Fm Adjustment; Fmsl Adjustment - Pioneer SCU-2456ZRN Service Manual

FM ADJUSTMENT

Modulation M:MONO MOD., 400Hz 30%(22.5kHz Dev.) or 400Hz 100%(75kHz Dev.)
S:STEREO MOD., 1kHz, L or R=30%(20.25kHz+7.5kHz Dev.)
NOTE:Before proceeding to further adjustments after switching power ON, let the tuner run for ten minutes to allow
the circuits to stabilize.
No.
Frequency(MHz)
1 •••••
TUN Volt
IF 2 98.1 M
3 98.1 M
ANT Coil
4 98.1 M
RF Coil
RF 5 129.3 M
Trimmer
6 RF Coil and RF Trimmer shall be adjusted twice or more
IFT 7 98.1 M
ARC 8 98.1 S

FMSL ADJUSTMENT

Modulation MONO MOD., 400Hz 100%(75kHz Dev.)
No.
Frequency(MHz)
FMSL 1 98.1 M
FM SSG Displayed
Level(dBf)
Frequency(MHz)
•••••
60 100
—
5
5
60 80
—
5
40
FM SSG Displayed
Level(dBf)
Frequency(MHz)
25
Adjustment
Point
108.0 L5
98.1 T51
98.1 L2
98.1 L4
107.9 TC1
98.1 T31
98.1 VR154
Adjustment
Point
98.1 VR501
SCU-2456ZRN,2556ZRN
Adjustment Method
(Switch Position)
DC V Meter(1) : 6V
Center Meter : 0
mV Meter(1) : Maximum
mV Meter(1) : Maximum
mV Meter(1) : Minimum
mV Meter(1) : Maximum
(STEREO MODE)
mV Meter(1) : Separation 5dB
(STEREO MODE)
Adjustment Method
(Switch Position)
DC V Meter(2) : 1.25V±0.05V
35