Sony XBR-55X900H Service Manual page 9

2021/04/27 23:25:57 (GMT+09:00)
③When holding board, do not hit/touch to Plastic part(s)
④After take defective board out from TV, put it into ESD bag.
Do not place on floor mat/carpet direct. And, always put it on
ESD cushion
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SAFETY NOTES SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING
S A F E T Y N O T E S
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.
SERVICE ADJUSTMENT DIAGRAM HANDLING GUIDE
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SYS SET