Panasonic PSG1604029AE Service Manual - Page 3

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1 Notes

This simplified service manual is base on SA-MAX9000GN/PU (Order No. PSG1602004CE).

1) This service manual contains only following information

- Specifications

- Block Diagram

- Schematic Diagram

- Printed Circuit Board

- Exploded View and Replacement Parts List

2 Safety Precautions

2.1.

1. IMPORTANT SAFETY NOTICE

There are special components used in this equipment which are important for safety. These parts are marked by

Schematic Diagrams, Circuit Board Layout, Exploded Views and Replacement Parts List. It is essential that these critical parts

should be replaced with manufacturer's specified parts to prevent X-RADIATION, shock, fire, or other hazards. Do not modify

the original design without permission of manufacturer.

2. An Isolation Transformer should always be used during the servicing of AC Adaptor whose chassis is not isolated from the AC

power line. Use a transformer of adequate power rating as this protects the technician from accidents resulting in personal

injury from electrical shocks. It will also protect AC Adaptor from being damaged by accidental shorting that may occur during

servicing.

3. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or

damaged by the short circuit.

4. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly

installed.

5. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.

2.1.1.

Leakage Current Cold Check

1. Unplug the AC cord and connect a jumper between the two prongs on the plug.

2. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part on

the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the

chassis, the reading should be between 1M and 5.2M.

When the exposed metal does not have a return path to the chassis, the reading must be

in the