Orion 21MT9A User manual

SERVICE MANUAL
Design and specifications are subject to change without notice.
21MT9A
COLORTELEVISION RECEIVER
ORIGINAL
MFR’S VERSION B

The parts in this equipment have the specific
characters of incombustibility and withstand
voltage for safety. Therefore, the part which is
replaced should be used the part which has the
same character.
Especially as to the important parts for safety
which is indicated in the circuit diagram or the
table of parts as a mark, the designated parts
must be used.
SERVICING NOTICES ON CHECKING
6. AVOID AN X-RAY1. KEEP THE NOTICES
As for the places which need special attentions,
they are indicated with the labels or seals on the
cabinet, chassis and parts. Make sure to keep the
indications and notices in the operation manual.
2. AVOID AN ELECTRIC SHOCK
There is a high voltage part inside. Avoid an
electric shock while the electric current is flowing.
3. USE THE DESIGNATED PARTS
4. PUT PARTS AND WIRES IN THE
ORIGINAL POSITION AFTER
ASSEMBLING OR WIRING
There are parts which use the insulation material
such as a tube or tape for safety, or which are
assembled in the condition that these do not
contact with the printed board. The inside wiring is
designed not to get closer to the pyrogenic parts
and high voltage parts. Therefore, put these parts
in the original positions.
5. TAKE CARE TO DEAL WITH THE
CATHODE-RAY TUBE
In the condition that an explosion-proof cathode-
ray tube is set in this equipment, safety is secured
against implosion. However, when removing it or
serving from backward, it is dangerous to give a
shock. Take enough care to deal with it.
Safety is secured against an X-ray by consider-
ing about the cathode-ray tube and the high
voltage peripheral circuit, etc.
Therefore, when repairing the high voltage pe-
ripheral circuit, use the designated parts and
make sure not modify the circuit.
Repairing except indicates causes rising of high
voltage, and it emits an X-ray from the cathode-
ray tube.
7. PERFORM A SAFETY CHECK AFTER
SERVICING
Confirm that the screws, parts and wiring which
were removed in order to service are put in the
original positions, or whether there are the
portions which are deteriorated around the
serviced places serviced or not. Check the
insulation between the antenna terminal or
external metal and the AC cord plug blades.
And be sure the safety of that.
(INSULATION CHECK PROCEDURE)
1.
2.
3.
4.
Unplug the plug from the AC outlet.
Remove the antenna terminal on TV and turn
on the TV.
Insulation resistance between the cord plug
terminals and the eternal exposure metal
[Note 2] should be more than 1M ohm by
using the 500V insulation resistance meter
[Note 1].
If the insulation resistance is less than 1M
ohm, the inspection repair should be
required.
[Note 1]
If you have not the 500V insulation
resistance meter, use a Tester.
[Note 2]
External exposure metal: Antenna terminal
A1-1
HOW TO ORDER PARTS
Please include the following informations when you order parts. (Particularly the VERSION LETTER.)
1. MODEL NUMBER and VERSION LETTER
The MODEL NUMBER can be found on the back of each product and the VERSION LETTER can be
found at the end of the SERIAL NUMBER.
2. PART NO. and DESCRIPTION
You can find it in your SERVICE MANUAL.
IMPORTANT
Inferior silicon grease can damage IC's and transistors.
When replacing an IC's or transistors, use only specified silicon grease (YG6260M).
Remove all old silicon before applying new silicon.
• Hotel lock can be cancelled by following steps 1-2.
1.
2.
TO CANCEL HOTEL LOCK
Press and hold the CHANNEL UP button on the TV, and press the POWER button on the remote
control simultaneously.
Press the SET +/– button to select the HOTEL LOCK ALL CLEAR mode, then press the ENTER button.
The "OK" indicator appears for 4 seconds on the screen.

CONTENTS
SERVICING NOTICES ON CHECKING......................................................................................................
HOW TO ORDER PARTS ...........................................................................................................................
IMPORTANT................................................................................................................................................
TO CANCEL HOTEL LOCK........................................................................................................................
CONTENTS .................................................................................................................................................
GENERAL SPECIFICATIONS ....................................................................................................................
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF ANODE CAP ..............................................................................................................
2. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ................................................................
SERVICE MODE LIST.................................................................................................................................
CONFIRMATION OF USING HOURS.........................................................................................................
NOTE FOR THE REPLACING OF MEMORY IC ........................................................................................
ELECTRICAL ADJUSTMENTS ..................................................................................................................
MAJOR COMPONENTS LOCATION GUIDE .............................................................................................
BLOCK DIAGRAM ......................................................................................................................................
PRINTED CIRCUIT BOARDS
MAIN/CRT..........................................................................................................................................
T' TEXT/FRONT AV JACK ................................................................................................................
SCHEMATIC DIAGRAMS
MICON/TUNER..................................................................................................................................
IF/CHROMA/SOUND AMP ................................................................................................................
SOUND ..............................................................................................................................................
POWER .............................................................................................................................................
DEFLECTION/CRT............................................................................................................................
JACK..................................................................................................................................................
VIDEO/R.G.B SWITCH......................................................................................................................
FRONT AV JACK...............................................................................................................................
T' TEXT ..............................................................................................................................................
WAVEFORMS .............................................................................................................................................
MECHANICAL EXPLODED VIEW ..............................................................................................................
MECHANICAL REPLACEMENT PARTS LIST ..........................................................................................
ELECTRICAL REPLACEMENT PARTS LIST ............................................................................................
A2-1
A1-1
A1-1
A1-1
A1-1
A2-1
A3-1~A3-4
B-1
B-2, B-3
C-1
C-1
C-1
D1-1~D2-1
D3-1
E-1, E-2
F-1~F-4
F-5, F-6
G-1, G-2
G-3, G-4
G-5, G6
G-7, G-8
G-9, G-10
G-11, G-12
G-13, G-14
G-15, G-16
G-17, G-18
H-1, H-2
I-1
J1-1
J2-1, J2-2

