OTARI MX-50II Series User manual

Part No. OS3-322
R
MX-50II
PROFESSIONAL TAPE RECORDER
OPERATION AND MAINTENANCE MANUAL
FIFTH EDITION
Printed: June 1996
Ed 5 (GK)

Copyright © 1991, 1992, 1993, 1994, 1996 by Otari, Inc.
Printed in Japan
This manual may not be reproduced by any means without written permission.

WARNING
This equipment generates, uses and can radiate radio frequency energy
and if not installed and used in accordance with the instructions
manual, may cause interference to radio communications.
It has been tested and found to comply with the limits for a Class A
computing device pursuant to Subpart J of Part 15 of FCC Rules, which
are designed to provide reasonable protection against such interference
when operated in a commercial environment. Operation of this
equipment in a residential area is likely to cause interference in which
case the user at this own expense will be required to take whatever
measures may be required to correct the interference.

CAUTION
PLEASE READ THROUGH THE SAFETY INSTRUCTIONS ON THE NEXT PAGE.
To prevent fire or shock hazard:
Do not expose this unit to rain or moisture.
Do not remove panels (unless instructed to do so).
There are no user-serviceable parts inside.
Refer servicing to qualified service personnel.

SAFETY INSTRUCTIONS
1. Read Instructions All safety and operating instructions should be read before the device is
operated.
2. Retain Instructions The safety and operating instructions should be retained for future reference.
3. Heed Warnings All warnings on the device and in the operating instructions should be
complied with.
4. Follow Instructions All operating and use instructions should be followed.
5. Water and Moisture The device should not be used near water — for example, near a bathtub,
wash bowl, sink, laundry tub, in a wet basement, near a swimming pool, etc.
6. Carts and Stands The device should be used only with a cart or stand that is recommended by
the manufacturer.
7. Ventilation The device should be situated so that its location or position does not interfere
with its proper ventilation. For example, the device should not be situated on a
bed, sofa, rug, or similar surface that may block the ventilation openings; or,
placed in a built-in installation, such as a bookcase or cabinet that may impede
the flow of air through the ventilation openings.
8. Heat The device should be situated away from heat sources such as a radiator,
heat register, stove or other appliances (including amplifiers) that produce
heat.
9. Power Sources The device should be connected to a power supply only of the type described
in the operating instructions or as marked on the device.
10. Grounding or Polarization Precautions should be taken so that the grounding or polarization means of
the device is not defeated.
11. Power Cord Protection Power supply cords should be routed as they are not likely to be walked on
or pinched by items placed upon or against them, paying particular attention
to cords at plugs, convenience receptacles, and the point where they exit
from the device.
12. Cleaning The device should be cleaned only as recommended by the manufacturer.
13. Non-Use Periods The power cord of the device should be unplugged from the out-let when left
unused for a long period of time.
14 Object and Liquid Entry Care should be taken that objects do not enter and that liquids are not spilled
into the enclosure through openings.
15. Damage Requiring Service The device should be serviced by qualified service personnel when:
A. The power supply cord or the plug has been damaged; or
B. Objects have entered, or liquid has been spilled into the appliance; or
C. The appliance has been exposed to rain; or
D. The appliance does not appear to operate normally or exhibits marked
change in performance; or
E. The appliance has been dropped, or the enclosure damaged.
16. Servicing The user should not attempt to service the device beyond that described in
the operating instructions. All other service should be referred to qualified
personnel.

