PANASONIC PT-LC50U - PT-LC50E - PT-LC150
LCD PROJECTOR
SERVICE MODE LAMP RESET AND ADJUSTMENT
How to
initialize EEPROM IC
If EEPROM IC (IC2006) on Main C.B.A. are replaced: After
replacing EEPROM IC (IC2006), be sure to perform each of following steps in the
order presented.
1. Connect a jumper wire between TP2017 and TP2018 on Main
C.B.A. for over 5 seconds to set to factory set mode. Then, remove the jumper
wire.
2. “FACTORY” appears on screen.
3. Connect a jumper wire between TP2017 and TP2018 again for
over 5 seconds to initialize EEPROM IC. Then, remove the jumper wire.
4. “SELF CHECK” appears on screen.
5. Remove jumper wires and “MEMORY OK” appears on screen.
6. After completing all adjustments, press the MENU button
to memorize adjustment data in EEPROM IC and release from the Factory Adjust
mode. Otherwise, adjustment data will be cancelled.
Lamp
replacement procedure
Caution: Because of possibility of injury, strictly follow
the replacement procedure below.
1. After the cooling
fan has stopped, and STANDBY(R) ON(G) indicator turns solid red, unplug the
power cord.
Note: Wait more than one hour for lamp replacement.
The LCD Projector has a forced cooling feature. After the
POWER switch is turned OFF, and sometime during about the first minute of the
normal cooling fan operation, press MENU for 5 seconds. The cooling fan will
change to high speed forabout 10 minutes.
2. Loosen 2 screws (A) using a screwdriver as shown.
3.Remove the Lamp Cover Unit.
4. Push the of the Lamp Hold Lever to release the Lamp
5. Carefully pull the Lamp Unit.
RESETTING THE LAMP HOUR TIMER
Press POWER and INPUT buttons together for about 5 seconds
when lighting up red by POWER LED to reset lamp time.
Removal of the Filter Cover
1. Hold the indent on the Filter Cover and pull the Filter
Cover with the Filter as shown
FACTORY
ADJUST
All Electrical Adjustments are performed on the “FACTORY
ADJUST” mode which is used remote control unit instead of variable resistor to
control the adjustment value.
1. Connect a jumper wire between TP2017 and TP2018 on Main
C.B.A. for over 5 seconds to enter the “FACTORY ADJUST” mode.
2. Press the POWER button once.
3. While "Please press POWER button again to power
off." is displayed, press the MENU button.
4. Press UP or DOWN button on remote control to select and press
the ENTER button to
Do not adjust all items in “DIGITAL ADJUST”, and VIDEO
BRIGHT in “VIDEO/RGB ADJUST, and GAMMA R, G, B in “LCD/FAN ADJUST”.
LCD
VOLTAGE ADJUSTMENT
Purpose: To set the standard voltage for LCD panel.
Symptom of Misadjustment: LCD panel may be damaged.
1. Connect the DVM (Digital Volt Meter) to TP1904.
2. Press or button on the remote control to select “15.3V”.
3. Press LRFT or RIGHT button so that the voltage shown in the
display of DVM is 15.3 V ± 0.05 V DC.
RGB
INPUT LEVEL ADJUSTMENT
Purpose: To set the optimum signal level.
Symptom of Misadjustment: The picture will be too light or
too dark.
1. Supply Gray Scale Pattern Signal (3 scales).
2. Connect the oscilloscope to TP3501.
3. Press UP or DOWN button on remote control to select “R
BRIGHT”.
4. Press LEFT or RIGHT button so that Black level becomes
the same as OSD Black leve
5. Select “R LEVEL”, and press LEFT or RIGHT button so that White level becomes the same as
OSD White level.
6. Connect the oscilloscope to TP3502.
7. Press UP or DOWN button on remote control to select “G
BRIGHT”
8. Press LEFT or RIGHT button so that Black level becomes
the same as OSD Black level.
