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OTARI MX-5050MKIII-2 Operation Manual

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Parts No. OS3-042
MX-5050MKIII-2
PROFESSIONAL RECORDER
OPERATION MANUAL
Richard L. Hess
Audio Tape Restoration
I-877-TA PE-FIX
(Toll Free U S. S Canada)
(905) 713-6733 (V)
14845-6 Yonge Street
(905) 751-1984 (F)
Suite 124
http://www.richardhess.com/tape/
Aurora, ON L4G 6H8
richard@richardhess.com
CANADA
Edition No. 3
Printed : Feb. 1986

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  • Page 1 Parts No. OS3-042 MX-5050MKIII-2 PROFESSIONAL RECORDER OPERATION MANUAL Richard L. Hess Audio Tape Restoration I-877-TA PE-FIX (Toll Free U S. S Canada) (905) 713-6733 (V) 14845-6 Yonge Street (905) 751-1984 (F) Suite 124 http://www.richardhess.com/tape/ Aurora, ON L4G 6H8 richard@richardhess.com CANADA Edition No.
  • Page 2 CAUTION To prevent fire or shock hazard : Do not expose this appliance to rain or moisture. Do not remove cover. No user-serviceable parts inside. Refer servicing to qualified service personnel. PLEASE READ THROUGH SAFETY INSTRUCTIONS ON THE NEXT PAGE.

  • Page 3: Safety Instructions

    SAFETY INSTRUCTIONS Read Instructions — All the safety and operating instruc­ tions should be read before the appliance is operated. Retain Instructions — The safety and operating instructions should be retained for future reference. Heed Warnings — All warnings on the appliance and in the operating instructions should be adhered to.
  • Page 4 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 ratio communications. It has been tested and found to comply with the limits for a Class A computing device pursuant to Subpart J of Part Rules, which are de­...
  • Page 5 COMMUNICATION WITH OTARI FOR SERVICE INFORMATION AND PARTS The OTARI PRODUCTS are manufactured under strict quality control and each unit is carefully tested and inspected prior to shipment from our factory. If, however, some adjustments or technical support become neces­...

  • Page 6: Table Of Contents

    TABLE O F CONTENTS TOPIC PAGE SECTION GENERAL INFORMATION System Description Tape Transport 1.1.1 Record/Reproduce Electronics 1.1.2 Head Assemblies 1.1.3 Standard Accessories Optional Accessories Service and Replacement Parts Specifications INSTALLATION Unpacking and Inspection Cable Connection Location and Environment Dimensions Standard Switch Position on Shipment Power and Signal Connections 2.6.1 AC Power Connections...

  • Page 7: General Information

    SECTION I. GENERAL INFORMATION The MX-5050 MK HI-2 Recorder is a professional quality two-speed audio tape recorder/reproducer, designed for optimum performance and long life. It accommodates a 1/4 inch tape, 7-1/2 ips (19.05 cm/sec) and 15 ips (38.1 cm/sec) tape speeds. SYSTEM DESCRIPTION Among the many professional features of the MX5050MKHI-2 are: selective reproduction, motion sensing, an edit control that...

  • Page 8: Record/Reproduce Electronics

    1.1.2 RECORD/REPRODUCE ELECTRONICS FEATURES The RECORD/REPRODUCE amplifier unit is connected to the transport unit only by the connectors and therefore can be easily removed for ease in servicing. This machine contains a SEL. REP. function for overdubbing: for example, SOUND WITH SOUND, SOUND ON SOUND, carried out by the PUNCH-IN and PUNCH-OUT functions of the transport control.

