Service Manuals, User Guides, Schematic Diagrams or docs for : LG Beamer RL-JA10 lg_lcd_projector-rl-ja10

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                                                  website:http://biz.LGservice.com
                                  e-mail:http://www.LGEservice.com/techsup.html




LCD PROJECTOR
SERVICE MANUAL
CHASSIS : RE-01JA

MODEL : RL-JA10
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
                                                     CONTENTS



Contents ......................................................................................................................... 2

Safety Precautions .........................................................................................................3

Servicing Precautions ................................................................................................... 4

Control Descriptions ......................................................................................................6

Replacing of Lamp...........................................................................................................9

Adjustment Instructions ...............................................................................................10

Description of Micom ....................................................................................................15

Block Diagram................................................................................................................20

Exploded View ............................................................................................................. 24

Exploded View Parts List ..............................................................................................25

Replacement Parts List ................................................................................................26

SVC. Sheet .........................................................................................................................




                                                             - 2 -
                                           SAFETY PRECAUTIONS

                                          IMPORTANT SAFETY NOTICE
 Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in
 the 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.



General Guidance                                                    Before returning the receiver to the customer,

An lsolation Transformer should always be used during               always perform an AC leakage current check on the exposed
the servicing of a receiver whose chassis is not isolated from      metallic parts of the cabinet, such as antennas, terminals, etc.,
the AC power line. Use a transformer of adequate power rating       to be sure the set is safe to operate without damage of
as this protects the technician from accidents resulting in         electrical shock.
personal injury from electrical shocks.
                                                                    Leakage Current Cold Check(Antenna Cold Check)
It will also protect the receiver and it's components from being    With the instrument AC plug removed from AC source,
damaged by accidental shorts of the circuitary that may be          connect an electrical jumper across the two AC plug prongs.
inadvertently introduced during the service operation.              Place the AC switch in the on positioin, connect one lead of
                                                                    ohm-meter to the AC plug prongs tied together and touch other
If any fuse (or Fusible Resistor) in this TV receiver is blown,     ohm-meter lead in turn to each exposed metallic parts such as
replace it with the specified.                                      antenna terminals, phone jacks, etc.
                                                                    If the exposed metallic part has a return path to the chassis, the
When replacing a high wattage resistor (Oxide Metal Film            measured resistance should be between 1M and 5.2M.
Resistor, over 1W), keep the resistor 10mm away from PCB.           When the exposed metal has no return path to the chassis the
                                                                    reading must be infinite.
Keep wires away from high voltage or high temperature parts.        An other abnormality exists that must be corrected before the
                                                                    receiver is returned to the customer.
Due to high vacuum and large surface area of picture tube,
extreme care should be used in handling the Picture Tube.           Leakage Current Hot Check (See below Figure)
Do not lift the Picture tube by it's Neck.                          Plug the AC cord directly into the AC outlet.
                                                                    Do not use a line Isolation Transformer during this check.
X-RAY Radiation                                                     Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
                                                                    between a known good earth ground (Water Pipe, Conduit, etc.)
Warning:                                                            and the exposed metallic parts.
                                                                    Measure the AC voltage across the resistor using AC
 The source of X-RAY RADIATION in this TV receiver is the           voltmeter with 1000 ohms/volt or more sensitivity.
 High Voltage Section and the Picture Tube.                         Reverse plug the AC cord into the AC outlet and repeat AC
 For continued X-RAY RADIATION protection, the                      voltage measurements for each esposed metallic part. Any
 replacement tube must be the same type tube as specified in        voltage measured must not exceed 0.75 volt RMS which is
 the Replacement Parts List.                                        corresponds to 0.5mA.
                                                                    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.
To determine the presence of high voltage, use an accurate
high impedance HV meter.                                            Leakage Current Hot Check circuit

Adjust brightness, color, contrast controls to minimum.                                    AC Volt-meter
Measure the high voltage.
The meter reading should indicate
23.5 



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