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TOSHIBA 2163 DB
Adjustments Cont'd
OTHER SERVICE FUNCTION
The following key entry during display of
adjustment menu provides special functions.
Signals:
TEST SIGNAL SELECTION
• W/B adjustment
Every pressing of
button changes the test
Picture:
patterns on screen as described below in
SERVICE MODE.
Signal off
NTSC signals (14 patterns)
PAL signals (14 patterns)
Using method:
• About inside signal: The inside signal is output
at video input terminal from QA01, and is not
White balance adjustment
White part....
output with the pin inserted into terminal.
(Single color signal can be output.)
White balance adjustment/check in light area
Black part....
Signals:
White balance adjustment/check in dark area
• Black single color
Making. approx. 1Vp-p signal in QA01.
• White single color
• Picture
Signals:
• Using method
• Black cross-bar
• White cross-bar
Picture:
Picture:
Using method:
Purity and White uniformity of CRT
Using method:
Black single color....
Picture position (horizontal, vertical and slant) in
Making black signal of approx. 1Vp-p in QA01
CRT adjustment. Making approx. 1 Vp-p signal
in QA01.
White single color....
Making white signal of approx. 1Vp-p in QA01
Safety Instuctions / Installation & Service Adjustments / Adjustments Cont'd / Safety Parts / Service Mode / Electrical Adjustments ...Cont'd
2
Signals:
• Black cross-hatch
• White cross-hatch
Picture:
Using method:
Convergence and vertical amplitude adjustment.
Making approx. 1 Vp-p signal in QA01.
Signals:
• Black cross-dot
• White cross-dot
Picture:
Using method:
Convergence adjustment.
Making approx. 1Vp-p signal in QA01.
Signals:
• H signal (Left, right, white)
• H signal (Left, right, black)
Picture:
Using method:
For checking (of purity drift) of white uniformity
of CRT.
H signal (Left, right, white)....Check in light area.
H signal (Left, right, black)....Check in dark area
The adjustment will be the best, if the time when
unevenness of color in light
area occurs, is a little longer than that in dark
area. Making approx. 1Vp-p signal in QA01.
Electrical Adjustments
ITEM:
SUB-BRIGHTNESS (Address: BRTC)
Note: Constrict the picture height until the
vertical retrace line appears adjusting the
address HIT (HEIGHT).
ADJUSTMENT PROCEDURE:
1. Set CONTRAST to "00,, and BRIGHTNESS
to "50" by adjusting user controls.
2. Set the TV in service mode to get white cross-
bar of inside pattern.
3. Select BRTC (brightness correction), and
adjust the
- / + button to reduce the value
so that white portion of inside pattern slightly
light.
4. Adjust
- / + button to increase the data
value of BRTC, and set it just before the
difference between the belt of vertical retrace
and the border of black portion of inside
pattern is visible. After that, return vertical
height and contrast.
AV Diagram / Differences Table / Main Diagram / Text Diagram / CRT Diagram
ITEM:
To correct white balance in light area, select
GDRV and BDRV with CHANNEL
HORIZONTAL POSITION ADJUSTMENT
(HPOS)
to adjust.
To correct white balance in dark area, perform
VERTICAL POSITION ADJUSTMENT (VPOS)
fine adjustment of RCUT, GCUT and BCUT.
1. Set the TV in service mode, and get black or
white cross-bar signal with VIDEO button on
remote hand unit.
2. Select either HPOS (Horizontal picture
phase) or VPOS (Vertical picture phase) with
CHANNEL
,
buttons, and adjust horizon-
tal or vertical picture position in the center of
screen with VOLUME
- / + buttons.
SELF DIAGNOSTIC FUNCTION
1) Press "9" button on Remote Control during
display of adjustment menu. The diagnosis
will begin to check if interface among IC's are
executed properly.
2) During diagnosis, the following displays are
shown.
(SELF CHECK)
(1)
2390XXXX
VERTICAL AMPLITUDE ADJUSTMENT (HIT)
(2)
POWER
(3)
BUS LINE
1. Set the TV in service mode, and get black or
(4)
Bus CONT
(5)
BLOCK
white cross-hatch signal with VIDEO button
on remote hand unit.
