Mitsubishi Electric PD-4265 Service Manual page 3

Insulation Resistance Check
With the AC plug removed from an AC power source, place a
jumper across the two plug prongs. Turn the AC power switch on.
(Case of PD-5065/4265, AC power is always on.)
Using an insulation tester (DC 500V), connect one lead to the
jumpered AC plug and touch the other lead to each exposed metal
part (input/output terminals, screwheads, metal overlays, control
shafts, etc.). The resistance shuld be greater than 10MΩ.
Leakage Current Hot Check
Plug the AC line cord directly into an AC power source (do not
use an isolation transformer for this check).
Turn the AC power switch on.
Using a "Leakage Current Tester", measure for current from all
exposed metal parts of the cabinet (input/output terminals,
screwheads, metal overlays, control shaft, etc.), particularly any
exposed metal part having a return path to the chassis, to a known
earth ground (water pipe, etc.). Any current measured must not
exceed 1.5mA.
Device
under
test
Test all
exposed metal
surfaces
Also test with
plug reversed
(Using AC adapter
plug as required)
AC Leakage Test
A N Y M E A S U R E M E N T S N OT W I T H I N T H E L I M I T S
OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL
SHOCK HAZARD AND MUST BE CORRECTED BEFORE
RETURNING THE SET TO THE CUSTOMER.
Reading should
not be above
Leakage
1.5mA
current
tester
Earth
ground
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in PIONEER set have
special safety related characteristics. These are often not evident
from visual inspection nor the protection afforded by them
necessarily can be obtained by using replacement components
rated for higher voltage, wattage, etc. Replacement parts which
have these special safety characteristics are identified in this
Service Manual.
Electrical components having such features are identified by
marking with a on the schematics and on the parts list in this
Service Manual.
The use of a substitute replacement component which dose not
h a v e t h e s a m e s a f e t y c h a r a c t e r i s t i c s a s t h e P I O N E E R
recommended replacement one, shown in the parts list in this
Service Manual, may create shock, fire or other hazards.
Product Safety is continuously under review and new instructions
are issued from time to time. For the latest information, always
consult the current PIONEER Service Manual. A subscription to,
or additional copies of, PIONEER Service Manual may be
obtained at a nominal charge from PIONEER.
PD-5065
3