Read LG 42PC5DC-UC / 42PC5DC-UL (CHASSIS:PA64A) Service Manual online
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Schematic Diagram and Replacement Parts List.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent
X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
servicing of a receiver whose chassis is not isolated from the AC
power line. Use a transformer of adequate power rating as this
protects the technician from accidents resulting in personal injury
from electrical shocks.
damaged by accidental shorts of the circuitary that may be
inadvertently introduced during the service operation.
with the same specified type.
over 1W), keep the resistor 10mm away from PCB.
electrical jumper across the two AC plug prongs. Place the AC
switch in the on positioin, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1MΩ and 5.2MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each esposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
In case any measurement is out of the limits sepcified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Digital TV Hotline 1-800-243-0000
such as WATER PIPE,
transformer will help protect test equipment.
(3) The adjustments must be performed in the circumstance of
there is no specific designation.
condition in EZ - Adjust)
Display the 100% Full White Pattern.
(2) AV Pattern Generator: 802F Pattern Generator, Master
(Which has NTSC-J Composite Video format output with
standard (1.0 Vpp) See Fig. 1)
=> MSPG-925FS Model No: 207 / Pattern No: 65 / NTSC-J
(3) Press INSTART key on R/C for adjustment.
(4) Press the
Digital pattern(13 CH), Cross Hatch Pattern), an afterimage
may occur in the black level part of the screen.