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1. PRECAUTIONS FOR ADJUSTMENT
Memory IC handling
Memory IC (IC808) on the main board stores the data for the service
adjustments, and should not be replaced except for the case of defective device.
The data of lamp replacement monitor timer is stored in the IC808.
Please note that the lamp replacement monitor timer is reset when the memory
IC (IC808) is replaced. (Lamp replacement monitor time can not be set to the
previous value.)
Caution to memory IC (IC808) replacement
When IC808 is replaced with new one, the CPU writes down the default data of
CAUTION
the service adjustments to the replaced IC. 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 the lamp replacement monitor timer is reset.
Caution of Main Board replacement (in the case IC808 is not defective)
When the main board is replaced, IC808 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 replacement monitor timer can be kept the value as before.
1.1 Adjustments after Parts Replacement
Condenser Lens Adjustment
Relay Lens Adjustment
Contrast Adjustment
R-Contrast adjustment
G-Contrast adjustment
B-Contrast adjustment
Output voltage adjustment
+16V adjustment
Video center adjustment
PSIG adjustment
PC pedestal adjustment
Black level adjustment
PC gain adjustment
PC gamma shift adjustment
HDTV pedestal adjustment
HDTV A/D input adjustment
HDTV gain adjustment
Video pedestal adjustment
Video A/D adjustment
A/D offset adjustment
Video gain adjustment
Video gamma shift adjustment
Common center adjustment
White balance adjustment
Disassembly / Replaced Parts
Condenser
Relay
LCD/Prism
lens
lens
Ass'y
3-1
: Adjustment necessary
Powe
Polarized glass
Sub power
supply
supply unit
R
G
B
unit
Part 3: Adjustment
: Check necessary
Main
board
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