2. Select HIT (Vertical amplitude) with CHAN-
1) Part number of microcomputer (QA01)
NEL
,
buttons, and adjust vertical
2) Operation number of protecting circuit ----"00"
amplitude with VOLUME
- / + buttons so
is normal. When indication is other than "00",
that vertical amplitude lacks a little.
overcurrent apts to flow, and circuit parts may
3. Adjust vertical amplitude with VOLUME
- /
possibly be damaged.
+ buttons so that the first bar on cross-hatch
3) BUS LINE CHECK ---- "OK" is normal.
signal touches edge of screen.
"SDA1-GND" means that SDA line is shorted
to ground.
"SCL1-GND" means that SCL line is shorted
to ground.
"SCL1-SDA1" means that SDA line is shorted
to SCL line.
4) BUS CONT----"OK" is normal.
When indication shows "Q OOO NG", the
device with the number may possibly be
damaged.
5) BLOCK
UV : TV reception mode
V1: VIDEO 1 input mode (~ ~1)
V2 : VIDEO 2 input mode (~ ~2)
Indicated color of mode now selected: Green
WHITE BALANCE ADJUSTMENT
and Red Indicated color of other modes :
White
CUTOFF ADJUSTMENT
(RCUT)
Green: Normal
(GCUT)
Red: The microcomputer operates to provide
(BCUT)
judgement of no video signal. The red color is
still indicated though the signal is input, failure
DRIVE ADJUSTMENT
may exist in input signal line including QV01.
(GDRV)
QV01: In case of indication green --- Normal
(BDRV)
In case of indication red with input signal ---
Failure may exist in output line including QV01.
1. Set Contrast to 40, and brightness to +20 by
picture control.
NOTE: Component which controls character
2. Set the TV in service mode, and get the inside
display on screen is QT01 (TELETEXT IC). If
W/B adjusting signal with VIDEO button.
this display function fails to operate due to
3. Select RCUT, GCUT and BCUT with CHAN-
damage in QT01, self diagnosis procedure is as
NEL
,
buttons, to set individual values to
follows.
32, and to set GDRV and BDRV to 20 with
VOLUME
- / + buttons.
1) In case that power indicator is blinking with
4. Press
button on the remote control and
interval of 0.5 seconds; it means protecting
rotate Screen VR to get one slight horizontal
circuit (Current limiter) is operating, and circuit
line on screen.
components may possibly be damaged.
Note:Every pressing of
button provides
Check related components.
Horizontal line picture and Normal picture
2) In case that power indicator is blinking with
alternately.
interval of 1 second; Protecting circuit does
5. Press
button to release horizontal line
not operate, but a part of Bus line does not
picture, and select the two other colors which
operate normally. Check Bus line.
did not light in the above step with CHANNEL
,
buttons. Then tap VOLUME
- / +
buttons so that three colors slightly light in the
same level.
Item: Slave address 36 [BRTC]
,
buttons
Name: SUB BRIGHT CENTER
Setting: (User control)
Contrast: MAX
Light area check (to show white)
Bright : CENTER
Color : MIN
Input signal: Sub-bright signal
Measurement point: Screen adjustment
Dark area check (to show black)
Adjustment procedure:
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.
Adjustment standard: 4±1.5
Item: Slave address 3B [SCNT]
Name: SUB CONTRAST
:
00
Setting: (User control)
:
OK
:
OK
:
UV V1 V2
Contrast: MAX
QV01
Bright : CENTER
Color : MIN
Input signal: Sub-bright signal (PAL)
Measurement point: IC501 #12... (B-OUT)
Adjustment procedure:
1. Select slave address 3B [SCNT].
2. When [SCNT] is selected, 0-signal is muted
and only B,W signals are outputted.
3. Adjust amplitude of white level from pedestal
level of Y-signal.
Adjustment standard:1.25V(p-p) ± 0.15V(p-p)
Item: Slave address
20 [RCUT]
31 [GCUT]
32 [BCUT]
Screen VR
Name:
R cut-off
G cut-off
B cut-off
Screen
Setting: (User control)
RCUT
)
GCUT
40 Hexa-decimal
BCUT
)
GDRV
80 Hexa-decimal
BDRV
Select horizontal line mode by pressing
button on the remote control in service mode.
Measurement point: Screen adjustment
Adjustment procedure:
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
button on the remote control to
escape from the horizontal line mode.
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