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It's a good manual, this one it's a scan from the original factory service manual, great quality 100% readeable. definetely it worths what I paid for.
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A good manual! fast service and good qualityi for pdf document.
thanks!
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Very helpful and complete manual. Maybe only one negative is schematics have sometimes unreadable name of the parts. But it's not a big problem.
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Excellent high quality schematics brought my old Heidelberg back to life. Fast download at a reasonable price. Thanks.
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This document is just what I was looking for, it´s very useful, it contains adjustment procedures for the final stage of the power amp and also
has a complete wiring diagram and description of the main semiconductors used in the design.
AV-28BT8ENS / AV-28BT8ENB / AV-28BT80EN AV-28BT8EPS / AV-28BT8EPB / AV-28BT80EP AV-28BT8EES / AV-28BT8EEB/ AV-28BS88EN
REPLACEMENT OF CHIP COMPONENT
! 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 c hip part, melt the s older adequately. Do not reuse a chip part after removing it.
! SOLDERING IRON
1. Use a high ins ulation s oldering iron with a thin pointed end of it. 2. A 30w s oldering iron is rec ommended for easily removing parts.
! 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 indic ated in the figure.
(2) Grasp the chip part with tweezers and plac e it on the s older. (2) Shift with tweezers and remove the chip part. Then heat and melt the solder at both ends of the chip part.
# Transistors, diodes, variable r esistor s, etc (1) Apply extra solder to each lead.
# Transistors, diodes, variable r esistor s, etc (1) Apply solder to the pattern as indic ated in the figure. (2) Grasp the chip part with tweezers and place it on the solder. (3) First s older lead A as indicated in the figure.
SOLD E R
SOLD E R
A (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. (4) Then solder leads B and C. A B C Note : After removing the part, remove remaining solder from the pattern. C B
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No.52057
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