Sanyo PLV-55WM1, Service Manual

Page: 50 / 152

- 50 -
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
●
Common center adjustment
● ●
Gamma adjustment
●
White balance adjustment
❍ ❍
Color shading correction
●
: Adjustment necessary
❍
: Check necessary
■
Adjustments after Parts Replacement
Disassembly / Replaced Parts
LCD/
Prism
unit
Polarized glass
R G B
Optical Adjustments
Electrical Adjustments
Sub
Power
Board
Main
Board
Screen
and
mirror
Power
Board
Net
Socket
Board
Projec-
tion
lens
After replacing electrical parts and optical parts, electrical adjustments and optical adjustments are required.
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
When IC821 is replaced with new one, the CPU writes
down the default data of the service adjustments to
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-
adjustments following to the “Electrical Adjustments”.
In this case, the lamp replace counter can be kept the
value as before.
●
Memory IC Replacement
Cautio
en IC82
n to m
21 is r
on to me n
82
emory
replac
m me
r d w
place
new
m
on
ment
e, the CPU write
ents
s
adju
th
tmen
s cas
s foll
e, the , la
to the
repla p
Ele
ce co
ctrical A
unter ca
After replac elec rical parts and optica parts ele rical adjust
y cessa eck ne
ired.
❍
: Ch
e req
ary
❍
s a
ecessa
stme
ent n
l adju
djustm
optica
G G G Gain in n n a a tm nt
● ● ●