Adjustments - Panasonic TC-14RM12L P Service Manual

TC-14RM12LP/TC-14RM12LP(.)/ TC-20RA12LP/TC-20RA12LP(.)/TC-20RM12LP/TC-20RM12LP(.)

ADJUSTMENTS

ITEM / PREPARATION
SUB-BRIGHT AND SUB-CONTRAST CALIBRATION
Supply a WINDOW pattern signal
1.
2. Adjust IMAGE MENU to DYNAMIC NORMAL
FOCUS CALIBRATION
• Assure that the SUB-BRIGHTNESS adjustment has been
done.
1. Supply a Philips or monoscope pattern signal.
2. Adjust IMAGE MENU to DYNAMIC NORMAL.
1 2 3
PURITY CALIBRATION
1. Adjust the HELMHOLTZ device for the local magnetic field
(HORIZONTAL: 0 ± 0.03 X 10-4T)
2. Let the set warm up (aging time) for a minimum of 60
minutes.
3. Supply a purity pattern (white pattern).
4. Adjust CONTRAST and BRIGHT to MAXIMUM.
5. The static convergence adjustment must have been
made preliminarily.
6. Connect a DC ampere meter between FBT pin11 (-) and
FBT pin3 (+), and adjust to 920µA±10%, varying the S-
BRT DAC control.
.
3 2 1
Fig. 1
PROCEDURE
SUB-BRIGHT CALIBRATION
1. Enter the Service Mode 1 and select S-BRT adjust
control.
2. Press "RECALL" until the OSD S-BRT is off.
3. Position the color analyzer in the LOW LIGHT image
area.
4. Ajust S-BRT control, so that it is Y=1,1±0,2 cd/m .
5. Press "RECALL" until the OSD S-BRT is on.
6. Press "OK" to memorize data
CALIBRATION:
1. Adjust the FOCUS variable resistor for the point of better
adjustment.
•
with PHILIPS signal .... take as reference for adjustment
the third vertical line (fig. 1).
•
with MONOSCOPE signal in the number 4 (fig.2).
CALIBRATION
:
1. Position the "ears" of the purity magnets both upward.
2. Adjust the purity until the markers in the purity jig
monitorscope becomes symmetrical in the horizontal
direction.
3. The vertical centralization correction is made through
the purity magnets for stripe CRT type only.
4. Slide the yoke forward by 10 mm±5 in the monitor. Then,
tighten the deflection yoke.
5. Repeat the procedures 2 ~ 3 ~ 4.
6. Press the belt of deflection yoke.
7. Adjust "beam landing" using a microscope. (for model
change or instrument check only)
A'
- 16 -
4
Fig. 2
A'
(A'-A') = < 2°