Sharp 21V-FW100S Service Manual page 20

21V-FW100S
MODEL NAME
ADJUSTMENT
ITEM
ADJUSTMENT
POSITION
I2C CONTROL
CONTROL
PRE-ADJUST
OPTION SET UP, BUS SET UP
REQUIREMENT
US10CH HALF COLOR BAR
CONTENT
INPUT RF INPUT
FIELD STRENGTH 53dBµV(FIX)
CONDITION
TUNER AGC TERMINAL (JA442 OR TP 201) OR CRT DISPLAY CONFIRMATION
OUTPUT
(AT SELF ADJUSTMENT MODE)
1.GO TO SERVICE MODE
2.GO TO SERVICE DATA V08, 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)
ADJUSTMENT
1. ADJUST THE V08 BUS DATA UNTIL AGC TERMINAL VOLTAGE BECOME MAXIMUM,THEN DROP
PROCEDURE
2. CHANGE THE ANTENNA INPUT SIGNAL TO 63~67 dBuV, AND MAKE SURE THERE IS NO
3. CHANGE THE ANTENNA INPUT SIGNAL TO 90~95 dBuV TO BE SURE THAT THERE IS NO
[VOLTAGE CONFIRMATION ]
MAX - 0.1V dc
HISTORY
OF REVISION
V 08
0.1V BELOW MAXIMUM VOLTAGE.
NOISE.
CROSS MODULATION BEAT.
REVISED CONTENT .
SYMBOL
21V-FW100S
RF-AGC
STEP RANGE
5 – 9
0-127