COMMUNICATION WITH OTARI
FOR SERVICE INFORMATION AND PARTS
All Otari products are manufactured under strict quality control. Each unit is carefully inspected and tested prior to
shipment.
If, however, some adjustment or technical support becomes necessary, replacement parts are required, or technical
questions arise, please contact your Otari dealer or contact Otari at:
Otari, Inc. Otari Corporation
4-33-3 Kokuryo-cho 378 Vintage Park Drive
Chofu-shi, Tokyo182 Foster City
Japan California 94404
U.S.A.
Phone : [phone] Phone : [phone]
Telex : J26604 OTRDENKI Telex : 650 302 8432 MCI UW
Fax : [phone] Fax : [phone]
Cable : OTARIDENKI TOKYO
Otari Deutschland GmbH. Otari Singapore Pte., Ltd
Rudolf-Diesel-Str.12 40 MacTaggart Road
D-40670 Meerbusch 2 (Osterath) Singapore 1336
F.R.Germany Phone : [phone]
Phone : [phone] Telex : RS 36935 OTARI
Telex : 8531638 OTEL D Fax : [phone]
Fax : [phone]
Another part of Otari's continuing technical support program for our products is the continuous revision of manuals as the
equipment is improved or modified. In order for you to receive the information and support which is applicable to your
equipment, and for the technical support program to function properly, please include the following information, most of
which can be obtained from the Serial number label on the machine, in all correspondence with Otari:
•Model Number:
•Serial Number:
•Date of Purchase:
•Name and address of the dealer where the machine was purchased and the power requirements (voltage and
frequency) of the machine.
January 1994

Table of Contents
Safety Instructions .......................................................... vi
Communication with Otari ................................................. vii
Section 1 Introduction
1.1 General ................................................................ 1-2
1.2 Using this Manual .................................................... 1-3
1.3 Specifications ........................................................ 1-4
1.3.1 Transport .......................................................... 1-4
1.3.2 Electronics ......................................................... 1-4
1.3.3 Physical ........................................................... 1-5
1.3.4 Accessories ........................................................ 1-6
Section 2 Installation
2.1 Unpacking and Inspection .......................................... 2-2
2.2 Connecting the MX-50II ............................................. 2-3
Section 3 Controls and Indicators
3.1 Transport Control Panel ............................................. 3-2
3.2 Connector Panel ...................................................... 3-8
Section 4 Operation
4.1 Modes of Operation .................................................. 4-2
4.2 Mounting the Reels and Threading the MX-50II ................. 4-3
4.2.1 Placing the Reels on the Machine ................................... 4-3
4.2.2 Threading the Tape ................................................. 4-4
4.3 Transport Modes ..................................................... 4-5
4.4 Audio Channel Modes ............................................... 4-6
4.5 Locator Modes ....................................................... 4-6
4.6 Vari Speed Mode ..................................................... 4-7
4.7 Voice Edit Mode ...................................................... 4-7
Section 5 Maintenance and Adjustment
5.1 Routine Maintenance ................................................ 5-2
5.1.1 Demagnetizing the Heads and Tape Path ............................ 5-2
5.1.2 Cleaning the Heads and Tape Path .................................. 5-3
5.1.3 Lubrication ......................................................... 5-3
5.2 Transport Alignment ................................................. 5-4
5.2.1 Head Position Adjustment .......................................... 5-4
5.2.2 Reel Table Height Adjustment ....................................... 5-5
viiiMay 1991

