Daewoo DTQ 29U1SC, Daewoo DTQ 29U5SC – How to enter the service mode, adjustments, full schematic and more – Chassis CN 794N

Used ICs: LC86386A 51S2-System control, 24C16B, 115 V F025AR-Tuner, MR2540-SMPS controller STR, LA7848-Vertical scan output IC, VDP3130Y-Luminance Chroma jungle, MSP3420G B8, TDA8946-Audio output IC, TEA5101B-Video output IC (CRO controller), FF A9404 8L-FBT, 2SD2578-Horizontal Out Transistor,

How to enter the service mode using the user remote control.

• Turn the set on.

• Direct the remote control to the reception window of TV.

• Push buttons of remote control in sequence as follows.

[1 > MUTE > DISPLAY > MUTE ]

• Then, the screen will appear as follows.

S2      SCRN

S5      SND

S6      GEO

S7      VDP

S8     W/B

S9     DP

S12    FACT

Using the channel up or channel down button, select the item you wish to adjust.

(The colour of selected item turns into the RED.)

• Press the volume up or down button to enter in the service mode you wish to adjust.

How to memorize the adjusted values in the service mode.

• Press the DISPLAY button the state which the screen is displaying each of service menus after all adjustments are complete each of all service menu.

Screen adjustment (S2)

• Enter the service mode and select service adjustment S2.

• You can see the one horizontal line on the screen.

• Adjust the Screen Control Volume (located on FBT) so that the horizontal line on screen just disappeared.

• Press the volume up or down button to exit in the screen adjustment mode.

[IN THE SCREEN ADJUSTMENT MODE, DONT PRESS OTHER BUTTONS EXCEPT VOLUME UP OR DOWN BUTTON.]

Focus adjustment

• Turn in a local station and adjust the Focus Control knob (located on FBT) for best picture details at high light condition.

Geometric adjustments (S6)

• Select service adjustment S6

• You can see the OSD as shown in below.

Digital pre-set (DP) adjustments (S9)

Sub brightness adjustment

Receive a good local channel.

• Enter the service mode and select service adjustment S9.

• You can see the OSD as shown in below.

• Select Sub brightness item, adjust Sub brightness data value to obtain normal brightness level.

• Press the DISPLAY button to memorize the data.

CONTRAST

• Fixed value = 8

TINT

• Fixed value = 170

COLOR

• Fixed value = 0

Factory outgoing mode (S12 : FACT)

• If you select the S12, then the set becomes factory outgoing status.

• You can see the OSD “outgoing OK.

Full schematic

TEA5101B Video output IC and the schematic

IC pin configuration

PWB top and bottom views