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.
1-1. 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 stated 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 should be in the neutral of the mains supply. When replacing the fuse,
the mains must be disconnected to 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 operations. 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 operations are
identified in this manual. Follow these procedures whenever critical components are replaced
or improper operation is suspected.
6) IMPORTANT REMINDER FOR TV MAIN BOARD REPLACEMENT:
It is mandatory for service centers to confirm the TV‘s system information after each repair is
carried out with Main board replacement.
4
SAFETY NOTES