  • Page 9: Optional Accessories

    Hold Down Knob (for EIA hub) ZA-52Y SERVICE AND REPLACEMENT PARTS For service and replacement parts, or for technical support, please contact your nearest service center, OTARI dealer, or write directly to OTARI. (See page iii for complete addresses.) SPECIFICATIONS...
  • Page 10 Level: +4 dBm or -10 dBm, rear panel Outputs: Line switch selectable. Active balanced (Floating type), Source impedance: 5 ohms. Load impedance: More than 600 ohms. Maximum line output: +27 dBm with a 600 ohm load. Level: -24 dBm with an 8 ohm load. Headphone Load impedance: 8 ohms or greater.
  • Page 11 Using a 30 to 18 kHz RC filter to atten­ uate noise outside the audio spectrum. Weighted Using an NAB or ASA "A" weighting filter and a 1 kHz reference. Otari reserves the right to change specifications without notice and/or obligation.

  • Page 12: Installation

    Referring to the lists in Secs. 1.2 and 1.3 (as applicable), veri­ fy that all items have been received. Report any shortage or damage to the carrier and your local Otari dealer. Save the packing case for possible reshipment. Other packaging may cause damage during transportation and will void the warranty.

  • Page 13: Standard Switch Position On Shipment

    STANDARD SWITCH POSITION ON SHIPMENT Either the NAB standard or the IEC standard of equalization, recording level, etc. may be used with the Otari MX-5050 MKHI-2. These units have been provided with a slide switch on the back panel which selects one of these two standards; to change stand­...

  • Page 14: Ac Power Connections

    Index Name Function Remote control connector for use REMOTE CONTROL Connector with the optional remote control unit to control the record, play, stop, rewind, and fast forward mod e s . Male XLR-type connector. LINE OUTPUT Connector Active balanced output (Floating type).
  • Page 15 For more detail information of ex­ ternal sync, operation. Please contact to OTARI dealer. Microphone Used to adjust the sensitivity of ATTENUATOR Switch the microphone amplifier in ac­ cordance with the microphone's input level. Minimum Input (Sensitivity) 0 dB -70 dBm...
  • Page 16 Connect the cable shield to pin 1. For unbalanced inputs using two-conductor shielded cable, wire the male XLR-connector as follows: Connect the signal leads of a cable to pin 3 (high) and pin 2 (low) of the connector. Connect the cable shield to pin 1 of the connector. Connect a jumper from pin 1 to pin 2 of the connector.

  • Page 17: Operation

    SECTION III. OPERATION This section of the manual provides a description of all operating controls and indicators and their use in the system, and step-by- step procedures for the various modes of operation. CONTROLS AND INDICATORS Table 3-1 Tape Transport Controls and Indicators Located inside the head cover is a switch for se­...
  • Page 18 (Continued) Pressing the PLAY pushbutton during the fast forward or rewind modes stops the tape, then automatically starts the play mode. RECORD Pushbutton Used in conjunction with the PLAY Switch pushbutton switch and the RECORD channel selector. With the desired channel pushbutton switches depress­...
  • Page 19 Reproduce Head Used to select the appropriate re­ Selector Switch produce head stack to conform to the type of tape to be reproduced. NAB Hub Reel Used to attach EIA or NAB hub reels Hold Down Knobs to the reel table. (Refer to Sec.
  • Page 20 OUTPUT Level Used to control the playback level Controls of the corresponding channel. (Control is deactivated when the SRL switch is in the "SRL" position.) In the "SRL (Standard Reference SRL Switch and Indicator (red) Level)" position, the red indicator is illuminated.

  • Page 21: Operating Informatin

    MONITOR SOURCE/ In the "out" (SOURCE) position, the TAPE Switch input signal is fed to the LINE OUT connectors, the PHONES jack, the VU meters, and the peak indicators. In the "in" (Tape) position, the signal being reproduced is fed to the LINE OUT connectors, the PHONES jack, VU meters, and the peak indicators.

  • Page 22: Reproduction

    Set the reproduce head selector switch (Index No. 17 in Table 3-1) to the appropriate position as determined by the track format of the tape to be reproduced. If desired, connect a headset or monitor speaker/amplifier to the PHONE jack. 3.2.3 REPRODUCTION To reproduce, proceed as follows:...

