Matsui 28wn04 Schematic
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SERVICE MANUAL
Manual Number: 668504
MATSUI 28WN04
Widescreen TV
Version 1.0
This Manual is available in Electronic format.
Mastercare, Maylands Avenue, Hemel Hempstead, Hertfordshire, HP2 7TG, Telephone 01442 888104
MATSUI 28WN04
Widescreen TV
SERVICE MANUAL
Specifications are subject to change without notice.
COPYRIGHT © 2000 MASTERCARE LIMITED
PRODUCED BY
MASTERCARE TECHNICAL CENTRE
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.
PUT PARTS AND WIRES IN THE
4.
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.
A-1
CONTENTS
SERVICING NOTICES ON CHECKING......................................................................................................
HOW TO ORDER PARTS ...........................................................................................................................
IMPORTANT................................................................................................................................................
CONTENTS .................................................................................................................................................
GENERAL SPECIFICATIONS ....................................................................................................................
DISASSEMBLY INSTRUCTIONS ...............................................................................................................
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/21PIN/WIDE SELECT/STEREO/POWER......................................................................................
SCHEMATIC DIAGRAMS
MICON/TUNER.......................................................................................................................................
VIF/SIF/CHROMA...................................................................................................................................
POWER ..................................................................................................................................................
DEFLECTION/CRT.................................................................................................................................
MICAM/TONE CONT..............................................................................................................................
21PIN/VIDEO SW ...................................................................................................................................
T'TEXT ....................................................................................................................................................
WIDE SERECT .......................................................................................................................................
CRT.........................................................................................................................................................
CHOKE COIL..........................................................................................................................................
WAVEFORMS .............................................................................................................................................
MECHANICAL EXPLODED VIEW ..............................................................................................................
PARTS LIST ...............................................................................................................................................
A1-1
A1-1
A1-1
A2-1
A3-1~A3-4
B-1
C-1
C-1
C-1
D1-1~D2-1
D3-1
E-1, E-2
F-1~F-4
F-5~F-8
G-1, G-2
G-3, G-4
G-5, G-6
G-7, G-8
G-9, G-10
G-11, G-12
G-13, G-14
G-15, G-16
G-17, G-18
G-19, G-20
H-1, H-4
I-1, I-2
J-1, J-6
A2-1
GENERAL SPECIFICATIONS
G-1.Ou tline of the Prod uct
28 inch( 660
Color CRT 106 degree deflection
G-2.Broadcasting System
U.K. System I
G-3.Color System NTSC PAL SECAM or Monochrome signal
mmV):Measured diagonally
G-4.PAL 60Hz
G-5.NTSC 3.58+4.43/PAL6 0Hz
G-6.An tenna Input Impedance
VHF/UHF 75 ohm unbalanced
G-7.Tuner and Receiving Contactless Electric tuner
channel Tuner
cannel coverage
Tuning System
Frequency syn. Voltage syn. Others
G-8.Preset Channel
80 channels
G-9.Intermediate Frequency
Picture(fP) 39.5 MHz
Sound (fS) 33.5 MHz MHz MHz
fP-fS 6.0 MHz MHz MHz
G-10.Stereo/Dual TV Sound
Yes( NICAM GERMAN USA JAPAN) No
G-11..Power Source 230 ~ 240 V
EXT DC Jack ---- V
Oscar(W/O HYPER) Oscar(W/ HYPER)
France CATV) Others
21~ 69
Yes No
Yes No
AC 50Hz AC 60Hz
MHz MHz
G-12.Power Consumption: 115 W at AC 230 V 50 Hz
W at DC V
Stand by: 8.5 W at AC 230 V 50 Hz
Per Year: kWh / Year
G-13.Dimensions(Approx.)
