Sony TRINITRON KV-M1450A User manual

SERVICE
MANUAL
oo
| MODEL COMM.
KV-M1450A ™*
KV-M1451A
KV-M1450B ™*
KV-M1451B
—KV-M1450D “=
KVMI451D
SIS NO. MODEL
COMMANDER _ DEST. CHASSIS NO.
Italian SCC-H64E-A K |/- M | 4 5 0 E FIM-836 Spanish SCC-H66C-A
Italian SCC-H64D-A kK |/- M 1 4 5 1 E oes Spanish SCC-H66D-A .
French
SCC-H65C-A
kK
|/-
M
|
4
5
0
kK
RM-836
OIRT
SCC-H52E-A
French — SCC-H65D-A kK \/- M 7 4 5 1 kK RM-836 OIRT SCC-H52D-A
SCC-H46E-A
kK
|/-
M
|
4
5
0
U
RM-836
UK
SCC-H50D-A
AEP SCC-H46D-A K \/- M 1 4 5 1 U RM-836 UK SCC-H50C-A
eer
TRINITRON . COLOR TV
SONY.

KV-M145
ITEM MODEL Television System Channel Coverage Color System
VHF: E2-E12, $1-S20
Italian B/G/H UHF: E21-E69 PAL
i
VHF: £2-E12, $1-S20, F2-F10, B-Q
Breach Baie UHF: E21-£69, $21-S41, F21-Fe9 paneeceM
=
VHF: E2-E12, $1-S20
AEP B/G/H WHE ESE cose PAL, SECAM
VHF: E2-E12, $1-S20
Spanish ae UHF: E21-E69, $21-S41 BAL
—+ =
BG Wel UHF: E21-E69 Bakcecean
OIRT
B/G,
D/K
PSE
NTSC
3.58/4.43
D/K VHF: RO1-R12 UHF: R21-R6e9 (video input onty)
1
UK UHF: 21-69 PAL
SPECIFICATIONS
Picture Tube Black Trinitron
Approx. 36.8 cm (14 inches)
(Approx. 33.7 cm picture measured diagonally)
90° -deflection
Input/Output Terminals
[INPUTS]
(1 21-pin connector (CENELEC standard)
- audio / video input
- RGB input
[OUTPUTS]
Q Headphone jack : minijack
Sound output 2W (RMS)
3W (music power)
Dimensions 367x369x410 mm approx.
Weight Approx. 10.0kg
Supplied accessories RM-836 Remote Commander (1)
IEC designated batteries (2)
Aerial (1)
Other
features
TELETEXT
(for
KV-M1451A/M1451B/M1451D/M1451E/M1451K/M1451U
only)

[RM-836]
Remote control system
Power requirements
Dimensions
Weight
infrared control
3V dc (2 batteries) R6 (size AA)
Approx. 210x45x24 mm (w/h/d)
Approx. 90g (Not including batteries)
Design and specifications are subject to change without notice.
Model camel KV-M1450A | KV-M1450B | KV-M1450D | KV-M1450E | KV-M1450K | KV-M1450U
KV-M1451A | KV-M1451B | KV-M1451D | KV-M1451E | KV-M1451K | KV-M1451U
Item
Pal Comb OFF OFF OFF OFF OFF OFF
PIP OFF OFF OFF OFF OFF OFF
RGB Priority ON ON ON ON ON
Scart 1 ON ON 5 ON ON ON
Scart 2 OFF OFF OFF OFF OFF OFF
Front in (3) OFF OFF OFF OFF OFF OFF
Scart 4 OFF OFF OFF OFF OFF OFF |
Projector OFF OFF OFF OFF OFF OFF
AKB in 16:9 mode OFF OFF OFF OFF OFF OFF
Norm B/G/H ON | ON | ON ON ON OFF
Norm | OFF OFF OFF OFF OFF ON
Norm D/K OFF OFF OFF OFF ON OFF
Norm AUS OFF OFF OFF OFF OFF OFF
Norm L OFF ON OFF OFF OFF OFF
Norm SAT OFF OFF OFF OFF OFF OFF
Norm M OFF OFF OFF OFF OFF OFF
Language Preset Italian French Spanish OIRT English
WARNING ( KV-M1450U/M1451U 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 a5 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 55 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-M145

