Sony BRAVIA KDL-55W900A, Service Manual, Page: 5 / 241

SAFETY NOTES
SECTION 1
RB1G
CHASSIS
W900A/904A/905A
1-2. Caution Handling of LCD Panel
When repairing the LCD Panel, make sure you are grounded with a wrist band.
When repairing the LCD Panel on the wall, the panel must be secured using the
1-1. Warnings and Caution
1) These servicing instructions are for use by qualified service personnel only.
2) To reduce the risk of electric shock, do not perform any servicing other than
4 mounting holes on the rear cover.
1) Do not press the panel or frame edge to avoid the risk of electric shock.
2) Do not scratch or press on the panel with any sharp objects.
3) Do not leave the module in high temperature or in areas of high humidity for
that contained in the operating instructions unless you are qualified to do so.
3) An isolation transformer should be used during any service to avoid
Possible shock hazard, because of live chassis. The chassis of this receiver is
directly connected to the ac power line.
3) Do not leave the module in high temperature or in areas of high humidity for
an extended period of time.
4) Do not expose the LCD panel to direct sunlight.
5) Avoid contact with water. It may cause short circuit within the module.
4) Be sure to follow these guidelines to protect your property and
avoid causing serious injury :
• Carry the TV with an adequate number of people; larger size TVs require
two or more people.
C t h d l t hil i th TV i i t t f
6) Disconnect the AC power when replacing the backlight (CCFL) or
inverter circuit. (High voltage occurs at the inverter circuit at 650Vrms)
7) Always clean the LCD panel with a soft cloth material.
8) Use care when handling the wires or connectors of the inverter circuit
• Correct hand placement while carrying the TV is very important for
safety and to avoid damages.
5) Components identified by shading and mark on the exploded views,
and in the parts list are critical for safe operation. Replace these
components with Sony parts whose part numbers appear as shown in this
!
8) Use care when handling the wires or connectors of the inverter circuit.
Damaging the wires may cause a short circuit.
9) Protect the panel from ESD to avoid damaging the electronic circuit (C-MOS).
10) During the repair, DO NOT leave the Power On or Burn-in period for more
components with Sony parts whose part numbers appear as shown in this
manual or in supplements published by Sony. Circuit adjustments that are
critical for safe operation are identified in this manual. Follow these
procedures whenever critical components are replaced or improper
operation is suspected.
than 1 hour while the TV is face down on a cloth.
operation is suspected.
Do not leave Power ON > 1 hour
5
Figure 1. TV is faced down on a cloth during repair.