  • Page 23: Recording With Selective Production

    3.2.5 RECORDING WITH SELECTIVE REPRODUCTION The selective reproduction function causes the reproduced audio to be derived from the record head rather than from the reproduce head. This permits a recording to be made on another channel synchronized (in phase) with the channel being reproduced. record with selective reproduction, proceed as follows.

  • Page 24: General Information Of Maintenance

    Equipment Type Suggested Model Used For Period Head cleaner OTARI ZA-51B Cleaning the 8 hours heads and guides Isopropyl or Any (OTARI Clean­ Cleaning the tape 8 hours denatured ing Kit ZA-51B guides, capstan, and pinch-roller alcohol contains the above cleaning materials.
  • Page 25 Table 4-2 Reproduce Alignment Test Tape MRL *1 Reference Level Tape Speed Equalization Catalog Number (Fluxivity) nWb/m ° 2 1 J 2 0 5 2 5 0 7-1/2 ips nWb/m*^ 2 1 T 2 0 4 2 5 0 3-3/4 ips 2 1 F 2 0 1 - A 2 5 0 n W b / m * ^...

  • Page 26: Routine Maintenance And Conversion Information

    SECTION V. ROUTINE MAINTENANCE AND CONVERSION INFORMATION 5.1 ROUTINE MAINTENANCE It is important that routine maintenance should be performed at the recommended intervals. Exterior cleaning and demagnetization should be performed after every eight hours of operation, and the interior of the transport should be cleaned once a month.

  • Page 27: Lubrication

    For lubrication, pro­ ceed as follows, referring to Fig. 5-3: CAUTION DO NOT USE ANY OIL EXCEPT ANDEROL OTARI LUBRICATING OIL PZ9E003 FOR LUBRICATION. BE CERTAIN TO CLEAN THE CAPSTAN SHAFT THOROUGHLY. LUBRICATING OIL COULD RUIN THE CAPSTAN PINCH ROLLER AND MAGNETIC TAPE.

  • Page 28: Equalizer Change

    EQUALIZER CHANGE The equalizer between the NAB or the IEC can be changed by sliding EQUALIZER selector switch on the rear panel of the amplifier unit. However, a fine equalizer adjustment and a record level set are required. Table 5-1 Record Level Reference Relative...

  • Page 29: Fuse Replacement

    FUSE REPLACEMENT If a fuse is blown, it is important that the possible cause is checked before replacing the fuse. CAUTION FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE OF FUSE. BEFORE REPLACING THE FUSE, REMOVE THE POWER CORD FROM THE POWER SOURCE.

  • Page 30: Speed Conversion

    SPEED CONVERSION Normally MX-5050 MKIH-2 is factory shipped out with 7-1/2 ips and 15 ips. But MX-5050 MKIH-2 can be converted to 3-3/4 ips and 7-1/2 ips speed combination by user's modification. Followings are the information on speed conversion. Refer to page 5-7 to access to control P.C.B. assembly. is located on the bottom panel.

  • Page 31: P.c.b. Assemblies And Parts Lists

    Also the lists include the parts which should be replaced with the exact same parts supplied by OTARI to maintain the performance. Many diodes, transistors, and ICs are well described in the schemat­...
  • Page 32 PB-44SD CONTROL P .C .B . ASSEMBLY [ 2 ] : • -VW- i. ,2 * • « ,«L. ---------- V f T i M F * I * R1 2 8 j 3 ' . D C 3 0 [□3 lllu n lL i m i U B L ll J r il lL n T T T T T T T T T T T I I ] C O M P O S ID E ( 7 40 ?
  • Page 33 PB-44SD CONTROL P.C.B. ASSEMBLY [2]: Ref. No. Description Parts No. Notes P.C.B. PB9A437 Connector CN 4 02 213 "El" Type 2P Connector CN403043 "El" Type 3P Connector CN403075 Pin Housing 3P Connector CN404044 "El" Type 4P Connector CN405045 "El" Type 5P Connector CN406046 "El"...

