Sharp 20CT-250 Service Manual page 5

* 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
01H : 20H
E 2 PROM item Data adjustable range
(00H) ––––––––––
(01H) ––––––––––
(02H) ––––––––––
(03H) ––––––––––
R CUT OFF 0 ~
G CUT OFF 0 ~
B CUT OFF 0 ~
G DRIVE 0 ~
B DRIVE 0 ~
50Hz V-AMP 0 ~
50Hz V-LINEARITY 0 ~
50Hz S-CORRECTION 0 ~
50Hz V-PHASE 0 ~
50Hz H-PHASE 0 ~
V-BLK ST 50 0 ~
V-BLK SP 50 0 ~
60Hz V-AMP 0 ~
60Hz V-LINEARITY 0 ~
60Hz S-CORRECTION 0 ~
60Hz V-PHASE 0 ~
60Hz H-PHASE 0 ~
60Hz V BLK ST 0 ~
60Hz V BLK SP 0 ~
SECAM R-Y 0 ~
SECAM B-Y 0 ~
SUB-CONTRAST 0 ~
SUB-BRIGHT 0 ~
SUB-COLOUR 0 ~
SUB-TINT 0 ~
SUB-SHARPNESS 0 ~
Y SUB-CONTRAST 0 ~
DT PAL TV/AV 0 ~
DT SECAM TV/AV 0 ~
DT NTSC TV/AV 0 ~
DT B/W TV/AV 0 ~
V-MUTE
A/V 2
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.
02H : 13H
03H : 61H
Data initial value Remarks
23H
20H
13H
61H
255 0
255 0
255 0
255 127
255 127
127 58
31 16
127 67 *1
7 5 –3
31 7 +5
63 58→63 (50Hz)
127 25
127 59
31 14
127 74
7 2
31 12
63 60→63 (60Hz)
127 20
15 10
15 6
255 255
255 127
255 110
127 70
63 28
31 18
7 2/2
7 4/4
7 2/2
7 2/2
ON/OFF OFF
1/2 1
5-1
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.)
POS RECEPTION FREQ (MHZ)
1 48.25
2 62.25
3 77.25
4 175.25
5 182.25
6 183.25
7 191.25
8 196.25
9 210.25
10 224.25
11 471.25
12 487.25
13 503.25
*1 14 575.25
15 599.25
*1
16 621.25
17 639.25
18 703.25
19 735.25
20 767.25
*2
*4
(1) The following key-in data have been factory-set for the E
SKIP
*2
AFT
C-SYSTEM
S-SYSTEM
LAST POWER
LAST TV/AV
*2
DIGIT
*2
*2 LANGUAGE
*2
BLUE BACK
*2
LAST POS
LAST FB POS
VOLUME
CONTRAST
COLOUR
BRIGHTNESS
TINT
SHARPNESS
S-SYSTEM POS RECEPTION FREQ (MHZ)
B/G 21 815.25
B/G 22 855.25
D/K 23 855.25
B/G 24 55.25
B/G 25 83.25
D/K 26 183.25
D/K 27 193.25
D/K 28 471.25
B/G 29 477.25
B/G 30 693.25
B/G 31 885.25
I 32 112.25
B/G 33 168.25
B/G 34 FREE
B/G 35 294.25
– 36 463.25
D/K 37 FREE
B/G 38 647.25
I 39 663.25
B/G 40 679.25
FACTORY SETTING
2 PROM.
Item Setting
OFF
ON
AUTO
B/G
ON
TV
1DIG
THAI
ON
1
1
MIN
MAX
CENT
CENT
CENT
CENT
5-2
S-SYSTEM
B/G
I
B/G
B/G
B/G
–
–
B/G
–
–
B/G
B/G
B/G
–
B/G
B/G
–
B/G
B/G
B/G