KV-M145
21 pin connector ( 4-1 )
Signal Signal ievel
Audio output B (right) Standard level: 0.5Vrms
Output impedance:less than 1kohm*
Audio input B (right) Standard level:0.5Vrms
input impedance:More than 10kohms*
Audio output A (left) Standard level:0.5Vrms
Output impedance:less than 1kohm*
Ground (audio)
21 Ground (blue)
20 a
/ Audio input A (left) Standard level:0.5Vrms
1
9
Input
impedance:More
than
10kohms*
ae
18
:
7m
{
7
4
Blue
input
0.7V43dB,
75ohms,
positive
|
Sa
1
6
Function
select
(AV
control)
High
state
(9.5—12V):Part
mode
Low state (0—2V):TV mode
1
5
——_l
Input
impedance:More
than
10kohms
14 Input capacitance:Less than 2nF
ors Peo | esnaioen
||
RRS
A
Eee,
11 —
— 1 Green Green signal:0.7V+30B.
9 fe oe ca fSohmis);posive
—
8
a
a
a
ce
= Ge Pe [0 | emnites
5 a
4 15 oy Red input 0.7V23dB, 75ohms, positive
3
|
==
(S
signal)
croma
input
0.3V+3dB,
75ohms,
positive
2 16 Blanking input (Ys signal) High state (1—3V)
1
|
Low
state
(0O—0.4V)
Input impedance:750hms
Ss z
Ground (video output)
Ground (video input)
Video output 1V+3dB, 750hms, positive
Sync:0.3V(-3, +10dB)
Video input 1V+3dB, 7Sohms, positive
Sync:0.3V(—3, +10dB)
Video 1V+3dB, 75ohms, positive
Input/Y (S signal) Sync:0.3V(-3, +10dB)
Common ground (plug, shield)
© Connected @ Not Connected (open) * at 20Hz - 20kHz
=
= ©
nN
nN
= 3 N

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
REMOVAL OF THE ANODE CAP.
WARNING !!
AN ISOLATING TRANSFORMER SHOULD BE USED DURING
ANY SERVICE WORK TO AVOID POSSIBLE SHOCK HAZARD,
DUE TO A LIVE CHASSIS. THE CHASSIS OF THIS RECEIVER IS
DIRECTLY CONNECTED TO THE AC POWER LINE.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY SHADING AND MARKED ! 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
SUPPLEMENTS PUBLISHED BY SONY.
KV-M145
TABLE OF CONTENTS
Section Title Page Section Title Page
1. GENERAL 5. DIAGRAMS
Getting Started: cctesc cbc eked chet cs 7 Se. BlOck Dia sramis.ssisciscisiesedesbsssseusada rivals 035 estes eaaaniaayies 25
TV. Operations s.c:.Aciesssscaslidisset ceetssacseostesheresterdberanctees 8 5-2. Circuit Boards Location .........ccccsceeeseeeteeeeeteeeeenees 29
Teletext Operation... eee eee eeeeeesereeeeteeeeeeenaees 9 5-3. Schematic Diagrams and Printed Wiring Boards ....... 29
MENU Operation fe 9 PA BOA ences ccosveicssuaselvvsastvicdiangisusvencietiseareatoensienescetes 33
Optional Connections ..........ccceceeeesceceeceeeeeeeeeseeeeeeees 12 CBO and tvs. ice citisalen ati tascie tats eae 39
Additional Information... cceesesesceeeseseeseteeseneeee 13 5-4. SeMICONGUCLOTS 2.0... eee eeeeessenensensecencncencesneseseassers 41
2. DISASSEMBLY 6. EXPLODED VIEWS
2-1. Rear Cover Removal .0.......ccescceseseeeeeeseereseeneereeeeneeene 6-1. Chassis and Picture Tube ..........c.cecseesseeseeteeeeetenee 42
2-2. Service Position .............
2-3. Picture Tube Removal 7. ELECTRICAL PARTS LIST.....00.000.0 44
3. SET-UP ADJUSTMENTS
S-l;, -Béam: Landing .3.:..0ict iia iagd cused 16
3=2;., “COMVETSENCE ii: cctiesschdcsicescsJostea A bseseactsecessestasdeedentesess 17
3-3. Screen (G2), Drive, White Balance,
Sub Color and Sub Brightness «00.0... ceeeesseeeeeeeeees 19
BA, -) FOCUS ssccetelennctessestds Suds fearcntiaentes eeastitesuabhbbe spect’ vetenabss 19
4. CIRCUIT ADJUSTMENTS
4-1. Electrical Adjustment 20.00... cccccscescerceseetecreeteceens 20
4-2. Test Mode 2: ...ececeeeeseeeeeeees vw 2)
4-3. BE-4 Self Diagnostic Software 0... eee eeeeeeeeeee 23
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 AU COUCHE DE
CARBONE PEINTE SUR LE TUBE CATHODIQUE OU AU
BLINDAGE DU TUBE CATHODIQUE.
ATTENTION !!
AFIN D'EVITER TOUT RISQUE D'ELECTROCUTION
PROVENANT D'UN CHASSIS SOUS TENSION, UN
TRANSFORMATEUR D'ISOLEMENT DOIT ETRE UTILISE LORS
DE TOUT DEPANNAGE. LE CHASSIS DE CE RECEPTEUR EST
DIRECTEMENT RACCORDE A L'ALIMENTATION SECTEUR.
ATTENTION AUX COMPOSANTS RELATIFS A LA
SECURITE !!
LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET PAR
UNE MARQUE ! SURLES SCHEMAS DE PRINCIPE, LES
VUES EXPLOSEES ET LES LISTES DE PIECES SONT
D'UNE IMPORTANCE CRITIQUE POUR LA SECURITE DU
FONCTIONNEMENT, NE LES REMPLACER QUE PAR DES
COMPOSANTS SONY DONT LE NUMERO DE PIECE EST
INDIQUE DANS LE PRESENT MANUEL OU DANS DES
SUPPLEMENTS PUBLIES PAR SONY.

