MX-5050BII Instruction Manual — Digital Edition · Part 0 · scan pages 1-10
Front Matter
OTARI
MX-5050BII
SERIES PROFESSIONAL RECORDERS
INSTRUCTION MANUAL
PROFESSIONAL PRODUCTS
⤢ zoomA single tape reel seen at an angle, its hub spoke cut-outs visible, with a length of recording tape trailing diagonally off the reel toward the upper right, photographed on the manual's dark, textured cover.
Parts No. OS3-038
OTARI®
MX-5050BII
SERIES PROFESSIONAL RECORDERS
INSTRUCTION MANUAL
Edition No.6
Issued : Sep. 1984
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.
SAFETY INSTRUCTIONS↑ TOP
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Read Instructions — All the safety and operating instructions should be read before the appliance is operated.
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Retain Instructions — The safety and operating instructions should be retained for future reference.
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Heed Warnings — All warnings on the appliance and in the operating instructions should be adhered to.
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Follow Instructions — All instructions should be followed.
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Water and Moisture — The appliance should not be used near water - for example, near a bathtub, washbasin, kitchen sink, laundrytub, in a wet basement, or near a swimming pool, etc.
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Carts and Stands — The appliance should be used only with a cart or stand that is recommended by the manufacturer.
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Ventilation — The appliance should be situated so that its location or position does not interfere with its proper ventilation.
For example, the appliance should not be situated on a bed, sofa, rug, or similar surface that may block the ventilation operatings; or, placed in a built-in installation, such as a bookcase or cabinet that may impede the flow of air through the ventilation openings.
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Heat — The appliance should be situated away from near sources such as radiators, heat registers, stoves, or other appliances (including amplifiers) that produce heat.
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Power Sources — The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance.
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Grounding or Polarization — Precautions should be taken so that the grounding or polarization means of an appliance are not defeated.
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Power-Cord Protection — Power-supply cords should be routed so that 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 appliance.
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Cleaning — The appliance should be cleaned only as recommended by the manufacturer.
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Nonuse Periods — The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time.
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Object and Liquid Entry — Care should be taken so that objects do not fall into and liquids are not spilled into the enclosure through openings.
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Damage Requiring Service — The appliance should be serviced by qualified service personnel when:
A. The power-supply cord or the plug has been damaged; or
B. Objects have fallen, 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.
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Servicing — The user should not attempt to service the appliance beyond that described in the operating instructions.
All other servicing should be referred to qualified service personnel.
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 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.
COMMUNICATION WITH OTARI↑ TOP
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 necessary, replacement parts are required, or technical questions arise, please contact your nearest Otari dealer or write to:
OTARI ELECTRIC CO., LTD.
4-29-18, Minami Ogikubo,
Suginami-ku, Tokyo, 167, Japan
Phone: (03) 333-9631
Telex: J26604 OTRDENKI
OTARI CORPORATION
2 Davis Drive, Belmont,
California 94002, U.S.A.
Phone: (415) 592-8311
Telex: 25 9103764890
OTARI ELECTRIC DEUTSCHLAND GmbH.
Gielenstrasse 9, 4040 Neuss 1
F.R. Germany
Phone: 02101-274011
Telex: 41 8517691 OTEL D
OTARI SINGAPORE PTE., LTD.
Unit 5350, 2nd floor, Woh Hup
Complex, 5001, Beach Road,
Singapore, 0719
Phone: 294-5370
Telex: 87 36935 RS36935 OTARI
OTARI ELECTRIC (UK) LTD.
Herschel Industrial Centre, Church Street,
Slough SL1 1EL, Berkshire, United Kingdom
Phone: (0753) 38261-2
Telex: 849453 OTARI G
Another part of Otari's continuous 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 our information and service applicable to your requirements, and for the technical support to function properly, please include the following information, most of which can be obtained from the name plate on the equipment in all correspondences.
- Model Number
- Serial Number
- Date of purchase
- Name and address of dealer from whom machine was purchased
- Power requirements (voltage and frequency) of the machine
- Manual number to which you are referring
TABLE OF CONTENTS↑ TOP
| PAGE | SECTION | TOPIC |
|---|---|---|
| V | AMPLIFIER ADJUSTMENTS | |
| 5-1 | 5.1 | Access to the Amplifier |
| 5-1 | 5.2 | Amplifier P.C.B. Assembly layout |
| 5-6 | 5.3 | Block Diagram and Circuit Description |
| 5-6 | 5.3.1 | Reproduce Circuit |
| 5-6 | 5.3.2 | Record Circuit |
| 5-9 | 5.4 | Transport Control Timing Chart |
| 5-9 | 5.5 | Amplifier Adjustment |
| 5-9 | 5.5.1 | Test Tape Selection |
| 5-10 | 5.5.2 | Head Alignment |
| 5-12 | 5.5.3 | Reproduce Equalization Adjustment |
| 5-13 | 5.5.4 | Bias Adjustment |
| 5-15 | 5.5.5 | Record Level, Monitor Level Adjustment |
| 5-15 | 5.5.6 | Peak Indicator Trigger Level Adjustment |
| VI | TAPE TRANSPORT MAINTENANCE AND REPLACEMENT PROCEDURE | |
| 6-1 | 6.1 | Transport Access |
| 6-2 | 6.2 | Brake Adjustment |
| 6-4 | 6.3 | Capstan Pinch Roller Pressure Adjustment |
| 6-6 | 6.4 | Speed Conversion and Speed Adjustment |
| 6-7 | 6.5 | Reel Motor Assembly Replacement |
| 6-7 | 6.5.1 | Reel Table Height Adjustment and Replacement |
| 6-7 | 6.5.2 | Reel Motor Replacement |
| 6-8 | 6.5.3 | Brake Band and Solenoid Replacement |
| 6-9 | 6.6 | Power Transformer Replacement |
| 6-9 | 6.7 | Capstan Motor Replacement |
| PAGE | SECTION | TOPIC |
|---|---|---|
| 6-10 | 6.8 | Pinch Roller Replacement |
| 6-11 | 6.9 | Head Assembly Replacement |
| 6-11 | 6.9.1 | Description |
| 6-12 | 6.9.2 | Head Stack Replacement |
| VII | PERFORMANCE TESTING | |
| 7-1 | 7.1 | General Notice |
| 7-1 | 7.2 | Test Tapes |
| 7-2 | 7.3 | Test Conditions |
| 7-2 | 7.4 | Performance Tests |
| 7-3 | 7.4.1 | Overall Signal-Noise Ratio |
| 7-4 | 7.4.2 | Overall Distortion Test |
| 7-5 | 7.4.3 | Crosstalk Test |
| 7-6 | 7.4.4 | Erasure Test |
| 7-7 | 7.4.5 | Tape Speed Measurement |
| 7-8 | 7.4.6 | Flutter and Wow Test |
| VIII | P.C.B. ASSEMBLIES AND PARTS LISTS | |
| IX | EXPLODED VIEW DRAWINGS AND PARTS LISTS | |
| X | CIRCUIT DIAGRAMS |