Orion 21MT9 Schematic
21MT9A
SERVICE MANUAL
COLOR TELEVISION RECEIVER
ORIGINAL
MFR’S VERSION B
Design and specifications are subject to change without notice.
SERVICING NOTICES ON CHECKING
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
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.
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.
6. AVOID AN X-RAY1. KEEP THE NOTICES
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.
Unplug the plug from the AC outlet.
2.
Remove the antenna terminal on TV and turn
on the TV.
3.
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].
4.
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
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.
TO CANCEL HOTEL LOCK
• Hotel lock can be cancelled by following steps 1-2.
1.
Press and hold the CHANNEL UP button on the TV, and press the POWER button on the remote
control simultaneously.
2.
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.
A1-1
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 ............................................................................................
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
A2-1
GENERAL SPECIFICATIONS
G-1.Ou tline of the P roduct
21 inch(544.5
Color CRT 90 degree deflection
G-2.Broadcasting System
CCIR System B/G
G-3.Color System NTSC PAL SECAM or Monochrome signal
mmV):Measured diagonally
G-4.NTS C Playb ack(PAL 60Hz)
G-5.NTSC 3.58+4 .43/PAL60Hz
G-6.An tenna Input Impedance
VHF/UHF 75 ohm unbalanced
G-7.Tuner 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
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
Sound (fS) 34.47 MHz MHz MHz
fP-fS 33.40 MHz MHz MHz
G-10.Stereo/D ual TV Sound
Yes( NICAM GERMAN USA JAPAN) No
G-11.Tuner Sound Muting
G-12.Power Source 240 V
Yes No
Yes No
Yes No
, X ~ Z+2 , S1 ~ S10 , E5 ~ E12 ,
MHz MHz
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
G-15.Weight(Approx.) Net : 20.7 kg ( -- lbs)
Gross: 23.5 kg ( -- lbs)
G-16.Cabinet Material
Cabinet Front:
Back Panel:
mm(D) 446 mm(H)
PS 94HB DECABROM
ABS 94V2 NON-DECA
94V0
PS 94HB DECABROM
ABS 94V2 NON-DECA
94V0
A3-1
GENERAL SPECIFICATIONS
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
Storage -20 ºC~ 60 ºC
G-20.Operating Humidity Less than 80 %RH
G-21.Clock an d Timer
Sleep Timer
On/Of f Ti mer Yes 4 Programs No
Wake Up T imer Yes Programs No
G-22.Timer back up Time
More than -- Minutes (at Power Off Mode)
G-23.Terminals
VHF/UHF Ante n na Inpu t Din Type F-Type France Type
Front Video Input (RCA ø8.3)
Front Audi o Input (RCA ø8 .3)
Rear Video Input (R CA ø8 .3)
Rear Audio Input (RCA ø8.3)
Rear Video 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 Cod e CH Tuning
Sound 1/2 NICAM Au to 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,Aud io Out pu t,SAP Mid Night Theater
Stereo,Aud io Out pu t GAME
CH/AV Clock Pin Code Ho tel L ock
Sleep Timer Sound Mute Channel Band
PAL/NTSC3.58/NTSC4.43 AFT Video
ºC
Yes Max 120 Min.( 10 Min. Step) No
A3-2
GENERAL SPECIFICATIONS
G-26.OSD Language
Eng Ger Fre Spa Ita Por Jpn
OSD Language Setting
Eng Ger Fre Spa Ita Por Jpn
Not Appl icable
G-27.Speaker
Pos ition
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.EX T Speaker : Yes -- W Imp -- ohm
G-29.Carton
Master Carton:
Gift Box
Drop Test Natural Dropping At 1 Corner / 3 Edges / 6 Surfaces
Container Stuffing: 304 Sets / 40' container
G-30.Accessories
Content: ---- Set
Material: ---- / ---- Corrugated Carton
Dimensions: ---- mm(W) ---- mm(D) ---- mm(H)
Description of Origin Yes No
Material
Dimensions: 660 mm(W) 540
Design: As Per BUYER 's
Description of Origin: Yes No
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)
Regist ra tio n Card Warning Sheet
Quick Se t-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 Ant enn a
One Pole Two Pole ( F-Type Din Type France Type)
Loop Antenna ( F-Type Din Type France Type)
Need No Need
Double/Brown Corrugated Carton ( with Ph oto Label )
Double/White Corrugated Carton ( with Photo Label)
Double Full Color Carton W/Photo
Height
Front Side Bottom
mm(D) 541 mm(H)
25cm 31cm 46cm 62cm 80cm
G-31.Other Features
Auto Degauss Auto Search Full OS D
Auto Shut Off CH Allocation Premiere
Canal+ SAP Comb Filter
CATV Channel Lock Auto CH Memory
Anti-Theft Just Clock Function Hote l Lock
Rental Game Position Fastext
Unitext TopText Closed Caption
Picture Menu Mid Night Theater
Memory( Last Ch Last Vol.)
A3-3
GENERAL SPECIFICATIONS
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 : +0.35G 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
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 C H 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 Memo ry 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 Syst em Ra nd om Green
Wide Selecy Tuning Up/Time Text Nicam/Mono
Auto Wi de On/Off Tuning Down/Reset Tone A/B
Picture Position Navi FM Transm i tter
Direct Change/Auto Search Ba ck L ig ht
Picture Menu Mid Night Theate r ./ ..
