Haier HT-3768, Service Manual

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and filtered via VD515 and C542 to 25V direct current voltage to supply
the vertical scan IC. The pulse voltage output from (14) is rectified and filtered via
VD513 and C532 to 15V direct current voltage. +12V direct current
voltage output from N506 (3), after rectification of the secondary source, +9V and
+5v are supplied to the decoder chip. And CPU. The voltage of VT comes from
the main voltage.
B. Service mode and adjusting items and data
1.Factory adjustment information
Operation method: after the appliance is switched on, make the volume value to
zero. Then press “ ” key on the TV set and press the DISP button on remote
controller at the same time to enter the S state. Press DISP button one times and
“S” will disappear, Repeat the first step, you will enter the D mode. Now one “D”
is displayed on the TV screen.
Press PRO- and PRO+ buttons to select items for adjustment.
Press VOL- and VOL+ buttons to adjust selected items.
Press the POWER button to switch off the appliance and go back to the normal
state.
Maintenance menu (Table 8)
Item Specifications Default Value
Variable
Mark
RCUT RED CUT OFF BALANCE 20
*
GCUT GREEN CUT OFF BALANCE 20
*
BCUT BLUE CUT OFF BALANCE 20
*
GDRV GREEN DRIVE BALANCE 40 *
BDRV BLUE DRIVE BALANCE 40 *
CNTX CONTRAST MAX VALUE 3F
BRTC BRIGHTNESS 48
COLC NTSC COLOUR CENTER VALUE 40
TNTC TINT CENTER VALUE 40
COLP PAL COLOUR CENTER VALUE 20
COLS SECAM COLOUR CENTER VALUE 40
SCNT SUB CONTRAST 0B
CNTC SUB CONTRAST CENTER VALUE 30
CNTN SUB CONTRAST MIN VALUE 00
BRTX SUB BRIGHTNESS MAX VALUE 30
BRTN SUB BRIGHTNESS MIN VALUE 30
COLX SUB COLOUR MAX VALUE 35
COLN SUB COLOUR MIN VALUE 00
TNTX SUB TINT MAX VALUE 28
TNTN SUB TINT MIN VALUE 28
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