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TB1240 + TCLM34 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 "0" key on the remote handset three times.
"D" letter on the screen indicated that the factory mode was entered. Now 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 "MODE0" 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 OFF" key. It can cut off the I
the CPU to other IC. This is only useful when automatic adjustment of white balance.
3. All system data in menu of "key 7" must keep unchanged when servicing. Otherwise, the set may not
work properly.
Setting method:
No Adjustment
Data Name (default
Items
value inside blanket)
1
Screen
voltage
2 Focus voltage
3
VCO
Conditions and
input signal
------------
"IRGB cut off"
must set to 80 (all
------------
Cross hatch
------------
Apply an IF
signal (see tuner
frequency) to the
Setting method (need enter D-mode)
Press "-/--" key on the remote handset and
the screen will become a horizontal line.
pattern)
Then adjust the "screen" VR on the
flyback until the horizontal line can just be
seen (minimum visible intensity).
Adjust the "focus" VR on the flyback until
pattern.
the screen becomes clear.
Monitor the DC voltage at pin 48 of
IC201, then adjust T271 until the voltage at
spec. for
pin 48 become 4.62 +/- 0.02 V.
Press the AFT button on the factory remote
IF input.
and AFT adjustment will be done
automatically.
2
C control from
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