Sony XBR-55X900H Service Manual page 6

2021/04/27 23:25:57 (GMT+09:00)
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
※Substrate that needs attention for handling
・Main Board（B** - Board）
・Backend Board（D** - Board）
SAFETY NOTES SELF DIAGNOSTIC FUNCTION TROUBLESHOOTING
S A F E T Y N O T E S
※Things to prepare in advance
ESD wrist-strap
Please use a bag containing the board or a special seat
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)
SERVICE ADJUSTMENT
ESD cushion/sheet
DIAGRAM
6
HANDLING GUIDE
SYS SET