GENERAL SPECIFICATIONS
A3-1
G-1.Outline of theProduct
21 inch(544.5
mmV):Measured diagonally
ColorCRT 90 degreedeflection
G-2.Broadcasting System
CCIR System B/G
G-3.Color System NTSC PAL SECAM or Monochrome signal
G-4.NTSC Playback(PAL 60Hz) Yes No
G-5.NTSC 3.58+4.43/PAL60Hz Yes No
G-6.Antenna Input Impedance
VHF/UHF 75 ohm unbalanced
G-7.Tuner and Receiving
Tuner : Contactless Electric Tuner
Oscar(W/O HYPER) Oscar(W/ HYPER) France CATV) Others
channel coverage
(PAL) AUS0 , E2~ E4
, X ~ Z+2 , S1 ~ S10 , E5 ~ E12 ,
S11 ~ S41 , E21 ~ E69
Tuning System
Frequency syn. Voltage syn. Others
G-8.Preset Channel
110 channels
G-9.Intermediate Frequency
Picture(fP) 38.90 MHz MHz MHz
Sound(fS) 34.47 MHz MHz MHz
fP-fS 33.40 MHz MHz MHz
G-10.Stereo/Dual TV Sound
Yes( NICAM GERMAN USA JAPAN) No
G-11.Tuner Sound Muting Yes No
G-12.PowerSource 240 V AC 50Hz AC 60Hz
G-13.PowerConsumption: 50 WatAC 240 V 50 Hz
-- WatDC --- V
Standby: 10 WatAC 240 V 50 Hz
Per Year: -- kWh / Year
G-14.Dimensions(Approx.)
600 mm(W) 480 mm(D) 446 mm(H)
G-15.Weight(Approx.) Net : 20.7 kg ( -- lbs)
Gross: 23.5 kg( -- lbs)
G-16.Cabinet Material
Cabinet Front: PS 94HB DECABROM
ABS 94V2 NON-DECA
94V0
Back Panel: PS 94HB DECABROM
ABS 94V2 NON-DECA
94V0

GENERAL SPECIFICATIONS
A3-2
G-17.Protector: Power Fuse
G-18.Regulation
Safety
UL CSA SAA SI CE SEV
BS NF NEMKO FEMKO DEMKO IEC65
SEMKO NZ HOMOLO SABS CNS SISIR
NOM AS3159 DENTORI UNE GOST NONE
Radiation
FCC DOC FTZ PTT CE SEV
SABA SI NF NZ HOMOLO UNE
CNS CISPR13 DENTORI AS/NZS NONE
X-Radiation
PTB DHHS HWC DENTORI NONE
G-19.Temperature
Operation 5 ºC~ 40
ºC
Storage -20 ºC~ 60 ºC
G-20.Operating Humidity Less than 80 %RH
G-21.Clock and Timer
Sleep Timer Yes Max 120 Min.( 10 Min. Step) No
On/Off Timer Yes 4 Programs No
Wake Up Timer Yes Programs No
G-22.Timer back up Time
More than -- Minutes (at Power Off Mode)
G-23.TerminalsVHF/UHF Antenna Input Din Type F-Type France Type
Front Video Input (RCA ø8.3)
Front Audio Input (RCA ø8.3)
Rear Video Input (RCA ø8.3)
Rear Audio Input (RCA ø8.3)
Rear Video Output (RCA ø8.3)
Rear Audio Output (RCA ø8.3)
21Pin (x ) DC Jack(Center +) Ear Phone Jack(ø3.5)
Head Phone(Stereo & Mono) AC Outlet Ext Speaker
Diversity S Input(Front) S Input(Rear)
G-24.Indicator Power Stand By On Timer NONE
( ) (Red) ( )
G-25.Display
On Screen Display
Menu Clock Set( 12H 24H) System Selec On/Off Timer
Hotel Lock Area Code CH Tuning
Sound 1/2 NICAM Auto Off Picture
Guide CH Set Audio Language
CATV Pin Code Registration
Control Level Sound Brightness Contrast
Color Tint(NTSC Only) Sharpness
Tuning Bass Treble
Balance Back Light
Stereo,Audio Output,Bilingual Picture Menu
Stereo,Audio Output,SAP Mid Night Theater
Stereo,Audio Output GAME
CH/AV Clock Pin Code Hotel Lock
Sleep Timer Sound Mute Channel Band
PAL/NTSC3.58/NTSC4.43 AFT Video

