Sony KV43TR27 User manual

KV43TR27
RM-781
SERVICE MANUAL
US Model
Chassis No. SCC-D37L-A
Canadian Model
Chassis No. SCC-D36H-A
P-3B CHASSIS
Television system
Channel coverage
Picture tube
Power requirements
Power consumption
Accessories supplied
Optional accessories
Speaker size :
American TV standards
VHF : 2-13
UHF : 14-69
MODELS OF THE SAME SERIES
1KV-13TR24X
I I
KV-13TR14,‘13TR24
SPECIFICATIONS
Speaker Impedance
Speaker Wattage
Dimensions
Weight
812
Approx. 2W
Approx. 356X 331 X 407 mm (w/h/d)
Approx. 10.5kg
Cable TV : 1-125
Mirror black Trinitron tube
13-inch picture measured diagonally
14-inch picture tube measured diagonally
VIDEO IN (phono jack) : lVp-p,
75ohms unbalanced, sync negative
AUDIO IN(phono jack) : 408mVrms
(100% modulation)
impedance : 47k ohms
120V AC, 60Hz
97W (Max.) 3W (STAND BY)
Remote Commander RM-781 .
with 2 size AA (R6) batteries
VHF/UHF telescopic dipole antenna (1)
Antenna connector (1)
U/V mixer EAC-66
Connecting cord VMG606M/607M,
etc.
77mm X 1
Designs and specifications are subject to change without
notice.
TRINITRONB COLORTV
SONY@

TABLE OF CONTENTS
Section Title m
1. GENERAL
1-1.
Location
of Controls.. ....................................... .
l-2.
Presetting TTJ Channels.. .................... Z.. ........... 5
1-3.
Watching TT,~ Programs.. ..................................
.
l-4.
Adjusting
the Picture ....................................... 6
1-5.
Enjoying the Convenient Features ....................7
l-6.
Timer/Block.. ................................................... .
2. DISASSEMBLY
2-l. Service Position ..............................................
10
2-2.
Picture Tube Removal ....................................
11
3. SET-UP ADJUSTMENTS
3-l. Beam Landing.................................................
12
3-2.
Convergence.. .................................................. 13
3-3.
Focus ..............................................................
14
3-4.
Sub BRT
......................................................... 14
3-5.
White Balance .................................................
14
WARNING !! ATTENTION!!
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 CON-
NECTED TO THE AC POWER LINE.
AFIN D’EVITER TOUT RISQUE D’ELECTROCUTION
PROVENANT D’UN CHkBIS SOUS TENSION, UN
TRANSFORMATEUR D’ISOLEMENT DOIT ETRE
UTILISC LORS DE TOUT DiPANNAGE.
LE CHk!SlS DE CE RiCEPtEUR EST DIRECTEMENT
RACCORO~ i& L’ALIMENTATION SECTEUR.
SAFETY-RELATED COMPONENT WARNING !!
COMPONENTS IDENTIFIED BY SHADING AND MARK
A ON THE SCHEMATIC DIAGRAMS, EXPLODED
VIEWS AND IN THE PARTS LIST ARE CRITICAL TO
SAFE OPERATION. REPLACE THESE COMPONENTS
WITH SONY PARTS WHOSE PART NUMBERS APPEAR
AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS
THAT ARE CRITICAL TO SAFE OPERATION AkE
IDENTIFIED IN THIS MANUAL. FOLLOW THESE PRO-
CEDURES WHENEVER CRITICAL COMPONENTS ARE
REPLACED OR IMPROPER OPERATION IS SUSPECTED.
Section
4. SAFETY RELATED ADJUSTMENT....................... 15
5. ELECTRICAL ADJUSTMENTS
5-1. ABoard
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17
6. DIAGRAMS
6-1.
Circuit Board Location.. .................................
19
6-2. Printed Wiring Board .....................................
20
6-3.
Schematic Diagram ..........................................
23
6-4.
Semiconductors.. ..............................................
27
7. EXPLODED VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8. ELECTRICAL PARTS LIST . . . . . ..a............................ 29
ATTENTION AUX COMPOSANTS RELATIFS ALA
ShURITi!!
LES COMPOSANTS IDENTIFIiS PAR UNE TRAME ET
PAR UNE MARQUE ASUR LES SCHiMAS DE PRiNCIPE,
LES VUES EXPLOSiES ET LES LISTES DE PIECES
SONT D*UirE IMPORTANCE CRITIQUE POUR LA
SiCURlTi DU FONCTIONNEMENT. NE LES REM-
PLACER QUE PAR DES COMPOSANTS SONY DONT LE
NUMiRO DE PIiCE EST INDlOUi DANS LE PRhENT
MANUEL OU DANS DES SUPPLiMENTB PUBLliS PAR
SONY. LES RiGLAGES DE ‘*CIRCUIT DONT L’IMPOR-
TANCE EST CRITIQUE POUR LA SkCURITi DU
FONCTIONNEMENT SONT IDENTIFIES DANS LE
PRiSENT MANUEL. SUIVRE CES PROCiDURES LORS
DE CHAOUE REMPLACEMENT DE COMPOSANTS
CRITIQUES. OU LORSQU’UN MAUVAIS FONCTIONNE-
MENT EST SUSPECTi.
-2-

