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Resumen del manual
A separate document (Order No. 8288010101) is available for the revised section of the manual. * The Service Manual for A-8LR starts from page 71 . 8 TRACK RECORDER/REPRODUCER Service Manual UK and AUS versions FCA and CND versions EUR versions DM versions 0700464 ^ 0201667 ^ 0601195 ^ 1000632 ^ Fostex TABLE OF CONTENTS 1. INTRODUCTION ................................................ 3 2. SPECIFICATIONS................................................ 4 3. THE CONTROLS AND THIER FUNCTIONS........................... 6 4. FUNCTION OF THE CONTROL CIRCUITS............................11 5. ROUTINE MAINTENANCE ........................................22 6. SPECIAL MAINTENANCE.........................................24 7. EXPLODED VIEW, PCB ASSEMBLIES AND PARTS LIST................43 MODEL A-8LR SERVICE MANUAL...................................71 1. THE CONTROLS AND THEIR FUNCTIONS...........................73 2. SPECIFICATIONS................................................78 6. SPECIAL MAINTENANCE.........................................79 7. PCB ASSEMBLIES AND PARTS LIST................................87 NOTES * Adjustment procedures are given in this manual which also includes a Parts List and schematic diagrams to assist the service technician in maintaining the Model A-8 . Please feel free to contact the nearest Fostex Dealer and Distributor, or write directly to a Fostex office, the addresses of which are printed on the back cover of this manual. * Noise Reduction System manufactured under license from Dolby Laboratories Licensing Corporation. 'Dolby1 and the double-D symbol are trademarks of Dolby Laboratories Licensing Corporation. CAUTION A Parts marked with this sign are safety critical components. They must always be replaced with identical components. Refer to the Fostex Parts List and ensure exact replacement. 2 1. INTRODUCTION Fostex Model A-8 is a small size, lightweight, 8 track, 8 channel recorder/ reproducer for 1/4" tape. It features simple switching between sync and record modes by combined action of the RECORD TRACK and MONITOR selectors, and simple switching of the monitor to these modes, punch in/out without any clicks in the recording, zero position return function of the tape counter in the rewind mode, pitch control function, and other features necessary in multi-track recording. In addition, approximately 20dB of noise reduction is obtained by the built-in Dolby C Type noise reduction system. Other types of noise reduction system can also be used with this recorder by the front panel Noise Reduction Switch which allows patching in of external NR systems to jacks provided for this purpose. Maintenance of the transport is made by removing the front trim panel, and for checking and adjusting the record/reproduce amplifier, by removing the bottom cover. •358- 0 pi-! |-2-- r-~1 !_£-1 n n n n ° tJ o u u a o ol DDDQ 00 o -- 1| H L=1 3 2. SPECIFICATION TAPE FORMAT REEL SIZE TAPE SPEED PITCH CONTROL LINE INPUT (X4) LINE OUTPUT (X8) RECORD LEVEL CALIBRATION EQUALIZATION WOW & FLUTTER STARTING TIME FAST WIND TIME OVERALL FREQUENCY RESPONSE SIGNAL TO NOISE RATIO T H D ERASURE POWER REQUIREMENTS DIMENSIONS WEIGHT 1/4 inch tape width, 1 mil base 8 track, 8 channel (4 channel X 2 Record, 8 channel Reproduce) 7 inch 15 ips (38cm/s), ±0.5% ±10% -lOdBV (0.3V), impedance; 15KS2, unbalanced -lOdBV (0.3V), load impedance: lOKii or higher, unbalanced 0 VU referenced to 250nWb/m of tape flux IEC (35 microsecs.) ±0.06% peak (ANSI), weighted, measured with flutter tape Less than 0*5 sec. 130 second for 1800 ft. of tape 40Hz ^ 18KHZ, ±3dB 72dB weighted, 60dB unweighted, referenced to 3% T H D level lOdB above 0 VU) at lKHz Less than 1% at lKHz , 0 VU Better than 70dB at 1 KHz 120V AC, 60Hz, SOW (U.S.A./Canada models) 220V AC, 50Hz, 60W (European models) 240V AC, 50Hz, 60w (UK/Australian models) 100/120/220/240V AC, W (General export models) 14" (W) X 13-1/2" (H) X 6-3/4" (D) 29 lbs. (13 kg.) 4 18 19 17- postex pepsonal muuttrack «Maf wiLûiiii? wiiiifflij' y,igT S i ioi ^ *>*7* i 101 4 . Iipbwcw>j \T' vu ' \ vu \ vu rl?£L3 ao«T« * idi 3 | te* ! >■ 3 ioi „ « yrvLiiüfiii ¿r" N VU =J0B o iticom tmck 3-f Mrur I ï/e v? 4/o ZE*0ftT* M MM P.FWO 23 12 11 8 10 9 22 21 24 èoè ècè -OUTPt/T- èoè éoè è0è éÀ rrz- TAPC T MM SPORT @®îï 55ÎÜH9 m -3 ■4 -5 6 -7 © O 5 3. THE CONTROLS AND THEIR FUNCTIONS 1) Head shield gate The head shield gate is manually operated. If the gate is retracted down, a short downward push of its top edge vl?ill release its lock and the gate fully rise by spring action. To retract it, the gate is pressed down and will be locked at the limiting position. 2) Rewind button [REWIND] Depressing this button transports tape at high speed from the right reel to the left reel. 3) Fast forward button [F.FWD] Depressing this button transports tape at high speed from the left reel to the right ...
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