GENERAL SPECIFICATIONS
A3-3
G-26.OSD Language
Eng Ger Fre Spa Ita Por Jpn
OSD Language Setting
Eng Ger Fre Spa Ita Por Jpn
Not Applicable
G-27.SpeakerPosition Front Side Bottom
Size 6 1/4 x 2 1/4 inches
Imp. 4 ohm x 2 pcs
Power Max 1.25 + 1.25 W
10% 1.0+1.0 W(Typical)
G-28.EXT Speaker : Yes -- W Imp -- ohm
G-29.Carton
Master Carton: Need No Need
Content: ---- Set
Material: ---- / ---- Corrugated Carton
Dimensions: ---- mm(W) ---- mm(D) ---- mm(H)
Description of Origin Yes No
Gift Box
Material Double/Brown Corrugated Carton ( with Photo Label)
Double/White Corrugated Carton ( with Photo Label)
Double Full Color Carton W/Photo
Dimensions: 660 mm(W) 540 mm(D) 541 mm(H)
Design: As Per BUYER 's
Description of Origin: Yes No
Drop Test Natural Dropping At 1 Corner / 3 Edges / 6 Surfaces
Height 25cm 31cm 46cm 62cm 80cm
Container Stuffing: 304 Sets / 40' container
G-30.Accessories
Owner's Manual ( W/Guarantee Card) [English]
AC Plug Adapter Channel Film
Battery (UM- 4 x 2 ) Remote Control Unit
Safety Tip Toll Free Insert Sheet
Guarantee Card Audio-Video Cord (RCA)
Registration Card Warning Sheet
Quick Set-Up Sheet Schematic Diagram
Information Sheet U/V Mixer
75 ohm Coaxial Cable ( Single Shield Double Shield)
300 ohm to 75 ohm VHF Antenna Adaptor
21pin Cable Car Cord
Rod Antenna
One Pole Two Pole ( F-Type Din Type France Type)
Loop Antenna ( F-Type Din Type France Type)
G-31.Other Features
Auto Degauss Auto Search Full OSD
Auto Shut Off CH Allocation Premiere
Canal+ SAP Comb Filter
CATV Channel Lock Auto CH Memory
Anti-Theft Just Clock Function Hotel Lock
Rental GamePosition Fastext
Unitext TopText Closed Caption
Picture Menu Mid Night Theater
Memory( Last Ch Last Vol.)

GENERAL SPECIFICATIONS
A3-4
G-32.Switch
Front Power(Tact) Channel Up Volume Up
System Select Channel Down Volume Down
Main Power SW Sub Power
Rear AC/DC TV/CATV Selector
Degauss Main Power SW
G-33.Magnetic Field
BV : +0.45G BV : +0.35G BV : +0.25G
BH : 0.18G BH : 0.30G BH : 0.30G
BV : -0.15G BV : -0.25G BV : -0.50G
BH : 0.15G BH : 0.15G BH : 0.30G
G-34.Remote Control Unit: RC-BQ
Glow in Dark Remocon Yes No
PowerSource: D.C 3 V BatteryUM- 4x2
Total : 38 Key
Power Quick View TV/AV
Stand By Status Bar Select
0/AV Time Select PAL/SECAM
1 Time Set Volume Up
2 Mute Volume Down
3 CH Skip CH Call
4 CH1/CH2 CH Down
5 Channel CH Up
6 Text/Mix/TV CH Down/Page Down
7 Display Cancel CH Up/Page Up
8 Initial Page +/-
9 Store Program
10 Reveal F/T/B
11 Sleep Hold
12 Skip List
1 * Preset Rotate
2 * 5.5/6.5MHz Browse
0/10 Auto Memory Std/Auto
Tone 1/2 Auto Memory
Info Call Band Select
Mono/Auto Reset Search
TV/Caption/Text Menu Clock/Program
Expand Enter Clock/Set
Red Add Ch Set
Cyan Delete Set +
Normal Yellow Set -
Color System Random Green
Wide Selecy Tuning Up/Time Text Nicam/Mono
Auto Wide On/Off Tuning Down/Reset Tone A/B
Picture Position Navi FM Transmitter
Direct Change/Auto Search Back Light
Picture Menu Mid Night Theater ./..

1. REMOVAL OF ANODE CAP
Read the following NOTED items before starting work.
After turning the power off there might still be a potential
voltage that is very dangerous. When removing the
Anode Cap, make sure to discharge the Anode Cap's
potential voltage.
Do not use pliers to loosen or tighten the Anode Cap
terminal, this may cause the spring to be damaged.
*
*
REMOVAL
1. Follow the steps as follows to discharge the Anode Cap.
(Refer to Fig. 1-1.)
Connect one end of an Alligator Clip to the metal part of a
flat-blade screwdriver and the other end to ground.
While holding the plastic part of the insulated Screwdriver,
touch the support of the Anode with the tip of the
Screwdriver.
A cracking noise will be heard as the voltage is discharged.
Flip up the sides of the Rubber Cap in the direction of the
arrow and remove one side of the support.
(Refer to Fig. 1-2.)
2.
DISASSEMBLY INSTRUCTIONS
GND on the CRT
Screwdriver
Alligator Clip
Support CRT
GND on the CRT
Rubber Cap
CRT Support
Fig. 1-1
Fig. 1-2
3. After one side is removed, pull in the opposite direction to
remove the other.
NOTE
Take care not to damage the Rubber Cap.
INSTALLATION
1. Clean the spot where the cap was located with a small
amount of alcohol. (Refer to Fig. 1-3.)
B-1
Location of Anode Cap
Fig. 1-3
NOTE
Confirm that there is no dirt, dust, etc. at the spot where
the cap was located.
2.
3.
Arrange the wire of the Anode Cap and make sure the
wire is not twisted.
Turn over the Rubber Cap. (Refer to Fig. 1-4.)
Fig. 1-4
4. Insert one end of the Anode Support into the anode button,
then the other as shown in Fig. 1-5.
5.
6. Confirm that the Support is securely connected. Put on the Rubber Cap without moving any parts.
CRT Support Fig. 1-5

Masking Tape
(Cotton Tape)
DISASSEMBLY INSTRUCTIONS
2.
REMOVAL
IC
Put the Masking Tape (cotton tape) around the Flat
Package IC to protect other parts from any damage.
(Refer to Fig. 2-1.)
1.
Fig. 2-1
NOTE
REMOVAL AND INSTALLATION OF
FLAT PACKAGE IC
Some ICs on the PCB are affixed with glue, so be
careful not to break or damage the foil of each IC
leads or solder lands under the IC when removing it.
NOTE
Masking is carried out on all the parts located within
10 mm distance from IC leads.
Blower type IC
desoldering machine
IC
Heat the IC leads using a blower type IC desoldering
machine. (Refer to Fig. 2-2.)
2.
Fig. 2-2
NOTE
Do not add the rotating and the back and forth
directions force on the IC, until IC can move back and
forth easily after desoldering the IC leads completely.
When IC starts moving back and forth easily after
desoldering completely, pickup the corner of the IC using
a tweezers and remove the IC by moving with the IC
desoldering machine. (Refer to Fig. 2-3.)
3.
Blower type IC
desoldering
machine
IC Fig. 2-3
Tweezers
Peel off the Masking Tape.4.
Absorb the solder left on the pattern using the Braided
Shield Wire. (Refer to Fig. 2-4.)
5.
NOTE
Do not move the Braided Shield Wire in the vertical
direction towards the IC pattern.
Braided Shield Wire
Soldering Iron
Fig. 2-4
IC pattern
B-2