5.2.3 Reel Brake Adjustment ............................................. 5-5
5.2.4 Tape Lifter Adjustment ............................................. 5-6
5.2.5 Pinch Roller Adjustment ............................................ 5-6
5.2.6 Capstan Motor Servo Adjustment ................................... 5-7
5.3 Audio Channel Alignment ........................................... 5-8
5.3.1 Input/Output Level and Peak Indicator Level Adjustments ............ 5-9
5.3.2 Reproduce Electronics Adjustments ............................... 5-10
5.3.2.1 Reproduce Head Azimuth Adjustment ....................... 5-10
5.3.2.2 Reproduce Level Adjustment ............................... 5-11
5.3.2.3 Reproduce Equalization Adjustment ......................... 5-11
5.3.3 Record Electronics Adjustments ................................... 5-12
5.3.3.1 Record Bias Adjustment .................................... 5-12
5.3.3.2 Record Head Azimuth Adjustment .......................... 5-12
5.3.3.3 Record Level Adjustment ................................... 5-13
5.3.3.4 Record Equalization Adjustment ............................ 5-13
5.3.3.5 Low Frequency Reproduce Equalization Adjustment ......... 5-14
5.3.3.6 Bias Oscillator Transformer Dummy Load Adjustment ....... 5-14
Section 6 Printed Circuit Board Layouts and Parts Lists
6.1 Control PCB Assembly .............................................. 6-2
6.2 Audio Amplifier PCB Assembly .................................... 6-7
Section 7 Exploded View Drawings and Parts Lists
7.1 Case Assembly ......................................................... 7-2
7.2 Head Assembly ......................................................... 7-4
7.3 Reel Assembly ......................................................... 7-6
7.4 Transport Assembly (1) ................................................ 7-8
7.5 Transport Assembly (2) ............................................... 7-10
7.6 Transport Assembly (3) ............................................... 7-12
7.7 Amplifier and Connector Panel Assemblies .......................... 7-14
Appendix: Optional Accessory Installation Procedure
A: Rack Mount Kit (ZA-5EK) .............................................. AP-2
B: Pedestal (Stand) ....................................................... AP-3
C: Input and Output Transformers ........................................ AP-4
D: VEM (Voice Edit Mode) PCB Assembly ............................... AP-6
E: Low Speed Conversion ................................................. AP-7
Circuit Diagrams
Index
Table of Contents
May 1991ix
MX-50II Operation and Maintenance Manual

Section 1 Introduction
This section contains general information about the MX-50II two channel
analog tape recorder and about this manual.
1.1 General ................................................................ 1-2
1.2 Using this Manual .................................................... 1-3
1.3 Specifications ........................................................ 1-4
1.3.1 Transport .......................................................... 1-4
1.3.2 Electronics ......................................................... 1-4
1.3.3 Physical ........................................................... 1-5
1.3.4 Accessories ........................................................ 1-6
1 - 1May 1991

1.1 General
The Otari MX-50II series tape recorders are economical high-performance
1/4" tape recorder/reproducers utilizing the latest technology in analog tape
recording. The MX-50II series recorder/reproducers are comprised of two
machines in the following configurations.
Table 1-1
MX-50II Series Machine Configurations
_______________________________
Model Track Configuration
_______________________________
MX-50II-N NAB2track2 channel
MX-50II-D DINStereo
_______________________________
Main Features:
All machines in the series will accept any size reel from a 5" EIA reel to an
11.2" DIN reel. Different size reels can be used for supply and take-up.
The front panel pitch control provides ±8% variable speed range. The
capstan motor speed can also be controlled by an external source of 9600 Hz
(nominal) square waves for easy interface with a synchronizer or similar
controller. The speed range under external control is -50– +100%.
An optional VOICE EDIT MODE PCB assembly allows listening at twice
normal play speed without pitch shift for easy editing of lecture and interview
work or for transcription.
For convenience of tape editing work, the monitor speaker unit and
headphone connector with channel selector switches are equipped.
The built-in tape timer displays the current tape position as Hours, Minutes
and Seconds. The tape timer incorporates a search-to-cue locator with one
cue point memory and a zero location memory.
All machines in the series feature front panel selection of two operating
speeds, with internal switch selection of either high (15 ips and 7.5 ips) or low
(7.5 ips and 3.75 ips) speed pair operation.
The MX-50II series machines provide switch selection of NAB or IEC
equalization with front panel indication of equalization. XL type connectors
are provided for inputs and outputs.
Section 1 Introduction
May 19911 - 2
MX-50II Operation and Maintenance Manual

