Marantz PMD351 N1B Service Manual page 10

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4.4 MPX FILTER ADJUSTMENT
1) Put the unit in REC mode with a S.R.L. input.
2) The MPX fi lter switch ON and change the input
frequency to 19kHz(±10Hz).
3) Adjust L601(L), L602(R) for minimum output at the LINE
OUTPUT jacks.
4.5 RECORDING BIAS FREQUENCY AND HX COIL
ADJUSTMENT
1) Put the unit in REC mode.
2) Adjust the following bias oscillator coil for 105kHz at the
bias frequency.
TEST POINT ADJ. POINT
Remark:
May have to connect FREQUENCY COUNTER through an
AUDIO VOLT METER.
3) Next, connect the Oscilloscope to the HX test point
(T901, T902).
4) Adjust the HX coils for minimum level.
4.6 LEVEL METER SENSITIVITY CHECK
1) Put the unit in REC mode with a 1kHz, 100mV signal to
the LINE INPUT jacks.
2) Set the REC LEVEL at the test point T601, T602 as
300mV.
3) Check the VU LEVEL METER indicates 0dB.
Remark:
Dolby switch has to be OFF.
8
CH ADJ. POINT
L L601
R L602
R901 LL01
CH TEST POINT COIL
L T901 L901
R T902 L902
ADJ. TO
Minimum
ADJ. TO
105kHz
ADJ. TO
Minimum