The operating instructions mentioned here are partial abstracts from
SECTION 1 GENERAL the Operating Instruction Manual. The page numbers of the
Operating Instruction Manual remain as in the manual.
Ge;
o oo

24
Getting Started
Please open the flap at the front and at the back of the
Instruction Manual for illustrations of the TV set and
the Remote Commander. Letters in boxes refer to the
buttons on the TV set, numbers in circles to the buttons
on the Remote Commander.
LL
Inserting the Batteries into the
Remote Commander
Always remember to dispose of
used batteries in an environmental
friendly way.
Connecting the Aerial
(If you are connecting a VCR, skip to step 3).
Connect an external aerial to the socket 17 J.
Where an external aerial is not available
connect the indoor aerial supplied:
1 Insert the supplied aerial into the opening on top of
the set.
2 Connect the aerial to the socket 1F [J on the rear of
the set.
3 Adjust the aerial for optimum reception.
25

26
Connecting a VCR
We recommend that you tune
in the signal to programme
number “0”.
For details see “Presetting
Channels Manually” on
page 31.
Presetting Channels
Automatically
TV searches for all available channels. PROGR 01
If manual tuning is preferred see Menu Uniti. - -
option - Presetting Channels Manually.
1 Plug into mains.
Depress power switch © [@ on TV set.
2 Press and hold BY] f@ on TV set for 2 seconds.
Auto tuning starts and screen shows.
When Auto tuning stops, the programme position 1 is displayed.
TV Operation
TV Operation
This section explains functions used whilst watching TV. Most operations are carried
out using the Remote Commander (numbers in circles). All basic functions are also
available on the TV set (letters in boxes).
To Press
Switch on ©fMonTv
Switch off temporarily o®
TV is now in standby mode, © indicator [J on
TV lights.
Switch on again © ®, PROGR +/-@ or any number
button@
Switch off completely © WonTv
To save energy we recommend switching off
completely when TV is not in use.
PROGR +/- ® Ef or number buttons @
For double digit numbers press -/-- @ then the
number e.g. For 23, press -/-- @ then 2 and 3.
Select programmes
Display the programme number ® ®
Press again to make programme number
disappear.
Adjust the volume —1+/-OB
Mute the sound «x@®
Press again to restore sound.
View
video
input
208
Press again to return to TV programme.
View programmes in 16:9 mode 2? @
Press again to return to 4:3 mode.
Note: 4 @ is to be used to optimise the viewing of 16:9 signals which will be
available in the future.
27