1.2 Using this Manual
This manual is intended for use with both MX-50II models. For convenience,
the descriptions and references apply to the MX-50II-N, where any
differences exist between this model and others in the series, those
differences will be fully explained in context.
◆ Organization: This manual is divided into nine sections beginning with
this Introduction which contains general information about the MX-50II
Series and about the manual.
Section 2, Installation, contains the information necessary when first
unpacking and installing the machine. The information and procedures
contained in this section should be followed very carefully when the machine
is first unpacked and installed.
Section 3, Controls and Indicators, contains a keyed reference guide to the
operating controls, indicators, and connectors on the machine. This section
contains detailed information about each control and its function. Refer to
this section when you have a question about the function of a particular
control, indicator, or connector.
Section 4, Operation, describes the operation of the MX-50 machines, and is
divided into two parts; a. A table of machine operating modes listing each
mode and the controls necessary to enter that mode; and b. Detailed
operating instructions, which describe each operation and the controls and
indicators associated with that operation.
Section 5, Maintenance and Alignment, provides the information necessary
to perform routine maintenance operations, including head cleaning and
demagnetizing and capstan motor lubrication. It also covers the audio and
transport adjustments associated with normal operation of the machine.
Section 6 Printed Circuit Board Layouts and Parts Lists, contains two-color
“x-ray” views of the printed circuit boards (PCBs) showing component
locations and foil traces. This section also contains Parts Lists of the
electronic components associated with each PCB.
Section 7 Exploded Views and Parts Lists, contains assembly drawings of
the machine “exploded” to show internal parts and hardware, and the order
of assembly. Each drawing is keyed to an accompanying Parts List
containing the Otari part number for each mechanical component.
Appendix contains the installation instruction for optional accessories.
The final section contains the Schematic Diagrams for electronics
assemblies and major printed circuit boards.
◆ Conventions within this Manual
This manual uses the following notation:
Buttons, Switches PLAY BUTTON or TAPE TIMER
Indicators, LED lamps READYINDICATOR
Modes PLAY or PLAY MODE
The six major transport control buttons are not labeled on the machine, but
are labeled on the button caps with graphic symbols. This manual uses the
name of the button rather than the graphic symbol whenever the buttons are
referred.
Button Symbol Name
PLAY
RECORD
STOP
FAST FORWARD (F.FWD)
REWIND
CUE
MX-50II Operation and Maintenance Manual
1 - 3May 1991
Section 1 Introduction

1.3 Specifications
1.3.1 Transport
Track Configuration 1/4" (6.3 mm), 2 track
Heads Erase x 1
Record x 1
Reproduce x 1
Motors Capstan x 1 Quartz PLL Servo Controlled Direct Drive Brushless DC Motor
Reel x 2 AC Induction Motor
Reel Size Max. 11.2" (DIN)
Tape Speeds High speed version 15 and 7.5 ips (38.1 and 19.05 cm/s)
Low speed version* 7.5 and 3.75 ips (19.05 and 9.5 cm/s) *manufactured to order
Tape Speed Accuracy Max. ±0.2%
Tape Speed Deviation Max. 0.2%
Vari Speed ±8%
VEM Tape Speed +100% with optional VEM accessory, at 7.5 ips and 3.75 ips only.
Wow and Flutter (Peak Weighted DIN 45507) 15 ips Max. ±0.06%
7.5 ips Max. ±0.08%
3.75 ips Max. ±0.12%
Start Time* 15 ips Max. 0.4 s *Time required to accelerate
7.5 ips Max. 0.3 s to double the specified Wow and Flutter value
3.75 ips Max. 0.25 s
Stop Time 15 ips Max. 0.5 s
7.5 ips Max. 0.4 s
3.75 ips Max 0.4 s
Fast Wind Time 60 Hz 100 s for 2,500 ft
50 Hz 120 s for 2,500 ft
1.3.2 Electronics
NOTE: All specifications are measured with AMPEX #456.
Line Input Mode Transformerless Active Balanced
Input Impedance 10 kΩ
Nominal Level +4 dBu (MX-50II-N)
+6 dBu (MX-50II-D)
Max. Level +30 dBu
Connector XL type
Line Output Mode Transformerless Single End
Output Impedance Min. 5 Ω
Nominal Level +4 dBu (MX-50II-N)
+6 dBu (MX-50II-D)
Max. Level +22 dBu
Connector XL type (Male)
Phone Output Load Impedance Min. 8 Ω
Connector 1/4" (6 mm) Stereo Phone Jack
Section 1 Introduction
May 19911 - 4
MX-50II Operation and Maintenance Manual

