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This is exactly the thing you need to service this box. The manual is complete and the quality of the scan is good. I recommend this!
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The delivery of this manual was very fast, less than 8 hours. The manual is very clear and concise, and helped a great deal in the repair and final setup of the Hitachi HMA-G2 Amplifier.
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Great service. The manual was exactly what I was looking for: schematic + layout. I managed to fix the player. Highly recommended!
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At $5,00 certainly good bang for your buck. Includes electric schematics as well as exploded parts view + parts list for reordering. Unfortunately no details on the PCB contents or working, but then again, this is not overly complex. Best bonus: this manual does contain the heavily searched for LED error codes as well as descriptions for test operation. Haven't gotten around to fixing the machine yet, one thing the manual won't do for you is getting it out of the kitchen assembly :-(
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It`s not your fault tear down is rather incomplete. It doesn`t have complete instructions as to deconstruction for repair.
VL-FD1U
8-4. Running rough adjustment
(Since this adjustment is performed without cassette controller, put a proper weight so that the cassette does not rise , and make an adjustment.) 1) Su, Tu guide roller height adjustment <Method and description> (1) Loosen the guide roller lock screw, then tighten loosely so that the roller turns easily. (2) Replay an alignment tape, and adjust the Sup, Tu guide roller so that the envelope sides of entrance and exit are flat. (3) Perform ± 1/4 shift, then, as in the above case, adjust until the envelope becomes flat. * If running is difficult for the entrance changed, turn the T roller to counter clockwise 180°. (refer to Fig. 1)
NG ±1/4 shift Entrance side Normal Exit side NG ±1/4 shift
Turn to 180° T roller
Fig. 1
2) Check of V/SR envelope wave form <Method and description> (1) Confirm that the envelope waveform peaks in V/SR mode are uniform. (2) If they are not uniform, fine-adjust the guide roller and the Tu guide. 3) Check of tape wrinkles <Method and description> (1) Check that the tape is not distorted between the Tu guide and pinch in the PB mode and the V/SR mode. -If crease is found, make an adjustment in the range of ±180°. -After adjustment apply Screw Lock.
Pinch roller
Adjust so that A
A
�
�
B.
B
Wrinkles Tu guide
Deformation
Deformation
4) Check the rising time of the envelope wave form <Method and description> (1) Check the rising time of the envelope when switching from V/SR mode to PB mode. (Within 5 sec) (2) Check the rising time of the envelope when switching from STOP mode to PB mode. (Within 5 sec)
8-5. Final running adjustment
(Perform adjustment without removing the cassette controller.) 1) Adjustment of Sup and Tu guide roller height <Method and description> (1) Perform ± 1/4 shift, then if the envelope wave's ratio of MAX. to MIN. are 60% or less, adjust again the height of guide roller. (Refer to Fig. 2) (2) Finally adjust the lock screw of Sup and Tu guide roller. (3) Once perform unloading and then loading to set the PB mode, and make sure that the envelope waveform does not change. 2) Adjustment of playback SWP <Method and description> (1) Playback the alignment tape for switch point adjustment. (2) Perform SWP automatic adjustment with adjustment remote control. * When replacing the mechanism and drum, adjust the phase and equalizer using the adjustment remote control. (Refer to "10. ADJUSTMENT THE ELECTRICAL CIRCUIT".)
EMIN EMAX
EMIN EMAX
Fig. 2
60 (%)
16
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