SAFETY CHECK-OUT
( KV-13W871
(US Model only)
After correcting the original service problem,
perform the following safety checks before releasing
the set to the customer:
1.
Check the area of your repair for unsoldered or
poorly-soldered connections. Check the entire
board surface for solder splashes and bridges.
2.
Check the inierboard wiring to ensure that no
wires are “pinched” or contact high-wattage
resistors.
3. Check that all control knobs, shields, covers,
ground straps, and mounting hardware have
been replaced. Be absolutely certain that you
have replaced all the insulators.
4. Look for unauthorized replacement parts, par-
ticularly transistors, that were installed during a
previous repair. Point them out to the customer
and recommend their replacement.
5. Look for parts which, though functioning, show
obvious signs of deterioration. Point them out
to the customer and recommend their replace-
ment ,
6. Check the line cord for cracks and abrasion.
Recommend the replacement of any such line
cord to the customer.
7. Check the condition of the monopole antenna
(if any).
Make sure the end is not broken off, and has
the plastic cap on it. Point out the danger of
impalement on a broken antenna to the
customer, and’ recommend the antenna’s
replacement.
8. Check the B+ and HV to see they are at the
values specified. Make sure your instruments
are accurate; be suspicious of your HV meter
if sets always have low HV.
9. Check the antenna terminals, meta! trim,
“metallized” knobs, screws, and all other
exposed metal parts for AC leakage. Check
leakage as described below.
LEAKAGE TEST
The AC leakage from any exposed metal part to
earth ground and from all exposed metal parts to any
exposed metal part having a return to chassis, must
not exceed 0.5 mA (500 microampers). Leakage
current can be measured by any one of three
methods.
1. A commercial leakage tester, such as the
Simpson 229 or RCA WT-540A. Follow the
manufacturers’ instructions to use these instru-
ments.
2. A battery-operated AC milliammeter. The Data
Precision 245 digital multimeter is suitable for
this job.
3. Measuring the voltage drop across a resistor by
means of a VOM or battery-operated AC volt-
meter.
The “limit” indication is 0.75V, so
analog meters must have an accurate low-
voltage scale. The Simpson 250 and Sanwa
SH-63Trd are examples of a passive VOM that
is suitable. Nearly all battery operated digital
multimeters that have a 2V AC range are
suitable. (See Fig. A)
HOW TO FIND A GOOD EARTH GROUND
A cold-water pipe is guaranteed earth ground; the
cover-plate retaining screw on most AC outlet boxes is
also at earth ground. If the retaining screw is to be
used as your earth-ground, verify that it is at ground
by measuring the resistance between it and a cold-
water pipe with an ohmmeter. The reading should be
zero ohms. If a cold-water pipe is not accessible,
connect a 60-100 .watts trouble light (not a neon
lamp) between the hot side of the receptacle and the
retaining screw. Try both slots, if necessary, to locate
the hot side of the line, the lamp should light at
normal brilliance if the screw is at ground potential.
(See Fig. B)
To Exposed Me tat
Parts on Set
I
0.15pF AC voltmeter
10.75 VI
I
- Earth Ground
liig. A. Using an AC voltmeter to check AC leakage.
Fig. 6. Checking for earth ground.
Trouble Light
Cold-water Pipe
-3

