Toshiba 2152 DB Instrukcja serwisowa - Strona 3

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TOSHIBA 2152 DB
ADJUSTMENT OF VIDEO-CHROMA SYSTEM
(Factory Adjustment)
Model Name: S5E
Item
Name
Setting(User control)
Input signal
Measurement point
Slave
SUB
Contrast: MAX
Sub-bright
Screen
address 36
BRIGHT
Bright: CENTER
signal
adjustment
[BRTC]
CENTRE
Color: MIN
Slave
SUB
Contrast: MAX
Sub-bright
IC501
address 39
COLOUR
Bright: CENTER
signal
#23...
[COLP]
PAL
Color: CENTER
(PAL)
(B-OUT)
Slave
Screen
address
adjustment
20[RCUT]
R cut-off
RCUT 32 Hexa-decimal
31[GCUT]
G cut-off
GCUT 32 Hexa-decimal
32[BCUT]
B cut-off
BCUT 32 Hexa-decimal
Screen VR
Screen
GDRV 20 Hexa-decimal
BDRV 20 Hexa-decimal
Select horizontal line mode by
pressing -I- - button on the remote
control in service mode.
30[RCUT]
R cut-off
Contrast: MAX
White, etc.
Screen
31[GCUT]
G cut-off
Bright : CENTER
adjustment
32[BCUT]
B cut-off
Color : CENTER
33[GDRV]
G drive
34[BDRV]
B drive
(White
balance)
Slave
ID
VIDEO
Pin 52 of IC501
address
ref
No input
F0 PID
Slave
Chroma
Contrast: MAX
PAL
Pin 23 of
address
trap f
Bright : MIN
colour bar
IC501
0
F1 TRP
adjusting
Colour: MIN
(B-OUT)
Safety Instructions / Safety Parts / Service Adjustments / Service Mode General Instructions / Service Mode Cont'd / Test Signal Selection
Adjustment of Video Chroma System / CRT Diagram / Text Diagram / AV Diagram / Main Diagram / Main Diagram Cont'd
3
Adjustment procedure
Adjustment standard
5 ± 1.5
1. This adjustment must be done
after [BRTC], screen VR and white balance adjustments
have been completed.
2. Adjust number of black collapse lines of sub-bright
signal.
1. Select slave address 39
1.4V(p-p)
± 0.2V(p-p)
[COLP].
2. When [COLP] is selected, Y-signal is muted
and only color signals are outputted.
3. Adjust amplitude of the upper half of the colour
bar output.
1. Set the controls as shown in
the left column.
2. Gradually increase the screen
VR (T461) until one of R, G or B line begins
to brighten slightly.
3. Determine the position of the screen VR here.
4. Adjust RCUT, GCUT and BCUT, brighten other lines
until they begin to light slightly.
(Adjust DATA so that the line becomes almost white.)
5. Press -I- - button on the remote control to escape from the
horizontal line mode.
1. This adjustment must be done
HIGH LIGHT;
after adjustment of the above-
(103cd/m
3
)
mentioned cut-off and screen
7195K
VR's have been completed.
-0.005uv [BDRV]
2. Adjust cut-off and drive DATA
DARK;
3
alternately.
(17cd/m
)
7695K ± 0uv
3. Use a checker to adjust
brightness by changing modulation factor.
1. Connect a resistor 220k ohm
2.0V DC
± 0.1V DC
across pin 52 of IC501 and
GND and connect digital
voltmeter.
2.Select slave address F0 PID.
3.Adjust DC voltage.
1.Select slave address F1 TRP
Chroma level:
2. Adjust chroma trap so that
MIN
chroma level at pin 23 of
IC501 becomes minimum.
CRT Diagram
Text Diagram