DISASSEMBLY INSTRUCTIONS
Supply soldering
from upper position
to lower position
IC
Supply the solder from the upper position of IC leads
sliding to the lower position of the IC leads.
(Refer to Fig. 2-6.)
2.
Fig. 2-6
Soldering IronSolder
IC
Absorb the solder left on the lead using the Braided
Shield Wire. (Refer to Fig. 2-7.)
3.
Fig. 2-7
Soldering Iron
Braided Shield Wire
NOTE
Do not absorb the solder to excess.
IC
When bridge-soldering between terminals and/or the
soldering amount are not enough, resolder using a Thin-
tip Soldering Iron. (Refer to Fig. 2-8.)
4.
Fig. 2-8
Thin-tip Soldering Iron
NOTE
When the IC leads are bent during soldering and/or
repairing, do not repair the bending of leads. If the
bending of leads are repaired, the pattern may be
damaged. So, be always sure to replace the IC in this
case.
Finally, confirm the soldering status on four sides of the
IC using a magnifying glass.
Confirm that no abnormality is found on the soldering
position and installation position of the parts around the
IC. If some abnormality is found, correct by resoldering.
5.
Solder temporarily
Soldering Iron
INSTALLATION
Take care of the polarity of new IC and then install the
new IC fitting on the printed circuit pattern. Then solder
each lead on the diagonal positions of IC temporarily.
(Refer to Fig. 2-5.)
1.
Fig. 2-5
Solder temporarily
B-3

SERVICE MODE LIST
This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily.
The SERVICE MODE dose not funtion if the clock has been set.
if so, unplug AC cord to set the clock to the nonclock setting mode.
To enter the Service Mode, press both set key and remote control key for more than 1 second.
VOL. (-) MIN 1 Initialization of the factory.
NOTE: Do not use this for the normal servicing.
Set Key Remocon Key Operations
VOL. (-) MIN Display of the Adjustment MENU on the screen.
Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment).
9
8Writing of EEPROM initial data.
NOTE: Do not use this for the normal servicing.
VOL. (-) MIN
VOL. (-) MIN 7Releasing of PROTECTION PASSWORD.
Can be checked of the INITIAL DATA of MEMORY IC.
Refer to the "NOTE FOR THE REPLACING OF MEMORY IC".
POWER ON total hours is displayed on the screen.
Refer to the "CONFIRMATION OF USING HOURS".
VOL. (-) MIN 6
CONFIRMATION OF USING HOURS
POWER ON total hours can be checked on the screen. Total hours are displayed in 16 system of notation.
1.
2.
3.
Set the VOLUME to minimum.
Press both VOL. DOWN button on the set and Channel
button (6) on the remote control for more than 1 second.
After the confirmation of using hours, turn off the power.
INIT 00 83
0010
CRT ON
ADDRESS DATA
FIG. 1
Initial setting content of MEMORY IC.
POWER ON total hours.
= (16 x 16 x 16 x thousands digit value)
+ (16 x 16 x hundreds digit value)
+ (16 x tens digit value)
+ (ones digit value)
NOTE FOR THE REPLACING OF MEMORY IC
If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to
ensure correct data settings while making reference to TABLE 1.
Table 1
1.
2.
3.
4.
5.
6.
7.
8.
The unit will now have the correct DATA for the new MEMORY IC.
Enter DATA SET mode by setting VOLUME to minimum.
Press both VOL. DOWN button on the set and Channel button (6) on the remote control for more than 2 seconds.
ADDRESS and DATA should appear as FIG 1.
ADDRESS is now selected and should "blink". Using the SET + or - keys on the remote, step through the ADDRESS until
required ADDRESS to be changed is reached.
Press ENTER to select DATA. When DATA is selected, it will "blink".
Again, step through the DATA using SET + or - until required DATA value has been selected.
Pressing ENTER will take you back to ADDRESS for further selection if necessary.
Repeat steps 3 to 6 until all data has been checked.
When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.
NOTE: The confirmation of USING HOURS does not function if the clock has been set.
If so, unplug AC cord to set the clock to the nonclock setting mode.
The confirmation of USING HOURS does not function if the clock has been set.
If so, unplug AC cord to set the clock to the nonclock setting mode.
No need the setting for after INI F3.
NOTE:
+9
+2
INI +0 +1 +3 +4 +5 +6 +7
E0
+8 +A
0A 00 00 00 F4 94 60----
+E+B +C +D +F
F0 00 00 00 00
D0 13 28 00 00
C-1
•
•