SECTION I
GENERAL
l-l. LOCATION OF CONTROLS
Ffefer to the pai mdlcated I” 0for detals
Monitor-
I
P
r----------u
I
II
I
b
I
I
1---------I
TV,VIDEO button ’ me.... control detector
VOLUME +/- buttons TfMER
lamp
CHANNEL +/- buttons bOWER
switch
On-screen displays
a *
Channel numbers
. “MUTfNG”or “SLEEP” mdlcatlon
. ‘VIDEO lndlcatu3n
b) -
‘AUTO PROGRAM’, ‘TIMER or TIMER
BLOCK mdlcaton
c) *
Bar dwplay for volume OP picture adJustmeN
. Currpnt +,me for Twner/Block
AUDIO IN jack
VIDEO IN jack
VHF/UHF antenna terminal
RemotecornmandsrRY-781
MUTING button
TIMER/BLOCK setting buttons -
(TIMER/BLOCK, CLEAR, AM/PM,
OFF/REPEAT)
Channel presetting buttons -
(AUTO PGM, ADD, ERASE)
Channel number buttons -
DISPLAY button
PICTURE +I- buttons
* VOL (volume) +I- buttons -
-SLEEP button
-* POWER switch
Picture adjusting buttons
(SELECT, RESET, LEVEL 1
CABLE button
* TV/VIDEO button
6)
ENTER button
JUMP button
* CH (channel) +/-buttons
-The functions of these buttons
are also available on ihe TV.
. In normal operaton. batteries will last up to half a year.lf
the Commander does not operate properly, the batteries
might be exhausted Replace them wth new ones.
l To avoid damage from posstble battery leakage, remove
the battenes when the Commander wll not be used for a
long me.
l If a Remote Commander that IS not recommended IS used
to operate this N. or of the suppked Remote Commander 1s
used to operate another N. the TV may not operate
properly

l-2. PRESETTING TV CHANNELS
RM-781
1
Press POWER on the TV or the Remote
Commander to turn the N on.
To preset VHF or UHF To preset cable TV
channels channels
3
Press AUTO PGM.
“AUTO PROGRAM IS dlsplayed on the screen and recavable
channels (other than the channels already preset)wll be preset I”
numerical sequence The channels prewously preset reman I” the
umt’s memory
When no more channels can be found the programrmng stops ant
the lowest numbered channel IS dIsplayed
Recewable channels of thls TV are:
I VHF 2.13
T O check Preset channels
PESS CH +,-
1UHF ,469 I
Cable 1 125 I,
the “VIDEO” md,catlon IS dasplayed on the screen
To add the channels that could not be preset wth automatic
p,og,amm,ng because the,, s,gna, strength was loo weak or lo
erase unnecessary channels, follow the steps I” To preset only
Press the TVNIDEO bunon on the TV or the Remote
Commander so that a channel “umber appears
the dewed channeis on the next Page
-ENTER
1
Press the channel number button(s) and then ENTER to select
the channel to be added or erased.
2
To add channels - Press A
ADD
a
A ‘+ appears ior a moment
This channel has now bee” added to the channel scan memory
To erase channels -Press ERASE.
ERASE
T3
A -appears for a moment
Thus channel has now bee” erased from the channel scan memory
The next t,me the CH +/- button IS pressed this channel will be
skipped
Repeat steps 1 and 2 for other channels to be added or erased
CableT” channel chart’
Cable TVsystems use letters or numbers 10 designate channels
To tune I” a channel refer lo the cha” below
Number onthis TV
1 5 61415 15 17 18 19 20 21 22 23 24 25 26 27 28 29 30
Correspo”d!“g CAT” channel A 8 A-7 A-6 A
B c0 E
FGHIJK
LMNOPrI
39
................ $3 95 96 97 98 99 100 to, 102 ..__ 123 124 125
115 1\4 4\3 .a2 1\? w-59w.60~.6 W.82
W.83 wed
Check w,th your local cable TV company for more complete
. The des,g”at,on of the cable TVchannels conformS 10 the
,nformabon on the ava,,able channels EWNCTA
recommendat~o”

