[9] CLR Button Pressing CLR together with the one of the following keys works as follows.
CLR + SET: Exits Set mode
CLR + TIME·IPS·%: Tape Timer Display resets to zero
CLR + SEARCH 1-3: Clears Cue Point Memory
CLR + REPEAT: Exits Repeat mode
[10] Speed Mode Select Button This button selects the tape speed for Record and Play modes. Pressing this button
changes the Speed mode as follows.
FIX mode: The Capstan Motor speed is controlled by the internal crystal oscillator. The
speed setting (HI or LO) is selected by the Speed Select button.
VARI mode: Tape speed is changed by ±20% of the nominal tape speed with the Pitch
Control knob.
EXT mode: Tape Speed is controlled by the external speed reference signal conveyed
through the PARALLEL/O connector. When using a synchronizer or resolver, set the
machine to this mode.
NOTE: When the Speed Mode switch is set to the EXT position, the Tape Time display
always shows tape time.
[11] Speed Mode Indicator These indicators illuminate to show the speed mode selected with the Speed Mode Select
Button.
[12] Pitch Control Knob When the Speed Control mode is set to the VARI mode, the Pitch Control knob changes
the tape speed in Record and Play modes. The tape speed is variable over a range of ±
20% of the selected FIX speed in 0.01 % steps.
[13] Tape Speed Select Button (HI/LO) This button selects the speed setting of the machine. The following combinations are
available. The speed version is set with SW1 on the CONTROL PCB.
Machine Type HI LO
Hi Version Machine 15ips 7.5 ips
Low Version Machine 7.5ips 3.75 ips
[14] Reel Size Change Switch This switch sets the reel tension corresponding to the selected reel size. When using a
10.5" NAB Reel, set this switch to the “L” position. When using a reel smaller than 10.5",
set the switch to the “S” position.
[15] CUE Button Pressing this button during Fast Wind modes initiates Cue mode, in which the tape lifters
retract allowing the tape to be in contact with the Reproduce head for audio monitoring at
fast wind speed. There are two ways to enter Cue mode: tapping CUE or holding CUE
down. For details, refer to §4.2.1.
[16] EDIT Button Pressing this button while in Stop mode causes the MX-5050 to enter Edit Ready mode, in
which the take-up motor is turned off and the safety switch for the Take-up tension Arm is
deactivated. Pressing PLAY in Edit Ready mode, or pressing EDIT in Play mode, causes
the MX-5050 to enter Dump Edit mode, in which the Take-up reel does not rotate causing
tape to be “dumped” from the transport.
[17] RECORD Button When any channel is in Record Ready mode, pressing RECORD and PLAY simultaneously
enters Record mode. Unless the READY/SAFE switch is placed at the READY position,
actual recording will not take place. For Punch In/Out Operation, refer to §4.4.2.
[18] PLAY Button Pressing PLAY when the transport is in Stop mode enters the tape into Play mode, in which
the tape is reproduced at the currently selected tape speed. Pressing PLAY with RECORD
enters the transport into Record mode.
[19] STOP Button Pressing STOP when the transport is in Record, Play, Dump Edit, Fast Forward or Rewind
mode causes the tape motion to stop.
[20] RWD Button Pressing RWD places the transport into Rewind mode, in which the tape moves from the
Take-up reel to the Supply reel at Fast Wind speed.
[21] F.FWD Button Pressing F.FWD places the transport into Fast Forward mode, in which the tape moves
from the Supply reel to the Take-up reel at Fast Wind speed.
MX-5050mkIV-2/BIII-2 Operation and Maintenance Manual
1999-02 15
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