Sharp 14V-R70M Service Manual page 18

ADJUSTMENT
ITEM
ADJUSTMENT
V21
POSITION
CONTROL
I C CONTROL
2
PRE-ADJUST
OPTION SET UP, BUS SET UP
REQUIREMENT
CONTENT
NO SIGNAL (RASTER) CONDITION
INPUT
AC 230V
CONDITION
OUTPUT
IC 801 PIN 11
(MANUAL ADJ)
1) GO TO SERVICE MODE,
2) GO TO SERVICE DATA V21, ADJ UNTIL FREQ AS BELOW
(SELF ADJ)
1) GO TO SERVICE MODE,BY SELECTING THE SERVICE DATA V21
2) PRESS THE R/C TO OPERATE AUTO H-VCO,OSD APPEAR "OK" AT
SCREEN
3) IF APPEAR "NG" PLS REPEAT STEP2
ADJUSTMENT
PROCEDURE
[CHECKING SPEC]
FREQ = 15.735 ± 0.2 KHz
HISTORY SYMBOL REVISED CONTENT,
OF REVISION
H-VCO
STEP RANGE 0-7
18-1
ADJUSTMENT
ITEM
ADJUSTMENT
V10
POSITION
CONTROL
I C CONTROL
2
PRE-ADJUST
OPTION SET UP, BUS SET UP
REQUIREMENT
CONTENT NO SIGNAL (RASTER) CONDITION
INPUT
AC 230V
CONDITION
OUTPUT CONFIRMATION ON CRT DISPLAY (AUTO), IC801 PIN 2 VOLTAGE (MANUAL).
(AT SELF ADJUSTMENT MODE)
1) GO INTO SERVICE MODE, BY SELECTING THE SERVICE DATA V10
2) PRESS THE R/C FOR AUTO PIF-VCO KEY, OSD APPEAR "OK" AT
SCREEN
3) IF APPEAR "NG" PLS REPEAT STEP 2
(AT MANUAL ADJUSTMENT MODE)
1) GO INTO SERVICE MODE, BY SELECTING THE SERVICE DATA V10
2) ADJUST THE DATA UP/DOWN UNTIL IC801 PIN 2 VOLTAGE BECOME
AS SPECIFIED BELOW
ADJUSTMENT
PROCEDURE
[CHECKING SPEC]
2.5 ± 0.5 V DC (CHECKING SPEC : 2.50 ± 1.5V)
SYMBOL REVISED CONTENT,
HISTORY
OF REVISION
PIF-VCO
STEP RANGE 0~63
18-2