AV-21F1P
SERVICE ADJUSTMENTS
BEFORE STARTING SERVICE ADJUSTMENT
1. There are 2 ways for adjusting this TV: One is with the7. Preparation for adjustment (presetting):
REMOTE CONTROL UNIT and the other is the conventionalUnless otherwise specified in the adjustment items, preset the
method using adjustment parts and components.following functions with the remote control unit.
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 con-
dition can be different from the initial setting values.FunctionSetting value
3. Make sure that connection is correctly made to AC power source.VIDEO STATUSSTANDARD
4. Turn on the power of the TV and measuring instrument for warm-
TINT, COLOR, PICTURE, BRIGHT
ing up for at least 30 minutes before starting adjustment.CENTER
DETAIL
5. If the receive or input signal is not specified, use the most ap-
propriate signal for adjustment.
6. Never touch parts (such as variable resistors, transformers and
capacitors) not shown in the adjustment items of this service
adjustment.
MEASURING INSTRUMENT
ADJUSTMENT/CHECK ITEMS
AND FIXTURES
Adjustment/Check item Page
1. DC voltmeter (or Digital voltmeter)
B1 POWER SUPPLY Check16
2. Oscilloscope
3. Signal generator (Pattern generator)IF VCO Adjustment16
[PAL / SECAM / NTSC]
RF AGC Adjustment16
4. Remote control unit
5. TV audio multiplex signal generatorFOCUS Adjustment16
6. Frequency counter
DEFLECTION CIRCUIT Adjustment17
VIDEO/CHROMA CIRCUIT Adjustment18
VIDEO STATUS Adjustment21
X-RAY PROTECTION Check22
PURITY, CONVERGENCE Adjustment23
BASIC OPERATION IN SERVICE MENU
1. TOOL OF SERVICE MENU OPERATION
Operate the SERVICE MENU with the remote control unit.
2. SERVICE MENU ITEMS
With the SERVICE MENU, various settings (adjustments) can be made, and they are broadly classified in the following items of settings:
l PICTURE..................... For entering/adjusting the setting values (adjustment values) of the VIDEO/CHROMA and DEFLECTION cir-
cuits.
l VIDEO STATUS .......... For setting the values for CINEMA and GAME.
l OTHERS...................... For setting the values of other items.
l LOW LIGHT................. For setting the values of WHITE BALANCE circuit.
l HIGH LIGHT ................ For setting the values of WHITE BALANCE circuit .
l RF AFC CHK ............... For checking the RF (Do not adjust.)AFC circuit.
l VCO (CW) ................... For adjusting the IF circuit.
22
l IC BUS CTRL .............C BUS ON/OFF CONTROL. I(Fixed to ON.)
No. 5603310 |
ACEC
JVC
