Onkyo TX-7530 - FM Section Adjustments; FM Reception Adjustment; IF Stage Adjustment; Stereo Indicator Level Adjustment

FM section
Stereo modu-
lator output
Connection
of instrument PME SGeoni pat
Turning
dial setting
99.1MHz
1kHz, 75kHz devi.
65dBf (60dB)
21 Mne L+R:1kHz
17.2dBf (12dB) F
Ext. modulation BEAR HE devi.
99.1MHz
16.2dBf (11dB)
Ext. modulation
Stereo
indicator level Pilot signal
19kHz
7.5kHz devi.
99.1MHz
1kHz, 75kHz devi.
65dBf (60dB)
99.1MHz
99.1MHz
99.1MHz
Output indicator
DC voltmeter
Adjustment
OV + 20mV
AC voltmeter
IF on the
Maximum
front end
Adjust for
Remarks
Mode switch: MONO
Repeat the steps 1
and 3 until no
Distortion analyzer
L102 Minimum
Stereo indicator
Frequency counter
Light off
further adjustment
is necessary
Mode switch:
STEREO
19kHz + 10Hz
99.1MHz
65dBf (60dB)
Ext. modulation
Stereo
Distortion
Lor Reh. 1kHz
99.1MHz
Sepaiation 65dBf (60dB)
Ext. modulation
99.1MHz
35.2dBf (30dB)
1kHz, 75kHz devi.
Tuned
frequency
Output
indicator
Adjustment
point
OSC on
RF block
Digital DC
voltmeter
§22kHz
1.3V+0.1V
99.1MHz
99.1MHz
603kHz
400Hz 30% mod.
60dB/m
RF on
RF block
AC
voltmeter
603kHz
999kHz
400Hz 30% mod.
60dB/m
AC
voltmeter
999kHz
First signal
indicator
Same as above
R151
OUTPUT
60cm
Att
SIGNAL
GENERATOR
ac
VOLTMETER
AM
Loop
ANT
DIGITAL
pc
VOLTMETER
—15—
ONKY-0029qQ/ Druck1
Maximum
=
Distortion analyzer
Rch. AC voltmeter
Lch. AC voltmeter
Hi-blend indicator
IF on the
Minimum
front end
Minimum
Don’t turn more
than +180:
Maximum and
same separation
Light off
Reference specifications
FM Tuned voltage
Auto stop level
AM Tuned voltage
87.5MHz 2.0+0.5V
108.0MHz 7.7 +0.5V
AM: Less than 66dB/m
FM: Less than 17dBy
§22kHz 1.3+0.5V
1611kHz 8.0+0.5V
TX-7530
ANT
seated
TERMINAL
ERMINA
FM
SIGNAL
|
3
UNIT
eee
GENERATOR
TP-1
f
TP-2
AC
Dc
vo
MILLIVOLT
LTMETER
METER
Fig.
|
ANT
TERMINAL
TP-4
FM
SIGNAL
GENERATOR
| 3 FREQUENCY
COUNTER
io
Use the high impedance probe. (10:1)
Fig. 2
EXT.
MODE
OUTPUT
az
L
STEREO
FM
{
SIGNAL
MODULATOR
GENERATOR
ANT
TERMINAL
ac
VOLTMETER
Fig. 3 OSCILLOSCOPE
LIS2
22 @ rio
TPITP2 RIS! )rioz
FM/AM tuner and
selector switch pc
board