Mitsubishi HS-U778 Specifications download pdf (Page 5)

INTRODUCTION

This manual provides service information for the adjustments

of mechanical and electrical operations.

Due to design modifications, the servicing procedures and

data given in this manual are subject to possible change

without prior notice.

SAFETY PRECAUTIONS

WARNING : Many of the programs broadcast by television

stations are protected by copyright and Federal law

imposes strict penalties for copyright infringement. Some

motion picture companies have taken the position that

home recording for noncommercial purposes is an

infringement of their copyrights. Until the courts have ruled

on the proper interpretation of the law as applied to home

video recording, this equipment, if used to record

copyrighted material, should be operated at the user’s own

risk.

WARNING :

TO PREVENT FIRE OR SHOCK HAZARD, DO NOT

EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.

This video cassette recorder should be used with AC

120V, 60Hz only.

SAFETY NOTICE

Before returning VCR to the customer a safety check of the

entire VCR should be made. The service technician must be

sure that no protective device built into the instrument by the

manufacturer has become defective or inadvertently

damaged during servicing. Observe all caution and safety

related notes located on or inside the VCR cabinet.

WARNING : Alterations of the design or circuitry of this VCR

should not be made. Any design alterations or additions,

such as circuit modifications, auxiliary speaker jacks,

switches, grounding, active or passive circuitry, etc., or use of

unauthorized camera, cables, accessories, etc. may alter the

safety characteristics of this VCR and potentially create a

hazardous situation for the user. Any design alterations or

unauthorized additions will invalidate the manufacturer’s

warranty and will further relieve the manufacturer of

responsibility for personal injury or property damage resulting

from them. Do not lubricate any motors. When reassembling

the VCR, always be certain that all the protective devices are

put back in place, such as non-metallic control knobs, shield

plates, etc. When service is required, observe the original

lead dress. Components that show evidence of overheating

or other electrical or mechanical damage should be replaced.

WARNING : Replace with same type 1.6A, 125V FUSE.

LEAKAGE CURRENT CHECK

Before returning the VCR to the customer, it is recommended

the leakage current be measured by the following methods.

1. Cold Check

With the AC plug removed from the 120V AC source,

place a jumper across the two AC plug prongs. Turn the

AC switch on. Using an ohmmeter, connect one lead to

the jumpered AC plug and touch the other lead to each

exposed metal part (metal cabinet, screwheads, metal

overlays, control shafts, etc.), particularly any exposed

metal part having a return path to the chassis. Exposed

metal parts having a return path to the chassis should

have a minimum resistance reading of 1 MΩ. Any

resistance below this value indicates an abnormality

which requires corrective action. Exposed metal parts not

having a return path to the chassis will indicate an open

circuit.

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Mitsubishi HS-U778 Specifications Page 5

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