— 6 —
ELECTRICAL ADJUSTMENTS
STEP
1
2
3
4
5
6
7
7’
RDS
GENERATOR
FREQUENCY
Non-Mod.
Non-Mod.
98.1MHz
1kHz, 22.5kHz dev.
SG att: 66dB
µ
(1mV)
98.1MHz
1kHz, 22.5kHz dev.
SG att: 6dB
µ
98.1MHz
SG att: 6dB
µ
87.5MHz
107.9 (108) MHz
SG att: 6dB
µ
98.1MHz
SG att: 25dB
µ
98.1MHz
1kHz, 22.5kHz dev.
SG att: 33dB
µ
RADIO DIAL
SETTING
87.5MHz
107.9MHz
108MHz
98.1MHz
98.1MHz
88.5MHz
87.5MHz
107.9 (108.0)
MHz
98.1MHz
TEST MODE
98.1MHz
TEST MODE
OUTPUT
INDICATOR
DC VTVM to test
point
VT
DC VTVM to test
point
VT
AC VTVM to test
point*
AC VTVM across
speaker or 4 ohms
load
AC VTVM across
speaker or 4 ohms
load
AC VTVM across
speaker or 4 ohms
load
Adjust so that the
“ST” mark of LCD
Display appears
Adjust like to appear
for 0.95 of LCD
Display
ADJUST-
MENT
—
L103
FM OSC
L110
FM DET
L107
FM MIX
L100
FM ANT
L102
FM RF
L100
FM ANT
L102
FM RF
R129
FM SD
R204
REMARKS
Check the voltage more than 1.1V
Adjust for 6.9
앐
0.1V
NULL VOLTAGE to become -20
앐
20mV
Adjust for Maximum Level.
Adjust for Maximum LeveL.
Check for SPEC.
Sensitivity of the seeking
frequency.
Sensitivity of the S meter.
SETTING UP TEST MODE AT STEP 7 - SEE PAGE 7
ALIGNMENT OF FM MULTIPLEX SECTION
FM signal generator should be modulated by FM stereo sig-
nal generator.
Modulation level:
19kHz 10% (7.5kHz dev)
1000Hz 30% (22.5kHz dev)
FM signal generator output level:
66dB
µ
(1mV)
Frequency:
98.1 MHz.
Set the radio for FM reception and tune to signal. Adjust vol-
ume control to provide 0.5 watt on AC VTVM and tone to
center. Set L/R balance control for equal output at each chan-
nel.
STEP
1
2
3
MODULATION
FREQUENCY
19kHz & 1000Hz
(Left Channel)
SG att:66dB
µ
19kHz & 1000Hz
(Right Channel)
19kHz & 1000Hz
(Left Channel)
SG att:47dB
µ
OUTPUT INDICATOR
AC VTVM across Right speaker or
Right channel load
AC VTVM through Left speaker or
Left channel load
AC VTVM across Right speaker or
Right channel load
ADJUST-
MENT
R137
R137
R156
REMARKS
Adjust for minimum.
Check for minimum.
Adjust for 20dB Separation.
