JVC LT-22HG45E
SERVICE MODE TROUBLESHOOTING POWER SUPPLY AND BACK LIGHT LED DRIVER CIRCUIT
SERVICE MODE
This unit is
provided with the following SERVICE MODES so you can repair, examine and adjust
easily.
Check of the SUM DATA and MICON
VERSION on the screen.
Press the MENU > 1 > 1 > 4 > 7 button on the remote control to select "Setup".
Press the DOWN button on the remote control to select "Version Info".
Press the MENU > 1 > 1 > 4 > 7 button on the remote control to select "Setup".
Press the DOWN button on the remote control to select "Version Info".
ADJUSTMENT
PROCEDURE
Prepare the following measurement tools for
electrical adjustments.
1. Pattern Generator
On-Screen Display Adjustment
1. Press the MENU > 1 > 1 > 4 > 7 button on the remote control.
2. Press the DOWN button on the remote control.
3. Select the "Video" menu, then press ENTER button on the remote control.
4. Select the "Color Temperature" menu , then press ENTER button on the remote control.
WHITE BALANCE ADJUSTMENT
1. Place the set in Aging Test for more than 15 minutes.
2. Please select input About mode to adjust W/B.
3. Receive the gray scale pattern from the Pattern Generator.
4. Press the INPUT SELECT button on the remote control to set to the AV mode.
5. Using the remote control, set the brightness and contrast to normal position.
6. Press the MENU > 1 > 1 > 4 > 7 button on the remote control.
7. Press the DOWN button on the remote control.
8. Select the "Video" menu, then press ENTER button on the remote control.
9. Select the "Color Temperature" menu , then press ENTER button on the remote control.
10. Press the UP/DOWN button on the remote control to select the "R Gain", "G Gain", "B Gain", "R Offset", "G Offset", "B Offset.
11. Adjust the LEFT/RIGHT button on the remote control to whiten the R Gain, G Gain, B Gain, R Offset, G Offset, B Offset at each step tone sections equally..
12. Perform the above adjustments 10 and 11 until the white color is achieved.
1. Pattern Generator
On-Screen Display Adjustment
1. Press the MENU > 1 > 1 > 4 > 7 button on the remote control.
2. Press the DOWN button on the remote control.
3. Select the "Video" menu, then press ENTER button on the remote control.
4. Select the "Color Temperature" menu , then press ENTER button on the remote control.
WHITE BALANCE ADJUSTMENT
1. Place the set in Aging Test for more than 15 minutes.
2. Please select input About mode to adjust W/B.
3. Receive the gray scale pattern from the Pattern Generator.
4. Press the INPUT SELECT button on the remote control to set to the AV mode.
5. Using the remote control, set the brightness and contrast to normal position.
6. Press the MENU > 1 > 1 > 4 > 7 button on the remote control.
7. Press the DOWN button on the remote control.
8. Select the "Video" menu, then press ENTER button on the remote control.
9. Select the "Color Temperature" menu , then press ENTER button on the remote control.
10. Press the UP/DOWN button on the remote control to select the "R Gain", "G Gain", "B Gain", "R Offset", "G Offset", "B Offset.
11. Adjust the LEFT/RIGHT button on the remote control to whiten the R Gain, G Gain, B Gain, R Offset, G Offset, B Offset at each step tone sections equally..
12. Perform the above adjustments 10 and 11 until the white color is achieved.
TROUBLESHOOTING
POWER DOES NOT
TURN ON
Is F501 broken?
> Change F501.
Is there voltage
C502 305VDC? > Check D507, D508, D518, D510 and peripheral circuit.
Is there voltage
at pin6 of IC501 21VDC? > Check IC501 and peripheral circuit.
Is there voltage
Q501 169VDC? > Change R510 and peripheral circuit.
Is there voltage
at pin 8 of IC501 169VDC? > Check D505 and peripheral circuit.
Is there voltage
at pin1 of IC501 5.7VDC? > Check R516, R534 and peripheral circuit.
THE PICTURE APPEARS, BUT THERE IS
NO AUDIO
Is SP WIRE
CONNECTOR connected? > Connect SP WIRE CONNECTOR.
Is there signal
at wave (SP.Lift) and wave (SP.Right)? > Change SPEAKER.
Is there signal
at pins 1 and 9 of IC YD1517(F)? > Check IC YD1517(F) and peripheral circuit.
Is there signal
at pins 1 and 9 of IC YD1517(F)? > Check IC YD1517(F) and peripheral circuit.
Is there voltage
at pin 7 of IC YD1517(F) +12VDC? > Check D514 and peripheral circuit.
THE PICTURE DOES NOT APPEAR
Does backlight
shine? > Check IC7001 and peripheral circuit.
Is there voltage
at pin2 12VDC? > Check D514 and L503 and peripheral circuit.
Is there voltage
at pin7 of IC 7001 5VDC? > Check R7003 and peripheral circuit.
Change IC 7001.
THE COLOR DOES NOT APPEAR
Is Setting of
color Normal? > Adjust the color.
Is the color
signal received? > Receive the color signal.
Is there color
signal at IC MT5310CHHU? > Check IC MT5310CHHU and peripheral circuit.
Change IC
MT5310CHHU.
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