Read Sharp PN-E702 (serv.man11) Technical Bulletin online
IDP 2014 09 09
Date of Issue:11
th
September 2014
Classification:
Yellow
IDP TECHNICAL BULLETIN
Page 3 of 3
Sharp Electronics (UK) Limited
Reference
– PNF-A324
Revision - 1
White
– Carry out as required
Yellow
– Carry out as required and whenever the unit comes in for service
Red
– Carry out on all units
Cause
The parts with different rate of thermal expansion was impregnated together and
attached during the manufacture of transformer for the LED output circuit (T7701 and
T7702) on the Power Supply unit. The stress due to this difference generated crack(s)
on the core.
The parts with different rate of thermal expansion was impregnated together and
attached during the manufacture of transformer for the LED output circuit (T7701 and
T7702) on the Power Supply unit. The stress due to this difference generated crack(s)
on the core.
Countermeasure
The manufacturing process of the transformer (impregnation method of the coil) has
been improved to avoid stress.
The manufacturing process of the transformer (impregnation method of the coil) has
been improved to avoid stress.
How to distinguish old and new Power Supply unit
You can distinguish the Power Supply unit before and after change according to the
black marking and date code on the spec label.
You can distinguish the Power Supply unit before and after change according to the
black marking and date code on the spec label.
