Sanyo C28W1 Service Manual page 50

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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
Service mode adjustments
V-SIZE ADJUSTMENT
1. Receive circular pattern signal.
2. Set the TV to the service mode.
3. Select service item " 1.P V-W" by pressing the
program + or - button.
4. Adjust vertical size by pressing the level + or - button.
V-LINEARITY ADJUSTMENT
1. Receive circular pattern signal.
2. Set the TV to the service mode.
3. Select service item " 2.P V-L" by pressing the program
+ or - button.
4. Adjust vertical linearity by pressing the level + or -
button.
H-WIDTH ADJUSTMENT
1. Receive circular pattern signal.
2. Set the TV to the service mode.
3. Select service item " 5.P H-W" by pressing the
program + or - button.
4. Adjust horizontal width by pressing the level + or -
button.
Part No. 1AA6P2P0706--
F2HV
P
P
TXT
TV
TV
MENU
i
SURROUND
nexTView
BASS
?
1
4
2
3
5
6
7
8
9
0
-/--
CS
X
F
P P
A B
Service Key
VCR
ITEM
1.P V-W
Adjustment Item
Adjustment data
Screen Mode
Initial Data
Range of Data
50Hz FULL
35
00~127
50Hz FULL
16
00~31
50Hz FULL
04
00~31
50Hz FULL
00
00~15
50Hz FULL
26
00~63
50Hz FULL
36
00~63
50Hz FULL
3
00~15
50Hz FULL
30
00~63
50Hz FULL
10
00~15
50Hz FULL
00
00~15
PINCUSHION ADJUSTMENT
1. Receive cross hatch pattern signal.
2. Set the TV to the service mode.
3. Select service item " 6.P PCC" by pressing the
program + or - button.
4. Adjust so that the vertical lines straight by pressing the
level + or - button.
KEYSTONE ADJUSTMENT
1. Receive cross hatch pattern signal.
2. Set the TV to the service mode.
3. Select service item " 8.P PHA" by pressing the
program + or - button.
4. Adjust the trapezium distortion by pressing the level +
or - button.
POSITION OF SCREEN DISPLAY
1. Set the TV to the service mode.
2. Select service item " 72.OSD" by pressing the program
+ or - button.
3. Adjust the position of screen display by pressing the
level + or - button.
(SHEET 7/7)
Item
Adjustment
11.P H-W
H-Width
12.P PCC
Pincushion
13.P V-W
V-Size
14.P V-S
V-S Correction
15.P H-W
H-Width
16.P PCC
Pincushion
17.P V-W
V-Size
18.P PCC
Pincushion
19.P V-W
V-Size
20.P PCC
Pincushion
21.P PHA
Keystone Correction
22.N V-W
V-Size
23.N V-L
V-linearity
24.N V-S
V-S Correction
25.N VSB
V-Correction
26.N H-W
H-Width
27.N PCC
Pincushion
28.N C-P
Corner Comp.
29.N PHA
Keystone Correction
30.N HCO
H-Correction
31.N VGM
V-∫ Correction
32.N H-W
H-Width
33.N PCC
Pincushion
34.N V-W
V-Size
35.N V-S
V-S Correction
36.N H-W
H-Width
37.N PCC
Pincushion
Function Button
38.N V-W
V-Size
39.N PCC
Pincushion
40.N V-W
V-Size
41.N PCC
Pincushion
42.N PHA
Keystone Correction
43.WHT
Ident.time for Screen mode
44.WHG
Tore lance of Ident. screen
45.WHS
Threshold level
46.TIL
Ident time for Title mode
47.WHR
Ident time for unstable
48.P WDB
Ident value of picture start
49.P WDE
Ident value of blanking start
50.P WBP
V-blanking start value
51.P WBP
V-blanking end value
52.P WBZ
V-blanking start value
53.P WBZ
V-blanking end value
54.P WBT
V-blanking start value
55.P WBT
V-blanking end value
56.N WDB
Ident value of picture start
57.N WDE
Ident value of blanking start
58.N WBP
V-blanking start value
59.N WBP
V-blanking end value
