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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+++++++++++++++++++++++++
Dolby®-Pegeleinstellung
Me�punkte ............................... MP 1377, MP 1378 Signalquelle ............................. Dolby®-Testcassette 400 Hz / 200 nWb/m Abgleichelemente .................... R 1241, R 1261 Spezifikation ............................ 450 mV ± 27 mV 1. Schalten Sie die Dolby®-Funktion aus. 2. Legen Sie die Dolby®-Testcassette in den Cassettenschacht ein, und starten Sie die Wiedergabe. 3. Stellen Sie mit R 1241 einen Pegel von 450 mV ± 27 mV an MP 1277 ein. Stellen Sie mit R 1261 einen Pegel von 450 mV ± 27 mV an MP 1278 ein.
* Rauschunterdrückungssystem unter Lizenz von Dolby Laboratories hergestellt. Das Wort Dolby und das Symbol des doppelten D sind die Markenzeichen von Dolby Laboratories.
Dolby® Adjustment
Measuring points ..................... MP 1377, MP 1378 Signal source ........................... Dolby® test cassette 400 Hz / 200 nWb/m Alignment elements ................. R 1241, R 1261 Specification ............................ 450 mV ± 27 mV 1. Switch Dolby® off. 2. Insert the Dolby® test cassette into the cassette compartment. Start tape play. 3. Use R 1241 to adjust a level of 450 mV ± 27 mV at MP 1277. Use R 1261 to adjust a level of 450 mV ± 27 mV at MP 1278.
* Noise reduction system manufatured under the licence of Dolby Laboratories. The Dolby logo and the double D Dolby symbol are registered trademarks of Dolby Laboratories.
Logik-Platte Logic board
PL 0312 A05
R1261
R1241
6 8 1
1377
4 1
8
1
D1140
9 16
D1250
9 11 16
D1350
5 8
1378
R1261 R1241
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