Service Adjustments - JVC AV28L2EUGR Service Manual

AV28L2EUGR
AV28L2EUBL
AV28L2EUGY

SERVICE ADJUSTMENTS

BEFORE STARTING SERVICE ADJUSTMENT
1. There are 2 ways of adjusting this TV: One is with the
REMOTE CONTROL UNIT and the other is the conventional
method using adjustment parts and components.
2. The setting (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 to AC power
source.
4. Turn on the power of the TV and measuring instrument for
warming up for at least 30 minutes before starting adjustment.
5. If the receive or input signal is not specified, use the most
appropriate signal for adjustment.
6. Never touch parts (such as variable resistors, transformers and
condensers) not shown in the adjustment items of this service
adjustment.
MEASURING INSTRUMENT AND FIXTURES
1. DC voltmeter (or digital voltmeter)
2. Oscilloscope
3. Signal generator (Pattern generator) [PAL / SECAM / NTSC]
4. Remote control unit
ADJUSTMENT ITEMS
Checking items.
●
Adjustment of FOCUS.
●
VSM preset setting.
●
VIDEO / CHROMA circuit adjustment.
●
DEFLECTION circuit adjustment.
●
AUDIO circuit adjustment. (Do not adjust)
●
12
7. Preparation for adjustment (presetting):
Unless otherwise specified in the adjustment items, preset the
following functions with the REMOTE CONTROL UNIT:
" Setting position
PICTURE MODE (VSM)
SLEEP TIMER
BALANCE
ECO
ZOOM
No. 51778
NORMAL
OFF
CENTER
OFF
PANORAMIC