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AV-21L11
AV-21L31
AV-25L31
SERVICE ADJUSTMENTS
ADJUSTMENT PREPARATION:
1. You can make the necessary adjustments for this unit with either the remote control unit or with the adjustment equipment and parts
as given below.
2. Adjustment with the remote control unit is made on the basis of the initial setting values, however, the new setting values which set the
screen to its optimum condition may differ from the initial settings.
3. Make sure that AC power is turned on correctly.
4. Turn on the power for the set and test equipment before use, and start the adjustment procedures after waiting at least 30 minutes.
5. Unless otherwise specified, prepare the most suitable reception or input signal for adjustment.
6. Never touch any adjustment parts, which are not specified in the list for this adjustment-variable resistors, transformers, capacitors, etc.
7. Presetting before adjustment.
Unless otherwise specified in the adjustment instructions, preset the following functions with the remote control unit.
•
User mode setting position
Setting item
PICTURE MODE(VSM)
VNR
BASS,TREBLE,BALANCE
TINT,COLOR,BRIGHT,PICTURE,DETAIL
MEASURING INSTRUMENT
1. DC voltmeter (or Digital voltmeter)
2. Oscilloscope
3. Signal generator (Pattern generator) [NTSC]
4. Remote control unit
ADJUSTMENT ITEMS
•
B1 POWER SUPPLY
•
FOCUS adjustment
•
IF circuit adjustment
VCO (CW) adjustment
DELAY POINT adjustment
•
VC (VIDEO/CHROMA) circuit adjustment
WHITE BALANCE (Low light) adjustment
WHITE BALANCE (High light) adjustment
SUB BRIGHT adjustment
SUB PICTURE adjustment
SUB COLOR adjustment
SUB TINT adjustment
14
Setting value
BRIGHT
OFF
CENTER
CENTER
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No. 51904
DEFLECTION circuit adjustment
VER. SLOPE adjustment
VER. POSITION adjustment
V. ZOOM adjustment
HOR. POSITION adjustment
HOR. WIDTH adjustment
EW-PIN adjustment
EW-TRAPEZ adjustment
VER. SCURVE adjustment
UP CORNER and DW CORNER adjustment
HOR. PARALL adjustment
HOR. BOW adjustment
VSM PRESET adjustment
PRESET adjustment
AUDIO adjustment [AV-21L31-PH, AV-25L31-PH]
PURITY and CONVERGENCE adjustments
PURITY adjustment
STATIC CONVERGENCE adjustment
DYNAMIC CONVERGENCE adjustment
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