ELECTRICAL ADJUSTMENTS
1. Synchro Scope
2. Digital Voltmeter
3. Color Bar Generator
Fig. 2-2
1. AGC AUTO
2. RF AGC DELAY
3. VIDEO LEVEL
4. FM LEVEL
5. OSD H
6. CUT OFF
7.
8. 0. RETURN
2-2: VCO
1.
2.
3.
Receive the color bar pattern.
Connect the digital voltmeter to TP202.
Adjust the L204 until the digital voltmeter is 3.5 ±0.05V.
D1-1
2. BASIC ADJUSTMENTS
On-Screen Display Adjustment
Unplug AC cord to set the clock to the nonclock setting
mode. And then set the volume to minimum.
Press both VOL. DOWN button on the set and the
Channel button (9) on the remote control for more than
1 second to appear the adjustment mode on the screen
as shown in Fig. 2-1.
NOTE
Use the Channel buttons (1-8) on the remote control to
select the options shown in Fig. 2-1.
Press the Channel button (0) on the remote control to
end the adjustments.
1. H/V
2. AKB
3. COLOR TEMP
4. PICTURE
5. OTHERS
6. TEST PATTERN
7.
8. (VOL TEST) 0. END Fig. 2-1
2-1: RF AGC DELAY
1.
2.
3.
4.
5.
Receive monoscope pattern.
Connect the digital voltmeter to pin 5 of CP101.
Activate the adjustment mode display of Fig. 2-1 and
press the channel button (5) on the remote control to
select "OTHERS". The Fig. 2-2 appears on the display.
Press the channel button (2) on the remote control to
select "RF AGC RELAY".
Press the VOL. UP/DOWN button on the remote control
until the digital voltmeter is 1.4 ±0.05V.
2-3: CUT OFF
1.
2.
3.
4.
5.
6.
2-4: FOCUS
1.
2.
3.
4.
2-5: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustments.
1.
2.
3.
4.
5.
6
7.
8.
9.
Place the set wiht Aging Test for more than 10 minutes.
Receive the white 100% signal from the Pattern
Generator.
Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 2-1 and
press the channel button (2) on the remote control to
select "AKB". The Fig. 2-3 appears on the display.
Press the channel button (2) on the remote control to
select the "R.BIAS".
Using the VOL. UP/DOWN on the remote control, adjust
the R.BIAS.
Press the CH. UP/DOWN button on the remote control to
select the "G.BIAS", "B.BIAS", "R.DRIVE", or "B.DRIVE".
Using the VOL. UP/DOWN button on the remote control,
adjust the G.BIAS, B.BIAS, R.DRIVE or B.DRIVE.
Perform the above adjustments 7 and 8 until the white
color is looked like a white.
Place the set with Aging Test for more than 15 minutes.
Set condition is AV MODE without signal.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 2-1 and
press the channel button (5) on the remote control to
select "OTHERS". The Fig. 2-2 appears on the display.
Press the channel button (6) on the remote control to
select "CUT OFF".
Adjust the Screen Volume until a dim raster is obtained.
Using the remote control, set the brightness and
contrast to normal position.
Receive the monoscope pattern.
Turn the Focus Volume fully counterclockwise once.
Adjust the Focus Volume until picture is distinct.
1. BEFORE MAKING ELECTRICAL
ADJUSTMENTS
•
•
•
•
Use an isolation transformer when performing any
service on this chassis.
Before removing the anode cap, discharge electricity
because it contains high voltage.
When removing a PCB or related component, after
unfastening or changing a wire, be sure to put the wire
back in its original position.
Inferior silicon grease can damage IC's and transistors.
When replacing IC's and transistors, use only specified
silicon grease (YG6260M).
Remove all old silicon before applying new silicon.
Read and perform these adjustments when repairing the
circuits or replacing electrical parts or PCB assemblies.
CAUTION
Prepare the following measurement tools for electrical
adjustments.
1.
2.

Receive the monoscope pattern. (RF Input)
Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 2-1 and
press the channel button (4) on the remote control to
select "PICTURE". The Fig. 2-4 appears on the display.
Press the channel button (1) on the remote control to
select "BRIGHT".
Press the VOL. UP/DOWN button on the remote control
until the white 25% is starting to be visible.
Receive the monoscope pattern. (Audio Video Input)
Press the AV button on the remote control to set to the
AV mode. Then perform the above adjustments 2~5.
2-6: BRIGHTNESS
1. BRIGHT
2. CONTRAST
3. COLOR
4. TINT
5. SHARPNESS
6. OSD CONT
7.
8. 0. RETURN Fig. 2-4
2-7: COLOR
1.
2.
3.
4.
5.
6.
7.
8.
9.
Receive the color bar pattern. (RF Input)
Connect the oscilloscope to TP802.
Using the remote control, set the brightness, contrast,
color and tint to normal position.
Activate the adjustment mode display of Fig. 2-1 and
press the channel button (4) on the remote control to
select "PICTURE". The Fig. 2-4 appears on the display.
Press the channel button (3) on the remote control to
select "COLOR".
Adjust the VOLTS RANGE VARIABLE knob of the
oscilloscope until the range between white 100% and 0%
is set to 4 scales on the screen of the oscilloscope.
Press the VOL. UP/DOWN button on the remote control
until the red color level is adjusted to 3.2 scales (85%) ±5%
for the white level. (Refer to Fig. 2-5)
Receive the color bar pattern. (Audio Video Input)
Press the AV button on the remote control to set to the
AV mode. Then perform the above adjustment 2~7.
85%
0%
ELECTRICAL ADJUSTMENTS
2-8: CONTRAST
1.
2.
3.
4.
Receive the monoscope pattern.
Activate the adjustment mode display of Fig. 2-1 and
press the channel button (4) on the remote control to
select "PICTURE". The Fig. 2-4 appears on the display.
Press the channel button (2) on the remote control to
select "CONTRAST".
Press the VOL. UP/DOWN button on the remote control
until the bar step is set to the "24".
2-9: HORIZONTAL PHASE
1.
2.
3.
4.
5.
Receive the monoscope pattern.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 2-1 and
press the channel button (1) on the remote control to
select "H/V". The Fig. 2-6 appears on the display.
Press the channel button (1) on the remote control to
select "H. PHASE".
Press the VOL. UP/DOWN button on the remote control
until the SHIFT quantity of the OVER SCAN on right
and left screen edges are equal.
Fig. 2-6
1. H. PHASE
2. H. BLK
3. V. SIZE
4. V. POSI
5. V. LIN 50/60
6. V. SC 50/60
7. V. COMP
8. (H. FREQ) 0. RETURN
D1-2
1.
2.
3.
4.
5.
6.
7.
100%
Fig. 2-5
1. AKB AUTO
2. R. BIAS
3. G. BIAS
4. B. BIAS
5. R. DRIVE
6. G. DRIVE
7. B. DRIVE
8. 0. RETURN Fig. 2-3
2-10: VERTICAL POSITION
1.
2.
3.
4.
5.
Receive the monoscope pattern.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 2-1 and
press the channel button (1) on the remote control to
select "H/V". The Fig. 2-6 appears on the display.
Press the channel button (4) on the remote control to
select "V. POSI".
Press the VOL. UP/DOWN button on the remote control
until the horizontal line of the monoscope comes to
approximate center of the CRT.

