Service manual

26
20U-FS1
CU20FS1
26-1
26-2
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 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
NO SIGNAL SIGNAL (400HZ 100% MODULATION)
AC 120V, RF INPUT
IC 3001 39 PIN
[CHECKING SPEC]
490 ± 10mVrms (CHECKING SPEC :490 ± 20mVrms)
ADJUSTMENT
ITEM
ADJUSTMENT
POSITION
CONTROL PRE-ADJUST
REQUIREMENT
CONTENT
INPUT
CONDITION
OUTPUT
ADJUSTMENT
PROCEDURE
1) CONNECT 100 µ F ELECTROLLYTIC CAPACITOR BETWEEN C3005
(-ve)-GND
2) ADJUST THE BUS DATA M02 UNTIL THE OUTPUT FREQUENCY OF
39 PIN BECOME AS SPECIFIED BELOW.
NOTE: TO MINIMIZE THE PRODUCTION TIME, ITEM 1) CAN IGNORE.
IF ITEM 2) CAN'T BE ADJUST, THEN ITEM 1) IS REQUIRE.
MTS+VCO ADJUSTMENT
M02 STEP RANGE 0~63
I
2
C BUS CONTROL
OPTION SET UP, BUS SET UP, VCO ADJ, RF-AGC
SIGNAL WITHOUT NOISE (SIGNAL WITHOUT SOUND MODULATION)
AC 120V
IC 3001 39 PIN
[CHECKING SPEC]
62.94 ± 0.75kHz (CHECKING SPEC : 62.94 ± 1.20kHz)