Read Sharp LC-28HM2E (serv.man2) Service Manual online
to its original condition and only parts identical to those specified should be used.
have special safety-related characteristics.
These characteristics are often not evident from visual
inspection, nor can protection afforded by them be
necessarily increased by using replacement components
rated for higher voltage, wattage and etc.
Replacement parts which have these special safety
characteristics are identified in this manual; electrical
components having such features are identified by “
For continued protection, replacement parts must be
identical to those used in the original circuit.
The use of a substitute replacement parts which do not
have the same safety characteristics as the factory
recommended replacement parts shown in this service
manual, may create shock, fire or other hazards.
AGAINST A RISK OF FIRE REPLACE ONLY WITH
SAME TYPE FUSE. F1 (T1.6A, TR5-T), F1 (T2.5A,
250V, TR-5), F1 (T3.15A, TR5-T), F2 (T3.15A, TR5-
T), F3 (T2A, TR5-T), F4 (T2A, TR5-T), F6 (T1A, TR5-
T), F7 (T1A, TR5-T), F8 (P110A, 117C), F704 (2A,
250V), F705 (2A, 250V) FUSE.
(Fire & Shock Hazard)
the following safety checks:
between the chassis and other metal parts in the
adjustment and compartment covers or shields,
isolation resistor-capacitor networks, mechanical
insulators and etc.
and connect the DC power cable into the receiver's
DC jack. (Do not use an isolation transformer for this
resistor paralleled by a 0.15µF capacitor in series
with all exposed metal cabinet parts and a known
earth ground, such as electrical conduit or electrical
ground connected to an earth ground.
or higher, sensitivity or measure the AC voltage drop
across the resisor.
parts having a return to the chassis (antenna, metal
cabinet, screw heads, knobs and control shafts,
escutcheon and etc.) and measure the AC voltage
drop across the resistor.
All checks must be repeated with the AC cord plug
connection reversed. (If necessary, a nonpolarized
adaptor plug must be used only for the purpose of
completing these checks.)
Any reading of 35V peak (this corresponds to 0.7
milliamp. peak AC.) or more is excessive and
indicates a potential shock hazard which must be
corrected before returning the monitor to the owner.
oughly familiar with all safety checks and the servicing guidelines which follow:
for the optional