Sony BRAVIA KD-55A9F, Service Manual

Page: 5 / 123

5
SECTION 1
SAFETY NOTES
Whenever a TV Main board is replaced, the correct TV Model and Serial
number must be reinserted into memory.
This is a MANDATORY procedure that each service center must apply.
Please refer to the chapter of ADJUSTMENT in this service manual to
find out how to set the model number and serial number in service mode.
1-2-1. 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 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 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.
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.
Damaging the wires may cause a short circuit.
9) Protect the panel from ESD to avoid damaging the electronic circuit
(C-MOS).
1-1. Warnings and Caution
1) CAUTION : 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
that contained in the operating instructions unless you are qualified to do so.
3) WARNING!! : 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.
The replaceable fuse could be in the neutral of the mains supply. When
replacing the fuse, the mains shall be disconnected for de-energize the phase
conductors.
(*Except AC ADAPTOR, Because it does not carry out replacing an internal
fuse.)
4) CARRYING THE TV : 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.
• Correct hand placement while carrying the TV is very important for
safety and to avoid damages.
5) SAFETY-RELATED COMPONENT WARNING!! : 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 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.
6) IMPORTANT REMINDER FOR TV MAINBOARD REPLACEMENT :
It is mandatory for service centers to confirm the TV‘s system information after
each repair carried out with Mainboard replacement.
SYS SET
2018/09/19 04:47:37 (GMT+09:00)