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LIGHT SOURCE

(LAMP)

Mirror R,G,B

Condencing lens

B reflector

UV reflector

Mirror B

G reflector

Fly-eye lens(Input)

Fly-eye lens(Output)

Relay lens 1

Mirror R 1

Relay lens 2

R dichroic filter

Mirror R 2

Relay lens 3

Input polarizer R

LCD(R)

LCD(B)

LCD(G)

Output pre-polarizer G

Input polarizer B

Input polarizer G

Condencing lens B

Projection lens

Blue

Green/Red

Red

PBS

Green

Output pre-polarizer B

Cross dichroic prizm

Condencing lens G

1. Remove the two lock screws, and take the prism holder unit and the projection lens assembly out of the optical

unit.

2. Remove the four lock screws, separate the prism holder unit and the projection lens assembly from each other.
3. Replace the prism holder unit with new one. Take the above steps 1 and 2 in reverse order.

Note: Even if just one of the LCD panels is defective, it is necessary to replace the entire prism holder unit. Do not

replace just the defective LCD panel only.

1

Prism holder unit lock screws

2

Projection lens lock screws

Projection lens assembly

Prism holder unit

R-LCD panel

B-LCD panel

G-LCD panel

Optical unit

1. Turn on the power (with the

lamp on) and warm up the
set for 15 minutes.

»

Make the following settings.
Press S2002 to call the process mode and execute
"SS2" on SS menu.

1. Select the following group

and subjects.
Group : AD
Subject : R-Bright

G-Bright
B-Bright

(Process GAMMA interlock)
2. Feed the XGA 16-step sig-

nal with an amplitude level
of 50% (0.35 Vp-p).

1.Watching the screen, adjust the R-, G- and B-Bright

settings so that the second tone (3% level step) on
the black side should have some pixel dropouts and
the bright color zone should become just about a half.

1. Select the following group

and subjects.
Group : AD
Subject : R-Contrast

G-Contrast
B-Contrast

(Process GAMMA interlock)
2. Feed the SVGA white sig-

nal with an amplitude level
of 96% (0.67 Vp-p).

1.Watching the screen, adjust the R-, G- and B-Con-

trast settings so that because of some pixel drop-
outs, the bright color zone should become just about
a half.

1. Feed a 480P component

10-step signal with 100%
amplitude.

2. Select the following group

and subjects.
Group : DTV
Subject : Bright

Contrast

(Process GAMMA interlock)

1. Check the setting value.

Contrast (White Level): 2
Bright (Black Level):

12

1. Feed a 480PI component

10-step signal with 100%
amplitude.

2. Select the following group

and subjects.
Group : DVD
Subject : Bright

Contrast

(Process GAMMA interlock)

1. Check the setting value.

Contrast (White Level): 1
Bright (Black Level):

13

1. Feed an NTSC composite

video 10-step signal (no
setup) with 100% ampli-
tude.

2. Select the following group

and subjects.
Group : VIDEO
Subject : Bright

Contrast

(Process GAMMA interlock)

1. Check the setting value.

Contrast (White Level): 0
Bright (Black Level):

13

1. Select the following group

and subjects.
Group : OUTPUT2
Subject : PSIG-H

PSIG-L

2. Check the fixed value.

PSIG-H: 90
PSIG-L: 16

PSIG

2.5V DC

5.6V DC

GND

1. Feed the XGA signal and adjust to make the follow-

ing PSIG waveform. (TP1101, TP1201 and TP1301)

Adjust with PSIG-L

Adjust with PSIG-H

1. Select the following group

and subjects.
Group : OUTPUT1
Subject :
On Green adjustment

G1-BLK
G1-GAIN

On Red Adjustment

R1-BLK
R1-GAIN

On Blue Adjustment

B1-BLK
B1-GAIN

2. Make sure the process ad-

justment color bags appear
onscreen.

3. Connect a oscilloscope to

pin(2) of P1301 for the G
setting.

4. Connect the oscilloscope to

pin(1) of P1301 and pin(3)
of P1301 for the R and B
settings, respectively.

White-to-White

Amplitude

1. Select G1-GAIN. Using the set's control switch or

the remote controller's button, adjust the signal am-
plitude to 4.05 Vp-p ± 0.05 V.

2. Now select G1-BLK. Using the set's control switch

or the remote controller's button, adjust the white-
to-white level to 1.70 Vp-p ± 0.05 V.

3. Do the same for the R and B settings.