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COLOR TV
SERVICE MANUAL
CHASSIS : MC-035E
MODEL : 32FS2RMB/RNB
32FS2RMB/RNB-TP
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 .......................................................................... 15
PRINTED CIRCUIT BOARD ....................................................................20
BLOCK DIAGRAM ................................................................................. 25
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 handset.
Some functions can also be adjusted with the buttons on the front
panel of the set.
Remote control handset
POWER Before you use the remote control handset, please install the bat-
1 teries. See the next page.
EYE/ TV/AV 1. POWER
2 TURBO switches the set on from standby or off to standby.
SOUND PICTURE
3 2. EYE/ (option)
PIP TEXT *
switches the eye function on or off.
4
PR - PR + 3. TURBO SOUND BUTTON
selects Turbo sound.
SWAP INPUT
4. PIP BUTTONS (option)
MENU PR MUTE PIP
5 switches the sub picture on or off.
PR +/-
selects a programme for the sub picture.
OK
SWAP
VOL VOL
alternates between main and sub picture.
6 INPUT
selects the input mode for the sub picture.
SIZE
adjusts the sub picture size.
STILL
PR
freezes motion of the sub picture.
1 2 3
POSITION
relocates the sub picture in clockwise direction.
4 5 6
5. MENU
7 selects a menu.
7 8 9
6. D / E (Programme Up/Down)
PSM 0 SSM selects a programme or a menu item.
8 switches the set on from standby.
9 I/II SLEEP L IS T
F / G (Volume Up/Down)
10 adjusts the volume.
MAIN STILL INDEX FAVOURITE
11 adjusts menu settings.
REC STOP Q.VIEW OK
accepts your selection or displays the current mode.
12 REW PLAY FF
7. NUMBER BUTTONS
SIZE STILL ARC switches the set on from standby or directly select a number.
POSITION MIX
8. PSM (Picture Status Memory)
recalls your preferred picture setting.
TIME REVEAL ? MODE M
9. SLEEP
sets the sleep timer.
10. I/II
selects the language during dual language broadcast.
selects the sound output (option).
11. MAIN STILL
freezes motion of the picture.
12. VCR BUTTONS
control a LG video cassette recorder.
13. TV/AV
selects TV or AV mode.
switches the set on from standby.
14. TURBO PICTURE BUTTON
selects Turbo picture. POWER
15. TELETEXT BUTTONS (option)
These buttons are used for teletext. EYE/ TV/AV
13
For further details, see the `Teletext' section. TURBO
SOUND PICTURE
14
16. MUTE
PIP TEXT
switches the sound on or off. 15
PR - PR +
17. SSM (Sound Status Memory)
recalls your preferred sound setting. SWAP INPUT
18. LIST MENU PR MUTE
displays the programme table. 16
19. INDEX (option)
switches LED DISPLAY on or off. VOL OK
VOL
20. FAVOURITE
selects a favourite programme.
21. Q.VIEW
returns to the previously viewed programme.
PR
22. ARC (Aspect Ratio Control)
1 2 3
changes the picture format.
4 5 6
: No function
* 7 8 9
COLOURED BUTTONS : These buttons are used for teletext (only
TELETEXT models) or programme edit. PSM 0 SSM
17
I/II SLEEP LI S T
18
MAIN STILL INDEX FAVOURITE 19
20
REC STOP Q .V IE W
21
REW PLAY FF
SIZE STILL ARC
22
POSITION MIX
TIME REVEAL ? MODE M
Front panel
8
S-VIDEO
3
VIDEO
4 6
L/MONO AUDIO R
ON/OFF
AV3
1
PC INPUT
9
25 7
Side panel
1. MAIN POWER (ON/OFF) 6. AUDIO/VIDEO IN SOCKETS (AV3)
switches the set on or off. Connect the audio/video out sockets of
external equipment to these sockets.
2. POWER/STANDBY INDICATOR S-VIDEO/AUDIO IN SOCKETS (S-AV)
illuminates brightly when the set is in standby Connect the video out socket of an S-VIDEO
mode. VCR to the S-VIDEO socket.
dims when the set is switched on. Connect the audio out sockets of the S-
VIDEO VCR to the audio sockets as in AV3.
3. MENU
selects a menu. 7. EYE (option)
adjusts picture according to the surrounding
4. OK conditions.
accepts your selection or displays the current
mode. 8. HEADPHONE SOCKET
F / G (Volume Down/Up) Connect the headphone plug to this socket.
adjusts the volume.
adjusts menu settings. 9. PC INPUT SOCKET (option)
D / E (Programme Up/Down) Connect the monitor output socket of the
selects a programme or a menu item. PERSONAL COMPUTER to this socket.
switches the set on from standby. Note : Set the resolution of PC to VGA
640x480 (60 Hz) video mode to use this set
5. REMOTE CONTROL SENSOR as PC monitor.
SPECIFICATIONS
Note : Specification and others are subject to change without notice for improvement.
V Application Range V Feature and Function
This specification can be applied to all the television related to No. Item Specification
MC-035E Chassis.
1 Teletext TOP,FLOF
2 REMOCON LG code
V Specification 3 AV input 4(Side:1, Rear:3)
Each part is tested as below without special appointment. 4 Component input 2(Rear:option)
1) Temperature : 25