9. Select “G LEVEL”, and press LEFT or RIGHT button so that
White level becomes the same as OSD White level.
10. Connect the oscilloscope to TP3503.
11. Press UP or DOWN button on remote control to select “B
BRIGHT”.
12. Press LEFT or RIGHT button so that Black level becomes
the same as OSD Black level.
13. Select “B LEVEL”, and press LEFT or RIGHT button so that
White level becomes the same as OSD White level.
VIDEO
INPUT ADJUSTMENT
Purpose: To set the optimum signal level.
Symptom of Misadjustment: The picture will be too light or
too dark.
1. Supply Gray Scale Pattern Signal (3 scales).
2. Connect the oscilloscope to TP3502.
3. Press UP or DOWN or MENU button on remote control to
select “VIDEO LEVEL”.
4. Press LEFT or RIGHT button so that the white level
becomes the same as OSD white level.
COMPONENT
VIDEO COLOR ADJUSTMENT
Purpose: To set the optimum signal level.
Symptom of Misadjustment: The picture will be too light or
too dark
1. Supply Component Video 480P Blue 100 % Raster Signal.
2. Connect the oscilloscope to TP3503.
3. Press UP or DOWN button on remote control to select
“YPBPR COLOR”.
4. Press LEFT or RIGHT button so that the Blue level becomes
the same as OSD White level.
After completing adjustments, press the “MENU ” button to
release from “VIDEO/RGB ADJUST” mode. (Adjustment data is memorized in EEPROM
IC (IC2006) by pressing “MENU ” button.)Otherwise, adjustment data will be cancelled.
LCD
COMMON ADJUSTMENT
Purpose: To set the optimum LCD common voltage.
Symptom of Misadjustment: The picture will be bluish or
reddish.
Note: This adjustment should be done in a darkroom.
1. Supply 70 % Red Horizontal Signal and project on the
screen.
2. Press UP or DOWN button on remote control to select “VCOM
R”.
3. Press LEFT or RIGHT button so that the flicker on the
whole screen becomes minimal.
4. Supply 70 % Green Horizontal Signal and project on the
screen.
5. Press UP or DOWN button on remote control to select “VCOM
G”.
6. Press LEFT or RIGHT button so that the flicker on the
whole screen becomes minimal.
7. Supply 70 % Blue Horizontal Signal and project on the
screen.
8. Press UP or DOWN button remote control to select “VCOM
B”.
9. Press LEFT or RIGHT button so that the flicker on the
whole screen becomes minimal.
WHITE
LEVEL ADJUSTMENT
Purpose: To set the optimum signal level.
Symptom of Misadjustment: The picture will be too light or
too dark.
1. Supply Gray Scale Pattern Signal (3 scales).
2. Connect the oscilloscope to TP3505.
3. Press UP or DOWN button on remote control to select
“WHITE LEVEL”.
4. Press LEFT or RIGHT button so that level A becomes 3.7 V
± 0.05 V [p-p].
BLACK
LEVEL ADJUSTMENT
Purpose: To set the optimum signal level.
Symptom of Misadjustment: The picture will be too light or
too dark.
This adjustment should be done in a darkroom.
1. Supply Green Level Adjustment Signal and project on the
screen.
2. Press UP or DOWN button on remote control to select
“BLACK LEVEL”.
3. Press LEFT or RIGHT button so that Portion (B) are
invisible and Portion (A) are visible on the screen.
WHITE
BALANCE ADJUSTMENT
Purpose: To set the standard white level for each color
temperature.
Symptom of Misadjustment: White will become bluish or
reddish.
This adjustment should be done in a darkroom.
1. Supply Gray Scale Pattern Signal (10 scales) and Project
on the screen.
2. Press UP or DOWN button on remote control to select
“CUTOFF R” or “CUTOFF B”.
3. Press LEFT or RIGHT button to adjust “CUTOFF R” or
“CUTOFF B” so that the area around 4rdand 6th scale (A) becomes pure gray with
no red or blue tint.