28
Teletext Operation (only for KV-M1451D)
Viewing Teletext
Teletext is an information service broadcast by TV stations.
1 Select the channel which carries the teletext service you
wish to receive.
2 Press © @ to switch on teletext.
3 Input three digits for the page number using the
programme number buttons @ or PROGR +/- ® &.
4 Press 2 © to switch off teletext.
Teletext errors may occur if the broadcasting signals
are weak
Functions ‘a 9) =:
Superimposing teletext on the TV ee
Press © @ once in teletext mode or twice in TV mode to
superimpose teletext on the TV screen.
Press © @ again to cancel superimposing.
Freezing a teletext subpage
Press © @ (HOLD) to freeze the subpage. Freezing the page prevents the
information that is displayed from being updated.
Press ©) @ to cancel HOLD and allow update to continue.
Revealing concealed information (eg: answers to a quiz).
Press (.) ® to reveal information.
Press again to conceal the information.
Using colour buttons to access pages
When the colour coded menu appears at the bottom of a page,
press the colour button (red, green, blue or yellow) eed
to access the corresponding page.
MENU Operation
Use buttons on Remote Commander to control Menu screen.
Green
Scroll up
MENU Red - NE Yellow
Menu Screen decrease / select VEN increase / confirm(OK)
on/ off
Blue
Scroll down
Adjusting the Picture
1° Press MENU ®.
2 Press green @ or blue ® button to select the item you wish to change.
Symbol Item - Effect +
ic) Picture Less More
® Colour Less More
9 Brightness — Darker Brighter
3 Press red © or yellow® button to change levels.
4 Press MENU ® to return to normal TV screen.
To reset to factory preset picture levels, press green @ or
blue ® button to select >*<« and press yellow (OK) @
button.
29

30
——— a aS 9 ET
Using the Sleep Timer
The TV may be set to switch to the standby
mode automatically after a length of time
chosen by you. You may set the time
in 30 minutes steps up to 4 hours.
1 Press MENU ®.
2 Press green @ or blue ® button to select ¢)
3 press red © or yellow ® button to set time delay.
0.00 (OFF) 0.30 1.00 1.30.... 4.00
4 Press MENU @ to return to normal TV screen.
When watching TV, press @ @ to display time remaining.
Presetting
Channels
ane
Manua
]
ly
UT.
-
-
Coo
Up to 60 programme positions are
available for presetting channels.
1 Press MENU ®.
2 Press green @ or blue ® button to select D> and
press yellow (OK) ® button.
Ww
Select programme number using PROGR +/- ® or
the number buttons @.
4 Press green @ or blue ® button to select TV system
if necessary and press red © or yellow® button to
change TV system.
vi
Press green @ or blue ® button to select tuning bar
and press red © or yellow® button to start channel search.
When a channel is found the tuning bar stops moving and
you see the picture.
io)
If you want to store, press green @ or blue ® button to
select © and press yellow (OK) ® button. If you don’t want,
press red Oor yellow @® button to continue search.
~
Repeat steps 3 to 6 for all other channels.
[oe]
Press MENU @ to return to normal TV screen.
31

32
Skipping
Programme Positions
You can skip unused programme positions when
selecting channels with the PROGR +/- @[E buttons.
You can still select them, however, using the number
buttons @.
1 Press MENU ®.
2 Press green @ or blue ® button to select >and
press yellow ® button.
3 Select programme number you want to skip
using PROGR +/- ® button or number
buttons @.
4 Press green @ or blue ® button to select Coo and
press yellow (OK) ® button.
5 Press green @ or blue ® button to select © and
press yellow (OK) ® button to store.
6 Repeat steps 3 to 5 for other unused programme
positions.
7 Press MENU @® to return to normal TV screen.
Fine-Tuning Channels
You can fine tune a stored channel.
1. Select the channel you wish to fine tune.
2 Press MENU ®.
3 Press green @ or blue ® button to select > and
press yellow (OK) ® button.
4 Press green @ or blue ® button to select =F + and
use red @ or yellow ® button to adjust tuning.
5 Press green @ or blue ® button to select © and
press yellow (OK) @ button to store.
6 Press MENU @ to return to normal TV screen.
33

34
——EE——————S—E—E————————_ a ee eer
Exchanging th
Programme Positions oo
After tuning you may wish to rearrange the
programme positions.
1 Press MENU @.
2 Press green @ or blue ® button to select > and
8
press yellow (OK) ® button.
3 Press green @ or blue ® button to select
PROGR 4h and press yellow (OK) ® button.
4 press red © or yellow ® button to select
the first programme position.
5 press the blue ® button.
6 Press the red © or yellow ® button to select
the second programme position.
7 Press blue ® button to select % and press
yellow (OK) ® button to exchange.
8 Repeat steps 4 to 7 for other programme
positions.
9 Press MENU @ to return to normal TV screen.
Optional Connections
Using
21-pin Connector
Your TV has one 21-pin connector [ff on the rear of the set.
You can connect optional audio or video equipment to this
connector, such as a VCR, video games or a video disc player.
1 Press 2) @ Ei to view the video input signal.
2 Press S) ® & or © Oto return to normal
TV operation.
Connecting
Headphones
Plug in the headphones to the 0 EY socket on the front of the TV set.
The sound from the speaker is now muted.
35

