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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!!!!
AV-21LS2 AV-21LX2 AV-2168TEE
REPLACEMENT OF CHIP COMPONENT
a CAUTIONS
1. 2. 3. 4. Avoid heating for more than 3 seconds. Do not rub the electrodes and the resist parts of the pattern. When removing a chip part, melt the solder adequately. Do not reuse a chip part after removing it.
a SOLDERING IRON
1. Use a high insulation soldering iron with a thin pointed end of it. 2. A 30w soldering iron is recommended for easily removing parts.
a REPLACEMENT STEPS
1. How to remove Chip parts
Resistors, capacitors, etc. (1) As shown in the figure, push the part with tweezers and alternately melt the solder at each end.
2. How to install Chip parts
Resistors, capacitors, etc. (1) Apply solder to the pattern as indicated in the figure.
(2) Grasp the chip part with tweezers and place it on the solder. Then heat and melt the solder at both ends of the chip part. (2) Shift with tweezers and remove the chip part.
Transistors, diodes, variable resistors, etc. (1) Apply extra solder to each lead.
Transistors, diodes, variable resistors, etc. (1) Apply solder to the pattern as indicated in the figure. (2) Grasp the chip part with tweezers and place it on the solder. (3) First solder lead A as indicated in the figure.
SOLDER
SOLDER
A B
(2) As shown in the figure, push the part with tweezers and alternately melt the solder at each lead. Shift and remove the chip part.
C
(4) Then solder leads B and C.
A B C
Note : After removing the part, remove remaining solder from the pattern.
No. 52031
13
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