Memorex MT2206 Schematic

MT2206 Series A
SERVICE MANUAL
COLOR TELEVISION RECEIVER
ORIGINAL
MFR'S VERSION A
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.
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.
A1-1
CONTENTS
SERVICING NOTICES ON CHECKING..........................................................................................................
HOW TO ORDER PARTS...............................................................................................................................
IMPORTANT....................................................................................................................................................
CONTENTS.....................................................................................................................................................
GENERAL SPECIFICATIONS........................................................................................................................
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF ANODE CAP.................................................................................................................
2. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC...................................................................
SERVICE MODE LIST.....................................................................................................................................
CONFIRMATION OF HOURS USED..............................................................................................................
WHEN REPLACING EEPROM (MEMORY) IC...............................................................................................
ELECTRICAL ADJUSTMENTS.......................................................................................................................
BLOCK DIAGRAM...........................................................................................................................................
PRINTED CIRCUIT BOARDS
MAIN/CRT....................................................................................................................................................
SCHEMATIC DIAGRAMS
MICON/CHROMA/TUNER...........................................................................................................................
DEFLECTION/CRT......................................................................................................................................
TV POWER..................................................................................................................................................
SOUND.......................................................................................................................................................
AV................................................................................................................................................................
WAVEFORMS..................................................................................................................................................
MECHANICAL EXPLODED VIEW...................................................................................................................
MECHANICAL REPLACEMENT PARTS LIST...............................................................................................
ELECTRICAL REPLACEMENT PARTS LIST.................................................................................................
A1-1 A1-1 A1-1 A2-1 A3-1~A3-4
B1-1 B2-1, B2-2 C-1 C-1 C-1 D-1~D-5 E-1, E-2
F-1~F-4
G-1, G-2 G-3, G-4 G-5, G-6 G-7, G-8 G-9, G-10 H-1, H-2 I-1 J1-1 J2-1, J2-2
A2-1
GENERAL SPECIFICATIONS
5oC
0oC
0oC
60oC
G-1 TV CRT CRT Size / Visual Size 20 inch / 480.0mmV
G-2 Tuning Broadcasting System US System M
G-3 Power Power Source AC 120V AC 60Hz
G-4 Regulation Safety UL
G-5 Temperature Operation
G-6 Operating Humidity Less than 80% RH G-7 On Screen Menu Yes
System CRT Type Normal
Color System NTSC Speaker 2Speaker
Sound Output MAX 2.5+2.5 W
NTSC3.58+4.43 /PAL60Hz No
System Tuner and System 1Tuner
Receive CH Destination USA(W/ CATV)
Intermediate Picture(FP) 45.75MHz Frequency Sound(FS) 41.25MHz
Preset CH Stereo/Dual TV Sound Yes Tuner Sound Muting Yes
Power Consumption at AC
Protector Power Fuse Yes
Display Menu Type Character
Picture Yes
Audio No
CH Set Up Yes
Language Yes V-chip Yes
Control Level Yes
Stereo,Audio Output,SAP Yes Video Yes Color Stream No
Deflection 90 degree Magnetic Field BV/BH +0.45G/0.18G
Position Front Size 2 x 4.7 Inch Impedance 8 ohm
10%(Typical) 2.0+2.0 W
Tuning System F-Synth Input Impedance VHF/UHF 75 ohm
CH Coverage A - I, J - W, W+1 - W+84
FP-FS 4.50MHz
DC
Stand by (at AC) 5 W at AC 120 V 60 Hz Per Year -- kWh/Year
Radiation FCC X-Radiation DHHS
Storage
Contrast Yes Brightness Yes Color Yes Tint Yes Sharpness Yes
Bass No Treble No Balance No BBE On/Off No Stable Sound On/Off Yes Surround On/Off No
TV/CATV Yes Auto CH Memory Yes Add/ Delete Yes
CH Label No Favorite CH No Color Stream DVD/DTV No
