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The manual was of good quality with high resolution schematic diagrams.
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The manual was very clear and contained all the information I was looking for. My dishwasher is working again because of this servicemanual!
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Quality scan, great manual. I solved my problem with this manual.
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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!!!!
No Tray open / close operation
Is the connector properly inserted into CN800 ? Y When pressing the EJECT SW, does the peak value of the IC400 5Pin become 3.3V? Y When it is in the Tray Open mode, does the IC400 6Pin show 1.65V?
N
Try the operation after inserting the connector to CN800 properly.
N
Check the SW701 patterns and the welding condition.Replace it if the condition is normal.
N
Check the SW701 Open and Close patterns and the welding condition. Replace it if the condition is normal. Y
CLOSE
Y
OPEN
When pressing the EJECT SW, does the IC500 Pin26 vary from 0V to the value between1.15V and 2.15V and then show 1.65V finally?
N
Check the condition and patterns of R615, R616. If they are normal, replace IC500.
N
When pressing the EJECT SW, does the IC500 26Pin vary from 1.65V to the value between 1.15V and 2.15V and then show 0V finally?
N
Y
Is the Tray Motor able to output the Pin49 and 50 of IC500? Y
Y
Replace TRAY MOTER.
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