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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+++++++++++++++++++++++++
ELECTRICAL ADJUSTMENT -2/5
<MW/LW Adjustment> Make the following preparation for MW/LW adjustment. Preparation � Measuring instruments: Standard Signal Generator (S.S.G)/Loop antenna/Oscilloscope/Millivoltmeter 1) Connect the unit and measuring instruments as shown in the diagram below. 2) Position the loop antenna connected to S.S.G. and the one connected to the unit 60cm apart.
60cm AC MILLIVOLTMETER OSCILLOSCOPE
Standerd Signal Genertaor
CH1 CH 2 OUTPUT CH1 CH2
SET
HP OUT(L) HP OUT(R)
4. IF Adjustment Requirement: � Test point: HP OUT � Adjustment location: L006 1) Set S.S.G. to AM, carrier of 1404KHz with 30% modulation, and source at 1KHz. 2) Tune the receiving frequency of the unit at MW 1404KHz. 3) While monitoring the waveform at 1KHz through the oscilloscope, lower the output level of S.S.G. maximum (till a certain degree of noise is monitored). 4) Adjust L006 so that the millivoltmeter points maximum. 5. MW Tracking Adjustment Requirement: � Test point: HP OUT � Adjustment locations: L003(BAR-ANT), TC001 1) Adjust TC001 so that the mechanical center. 2) Set S.S.G. to AM, carrier 603KHz with 30% modulation, source at 1KHz, and output at maximum. 3) Tune the unit to the receiving frequency at MW 603KHz. 4) While monitoring the waveform at 1KHz through the oscilloscope, lower the output level of S.S.G. maximum (till a certain degree or noise is monitored). 5) Adjust L003(BAR-ANT) so that the millivoltmeter indicates maximum. 6) Set S.S.G. to AM, carrier 1404KHz with 30% modulation, source at 1KHz. 7) Turn the unit to the receiving frequency at MW 1404KHz. 8) While monitoring the waveform at 1KHz through the oscilloscope, lower the output level of S.S.G. maximum (till a certain degree or noise is monitored). 9) Adjust TC001 so that the millivoltmeter indicates maximum. 10) Repeat the above step 2 to 9 two to three time.
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 $4.99 CSDTD69 AIWA
Owner's Manual Complete owner's manual in digital format. The manual will be available for download as PDF file aft…
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