36
Additional Information
Troubleshooting
Here are some simple solutions to the problems which affect the picture and sound.
Problem Solution
No picture, screen is dark, no sound °
e
Plug the TV in.
Press © on the TV.
If © indicator [iJ is on press C) @ or the
programme number @ on the remote
commander.
Check the aerial connection.
Check that the video source is on.
Turn the TV off for 3 or 4 seconds and
then turn it on again using OG.
Poor or no picture (screen is dark, sound is good)
Press MENU ® and adjust brightness
picture and colour balance level.
Good picture, no sound .
e
Adjust the volume J +/-@BJ.
Disconnect any headphones.
If 8X is displayed on the screen, press 5K
o.
No colour on colour programmes e
Press MENU @® and adjust colour
balance.
Press MENU ® and reset to factory
settings.
Distorted picture when changing °
programmes or selecting teletext
Turn off the equipment connected to the
21-pin connector i.
Remote commander does not function °
Replace the batteries.
¢ If you continue to have these problems, have your TV serviced by qualified
personnel.
¢ NEVER open the casing yourself.

KV-M145
SECTION 2
DISASSEMBLY
2-1. REAR COVER REMOVAL
3) Rear cover
@ Two screws
(BVTP4x16)
Ore
Pe!
-
(2
Remove
the
two
claws
dd
2-2. SERVICE POSITION
—14—

KV-M145
2-3. PICTURE TUBE REMOVAL
© Degaussing coil
©) C board
@ Holder
© Deflection “x
® Two tapping
screws (5)
@) Anode cap
@) A board
Cushion
e REMOVAL OF 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.
@ Turn up one side of the rubber cap in Q) Using a thumb pull up the rubber cap GB) When one side of the rubber cap is
the direction indicated by the arrow (a) firmly in the direction indicated by the separated from the anode button, the
arrow @) anode-cap can be removed by turning
up the rubber cap and pulling it up in
HOW TO HANDLE AN ANODE-CAP 2 the direction of the arrow ©
Qe
Don't damage the surface of anode-cap with sharp
shaped material !
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.
@) Don’t turn the foot of rubber over hardly !
The shatter-hook terminal will stick out or damage the rubber.
©
ee

KV-M145
SECTION 3
SET-UP ADJUSTMENTS
The following adjustments should be made whena complete
realignment is required or a new picture tube is installed.
These adjustments should be performed with the rated
power supply voltage, unless otherwise noted.
The Contrast and Brightness controls should be set as follows
unless otherwise noted:
@ CONTRAST control.......... 80%
(or Normal by commander)
x BRIGHTNESS control....... 50%
Perform the adjustments in the following order:
1. Beam Landing
2. Convergence
3. Screen (G2), Drive, White Balance, Sub Color and
Sub Brightness.
4. Focus
Note: Test Equipment Required.
1. Color bar/Pattern Generator
2. Degausser
3. DC Power Supply
4. Digital multimeter
5. Oscilloscope
Preparation:
In order to reduce the influence of external magnetic
forces on the picture tube, face the TV set in an easterly
or westerly direction.
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.
Input an all white raster signal from the pattern generator.
CONTRAST \ anil
BRIGHTNESS
Switch the raster signal of the pattern generator to Red.
Move the deflection yoke backward, and adjust with the
purity control so that Red is at the center and the Blue and
Green are evenly spaced at the sides. see (Fig. 3-1 - 3-3)
Move the deflection yoke forward, and adjust so that the
entire screen becomes Red. (Fig. 3-1)
Switch the raster signal to Blue and then Green to confirm
the condition.
When the position of the deflection yoke has been
determined, tighten it with the deflection yoke mounting
screw.
When the landing at the corners is not correct, adjust by
using disk magnets. (Fig. 3-4)
Fig. 3-1
Fig. 3-2
9 Purity control
Fig. 3-3
Fig. 3-4
Disk magnets or
rotatable disk
magnets correct
these areas (a-d).
Deflection yoke
positioning corrects
these areas.
—16—

