Toshiba 2152 DB Manuale di servizio - Pagina 2

Sfoglia online o scarica il pdf Manuale di servizio per TV Toshiba 2152 DB. Toshiba 2152 DB 6.

Stampa la pagina
TOSHIBA 2152 DB
Service Mode Cont'd
OTHER SERVICE FUNCTION
The following key entry during display of
adjustment menu provides special functions.
TEST SIGNAL SELECTION
Using method
Every pressing of
button changes the test
White balance adjustment
patterns on screen as described below in
White part.
SERVICE MODE.
White balance adjustment/check in light area.
Black part.
Signal off
NTSC signals (14 patterns)
White balance adjustment/check in dark area.
Making. approx. 1Vp-p signal in QA01.
PAL signals
(14 patterns)
Signals
Black cross-bar
About inside signal: The inside signal is output
White cross-bar
at video input terminal from QA01, and is not
output with the pin inserted into terminal.
Picture
(Single color signal can be output.)
Signals
Red single colour
Green single colour
Blue single colour
Using method
Black single colour
Picture position (horizontal, vertical and slant) in
White single colour
CRT adjustment.
Making approx. 1 Vp-p signal in QA01.
Picture
Signals
Black cross-hatch
White cross-hatch
Picture
Using method
Purity and White uniformity of CRT
Red single colour.
Stopping G and B output of Q501
Green single colour.
Stopping R and B output of Q501
Using method
Blue single colour.
Convergence and vertical amplitude adjustment
Stopping R and G output of Q501
Making approx. 1 Vp-p signal in QA01.
Black single colour.
Making black signal of approx. 1Vp-p in QA01
Signals
White single colour.
Black cross-dot
Making white signal of approx. 1Vp-p in QA01
White cross-dot
Signals
Picture
W/B adjustment
Picture
Using method
Convergence adjustment
Making approx. 1Vp-p signal in QA01.
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
2
4. Rotate R350 to show the belt of vertical
retrace. See next figure.
5.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.
ITEMS:
HORIZONTAL POSITION ADJUSTMENT
(HPOS)
VERTICAL POSITION ADJUSTMENT (VPOS)
ADJUSTMENT PROCEDURE:
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
tal or vertical picture position in the center of
screen with VOLUME
Signals
H signal (Left, right, white)
H signal (Left, right, black)
Picture
Using method
For checking (of purity drift) of white uniformity
ITEM:
of CRT H signal (Left, right, white).
VERTICAL AMPLITUDE ADJUSTMENT (HIT)
Check in light area.
H signal (Left, right, black).
ADJUSTMENT PROCEDURE:
Check in dark area.
1. Set the TV in service mode, and get black or
white cross-hatch signal with VIDEO button
The adjustment will be the best, if the time when
on remote hand unit.
unevenness of colour in light area occurs, is a
2. Select HIT (Vertical amplitude) with CHAN-
little longer than that in dark area.
NEL
,
Making approx. 1Vp-p signal in QA01.
amplitude with VOLUME
that vertical amplitude lacks a little.
ITEM:
3. Adjust vertical amplitude with VOLUME
Initialisation of QA02 (Memory)
+ buttons so that the first bar on cross-hatch
signal touches edge of screen.
ADJUSTMENT PROCEDURE:
After replacing QA02, the following initialisation
is required.
1. Call up the adjustment mode display following
the steps 1 and 2.
2. Press the CALL button on the Remote Control
and CHANNEL
buttons on the TV set
simultaneously. The initialisation of QA02 has
been completed.
3. Check the picture carefully. If necessary,
adjust any adjustment item.
Perform "AUTOMATIC SEARCH MEMORY"
ITEM: SUB-BRIGHTNESS (Address: BRTC)
WHITE BALANCE ADJUSTMENT
ADJUSTMENT PROCEDURE:
CUTOFF ADJUSTMENT
1. Set CONTRAST to "00,, and BRIGHTNESS
(RCUT)
to "50" by adjusting user controls.
(GCUT)
2. Set the TV in service mode to get white cross-
(BCUT)
bar of inside pattern.
3. Select BRTC (brightness correction), and
DRIVE ADJUSTMENT
adjust the
- / + button to reduce the value
(GDRV)
so that white portion of inside pattern slightly
(BDRV)
light.
1. Set Contrast to 40, and brightness to +20 by
picture control.
2. Set the TV in service mode, and get the inside
W/B adjusting signal with VIDEO button.