749 mm(W) 495
G-14.Weight(Approx.) Net : 31.0 kg ( 68.3 lbs)
Gross: 34.0 kg ( 74.9 lbs)
G-15.Cabinet Material
Cabinet Front:
Cabinet Rear:
mm(D) 483 mm(H)
PS 94HB DECABROM
ABS 94V2 NON-DECA
94V0
PS 94HB DECABROM
ABS 94V2 NON-DECA
94V0
A3-1
GENERAL SPECIFICATIONS
G-16.Protector: Power Fuse
G-17.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-18.Temperature
Operation 5 ºC~ 40
Storage -20 ºC~ 60 ºC
G-19.Operating Humidity Less than 80 %RH
G-20.Clock and Timer
Sleep Timer
On/Off Timer Yes Programs No
Wake Up Timer Yes Programs No
G-21.Terminals
VHF/UHF Antenna Din Type F-Type France Type
Video Input(Front) (RCA ø8.3)
Video Input(Rear)(x ) (RCA ø8.3)
Video Output(Rear) (RCA ø8.3)
Audio In put(Front) (RCA ø8.3)
Audio Input(Rear)(x ) (RCA ø8.3)
Audio Ou tput(Rear) (RC A ø8.3)
21 Pin (x 2 ) DC Jack(Center +) Ear Phone Jack(ø3. 5)
Head Phone Jack(ø3.5) AC Outlet Ext Speaker
Diversity S Input(Front) S Input(Rear)
ºC
Yes Max 120 Min.( 10 Min. Step) No
G-22.Indicator
G-23.Display
On Screen Display
Power Stand By On Timer
( ) ( Red
Menu
Clock Set( 12H 24H) System Select
On/Off Timer Hotel Lock Area Cod e
CH Tuning Sound 1/2 NIC AM Auto Off
Picture Guide CH Set Audio
Language CATV
Pin Code Registration AV2 OUTPUT SOURCE
Contro l Level
Sound Brightness Contrast
Color Tint(NTSC Only) Sharpness
Tuning Bass Treble
Balance Back Light
Stereo,Audio Output,Bilingual Picture Menu AFT
Stereo,Audio Output,SAP Mid Night Theate r Sound Mute
Stereo,Audio Output GAME Sleep Time
CH Clock Pin Code Hotel Lock Skip
NICAM ST
) ( )
A3-2
G-24.O S D Language
Eng Ger Fre Spa Ita Por Jpn
OSD Language Setting
Eng Ger Fre Spa Ita Por Jpn
Not Appl icable
GENERAL SPECIFICATIONS
G-25.Speaker
Size 1.8 x 3.9 inches
Imp 4 ohm x 2 pcs
Power Max 5.0+5.0 W
10% 4.0+4.0 W (Typical)
G-26.EX T Speake r
Yes ---- W Imp ---- ohm
G-27.Carton
Master Carton:
Content: ---- Set
Material: ---- / ---- Corrugated Carton
Dimensions: ---- mm(W) ---- mm(D) ---- mm(H)
Description of Origin Yes No
Gift Box
Material
Dimensions: 845 mm(W) 575
Design: As Per BUYER 's
Description of Origin: Yes No
Drop Test Natural Dropping At 1 Corner / 3 Edges / 6 Surfaces
Container Stuffing: 220 Sets / 40' container
Front Side Bottom
Need No Need
Double/Brown Corrugated Carton ( with Photo La bel)
Double/White Corrugated Carton ( with Photo Label)
Double Full Color Carton W/Photo
Height
25cm 31cm 46cm 62cm 80cm
mm(D) 587 mm(H)
G-28.Accessories
Owner's Manual ( W/Grarantee Card) [English]
AC Plug Adapter Channel Film
Battery (UM- 4 x 2 ) Remote Control Unit
DC Car Cord (Center+ ) AC Code
Guarantee Ca rd Warning Sheet
Regist ra tion Card Schematic Diagram
Quick Se t-Up Sheet U/ V Mixer
300 ohm to 75 ohm VHF Antenna Adaptor TV Stand K,+
Rod Ant enn a
One Pole Two Pole ( F-Type Din Type France Type)
Loop Antenna ( F-Type Din Type France Type)
G-29.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 Hote l Lock
Rental Game Position Fastext
Unitext TopText Closed Caption
Picture Menu Mid Night Theater Memory(Last CH,Last Volume)
Auto Set Up
A3-3
GENERAL SPECIFICATIONS
G-30.Switch
Power(Tact) Channel Up Volume Up
System Select Channel Down Volume Down
Main Power SW
G-31.Magnetic Fiel d
BV : +0.45G BV : +0.35G BV : +0.25G
BH : 0.18G BH : 0.30G BH : 0.3 0G
