7.3.2 Reproduce Level Adjustment
Perform the following adjustment at the speed most often used.
1. Thread the machine with the Reproduce Alignment Tape (refer to §7.1). Press
down the both Monitor buttons to TAPE position.
2. Connect the AC Voltmeter to the CH 1 OUTPUT connector.
3. Set the SRL switch to SRL position. Play the 1 kHz at Reference Level portion
of the Reproduce Alignment Tape.
4. Adjust VR106 (SRL LEVEL) on the REC/REP AMP PCB Assembly so that the
AC voltmeter indicates +4 dBu.
5. Connect the AC voltmeter to 2 channel OUTPUT connector and repeat Steps
3 and 4 for 2 channel using VR206.
7.3.3 Reproduce Equalization Adjustment
NOTE: In this section, the Reproduce EQ is adjusted. Low Frequency Compensation will
be covered in §7.4.6.
1. Set the SPEED LO/HI switch to the HI position.
2. Thread the 15 ips Reproduce Alignment tape. (For Low Version models,
thread 7.5 ips Alignment tape instead.)
3. Set the both RECORD READY buttons of the all channels to the SAFE
position. Press down the both Monitor buttons to TAPE position.
4. Connect the AC voltmeter to the CH1 Output connector.
5. Play the 10 kHz portion of the Reproduce Alignment tape and adjust VR102
for High Speed models (VR103 for Low Speed models) on the REC/REP AMP
PCB until the AC voltmeter indicates +4 dBu.
6. Connect the AC voltmeter to 2 channel OUTPUT connector and repeat Step 5
for 2channel by adjusting VR202 (VR203 for Low Speed models).
7. Set the SPEED LO/HI switch to the LO position.
8. Thread the machine with the 7.5 ips Reproduce Alignment tape. (3.75 ips tape
for Low Speed models) .
9. Connect the AC voltmeter to the CH 1 OUTPUT connector.
10. Play the 10 kHz portion of the Alignment tape and adjust VR103 for High
Speed models (VR104 for Low Speed models) until the AC voltmeter
indicates -6 dBu.
NOTE: 7.5 ips alignment tape equalization tones are recorded at 10 dB below the
reference level.
11. Connect the AC voltmeter to the channel 2 OUTPUT connector and repeat
Step 10 by adjusting VR203 for High Speed models. (For Low Speed models,
VR204).
MX-5050mkIV-2/BIII-2 Operation and Maintenance Manual
48 1999-02
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