U only)
The flexible mains lead is supplied connected to a B.S. 1363 fused
plug having a fuse of 5 AMP capacity. Should the fuse need to be
replaced, use a 5 AMP FUSE approved by ASTA to BS 1362, ie
one that carries the mark.
IF THE PLUG SUPPLIED WITH THIS APPLIANCE IS NOT
SUITABLE FOR YOUR SOCKET OUTLETS IN YOUR HOME.
IT SHOULD BE CUT OFF AND AN APPROPRIATE PLUG FITTED.
THE PLUG SEVERED FROM THE MAINS LEAD MUST BE
DESTROYED AS A PLUG WITH BARED WIRES IS
DANGEROUS IF ENGAGED IN A LIVE SOCKET OUTLET.
When an alternative type of plug is used it should be fitted with a 5 AMP :
FUSE, otherwise the circuit should be protected by a 5 AMP FUSE at the
distribution board.
How to replace the fuse.
Open the fuse compartment with the
screwdriver blade
and replace the fuse.
FUSE

KV-21M3/21T3
21 pin connector ( -$^) 1)
0000000000
0000000000
Signal
Audio output B
(Right)
Audio input B
(Right)
Audio output A
(Left)
Ground (Audio)
Ground (Blue)
Audio input A
(Left)
Blue input
Ооо"
Function select
(AV control)
Ground (Green)
—
O
Open
—
Green
го
O
5
Ф
2
—
O Ground (Red)
- ~
Ground (Blanking)
Red input
—
— о о
(S signal)
croma input
Blanking input
(Ys signal)
Ground
(Video output)
Ground
"7^ (Video input)
ек Video input
ecl input
Y (S signal)
21 Common ground
(plug, sheild)
О Connected Ф Not Connected (Open)
Signal Level
Standard level : 0.5V rms
Output impedance : Less than 1k ohms*
Standard level : 0.5V rms
Output impedance : More than 10k ohms*
Standard level : 0.5V rms
Output impedance : Less than 1k ohm*
Standard level : 0.5V rms
Output impedance : Less than 10k ohm*
0.7 € 3dB, 75 ohms, positive
High state (9.5 - 12V) : Part mode
Low state (0 - 2V) : TV mode
Input impedance : More10k ohms
Input capacitance : Less than 2nF
0.7 + Зав, 75 ohms, positive
0.7 + ЗОВ, 75 ohms, positive
High state (1- ЗУ) Low state (0 - 0.4V)
Input impedance : 75 ohms
1V + ЗАВ, 75ohms,
positive sync : 0.3М (-3 + 104В)
1V + 3dB, 75ohms,
positive sync : 0.3V (-3 + 10dB)
1V + 3dB, 75ohms,
positive sync : 0.3V (-3 + 10dB)
* at 20Hz - 20kH:

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
ANODE.
WARNING Н
AN ISOLATION TRANSFORMER SHOULD BE USED DURING ANY
SERVICE TO AVOID POSSIBLE SHOCK HAZARD, BECAUSE OF
LIVE CHASSIS.
THE
CHASSIS
OF
THIS
RECEIVER
IS
DIRECTLY
CONNECTED
TO
THE AC POWER LINE.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY SHADING AND MARK А ОМ ТНЕ
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 SUPPLEMENTS
PUBLISHED BY SONY.
KV-21M3/21T3
TABLE OF CONTENTS
Section
Title
Page
Section
Title
Page
1.
GENERAL
5.
DIAGRAMS
Getting
Started,
анна
Айй
t
ШАН
7
Det
Block
Diagram
Sce
oe
s
о
e
на
TN
23
ТУ
-Operation
s
AN
im
emendet
etel
ma
M
ТЕТЕ
8
5-2.
Circuit
Boards
Location
.............................................
26
Teletext
Operation
(Only
for
KV-21T3
models)
..............
8
5-3.
Schematic
Diagrams
and
Printed
Wiring
Boards
.......
26
Menu
Орегапоп........о.
Ші.
9
TA
Boa
ея
31
Optional
Connections
................
ии,
12
cni
cn
ERN
35
Additional
Information
нина
12
0-5.
SeIDICODQUCIOIS
«cocer
cen
EH
иа
37
5-5.
IC
Block
Diagrams
нии
38
. DISASSEMBLY
2-1.
Rear
Cover
Кетоуа1...................................................
13
.
EXPLODED
VIEWS
2-2:
Service
POSIUOD
nece
redes
арии
asiat
13
ӨЗ:
ЛЕПЕС
MR
40
2-3.
Picture
Tube
Removal
ша
14
7.
ELECTRICAL
PARTS
LIST
...............................
42
. SET-UP ADJUSTMENTS
Selo
-Beam
Landing
оо
не
15
952;
И
ЫНЫ
Дың
16
3-3. Screen (G2), Drive, White Balance,
Sub
Colour
and
Sub
Brightness
..................................
18
. CIRCUIT ADJUSTMENTS
4-1.
Electrical
А4
вітепі5...........0.....00022222..2.
19
4-2.
"lest
Mode
Арына
ЫДЫ
ЫДЫ
ДЕ
20
4-3.
ВЕ-4А
Self
Diagnostic
$оЁуаге................................
22
CAUTION
ATTENTION
APRES AVOIR DECONNECTE LE CAP DE L'ANODE, COURT-
CIRCUITER L'ANODE DU TUBE CATHODIQUE ET CELUI DE
L'ANODE DU CAP AU CHASSIS METALLIQUE DE L'APPAREIL,
OU AUCOUCHE DECARBONE PEINTE SURLE TUBE CATHODIQUE
OU AU BLINDAGE DU TUBE CATHODIQUE.
ATTENTION !
AFIN D'EVITER TOUT RISQUE D'ELECTROCUTION PROVENANT
D'UN CHÁSSIS SOUS TENSION, UN TRANSFORMATEUR
D'ISOLEMENT DOIT ETRE UTILISÉ LORS DE TOUT DÉPANNAGE.
LE CHÁSSIS DE CE RÉCEPTEUR EST DIRECTEMENT RACCORDÉ
À L'ALIMENTATION SECTEUR.
ATTENTION AUX COMPOSANTS RELATIFS À LA
SÉCURITÉ!!
LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET PAR UNE
MARQUE /N SUR LES VUES EXPLOSÉES ET LES LISTES DE
PIECES SONT D'UNE IMPORTANCE CRITIQUE PUR LA SÉCURITÉ
DU FONCTIONNEMENT. NE LES REMPLACER QUE PAR DES
COMPOSANTS SONY DONT LE NUMÉRO DE PIÉCE EST INDIQUÉ
DANS LE PRÉSENT MANUEL OU DANS DES SUPPLÉMENTS
PUBLIÉS PAR SONY.

