Advertisement
AV-20420
AV-20421
3.1 ADJUSTMENT PREPARATION
(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 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 AC to AC power source.
(4) Turn on the power of the TV and measuring instruments for warning up for at least 30 minutes before starting adjustments.
(5) If the receive or input signal is not specified, use the most appropriate signal for adjustment.
(6) Never touch the parts (such as variable resistors, transformers and condensers) not shown in the adjustment items of this service
adjustment.
(7) Preparation for adjustment. Unless otherwise specified in the adjustment items, preset the following functions with the REMOTE
CONTROL UNIT.
VIDEO STATUS
BASS/TREBLE/BALANCE
TINT / COLOUR / PICTURE / BRIGHT / DETAIL
MTS
3.2 MEASURING INSTRUMENT AND FIXTURES
• DC voltmeter (or digital voltmeter)
• Oscilloscope
• Frequency counter
• Signal generator (Pattern generator : NTSC)
• TV audio multiplex signal generator
• Remote control unit
1-12 (No.52111)
ADJUSTMENT
Setting item
SECTION 3
Setting value
STANDARD
Center
Center
STEREO
3.3 ADJUSTMENT ITEMS
• B1 POWER SUPPLY VOLTAGE CHECK
• TUNER CIRCUIT / FOCUS
- IF VCO ADJUSTMENT
- RF AGC ADJUSTMENT
- FOCUS ADJUSTMENT
• DEFLECTION CIRCUIT
- V SIZE ADJUSTMENT
- H POSITION ADJUSTMENT
• WHITE BALANCE
- LOW LIGHT ADJUSTMENT
- HIGH LIGHT ADJUSTMENT
• VIDEO CIRCUIT
- SUB BRIGHT ADJUSTMENT
- SUB CONTRAST ADJUSTMENT
- SUB COLOR ADJUSTMENT
- SUB TINT ADJUSTMENT
• MTS CIRCUIT
- INPUT LEVEL ADJUSTMENT
- STEREO VCO ADJUSTMENT
- SAP VCO ADJUSTMENT
- FILTER CHECK
- SEPARATION ADJUSTMENT
• PURITY / CONVERGENCE
- PURITY ADJUSTMENT
- STATIC CONVERGENCE ADJUSTMENT
- DYNAMIC CONVERGENCE ADJUSTMENT
• HIGH VOLTAGE HOLD DOWN CIRCUIT CHECK
Advertisement
