Marantz PMD351 N1B Service Manual page 9

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4.1 TAPE SPEED ADJUSTMENT
1) Playback the middle part of the Wow & Flutter test tape.
2) Adjust the variable resistor.
ADJUSTMENT POINT
RM36
for 3000Hz (2990Hz - 3010Hz).
3) Repeat 1) and 2) for both directions.
4.2 HEAD AZIMUTH ADJUSTMENT and
FREQUENCY RESPONSE CHECK
1) Playback the 12.5 kHz part of the Azimuth test tape.
2) Adjust the proper azimuth screw in both directions for
maximum output at the LINE OUTPUT jacks.
3) In case the L/R peak points are different, adjust the
lower channel to the maximum.
4) Lock azimuth screws with glue.
5) Playback the 315 Hz part of the test tape and set a 0 dB
ref., then playback the 12.5 kHz part of the test tape and
confi rm that the output is 0 dB, ±3 dB.
4.3 PLAYBACK LEVEL ADJUSTMENT
1) Playback the DOLBY test tape, adjust the following
variable resistors to the values and the test points
indicated below:
CH TEST POINT
L T601
R T602
2) After adjustment, replay and check it again.
Remark:
In case of drifting output during replay, check that the tape
running and the test tape are ok, because they may be
defective.
7
ADJ. ADJUSTMENT
RES. VALUE
RJ15
300mV
RJ16