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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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XP-EV600/EV600B/EV600D SECTION 4 ELECTRICAL CHECKING
The CD section adjustments are done automatically in this set. In case of operation check, confirm that RF level. Precautions for Check 1. Perform check in the order given. 2. Use YEDS-18 disc (Part No.: 3-702-101-01) unless otherwise indicated. 3. Power supply voltage requirement : DC4.5 V in DC IN jack. (J201) VOLUME button : Minimum HOLD switch : OFF RF Level Check Condition: � Hold the set in horizontal state. Connection:
oscilloscope (AC range) MAIN board TJ401 (RF) TJ403 (RF GND)
+ �
Checking Location: � MAIN board (SIDE B) �
Procedure: 1. Connect the oscilloscope to the test points TJ401 (RF) and TJ403 (RF GND) on the MAIN board. 2. Set a disc. (YEDS-18) 3. Press the u button. 4. Check the oscilloscope waveform is as shown below. A good eye pattern means that the diamond shape (�) in the center of the waveform can be clearly distinguished.
RF Signal reference Waveform (Eye Pattern)
VOLT/DIV : 100 mV (With the 10:1 probe in use) TIME/DIV : 500 ns
TJ403 (RF GND) TJ401 (RF)
RF level 0.45 to 0.70 Vp-p
IC404 IC402
To watch the eye pattern, set the oscilloscope to AC range and increase the vertical sensitivity of the oscilloscope for easy watching.
5.
Stop revolving of the disc motor by pressing the x button.
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