Sharp 21FL91, Service Manual

Page: 17 / 46

17
21FL91
17-1
17-2
H-VCO
V21
STEP RANGE
0-7
I 2
C CONTROL
OPTION SET
UP
, BUS SET
UP
NO SIGNAL (RASTER) CONDITION AC 220V IC 801 PIN 11 (MANU
AL ADJ)
1)
GO
T
O
SER
VICE MODE,
2)
GO
T
O
SER
VICE DA
T
A
V21
,
ADJ UNTIL
FREQ
AS BELOW
(SELF ADJ) 1) GO
T
O
SER
VICE MODE,BY
SELECTING
THE SERVICE DA
T
A
V21
2) PRESS
THE R/C
T
O
OPERA
TE
AUT
O H-VCO,OSD
APPEAR "OK"
A
T
SCREEN
3) IF
APPEAR "NG" PLS REPEA
T
STEP2
[CHECKING SPEC]
FREQ = 15.735
±
0.2 KHz
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE
(A
T SELF ADJUSTMENT MODE)
1)
GO INT
O SER
VICE MODE, BY
SELECTING
THE SER
VICE DA
T
A
V10
2
)
PRESS
THE R/C FOR
AUT
O PIF-VCO KEY
, OSD
APPEAR “OK”
A
T
SCREEN
3)
IF
APPEAR “NG” PLS REPEA
T
STEP2
(A
T MANU
AL ADJUSTMENT MODE)
1)
GO INT
O SER
VICE MODE, BY
SELECTING
THE SER
VICE DA
T
A
V10
2
)
ADJUST
THE DA
T
A
UP/DOWN UNTIL
IC801 PIN 2 VOL
T
AGE BECOME
AS SPECIFIED BELOW
PIF-VCO
V10
STEP RANGE
0~63
I
2
C CONTROL
OPTION SET
UP
, BUS SET
UP
NO SIGNAL (RASTER) CONDITION AC 220V CONFIRMA
TION ON CR
T
DISPLA
Y
(AUT
O), IC801 PIN 2 VOL
T
AGE (MANUAL).
[CHECKING SPEC] 2.5
±
0.5 V DC (CHECKING SPEC : 2.50
±
1.5V)