I
aa
I
l-3. WATCHING TV PROGRAMS
ENTER-
RM-781
1Press POWER on the N or the
Remote
Commander to turn the N on.
Press SELECT repeatedly unto1 the on-screen display of the Item lo be adjusted
appears. then press LEVEL +/-
Press CABLE so that the appropriate
RESET
SELECT
LEVEL+/-
purplish
To wew VHF or UHF To wew cabel TV
channels channels
3
Select a channel in one of the followmg two ways:
To scan the preset :To select a channel dwectly,
channels in numerICal : press the channel number
SeCf”e”Ce,
Ibutton(s) and then ENTER
press CH +I- IFor example, to select channel
1 10. press 1 0 and ENTER
f o
0
-PICTURE +/- -LEVEL +
no
r--I
RM-781
~~ decrease 1 =
1 k-* - 1 TO mcrease
color mterwty -
L color lntenslty
BRIGHT (brightness)
-LEVEL +
IO
1
’
Darker 1
- .y Srlghter
SHARP (sharpness)
-LEVEL +
4press VOL
+ or-to adlust the volume.
f
0
Note
To turn off the N
To adlust plCt”FZ COtItraSt
IZF-
press to InCreaSe pcture
cm,,ras, w,,h wwd color
Press POWER on the TV or the Remote Commander awn
PICTURE
14. ADJUSTING THE PICTURE
HUE
-LEVEL +
-\ Sharper

l-5. ENJOYING THE CONVENIENT FEATURES l-6. TIMER/BLOCK
MUTING-
DISPLAY-
RM-7t
-SLEEP
Muting the sound
Press MUTING.
The “MUTING” indication will appear on the screen.
To restore the sound. press MUTING agal” or VOL +
Keeping the channel displayed
Press DISPLAY.
To make the channel display disappear, press DISPLAY
agal”.
Using the SLEEP timer
-JUMP Press SLEEP
The TV will be turned off automatically after about one hour.
The green “SLEEP ON” indication will appear on the screen
for a few seconds when SLEEP 1s pressed and the red
“SLEEP” indication will appear one mmute before the TV is
turned off.
To cancel the SLEEP timer, press SLEEP agam. or turn off
the TV. The “SLEEP OFF” indication will appear when
SLEEP is pressed agam.
Switching quickly between two channels
Press JUMP
Each time JUMP IS pressed. the channel which appeared on
the screen directly before IS recalled. Thts button enables
you to keep track of two programs alternately.
Internal clock Once the Internalclock IS set. the current time will appear on the screen.
It IS necessary to set the clock correctly to activate the program stalt TIMER and channel
Program start TlMER Makes a program of your choice appear on the screen automatically at the dewed time.
Channel BLOCK
Blocks a channel from appearmg on the screen for 12 hours.
Use channel BLOCK to mevent children from watchma undesirable proarams.
The buttons used for the above functions
are located on the Remote Commander.
CLEAR
I
I
TIMER/BLOCKTIMER/BLOCK
AM/PM
OFF/REPEAT
Channel numberChannel number
buttons
I
ENTER
To set the mternal clock, program start TIMER and channel BLOCK, YOU
must summon the corresponding “pages”. “clock page.” “TIMER page”
and “BLOCK page.”
To change the “pages”. press TIMEWBLOCK.
IT/Bstands for the TIMEWBLOCK button.
k--l
“AM”/“PM” indication disappears
before “AM/PM”
T/B
a All settmgs will be erased from the unit3 memory it the umt 15 unplugged. or if a power
failure omws.
. The TIMER and BLOCK will overate ontv if :he clock is set correctI”.
. ,I the TIMER and BLOCK are ;et tar o”&pp,“g times .,nthe sam; channel. the
blocked channel wilt appear on the screen at the time set on the TIMER.

