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There are currently no product reviews.
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Complete MFG Service Manual at a good price FAST !
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Downloaded the manual, reasonably straightforward, pretty much exactly as advertised.
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very helpfull
circuit diagram and sparepart list available
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Very good reproduction (copy) of original manual. Didn't have a parts list, but schematic was completely labeled with parts. Complete instructions on how to adjust mechanical functions of the 8-track deck. Well worth having and at a very reasonable cost.
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It's a full manual. All the parts are in there. I haven't found the problem yett, but I am working on it; hope I can rebuild the part myself. To make it more secure and unbreakable this time. Because the part has failed several times before and costs a lot to let it be repaired.
Thanks so much for this rich illustrated and parted manual.
ADJUSTMENTS
TAPE ALIGNMENT CHART Step Item Reference Value Test Tape Adjust Point Test Point Note Be sure Wow & Flutter is within 0.35% Adjust Tape Speed of end position after adjustment at tape start position Be sure High speed after normal speed adjustment FIG.
Normal 1 Tape Speed Adjustment High 2 3 Azimuth Adjustment Recording Bias Oscillator Frequency Adjustment
3,000~3,010Hz
MTT-111N
RV601
Line Out L/R Channel
FIG.1
5,820~6,180Hz Maximum Level Phase:Within90° 80 KHz±0.5
MTT-111N MTT-114N MTT-5511
-----Head Screw L601
Shorted TP601, TP602 Line Out L/R Channel CM617,GND
FIG.1 FIG.2,3,4
Adjust with frequency counter connected.
FIG.1
Adjust with Frequency Counter Connected Test Tape : MTT-111N(3kHz) MTT-5511(Blank) Set Output Level Measurement Point Forward Side Reverse Side Frequency Counter
FIG. 1 : Tape Speed & Record Bias Oscillator Frequency Adjust Circuit
FIG. 2 : Tape Azimuth Adjust Location (Record/Playback Head)
L-CH Peak
Test Tape MTT-114N (10kHz)
L-CH
Oscilloscope
within 1 dB Output Level R-CH Peak within 1 dB
Set
V
H
Screw Angle
Output Level Measurement Point Screen Pattern
L-CH Peak
R-CH Peak
Screw Angle
In Phase 45 Good
90
135
180
Wrong
FIG. 3 : Tape Azimuth Adjust Head Screw & Waveform
FIG. 4 : Tape Azimuth Adjust Circuit & Waveform
6
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