Sharp 21FL94 Service Manual - Page 23

High Voltage, Caution Point], Ms Level Adjustment, Checking Spec]

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ADJUSTMENT ITEM ADJUSTMENT POSITION - HIGH VOLTAGE STEP RANGE - CONTROL - PRE-ADJUST REQUIREMENT AFTER ALL ADJUSTMENT FINISHED. CONTENT US 4 CH LION HEAD (MONOSCOPE PATTERN) INPUT CONDITION AC 220V, RF INPUT OUTPUTΩ CRT ANODE VOLTAGE SET THE USER CONTROL TO SHIPMENT SETTING POSITION. PUSH ON Y-MUTE BY R/C CONFIRM THE VOLTAGE OF CRT ANODE BY HIGH VOLTAGE METER AND MAKE SURE THE READING IS AS BELOW. HIGH VOLTAGE BELOW 30kV ADJUSTMENT PROCEDURE ADJUSTMENT ITEM ADJUSTMENT POSITION M01 MS LEVEL ADJUSTMENT STEP RANGE CONTROL I2C BUS CONTROL PRE-ADJUST REQUIREMENT OPTION SET UP, BUS SET UP, VCO ADJ, RF-AGC CONTENT MONORAL SIGNAL (400HZ 100% MODULATION) INPUT CONDITION AC 220V, RF INPUT OUTPUT IC 3001 39 PIN 0~15 1) SET THE SOUND VOLUME CONTROL MORE THAN 1. 2) ADJUST BUS DATA OF M01 UNTIL THE VOLTAGE OF 39 PIN BE- COME AS SPECIFIED BELOW. ADJUSTMENT PROCEDURE 21FL94 23 [CAUTION POINT] USE ELECTROSTATIC HI-VOLTAGE METER AND FOLLOW THE UL/ DHHS STANDARD TO MAKE CORRECTION AND CONTROL. HISTORY SYMBOL REVISED CONTENT, OF REVISION 23-1 [CHECKING SPEC] 490 ± 10mVrms (CHECKING SPEC :490 ± 20mVrms) HISTORY SYMBOL REVISED CONTENT, OF REVISION 23-2

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23
21FL94
23-1
23-2
HIGH VOLTAGE
–
STEP RANGE
–
–
AFTER ALL ADJUSTMENT FINISHED.
US 4 CH LION HEAD (MONOSCOPE PATTERN)
AC 220V, RF INPUT
CRT ANODE VOLTAGE
SET THE USER CONTROL TO SHIPMENT SETTING POSITION. PUSH
ON Y-MUTE BY R/C CONFIRM THE VOLTAGE OF CRT ANODE BY HIGH
VOLTAGE METER AND MAKE SURE THE READING IS AS BELOW.
[CAUTION POINT]
USE ELECTROSTATIC HI-VOLTAGE METER AND FOLLOW THE UL/
DHHS STANDARD TO MAKE CORRECTION AND CONTROL.
SYMBOL
REVISED CONTENT,
ADJUSTMENT
ITEM
ADJUSTMENT
POSITION
CONTROL
PRE-ADJUST
REQUIREMENT
CONTENT
INPUT
CONDITION
OUTPUT
Ω
ADJUSTMENT
PROCEDURE
HISTORY
OF REVISION
HIGH VOLTAGE
BELOW
30kV
ADJUSTMENT
ITEM
ADJUSTMENT
POSITION
CONTROL
PRE-ADJUST
REQUIREMENT
CONTENT
INPUT
CONDITION
OUTPUT
ADJUSTMENT
PROCEDURE
HISTORY
OF REVISION
1)
SET THE SOUND VOLUME CONTROL MORE THAN 1.
2)
ADJUST BUS DATA OF
M01
UNTIL THE VOLTAGE OF 39 PIN BE-
COME AS SPECIFIED BELOW.
MS LEVEL ADJUSTMENT
M01
STEP RANGE
0~15
I
2
C BUS CONTROL
OPTION SET UP, BUS SET UP, VCO ADJ, RF-AGC
MONORAL SIGNAL (400HZ 100% MODULATION)
AC 220V, RF INPUT
IC 3001 39 PIN
[CHECKING SPEC]
490
±
10mVrms (CHECKING SPEC :490
±
20mVrms)
SYMBOL
REVISED CONTENT,