I
co
I
Example: To set the clock to 9:OS PM
1
Press TIMER/BLOCK once to change from “normal page”
to “clock page.-
TIMEWBLOCK
“clock page”
2
Press 0.9,O. 5 AM/PM (0 necessary).
I I 1
3
If you have performed the operation correctly, press
ENTER.
The numbers will “wmk” to Indicate that the clock has been
set. (The 0 m front will disappear.) ENTER
If you have made a mistake, press CLEAR and return to step 2.
The “AM/PM” indication will disappear after 2 seconds.
To summon “TIMER page,” press TIMER/BLOCK before
the “AM”/“PM” indication disappears.
To retwn to “normal page,” press TIMER/BLOCK after
the “AM”/“PM” indication has disappeared.
To reset the clock, s”mm~” “cloCk page” and Press CLEAR
before the “AMY’PM” indication disappears. Then follow the
Make sure that the clock has been set correctly before Setting the channel BLOCK.
Example: To set the BLOCK for a program which begins at 930 AM on channel 9
1
Press TIMER/BLOCK three times to change from “normal
page” to “BLOCK page.”
TIMEWBLOCK
“BLOCK page”
(indications m red)
2
Press 0.9.3.0. ENTER (0 necessary).
Numbers will “wmk” to Indicate that the time has been Set.
Press 8, ENTER (0 not necessary). Numbers will “wmk” to
Indicate that the channel has been Set.
The BLOCK has now been set.
If you have made a mstake, press CLEAR and return to
step 2.
At the preset time, the picture of the selected channel will
be blocked from wew and the sound will be muted.
A red “BLOCKED’ indication will appear on the screen while
the channel is blocked.
Normal reception will be resumed after 12 hours.
To return to normal reception white the channel is blocked,
recall “BLOCK page” and press CLEAR.
The BLOCK setting blocks a speafled channel for the same
12.how pewad everyday.
T O clear BLOCK setting. summon “BLOCK page” and Press
CLEAR.
To reset, clear the setting and follow fhe steps above from
steo 2.

I
W
Make sure that the clock has been set correctly before setting the program start TIMER.
Example: To set the TIMER for a program which begins at IO:30 PM on channel 12
1Press TIMERBLOCK once to change from
“normal page” to “clock page.”
TIMEWBLOCK
“clock page”
2Press TIMER/BLOCK before the “AWf’PM”
indlcabon disappears and summon “TIMER
page ,*
TIMER/BLOCK
“TIMER page”
3Press 1.0.3.0, AM/PM, ENTER
Numbers will “v,“W lo lndlcate that the bme has
been SB,
&I&;,
. I 6 AM/PM ENTER
4Press 1,2, ENTER (0 not necessary)
Numbers will “wmk” to mdlcate that the
channel has been set
The TIMER lamp wtll ltght up to lndlcate that the TIMER has
been set
If you have made a nIlstake, p’ess CLEAR and ref”m 10 step 3
me TIMER operates Only once. but the bme and the channel I”,,,
remam m fhe “W’s memory
A, the preset tme, the selected channel WI,, appear on the screen
and the TIMER lamp wtll go out The TIMER w,,, operate whether
you are wa,ch,ng a TV Program or a VCR playback. or eve” If you
have turned OR the TV
If you want to preset the same channel at the same time for a
MUE de, press OFF~EPEAT me TIMER lamp w,, ,lght “p
lo indwte ,hai the TIMER has been r.?acWa,ed
If no button is pressed within 2 hours after the preset time. an
‘OFF ,“d,ca,,on “,,I, appear on the screen for 1 m,n”,e If a bunon
1s sttll no, ,o”cCed during the 1 m,n”,e. the TV wl, turn o”
a”tOmatlCally a* a safely precautvx
If you want to deact,vate the TIMER, press OFF/REPEAT
agan so that ,he TIMER ‘amp goes out I, IS no, necessary to
summa” -TIMER page” to “se the OFF/REPEAT bun””
F”“hermore. ,h,s button 15 effective even 1, the TV has bee”
,“m?.d ofi
To clear the TlUER setting. summon “TIMER page” and press
CLEAR
To reset. clear the seblng and lollaw the s,ePs from step 3

SECTION 2
DISASSEMBLY
2-l. SERVICE POSITION
Pull out and turn up the A board
in the direction shown by the arrow.
- 10 -