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SECTION 2
DISASSEMBLY
2-1. REAR COVER REMOVAL
“Ф (1) Five screws
(ВУТР 4x16)
2-2. SERVICE POSITION
A board
mi Зе
KV-21M3/21T3

KV-21M3/21T3
2-3. PICTURE TUBE REMOVAL
(6) Degaussing coil
(5) Spring tension
DGC holder
C board
Є
(2)
А
board
(8) Four РТ screws
(4) Deflection yoke
| |
>< MN 2
I
(9)
Picture
tube
ын
б
T
Cushion
e REMOVAL ОҒ ANODE-CAP
Note: Short circuit the anode of the picture tube and the anode cap to the metal chassis, CRT shield or carbon paint on the CRT, after removing the anode.
* REMOVING PROCEDURES.
[288]
N Anode button
(1) Turn up one side of the rubber cap in (2) Using a thumb pull up the rubber cap (3) When one side of the rubber cap is
the direction indicated by the arrow (а) firmly in the direction indicated by the separated from the anode button, the
arrow (b) anode-cap can be removed by turning
up the rubber cap and pulling it up in
the direction of the arrow (с)
e HOW TO HANDLE AN ANODE-CAP
(1) Don't damage the surface of anode-cap with sharp shaped material !
(2) Don't press the rubber hardly not to hurt inside of anode-caps !
A metal fitting called as shatter-hook terminal is built into the rubber.
(3) Don't turn the foot of rubber over hardly !
The shatter-hook terminal will stick out or damage the rubber.
14 ==

KV-21M3/21T3
SECTION 3
SET-UP
ADJUSTMENTS
e
The
following
adjustments
should
be
made
when
a
complete
Perform
the
adjustments
in
the
following
order:
realignment
is
reguired
or
a
new
picture
tube
is
installed.
1.
Beam
Landing
e
These
adjustments
should
be
performed
with
the
rated
power
supply
voltage,
unless
otherwise
noted.
2. Convergence
3. Screen (G2), Drive, White Balance, Sub Colour and
The
Contrast
and
Brightness
controls
should
be
set
as
follows
Sub
Brightness.
unless
otherwise
noted:
4.
Focus
Q
CONTRAST
control
...............
80%
Note:
Test
Equipment
Required.
(or
Normal
by
commander)
1.
Colour
bar/Pattern
Generator
ХЕ
BRIGHTNESS
control
...........
5096
2.
Degausser
3.
DC
Power
Supply
4.
Digital
multimeter
5.
Oscilloscope
Preparation:
Fig.
3-2
*
In
order
to
reduce
the
influence
of
external
magnetic
Purity
control
forces
on
the
picture
tube,
face
the
TV
set
in
an
easterly
or
westerly
direction.
e
Turn
the
power
switch
for
the
unit
ON
and
erase
the
magnetic
force
using
a
degausser.
3-1.
BEAM
LANDING
Demagnetize
with
a
degausser.
1.
Іпрш
ап
all
white
raster
signal
from
the
pattern
generator.
CONTRAST
Р
BRIGHTNESS
normal
Fig.
3-3
2.
Switch
the
raster
signal
of
the
pattern
generator
to
Red.
3.
Move
the
deflection
yoke
backward,
and
adjust
with
the
purity
control
so
that
Red
is
at
the
centre
and
the
Blue
and
Green
are
evenly
spaced
at
the
sides.
see
(Fig.
3-1
- 3-3)
4.
Move
the
deflection
yoke
forward,
and
adjust
so
that
the
entire
screen
becomes
Red.
(Fig.
3-1)
Fig.
3-4
5. Switch the raster signal to Blue and then Green to confirm
the condition.
6. When the position of the deflection yoke has been
determined, tighten it with the deflection yoke mounting
SCICW.
7. When the landing at the corners is not correct, adjust by
using disk magnets. (Fig. 3-4)
Disk magnets or
rotatable disk
magnets correct
these areas (a-d).
V
Deflection yoke positioning
corrects these areas.
29655

