Aloka ProSound Alpha 10, Service Manual, Page: 9 / 405

MN2-2008
SECTION 1 How to use this service manual
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1-1 Service Manual
1. This service manual has been prepared for persons in charge of repair at the field.
2. This service manual is compiled according to the following basic principle. ”For service, pick out a
faulty PCB and replace it with a new PCB.”
3. Make the best use of this service manual, making also reference to available technical support
information such as “Technical Bulletin”.
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Contents of this Service Manual
1. The equipment is repaired by PCB replacement. Therefore this service manual does not include the
circuit diagrams of the PCB unit. For the function of each PCBs whose circuit diagram is not
included, refer to ”SECTION 4
PRINCIPLE OF SYSTEM OPERATION”.
In “SECTION 4”, Specification of System, Principle of System, System Block Diagram, PCB
Block Diagram, the explanation of each PCB Block Diagram, and signal list are described.
However, “Cable Connection Diagram”, “Circuit Diagram of PCB equipped with the panel
switches which are easily exchangeable at the field” and ”Circuit Diagram composed of general
circuit such as TV monitor and Power Supply unit” are described in ”SECTION 5
SCHEMATICS”.
2. For changes and modifications of as well as additions to specifications, if any, prompt information
will be given to you by means of “APPENDIX
Manual Change Information”.
#
IMPORTANT
#
Always observe the manner specified for replacement, addition, or
deletion of “Manual Change” to prevent missing of necessary
information and keeping of erroneous information.
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Construction of This Service Manual
The structure of Service Manual is as follows:
1) Service Instructions .......................................................................... SECTION 1~3, 5~9, 11
2) Principle of Operation....................................................................... SECTION 4
3) Parts List ........................................................................................... SECTION 10
4) Manual Change Information ............................................................. APPENDIX