Equalization NAB/IEC switchable
Reference Fluxivity 250 nWb/m (185 – 510 nWb/m adjustable)
Frequency Response (Overall) 15 ips 30 Hz – 20 kHz ± 2 dB (SRL) [MX-50II-D SRL -20 dB]
MX-50II-N: SRL = 250 nWb/m 7.5 ips 30 Hz – 18 kHz ± 2 dB (SRL -10 dB) [MX-50II-D SRL -20 dB]
MX-50II-D: SRL = 510 nWb/m 3.75 ips 20 Hz – 10 kHz ± 2 dB (SRL -20 dB) [MX-50II-D SRL -20 dB]
Signal to Noise Ratio Unweighted with audio filter (30 Hz – 18 kHz)
NAB IEC Recording Level
MX-50II-N 15 ips Min. 69 dB Min. 70 dB 1040 nWb/m
7.5 ips Min. 71 dB Min. 67 dB 1040 nWb/m
3.75 ips Min. 64 dB Min. 67 dB 740 nWb/m
MX-50II-D 15 ips Min. 69 dB Min. 70 dB 1040 nWb/m
7.5 ips Min. 66 dB Min. 67 dB 1040 nWb/m
3.75 ips Min. 62 dB Min. 63 dB 740 nWb/m
Distortion (THD) Max. 0.3% (MX-50II-N: 1 kHz, 250 nWb/m, 15 ips, Rec/Rep)
Max. 0.7% (MX-50II-D: 1 kHz, 510 nWb/m, 15 ips, Rec/Rep)
Crosstalk Min. 55 dB (MX-50II-N: 1 kHz)
Min. 50 dB (MX-50II-D: 1 kHz)
Depth of Erasure Min. 75 dB (MX-50II-N: 1 kHz, 1040 nWb/m, 15 ips)
Min. 70 dB (MX-50II-D: 1 kHz, 1040 nWb/m, 15 ips)
Bias and Erase Frequency 150 kHz ±10 kHz
1.3.3 Physical
Power Requirements 100/117/220/240 Volts ±10% single phase AC, 50 or 60 Hz
Power Consumption 100 VA
Operating Environment 5°–40°C, 20–80% RH
Storage Environment -20°–45°C, 10–80% RH
Weight 25 kg (55 lbs)
Dimensions (W x D x H) 430 x 455 x 250mm (16.9" x 7.3" x 17.1")
430 186 28
450
MX-50II Operation and Maintenance Manual
1 - 5May 1991
Section 1 Introduction

1.3.4 Accessories
Standard Accessory NAB Hub Reel Hold Down Knob 2 pcs
Power Cable 1 pc
Fuse 2A 1 pc
Fuse 3A 1 pc
Fuse 4A 1 pc
Fuse 5A 1 pc
Time Lag Fuse 2 pcs 1 pc for MX-50II-N
Lubrication Oil 1 pc PZ9E003
Operation Manual 1 pc OS3-322
Optional Accessory Transport Remote Control Unit CB-127-S CB-127
Mono Head Kit KH-43X-S
Scissors SB-12X for MX-50II-D
Scissors (Reverse cut angle) SB-13D-S for MX-50II-D
10.5" NAB Reel ZA-51A
11.2" DIN Reel ZA-5EG
Rack Mount 19" Rack Adapter ZA-5EK
VEM Unit ZA-5EL
Pedestal (Stand) ZA-5ET
Input Transformer ZA-5EY
Output Transformer ZA-5EZ
Proximity Sensor SR-21F-S
Otari reserves the right to change specifications without notice or obligation.
Section 1 Introduction
January 19921 - 6
MX-50II Operation and Maintenance Manual

Section 2 Installation
This section contains the necessary information for unpacking, inspecting,
and installing the MX-50II, and includes procedures for customizing the MX-
50II.
2.1 Unpacking and Inspection .......................................... 2-2
2.2 Connecting the MX-50II ............................................. 2-3
2 - 1May 1991