3. Select RCUT, GCUT and BCUT with CHAN-
NEL
,
buttons, to set individual values to
32, and to set GDRV and BDRV to 20 with
VOLUME
- / + buttons.
4. Press
button on the remote control and
rotate Screen VR to get one slight horizontal
line on screen.
Note:Every pressing of
Horizontal line picture and Normal picture
alternately.
5. Press
button to release horizontal line
picture, and select the two other colours
which did not light in the above step with
CHANNEL
,
buttons. Then tap VOLUME
- / + buttons so that three colours slightly
light in the same level.
To correct white balance in light area, select
GDRV and BDRV with CHANNEL
to adjust.
To correct white balance in dark area, perform
fine adjustment of RCUT, GCUT and BCUT.
Light area check (to show white)
,
buttons, and adjust horizon-
- / + buttons.
Dark area check (to show black)
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
MULTI BUS E2PROM ADDRESS, ADJUSTING ADDRESS TABLE
Adjusting QAO2
method
memory
address
S
06B
06C
F
06D
06E
buttons, and adjust vertical
06F
- / + buttons so
070
F
071
S
072
- /
F
073
076
F
077
S
078
079
07A
07B
070
07D
082
083
084
086
087
08E
097
098
099
S
09A
F
09B
S
09E
F
0AF
0B0
S
0B1
0B2
0B3
0B4
0B5
0B6
0B7
S ... semi-fixed data area which is fixed by model. (Do not adjust in field service.) F ... This item may require
adjustments by models after initialization, when QAO2 is replaced.
shown.
(SELF CHECK)
(1)
23904981
(2)
POWER
:
00
(3)
BUS LINE
:
OK
(4)
Bus CONT
:
OK
(5)
BLOCK
:
UV V1 V2
QV01
1) Part number of microcomputer (QA01)
button provides
2) Operation number of protecting circuit ----"00"
is normal. When indication is other than "00",
overcurrent apts to flow, and circuit parts may
possibly be damaged.
3) BUS LINE CHECK ---- "OK" is normal.
"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.
,
buttons
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
and Red
Indicated color of other modes: White
Green: Normal
Red: The microcomputer operates to provide
judgement of no video signal. The red color is
still indicated though the signal is input, failure
may exist in input signal line including QV01.
QV01: In case of indication green --- Normal
In case of indication red with input signal ----
Failure may exist in output line including QV01.
Name
Value of initializing
of
QAO2
Adjustments
item
(Hexa-decimal)
OSD
60
OSD POSITION
OPT
07
OPTION
RCUT
32
R
CUT OFF
GCUT
32
G
CUT OFF
BCUT
32
B
CUT OFF
GDRV
20
G
DRIVE
BDRV
20
B
DRIVE
CNTX
39
SUB CONTRAST MAX
BRTC
40
SUB BRIGHT CEN
COLP
32
SUB COLOUR CEN PAL
COLS
32
SUB COLOUR CEN SECAM
CNTC
2D
SUB CONTRAST CEN
CNTN
20
SUB CONTRAST MIN
BRTX
12
SUB BRIGHT MAX (DIFFERENCE)
BRTN
10
SUB BRIGHT MIN (DIFFERENCE)
COLX
40
SUB COLOUR MAX
COLN
10
SUB COLOUR MIN
5T4
19
SUB SHARP CEN OTHER (TV)
5V4
19
SUB SHARP CEN OTHER (VIDEO)
TXCL
4A
TEXT CONTRAST LEVEL
VM0
05
VCD MODE DATA
WCTL
00
APRO MODE DATA
WON
2D
WOOFER AUTO LOUDNESS
EMX
FC
NICAM ON LEVEL
EMN
64
NICAM OFF LEVEL
FMA
00
FM ATTENUATOR LEVEL
STS
00
STEREO SEPARATION
HPOS
08
50Hz H-POSITION
HPS
04
60Hz/50Hz H-POSITION (DIFFERENCE)
PID
11
PAL IDENT LEVEL
TRP
01
CROMA TRAP f0
DLY0
07
Y DELAY TV SECAM (BG)
DLY1
07
Y DELAY TV SECAM (OTHER)
DLY2
07
Y DELAY VIDEO SECAM
DLY3
04
Y DELAY TV OTHER (BG)
DLY4
04
Y DELAY TV OTHER (DK, I)
DLY5
05
Y DELAY TV OTHER (M,N)
DLY6
05
Y DELAY TV OTHER (VIDEO)