KV-21M3/21T3
3-2. CONVERGENCE
3.
When
the
V.STAT
magnet
is
moved
in
the
direction
of
arrows,
the
Red,
Green
and
Blue
Preparation:
Before starting, perform FOCUS, H.SIZE, and V.SIZE
adjustments.
Set the BRIGHTNESS control to minimum.
the (а) and (b)
dots move as shown below.
e
Іпрша
dot
pattern
from
the
pattern
generator.
9)
В
ШГ
Е.
(1)
Horizontal
and
Vertical
Static
Convergence
Е
Centre dot
H.STAT
Control
V.STAT Magnet
C Board
Blue
dots
at
the
centre
of
the
screen.
(Vertical
movement)
If the horizontal dots cannot coincide with variable range of
the
H.STAT
convergence,
adjust
together
with
the
V.STAT
convergence while tracking.
(Adjustthe
convergence
by
tilting
the
V.STAT
convergence
or
by
opening
or
closing
the
V.STAT
convergence.)
If
the
Red
and
Blue
dots
do
not
converge
with
the
Green
dots, perform the following steps.
1.
Move
the
BMC
magnet
(a)
to
correct
for
insufficient
H.static
convergence.
Ге
BORSE
р
ше
KC
2.
Rotate
the
BMC
magnet
(b)
to
correct
for
insufficient
Blue
dots
at
the
centre
of
the
screen.
(Horizontal
movement)
онто
е
2.
Adjustthe
V.STAT
magnet
to
converge
ће
Red,
Green
and
:
5
In
either
case,
repeat
the
Beam
Landing
Adjustment.
BMC magnet
--46-

(2) Dynamic Convergence Adjustment
Preparation:
•
Before
starting
to
perform
the
Horizontal
and
Vertical
static
convergence
adjustment.
1. Slightly loosen the deflection yoke screw.
2. Remove the deflection yoke spacers.
KV-21M3/21T3
Move the deflection yoke for best convergence as shown
below.
Tighten the deflection yoke screw.
Install the deflection yoke spacers.
(3) Screen-corner Convergence.
a-d:
screen-corner
convergence defect
= ir a
Affix a Permalloy ass'y
corresponding to the
misconverged areas
Permalloy assembly

KV-21M3/21T3
3-3. SCREEN(G2), DRIVE, WHITEBALANCE,
SUB COLOUR and SUB BRIGHTNESS.
SCREEN
Screen (G2) setting
l.
oS аа
Input a 0 IRE (Black Level) signal from the pattern
generator.
Enter into the Service Mode "Test" "Test" and 38.
Adjust SCREEN VR until the Down arrow is displayed.
Adjust SCREEN VR until the Down arrow just disappears.
Press the TV Button on the Remote Commander to store
the data.
Drive Level
==
гә
PUN O
Input a Video signal containing a small area of 100%
white on a black background.
Connect an oscilloscope to Pin 10 ofJ701 (R OUT)
on the C Board.
Set the Picture to maximum using "Test" Test" and 01.
Enter into the Service mode (Adjust Menu).
Using the Blue and Green buttons select "RED HWB".
Using the Red and Yellow buttons on the Remote
Commander adjust until the oscilloscope waveform has
an amplitude of 85V.
85V
White Balance Adjustment
1.
2.
3.
4.
Input an all white pattern from the pattern generator.
Adjust the Colour and Brightness controls to the standard
level.
Enter into the Service Mode.
Adjust the Green HWB and Blue HWB so that the
White Balance becomes optimum.
Sub Colour Adjustment
1. Inputa PAL colour bar pattern from the pattern generator.
2. Connect an oscilloscope to Pin 8 of J701 (B OUT)
on the C Board.
3. Enter into the Service Mode "Тез! "Test" and 22.
4. Using the Red and Yellow buttons on the Remote
Commander adjust until the oscilloscope waveform
becomes as follows :
=
"— 9 SAME LEVEL
B. OUT
Note : If the TV is able to receive PAL and SECAM
transmissions, repeat the above procedure using a Secam
colour bar signal.
Sub Brightness Adjustment
1. Input a Philips pattern from the pattern generator.
2. Enter into the Service Mode "Test" "Test" and 23.
3. Using the Red and Yellow buttons on the Remote
Commander adjust unti] the 0 IRE of the grey scale and the
cut off are only slightly visible on the screen.
3-4. FOCUS
1. Receive a television broadcasting.
2. Normalize the picture setting.
3. Adjust the focus control on the flyback transformer to
become the focus in the centre area properly.
Bring only the centre area of the screen into focus, the
magenta-ring appears on the screen. In this case, adjust the
focus to optimize the screen uniformly.
Focus
--18--

