Sony KDL-24EX520 / KDL-32EX420 / KDL-32EX520 / KDL-40EX520 / KDL-46EX520 Service Manual ▷ View online
KDL-32EX420, 24/32/40/46EX520(CH)
5
WARNINGS AND CAUTIONS
USE CAUTION WHEN HANDLING THE LCD PANEL
When repairing the LCD panel, be sure you are grounded by using a wrist band.
When repairing the LCD panel on the 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 (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.
9)
Protect the panel from ESD to avoid damaging the electronic circuit (C-MOS).
10)
It is recommended not to exceed 1 hour of Power-On nor Burn-in period with LCD panel face down condition, in repair activity.
KDL-32EX420, 24/32/40/46EX520(CH)
6
When you insert / pull out FFC, please grasp a reinforcement board and main body of FFC.
<GOOD>
<NG>
< Insertion >
Please hold reinforcement board and plunge it to the depths.
Please pull out FFC while pushing the upper button
at the same time.
at the same time.
Reinforce
plate
plate
B board
2
1
Push!!
B board
FFC can reverse insertion to connector of B board.
If reverse insertion FFC, all pins short-circuit, and board is broken.
If reverse insertion FFC, all pins short-circuit, and board is broken.
Upper side is GND shield
Upper side is terminal
<Pull out>
HANDLING THE FFC
WARNINGS AND CAUTIONS
Reinforce
plate
plate
<GOOD>
<NG>
KDL-32EX420, 24/32/40/46EX520(CH)
7
Be sure to connect the cables, etc., before installing the wall mount bracket (SU-WL50B), since the clearance between the terminal and the wall mount bracket (arm portion)
will only be about 40 mm (after the installation).
will only be about 40 mm (after the installation).
BEFORE INSTALLING THE WALL MOUNT BRACKET (SU-WL50B)
WARNINGS AND CAUTIONS
Terminal ~ Arm = 41.5mm
Terminal
Arm of Wall mount bracket
Wall~Arm:20.8mm
Arm
KDL-32EX420, 24/32/40/46EX520(CH)
8
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.
8. For safety reasons, repairing the Power board and/or Inverter board is prohibited.
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