SYLVANIA 6620LE 20” COLOR LCD TELEVISION – Service mode_Power & Back-light
Inverter Circuit Diagram _ Initial Data Values _ Software Reset
How to make Service remote control unit
Prepare normal remote control unit. (Part No. N0105UD or N0127UD) Remove 3 Screws from the back lid.
Prepare normal remote control unit. (Part No. N0105UD or N0127UD) Remove 3 Screws from the back lid.
Add J1 (Jumper Wire) to the remote
control CBA
How to set up the 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.
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.
INITIAL DATA VALUES
SMPS & BACK-LIGHT INVERTER SCHEMATIC
Fixed voltage ( or Auto voltage selectable ) power supply circuit
is used in this unit. If Main Fuse
(F601) is blown, check to see that all components in the power supply circuit
are not defective before you connect the AC plug to the AC power supply. Otherwise it may cause some components in the
power supply circuit to fail.
Flicker
Adjustment
Adjustment Point: VR201 (LCD Main CBA Unit)
Adjustment Point: VR201 (LCD Main CBA Unit)
Use
service remote control unit
1. Enter the Service mode.
1. Enter the Service mode.
2. Press [2] button on the
remote control unit. The following screen appears.
3. If Flicker Adjustment is not fit, the screen become the following.
4. Adjust VR201 so that flash stops.
3. If Flicker Adjustment is not fit, the screen become the following.
4. Adjust VR201 so that flash stops.
The
following adjustment normally is not attempted in the field. Only when
replacing the LCD Panel then adjust as a preparation.
Purpose: To mix red, green and blue beams correctly for pure white.
Symptom of Maladjustment: White becomes bluish or reddish.
Symptom of Maladjustment: 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%).
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.
Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
4. Enter the Service mode. Press [VOL Dn] button on the service remote control unit and select “C/D” mode.
5-1.When “x” value and “y” value are not within specification, adjust “DB(C/D1)” or “DR(C/D1)”.
Note: “DB(C/D1)” or “DR(C/D1)” must be adjusted within ±10.
5-2.When “x” value and “y” value are not within specification, adjust “DB(C/D2)” or “DR(C/D2)”.
Note: “DB(C/D2)” or “DR(C/D2)” must be adjusted within ±10
1. Operate the unit for more than 20 minutes.
2. Input the White Purity (APL 80%).
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.
Note: The optical receptor must be set perpendicularly to the LCD Panel surface.
4. Enter the Service mode. Press [VOL Dn] button on the service remote control unit and select “C/D” mode.
5-1.When “x” value and “y” value are not within specification, adjust “DB(C/D1)” or “DR(C/D1)”.
Note: “DB(C/D1)” or “DR(C/D1)” must be adjusted within ±10.
5-2.When “x” value and “y” value are not within specification, adjust “DB(C/D2)” or “DR(C/D2)”.
Note: “DB(C/D2)” or “DR(C/D2)” must be adjusted within ±10
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 [POWER], [2], [7], [1], and [MUTE] buttons on the remote control unit in that order within 5 seconds.
- 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.
2. To enter the service mode, press [POWER], [2], [7], [1], and [MUTE] buttons on the remote control unit in that order within 5 seconds.
- 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.
Software
Reset
To reset software, press [5] button on the remote control unit for at least 5 seconds after pressing [CH RETURN] button on the remote control unit.
To reset software, press [5] button on the remote control unit for at least 5 seconds after pressing [CH RETURN] button on the remote control unit.
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: 0004FP-0.47)
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: 0004FP-0.47)
CLICK ON THE PICTURES TO MAGNIFY
