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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!
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3. The base and handset cannot be connected.
Check whether the base is able to set in the test mode. OK Check the TX POWER and the TX FREQUENCY on the base unit. OK Press SKIP key twice, check whether the TXD is output from Pin 48 of IC3. OK Check whether the TXD is output from MOD POINT (See page 28). OK Check whether the handset is able to set in the test mode. OK Check the TX POWER and the TX FREQUENCY on the handset unit. OK Press "3" key, check whether TXD is output from Pin 40 of IC601. OK Check whether the TXD is output from MOD POINT (See page 30). OK Place the handset on the base to charge about 5 seconds, then try connecting again. NG Check R620 and the handset RF unit. NG Check IC601 and its peripheral circuit. NG Check the handset RF unit. NG Check IC604 and its peripheral circuit. NG Check R7, R21 and the base RF unit. NG Check IC3 and its peripheral circuit. NG Check the base RF unit. NG Check IC5 and its peripheral circuit.
� 15 �
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