Pioneer SCU 2556 ZRN, Service Manual

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35
SCU-2456ZRN,2556ZRN
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.
FM SSG Displayed Adjustment Adjustment Method
No.
Frequency(MHz)
Level(dBf)
Frequency(MHz)
Point (Switch Position)
TUN Volt
1 ••••• ••••• 108.0 L5 DC V Meter(1) : 6V
IF 2 98.1 M 60
—
100 98.1 T51 Center Meter : 0
ANT Coil
3 98.1 M 5 98.1 L2 mV Meter(1) : Maximum
RF Coil
4 98.1 M 5 98.1 L4 mV Meter(1) : Maximum
RF 5 129.3 M 60
—
80 107.9 TC1 mV Meter(1) : Minimum
Trimmer
6 RF Coil and RF Trimmer shall be adjusted twice or more
IFT 7 98.1 M 5 98.1 T31 mV Meter(1) : Maximum
(STEREO MODE)
ARC 8 98.1 S 40 98.1 VR154 mV Meter(1) : Separation 5dB
(STEREO MODE)
FMSL ADJUSTMENT
Modulation MONO MOD., 400Hz 100%(75kHz Dev.)
FM SSG Displayed Adjustment Adjustment Method
No.
Frequency(MHz)
Level(dBf)
Frequency(MHz)
Point (Switch Position)
FMSL 1 98.1 M 25 98.1 VR501 DC V Meter(2) : 1.25V
±
0.05V