Toshiba 40LV933G Service Manual page 20

TOSHIBA
and may be hazardous.
9. NEVER remodel the product in any way. Remodeling can result in improper operation,
malfunction, or electrical leakage and flame, which may be hazardous.
10. Touch current check. (After completing the work, measure touch current to prevent an
electric shock.)
Plug the AC cord directly into the AC outlet. Do NOT use an isolation transformer for
this check.
Connect a measuring network for touch currents between each exposed metallic part on
the set and a good earth ground such as a water pipe.
Resistance values in orms ( ).
V: Voltmeter or oscilloscope
(r.m.s. or peak reading)
Note: Appropriate measures should be taken to obtain the correct value in case of
non sinusoidal waveforms.
The measuring instrument is calibrated by comparing the frequency factor of
the solid line in figure F.2 of IEC 60990 at various frequencies. A calibration curve is
constructed showing the deviation of
frequency.
TOUCH CURRENT =
The potential at any point (TOUCH CURRENT) expressed as voltage
not exceed the following value:
The part or contact of a TERMINAL is not HAZARDOUS LIVE if:
file://D:\Documents and Settings\Admin\Рабочий стол\TOSHIBA 40LV933G\40LV...
Measuring network for TOUCH CURRENTS
Input resistance : 1 M
Input capacitance : 200 pF
Frequency range : 15 Hz to 1 MHz and d.c. respectively
/ 500 (peak value).
Annex D
(normative)
from the ideal curve as a function of
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with
and does
20.04.2015