Tuesday, April 07, 2015

JVC LT-42P789/C SERVICE MODE AND POWER SUPPLY CIRCUIT

JVC  LT-42P789/C 

LCD TV

SERVICE MODE AND POWER SUPPLY CIRCUIT 

ADJUSTMENT PREPARATION
(1) This TV is adjusted by using REMOTE CONTROL UNIT.
(2) The adjustment using the REMOTE CONTROL UNIT is made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values.
(3) Make sure that connection is correctly made AC to AC power source.
(4) Turn on the power of the TV and measuring instruments for warming up for at least 30 minutes before starting adjustments.
(5) If the receive or input signal is not specified, use the most appropriate signal for adjustment.
(6) Never touch the parts (such as variable resistors, transformers and condensers) not shown in the adjustment items of this service adjustment.
RESET SETTING BEFORE ADJUSTMENTS
Unless otherwise specified in the adjustment items, preset the following functions with the REMOTE CONTROL UNIT
MEASURING INSTRUMENT AND FIXTURES
# Signal generator (Pattern generator) [NTSC]
# Remote control unit
SERVICE MODE
HOW TO ENTER THE SERVICE MODE
(1) Set to "OFF" using the [SLEEP] key.
(2) While "OFF" is displayed, press the [V. STATUS] key and [DISPLAY] key simultaneously.
(3) Enter the SERVICE MODE.
(4) Select the 2.White balance base from the SERVICE MODE.

HOW TO EXIT THE SERVICE MODE
Press the [MENU] key to exit the SERVICE MODE


INITIAL SETTING VALUES IN THE SERVICE MODE
# Perform fine-tuning based on the "initial values" using the remote control unit when in the SERVICE MODE.
# The "initial values" serve only as an indication rough standard and therefore the values with which optimal display can be achieved may be different from the default values.
POWER SUPPLY CIRCUIT 
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