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
