PRODUCT : CTV
PCB/ASSY :FA
Roadstar
SHEET : 1 OF 1
RAW MATERIAL / CONSUMABLES :
JIGS / FIXTURE INSTRUMENTS :
PREPARED BY
SR N STOCK NO
LOC DESCRIPTION
QPS
SERVICE REMOTE
1
TV SET
1
FEVIBONAD
2
INSULATED SCREW
CHECKED BY
3
DRIVER
NOTE : WARM UP THE TV SET FOR AT LEAST 20 MINUTES ( DURING SOAKING AREA)
1
SELECT DIGITAL / RETMA / LION HEAD PATTERN ,
2
PRESS "MENU+6483" KEYS SEQUENCE TO ACCESS THE MANUFACTURING MODE.
3
PRESS KEY '3' TO APPEAR 'SERVICE MENU 3' ON SCREEN.
4
SELECT PARAMETER "SC " BY PRESSING CHANNEL UP/DN KEY .
5
PRESS 'VOL UP' KEY THEN A THIN HORIZONTAL LINE WILL BE DISPLAYED ON SCREEN.
6
ADJUST THE SCREEN INTENSITY BY VARYING SCREEN POT OF FBT USING INSULATED SCREW DRIVER UNTIL A THIN HORIZON
LINE IS JUST VISIBLE.
7
PRESS "VOL DN" KEY TO APPEAR ORIGINAL PATTERN.
8
APPLY THE FEVIBOND ON "SCREEN" POT. OF FBT.
PRODUCT : CTV
STAGE: FOCUS AND CONVERGENCE
PCB/ASSY : F.A.
Roadstar
SHEET : 1 OF 1
RAW MATERIAL / CONSUMABLES :
JIGS / FIXTURE INSTRUMENTS :
PREPARED BY
SR N STOCK NO
LOC DESCRIPTION
QPS
SERVICE REMOTE
1
TV SET
1
GLUE
2
PNUE. SCREW DRIVER
CHECKED BY
3
FEVIBONAD
INSULATED SCREW
APPROVED BY
DRIVER
TIGHTENING TORQUE OF SCREW DRIVER- 10 TO 15 kg.cm and TV SET IS FACING TOWARDS EAST.
FOCUS ADJUSTMENT :-
1
SELECT LION HEAD PATTERN.( EU 5CH) . CHOOSE SELECTABLE PICTURE MODE "STANDARD".
2
ADJUST THE FOCUS KNOB ON FBT USING INSULATED SCREW DRIVER , SO THAT '30' AT THE DIAGONAL CENTRE ON LION HEA
WILL GET AS SHARP AS POSSIBLE.
THIS SYMBOL INDICATES THE LOCATION OF FOCUS ADJUSTMENT CHECK ON SCREEN.
CONVERGENCE ADJUSTMENT :-
1
SWITCH OVER TO CROSS HATCH PATTERN.
2
BY TURNING THE 4 POLE MAGNET, MATCH THE RED AND BLUE LINES AT THE CENTRE. SHIFT THE RED AND BLUE LINE
OVER THE GREEN LINE BY USING 6 POLE MAGNET.
3
TIGHTEN THE CPM LOCK. BE CAREFUL NOT TO MOVE THE OTHER RINGS/MAGNETS AT THIS TIME.
4
CHECK AND ADJUST THE PICTURE FOR TILT.ADJUST THE TILT BY ADJUSTING THE YOKE.
5
APPLY GLUE ON BOTH SCREEN AND FOCUS KNOB OF FBT AFTER ADJUSTMENT OF FOCUS.
FOR TFT CPT MODELS: TILT=0 mm
TILT CHECK
FOR CONVENTIONAL CPT MODELS: TILT=2 mm
FOCUS CHECK
NOTE: DO NOT TOUCH TO ANY PART OF FBT.
PRODUCT : CTV
STAGE: CONVERGENCE
PCB/ASSY : F.A.
Roadstar
SHEET : 1 OF 2
RAW MATERIAL / CONSUMABLES :
JIGS / FIXTURE INSTRUMENTS :
PREPARED BY
SR N STOCK NO
LOC DESCRIPTION
QPS
SERVICE REMOTE
1
TV SET
STAGE: SCREEN ADJUSTMENT
CONVERGENCE ADJUSTMENTS
NOTE : Before attempting any convergence adjustments, the
receiver should be operated for at leat fifteen minutes.
CENTER CONVERGENCE ADJUSTMENT :
1.Select the Cross-hatch pattern (EU 4CH) .
2.Set the brightness and contrast for well defined
pattern.
3. Adjust two tabs of the 4-Pole magnets to change the
angle between them . ( See fig.-01 & 02) and
superimpose red and blue vertical lines in the center
area of picture screen.
4.Turn the both tabs at the same time keeping the angle
constant to superimpose red and blue horizontal
lines at the center of the screen. (See fig-04 & 02)
5.Adjust two tabs of 6-Pole magnets to superimpose
red/blue line and green one .Adjusting the angle
affects the vertical lines and rotating both magnets
affects the horizontal lines.
6.Repeat adjustments 3,4,5 keeping in mind red, green
and blue movement , because 4-Pole Magnets and 6-
Pole Magnets have mutual interaction and make line
movement complex
CIRCUMFERENCE CONVERGENCE ADJUSTMENT:
1. Loosen the clamping screw of deflection yoke slightly to allow the
yoke to tilt.
2.Temporarily put a wedge as shown in fig1. ( Do not remove cover
paper on adhesive part of the wedge.)
3.Tilt front of the deflection yoke up or down to obtain better
convergence in circumference (see fig.3). Push the mounted
wedge in to the space between picture tube and the yoke, to fix
the yoke temporarily.
4.Put other wedge in to bottom space and remove the cover paper to
stick.
5.Tilt front of the yoke right or left to obtain better convergence in
circumference. (see fig.3)
6.Keep the yoke position and put another wedge in either upper
space. Remove cover paper and stick the wedge on picture tube to
fix the yoke.
7.Detach the temporarily mounted wedge and put it in another upper
space.Stick it on picture tube to fix the yoke.
8.After fixing three wedges , recheck overall convergence. Tighten
the screw firmly to fix the yoke and check the yoke is firm.
9.stick three adhesive tapes on wedges as shown in fig.o.
THIS HORIZONTAL
LINE MATCHING
WITH EXPOSURE
POINTS
EXPOSURE POINTS
ON THE SCREEN
EXPOSURE POINTS
ON THE SCREEN
THIS HORIZONTAL
LINE MATCHING WITH
EXPOSURE POINTS
2
