Monday, February 02, 2015

EMERSON EWL20S5 SEREVCIE MODE AND POWER SUPPLY CIRCUIT

SEREVCIE MODE AND POWER SUPPLY CIRCUIT

Category : Lcd Television Repair  

SERVICE MODE

1. Use the service remote control unit.
2. Turn the power on. (Use main power on the TV unit.)
3. Press [SLEEP] button on the service remote control unit. Version of micro computer will be displayed on the LCD or display. (Ex: 0008GP- 0.08)

Initial Setting

General: Enter the Service mode

Set the each initial data as shown on table  below

Initial Data
Item
Button
(on the service
remote control)
Data
Value
BRT



[MENU]à[1]
128
CNT
124
CLR-R
64
CLR-B
64
TNT
128
V-TNT
128
SHR
112
S-BRT


[MENU]à [2]
128
S-CNT
128
S-CLR-R
64
S-CLR-B
64
S-TNT
128
S-SHR
112
C-BRT


[MENU]à[3]
128
C-CNT
128
C-CLR-R
64
C-CLR-B
64
C-TNT
128
C-SHR
112
D2-BRT


[MENU]à[5]
133
D2-CNT
140
D2-CLR-R
74
D2-CLR-B
74
D2-TNT
128
D2-SHR
112
D3-BRT


[MENU]à[6]
126
D3-CNT
138
D3-CLR-R
64
D3-CLR-B
64
D3-TNT
128
D3-SHR
112
DR(C/D1)
[VOL V ]à [4]
176
C-DR(C/D2)
157
DB(C/D1)
[VOL V ]à[6]
175
C-DB(C/D2)
152
Flicker Adjustment

1. Enter the Service mode.
2. Press [2] button on the remote  control unit.
3. If Flicker Adjustment is not fit,.
4. Press [CH UP/ DOWN] buttons on the remote control unit so that flash stops.

White Balance Adjustment

Purpose: To mix red, green and blue beams correctly for pure white.
Symptom of Misadjustment: White becomes bluish or reddish
Note: Use service remote control unit
1. Operate the unit for more than 20 minutes.
2. Input the White Purity (APL 80% or APL 20%).
3. Set the color analyzer to the CHROMA mode and bring the optical receptor to the center on the LCD-Panel surface after zero point calibration as shown above.
Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
4. [RF/VIDEO1]
Enter the Service mode. Press “VOL DOWN” button on the remote control unit and select “C/D-1” mode.
[VIDEO2]
Enter the Service mode. Press “VOL DOWM” button on the remote control unit and select “C/D-2” mode.
5. [RF/VIDEO1]
When “x” value and “y” value are not within specification, adjust “DB (C/D1)” or “DR (C/D1)”. Refer to “1. Initial Setting.”
Note: “DB(C/D1)” or “DR(C/D1)” must be adjusted within ±0.01.
[VIDEO2]
When “x” value and “y” value are not within specification, adjust “DB(C/D2)” or “DR(C/D2)”. Refer to “1. Initial Setting.”
Note: “DB(C/D2)” or “DR(C/D2)” must be adjusted within ±0.01.
6. Turn the power off and on again. (Main power button on the TV unit.)

How to initialize the LCD television:

1. Turn the power on. (Use main power on the TV unit.)
2. To enter the service mode, press [SLEEP] button on the service remote control unit.
- To cancel the service mode, press [POWER] button on the remote control.
3. To initialize the LCD television, press [DISPLAY] button on the remote control unit.
4. Confirm "FF" indication on the upper right of the screen.

POWER SUPPLY CIRCUIT 
Power supply board 
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INVERTER CIRCUIT 
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