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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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Note : Make these 2 adjustments (3-S1, 3-S2) after perfoming section 3-13. 3-S1. W/B plunge correction adjustment S1-1. Adjustment of NTSC composite 1) Input the 525 all white (with burst) cut-off signal. 2) Adjust the brightness to a value below 10 cd/m2 with CONT and BRT VR. Brightness adjustment:3 cd/m2 3) Turn CHROMA VR to MIN, and measure the color temperature. 4) Turn CHROMA VR to MAX, and make adjustment with
NTSC B-Y
S1-4. Adjustment of DIGITAL 1) Input the DI 525 all white cut-off signal. 2) Repeat the operations S1-1. 2) and 3). 3) Turn CHROMA VR to MAX, and make adjustment with DIGITAL R-Y and DIGITAL B-Y so that the color temperature will be the same as the value measured in item 2). Standard adjustment: The difference should be within 2 JND when CHROMA MIN n MAX. S1-5. Adjustment of NTSC443 composite 1) Input the all white (with burst) cut-off signal. 2) Repeat the operations S1-1. 2) and 3). 3) Turn CHROMA VR to MAX, and make adjustment with NTSC443 R-Y and NTSC443 B-Y so that the color temperature will be same as the value measured in item 2). Standard adjustment: The difference should be within 2 JND when CHROMA MIN n MAX.
and
NTSC R-Y
so that the color temperature will
be the same as the value measured in item 3). Standard adjustment: The difference should be within 2 JND when CHROMA MIN n MAX. S1-2. Adjustment of PAL composite 1) Input the 625 all white (with burst) cut-off signal. 2) Repeat the operations S1-1. 2) and 3). 3) Turn CHROMA VR to MAX, and make adjustment with PAL B-Y and PAL R-Y so that the color temperature will be the same as the value measured in item 2). Standard adjustment: The difference should be within 2 JND when CHROMA MIN n MAX. S1-3. Adjustment of COMPONENT 1) Input the 525 all white cut-off signal to Y. Note : NTSC all white (with burst) may be input. 2) Repeat the opelations S1-1. 2) and 3). 3) Turn CHROMA VR to MAX, and make adjustment with COMPONENT B-Y and COMPONENT R-Y so that the color temperature will be the same as the value measured in item 2). Standard adjustment: The difference should be within 2 JND when CHROMA MIN n MAX.
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