Volume Yes Brightness Yes Contrast Yes Color Yes Tint Yes Sharpness Yes Tuning No Bass No Treble No Balance No Back Light No
90 W at AC 120 V 60 Hz
+
~ +4
-2
~ +
2 - 69, 4A, A-5 - A-1,
No
A3-1
GENERAL SPECIFICATIONS
Channel(TV/Cable) Yes CH Label No Sleep Timer Yes Sound Mute Yes
G-8 OSD Language English French Spanish
V-chip Rating Yes
G-9 Clock and Sleep Timer Max Time 120 Min
G-10 Remote Unit RC-DW
G-11 Features Auto Degauss Yes
Timer Step 10 Min
On/Off Timer Program(On Timer / Off Timer) No Wake Up Timer No Timer Back-up (at Power Off Mode) more than -- Min Sec
Control Glow in Dark Remocon No
Format NEC Custom Code 86-05 h Power Source Voltage(D.C) 3V
UM size x pcs UM-4 x 2 pcs Total Keys 28 Keys Keys Power Yes
1 Yes
2 Yes
3 Yes
4 Yes
5 Yes
6 Yes
7 Yes
8 Yes
9 Yes
0 Yes
100 No
CH Up Yes
CH Down Yes
Volume Up Yes
Volume Down Yes
TV/Caption/Text Yes
CH1/CH2 Yes
TV/Video(TV/AV) Yes
CH RTN/CH ENT(Quick View) Yes
Sleep Yes
RE Call(Call) Yes
Reset Yes
Menu Yes
Enter Yes
Mute Yes
Exit No
MTS(Audio Select) Yes
Set + Yes
Set - Yes Multi Brand Keys CH Up(VCR) No
CH Down(VCR) No
Pause/Still No
TV/VCR(VCR) No
Code No
FF No
Rew No
Rec No
Play No
Stop No
TV No
VCR No
Cable No
Auto Shut Off Yes Canal+ No CATV Yes Anti-theft No Rental No Memory(Last CH) Yes Memory(Last Volume) Yes V-Chip Yes
Type USA,ORION Type BBE No Auto Search No CH Allocation No SAP Yes Tone Control No
A3-2
GENERAL SPECIFICATIONS
Channel Lock No Just Clock Function No Game Position No CH Label No VM Circuit No Full OSD No Premiere No Comb Filter No
Auto CH Memory Yes Hotel Lock No Closed Caption Yes Stable Sound Yes Surround No Energy Star No Power On Memory No Favorite CH No
G-12 Accessories Owner's Manual Language English / Spanish
w/Guarantee Card Buyer Model No. MT2206 SeriesA Remote Control Unit Yes Rod Antenna No
Poles
Terminal Loop Antenna
Terminal U/V Mixer DC Car Cord (Center+) Guarantee Card Yes Warning Sheet Circuit Diagram Antenna Change Plug Service Facility List Important Safeguard Dew/AHC Caution Sheet AC Plug Adapter Quick Set-up Sheet Battery
UM size x pcs
OEM Brand AC Cord AV Cord (2Pin-1Pin) Registration Card PTB Sheet 300 ohm to 75 ohm Antenna Adapter
G-13 Interface Switch Front Power Yes
System Select No
Main Power SW No
Sub Power No
Channel Up/Reset Yes
Channel Down/Enter Yes
Volume Up/Set Up Yes
Volume Down/Set Down Yes
MENU=Volume Up+Volume Down Yes
Rear AC/DC No
TV/CATV Selector No
Degauss No
Main Power SW No Indicator Power No
Stand-by No
On Timer No Terminals Front Video Input
Audio Input
Other Terminal No
Rear Video Input(Rear1) No
Video Input(Rear2) No
Audio Input(Rear1) No
Audio Input(Rear2) No
Video Output No
Audio Output No
Euro Scart No
Color Stream No
Diversity No
Ext Speaker No
DC Jack 12V(Center +) No
VHF/UHF Antenna Input
AC Outlet No
Lines
No
No
No No
No No No No No No No No No
No No No No No No
RCA RCA x 2
F Type
A3-3
GENERAL SPECIFICATIONS
G-14 Set Size Approx. W x D x H (mm) 590 x 492 x 447 G-15 Weight Net (Approx.) 21.0kg
G-16 Carton Master Carton
Gift Box Yes
Drop Test
Container Stuffing
G-17 Material Cabinet Cabinet Front PS 94V0 DECABROM
PCB Non-Halogen Demand
Gross (Approx.) 23.8kg
Content ----
Material --
Dimensions W x D x H(mm) -- x -- x --
Description of Origin
Material Double / Brown
Dimensions W x D x H(mm) 658 x 575 x 529
Design As per Buyer's
Description of Origin Yes
Natural Dropping At 1 Corner / 3 Edges / 6
Height (cm) 46
288
Cabinet Rear PS 94V0 DECABROM
Eyelet Demand
( 46.3 lbs) ( 52.5lbs) No Sets /--
No
Surfaces
Sets/40' container
No No
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
B1-1
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
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.
Fig. 2-3
Braided Shield Wire
Soldering Iron
IC
Fig. 2-2
IC pattern
Fig. 2-4
B2-1
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
Supply the solder from the upper position of IC leads
2.
Solder temporarily
sliding to the lower position of the IC leads. (Refer to Fig. 2-6.)
Fig. 2-5
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
B2-2
SERVICE MODE LIST
This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter the Service Mode, press both set key and remote control key for more than 1 second.
Set Key
VOL. (-) MIN VOL. (-) MIN 1
VOL. (-) MIN
VOL. (-) MIN 8
VOL. (-) MIN
Remocon Key Operations
0
6
9
Releasing of V-CHIP PASSWORD and LOCK PASSWORD.
Initialization of the factory. NOTE: Do not use this for the normal servicing.
If you set a factory initialization, the memories are reset such as the clock
setting, the channel setting, the POWER ON total hours, and PLAY/REC
total hours.
POWER ON total hours is displayed on the screen. Refer to the "CONFIRMATION OF HOURS USED".
Can be checked of the INITIAL DATA of MEMORY IC. Refer to the "WHEN REPLACING EEPROM (MEMORY) IC".
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 HOURS USED
POWER ON total hours can be checked on the screen. Total hours are displayed in 16 system of notation.
NOTE: If you set a factory initialization, the total hours is reset to "0".
