Sony XR-55X90K Service Manual page 5

SAFETY NOTES
10) During the repair, DO NOT leave the POWER ON or Burn-in period for more
than 1 hour while the TV is facing down on a cloth. Refer Figure 1.
1-3. Caution_for_Board_handling.
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.
Substrate that needs attention for handling :
• Main Board（B** Board）
• Backend Board（D** Board）
Figure 1.
※Things to prepare in advance.
ESD wrist-strap.
※Caution: ESD wrist-strap to be checked daily.
Use Multi-meter to make sure resistance of ESD wrist-strap is OK.
(R=750K Ohms to 35Mega Ohms)
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