Sharp 20CT-250, Service Manual

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5
5-1 5-2
20CT
-250
INITIAL SETTINGS OF CHANNEL SELECTION DATA
(1) Make an entry of MCL1 in the service mode in order to set the following channel selection data to the
E 2 PROM. And select the POS1 channel. (An MCL2, -3 or -4 input makes different settings.)
* To go to the service mode, the data at the E 2 PROM’s addresses 00H thru 03H are read. If the data are not as
given below, the E 2 PROM is initialized according to the table below.
Address : Data
00H : 23H 02H : 13H
01H : 20H 03H : 61H
E 2 PROM item Data adjustable range Data initial value Remarks
(00H) –––––––––– 23H
(01H) –––––––––– 20H
(02H) –––––––––– 13H
(03H) –––––––––– 61H
R CUT OFF 0 ~ 255 0
G CUT OFF 0 ~ 255 0
B CUT OFF 0 ~ 255 0
G DRIVE 0 ~ 255 127
B DRIVE 0 ~ 255 127
50Hz V-AMP 0 ~ 127 58
50Hz V-LINEARITY 0 ~ 31 16
50Hz S-CORRECTION 0 ~ 127 67 *1
50Hz V-PHASE 0 ~ 7 5 –3 *1
50Hz H-PHASE 0 ~ 31 7 +5 *1
V-BLK ST 50 0 ~ 63 58
→
63 (50Hz)
V-BLK SP 50 0 ~ 127 25
60Hz V-AMP 0 ~ 127 59
60Hz V-LINEARITY 0 ~ 31 14
60Hz S-CORRECTION 0 ~ 127 74 *2
60Hz V-PHASE 0 ~ 7 2 *4
60Hz H-PHASE 0 ~ 31 12
60Hz V BLK ST 0 ~ 63 60
→
63 (60Hz)
60Hz V BLK SP 0 ~ 127 20
SECAM R-Y 0 ~ 15 10
SECAM B-Y 0 ~ 15 6
SUB-CONTRAST 0 ~ 255 255 *2
SUB-BRIGHT 0 ~ 255 127
SUB-COLOUR 0 ~ 255 110
SUB-TINT 0 ~ 127 70
SUB-SHARPNESS 0 ~ 63 28
Y SUB-CONTRAST 0 ~ 31 18 *2
DT PAL TV/AV 0 ~ 7 2/2 *2
DT SECAM TV/AV 0 ~ 7 4/4 *2
DT NTSC TV/AV 0 ~ 7 2/2 *2
DT B/W TV/AV 0 ~ 7 2/2 *2
V-MUTE ON/OFF OFF
A/V 2 1/2 1
NVM With all the adjustments complete, do not change the data of addresses 00H thru 03H. Other-
wise the E
2 PROM will be initialized when the AC power is turned on.
*1 : These data are additionally adjusted for 60Hz based on the 50Hz settings.
*2 : Unless otherwise specified, these data are fixed and need no adjustment.
*4 : Only 0 through 5 must be used in changing the data.
POS RECEPTION FREQ (MHZ) S-SYSTEM
1 48.25 B/G
2 62.25 B/G
3 77.25 D/K
4 175.25 B/G
5 182.25 B/G
6 183.25 D/K
7 191.25 D/K
8 196.25 D/K
9 210.25 B/G
10 224.25 B/G
11 471.25 B/G
12 487.25 I
13 503.25 B/G
14 575.25 B/G
15 599.25 B/G
16 621.25 –
17 639.25 D/K
18 703.25 B/G
19 735.25 I
20 767.25 B/G
POS RECEPTION FREQ (MHZ) S-SYSTEM
21 815.25 B/G
22 855.25 I
23 855.25 B/G
24 55.25 B/G
25 83.25 B/G
26 183.25 –
27 193.25 –
28 471.25 B/G
29 477.25 –
30 693.25 –
31 885.25 B/G
32 112.25 B/G
33 168.25 B/G
34 FREE –
35 294.25 B/G
36 463.25 B/G
37 FREE –
38 647.25 B/G
39 663.25 B/G
40 679.25 B/G
FACTORY SETTING
(1) The following key-in data have been factory-set for the E
2
PROM.
Item Setting
SKIP OFF
AFT ON
C-SYSTEM AUTO
S-SYSTEM B/G
LAST POWER ON
LAST TV/AV TV
DIGIT 1DIG
LANGUAGE THAI
BLUE BACK ON
LAST POS 1
LAST FB POS 1
VOLUME MIN
CONTRAST MAX
COLOUR CENT
BRIGHTNESS CENT
TINT CENT
SHARPNESS CENT