Troubleshooting - JVC LT-37DR1BJ Service Manual

4.5 ADJUSTMENT PROCEDURE
Measuring
Item
instrument
SOUND Remote control unit [9. Calibration Setting]
CALIBRATION
WHITE BALANCE Remote control unit
(HIGHLIGHT)
Signal generator
5.1 SELF CHECK FUNCTIONS
5.1.1 OUTLINE
This model has a "Self-diagnosis function," which checks the operation state of the circuits inside the set, and informs us of a failure.
Diagnosis is performed when the power is turned on, and information input to the main microcomputer is monitored at all time. The
diagnosis is displayed by LED flashing.
5.1.2 INDICATION OF SELF DIAGNOSIS BY USING LED
Flashing LEDs located on the front panel indicate the result of self-diagnosis.
Type of error
Low bias line short Repeating slow flashes 9 times and fast
protection flashes 9 times.
<Explanation of operation>
If an error is detected, the power is turned off.
Shortly after the power is turned off, the POWER LED will be blinked.
Power cannot be turned on until the power cord takes out and inserts, after the power is turned off.
Adjustment part
[1. Adjust]
S001: R DRIVE (Red drive)
S002: G DRIVE (Green drive)
S003: B DRIVE (Blue drive)
SECTION 5

TROUBLESHOOTING

POWER LED flash cycle
Description
(1) Receive any bilingual broadcast.
(2) Select "9. Calibration Setting" from the SERVICE
MODE.
(3) Press the "OK" key to start the calibration.
(4) After "Finish" is displayed, press the [MENU] key to
exit the menu.
(1) Receive a PAL 75% all white signal.
(2) Set PICTURE MODE to "STANDARD".
(3) Set ZOOM to "FULL".
(4) Set COLOUR TEMP. to "NORMAL".
(5) Select "1. Adjust" from the SERVICE MODE.
(6) Adjust to Keep one of <S001> (Red drive),
<S002> (Green drive) or <S003> (Blue drive)
unchanged, then lower the other two so that the all-
white screen is equally white throughout.
NOTE:
Set one or more of <S001>, <S002>, and <S003>
to "000".
(7) Check that white balance is properly tracked from low
light to high light. If the white balance tracking is
deviated, adjust to correct it.
(8) Press the [MUTING] key to memorize the set value.
(No.YA688<Rev.001>)1-19