Panasonic PT-52LCX66-K Service Manual page 94

PT-52LCX66-K / PT-56LCX16-K / PT-61LCX66-K
MECHANICAL (PROJECTION UNIT)
ADJUSTMENT SECTION
FULL MIRROR ADJUSTMENT
Purpose:
To set the Full Mirror in the proper position.
Symptom of Misadjustment:
The non-uniformity color will appear.
TP
Dichroic Mirror Green
Full Mirror Red
Full Mirror Blue
EQUIPMENT
NTSC Video Pattern
Generator,
Screwdriver (+) (-)
Note:
This adjustment should be done in a darkroom.
SET UP 1:
1. Place the unit into Service Position (2).
2. Set to a desired mode except TV mode by pressing TV/
VIDEO key on the remote.
3. Turn off the unit power and unplug the AC Cord.
4. Disconnect the LCD Flat Panel connectors to be no
signal input. Then, plug in the AC Cord and turn on the
power.
CAUTION:
When disconnecting/reconnecting the LCD Flat Panel
connectors, be sure to unplug the AC Cord.
5. Perform Full Mirror (Green, Red, and Blue) Adjustment
as follows in order.
OR
SET UP 2:
1. Place the unit into Service Position (2).
2. Connect the NTSC Video Pattern Generator to the
VIDEO Input 1 Terminal.
3. Supply 100 % White Signal and set to VIDEO 1 mode
by pressing TV/VIDEO key on the remote.
4. Perform Full Mirror (Green, Red, and Blue) Adjustment
as follows in order.
OR
SET UP 3:
1. Place the unit into Service Position (2).
2. With power on, press and hold the VOLUME DOWN button
and the RECALL key on the remote for more than 5
seconds. "WORK MODE" will appear on the screen.
3. Press the DVD key to go to DVD mode, then the RECALL
key on the remote for more than 1 second.
"100% White" will appear from internal pattern.
(The Iris Mechanism opens fully.)
4. Perform Full Mirror (Green, Red, and Blue) Adjustment
as follows in order.
ADJ. INPUT
No signal input (White
Screen is displayed.)
(SET UP 1)
or
(VIDEO Input 1 Terminal
or Internal Pattern)
White Signal (100%)
(SET UP 2 or SET UP 3)
SPECIFICATION
Refer to Description below
DICHROIC MIRROR GREEN ADJUSTMENT
1. Loosen 2 Screws (A) of the Mirror Holder of the Dichroic
Mirror Green as they can be moved slightly.
2. Insert a Screwdriver (-) into Portion (a) and/or (a') and
turn it to move the Mirror Holder of the Dichroic Mirror
Green as indicated by the arrow. Stop moving at the
point where there is no shadow around the screen.
If there is shadow somewhere on the screen, repeat the
above process.
Then, tighten 2 Screws (A) securely (0.2-0.3 N
Screws (A)
No shadow (out of color)
at all sides of the screen
Note for Mirror Holders:
After adjusting the Mirror Holders, confirm the Full Mirror
Red, Blue, and the Dichroic Mirror Green in correct position
as shown.
Full Mirror Red, Blue,
or Dichroic Mirror Green
94
·
m).
Portion (a')
Dichroic Mirror Green
Mirror Holder
Portion (a)
Fig. E3-1
<Screen>
Fig. E3-1a
Mirror Holder