Sony KDL-40NX725 / KDL-46NX725 Service Manual ▷ View online
KDL-40NX725/46NX725
3
SECTION 1 - SAFETY AND FEATURES
HANDLING THE FFC CONNECTOR
Use caution when you connecting or removing the FFC connector.
Remove the connector by the reinforcement tab only.
1. Holding onto the reinforcement tab,
insert the FFC connector into the connector slot.
1. Gently press down on the release tab of the connector slot.
2. Holding onto the reinforcement tab of the FFC connector,
pull out the connector while continuing to hold down
the release tab of the connector slot.
(See caution below.)
Use the
tab to
insert
connector.
2
Press down
Main Board
Main Board
CAUTION: The FFC connector can be inserted into the Main Board upside down.
If it is inserted upside down, the pins on the FFC connector
will short-circuit and damage the board.
Reinforcement tab shows
Terminal side shows
Use the
tab to
remove
connector.
Inserted Correctly
Inserted Incorrectly
Correct
Incorrect
DISCONNECTING THE FFC CONNECTOR
CONNECTING THE FFC CONNECTOR
KDL-40NX725/46NX725
4
SECTION 1 - SAFETY AND FEATURES
SPECIAL HANDLING INSTRUCTIONS WHEN REPLACING THE LCD PANEL ASSEMBLY
Use the following precautionary guidelines when handling the LCD Panel Assembly to avoid material degradation or screen coating degradation,
and ensure that dust, dirt, or fingerprints are not left between the glass and the LCD Panel Assembly.
1. After removing the boards and connectors, note where the frame is on the panel. (Figure 1)
2. Lift the LCD Panel Assembly by holding the top and bottom of the panel approximately 200mm from the edge with your palms
on the back of the panel. (Figure 2)
CAUTION: Lifting or holding the panel at the corners may damage the panel.
3. Use the same method when taking the replacement panel out of the carton. (Figure 3)
Figure 1
Figure 2
Figure 3
CAUTION: DO NOT lift the LCD Panel by holding the short side of the panel or by placing your palms on the front glass. (Figures 4 & 5)
Figure 4
Figure 5
KDL-40NX725/46NX725
5
SECTION 1 - SAFETY AND FEATURES
SAFETY-RELATED WARNINGS
USE CAUTION WHEN HANDLING THE LCD PANEL
When repairing the LCD panel, be sure you are grounded by using a wrist band.
When installing the LCD panel on a wall, the LCD panel must be secured using the 4 mounting holes on the rear cover.
When installing the LCD panel on a wall, the LCD panel must be secured using the 4 mounting holes on the rear cover.
1. Do not press on 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 temperatures 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 a short circuit within the module.
6. Disconnect the AC power when replacing the backlight 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.
9. Protect the panel from ESD to avoid damaging the electronic circuit (C-MOS).
10. During the repair,
DO NOT leave the Power On for more than 1 hour while the TV is face down on a cloth
.
KDL-40NX725/46NX725
6
SECTION 1 - SAFETY AND FEATURES
SAFETY CHECK-OUT
After correcting the original service problem, perform the following safety checks before releasing the set to the customer:
1. Check the area of your repair for unsoldered or poorly soldered connections. Check the entire board surface for solder
splashes and bridges.
2. Check the interboard wiring to ensure that no wires are “pinched” or touching high-wattage resistors.
3. Check that all control knobs, shields, covers, ground straps, and mounting hardware have been replaced. Be absolutely
certain that you have replaced all the insulators.
4. Look for unauthorized replacement parts, particularly transistors, that were installed during a previous repair. Point them out
to the customer and recommend their replacement.
5. Look for parts which, though functioning, show obvious signs of deterioration. Point them out to the customer and
recommend their replacement.
6. Check the line cords for cracks and abrasion. Recommend the replacement of any such line cord to the customer.
7. Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
Click on the first or last page to see other KDL-40NX725 / KDL-46NX725 service manuals if exist.