BV : -0.15G BV : -0.25G BV : -0.50G
BH : 0.15G BH : 0.15G BH : 0.30G
G-34.Remote Control Unit: RC-DN
Glow in Dark Remcon Yes No
Power Source: D.C 3 V Battery UM - 4 x 2
Total 34 Key
Power Quick View/Sub Page TV/AV
Stand By Status/Hold Bar Select
0/AV Quick View PAL/SECAM
1 Time Set Vo lume Up
2 Mute Volume Down
3 CH Skip CH Call
4 CH1/CH2 CH Down
5 Display Cancel CH Up
6 Text/Mix/TV CH Down/Page Down
7 Display Cancel CH Up/Page Up
8 Cancel Page +/ 9 Store Program
10 Skip/Reveal F/T/B
11 Sleep Hold
12 Skip List
Volume Up/ + Preset Rotate
Volume Down/ - Normal / F/T/B Browse
0/10 Auto Memory Std/Auto
Reset Memory Back Lig ht
Info Call Band Select
Fine Tuning + Reset Search
TV/Caption/Text Menu Clock/Program
Normal/Expand Enter Clock/Set
Red Add Ch Set
Cyan/Fine Tuning + Delete Set +
Normal Yellow/Fine Tuning - Set Color Syst em Fine Tuning - Green
Size Su b Pa ge Nicam/Mono
Auto Reset Tone A/B
Position Navi FM Transmi tter
Direct Change/Auto Search
Picture Menu Mid Night Theater
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
SERVICE MODE LIST
This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily.
SERVICE MODE will operate by the procedures below.
1. Set to the STANDBY at the minimum of volume.
2. Press the "Entry key" on the remote control for SERVICE MODE for more than 3 seconds.
3. Press POWER button on the remote control to turn the POWER ON within 2 seconds.
Entry Key Operations
1
6
7
9
Initialization of the factory.
NOTE: Do not use this for the normal servicing.
POWER ON total hours is displayed on the screen.
Refer to the "CONFIRMATION OF USING HOURS".
Can be checked of the INITIAL DATA of MEMORY IC.
Refer to the "NOTE FOR THE REPLACING OF MEMORY IC".
Releasing of PROTECTION PASSWORD.
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.
1.
Set to the STANDBY at the minimum of volume.
2.
Press the channel button (6) on the remote control for
more than 3 seconds.
3.
Press POWER button on the remote control to turn the
POWER ON within 2 seconds.
4.
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: No need the setting for after INI 16.
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9
01 00 00 00 D1 3F F8 3C 98
---
00 11 04 88 0A FF
10
1.
Set to the STANDBY at the minimum of volume.
2.
Press the channel button (6) on the remote control for more than 3 seconds.
3.
Press POWER button on the remote control to turn the POWER ON within 2 seconds.
ADDRESS and DATA should appear as Fig. 1.
4.
ADDRESS is now selected and should "blink". Using the VOL. UP/DOWN button on the remote, step through the
ADDRESS until required ADDRESS to be changed is reached.
5.
Press ENTER to select DATA. When DATA is selected, it will "blink".
6.
Again, step through the DATA using VOL. UP/DOWN button until required DATA value has been selected.
7.
Pressing ENTER will take you back to ADDRESS for further selection if necessary.
8.
Repeat steps 4 to 7 until all data has been checked.
9.
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.
00
--- --- ---
Table 1
+A
+B +C +D +E +FINI
3C 1D 88 00 00 0000
--- --- --- --- --- ---
C-1
ELECTRICAL ADJUSTMENTS
1. BEFORE MAKING ELECTRICAL
ADJUSTMENTS
Read and perform these adjustments when repairing the
circuits or replacing electrical parts or PCB assemblies.
