Manual - Pioneer KEH-P7850 Service Manual

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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
3
ANT Coil
4
RF Coil
IFT 5
ARC 6
DOLBY B NR ADJUSTMENT
No. Test Tape
TE
1 NCT-150
L 13942296513
(400Hz,200nwb/m)
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FM SSG
Level(dBf)
••••• •••••
98.1 M 60 100
—
98.1 M 5
98.1 M 5
98.1 M 5
98.1 S 40
Adjustment Point
VR301(Lch),VR302(Rch)
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2 9
8
Displayed Adjustment
Point
Frequency(MHz)
108.0 L5
98.1 T51
98.1 L2
98.1 L4
98.1 T31
98.1 VR154
Q Q
3 6 7 1 3 1 5
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KEH-P7850
9 4 2 8
Adjustment Method
(Switch Position)
DC V Meter(1) : 6V
Center Meter : 0
mV Meter(1) : Maximum
mV Meter(1) : Maximum
mV Meter(1) : Maximum
(STEREO MODE)
mV Meter(1) : Separation 5dB
(STEREO MODE)
Adjustment Method
(Switch Position)
mV Meter(2) : –6dBs±1.0dB
0 5 8 2 9 9 4 2 8
(DOLBY NR Switch : OFF)
m
9 9
9 9
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