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10) During the repair, DO NOT leave the Power On or Burn-in period for
more than 1 hour while the TV is face down on a cloth. Refer Figure 1.
Figure 1.
1-3. Caution_for_Board_handling
Symptom : The following problems will occur due to handling of the IC
mounted on the board.
・ Solder crack due to substrate handling (stress)
・ IC breakdown due to static electricity (ESD)
When repairing the TV at the customer's home or service station or
Repair of defect board, please pay attention to the handling of the board.
SDM-U27M90
1-4. Caution About the Lithium Battery
1) Danger of explosion if battery is incorrectly replaced. Replace only
with the same or equivalent type.
2) Outer case broken battery should not contact to water.
1-5. Safety Check-Out
After correcting the original service problem, perform the following
safety checks before releasing the set to the customer:-
1) Check the area of your repair for unsoldered or poorly soldered
connections. Check the entire board surface for solder splashes and
bridges.
2) Check the inter board wiring to ensure that no wires are pinched or
contact high-wattage resistors.
3) Check all control knobs, shields, covers, ground straps and mounting
hardware have been replaced. Be absolutely certain you have replaced
all the insulators.
4) Look for unauthorized replacement parts, particularly transistors that
were installed during a previous repair. Point them out to the customer
and recommend their replacement.
5) Look for parts which, though functioning show obvious signs of
deterioration. Point them out to the customer and recommend their
replacement.
6) Check the line cords for cracks and abrasion. Recommend the
replacement of any such line cord to the customer.
7) Check the antenna terminals, metal trim, metalized knobs, screws and
all other exposed metal parts for AC leakage. Check leakage test as
described next.
8) For safety reasons, repairing the Power board and/or Inverter board is
prohibited.
SAFETY NOTE
4
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