Sony KLV-20G300A Service Manual ▷ View online
5
KLV-20G300A
WARNINGS AND CAUTIONS
CAUTION
These servicing instructions are for use by quali ed 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 quali ed to do so.
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.
SAFETY-RELATED COMPONENT WARNING!!
Replace all components with Sony parts whose part numbers appear as shown in this manual or in supplements
published by Sony.
ATTENTION!!
Ces instructions de service sont à l’usage du personnel de service quali é seulement. Pour prévenir le risque de choc électrique, ne
pas faire l’entretien autre que celui contenu dans le Mode d’emploi à moins que vous soyez quali é faire ainsi.
A n d’eviter tout risque d’electrocution provenant d’un chássis sous tension, un transformateur d’isolement doit etre utilisé lors de tout
dépannage. Le chássis de ce récepteur est directement raccordé à l’alimentation du secteur.
ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!
Remplacer tout les composants par des composants Sony dont le numero de piece est indique dans le present manuel ou dans des
supplements publies par Sony.
6
KLV-20G300A
SAFETY-RELATED COMPONENT WARNING
It is essential that all critical parts be replaced only with thepart number specified in the electrical parts list to prevent electric shock,
re, or other hazard.
NOTE: Do not modify the original design without obtaining written permission from the manufacturer or you will void the original parts and
labor guarantee.
USE CAUTION WHEN HANDLING THE LCD PANEL
When repairing the LCD panel, be sure you are grounded by using a wrist band.
To avoid damaging the LCD panel:
do not press on the panel or frame edge to avoid the risk of electric shock.
do not scratch or press on the panel with any sharp objects.
do not leave the module in high temperatures or in areas of high humidity for an extended period of time.
do not expose the LCD panel to direct sunlight.
avoid contact with water. It may cause a short circuit within the module.
disconnect the AC power when replacing the backlight (CCFL) or inverter circuit.
(High voltage occurs at the inverter circuit at 650Vrms.)
always clean the LCD panel with a soft cloth material.
use care when handling the wires or connectors of the inverter circuit. Damaging the wires may cause a short.
protect the panel from ESD to avoid damaging the electronic circuit (C-MOS).
LEAKAGE CURRENT HOT CHECK CIRCUIT
AC Volt-meter
Good Earth Ground
Such as WATER PIPE,
CONDUIT etc.
Such as WATER PIPE,
CONDUIT etc.
1.5 Kohm / 10W
To Instruments
exposed
METALLIC PARTS
exposed
METALLIC PARTS
AC Volt-meter
Good Earth Ground
Such as WATER PIPE,
CONDUIT etc.
Such as WATER PIPE,
CONDUIT etc.
1.5 Kohm / 10W
To Instruments
exposed
METALLIC PARTS
exposed
METALLIC PARTS
7
KLV-20G300A
The circuit boards used in these models have been processed using
Lead Free Solder.
The servicing of these boards requires special precautions to be taken
as outlined below.
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 the higher 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
8
KLV-20G300A
Click on the first or last page to see other KLV-20G300A service manuals if exist.