Over-Current Protect Circuit Adj; Centering Adjustment - Panasonic PT-M1083U Service Manual

PT~M1 085U1PT~M1 083U
I
C. OVER-CURRENT PROTECT CIRCUIT ADJ.
1. EQUIPMENT TO BE USED
Digital Voltmeter
Programmable
Video Generator
2. INITIAL CONDITION (on screen
value)
CONTRAST MAXIMUM
BRIGHT
"
MAXIMUM
3. ADJUSTMENT PROCEDURE
1. Input a full white
pattern
signal (fH=31.5kHz, fV=60Hz)
to LINE
IN.
2. Connect a digital voltmeter between TPE1 (+) and
TPE2
(-}.
3. Confirm
that the value of voltage is 2.1 V ::I::
O.2V.
4. Connect a digital voltmeter between TPE6 (+) and
TPE5 (-).
5. Adjust R6042 (PROTECT 3) on the E-P.C.Board so
that the
value
of voltage is 1.5V :t 0.1 V.
6. Cover R6042 (PROTECT 3) with sleeve, and secure it
in place with silicon bond.
CENTERING ADJUSTMENT
(V.P.C:Board)
EQUIPMENT TO BE USED
Programmable Signal Generator
Remote Control
1.
Note:
For remote control operation. see REMOTE
CONTROL OPERATION PROCEDURE to be
described later.
2. INITIAL CONDITION (on screen
value)
BRIGHT 128
CONTRAST 190
CENTERING
128
CONVERHGENCE 128
~
ADJUSTMENT PROCEDURE
1. Input a circular pattern
signal (fH=31.5KHz, fV =60Hz)
in AGB IN
1.
2. Press the TEST button
on the remote control so that
the corsshair
pattern
is displayed on the screen.
3. Adjust angles of deflection coils of R, G and B 50 that
the horizontal line in the center of picture may run
parallel with the horizontal line of the screen display
surface.
4. Make sure that deviations between crosshair pattern
horizontal
axes
of R, G and B and horizontal directions
on the screen display surface are not beyond the
numerical values described in Table 4.
3.
(mm)
R :!: 184
G :!: 73
8 :!: 184
Table 4
5. Make sure that deviations between crosshalr pattern
vertical axes of R. G and B and vertical directions on
the screen dlspaly surface do not exceed:!: 100mm.
6. Adjust the CENTERING on the remote controller so
that green horizontal line may lie nearly halfway
between red and blue horizontal lines.
(DAC value: 50
-
200)
7.
Put the lens caps on the red and blue lenses.
8. Adjust R4083 (V. BIAS) so that the center of green
cross-hair pattern may be placed 25 mm below the
vertical center of screen display surface. (Adjust
R4083.)
9. Adjust the CENTERING button on the remote
controller so that green crosshair pattern may be
placed in the center
of horizontal
direction of screen
display surface.
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