Sharp 21V1-L Service Manual page 21

MODEL NAME
ADJ US TMENT
ITEM
ADJ US TMENT
P OS ITION
I2C CONTROL
CONTROL
P RE-ADJ US T
OP TION S ET UP , BUS S ET UP
REQUIREMENT
CONTENT US 10CH HALF COLOR BAR
INP UT RF INP UT
FIELD S TRENGTH 56d B V (FIX)
CONDITION
OUTP UT TUNER AGC TERMINAL (J A402 ) OR CRT DIS P LAY CONFIRMATION
(AT SELF ADJUSTMENT MODE)
1) GO TO SERVICE MODE
2) GO TO SERVICE DATA V09, PRESS R/C TO OPEARATE AUTO-AGC KEY AND CONFIRM THE OK
DISPLAY ON THE SCREEN.
3) IF APPEAR NG PLS REPEAT STEP 2 AGAIN.
(AT MANUAL ADJUSTMENT MODE)
ADJ US TMENT
1) ADJUST THE V09 BUS DATA UNTIL AGC TERMINAL VOLTAGE BECOME MAXIMUM, THEN
P ROCEDURE
DROP 0.1V BELOW MAXIMUM VOLTAGE.
2. CHANGE THE ANTENNA INPUT SIGNAL TO 63~67 dBuV, AND MAKE SURE THERE IS NO NOISE
3. CHANGE THE ANTENNA INPUT SIGNAL TO 90~95 dBuV TO BE SURE THAT THERE IS NO
CROSS MODULATION BEAT.
[VOLTAGE CONFIRMATION ]
MAX - 0.1V dc
21V1-L
RF-AGC
V 09 S TEP RANGE
5 – 9
21V1-L
0-127