ELECTRICAL ADJUSTMENTS
2-11: VERTICAL SIZE
1.
2.
3.
4.
5.
Receive the monoscope pattern.
Using the remote control, set the brightness and contrast
to normal position.
Activate the adjustment mode display of Fig. 2-1 and
press the channel button (1) on the remote control to
select "H/V". The Fig. 2-6 appears on the display.
Press the channel button (3) on the remote control to
select "V. SIZE".
Press the VOL. UP/DOWN button on the remote
control until the SHIFT quantity of the OVER SCAN on
upside and downside becomes 8 ±3%.
2-12: VERTICAL LINEALITY
1.
2.
3.
4.
5.
6.
7.
Receive the monoscope pattern.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 2-1 and
press the channel button (1) on the remote control to
select "H/V". The Fig. 2-6 appears on the display.
Press the channel button (5) on the remote control to
select "V. LIN 50/60".
Press the VOL. UP/DOWN button on the remote control
until the SHIFT quantity of the OVER SCAN on upside
and downside becomes minimum.
Receive the monoscope pattern. (Audio Video Input)
Press the AV button on the remote control to set to the
AV mode. Then perform the above adjustments 2~5.
D1-3
[ TV ]
OSD H
BFig. 2-7
A
2-13: OSD HORIZONTAL
1.
2.
3.
4.
Using the remote control, set the brightness and
contrast to normal position.
Activate the adjustment mode display of Fig. 2-1 and
press the channel button (5) on the remote control to
select "OTHERS". The Fig. 2-2 appears on the display.
Press the channel button (5) on the remote control to
select "OSD H".
Press the VOL. UP/DOWN button on the remote control
until the difference of A and B becomes minimum.
(Refer to Fig. 2-7)
2-14: TINT
1.
2.
3.
4.
5.
Receive the color bar pattern.(Audio Video lnput)
Connect the oscilloscope to TP801.
Activate the adjustment mode display of Fig. 2-1 and
press the channel button (4) on the remote control to
select "PICTURE". The Fig. 2-4 appears on the display.
Press the channel button (4) on the remote control to
select "TINT".
Press the VOL. UP/DOWN button on the remote control
until the waveform becomes as shown in Fig. 2-8.
Fig. 2-8
2-15: CONSTANT VOLTAGE
1.
2.
3.
4.
Using the remote control, set the brightness and
contrast to normal position.
Connect the digital voltmeter to TP501.
Set condition is AV MODE without signal.
Adjust the VR501 until the DC voltage is 135 ±1V.
"TINT"

ELECTRICAL ADJUSTMENTS
3.
1.
2.
3.
1.
2.
3.
4.
5.
6.
7.
8.
Adjust after performing adjustments in section 3-1.
DEFLECTION YOKE
DEFLECTION YOKE SCREW
MAGNET SCREW
PURITY MAGNETS
6 POLE MAGNETS
4 POLE MAGNETS
Fig. 3-1
PURITY AND CONVERGENCE
ADJUSTMENTS
NOTE
NOTE
3-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT)
Turn the unit on and let it warm up for at least 30
minutes before performing the following adjustments.
Place the CRT surface facing east or west to reduce the
terrestrial magnetism.
Turn ON the unit and demagnetize with a Degauss Coil.
Adjust after performing adjustments in section 3-2.
3-3: STATIC CONVERGENCE
1.
2.
3.
3-4: DYNAMIC CONVERGENCE
NOTE
Adjust after performing adjustments in section 3-3.
1.
2.
Adjust the differences around the screen by moving
the deflection yoke upward/downward and right/left.
(Refer to Fig. 3-2-a)
Insert three wedges between the deflection yoke and
CRT funnel to fix the deflection yoke.
(Refer to Fig. 3-2-b)
R G B
R
G
B
R G B
R
G
B
Receive the crosshatch pattern from the color bar
generator.
Combine red and blue of the 3 color crosshatch pattern
on the center of the screen by adjusting the pair of
4 pole magnets.
Combine red/blue (magenta) and green by adjusting the
pair of 6 pole magnets.
D2-1
Tighten the screw for the magnet. Refer to the adjusted
CRT for the position. (Refer to Fig. 3-1)
If the deflection yoke and magnet are in one body,
untighten the screw for the body.
Receive the green raster pattern from the color bar
generator.
Slide the deflection yoke until it touches the funnel
side of the CRT.
Adjust center of screen to green, with red and blue on the
sides, using the pair of purity magnets.
Switch the color bar generator from the green raster
pattern to the crosshatch pattern.
Combine red and blue of the 3 color crosshatch pattern
on the center of the screen by adjusting the pair of
4 pole magnets.
Combine red/blue (magenta) and green by adjusting the
pair of 6 pole magnets.
Adjust the crosshatch pattern to change to white
by repeating steps 6 and 7.
Receive the green raster pattern from the color bar
generator.
Adjust the pair of purity magnets to center the
color on the screen.
Adjust the pair of purity magnets so the color at the
ends are equally wide.
Move the deflection yoke backward (to neck side)
slowly, and stop it at the position when the whole
screen is green.
Confirm red and blue colors.
Adjust the slant of the deflection yoke while watching the
screen, then tighten the fixing screw.
1.
2.
3.
4.
5.
NOTE
3-2: PURITY
SLANT
UPWARD/DOWNWARD
RIGHT/LEFT
SLANT
Fig. 3-2-a
WEDGE
WEDGE
WEDGE
WEDGE POSITION
Fig. 3-2-b

