TCL M68 chassis alignment instruction
Enter factory mode in production line
Simply press the D-mode key on the factory remote handset.
Enter service mode
Press and hold the VOLUME DOWN key tightly on the unit until minimum level and don’t release the
VOLUMN DOWN key, then press the CAPS key on the remote handset.
After the factory mode was entered,you can use the shortcut key to access the factory menu. All
change in factory data will save in EEPROM automatically
Note:
1. You can disable the D-Mode key (on factory remote handset) by change “bit-0” of “mode1” to “0”.
If the D-Mode key was disabled, you can’t enter D-Mode by the D-mode key on the factory remote
(but you can still enter service mode). It is suggested to disable the D-Mode key before the set
leave the factory.
2. On the factory remote handset, you can find the “BUS OPEN” key. It can cut off the I
2
C control
from the CPU to other IC. This is only useful when automatic adjustment of white balance.
3. All system data in menu of “key 8&9” must keep unchanged when servicing. Otherwise, the set
may not work properly.
Setting method:
No Adjustment
Items
Data Name (default
value inside blanket)
Conditions and
input signal
Setting method (need enter D-mode)
1 Screen
voltage
------------
“IRGB cut off”
must set to 80 (all
pattern)
Press “MUTE” key on the remote handset
and the screen will become a horizontal
line. Then adjust the “screen” VR on the
flyback until the horizontal line can just
be seen (minimum visible intensity).
2 Focus voltage
------------
Cross hatch
pattern.
Adjust the “focus” VR on the flyback
until the screen becomes clear.
3 Key
2
(Vertical
geometry for
PAL system)
5VPOS(45)
5VAM(50)
5VSL(39)
5VL(30)
5VSC(31)
5SCL(25)
5WBF(4)
5WBR(5)
Input a PAL cross
hatch pattern.
Adjust 5VPOS for vertical position
Adjust 5VAM for vertical amplitude.
Adjust 5VSL for vertical slope.
Adjust 5VL for vertical linearity
(Normally use default value)
Adjust 5SCL for vertical S-correction
Adjust 5WBR for start of blanking time
on 4:3 mode (16:9tube)
Adjust 5WBF for end of blanking time on
4:3 mode (16:9tube)
