Nakamichi ZX - 7, 3 Head Cassette Deck, Serviced, Upgraded, Elna Silmic II Caps.

Up for auction is a Nakamichi ZX-7, 3 head stereo cassette deck. The deck is fully serviced and the following repairs have been done: - Cleaned the heads and the pinch rollers. - Changed the belts and the idler tire.- Lubricated the motors shafts, adjusted the speed and checked the wow & flutter, the value is 0.035% to 0.045%.- Checked and aligned the playback/record head for correct height and azimuth. - Cleaned all the old sticky lubricants from gears/capstans/caps...tan shafts and lubricated the transport mechanism. - Replaced the reel sensor and cassette compartment lamps.- Replaced the electrolytic caps in the audio and secondary power supply circuits using Elna Silmic II caps up to 1000uF. - Replaced the electrolytic caps  in the main power supply/logic circuits using Nichicon and United (Nippon) chem-icon caps. - Replaced the orange polypropylene caps using WIMA and KEMET caps.- Replaced a bad coil on the record amplifier section.- Increased the value of the playaback power supply filter caps from 47uF to 100uF.- Increased the value of the +12V power supply filter caps from 13600uF to 14700uF, and from 6800uF to 10000uF.- Upgraded the record/line out/headphones op-amps using the OPA211/LME49720/NE5532 op-amps respectively.- Adjusted the electronics for correct VU meter/playback/azimuth levels.- Tested record and playback using pink noise (20Hz to 21Khz). - Tested record and playback using tones at 20Hz, 400Hz, 1kHz, 15kHz, 20kHz, without Dolby, with Dolby B & C. All the functions are operating as they should be, playback, record, ff, rew, pause, cue, counter, counter memory, Mpx, Dolby B & C, fader, azimuth alignment, oscillators. The sound and the stereo image are excellent, the bass is tight, the vocals are very defined, the high frequencies are crystal clear, both in playback and recording modes. The cassette mechanism run smoothly. Externally the deck is in excellent condition (not mint), considering the age. The faceplate is clean and the top cover had a few light scratches which i covered. The only blemish is the missing ZX right channel calibration knob, which I replaced it using one from a Dragon. It's not perfect, is better than nothing and is a temporary solution till find one on ebay.  This is a 120V model, S/N 07806, production date 1982. With the deck are included the old parts. All the questions are very welcome. I moved recently in US from Greece, where I was working in Greek Nakamichi service during 90's and I have all the professional equipment (original test tapes, oscilloscope, wow & flutter meter, distortion meter, frequency response meter). If you need to service your deck I'll be happy to help you. See also my other items and my feedback. Please ask for shipping cost. Usually is 35$ to 85$ depending the state by Fedex, plus insurance cost. If it is less, I always refund the difference. Thank you for looking.

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