A3-4
DISASSEMBLY INSTRUCTIONS
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.
GND on the CRT
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.)
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.)
Screwdriver
Alligator Clip
GND on the CRT
Flip up the sides of the Rubber Cap in the direction of the
2.
arrow and remove one side of the support.
(Refer to Fig. 1-2.)
Rubber Cap
CRT
Support
Support
CRT
Fig. 1-1
Fig. 1-2
Fig. 1-4
4. Insert one end of the Anode Support into the anode button,
then the other as shown in Fig. 1-5.
Support
CRT
5.6.Confirm that the Support is securely connected.
Put on the Rubber Cap without moving any parts.
Fig. 1-5
B-1
DISASSEMBLY INSTRUCTIONS
2.
REMOVAL AND INSTALLATION OF
FLAT PACKAGE IC
REMOVAL
Put the Masking Tape (cotton tape) around the Flat
1.
Package IC to protect other parts from any damage.
(Refer to Fig. 2-1.)
NOTE
Masking is carried out on all the parts located within
10 mm distance from IC leads.
When IC starts moving back and forth easily after
3.
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.)
NOTE
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.
Blower type IC
desoldering
machine
Masking Tape
(Cotton Tape)
Heat the IC leads using a blower type IC desoldering
2.
IC
machine. (Refer to 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.
Blower type IC
desoldering machine
Fig. 2-1
Tweezers
IC
Fig. 2-3
Peel off the Masking Tape.4.
Absorb the solder left on the pattern using the Braided
5.
Shield Wire. (Refer to Fig. 2-4.)
NOTE
Do not move the Braided Shield Wire in the vertical
direction towards the IC pattern.
Braided Shield Wire
Soldering Iron
IC
Fig. 2-2
IC pattern
Fig. 2-4
B-2
DISASSEMBLY INSTRUCTIONS
INSTALLATION
Take care of the polarity of new IC and then install the
1.
new IC fitting on the printed circuit pattern. Then solder
each lead on the diagonal positions of IC temporarily.
(Refer to Fig. 2-5.)
Soldering Iron
Solder temporarily
Solder temporarily
Fig. 2-5
Supply the solder from the upper position of IC leads
2.
sliding to the lower position of the IC leads.
(Refer to Fig. 2-6.)
When bridge-soldering between terminals and/or the
4.
soldering amount are not enough, resolder using a Thintip Soldering Iron. (Refer to Fig. 2-8.)
Thin-tip Soldering Iron
IC
Fig. 2-8
Finally, confirm the soldering status on four sides of the
5.
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.
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.
Soldering IronSolder
IC
Absorb the solder left on the lead using the Braided
3.
Supply soldering
from upper position
to lower position
Shield Wire. (Refer to Fig. 2-7.)
NOTE
Do not absorb the solder to excess.
Soldering Iron
IC
Braided Shield Wire
Fig. 2-6
Fig. 2-7
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.
Set Key
Remocon Key
VOL. (-) MIN 1
Initialization of the factory.
NOTE: Do not use this for the normal servicing.
Operations
POWER ON total hours is displayed on the screen.
Refer to the "CONFIRMATION OF USING HOURS".
VOL. (-) MIN 6
Can be checked of the INITIAL DATA of MEMORY IC.
Refer to the "NOTE FOR THE REPLACING OF MEMORY IC".
VOL. (-) MIN
VOL. (-) MIN
VOL. (-) MIN
7
8
9
Releasing of PROTECTION PASSWORD.
Writing of EEPROM initial data.
NOTE: Do not use this for the normal servicing.
Display of the Adjustment MENU on the screen.
Refer to the "ELECTRICAL ADJUSTMENT" (On-Screen Display Adjustment).
CONFIRMATION OF USING HOURS
POWER ON total hours can be checked on the screen. Total hours are displayed in 16 system of notation.
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.
1.
Set the VOLUME to minimum.
2.
Press both VOL. DOWN button on the set and Channel
button (6) on the remote control for more than 1 second.
3.
After the confirmation of using hours, turn off the power.
ADDRESS DATA
INIT 00 83
CRT ON
0010
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.
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.
•
No need the setting for after INI F3.
INI +0
E0
F0
00
+1
00 00
+3 +4 +5
0A
-
00
+6 +7
00 00
+8 +A
00
F4 94 60---
+9
D0 13 28 00
+2
Table 1
1.
Enter DATA SET mode by setting VOLUME to minimum.
2.
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.
3.
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.
4.
Press ENTER to select DATA. When DATA is selected, it will "blink".
5.
Again, step through the DATA using SET + or - until required DATA value has been selected.
6.
Pressing ENTER will take you back to ADDRESS for further selection if necessary.
7.
Repeat steps 3 to 6 until all data has been checked.
8.
When satisfied correct DATA has been entered, turn POWER off (return to STANDBY MODE) to finish DATA input.
The unit will now have the correct DATA for the new MEMORY IC.
+D +F
+E+B +C
00
C-1
Loading...