Daewoo DTT3250, DTT3250MT CTV - How to enter service mode, adjustments, SMPS, deflection and audio output circuit diagram
STR X6757 (SMPS control), TDA8172A (Vertical output IC), BSC29-0185F (FBT)
THE ADJUSTMENT METHOD OF CP-750 WITH USER ROMOTE CONTROLLER (R-49C05)
Service Mode
To enter the service mode, press Red button and Green button and MENU key on (Ch.91)
Service Mode 1 is displayed.
To enter the service mode, press Red button and Green button and MENU key on (Ch.91)
Service Mode 1 is displayed.
Press MODE key.
Service Mode 2 is
displayed.
CONTROL KEY
MENU - Return to former step
OK - Exit service mode
PR ▲/▼ - Select item
VOL ▲/▼- Change value or condition
SCREEN
ADJUSTMENT
Service Mode 1 > DDPC 3316_1 > Screen
Adjust Screen Volume of FBT until the horizontal line is just disappeared.
FOCUS ADJUSTMENT
Adjust with the Focus volume on the FBT until you get the most clear resolution of 350 line
and corner of screen.
Focus volume on the FBT is consisting of two parts - vertical focus and horizontal focus.
WHITE BALANCE ADJUSTMENT
Service Mode 1 > DDPC 3316_1 > Screen
Adjust Screen Volume of FBT until the horizontal line is just disappeared.
FOCUS ADJUSTMENT
Adjust with the Focus volume on the FBT until you get the most clear resolution of 350 line
and corner of screen.
Focus volume on the FBT is consisting of two parts - vertical focus and horizontal focus.
WHITE BALANCE ADJUSTMENT
Service Mode 1 > Tube Measurement > WD_R, WD_G
Adjust R,G bars in the high beam on the instrument may be located in the center.(B DRV is Fixed.)
(2) Low-Beam Adjustment
Service Mode 1 > Tube Measurement > CUT_R, CUT_G
Adjust R,G bars in the low beam on the instrument may be located in the center.(B BIAS is Fixed.)
[The reference coordinates are X = 288, Y = 302”]
PWB bottom view, SMPS and deflection schematic
Adjust R,G bars in the low beam on the instrument may be located in the center.(B BIAS is Fixed.)
VERTICAL CENTER Adjustment
Service Mode 1 > Vertical Geometry > Ver. Center
Adjust to harmonize RETMA pattern’s upper marking with Lower marking.
VERTICL SIZE Adjustment
Service Mode 1 > Vertical Geometry > Ver. Size
Adjust so that the Upper and the Lower ‘4’ marks of the RETMA pattern may be located at the boundaries of the screen.
HORIZONTAL CENTER Adjustment
Service Mode 1 > Hor. Geometry > Hor. Center
Adjust to harmonize the position of RETMA pattern’s Left side with Right side.
HORIZONTAL WIDTH Adjustment
Service Mode 1 > Hor. Geometry > Hor. Width
Adjust so that the Left and the Right ‘5’ marks of the RETMA pattern may be located at the boundaries of the screen.
PINCUSHION Adjustment
(1) Parabola Adjustment
Service Mode 1 > Hor. Geometry > Cushion
Adjust so that the Left and Right edge’s vertical line may be straight.
(2) Corner Top/Bottom or Top 6th/Bottom 6th
Service Mode 1 > Hor. Geometry > Corner Top/Corner Bottom or Corner Top 6th/Corner Bottom 6th
Adjust so that the Upper and the Lower corner’s vertical line may be straight.
(3) Trapeze Adjustment
Service Mode 1 > Hor. Geometry > Trapeze
(4) Angle Adjustment
Service Mode 1 > Hor. Geometry > Angle
(5) Bow Adjustment
Service Mode 1 > Hor. Geometry > Bow.