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■ Adjustments after Parts Replacement
After replacing electrical parts and optical parts, electrical adjustments and optical adjustments are required.
After replac
elec rical parts and optica parts ele rical adjust
Contrast Adjustment
R-Contrast adjustment
G-Contrast Adjustment
B-Contrast adjustment
Condenser lens adjustment
Relay lens adjustment
Picture image adjustment
Picture focus adjustment
Output voltage adjustment
Fan minimum voltage adjustment
Video signal center adjustment
PC black level adjustment
Pedestal adjustment
Gain adjustment
G G G G ain
in
n
n a
a
tm nt
Common center adjustment
Gamma adjustment
White balance adjustment
Color shading correction
●
Memory IC Replacement
IC821 on the main board stores the data for the serv-
ice adjustments, and should not be replaced except
for the case of defective device.
If replaced, it should be performed the re-adjustments
following to the "Electrical Adjustments".
The data of lamp replacement monitor timer is stored
in the IC821.
Please note that the lamp replace counter is reset
when the memory IC (IC821) is replaced.
(Lamp replace counter can not be set to the previous
value.)
● Caution to memory IC replacement
Cautio
on to me
n
n to m
m e
m
emory
When IC821 is replaced with new one, the CPU writes
en IC82
82
21 is r
r
replac
d w
down the default data of the service adjustments to
LCD/
Prism
unit
❍
❍
❍
❍
❍
❍
❍
●
❍
place
m
ment
new
on
e, the CPU write
s
ents
optica
l adju
●
: Adjustment necessary
djustm
Disassembly / Replaced Parts
Screen
Projec-
Polarized glass
and
tion
R
mirror
lens
●
●
●
●
●
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the replaced IC, refer to the service adjustment table.
As these data are not the same data as factory
shipped data, it should be required to perform the re-
adjustments following to the "Electrical Adjustments".
Please note that in this case the lamp replace counter
will be reset.
● Caution of Main Board replacement (in the case
IC821 is not defective)
When the main board is replaced, IC821 should be
replaced with the one on previous main board. After
replacement, it should be required to perform the re-
adju
adjustments following to the "Electrical Adjustments".
tmen
s foll
In this case, the lamp replace counter can be kept the
th
s cas
e, the
,
la
value as before.
- 50 -
stme
s a
e req
ired.
❍
❍
❍
ent n
ecessa
ary
: Check necessary
: Ch
eck ne
Net
Sub
Power
Power
Socket
Board
G
B
Board
Board
●
❍
●
to the
Ele
ctrical A
repla
p
ce co
unter ca
cessa
y
Main
Board
●
●
●
●
●
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●
●
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❍
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