2-2. PICTURE TUBE REMOVAL
Note : Follow the disassembly procedure in the
numerical order given.
@COIL DEMAGNETIZATION
@ C BOARD
@I DEFLECTION YOKE
@ SPEAKER -
@I TWO SCREWS
0 ANODE CAP -
l REMOVAL OF ANODE-CAP
* REMOVING PROCEDURES
\
@A BOARD
8 TWO SCREWS
@I PICTURE TUBE
CUSHION
\-
Anode button
@Turn up one side of the rubber cap in @Using a thumb pull up the rubber cap @When one side of the rubber cap is
the direction indicated by the arrow @. firmly in the direction indicated by the separated from the anode button, the
arrow @.
snode-cap can be removed by turning
up the rubber cap and pulling up it in
the direction of the arrow 6%
1 HOW TO HANDLE AN ANODE-CAP
0
Q
0
Don’t hurt the surface of anode-caps with
sharp shaped material!
Don’t press the rubber hardly not to hurt
inside of anode-caps!
A material fitting called as shatter-hook
terminal is built in the rubber.
Don’t turn the foot of rubber over hardly!
The shatter-hook terminal will stick out or
hurt the rubber.
- 11 -

SECTION 3
SET-UP ADJUSTMENTS
lThe following abjustments should be made when
a complete realignment is required or a new
picture tube is installed.
l These abjustments should be performed with rated
power supply voltage unless otherwise noted.
Controls and switch should be set as follows unless
otherwise noted :
PICTURE control
. . . . . . . . . . . . . . . . . . . . . . MAXIMUM
BRIGHTNESS control . . . . . . . . . . . . . . . . MAXIMUM
Perform the adjustments in order as follows :
1. Beam Landing
2. Convergence
3. Focus
4. Sub Brightness
5. White Balance
Note : Test Equipment Repuired.
1. Color-bar/Pattern Generator
2. Degausser
3-1. BEAM LANDING
Preparation.
0
0
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Feed in the white pattern.
Before starting, degauss the entire screen.
Loosen deflection yoke screw.
Adjust purity control as shown in Fig.3-1.
Slide deflection yoke as far forward as it will go.
Turn the raster signal of the pattern generator to
red.
Adjust purity control to center vertical red band
as shown in Fig.3-2.
Slide deflection yoke back for a uniform red screen.
Check green and blue rasters for uniformity by
performing the same way as steps 4, 5 and 6.
Tighten the deflection yoke screw.
Check if mislanding appears at corners a-d as
shown in Fig. 3-3. If mislandig is observed, correct
it as shown in Fig. 3-3.
Confirm that beam landing is correct when the
receiver is faced in all directions.
PURITY CONTROL
Fig. 3-l.
this bea. 1
I[
yaas la-d). ]
Fig. 3-3.
- 12 -

( KV-133;fW&‘, -
3-2. CONVERGENCE
Preparation :
l Before starting, perform FOCUS, H. SIZE and V.
SIZE adjustments.
lSet BRIGHTNESS control to fully counterclock -
wise.
l Feed in the dot pattern.
(1) Horizontal and Vertical Static Convergence
4.
Center dot
1.
2.
3.
0
El
G DRIVE
B BKG
G BKG
R BKG
SUB BRT
Adjust H. STAT VR to coincide red, green and
blue dots on the center of screen.
(Horizontal movement)
Adjust V. STAT magnet to coincide red, green
and blue dots on the center of screen.
(Vertical movement)
If the red, green and blue dots do not coincide on
the center of screen with H. STAT VR, perform
horizontal convergence adjustment using H.
STAT VR and V. STAT magnet as shown below.
(In this case, H. STAT VR and V. STAT magnet
effect each other.)
Tilt the V.STAT magnet and adjust static con-
vergence to open or close the V. STAT magnet.
When the V.STAT magnet is moved in the
direction of arrow @ and @ , Red, Green and
Blue dots move as shown below.
I
B G R
If blue dot dose not coincide with red and green
dots, perform following steps.
Move BMC magnet (a) to correct insufficient
H. static convergence.
Rotate BMC magnet (b) to correct insufficient
V. static convergence.
In either case, repeat Beam Landing Adjtstment.
MC Magnet
- 13 -