2.1 Unpacking and Inspection
◆ Uncrating the Machine: We recommend that you open the carton
carefully and retain the packing materials at least until proper operation of the
machine has been established.
When sending the machine back to Otari or to your Otari dealer, follow the
packing instructions printed on the carton.
CAUTION: The MX-50II weighs approximately 25 kg (55 lb.). Although
uncrating and installation can be done by one person, it is recommended that
you do these procedures with another person.
The carton contains the following standard accessories:
Table 2-1
Standard Accessories
_________________________________________________________________
Item PartNo. Q'ty Notes
_________________________________________________________________
ReelClamper KW0HV 1set
PowerCord PZ9D003 1 forMX-50II-N
PowerCord PZ9D229 1 forMX-50II-D
TimeLag Fuse FH9-018 1
TimeLag Fuse 3.15A FH9-020 1 forMX-50II-D
Fuse 2A FH7F020 1 5 x 20 mm
Fuse 3A FH7F030 1 5 x 20 mm
Fuse 4A FH7F040 1 5x 20mm
Fuse 5A FH7F050 1 5 x 20 mm
LubricationOil PZ9E003 1 for capstan motor bearing
OperationManual OS3--322 1
M4x 6Screw ——— 4 for re-attachingbottom coverafter removingbottom feet
_________________________________________________________________
◆ Inspection: Before making any electrical connections, inspect the
machine visually. If there is any evidence of damage due to rough handling
during transportation, a claim should be filed with the transportation
company. Do not connect or operate the MX-50II until the inspection has
been completed, and any damage identified and corrected if necessary.
◆ Customizing your MX-50II: Some of the operating methods can be
changed according to your preferences.
1. Remove the rear cover by removing the four screws on the top of the
machine, the upper rear feet, and the two screws above the slanted
portion of the rear cover. Refer to Figure 2-1.
2. Loosen the two screws at the top of CONTROLPCBASSEMBLY and hinge it down
to horizontal.
3. Change the settings of the DIP switch on CONTROLPCBASSEMBLY if necessary.
Refer to Table 2-2.
REAR COVER
CONTROL
PCB ASSY
Figure 2-1
Opening the Transport Rear Cover
Section 2 Installation
June 19962 - 2
MX-50II Operation and Maintenance Manual

Table 2-2
DIP Switch Functions
________________________________________________________________
Switch Function Factory Setting
________________________________________________________________
SW1-1 PunchIn (Howto enterRECORD mode) off
ON PressRECORD whenin PLAY MODE.
off WhileHolding RECORDdown, pressPLAY.
SW1-2 PunchOut (Howto leaveRECORD without stoppingthe transport) off
ON PressPLAY.
off Whileholding RECORDdown, pressSTOP.
SW1-3 SpeedPair Selection off
ON Low Speed Pair = 7.5 and 3.75 ips.
off HighSpeed Pair= 15and 7.5ips.
SW1-4 VariSpeedDuring Recordmode. ON
ON EXT andVARI SPEED MODES cannotbe enteredduring RECORD MODE.
off EXT andVARI SPEED MODES canbe enteredwhile inRECORD MODE.
SW2 FaderControl LogicLevel Selection(MX-50II-D Only) M
MMake(Normally open) contact closure, or logic level active low.
BBrake(Normally closed) contact closure, or logic level active high.
________________________________________________________________
NOTE: Turn off the power to the MX-50II whenever changing the setting of
SW1 or SW2. The change of setting does not take effect until the power is
turned back on.
Please refer to Appendix for more information about operating the MX-50II at
3.75 ips.
2.2 Connecting the MX-50II
◆ Power Connection: Insure that the voltage and frequency supplied to the
machine agree with the machine's power requirement printed on the label on
the connector panel or on the carton. Make sure that the MX-50II POWER
switch is turned off then connect the supplied power cord from the AC mains
to the machine.
◆ Connecting the Audio Signal: The audio inputs to the MX-50II are
balanced. The outputs are unbalanced.
INPUTCONNECTORS of the MX-50II-N are wired as follows:
Pin 1 = Shield (GND), Pin 2 = Cold, Pin 3 = Hot.
OUTPUTCONNECTORS of the MX-50II-N are wired as follows:
Pin 1 = GND, Pin 2 = GND, Pin 3 = Hot.
INPUTCONNECTORS of the MX-50II-D are wired as follows:
Pin 1 = Shield (GND), Pin 2 = Hot, Pin 3 = Cold.
OUTPUTCONNECTORS of the MX-50II-D are wired as follows:
Pin 1 = GND, Pin 2 = Hot, Pin 3 = GND.
AC
HOT AC
NEUTRAL
GND
Figure 2-2
Power Connector Pin Assignment
UNBALANCED OUTPUT
BALANCED INPUT
21 GND
3
HOT
COLD
2
1
3
HOT
GND
3
1
2
2
3
1
Figure 2-3
Audio Connector Wiring (MX-50II-N)
MX-50II Operation and Maintenance Manual
2 - 3May 1991
Section 2 Installation

