Sony KDL-40NX720 / KDL-40NX723 / KDL-46NX720 / KDL-46NX723 / KDL-55NX720 / KDL-55NX723 / KDL-60NX720 / KDL-60NX723 Service Manual ▷ View online
Safety Notes
KDL- 40, 46, 55, 60 NX720
RM-GD019
KDL- 40, 46, 55, 60 NX723
RM-GD019
1-4. How to Find a Good Earth Ground
A cold-water pipe is a guaranteed earth ground; the cover-plate retaining screw
on most AC outlet boxes is also at earth ground.
If the retaining screw is to be used as your earth ground, verify that it is at ground
by measuring the resistance between it and a cold-water pipe with an ohmmeter.
The reading should be zero ohms
c) 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.
The reading should be zero ohms.
If a cold-water pipe is not accessible, connect a 60- to 100-watt trouble- light (not
a neon lamp) between the hot side of the receptacle and the retaining screw. Try
both slots, if necessary, to locate the hot side on the line; the lamp should light at
normal brilliance if the screw is at ground potential (see Figure B).
• Correct hand placement while carrying the TV is very important for safety
and to avoid damages.
d) Components identified by shading and ! mark on the schematic diagrams,
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
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.
1-6. Lead Free Information
The circuit boards used in these models have been processed using Lead Free
Solder. The boards are identified by the LF logo located close to the board
designation.
Figure 3. Checking for earth ground.
1-5. Warnings and Caution
Figure 2: LF
Logo
a) These servicing instructions are for use by qualified service personnel only.
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.
b) 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.
Figure 3: LF logo on circuit board
-4-
Safety Notes
KDL- 40, 46, 55, 60 NX720
RM-GD019
KDL- 40, 46, 55, 60 NX723
RM-GD019
The servicing of these boards requires special precautions. It is strongly
recommended to use Lead Free Solder material in order to guarantee optimal
quality of new solder joints. Lead Free Solder is available under the following
part numbers:-
FFC can reverse insertion to connector of B board.
If reverse insertion FFC, all pins short-circuit, and board is broken.
Part Number
Diameter
Remarks
7-640-005-19
0.3mm
0.25Kg
7-640-005-20
0.4mm
0.50Kg
7-640-005-21
0.5mm
0.50Kg
7-640-005-22
0.6mm
0.25Kg
7-640-005-23
0.8mm
1.00Kg
Due to high melting point of Lead Free Solder, the soldering iron tip
7-640-005-24
1.0mm
1.00Kg
7-640-005-25
1.2mm
1.00Kg
7-640-005-26
1.6mm
1.00Kg
< Insertion>
g
g
g
temperature needs to be set to 370 degrees centigrade. This requires
soldering equipment capable of accurate temperature control coupled
with a good heat recovery characteristics.
For more information on the use of Lead Free Solder,
please refer to
http://www.sony-training.com
1-7. Handling the FLEXIBLE FLAT CABLE (FFC)
When you insert / pull out FFC, please grasp a reinforcement board
and main body of FFC.
<Pull out>
-5-
1-8. How to release COVER AC (Service and repair information)
Safety Notes
KDL- 40, 46, 55, 60 NX720
RM-GD019
KDL- 40, 46, 55, 60 NX723
RM-GD019
1. Remove screw for Rear Cover and “COVER AC”.
( Refer Section 6 for screw information).
3. Release AC cable connector.
2. Open Rear Cover with “COVER AC” and AC cable are attached.
Make sure to hold cable not to give any tension to connector
and scratch damage for cable.
4. Release hook of “COVER AC” and remove it.
Note:
Note:
Take care not to cut your hand when release hook, especially metal Rear Cover.
Confirm if the hook broken before reuse COVER AC.
In case hook broken is occurred, replace with new one.
-6-
Safety Notes
1-9. Information on Frenel Lens
KDL- 40, 46, 55, 60 NX720
RM-GD019
KDL- 40, 46, 55, 60 NX723
RM-GD019
2. Please release fixed screws to looseness the NECK.
3 Please release last screws with looseness condition of other screws
1-10. Attachment method Neck to Stand Base
3. Please release last screws with looseness condition of other screws
-7-
1. Neck, Base, Screw Area Image
4. Please fix all screws properly if you could attach last screws.
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