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The AKAI 1720 model reel to reel tape recorder described in this Manual is quite an old unit - circa late 1960's. As a consequence, the description of the mechanical details - and adjustments thereof - is quite critical. The manual does this quite well. The schematics are also well presented and have detailed PCB overlays. Probably the only negative is that some half-tone detail has been lost from the original manual as it has been scanned in simple B&W.
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Perfect source for service manuals: fast and professional transaction; high quality, perfect readable and largely scaleable PDF; complete schemes, diagrams and spare part list. Tnx a lot, cu again!!!!
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I got your link from a friend and I must say that I am really satisfied with your service. Specially this B&O manual I didn't find anywhere on the web... but you could deliver it :-) . You deliver very fast and the copy is of good quality. So your webpage is bookmarked. Thanks
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This was the Sony CCU-500A Service manual I was looking for.
The price was reasonable.
The permission to download was quck.
I will use Owner-Manual.com for all my manual needs.
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Excellent printing quality.
A complete and very usefull service manual with all details.
GREAT SERVICE AT VERY LOW PRICE!
A+++++++++++++++++++++++++
PRACTICAL SERVICE FIGURE
< TUNER SECTION >
< FM SECTION >
IHF Sensitivity: (THD 3%) Signal to noise ratio: (Input 54dB) Distortion: (Input 54dB) Auto stop level: Stereo separation: Intermediate frequency: 15dB±5dB (at 90MHz) 14dB±5dB (at 98.0/108.0MHz) More than 55dB (at 98.0MHz) Less than 1.5% (at 98.0MHz) 25±10dB (at 98.0MHz) More than 17dB (at 98.0MHz) 10.7MHz
FL (13-ST-36GNAK) GRID ASSIGNMENT/ANODE CONNECTION
< LW SECTION > (K, EZ MODELS)
Sensitivity: 58±5dB (at 144kHz) 55±5dB (at 198kHz) 52±5dB (at 290kHz) More than 25dB (at 198kHz) 450kHz
GRID ASSIGNMENT
Signal to noise ratio: Intermediate frequency:
< DECK SECTION >
Tape speed: Wow & flutter: Distortion: 3000Hz+3%/�2% Less than 0.35% (JIS, R.M.S) Less than 3.0% (PB) Less than 7.0% (REC) More than 40dB (PB) More than 35dB (REC/PB) More than 55dB More than 50dB More than 35dB
< AM SECTION > (LH MODEL)
Sensitivity: (S/N 10dB) 46dB±5dB (at 600kHz) 44dB±5dB (at 999kHz) 42dB±5dB (at 1404kHz) More than 38dB (at 1000kHz) Less than 4.0% (at 1000kHz) 35-60dB (at 1000kHz) 450kHz
Signal to noise ratio: Erasing ratio: Cross talk: Separation:
Signal to noise ratio: (Input 74dB) Distortion: (Input 74dB) Auto stop level: Intermediate frequency:
< MW SECTION > (K, EZ MODELS)
Sensitivity: (S/N 10dB) 46dB±5dB (at 603kHz) 44dB±5dB (at 999kHz) 42dB±5dB (at 1404kHz) More than 38dB (at 999kHz) Less than 3.0% (at 999kHz) 50+10/-15dB (at 999kHz) 450kHz
ANODE CONNECTION
Signal to noise ratio: (Input 74dB) Distortion: (Input 74dB) Auto stop level: Intermediate frequency:
37
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