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18
PIN20
PIN21
PIN19
TAPE-MONI
AUX
FM/AM
CD
PHONO
PIN17
SEARCH
DISPLAY
PTY SELECT
PIN18
TUN/CH MODE
P. SCAN
MEMORY
FM MODE
TUNED-DN
TUNED-UP
I/O
1 kohm
1.5 kohm
1.8 kohm
2.7 kohm
3.3 kohm
Key Matrix
IMPORTANT
1. Check power-source voltage.
2. Set the function switch to band aligned.
3. Keep the signal input as low as possible to adjust accurately.
4. Modulation and Modulation frequency.
6.MEASUREMENTS AND ADJUSTMENTS
ALIGNMENT INSTRUCTIONS
Equipment needed:
AM Standard Signal Generator
FM Standard Signal Generator
Oscilloscope
VTVM (AC, DC)
AM Test Loop Antenna (AM Adjustment)
FM Dummy Antenna (FM Adjustment)
Stereo Signal Generator (RDS IN : EUROPE ONLY)
Frequency Counter
Distortion Analyser
TUNER ADJUSTMENT POINT
Modulation
frequency
30 %
MONO: 75 kHz DEV. (100 %)
STEREO: L=R (67.5 kHz), PILOT (7.5 kHz)
Item
Band
FM
1 kHz
Modulation
AM
400 Hz
All manuals and user guides at all-guides.com
Summary of Contents for SR4120
Page 4: ...2 2 WIRING DIAGRAM All manuals and user guides at all guides com...
Page 5: ...3 4 3 BLOCK DIAGRAM All manuals and user guides at all guides com...
Page 8: ...9 10 FRONT SCHEMATIC DIAGRAM All manuals and user guides at all guides com...
Page 10: ...13 14 TUNER SCHEMATIC DIAGRAM All manuals and user guides at all guides com...