Sylvania 6842THG, Руководство по обслуживанию, Страница: 92 / 123

2-1-1 PZ3PDMPR
PRECAUTIONS
** To prevent the risks of unit damage, electrical shock and radiation, take the following safety, service,
and ESD precautions.
Handling Precautions for Plasma Display
– PDP module use high voltage that is dangerous to human. Before operating PDP, always check the dust to
prevent circuit short. Be careful touching the circuit device when power is on.
–
PDP module is sensitive to dust and
humidity. Therefore, assembling and disassembling must be done in no dust
place.
–
PDP module has a lot of electric
devices. Service engineer must wear equipment (for example, earth ring) to
prevent electric shock and working clothes to prevent electrostatic.
–
PDP module use a fine pitch connector
which is only working by exactly connecting with flat cable. Operator must
pay attention to a complete connection when connector is reconnected after repairing.
–
The capacitor’s remaining voltage in
the PDP module’s circuit board temporarily remains after power is off.
Operator must wait for discharging of remaining voltage during at least 1 minute.
Safety Precautions for Service (Handling, prevention of a electrical shock,
measure against power outage, etc.)
(Safety Precautions)
– Before replacing a board, discharge forcibly The remaining electricity from board.
– When connecting FFC and TCPs to the module, recheck that they are perfectly connected.
– To prevent electrical shock, be careful not to touch leads during circuit operations.
– To prevent the Logic circuit from being damaged due to wrong working, do not connect/disconnect signal
cables during circuit operations.
– Do thoroughly adjustment of a voltage label and voltage-insulation.
– Before reinstalling the chassis and the chassis assembly, be sure to use all protective stuffs including a
nonmetal controlling handle and the covering of partitioning type.
– Caution for design change: Do not install any additional devices to the module, and do not change the
electrical circuit design.
– For example: Do not insert a subsidiary audio or video connector. If you insert It, It cause danger on safety.
And, If you change the design or insert, Manufacture guarantee will be not effect.
– If any parts of wire is overheats of damaged, replace it with a new specified one immediately, and identify the
cause of the problem and remove the possible dangerous factors.
– Examine carefully the cable status if it is twisted or damaged or displaced. Do not change the space between
parts and circuit board. Check the cord of AC power preparing damage.
– Product Safety Mark: Some of electric or implement material have special characteristics invisible that was
related on safety. In case of the parts are changed with new one, even though the Voltage and Watt is higher
than before, the Safety and Protection function will be lost.
– The AC power always should be turned off, before next repair.
– Check assembly condition of screw, parts and wire arrangement after repairing. Check whether the material
around the parts get damaged.
(Precaution when repairing ESD)
– There is ESD which is easily damaged by electrostatics. (for example Integrated circuit, FET) Electrostatic
damage rate of product will be reduced by the following technics
– Before handling semiconductor parts/assembly, must remove positive electric by ground connection, or must
wear the antistatic wrist-belt and ring. (It must be operated after removing dust on it – It comes under
precaution of electric shock.)
– After removing ESD assembly, put on it with aluminum stuff on the conductive surface to prevent charging.
– Do not use chemical stuff using Freon. It generates positive electric that can damage ESD.