D3-1
MAJOR COMPONENTS LOCATION GUIDE
TP501
TU001
CP101
IC201
CRT PCB
MAIN PCB
FOCUS VOLUME
SCREEN VOLUME
FB401
J753 J752
L204
TP202
VR501
TP801 TP802 J801

E-1 E-2
BLOCK DIAGRAM
CF201
SAW FILTER
IF/CHROMA IC
IC201 LA76812
5
41
48 49
Q611
TV POWER
Q502
BUFFER
Q503
+B DRIVE
Q504
SW
STAND BY
D106
9
18OSD R
19OSD G
20OSD B
35SCL
MICON IC
IC101 OEC6056A
XIN
XOUT
KEY
A_MUTE
36SDA
AV1
6
RESET
29
AV2
7
8
STAND BY LED
13
ATS
POWER
44
REMORT
31
2
22H-SYNC
23V-SYNC
Q201
27
28
X101
8MHz
BPLIF
TU001
11 7
21
20
19
A2C
PLL
PHASE
SHIFTER HDR
OUT
23
BUS
4
5
6
VIDEO
AMP
VIDEO
DET 46
IF/RF AGC
FM
DET
SW
54
FBP
18
38
X601
4.433619MHz
VIF
AMP
LIM
AMF
DC
VOL
28
11
12
52
2
17
51
48 49
IF
IDENT
DRIVE/
OUT-OFF
OSD
SW
AFC2 44
CLMP
VIDEO
SW
CONTRAST
BRIGHT
RGB
MATRIX VER
RAMP
SYNC
SEP
TRAP
VCO
TINT
DEMO
COLOR
CLAMP
Q402
Q401
H. OUTPUT
H. DRIVE
Q754
VIDEO
OUT
BUFFER
L204
64
31
MEMORY IC
IC102 S-24C08ADPA-01
SCL
SDA
6
5
Q807
G-DRIVE
PUMP UP
AMP
+
-
725
V-OUT IC
IC401 LA7840
VIDEO SW IC
IC701 NJM2245L
3
RESET IC
IC103 PST600C
5V REG. IC
IC502 KIA7805API
F502
T501
12 16
1
4
1Q101
V-BUFFER
10
HV
F
S
FB401
FBT
1
4
CRT
397
RGB
Heater F8
4
3
5
6
31
5V REG. IC
IC402
KIA7805API
4
D501~D504
RECTIFIER
L502
L501
13
2
TH501
AUTO DEGAUSS
SW501
L503
DEGAUSS COIL
24
13
1
2
34
IN AC
F501
POWER CONTROL IC
IC501 TDA16846
13
27
42
RELAY SW
Q505
SWITCHING
Q501
Q102
H-BUFFER
OSD Y 21
54
Q802
B-DRIVE
Q804
R-DRIVE
9V REG. IC
IC403 KIA7809API
SDA SCL
3
1
4
2
3
121
43
RY501
3
5
9
1
AGC
1
7
VR501
Q607
CLAMP SW.
Q301
BUFFER
Q103
BUFFER
9
3
21
J753
4
E
E
H
H
AV SIGNAL
SWITCHER IC
IC751 LA7151
5
310
1
3
2
1
J752
4
E
E
H
H
3
21
J702
4
E
E
H
H
Q701
BUFFER
IF AMP
Q302
A_MUTE SW
OS101
1
3
2AT + 5.6V
VOL DOWN
CH DOWN
VOL UP
CH UP/DOWN
SP351
SPEAKER
SP352
SPEAKER
IC352 AN7523
SOUND AMP
4
2
19
(MONO) IC DECORDER IC
IC850 ET106 DATA SLICER IC
IC851 ET317
19
17
13
1211
10
15
12
5
6
X850
13875KHz
23
22
19
20
2
Q851
BUFFER
14
16
15 CLAMP
Q852
SYNC BUFFER
+B ADJ

