Service manual

27
20U-FS1
CU20FS1
27-1
27-2
ADJUSTMENT
ITEM
ADJUSTMENT
POSITION
CONTROL PRE-ADJUST
REQUIREMENT
CONTENT
INPUT
CONDITION
OUTPUT
ADJUSTMENT
PROCEDURE
1) ADJUST M03 DATA UNITILL OK DISPLAY ON SCREEN ADJUST THE
BUS DATA IN CENTRE OF THE RANGE.
FILTER ADJUSTMENT
M03 STEP RANGE 0~63
I
2
C BUS CONTROL
OPTION SET UP, BUS SET UP, VCO ADJ, RF-AGC, MS-LEVEL, MTS-VCO
SINE WAVE (9.4kHz, 600mVrms)
PIN 14 (FROM C3005 - TERMINAL)
CONFIRMBY CRT SCREEN
[CHECKING SPEC]
REFER TO ABOVE (CHECKING SPEC : ± 2 STEP TO CENTRE)
ADJUSTMENT
ITEM
ADJUSTMENT
POSITION
CONTROL PRE-ADJUST
REQUIREMENT
CONTENT
INPUT
CONDITION
OUTPUT
ADJUSTMENT
PROCEDURE
1) INPUT SIGNAL 1, ADJUST BUS DATA OF M04 UNIT THE OF 39 PIN
BECOME MINIMUM LEVEL.
2) INPUT SIGNAL 1, ADJUST BUS DATA OF M04 UNIT THE AC VOLT-
AGE OF 39 PIN BECOME MINIMUM LEVEL.
3) REPEAT STEP 1) AND 2).
SET THE SOUND VOLUME TO MAXIMUM THEN MAKE SURE THE
READING FROM THE SPEAKER TERMINAL MUST BE OVER THE SPEC
AS SPECIFIED BELOW.
SEPARTION 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-VCO, FILTER
STEREO SIGNAL SIGNAL 1,: MODULATION 30%, L-CH ONLY, NR-ON, 300Hz
SIGNAL 2,: MODULATION 30%, L-CH ONLY, NR-ON, 3kHz
RF INPUT
IC 3001 39 PIN
[CHECKING SPEC]
OVER 25 dB (CHECKING SPEC : OVER 20 dB)