1. PRECAUTIONS FOR ADJUSTMENT
1.1 Adjustments after Parts Replacement
Part 3: Adjustment
3-1
Memory IC handling
Memory IC (IC1801) 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 IC1801.
Please note that the lamp replacement monitor timer is reset when the
memory IC (IC1801) is replaced.
(Lamp replacement monitor time can not be set to the previous value.)
Caution to memory IC (IC1801) replacement
When IC1801 is replaced with new one, the CPU writes down the default
data of 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 IC1801 is not defective)
When the main board is replaced, IC1801 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.
CAUTION
Condenser Lens Adjustment
❍
●
Condenser Lens (OUT) Adjustment
❍
●
Relay Lens (OUT) Adjustment
❍
●
Contrast Adjustment
R-Contrast adjustment
●
G-Contrast adjustment
●
B-Contrast adjustment
●
Output voltage adjustment
●
Fan voltage adjustment
●
Pedestal adjustment
●
NRS adjustment
●
Signal center adjustment
●
Black level adjustment
●
PC offset adjustment
●
PC gain adjustment
●
AV gain adjustment
●
Common center adjustment
●
●
Gamma shift adjustment
❍
●
White balance adjustment
❍
❍
Disassembly / Replaced Parts
LCD/
Prism
Ass'y
Condenser
lens
Condenser
lens
(OUT)
Relay lens
(OUT)
P.F unit
Power
supply
unit
Main
board
Polarized glass
R
G
B
Optical Adjustments
Electrical Adjustments
●
: Adjustment necessary
❍
: Check necessary
Summary of Contents for LV-7355J
Page 9: ...Part 1 General Information ...
Page 22: ...Part 2 Repair Information ...
Page 43: ...Part 3 Adjustment ...
Page 65: ...Part 4 Troubleshooting ...
Page 82: ...Part 4 Troubleshooting 4 17 BA7078AF Selector IC6241 CXA2101AQ RGB Matrix IC4101 ...
Page 85: ...Part 4 Troubleshooting 4 20 ML60851 USB I F IC9801 M62393 D A IC2571 ...
Page 86: ...Part 4 Troubleshooting 4 21 TB1274AF Video Decoder IC1101 TA1318N AFC Detector IC6171 ...
Page 88: ...Part 5 Parts Catalog ...
Page 89: ......
Page 107: ...Part 6 Electrical Diagrams ...
Page 117: ......