W001
CP852A
W004
R107
W006
W008
CP851A
W012
W013
W016
W017
W938
R772
L758
L760
C755
C766
R776
OS101
PH002
CF202
C301
R301
C302
C204
CF201
L202
C403
R212
R213
L301
L204
R630
X601
C308_1
IC201
C109
L101
IC103
W023
IC102
C110
R124
W024
W029
C616
W030
D103
W032
W033
CC002
IC751
D613
D615
D614
D612
X101_1
W034
C620
W818
W038
C628
R128
W039
C001
W047
R434
C503
R513
C507
VR501
R512
R529
F501
W053
W811
IC402
R432
C427
R420
R408
C430
IC403
CP401
C414 C415
C410
HS402
IC401
W057
C439
C446
C433
D405
CP803A
R405
R428
B401
C409
R422
C435
R421
C420
FB401
FH503
FH504 F502
B503
B504
ICP501
C529
D515
C527
TH501
RY501
C506
D502
D501
R503 R501
C510
W059
C502
C501
FH501
FH502
Q501
B502
B501
C515
T501
L502
PH001
HS501
SW501
HEATERAFC
GND
ABL
180V
NC
13V
25V B+ COL
C429
Q505
D506
R505
D514
R521
Q504
R523
L501_1
C526
CP502
D503
D504
R532
R533
Q502
Q503
R520
IC701
D106
C440
R411
W061
C608
R612_1
C607
D621 CP802A
D401
W073
D702
C708
C213
W080
CP701
D616
W085
W087
C712
W090
W091
W092
W096
C425
C111
SW102
SW104
SW106
SW107
W839
TP001
TP202
W099
C417
C518
C521
W105
R404
R522
W106
C212
R306
R517
C101
W108
TU001
R105
W111
IC501
R406
Q402
R519
D505
R448
D509 D507
D508
R756
C513
R514
C505
C519
D510
R516
W115
W116
W117
CP501
W119
21T21T
21T 21T
21T
W145
C517
R504
C641
C103
R126
W088
R446
C707
C632
D619
C610_2
W134
C606
W137
W022
W010
W068
W149
C208
W159 W161
W873
D601
C774
C751
W018
C701
T401
C317
C520
C313_1
W166
C423
W132
W851
W036
W122
W871 D609
C203_1
C416
W051
C532
Q754
W089
W110
R206 R145
S803Y
S803X
HS401
Q401
B301
HS403
W186
S801Y
IC502_1
C531
CP101_1
R511
L605
C656
S801X
CC001
W094
W058
W188
W189 R427
W045
R524
R002
R001
W163
W055
W859
R417
W185
W113
W020
W007
C648_1
TP501
W048
W075
L001
L753
C002
C767
R419
D610
C614
R629
W135
C303
C609 W928
C618
C647
W031
C626
W009
W154
W027
W041
W042
W044
W043
W046
W025
W011
R435
W081
W060
W162
W005 W003
R402
W802
C508
W050
C504
C511
R525
R530
R526
C512
R527
C514_1
W052
W054
W084
L701
R431
C622_1
C525
D404
R429
D410
C443
C444_1
D407
D513
R423
L410
C413 C401_1
R401
L401
C448
C405_1
C418_1
R425
D403
C320
D511 D516
C426_1
D104
D001
C516_1
W056
IF
NC
BTL
NC
BPL
V.S
SDA
SCL
ADR
NC
AGC
L406
R412
R410
C644
W174
R775
W191
W095
W157
W194
R336
R430
W074
C617_1
C437
W923
R754
W028
R713
D512
C718
C125
W101
C533
C760
W177
W109
R416
C534
R414
C412
C524
C408
C350
CP351_1
HS352
IC352
W849
W167
J753 J752
J801
C802_1
CP801
TP803
TP801
TP802
C807
CP802B
R804
Q802
R811
R813
R822
Q807
Q804
C820
R815
R816
C810
C804
CP803B
CP804
R808
R806
R823
CD804
D608
C003
D109
D110
D622
D623
C806_1
CH UP
20 CH DOWN
14 CH UP/
CH DOWN
VOL UP VOL DOWN
C535
S807Y
S807X
W926
W893
W896
W902
S902X S903X
S902Y
W858
W810
W880
W922
W920
W863
W856
W917
W862
W903
W807
W879
S903Y
R817
R819
R821
W936
R407_2
C319
W935
D701
D767
W932
W838
S810Y
S810X
D105
R418
R656
C703
R657
S811X
S811Y
W019
S808Y
S808X
C775_1
D754_1
W201
W198
PRINTED CIRCUIT BOARDS
MAIN/CRT (INSERTED PARTS)
SOLDER SIDE
F-1 F-2

R778
C765
R003R004
R759
R202
R205
R201
Q301
R307
R308
C206
C215
R409
C407
R312 C304
R218
C307
R617
R615
C205 R207
C207
R210
R211 C209
R624 C615
C306
C305 R302
R622
C621
C624 R634
R123 Q102
R130
R129R127
Q101
R120
C119
C104
C108
R112 R137
IC101
C120
R114
R111
R101
R110
R108 R109
C112
C107
C105
R102
R142
C121
C114
C214
Q611
R643
C404
R649
R122
R103
R138
R139
R623
R653
C702
C704
C706
Q701
R711
C710
W124
R710
W819
R758
W129
W130
C522
C627
R709
C201
R209
R208
Q201
R216
W850
R636
R134
C645
R143
R616
R638
W156
R651 R652
R708
R601
Q302
R327
R133
R650
R637
Q607
Q103
R613
R204
C202
R654
R136
C124
C123
B101
C008
C007
R641 C655
R330
R331
R403
W808
C642
R131
R627
R305
W809
R631
C652
R132
W128
W120
W190
R225
C758
C719
R704
R350
W121
W900
W877
W197
C220
C762
W199
C639_1
W200
R226
R113
R121
W894
W868
W869
W870
W813
W812
W865
W803
W927
W855
W918W921
W098
C113
C116
C118
R215
W933
W885
R703
PRINTED CIRCUIT BOARDS
MAIN (CHIP MOUNTED PARTS)
SOLDER SIDE
F-3 F-4
12
23
34
1

IC850
IC851
L852
L851
C865
W853
C868
Q851
B850
W002
C852
C877
C869
W003
R869
CP851B
CP852B
W005
W860
W858
W854
X850
W007
W004
W863
C870
W865
W851
C855
R885
TE9A15A
C876
R879
C881 C884 C880
C883
C879
C887
C864
C861
R851
R854
R853
R855
R857
R864 R865
W867
C886
W857
R867
W861
W859
W001
R871
C867
R881
R852
R880
Q852
R875
W868
W864
R870
C860 C858
W008
W870
TE9A15A
PRINTED CIRCUIT BOARDS
T' TEXT (INSERTED PARTS)
SOLDER SIDE
T' TEXT (CHIP MOUNTED PARTS)
SOLDER SIDE
F-5 F-6
J702
CD701
FRONT AV JACK
SOLDER SIDE