Adjustments In The Service Mode - Sanyo C28W1 Service Manual

ADJUSTMENTS IN THE SERVICE MODE

Since some chassis circuit adjustments are controlled by the CPU built into the chassis, adjustments can now be
made by inputting data directly via the remote control handset supplied with the set.
Memory IC replacement
Since adjustment data for the circuit is stored in the memory IC (IC802) that comes with the CPU, the adjustment
data must be re-input when the memory IC is replaced.
(After memory IC replaced, reference data is initially written automatically to memory from the CPU ROM for basic
set operation.)
1. Setting of the service mode.
To enter service mode, press and hold the SERVICE key on the
front control panel, then press the Function button on the
remote control handset.
2. Screen display of the service mode.
Adjustment items can be selected by pressing the Prog.
up/down button on the remote control handset.
Adjustment data can be set by pressing Level
up/down button on the remote control handset.
3. To exit from the service mode.
To exit from the service mode, turn off the TV set by
pressing the power on/off button on the TV set or
remote control handset.
The adjustments in the service mode are listed below table.
The data in each adjustment item is set with the best setting value in the CPU ROM as initial data.
As the shaded adjustment items are adjusted for each TV set individually, it may slightly differ to the initial data.
When the memory IC is replaced, these adjustments should be readjusted according to service mode adjustments
described next page.
Item Adjustment
1.P V-W V-Size
2.P V-L V-linearity
3.P V-S V-S Correction
4.P VSB V-Correction
5.P H-W H-Width
6.P PCC Pincushion
7.P C-P Corner Comp.
8.P PHA Keystone Correction
9.P HCO H-Correction
10.P VGM V-∫ Correction
F2HT
Service Key
Adjustment Item
Screen Mode Initial Data
50Hz FULL
50Hz FULL
50Hz FULL
50Hz FULL
50Hz FULL
50Hz FULL
50Hz FULL
50Hz FULL
50Hz FULL
50Hz FULL
-17-
P
P
MENU i TXT TV TV
SURROUND nexTView
BASS ?
1 2 3 4
5 7
6 8
9 0 CS
-/--
F
X
P P A B
VCR
ITEM
1.P V-W
Adjustment data
Range of Data
35 00~127
16 00~31
04 00~31
00 00~15
26 00~63
36 00~63
3 00~15
30 00~63
10 00~15
00 00~15
Function Button
DATA
37
Remarks