Service Adjustments; Measuring Instrument And Fixtures; Adjustment Items - JVC AV-21F3 Service Manual

SERVICE ADJUSTMENTS

BEFORE STARTING SERVICE ADJUSTMENT
1. There ar e 2 way of adjusting this TV:
REMOTE CONTROL UNIT and the other is the conventional
method using adjustment parts and components.
2. The adjustment with the REMOTE CONTROL UNIT is made
on the basis of the initial setting values.
which adjust the screen to its optimum condition may differ
from the initial setting values.
3. Make s ure that connection is c orrectly made to AC power
sourc e.
4. Turn on the power of the set and equipment before us e, and
start the adjustment proc edures after waiting at least 30 minutes.
5. Unless otherwise spec ified, prepare the most suitable rec eption
or input signal for 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

Ad justment item
B1 POWER SUPPLY
FOCUS adjustment
IF circ uit adjustment
V/C (Video / Chroma) circuit adjustment
One is with the 6. Never touch any adjustment parts, which ar e not specified
7. Preparation for adjustment
The setting values
Ad justment item
DEFLECTION c ircuit adjustment
VSM PRESET s etting
PURITY/ CONVERGENCE adjus tment
No. 52024
in the list for this adjustment VRs, transfor ms, condenser s,
etc.
Unless otherwis e specified in the adjustment instructions, preset
the following functions with the REMOTE CONTROL UNIT.
User mode position
PICTURE MODE (VSM)
VNR
TINT / COLOUR / BRIGHT
CONT. / SHARP
BLUE BACK
OFF TIMER
AI ECO SENSOR
AUTO SHUT OFF
AV-21F3
AV-21FR3
AV-21FMG3B
BRIGHT
OFF
CENTER
OFF
OFF
OFF
OFF
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