Marantz SD4000 - Tape Speed Adjustment Procedure

6.2 TAPE SPEED ADJUSTMENT
SET UP
1.
4.
Power voltage:- 50 or 60 Hz AC voltage rated for
the unit to be used in a market country.
2. Output terminal:- LINE OUTPUT (or DIN).
3.
Test tape used:- MTT-111 (3 kHz Tone) at 1-7/8
IPS (4.75 cm/sec).
MTT-111SP at 3-3/4 IPS (9.5 cm/
sec).
Unit position:- Vertical.
PROCEDURES
1.
TONE: 3 kHz
For 1-7/8 ips (4.75 cm/sec), play the mid portion
of the test tape MTT-111 back. Adjust the tape
speed adjusting variable resistor inside the motor for
2990 to 3010 Hz counter indication.
. For 3-3/4 ips (9.5 cm/sec), play the mid portion of
the test tape MTT-111SP back. Adjust R310 for
2990 to 3010 Hz counter indication.
FREQUENCY
COUNTER
SPEED DOWN
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CAUTIONS
1.
2.
3.
For adjustment, the tape deck should be set up in
the normal operating condition.
Do not adjust the variable resistor more turns than
needed.
Do not proceed with adjustment after the tape deck
temperature has changed.
. If a strong shock or similar vibration is applied to
the tape deck after adjustment, make certain that
the measured tape speed had not changed.
. If the tape speed deviation occurs, perform the
adjustment again.
. Be careful that the counter may indicate a wrong
value because of too low counter input level.
. Before adjustment, allow for 30 seconds or more
after depressing of the PLAY pushbutton.
NOTE: Be sure to carry out the 1-7/8 ips (4.75 cm/
sec) tape speed adjustment for first.