not be above
Also test with
(Using AC adapter
plug as required)
AC Leakage Test
Leakage Current Hot Check
Plug the AC line cord directly into a 120V AC 60Hz outlet (do not
use an isolation transformer for this check). Turn the AC power
Using a "Leakage Current Tester (Simpson Model 229 equivalent)",
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, conduit, etc.).
Any current measured must not exceed 0.5mA.
ANY MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A POTENTIAL
SHOCK HAZARD AND MUST BE CORRECTED BEFORE
RETURNING THE SET TO THE CUSTOMER.
This set is provided with a X-ray protection for clearly indicating
that voltage has increased in excess of a predetermined value.
Comply with all notes described in this Service Manual regarding
this hold down circuit when servicing, so that this X-ray protection
may correctly be operated.
In the status of the black picture (video muting is being applied)
when no signal is input, high voltage of this set during operation is
less than 30.5kV. In case any component having some relation to
the high voltage is replaced, confirm that the high voltage is lower
than 30.5kV in the status of the black picture when no signal is
To measure H. V. use a high impedance H. V. meter.
Connect () to earth and (+) to the FBT anode cable connector.
(Refer to section "7.1.2 DISASSEMBLY".)
TUBE : The primary source of X-radiation in this set is the picture
For continued X-radiation protection, the replacement tube must be
the same type as the original, PIONEER approved type.
The picture tube (CRT Service Assy R, G, B) used in this set holds
complete guarantee against X-ray radiation when the X-ray is
sealed (next page ). Accordingly, when the current in flowing to the
picture tube (CRT Service Assy R, G, B), be sure to perform it by
putting the tube into X-ray sealed applied state. Avoid absolutely to
flow the current to the picture tube (CRT Service Assy R, G, B)
itself. Moreover, when the voltage of the high voltage circuit
becomes abnormally a little higher, the picture tube radiates X-rays.
Accordingly, when servicing the high voltage circuit be sure to
replace as an assy with the POWER SUPPLY Assy in the manner
in which has been adjusted to perform normal operation.
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
The use of a substitute replacement component which dose not
have the same safety characteristics as the PIONEER
recommended replacement one, shown in the parts list in this
Service Manual, may create shock, fire, X-radiation, or other
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.
1.2 PRODUCT SAFETY NOTICE