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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+++++++++++++++++++++++++
Repair Item 2-B
~1.1 V
B
Figure 7
When the waveform at IRF with an osilloscope.
Is the waveform at IC102 pin 35 like that shown in fig. 7 ? Yes * Check IC103 pins 32, 34, 4, 5, 36, 37, 38, 57, 21 and circuit around them. * Check IC103 pins 8, 9 and 77. * IC104 or IC103 is defective.
No
* Check soldering of C159 and IC103 pins 35 and 21. * IC103 is defective.
8
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