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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+++++++++++++++++++++++++
5 Theory of Operation
2. 3.
Step 2 additional columns to the right. Print the 10th column, step 4 columns to the right, print 11th column, step 4 columns to the right. Repeat until 9 columns are laid down (total of 18 so far). The 18th column also includes a four step movement to the right. Step 1 additional column to the right. Print the 19th column, step 4 columns to the right, print the 10th column, step 4 columns to the right. Repeat until another 9 columns are laid down (27 total so far). The 27th column also includes a four step movement to the right. Step 2 additional columns to the right. Print the 28nd column, step 4 columns to the right, print the 29th column, step 4 columns to the right. Repeat until the last 9 columns are laid down for a total of 36 pixel columns.
4. 5.
6. 7.
The intermediate 2-step, 1-step and 2-step movement between the 9th and 10th pixel columns, the 18th and 19th columns, and the 27st and 28nd columns, respectively, allow the 36 pixels columns of each jet to properly interlace with the 36 pixel columns of the other jets it is combined with. A total of 1565 columns, each 3,134 dots tall, are laid down.
Paper pick
To pick a sheet of paper, the process motor rotates clockwise, driving the process drive belt and the compound gear counterclockwise. Rotating counterclockwise, the compound gear turns and, in turn, engages a gear train that rotates the pick roller clutch gear counterclockwise. The paper pick solenoid 1 (mounted on I/O board 1) energizes for a moment, engaging the paper pick clutch and allowing it to rotate one revolution. The pick roller rotates and pulls a sheet of paper from the paper tray. The sheet of paper trips the paper pick sensor to assure that the paper was picked from the tray. If the paper is not sensed, the pick solenoid is energized, up to six times, to rotate the pick roller again to attempt to recover from the mis-pick and pick the sheet of paper. With the paper-pick sensed, the paper-feed electric clutch energizes to allow the upper and lower paper-feed rollers to rotate and carry the sheet of paper to the paper pre-heater. At this point, the paper stops at the entry to the paper pre-heater, tripping the paper pre-heater entry sensor on the left end of the paper preheater. The paper also trips the paper width (A/A4-size) sensors on the right end of the paper preheater to verify that the width of the paper is within the printer�s speci�cations. At this point, the process motor is stopped to wait for more ink deposition on the drum. When ink deposition is about 95% complete, the process motor is activated to bring the sheet of paper through the paper pre-heater and to the trans�x position. The paper preheater heats the paper to improve ink transfer. The leading edge of the sheet of paper trips the paper preheater exit sensor as it passes out of the paper preheater.
5-24
Phaser 360 Color Printer
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