Table of Contents
Advertisement
E70-3 Service Manual
10. ADJUSTMENT
10-1. ADJUSTMENT CONDITIONS AND PRECAUTIONS
1. Approximately 30 minutes should be allowed for warm up before proceeding.
2. Adjustments should be undertaken only on those necessary elements since most of them have
been carefully preset at the factory.
10-2. MAIN ADJUSTMENTS
NO.
FUNCTION
DESIGNATION
1.
B+ 6.3V ADJ.
VR801
2.
Raster Centering ADJ.(56K)
$401
3.
Focus ADJ.
FOCUS VR. (On flyback transformer)
4.
Raster Light Output
SCREEN VR. (On flyback transformer)
5.
HV ADJ.
VR404
10-3. ALIGNMENT PROCEDURES
Adjustment Conditions and Precautions:
(1) Power supply voltage: AC 100~240V; 50/60 Hz.
(2) Warm up time:
The display must be power ON for at least 20 minutes before starting alignments. This is
especially critical in color temperature and white balance adjustments.
(3) Signals: reference the front detail specifications and timing table.
Video ; reference the front detail specifications.
1. Switching Regulator Unit:
Conditions: (a) Set timing 48KHZ 1024x768
(b) USE cross-hatch pattern, BRI./CONT. be set to max.
adjust VR801 to get 6.3 0.05V voltage at the cathode of D812.
2. Anode Voltage Unit:
Conditions: the same as ITEM 1.
adjust VR404 to get H.V 25.5+ 0.1KV for all tube.
3. RASTER CENTERING:
Conditions: the same as ITEM 1.
' Switch $401 till the raster in the spec.
4. Adjustment of White Balance
Conditions: (a) Warm up time must be over 30 minute.
(b) Set 48KHZ 1024x768 2" square & raster pattern.
(c) Degaussing one time.
(d) Adjust H-SIZE 3004 4mm, V-SIZE 225+ 4mm.
(A) Enter color alignment system.
-23-
1/17/2000
Advertisement
Table of Contents