  • Page 34: Exploded View Drawings And Parts Lists

    When ordering parts, give a full description, using both the part number and the name of the part. If there seems to be a discrepancy between the drawings herein and your machine, contact OTARI.
  • Page 36 T5068 TAPE DECK ASSEMBLY [2] : Notes Ref. No. Description Parts No. T5064-A Panel Ass'y, Trim Pole, Guide KG6E003 Panel, Trim, Control T506702 Panel, Top T506701 Clamp, Code PZ1G053 Bracket, Panel Reinforce T506604 Trans, Power TF11074 Cover A, Deck T506802 Flame T506501 Bracket, Rear Panel...
  • Page 38 K1069 CASE ASSEMBLY [4]: Ref. No. Description Parts No. Notes Panel A, Side K106901 Panel B, Side K106902 Amp. Ass'y, 2ch Rec/Rep A1065 Cover, Ventilation K106904 Reel Ass'y KW-4R Tension Arm Ass'y A KA-4X Tension Arm Ass'y B KA-4Y Capstan Ass'y KC-4Y Pinch Roller Ass'y KP-4N...
  • Page 39 KC-4Y CAPSTAN ASSEMBLY [5]: KP-4N PINCH ROLLER ASSEMBLY [5]: KP-4L SHIFTER ASSEMBLY [5]: 7-11...
  • Page 40 CB-253 CONTROL SWITCH ASSEMBLY [6]: Ref. No. Description Parts N o . Notes Button A KN2069 Button B KN2070 Button C KN2071 Button D KN2072 Guide, Button CB20602 G uide, Button CB20701 Panel, Top, Control T506705 P.C.B. Ass'y, LED (B) PB-83E Switch , Micro WH11007...
  • Page 41 KA-4X,4Y TENSION ARM ASSEMBLY [7]: KI-4J IMPEDANCE ROLLER ASSEMBLY [7 ] : SR-5K TAPE TIMER ASSEMBLY [7]: 7-15...
  • Page 42 KH-41I HEAD ASSEMBLY [8]: Ref. No. Description Parts No. Notes 8- 1 Housing Ass 'y, Head KH-4Y-A Stud KH4Y009 Base Plate, Head KH0C019 Bracket, P. C.B. L KH41I01 Bracket, P. C.B. R KH41I02 P .C .B . Ass' y, Head PB-78IA Spring, Head GS2019...
  • Page 43 KW-4R REEL ASSEMBLY [ 9 ] : 7-19...
  • Page 44 —* TO EXT.CONT.CONNECTOR PI N 24 |— RES ET . 1 o o 1 — 1 — -*r l/J N ----- - — ZA-63X CABLE > 1 nc ASS ’ Y I AC 2 - 1 FAST | AC 1 9 . SV DELY 24 M2- 2 + 5V 2 - 3...
  • Page 45 O T A R I D E S C R I P ­ R E F P A R T T I O N 1 - 6 Q C 1 8 1 5 B L 2 S C 1 8 1 5 B L I Q .
  • Page 46 PE/E.ACNCE '•a. /WFE.BEACE « e . flTAAl PABT AB. 0E3CAIPTIBA n o * b e f e a e a c e «a. bta a j pa a t wa. | o e s c w ip t io a a e f e b e a c e * a .
  • Page 48 MX5050 MK-III 2 TAPE PvEC ORDER SCHEMATIC DIAGRAMS TYPE DWG. # OTARI PART # DESCRIPTION REC/REP AMP. ASS'Y 3-8097 A10620B PB44S0C CONTROL P.C.B. ASS'Y 3-9055 REC.DELAY CONTROL P.C.B. ASS'Y PB7800A 3-8495 WIRING DIAGRAM 3-9054 T50680B 1984 28. FEB. MX5050 MK-III 2...

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