Orion 21MT9A Service Manual
SERVICE MANUAL
Design and specifications are subject to change without notice.
21MT9A
COLOR TELEVISION 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 cathoderay 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 considering about the cathode-ray tube and the high
voltage peripheral circuit, etc.
Therefore, when repairing the high voltage peripheral 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 cathoderay 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 the Product
21 inch(544.5
mmV):Measured diagonally
Color CRT 90 degree deflection
G-2.Broadcasting System
CCIR System B/G
G-3.Color System NTSC PAL SECAM or Monochrome signal
G-4.NTS C Playbac k(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.Tune r and Receiving
Tuner : Contactless Electric Tuner
Oscar(W/ O HYPER) Oscar(W/ HYPER) Fr an c e CATV) Others
channel coverag e
(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.S tereo/Dua l TV Sound
Yes( NICAM GERMAN USA JAPAN) No
G-1 1.Tuner Sound Muting
Yes No
G-12.Power Source 240 V
AC 50Hz AC 60Hz
G-13.Power Consumption: 50 W at AC 240 V 50 Hz
-- W at DC --- V
Stand by: 10 W at AC 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 an d Timer
Sleep Timer
Yes Max 120 Min.( 10 Min. Step) No
On/Of f Ti mer 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.Terminals
VHF/UHF Ante nna Inpu t Din Type F-Type France Type
Front Video Input (RCA ø8 .3)
Front Audio Input (RCA ø8.3)
Rear Vi deo Input (RCA ø8.3)
Rear Audio Input (RCA ø8.3)
Rear Vi deo Output (RCA ø8.3)
Rear Audio Output (RCA ø8.3)
21 Pin (x ) DC Jack(Center +) E ar Phon e Jack(ø3.5)
Head Phone(Stereo & Mono) AC Outle t 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 T im er
Hotel L ock Area Code CH Tuning
Sound 1/ 2 NICAM Auto Off Picture
Guide C H Set Audio Language
CATV Pin Code Registration
Control Level Sound Brightness Contrast
Color Ti nt(NTSC Only) Sharpness
Tuning Bass Treble
Balance Back Light
Stereo,Audio Output,Bilingual Picture Menu
Stereo,Audio O ut pu t,SAP Mid Night Theater
Stereo,Audio O ut pu t GAME
CH/AV Clock Pin Code Hote l Loc k
Sleep Timer Sound Mut e 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 Lang uage Se tting
Eng Ger Fre Spa Ita Por Jpn
Not Applicable
G-27.Speaker
Positio n
Front Side Bottom
Size 6 1/4 x 2 1/4 inches
Imp. 4 ohm x 2 pcs
Powe r Max 1.25 + 1.25 W
10% 1.0 + 1.0 W (Typical)
G-28.EXT Speake r : 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 Or igin 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 Or igin: 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 Ad apter Chann el 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
Informat ion Sheet U/V Mixer
75 ohm Coaxial C able ( Single Shield Double Shield)
300 ohm to 75 ohm VHF Antenna Adaptor
21pin Cable Car Cord
Rod Ante nn a
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 Game Position 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 Fiel d
BV : +0.45G BV : +0.35 G 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
Power Source: D.C 3 V Battery UM - 4 x 2
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/Au to
Tone 1/2 Auto Memor y
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 Syst em Ra nd om Green
Wide Selecy Tuning Up/Time Text Nicam/Mono
Auto Wide On/Of f Tuning Down/Reset Tone A/B
Picture Position Navi FM Transmi tter
Direct Change/Auto Search Ba ck Lig ht
Picture Menu Mid Night Theate r ./..
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 Thintip 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
8
Writing of EEPROM initial data.
NOTE: Do not use this for the normal servicing.
VOL. (-) MIN
VOL. (-) MIN
7
Releasing 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
•
•
Loading...