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Sanyo FXD-770GD Service Manual page 8

Full panel detachable high power fm/am stereo receiver compact disc player
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GENERATOR
STEP
FREQUENCY
1
Non-Mod.
2
Non-Mod.
3
98.1MHz
1kHz, 22.5kHz dev.
SG att: 66dBµ(1mV)
4
98.1MHz
1kHz, 22.5kHz dev.
SG att: 6dBµ
5
98.1MHz
SG att: 6dBµ
6
87.5MHz
107.9 (108) MHz
SG att: 6dBµ
7
98.1MHz
SG att: 25dBµ
7'
98.1MHz
RDS
1kHz, 22.5kHz dev.
SG att: 33dBµ
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:
Frequency:
98.1 MHz.
MODULATION
STEP
FREQUENCY
1
19kHz & 1000Hz
(Left Channel)
SG att:66dBµ
2
19kHz & 1000Hz
(Right Channel)
3
19kHz & 1000Hz
(Left Channel)
SG att:47dBµ
ELECTRICAL ADJUSTMENTS
RADIO DIAL
OUTPUT
SETTING
INDICATOR
87.5MHz
DC VTVM to test
point
107.9MHz
DC VTVM to test
108MHz
point
98.1MHz
AC VTVM to test
point*
98.1MHz
AC VTVM across
speaker or 4 ohms
load
88.5MHz
AC VTVM across
speaker or 4 ohms
load
87.5MHz
AC VTVM across
107.9 (108.0)
speaker or 4 ohms
MHz
load
98.1MHz
Adjust so that the
TEST MODE
"ST" mark of LCD
Display appears
98.1MHz
Adjust like to appear
TEST MODE
for 0.95 of LCD
Display
66dBµ (1mV)
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
VT
L103
FM OSC
VT
L110
FM DET
L107
FM MIX
L100
FM ANT
L102
FM RF
L100
FM ANT
L102
FM RF
R129
FM SD
R204
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.
ADJUST-
MENT
R137
R137
R156
— 6 —
REMARKS
Check the voltage more than 1.1V
Adjust for 6.9
0.1V
NULL VOLTAGE to become -20
20mV
Adjust for Maximum Level.
Adjust for Maximum LeveL.
Check for SPEC.
Sensitivity of the seeking
frequency.
Sensitivity of the S meter.
REMARKS
Adjust for minimum.
Check for minimum.
Adjust for 20dB Separation.

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