3-2. CONVERGENCE
Preparation:
Before starting, perform FOCUS, H.SIZE, and V.SIZE
adjustments.
Set the BRIGHTNESS control to minimum.
Input a dot pattern from the pattern generator.
(1) Horizontal and Vertical Static Convergence
Center dot
RV703 SCREEN
Adjust the V.STAT magnet to converge the Red, Green and
Blue dots at the center of the screen. (Vertical and Horizontal
movement)
Tilt the V.STAT magnet and adjust the static convergence
by opening or closing the V.STAT magnet.
x2
ve 4
ORD \ SY
KV-M145
2. When the V.STAT magnet is moved in the direction of
the (a) and (b) arrows, the Red, Green and Blue
dots move as shown below.
(1)
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.
2. Rotate the BMC magnet (b) to correct for insufficient
V.static convergence.
In either case, repeat the Beam Landing Adjustment.
:
BMC magnet
47

KV-M145
(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.
Move the deflection yoke for best convergence as shown
below.
Tighten the deflection yoke screw.
Install the deflection yoke spacers.
-_
L
RV704 FOCUS
(3) Screen-corner Convergence.
a-d: screen-corner
misconvergence
Affix a Permalloy ass’y
corresponding to the
misconverged areas
Permalloy assembly
Lae

3-3. SCREEN (G2), DRIVE, WHITE BALANCE,
SUB COLOR and SUB BRIGHTNESS.
RV703
SCREEN
Screen (G2) setting
1. Input a 0 IRE (Black Level) signal from the pattern
generator.
Enter into the Service Mode "Test""Test" and 38.
Adjust RV703 until the Down arrow is displayed.
Adjust RV703 until the Down arrow just disappears.
Press the TV Button on the Remote Commander to store
the data.
1. Input a Video signal containing a small area of 100%
white on a black background.
Ot a
2. Connect an oscilloscope to Pin Ge of J701 (R OUT)
on the C Board.
3. Set the Picture to maximum using "Test""Test" and 01.
4. Enter into the Service mode (Adjust Menu).
5. Using the Blue and Green buttons select "RED HWB".
6. 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. Input an all white pattern from the pattern generator.
2. Adjust the Color and Brightness controls to the standard
level.
Enter into the Service Mode.
4. Adjust the Green HWB and Blue HWB so that the
White Balance becomes optimum.
vs
KV-M145
Sub Color Adjustment
Input a PAL color bar pattern from the pattern generator.
2. Connect an oscilloscope to Pin S) of J701 (B OUT)
on the C Board.
3. Enter into the Service Mode "Test""Test" and 22.
4. Using the Red and Yellow buttons on the Remote
Commander adjust until the oscilloscope waveform
becomes as follows :
_—
praees SAME LEVEL
B. OUT
Note : If the TV is able to receive PAL and SECAM
transmissions, repeat the above procedure using a Secam
color 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 until the 0 IRE of the grey scale and the
cut off are only slightly visible on the screen.
3-4. FOCUS
Adjust the FOCUS control RV704 so that the whole screen is in
best focus.
C board
RV704
FOCUS
—19—

KV-M145
4-1. ELECTRICAL ADJUSTMENTS
Service adjustment to this model can be performed
with the supplied Remote Control Commander RM-836.
SECTION 4
CIRCUIT ADJUSTMENTS
Range of adjustments available from the on screen menu
HOW TO ENTER INTO SERVICE MODE
1. Turn on the main power of the set and enter into
stand-by mode.
2. Press the following sequence of buttons on the Remote
Control Commander.
vA
=O
(ON SCREEN (DIGIT 5)
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.
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.
90
system.
[ Adjustment Set Range
16:9 Off Select ON/OFF
BG-L, BG-DK
System Select UK, Eire, BG
Text Select EAST/WEST
AGC Adj. 00 - 63
PLL Adj. 00 - 63
B&W Delay Adj. 00 - 63
Ver Size Adj. 00 - 63
Ver, Breath 00 00 - 63
Par, Amp! 00 00 - 63
Par, Tilt 32 00 - 63
V, Linear Adj. 00 - 63
V, Cen or EW Adj. 00 - 63
V, Position 42 00 - 63
H, Centre Adj. 00 - 63
Blue HWB Adj. 00 - 63
Green HWB Adj. 00 - 63
Red HWB Adj