Pioneer keh-p4900 Service Manual page 41

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FM ADJUSTMENT (UC MODEL)
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
FM ADJUSTMENT (ES MODEL)
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L 13942296513
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
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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
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
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2 9
8
Displayed Adjustment
Point
Frequency(MHz)
107.9 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
Displayed Adjustment
Point
Frequency(MHz)
108.0 L5
98.1 T51
98.1 L2
98.1 L4
98.1 T31
98.1 VR154
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KEH-P490,P4900,P4950
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)
0 5 8 2 9 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)
m
9 9
9 9
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