(2) Dynamic Convergence Adjustment
Preparation :
l Before starting, perform Horizontal and Vertical
Static Convergence Adjustment.
1. Loosen deflection yoke screw.
2. Remove deflection yoke spacers.
3. Move the deflection yoke for best convergence as
shown below.
4. Tighten the deflection yoke screw.
5.
Install the deflection yoke spacers.
3-3. FOCUS (G4)( RV707)
Adjust FOCUS control for a best picture.
3-4. SUB BRT (RV709)
1.
Feed in a cross-hatch pattern.
2.
Set PICTURE and BRIGHTNESS to minimum.
3.
Turn RV709 (SUB BRT) slowly to obtain a faintly
visible cross-hatch.
3-5. WHITE BALANCE
Feed in the cross-hatch pattern.
1.
2.
3.
Set BRIGHTNESS and PICTURE controls
to miniium.
Turn RV704 (B.DRIVE) and RV702 (G.
DRIVE) fully counterclockwise.
Set RV701 (R.BKG), RV703 (G.BKG), RV
705 (B.BKG) and RV709 (SUB BRT) to
mechanical center.
7.
(3) Screen-corner Convergence
Turn RV706(SCREEN) slowly to obtain a
faintly visible cross-hatch. Note the color
that frost becomes visible by turning RV708.
Do not turn a BKG control for this color.
Adjust the other two BKG controls for best
white balance (neutral gray) of the faint
cross-hatch.
Set BRIGHTNESS and PICTURE controls
to maximum. Observe the screen and adjust
the DRIVE controls for best white balance.
Repeat Steps 1 through 6 several times.
Permalloy
14 -

SECTION 4
SAFETY RELATED ADJUSTMENT
R R568 CONFIRMATION METHOD (HOLD-DOWN
CONFIRMATION) AND READJUSTMENTS
When replacing the following components (marked
with 0 on the schematic diagram) , always perform
the adjustment as follows :
IC301, D502, C514, C517, C518, C525, C530, C561,
R512, R521, R522, R555, R556, R567, R568, T503, DY
(1) Preparation before confirmation
1. Turn the POWER switch ON, and receive entire-
ly dot signals and set the PICTURE and BRIGBT-
NESS controls to minimum.
2. Confirm that voltage of T85 is more than 25.0f
2.5V DC when set is operating normally with 120
V AC supply.
(2) Hold-down operation confirmation
1. Turn the POWER switch ON, and receive entire-
ly dot signals and set the PICTURE and BRIGIIT-
NESS controls to minimum.
2. Apply DC voltage to the check terminal of TP85
via lT40 from the DC stabilized power source.
Confirm that the minimum voltage is less than
*30.7V whereby the raster disappears during of
hold-down circuit.
NOTE : when the hold-down circuit starts operating,
switch OFF the POWER of the set im-
mediately.
T503 ; -
FBT ;
I
TP85
(3) Hold-down readjustment
When step(2) is not satisfied, readjustment should
be performed by altering the resistance value of R
568 (a component marked with 6).
(4) Confirmation of hold-down errorneous operation
l.Turn the POWER switch ON, and receive dot
signals and set the PICTURE and BRIGBTNESS
controls to minimum.
2. Confirm that the hold-down circuit does not
operate by turning the POWER switch ON and
OFF repeatedly several times.
NOTE : If the hold-down circuit starts operating in
the above case, switch OFF the POWER of
the set immediately.
3. Turn the POWER switch ON, and receive dot
signals and entirely white signals, and set the
PICTURE and BRIGHTNESS controls to maxi-
mum.
- 15-

KV- 13TR27
RM-781 I
4. Confirm that the hold-down circuit does not
operate by performing switchover of the channels
of the dot signals and entirely white signals
several times.
NOTE : If the hold-down circuit starts operating in
the above case, switch OFF the POWER of
the set immediately.
5. If the above-mentioned steps 1 to 4 are not
satisfied reconfirm steps (2) to (4) by altering the
R568 smaller resistance value (a component
marked with a).
*Use a digital multimeter who& input impedance
is over 100MQ when confirming the voltage of
TP85.
B+ VOLTAGE CONFIRMATION
The following adjustments should always be perform-
ed w,hen replacing IC601.
1. Supply 130tgV AC to with variable auto-trans-
former.
2. Receive Monoscope signals.
3. Set the PICTURE and BRIGHTNESS controls
in to Initial Reset.
4. Confirm the voltage of pin @ of IC601 is less
than 137.2OV DC.
5. If step 4 is not satisfied, replace IC601 and repeat
above steps.
digital
multimeter
regulated-dc
power supply
digital
multimeter
- 16 -

