Daewoo DTQ21A24N, DAEWOO DTQ21A35R – NTSC CRT Color TV - TMPA8895 - How to enter service mode, adjustments, circuit diagram

Used ICs - TMPA8895, TA1343, LA78041(Vertical scan output), BSC25-NXXX(FBT), 5Q1265RT(STR), AN17821A(Audio output), 2SC5296(Horizontal scan output transistor) 

TMPA8895CSNG7FU7 (NTSC)  ADJUSTMENT

ENTER FACTORY MODE - Uses the factory's remote controller

Press “D-mode” key three time (factory key) to enter factory’s adjustment menu.
At first enter “D-mode”. 

Press “DISP” enter again WHITE BALANCE mode. 

Press again “DISP” enter factory mode.
Hold the volume minus at the keyboard until sound volume down to zero. 

Press again “DISP” enter “D-mode”

ENTER FACTORY MODE F7~F15

Press “2483”,”6483”,”6568” enter F7, and also open F8-F15. 

Press “Mute” Key to turn Page Up and “RETURN” key to turn Page Down for factory mode menu. 

Press figure Key 1 2 3 4 5 6 7 to enter “factory” mode F1~F7.

Press figure key “0” to enter WHITE BALANCE mode.

EXIT FACTORY MODE
1 Press “D-mode” or “DISP” to exit from the “factory” menu.
2 Press power switch, exit “factory’s mode.

EXPLANATION FOR ADJUSTMENT SPEED KEY

After entering factory mode, some remote controller key function will change to suit for the production adjustment.

1) Press “MUTE” key to turn page up, press “RETURN” key to turn page down.

 Press “MENU” to choose adjustment item in pageF10 F14 F15 .

2) Press “CH+” and “CH-“ key to select item, and press “VOL+” and “VOL-” key to change data value.

3) Press “SLEEP” key to display CHIP inner 8 kinds test signal. That is black signal, white signal, cross signal and pane signal.

Circuit Diagram (Schematic) [Click on the pictures to Zoom in)

AGING MODE

1) With factory remote controller to press “D-mode” directly enter AGING mode, screen will display “factory”. 

Press “DISP” key to exit “factory” to enter “WHITE BALANCE”.

2) At TV mode, With user remote controller, press the “MENU” key to turn to “TUNING” menu, 

Press number keyboard in 6 seconds “2483”, “6483”, “6568”, then enter AGING mode. 

At AV mode, direct press number keyboard “2483”, “6483”, “6568”, then enter factory LOGO debugging.
At “AGING” mode, Press “MENU” to display main Menu to adjust all data.

WHITE BALANCE MODE
1) At AGING mode, press “D-mode” exit “factory” and to enter WHITE BALANCE mode.
2) Press “D-mode” key two time (factory key) to enter WHITE BALANCE mode.
3) At “factory” mode, press figure key “0” enter WHITE BALANCE mode.
4) At WHITE BALANCE mode, press “MUTE”. One horizontal bright line will appear on screen.

Use “1,4” key to adjust RCUT, “2,5” key to adjust GCUT, “3,6” key to adjust BCUT.