– 3 –
KLV-22, 26, 32 EX300, 32, 40, 46 EX400
RM-GA019
1-1. Caution Handling of LCD Panel
When installing the LCD Panel, make sure you are grounded with a
wrist band.
When installing 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 adapter 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).
10)During repair, DO NOT leave on the Power On for more than 1
hour while the TV is face down on a cloth.
1-2. 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 contact high-wattage resistors.
3)Check all control knobs, shields, covers, ground straps and
mounting hardware have been replaced. Be absolutely certain 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 test as described next.
1-3. LeakageTest
The AC leakage from any exposed metal part to earth
ground and from all exposed metal parts to any exposed metal part
having a return to chassis must not exceed 0.5mA (500 microam-
peres). Leakage current can be measured by any one of the three
methods:-
1. A commercial leakage tester such as the SIMPSON 229 or RCA
WT-540A. Follow the manufacturers instructions to use those
instructions.
2. A battery-operated AC milliampmeter.The DATA
PRECISION 245 digital multimeter is suitable for this job.
3. Measuring the voltage drop across a resistor by means of a VOM
or battery operated AC voltmeter.The 'limit' indication is 0.75V so
analog meters must have an accurate low voltage scale.The
SIMPSON'S 250 and SANWA SH-63TRD are examples of passive
VOMs that are suitable. Nearly all battery operated digital multimeters
that have a 2 VAC range are suitable. (see Figure 1.)
1.5 k
1
0.15 µFAC
Voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
SECTION 1
SAFETY NOTES
Figure 1. AC voltmeter to check AC leakage
1-4.WARNING !
SAFETY-RELATED COMPONENT WARNING!
COMPONENTS IDENTIFIED BY SHADING AND MARK !ON THE
EXPLODED VIEWS ARE CRITICAL FOR SAFE OPERATION.
REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE
PARTNUMBERS 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.
1-5. 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.
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:-
Due to high melting point of Lead Free Solder, the soldering iron tip
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
rebmuntraPretemaiDskrameR
91-500-046-mm
m
m
m
m
m
m
m
3.0Kg52.0
02-500-046-7m4.0Kg05.0
12-500-046-7m5.0Kg05.0
22-500-046-7m6.0Kg52.0
32-500-046-7m8.0Kg00.1
42-500-046-7m0.1Kg00.1
52-500-046-7m2.1Kg00.1
62-500-046-7m6.1Kg00.1
7
Figure 2: LF logo
Figure 3: LF logo on circuit board
☛
>1 hour
