Service Manuals, User Guides, Schematic Diagrams or docs for : LG TV 32FS4D chassis CD61A 32FS4D Service Manual

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

COLOR TV
SERVICE MANUAL
CHASSIS : CD61A

MODEL : 32FS4D
MODEL : 32FS4D-TE
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CONTENTS

CONTENTS .............................................................................................. 2

SAFETY PRECAUTIONS ..........................................................................3

CONTROL DESCRIPTIONS .................................................................... 4

SPECIFICATIONS .................................................................................... 7

ADJUSTMENT INSTRUCTIONS ............................................................. 8

TROUBLE SHOOTING .......................................................................... 17

PRINTED CIRCUIT BOARD ....................................................................20

BLOCK DIAGRAM ..................................................................................27

EXPLODED VIEW ...................................................................................28

EXPLODED VIEW PARTS LIST ..............................................................29

REPLACEMENT PARTS LIST ................................................................30

SVC. Sheet ..................................................................................................
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 Isolation Transformer should always be used during always perform an AC leakage current check on the
the servicing of a receiver whose chassis is not isolated from exposed metallic parts of the cabinet, such as antennas,
the AC power line. Use a transformer of adequate power rating terminals, etc., to be sure the set is safe to operate without
as this protects the technician from accidents resulting in damage of 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 circuitry 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 position, 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 exposed 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 specified, 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 1.5KV: 14-19 inch, 26 1.5KV: 19-21 inch,
29.0 1.5KV: 25-29 inch, 30.0 1.5KV: 32 inch
If the meter indication is out of tolerance, immediate service Good Earth Ground
and correction is required to prevent the possibility of such as WATER PIPE,
CONDUIT etc.
premature component failure. To Instrument's 0.15uF
exposed
METALLIC PARTS

1.5 Kohm/10W
CONTROL DESCRIPTIONS

All the functions can be controlled with the remote control hand-
set. Some functions can also be adjusted with the buttons on the
front panel of the set.

Remote control handset
Before you use the remote control handset, please install the bat-
1 teries. See the next page.
2 D/A POWER TV
1. POWER
3 INPUT DVD Switches the set on from standby or off to standby.
4 ARC VCR 2. D/A (Digital TV / Analogue TV)
Selects digital or analogue mode.
5 SLEEP GUIDE MULTI INFO Switches the set on from standby.
6
3. INPUT
External input modes rotate in regular sequence: Digital,
Analogue, AV1-3, Component 1-2, HDMI/DVI.
Switches the set on from standby.
7 4. ARC (Aspect Ratio Control)
LIST
MENU
I/II Selects your desired picture format.
8 EXIT FAV
9 5. SLEEP
Sets the sleep timer.

10 OK 6. GUIDE
Shows a programme schedule.
7. MENU
Selects a menu.
Q.VIEW
8. LIST
11 VOL PR
Displays the programme table.
MUTE
9. EXIT
12 Clears all on-screen displays and returns to TV viewing from
1 2 3 any menu.
13 4 5 6 10. OK
Accepts your selection or displays the current mode.
7 8 9 D / E or F / G
Adjusts menu settings.
14 PSM 0 SSM Selects menu item.
11. VOL +/- (Volume Up/Down)
TEXT UPDATE INDEX Increases/decreases sound level.
15 HOLD SIZE MIX 12. Q.VIEW
TIME
?

REVEAL
Returns to the previously viewed programme.
13. NUMBER BUTTONS
Switches the set on from standby or directly select a number.
14. PSM (Picture Status Memory)
Recalls your preferred picture setting.
15. TELETEXT BUTTONS
These buttons are used for teletext.
For further details, see the `Teletext' section.
Text button is used to enable teletext services while other but-
tons are for teletext functions.
16. TV, DVD, VCR
Selects the remote operating mode: TV, VCR, DVD. Select other
operating modes, for the remote to operate external devices.
17. +/-
Adjusts brightness on screen.
It returns to the default settings brightness by changing mode source.
18. INFO D/A POWER TV 16
Shows the present screen information.
INPUT DVD
19. MULTI
ARC VCR
Selects the Component 1-2 or HDMI/DVI modes.
17
20. COLOURED BUTTONS SLEEP GUIDE MULTI INFO 18
They are used as per the indications or functions displayed on 19
the TV screen in the case of Text displays (Teletext, EPG) and 20
programme edit.
21. VCR/DVD control buttons 21
Control some video cassette recorders or DVD players
("RECORD" button is not available for DVD player). LIST I/II
MENU
22. I/II EXIT FAV
22
Selects the language during dual language broadcast. 23
Selects the sound output or the audio mode.
OK
23. FAV (FAVOURITE)
Displays the selected favourite programmes.

24. PR +/- (Programme Up/Down)
Q.VIEW
Selects a programme. VOL PR 24
Switches the set on from standby.
MUTE

25. MUTE
Switches the sound on or off. 25
1 2 3
26. SSM (Sound Status Memory)
Recalls your preferred sound setting. 4 5 6

7 8 9

PSM 0 SSM 26

TEXT UPDATE INDEX

HOLD SIZE MIX
?

TIME REVEAL
Front panel

S-VIDEO
MENU

VIDEO
L/MONO AUDIO R
VOL
4 6
PR AV IN3

1
ON/OFF

Side panel
2 5

1. MAIN POWER (ON/OFF) 5. REMOTE CONTROL SENSOR
Switches the set on or off.
6. AUDIO/VIDEO IN SOCKETS (AV IN3)
2. POWER/STANDBY INDICATOR Connect the audio/video out sockets of exter-
illuminates brightly when the set is in standby nal equipment to these sockets.
mode. S-VIDEO/AUDIO IN SOCKETS (S-AV)
Dims when the set is switched on. Connect the video out socket of an S-VIDEO
VCR to the S-VIDEO socket.
3. MENU Connect the audio out sockets of the S-
Selects a menu. VIDEO VCR to the audio sockets as in AV
IN3.
4. OK
Accepts your selection or displays the current
mode.
F / G (Volume Down/Up)
Adjusts the volume.
Adjusts menu settings.
D / E (Programme Up/Down)
Selects a programme or a menu item.
Switches the set on from standby.
SPECIFICATIONS
Note : Specification and others are subject to change without notice for improvement.

A Scope A Test Condition
This specification can be applied to all the television related to 1) Temperature : 25

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