DELL W2607C LCD TV - HOW TO ENTER SERVICE MODE – ADJUSTMENTS – DISASSEMBLE – POWER SCHEMATIC
How to disassemble Dell W2607C LCD TV – SMPS Schematic –
Service Mode
Used ICs in SMPS: FAN5500AN _ NCP1377 _ STP10NK80ZFP(Power
Switching MOSFET) _ PC123FY2 4P (Photo-coupler) _ AD4411 _ SCR 2N5060 _ ST8120
_ STR-A6252
SERVICE MODE
* No
OSD pictures on screen, Press Number key 2 > 4 > 8 > 6 > MENU > INFO in Remote Control will
access into the factory mode. (Service Mode)
* Press MENU button to quit from factory mode.
In
the factory mode:
The
data is the result of R G B after W/B
adjustment:
5700K
R G B
6500K
R G B
9300K
R G B
NATURAL
R G B
NVRAM
Init > Initial EEPROM
Burn
in mode On/OFF
WHITE BALANCE ADJUSTMENT
Initial the EEPROM
> Press “NVRAM Init: Press “OK” to start” to initial EEPROM.
Bias (Low luminance) adjustment
Ensure the currently mode is PC (VGA)
Press “Auto Balance” button (the image is black and white at the PAT42)
> Press “NVRAM Init: Press “OK” to start” to initial EEPROM.
Bias (Low luminance) adjustment
Ensure the currently mode is PC (VGA)
Press “Auto Balance” button (the image is black and white at the PAT42)
GAIN ADJUSTMENT
> Switch
the chroma-7120 to RGB-mode (with press “MODE” button)
> Let the signal output the white image (press pattern 105), select one of the color temp (as Natural、 6500K、9300K、 5700K) and adjust factory mode window R G B until up to the value Chroma7120 R, G, B=100± 3.
> Select another color temp and follows as item 2.
> Let the signal output the white image (press pattern 105), select one of the color temp (as Natural、 6500K、9300K、 5700K) and adjust factory mode window R G B until up to the value Chroma7120 R, G, B=100± 3.
> Select another color temp and follows as item 2.
AV
W/B adjustment
Gain adjustment
> Switch the chroma-7120 to RGB-mode (with press “MODE” button)
> Let the signal output the white image (press pattern 105), select one of the color temp (as Natural、 6500K、9300K、 5700K) and adjust factory mode window R G B until up to the value Chroma7120 R, G, B=100± 3.
> Select another color temp and follows as item 2.
Gain adjustment
> Switch the chroma-7120 to RGB-mode (with press “MODE” button)
> Let the signal output the white image (press pattern 105), select one of the color temp (as Natural、 6500K、9300K、 5700K) and adjust factory mode window R G B until up to the value Chroma7120 R, G, B=100± 3.
> Select another color temp and follows as item 2.
SV(S-Video) W/B adjustment
the steps of SV’s W/B adjustment is the same as AV’s.
the steps of SV’s W/B adjustment is the same as AV’s.
(component)
W/B adjustment
the steps of CP’s W/B adjustment as same as PC’s.
the steps of CP’s W/B adjustment as same as PC’s.
Max Brightness measurement
* Switch to the full white pattern, in normal mode main menu
* Set “Picture Settings” menu Brightness, Contrast to the max.
The Minimum brightness is 400cd/m².
* Switch to the full white pattern, in normal mode main menu
* Set “Picture Settings” menu Brightness, Contrast to the max.
The Minimum brightness is 400cd/m².
DISASSEMBLE PROCEDURE
Remove Stand and base & Back cover
Lay LCD-TV on a flat, soft and clean surface.
> Remove 4 screws to remove stand and base.
Lay LCD-TV on a flat, soft and clean surface.
> Remove 4 screws to remove stand and base.
> Remove
4 screws at the top of the back cover. Fig.2
> Remove 2 screws at the left top of the back cover. Fig.3
> Remove 2 screws at the right top of the back cover. Fig.4
> Remove the connector wire of back cover and interface board
> Remove 2 screws at the left top of the back cover. Fig.3
> Remove 2 screws at the right top of the back cover. Fig.4
> Remove the connector wire of back cover and interface board
Remove the shield
* Remove
8 screws of the shield at the top and bottom shield. Fig. 6
* Remove 2 screws of the shield at the left. Fig. 7
* Remove 1 screw of the shield at the right.
* Remove 2 screws of the shield at the left. Fig. 7
* Remove 1 screw of the shield at the right.
SMPS (Power Supply Regulator) Circuit diagram
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