KV-21M3/21T3
SECTION 4
CIRCUIT ADJUSTMENTS
4-1. ELECTRICAL ADJUSTMENTS
Service adjustment to this model can be performed
with the supplied Remote Control Commander RM-836.
HOW TO ENTER INTO SERVICE MODE
1. Turnon the main power of the set and enter into
stand-by mode.
2. Press the following sequence of buttons on the Remote
Control Commander.
<
| Бер + ј=[О)
(ОМ БСВЕЕМ (DIGIT 5) (VOLUME 4-) (TV)
DISPLAY)
"TT-- " will appear in the top right corner of the screen
Other status information will also be displayed.
3. Press the MENU button on the Remote Commander to
obtain the menu on the screen.
V1 .00-01
SONY BE-4A
Software version
4. Press the Blue (Next) or Green (previous) buttons to
select the adjustment item from the table.
5. Press the Yellow (+) or Red (-) buttons to change the data
as required.
6. Turn off the power to quit the service mode when
adjustments are completed.
Range of adjustments available from the on screen menu
system.
Г Sa | Range -
BG-L, BG-DK
UK, Eire, BG
Select EAST/WEST
A
A
16:9 OFF
System
(D ><
e
| Select |
| Ай | 00.
| ^d | 00-63 —
| Ad | ое —
| 00 | 0-6 |
БЕСІН
КЕ
Ай |
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с | =
ЧЕ
ш
<
Аас
PLL
Ver, Breath
Par, Tilt
V, Linear
Сю | €
Corn, corr
V, Cen or EW
V, Position
H, Centre
Blue HWB
Green HWB
ај
ај
Адј -
Адј -
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d
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© ду
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= 3
5 5
ВН, 09:

KV-21M3/21T3
4-2. TEST MODE 2:
TT
--
Mode
is
available
by
pressing
the
Test
button
twice,
O.S.D
'TT
--'
appears.
The
functions
described
below
are
availal
by
pressing
two
digits.
To
release
the
"TT
--
mode,
press
0
twice,
press
‘TEST’
,
press
"ТУ!
or
switch
the
TV
into
Stand-by
ЕСЕСІ ШІСІ
3
0 Set volume to 3596 of maximum
04 | Set volume to 5096 of maximum
05 | Set volume to 65% of maximum
06 | Set volume to 8096 of maximum
07 | Enable Ageing condition |
08 | Set TV shipping conditions
wfo
зина or ве поль з
Select interlaced ог non-interlaced teletext display
15 Copy the software deafult setting to the last power
memory
КОСУ СМ
No function
17 | Enable or Disable the sharpness adjust feature
18 Enable or disable the teletext operation
(SSA5291 only)
19 | Enable or Disable the NTSC reception facility
20 | No function
Sub Picture Adjustment
21
22 Sub Colour Adjustment (different stored locations for
PAL & SECAM)
СТТН
27 | Enable tuning for system ! (VHF-L, VHF-H & ОНР)
28 | Enable tuning for system B/G
5 Sub brightness adjustment with picture at absolute
zero
Adjust the teletext & OSD Horizontal position
(SSA5296 & SSA5498 only)
3 No function
3
3
2
Perform auto PLL adjustment
DL EN
36
37 | Set Vertical size minimum and go to ZOOM1 mode
38
ЕЗ Enter G2 factory adjustment mode
Restore Vertical size and go to ZOOM3 mode
| 40 | No function
41* | Write all default data to the NVM
Ер No function
ЕЗ Write default geometry data to the NVM
No function
No function
No function
42*
43*
44*
45*
46"
ЕЗ Write the NVM test byte as 44(hex)
Note
:
*=
Programme
number
must
be
set
to
59
in
order
to
apply
these
functions
— 20 —