Alpine 7516M - FM Section Specific Adjustments

7516M/7516MM
(7516L.
(3)
FM Stereo Modulator
FM Signal Generator
Control Settings
Power Switch
Fader Control
Balance Control
Treble / Bass Contro
Band Switch
Others
(4) Adjustment Procedures
FM Dummy
Antenna
Antenna
Receptacle
Y
ON
Front
Mechanical Center
Mechanical Center
FM
Unit Under Test
AC VTVM
Figure 12
Adjustment
T2101 for 0+30mvV.
Adjust VR201 (VOLUME) to obtain 2V
output This value is OdB.
Adjust VR2102 to 35+5dB output at
SG level minimum.
Adjust VR2101 to obtain 27+5dB at
T.P.3 output.
Step Description |Connection| Signal Generator {Dial Control] Test Point
IF : 98.1MHz, 66dB T.P.1
' | adjustment PIQUE 8 (Mod. OFF) SOME: |) “apo
98.1MHz, 66dB Speaker
(1)| Figure 9 (Mod. 400Hz, 98.1MHz | Output
Noise Level Dev. 22.5kHz)
2 Adjustment 98.1MHz, - 13dB Speaker
(2)| Figure 9 (Mod. 400Hz, 98.1MHz | Output
Dev. 22.5kHz)
Seek Stop 98.1MHz, 21dB
3 | Adjustment Figure 10 (Mod. 400Hz, 98.1MHz T.P.3
Dev. 22.5kHz)
98.1MHz
& VCO 7 66dB ‘
Adjustment Igarest (Mod. 400Hz, ene | CTS
Dev. 22.5kHz)
Stereo 98.1MHz
5 Separation if ; 66dB Z Speaker
Adjustment eres) (Stereo Mod, pone Output
(Leh) Lch, only)
Adjust VRO52 to read 19+0.05KHz on
Counter at T.P.4.
Adjust VRO53 for Rch. Output to be
minimum and confirm Lch, and Rch.
Output level difference is more than
25dB.