SECTION 5
ELECTRICAL ADJUSTMENTS
5-l. A BOARD ASDJUSTMENT
-Component Side -
cl
RV401
@)IVlOEO LEVEI 1
cl
ma B RV402
IAUDIO I EVFl 1
A board
IBAR POSITION ADJUSTMENT (~vl0l)l
IH.FREQ ADJUSTMENT (Rv501)l
1. Receive a cblor-bar signal.
2. Set the PI&TURE button to maximum.
3. Adjust RVlOl to the point where the arrow indi-
cate.
IRF AGC ADJUSTMENT (w201)/
1.
Recive an off-air signal.
2. Adjust AGC VR (AGC VR of IF’201) so that
snow noise and cross-modulation just disappear
from the picture.
ISUB CONTRAST ADJUSTMENT (RV303)(
1. Receive a color-bar signal.
PICTURE . . . . . . . . . . MAX
BRT . . . . . . . . . . . . . . CENTER
COLOR . . . . . . . . . . . . MIN
2.
Connect circuit between Base of Q354 and 9.3V
line with a jumper wire.
3. Draw A-8 - C-3 connector (C Board).
4. Connect an oscilloscope to the pin @ of A-8
connector (blue out).
5. Adjust RV303 (SUB CONT) so that voltage is
2.1 rt o.o5vp-p.
whrte
1. Receive an off-air signal.
2. Connect circuit between pin @ of IC301 (H IN)
and pin @ of IC301 (VCCZ) with a jumper wire.
3. Connect the frequency counter across Base of Q
550 and ground.
4.
Adjust RV501 for 15,734kHz-t50Hz on the fre-
,
quency counter.
5.
Disconnect a jumper wire from IC301.
Iv.FREQ ADJUSTMENT (~v502)j
1. Receive an off-air signal.
2. Connect circuit between pin @ of IC301 (V IN)
and pin @ of IC301 (VCCZ) with a jumper wire.
3. Connect the fre uency counter across DY-1
connector (V.DY - )
6
and ground.
4. Adjust RV502 for 55.0+0.3Hz on the frequency
counter.
5. Disconnect a jumper wire from IC301.
D Y- 1 connector
CHECK
point
I-
l. Recive a cross-hatch signal.
2. Set PICTURE and BRT to normal.
3. Adjust H.CENT (H.CENT TAP=A-13) for best
picture.
I-
l.
Receive a cross-hatch signal.
2. Set PICTURE and BRT to normal.
3. Adjust V.CENT (S501) for best picture.
- 17 -

KV- 13TR27
RM-781
MEMO

SECTION 6
I
KV--13TR27
RM-781
DIAGRAMS
6-1. CIRCUIT BOARD LOCATION
Note :
* All capacitors are in r~ F unless otherwise noted. pF : Jo IJ F
50WV or less are not indicated except for electrolytics.
* All resistors are in ohms.
. internal component.
: -&- I nonflammable resistor.
* e : fusible resistor.
* 0 : panel designation, adjustment for repair.
* Indication of resistance, which dose not have one for
rating electrical power, is as follows.
-1
* All variable end adjustable resistors have characteristic
curve B, unless otherwise noted.
* The components identified by q in this basic schematic
diagram have been carefully factory-selected for each set
in order to satisfy regulations regarding X-ray radiation.
Should replacement be reauired, replace only with the
value originally used.
* When replacing components identified by q , make the
necessary adjustments indicated. If results do not meet
the specified value, change the component identified by
q and repeat the adjustment until the specified value is
achieved.(Refer to R381 adjustment on Page 15, 16.)
l When replacing the part in below table, be sure to per-
form the related adjustment.
. Voltages are dc with respect to ground unless otherwise
noted.
* All voltages are in V.
* Reading are taken with a color-bar signal input.
. Reading are taken with a NTSC 358 color-bar signal input
9 Voltage variations may be noted due to normal produc-
tion tolerances
.
: B+ bus.
. m8: B- bus
* ?%).> signal path.
* Voltage in audio circuit are measured receving the
FM broadcast.
Reference information
RESISTOR : RN METAL FILM
: RC SOLID
: FPRD NONFLAMMABLE CARBON
: FUSE NONFLAMMABLE FUSIBLE
: RS NONFLAMMABLE WIREWOUND
: RB NONFLAMMABLE CEMENT
COIL
: LF8L 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
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- 19 -