Sharp 21FL91, Service Manual

Page: 22 / 46

22
22-1
22-2
21FL91
HIGH V
O
L
T
A
G
E
–
STEP RANGE
–
–
AFTER ALL
ADJUSTMENT
FINISHED.
US 4 CH LION HEAD (MONOSCOPE P
A
TTERN)
AC 220V
, RF INPUT
CR
T
ANODE
VOL
T
AGE
SET
THE USER CONTROL
T
O
SHIPMENT
SETTING POSITION. PUSH
ON
Y
-MUTE BY
R/C CONFIRM
THE VOL
T
AGE OF CR
T
ANODE BY HIGH
VOL
T
AGE METER
AND MAKE SURE
THE READING IS
AS BELOW
.
[CA
UTION POINT]
USE ELECTROST
A
TIC HI-VOL
T
AGE METER
AND FOLLOW THE UL/
DHHS ST
ANDARD
T
O
MAKE CORRECTION
AND CONTROL.
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
Ω
ADJUSTMENT PROCEDURE
HIGH V
O
L
T
A
G
E
BELOW
30kV
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE
1)
SET
THE SOUND VOLUME CONTROL
MORE
THAN 1.
2
)
ADJUST
BUS DA
T
A
OF
M01
UNTIL
THE VOL
T
AGE 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% MODULA
TION)
AC 220V
, RF INPUT
IC 3001 39 PIN
[CHECKING SPEC] 490
±
10mV
rms (CHECKING SPEC :490
±
20mV
rms)