60.N WBZ
V-blanking start value
61.N WBZ
V-blanking end value
62.N WBT
V-blanking start value
63.N WBT
V-blanking end value
64.WCR
Contrast comp. value
65.MAX
NICAM MAX
66.MIN
NICAM MIN
DATA
67.ATT
NICAM ATT to equalise sound level FM/NICAM
68.K1
A2 STEREO K1 for stereo separation
37
69.K2
A2 STEREO K2 for stereo separation
70.STID
A2 STEREO ident speed
71.OSC
Position of screen display
72.TXT
Maximum contrast value in the teletext
73.P V-W
Zoom 16:9 V-Size
74.P PCC
Zoom 16:9 Pcc
75.P H-W
Zoom 16:9 H-Width
76.N V-W
Zoom 16:9 V-Size
77.N PCC
Zoom 16:9 Pcc
78.N H-W
Zoom 16:9 H-Width
79.P WDB
Zoom 16:9 Ident value of picture start 50Hz
80.P WDE
Zoom 16:9 Ident value of blanking start 50Hz
81.P WBZ
Zoom 16:9 V-blanking start value
82.P WBZ
Zoom 16:9 V-blanking end vale
83.N WDB
Zoom 16:9 Ident value of picture start 60Hz
Remarks
84.N WBD
Zoom 16:9 Ident value of blanking start 60Hz
85.N WBZ
Zoom 16:9 V-blanking start value
86.N WBZ
Zoom 16:9 V-blanking end vale
SPECIAL FUNCTIONS
ITEM-1
Screen Mode
Initial Data
50Hz NORMAL
+26
50Hz NORMAL
00
50Hz PITTARI
+07
50Hz PITTARI
+06
50Hz PITTARI
+16
50Hz PITTARI
+04
50Hz ZOOM
+26
50Hz ZOOM
+21
50Hz TITLE IN
-12
50Hz TITLE IN
+09
50Hz TITLE IN
-30
60Hz FULL
00
60Hz FULL
00
60Hz FULL
00
60Hz FULL
00
60Hz FULL
00
60Hz FULL
00
60Hz FULL
00
60Hz FULL
00
60Hz FULL
00
60Hz FULL
00
60Hz NORMAL
00
60Hz NORMAL
00
60Hz PITTARI
00
60Hz PITTARI
00
60Hz PITTARI
00
60Hz PITTARI
00
60Hz ZOOM
00
60Hz ZOOM
00
60Hz TITLE IN
00
60Hz TITLE IN
00
60Hz TITLE IN
00
15
+03
07
06
30
50Hz
12
50Hz
54
50Hz PITTARI
72
50Hz PITTARI
12
50Hz ZOOM
61
50Hz ZOOM
23
50Hz TITLE IN
74
50Hz TITLE IN
23
60Hz
15
60Hz
31
60Hz PITTARI
61
60Hz PITTARI
60Hz ZOOM
53
60Hz ZOOM
18
60Hz TITLE IN
61
60Hz TITLE IN
18
ZOOM/TITLE IN
05
195
160
04
-1
-11
00
14
01
50Hz
+14
50HZ
+12
50Hz
00
60Hz
00
60Hz
00
60Hz
00
58
50Hz
65
50Hz
15
34
60Hz
60
60Hz
13
This TV set allows you to set up the following
special functions.
Prohibition of presetting
ITEM-1
SET 0
Sets the prohibition of presetting and CS key entry.
SET
1
2
SET
Start up programme position
ITEM-2
Presets the programme position when the set is
switched on.
SET
SET
Service Key
SETTING PROCEDURE
1
1
Press and hold the SERVICE Key on the on the front
control panel, the press the Recall button on the
remote control handset.
2
To select the "ITEM" number, press the Programme
up/down button on the remote control handset.
3
To select the "SET" number,press the Level
up/down button repeatedly.
4
To return to the normal TV mode, press the Recall
button.
The setting conditions of all items can be confirmed.
Special functions are not cancelled if the TV set is
switched off or the mains disconnected.
Range of Data
Remarks
±63
±63
±127
±31
±63
±63
±127
±63
±127
±63
±63
±127
±31
±31
±15
±63
±63
±15
±63
±15
±15
±63
±63
±127
±31
±63
±63
±127
±63
±127
±63
±63
00~31
±15
00~15
00~31
00~31
02~30
21~58
00~75
00~75
00~75
00~75
00~75
00~75
09~30
04~34
00~63
9
00~63
00~63
00~63
00~63
00~63
00~31
00~255
00~255
00~12
-04~+05
-24~+25
00~02
00~31
00~63
±127
±63
±63
±127
±63
±63
5
2~30
21~58
0~75
0~75
9
2~30
21~58
0~75
0~75
0
NO
1
YES
0
Last programme position start
1
"AV1" start

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