TOSHIBA – 2989UE / 2989UH / 2989XP
Entering into service mode
Press [Mute] button once on the remote control handset.
Once again press and hold remote handset [mute] button.
While keeping the Mute] button pressed, press [Menu] button on TV set.
Displaying the adjustment menu
Press [menu] button on the TV set to shift from adjustment mode to service mode and vice versa.
Service mode keys
Select adjustment item by pressing the [channel+] or [channel-} button on the remote control handset.
Adjust data value by pressing the [Volume+] or [Volume-] button on the remote control handset.
Cancellation of service mode
To return to normal TV mode, press Power] / [Standby] button to turn off TV once
Service mode adjustments
Following adjustments items will appear on the screen.
Item Name of adjustment Reference data
R CUT R CUTOFF B/W 40H
G CUT G CUTOFF 40H
B CUT B CUTOFF 40H
GDRV G DRIVE 40H
BDRV BLUE DRIVE 40H
CNTX SUB-CONTRAST MAX(4:3 MODE) 7FH
BRTC SUB BRIGHT CEN 7FH
COLC SUB COLOR CEN NTSC 39H
TNTC SUB TINT GEN 40H
COLP SUB COLOUR CEN PAL 39H
COLS SUB COLOUTR CEN SECAM 27H
SCOL SUB COLOUR 13H
SCNT SUB CONTRAST 2H
VOLS VOL SCART 75H
FVOL FM VOL PRE SCALE 15H
NVOL NICAM VOL PRE SCALE 3AH
NICL NICAM THRESHOLD LEVEL 03H
NICH NICAM THRESHOLD LEVEL 0AH
IDL IGR THRESHOLD LEVEL 04H
IDH IGR THRESHOLD LEVEL 0EH
EVOL EXT PRE VOLUME 01H
EMX NICAM ON LEVEL FCH
EMN NICAM ON LEVEL 64H
FMA FM ATTENNUATOR LEVEL 00H
STS STEREO SEPERATION 00H
HPOS 50HZ HORIZONTAL POSITION FEH
VPOS V-POSITION 0DH
HIT HEIGHT 3EH
VLIN V-LENEARITY 17H
VSC V-S CORRECTION 18H
VPS V-SHIFT 0CH
VCP V-COMPENSATION 07H
WID PICTURE WIDTH 18H
PARA E-W PARABOLA 22H
CNR E-W CORNER 04H
TRAP TRAPEZIUM 0FH
HCP H-COMPENSATION 01H
VFC V-F CORRECTION 0FH
BELL SECAM BELL FILTER 80H
SRY SECAN R-Y 08H
SBY SECAM B-Y 08H
INITILIZATION OF MEMORY DATA OF QA02
After replacing IC the following initialization is required.
Enter the service mode then select any register item.
Press and hold the [call] button on the remote then press the [channel+] button on the TV. The initialization of IC has been completed.
Check the picture carefully. If necessary, adjust any adjustment item as explained below.
Perform auto search memory as explained in the owner’s manual.
CAUTION:- Never attempt to initialize the data unless memory IC has been replaced.
Test signal selection
In the service mode, pressing of [AV] / [Video] button shows the test patterns on screen. Every pressing of [AV] / [Video] button cycle through 14 NTSC test patterns and 14 PAL test patterns.
Some of the test patterns are:
Red single colour, green single colour, blue single colour
Black single colour, white single colour
White balance adjustment pattern
Black cross- bar, white crossbar
Black crosshatch, white cross hatch
Black cross dot, white cross dot, h signal etc.
White balance adjustment
Cutoff adjustment [RCUT] [GVUT] [BCUT]
Drive adjustment [GDRV] [BDRV]
- Set contrast to 40, and brightness to +20 by picture control.
- Set the TV in service mode, and get the inside W/B adjustment signal with [AV/Video] button.
- Select R CUT, G CUT, AND B CUT with [Channel+/-] buttons, to set individual values to 32, and to set GDRV and BDRV to 20 with [Volume+/-] buttons.
- Press [-/--] button on the remote control and rotate screen VR to get one slight horizontal line on screen.
- Every pressing of [-/--] button provides horizontal line picture and o\normal picture alternately.
- Press [-/--] button to release horizontal line picture, and select the two other colours which did not light in the above step with [CHANNEL+/-]. Then tap [Volume+/-] buttons so that three colors slightly light in the same level..
- To correct white balance in light area, select GDRV and BDRV with [CHANNEL+/-] buttons to adjust.
- To correct white balance in dark area, perform fine adjustment to RCUT, GCUT and BCUT.
Self-diagnostic function.
- Press [9] button on the remote control during display of adjustment menu.
- The diagnosis will begin to check if interfaces among ICs are executed properly.
During diagnosis the following displays are shown.
-----------------------------------------------------------------------
<Self check>
2390****
power 00
bus line OK
bus cont OK
block UV V1 V2
QV01
------------------------------------------------------------------------
Values 1-5 are explained below
Part number of micro control
- Operation number of protecting circuit-“00” is normal. When indication is other than “00”, over-current apts to flow, and circuit parts may possibly damaged.
BUS LINE CHECK OK NORMAL
“SDA 1- GND” means that SDA line is shorted to ground
“SCL - GND” means that SCL line is shorted to ground.
“SCL 1-SDA 1” means that SDA line is shorted to SCL line
bus cont “OK” is normal
When indication shows “Q000 NG”, the device with the number may possibly damage.
Block
UV-TV reception mode
V1-VIDEO 1 INPUT MODE (AV1)
V2-VIDEO2 input mode (AV 2)
Indicated colour of mode now selected: Green and Red.
Indicated colour of other modes: White.
Green ; Normal
Red : the microcomputer operates to provide judgment of no video signal. The red
QV01: In case of indication green-normal. In case of indication red with input signal -
TOSHIBA – 2150 / 2876DD / 2988DG
Entering into service mode.
Press [Mute] button. Press and hold [Mute] button and press [Menu] on local keyboard.
Service mode keys
Select [PR+/-], adjust [VOL+/-],Store; [Auto], test picture [AV]
Cancellation of service standby.