No. 52025
AV-20N3
AV-20NMG3
AV-20NMG3B
15
SERVICE ADJUSTMENTS
BEFORE STARTING SERVICE ADJUSTMENT
1. There are 2 way 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 adjustment with the REMOTE CONTROL UNIT is made
on the basis of the initial setting values. The 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.
6. Never touch any adjustment parts, which are not specified
in the list for this adjustment VRs, transforms, condensers,
etc.
7. Preparation for adjustment
Unless otherwis e specified in the adjustment instructions, preset
the following functions with the REMOTE CONTROL UNIT.
User mode position
PICTURE MODE (VSM)
BRIGHT
VNR
OFF
TINT / COLOUR / BRIGHT
CONT. / SHARP
CENTER
BLUE BACK
OFF
OFF TIMER
OFF
AI ECO SENSOR
OFF
AUTO SHUT OFF
OFF
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
Ad justment item
B1 POWER SUPPLY
DEFLECTION c ircuit adjustment
FOCUS adjustment
VSM PRESET s etting
IF circ uit adjustment
PURITY/ CONVERGENCE adjus tment
V/C (Video / Chroma) circuit adjustment
