Sharp 20F630, Service Manual

Page: 27 / 64

27
27-1
27-2
20F630
CU20F630
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT ADJUSTMENT PROCEDURE
1
)
INPUT
SIGNAL
1,
ADJUST
BUS DA
T
A
OF M04 UNIT
THE OF 39 PIN
BECOME MINIMUM LEVEL.
2
)
INPUT
SIGNAL
1,
ADJUST
BUS DA
T
A
OF M04 UNIT
THE
AC VOL
T
-
AGE OF 39 PIN BECOME MINIMUM LEVEL.
3)
REPEA
T
STEP
1)
AND 2).
SET
THE SOUND VOLUME
T
O
MAXIMUM
THEN MAKE SURE
THE
READING FROM
THE SPEAKER
TERMINAL
MUST
BE OVER
THE SPEC
AS SPECIFIED BELOW
.
SEP
ARA
TION ADJUSTMENT
M04, M05
STEP
RANGE
0~63
I 2
C BUS CONTROL
OPTION SET
UP
, BUS SET
UP
, VCO
ADJ, RF-AGC, MS-LEVEL, MTS-V
CO, FIL
TE
R
STEREO SIGNAL
SIGNAL
1,: MODULA
TION 30%, L-CH ONL
Y
, NR-ON, 300Hz
SIGNA
L
2
,: MODULA
TION 30%, L-CH ONL
Y
, NR-ON, 3kHz
RF INPUT IC 3001 39 PIN
[CHECKING SPEC] OVER 25 dB (CHECKING SPEC : OVER 20 dB)