◆ Connector Pin Assignments
Table 2-3
REMOTE Connector Pin Assignment
_______________________________ ________________________________
No. Description Level I/O No. Description Level I/O
_______________________________ ________________________________
1. RECORDSwitch Low In 20. CapstanSpdControl Clock(*2) — In
2. PLAY Switch Low In 21. TapeSpeed A(*3) H/L Out
3. STOPSwitch Low In 22. TapeSpeed B(*3) H/L Out
4. F.FWDSwitch Low In 23. ExternalPitch Control Enable Low In
5. REWINDSwitch Low In 24. NC — —
6. LifterSwitch Low In 25. NC — —
7. NC — — 26. NC — —
8. NC — — 27. NC — —
9. SafetySwitch Shutoff Low Out 28. NC — —
10. RecordMode Tally Low Out 29. NC — —
11. PlayMode Tally Low Out 30. NC — —
12. StopMode Tally Low Out 31. NC — —
13. F.FWDMode Tally Low Out 32. NC — —
14. REWINDTally Low Out 33. +5V±10%Reg. PowerSupply (max150 mA)
15. NC — — 34. 24–40VUnreg. PowerSupply (max500 mA)
16. SignalGround 35. 24–40V Unreg.Power Supply(max 500mA)
17. Tach. Pulse(*1, 9) Out 36. PowerGround
18. Tape Direction(Fwd=Low) H/L Out 37. Power Ground
19. NC — —
_______________________________ ________________________________
NOTES: 1 Tach PulseRate (pulse/s) 3.75ips = 30, 7.5 ips = 60, 15 ips = 120
2 CapstanControl Freq. 9.6 kHz = nominal tape speed.
Acceptableexternal frequency range = 4.8–19.2 kHz
3 Tape SpeedDefinition 3.75ips Speed A= Low, Speed B = Low
7.5ips SpeedA =Low, SpeedB = High
15ips SpeedA= High, SpeedB =Low
4 ConnectorType D-sub 37 pin (female)
5 OutputSignals OutputType= OpenCollector
VOL =0–0.5 V, IOL =20 mA (max), VIL =TTL Level
LeakageCurrent = 20 µ A
PullUp =10 kΩ(terminated to +5 V)
VOH (HighLevel) =+30 V(max)
6 InputSignals Fan-in = 1.5
VIL =0–0.5 V(2.4 mA), VIH =2.5–5.25 V(60 µA)
7 CableLength: max10 m(32 feet)
8 InputCommand Pulse: 100 ms(min)
9 Tach Pulse: 50µ s(min)
10Capstan ClockDuty Cycle: 40–60%
Table 2-4
FADER Connector Pin Assignment (Only MX-50II-D models)
____________________________
No. Description I/O
____________________________
1. FaderPlay Switch In
3. ReproContact* Out
6. SignalGround —
8. ReproContact* Out
9. FrameGround —
____________________________
NOTE: To enterPLAY,connect pin1 topin 6. Pins3 and8 areclosed whenin REPRO MODE.
Section 2 Installation
May 19912 - 4
MX-50II Operation and Maintenance Manual