CAUTION
•
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.
Prepare the following measurement tools for electrical
adjustments.
1. Digital Voltmeter
On-Screen Display Adjustment
Set to the STANDBY at the minimum of volume.
1.
Press the channel button (9) on the remote control for
2.
more than 3 seconds.
Press POWER button on the remote control to turn the
3.
POWER ON within 2 seconds. The Fig. 1-1 screen will
appear.
TV
2. BASIC ADJUSTMENTS
2-1: CONSTANT VOLTAGE
1.
Place the set with Aging Test for more than 15 minutes.
2.
Using the remote control, set the brightness and contrast
to normal position.
3.
Connect the digital voltmeter to TP501.
4.
Set condition is AV MODE without signal.
5.
Adjust the VR501 until the digital voltmeter is 135 ± 0.5V.
2-2: VCO CENT
Activate the adjustment mode display of Fig. 1-1 and
1.
press the channel button (03) on the remote control to
select "VCO CENT".
Adjust the L201 until the "OK" appears on the screen.
2.
2-3: AGC VOLTAGE
1.
Place the set with Aging Test for more than 15 minutes.
2.
Receive an 80dB monoscope pattern.
3.
Connect the digital voltmeter to pin 5 of CP101.
4.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (02) on the remote control to
select "RF.AGC".
5.
Press the VOL. UP/DOWN button on the remote
control until the digital voltmeter is 1.95 ± 0.05V.
2-4: CUT OFF
1.
Place the set with Aging Test for more than 15 minutes.
2.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (01) on the remote control to
select "CUT OFF".
3.
Adjust the Screen Volume until a dim raster is obtained.
00 OSD 13
Use the PROG/PAGE UP/DOWN button or Channel
4.
button (0-9) on the remote control to select the options
shown in Fig. 1-2.
Press the MENU button on the remote control to end
5.
the adjustments.
FUNCTION
NO.
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
OSD H
CUT OFF
RF.AGC
VCO CENT
H.POSI(50)
V.POSI(50)
V.SIZE(50)
V.LINEAR(50)
V.S CORR(50)
G.DRV
B.DRV
R.BIAS
G.BIAS
B.BIAS
BRI
CONT
UNI COL
TINT
SHARP
RGB CONT
SUB COL
B.B TINT
R-Y B
FUNCTION
NO.
B-Y B
23
LEVEL
24
STEREO
25
T.MONO
26
T.STE
27
V.LIN
28
H.SIZE(FULL)
29
PARABOLA CORR(FULL)
30
V SIZE(FULL)
31
H SIZE(EXPAND)
32
PARABOLA CORR(EXPAND)
33
V SIZE(EXPAND)
34
H SIZE(NORMAL)
35
PARABOLA CORR(NORMAL)
36
V SIZE(NORMAL)
37
PARABOLA CORR(CINEMA2)
38
V SIZE(CINEMA2)
39
H CORR
40
V CORR
41
CORNER CORR
42
TRAPEZOID DIS
43
V.POSI
44
NOR. BLK
45
Fig. 1-1
Fig. 1-2
2-5: WHITE BALANCE
NOTE: Adjust after performing CUT OFF adjustments.
1.
Place the set with Aging Test for more than 10 minutes.
2.
Receive the color bar pattern.
3.
Activate the adjustment mode display of Fig. 1-1 and
press the channel button (11) on the remote control to
select "R.BIAS".
4.
Using the VOL. UP/DOWN button on the remote
control, adjust "R.BIAS".
5.
Press the PROG/PAGE UP/DOWN button on the
remote control to select the "G.DRV", "B.DRV",
"G.BIAS", or "B.BIAS".
6.
Using the VOL. UP/DOWN button on the remote
control, adjust the G.DRV, B.DRV, G.BIAS or B.BIAS.
7.
Perform the above adjustments 5 and 6 until the white
color is looked like a white.
2-6: FOCUS
1.
Receive the monoscope pattern.
2.
Turn the Focus Volume fully counterclockwise once.
3.
Adjust the Focus Volume until picture is distinct.
D1-1
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