Sharp 21FL94 Service Manual - Page 18

H-vco, Manual, Self Adj, Checking Spec], Freq = 15.735, 2 Khz, At Self Adjustment Mode, At Manual - service manual

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21FL94 18 ADJUSTMENT ITEM ADJUSTMENT POSITION V21 H-VCO STEP RANGE 0-7 CONTROL I2C CONTROL PRE-ADJUST REQUIREMENT OPTION SET UP, BUS SET UP CONTENT NO SIGNAL (RASTER) CONDITION INPUT CONDITION AC 220V 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 ADJUSTMENT ITEM ADJUSTMENT POSITION V10 PIF-VCO STEP RANGE 0~63 CONTROL I2C CONTROL PRE-ADJUST REQUIREMENT OPTION SET UP, BUS SET UP CONTENT NO SIGNAL (RASTER) CONDITION INPUT CONDITION AC 220V 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 STEP2 (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] FREQ = 15.735 ± 0.2 KHz HISTORY SYMBOL REVISED CONTENT, OF REVISION 18-1 [CHECKING SPEC] 2.5 ± 0.5 V DC (CHECKING SPEC : 2.50 ± 1.5V) HISTORY SYMBOL REVISED CONTENT, OF REVISION 18-2

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18
18-1
18-2
21FL94
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
(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
[CHECKING SPEC]
FREQ = 15.735
±
0.2 KHz
SYMBOL
REVISED CONTENT,
ADJUSTMENT
ITEM
ADJUSTMENT
POSITION
CONTROL
PRE-ADJUST
REQUIREMENT
CONTENT
INPUT
CONDITION
OUTPUT
ADJUSTMENT
PROCEDURE
HISTORY
OF REVISION
ADJUSTMENT
ITEM
ADJUSTMENT
POSITION
CONTROL
PRE-ADJUST
REQUIREMENT
CONTENT
INPUT
CONDITION
OUTPUT
ADJUSTMENT
PROCEDURE
HISTORY
OF REVISION
(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 STEP2
(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
PIF-VCO
V10
STEP RANGE
0~63
I
2
C CONTROL
OPTION SET UP, BUS SET UP
NO SIGNAL (RASTER) CONDITION
AC 220V
CONFIRMATION ON CRT DISPLAY (AUTO), IC801 PIN 2 VOLTAGE (MANUAL).
[CHECKING SPEC]
2.5
±
0.5 V DC (CHECKING SPEC : 2.50
±
1.5V)
SYMBOL
REVISED CONTENT,