Set the VOLUME to minimum.
1. Press both VOL. DOWN button on the set and Channel
2. button (6) on the remote control for more than 1 second. After the confirmation of using hours, turn off the power.
3.
ADDRESS DATA
INIT 00 50 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)
WHEN REPLACING EEPROM (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.
INI
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
00 AA 20 14 4F 00 03
50 04 4F 4C 17 B3 24 39 33 00
Table 1
1.
Enter DATA SET mode by setting VOLUME to minimum.
2.
While holding down VOLUME button on front cabinet, press key 6 on remote control for more than 1 second. ADDRESS and DATA should appear as FIG 1.
3.
ADDRESS is now selected and should "blink". Using the VOL. +/- button 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 VOL. +/- button 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.
After the data input, set to the initializing of shipping.
9.
Turn POWER on.
10.
While holding down VOLUME button on front cabinet, press key 1 on remote control for more than 1 second.
11.
After the finishing of the initializing of shipping, the unit will turn off automatically.
C-1
ELECTRICAL ADJUSTMENTS
1.
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.
When you exchange IC and Transistor for a heat sink, apply the silicon grease (YG6260M) on the contract section of the heat sink, Before applying new silicon grease, remove all the old silicon grease. (Old grease may cause damages to the IC and Transistor.)
Prepare the following measurement tools for electrical adjustments.
1. Oscilloscope
2. Digital Voltmeter
3. Multi-sound Generator
4. Pattern Generator
On-Screen Display Adjustment
In the condition of NO indication on the screen.
1.
Press the 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. 1-1.
TV
2. BASIC ADJUSTMENTSBEFORE MAKING ELECTRICAL
2-1: CUT OFF
1.
Adjust the unit to the following settings. R.DRIVE=64, B.DRIVE=64, R.BIAS=64, G.BIAS=64, B.BIAS=64, BRI CENT=110, CONT MAX=90.
2.
Place the set with Aging Test for more than 15 minutes.
3.
Activate the adjustment mode display of Fig. 1-1 and press the channel button (01) on the remote control to select "CUT OFF".
4.
Adjust the Screen Volume until a dim raster is obtained.
2-2: FOCUS
1.
Receive the monoscope pattern.
2.
Turn the Focus Volume fully counterclockwise once.
3.
Adjust the Focus Volume until picture is distinct.
2-3: WHITE BALANCE NOTE: Adjust after performing CUT OFF adjustment.
Place the set with Aging Test for more than 10 minutes.
1. Receive the white 100% signal from the Pattern
2. Generator. Using the adjustment control, set the brightness and
3. contrast to normal position. Activate the adjustment mode display of Fig. 1-1 and
4. press the channel button (10) on the remote control to select "R. BIAS". Press the CH. UP/DOWN button on the remote control to
5. select the "R. BIAS", "G. BIAS", "B. BIAS", R. DRIVE or "B. DRIVE". Adjust the VOL. UP/DOWN button on the remote control
6. to whiten the R. BIAS, G. BIAS, B. BIAS, R. DRIVE, and B. DRIVE at each step tone sections equally. Perform the above adjustments 6 and 7 until the white
7. color is looked like a white.
00 OSD 16
Use the Channel UP/DOWN button or Channel button
2. (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
3. the adjustments.
FUNCTION
NO.
OSD H
00
CUT OFF
01
H.VCO
04
H.PHAS
05
V.SIZE
06
V.SHIFT
07
R.DRIVE
08
B.DRIVE
09
R.BIAS
10
G.BIAS
11
B.BIAS
12
BRIGHT CENT
13
BRIGHT MAX
14
BRIGHT MIN
15
CONTRAST CENT
16
FUNCTION
NO.
CONTRAST MAX
17
CONTRAST MIN
18
COLOR CENT
19
COLOR MAX
20
COLOR MIN
21
TINT
22
SHARPNESS
23
FM LEVEL
24
LEVEL
25
SEPARATION 1
26
SEPARATION 2
27
TEST MONO
28
TEST STEREO
29
X-RAY TEST
30
Fig. 1-2
Fig. 1-1
2-4: SUB TINT/SUB COLOR
1.
Receive the color bar pattern. (RF Input)
2.
Connect the oscilloscope to TP024.
3.
Activate the adjustment mode display of Fig. 1-1 and press the channel button (22) on the remote control to select "TINT".
4.
Press the VOL. UP/DOWN button on the remote control until the section "A" becomes as straight line.
(Refer to Fig. 2-1)
5.
Connect the oscilloscope to TP022.
6.
Activate the adjustment mode display of Fig. 1-1 and press the channel button (19) on the remote control to select "COL.CENT".
7.
Adjust the VOLTS RANGE VARIABLE knob of the oscilloscope until the range between white 100% and 0% is set to 4 scales
8.
Press the VOL. UP/DOWN button on the remote control until the red color level is adjusted to 110% of the white level. (Refer to Fig. 2-2)
9.
Receive the color bar pattern. (Audio Video Input)
10.
Press the TV/AV button on the remote control to set to the AV mode. Then perform the above adjustments 2~8.
D-1
"A"
ELECTRICAL ADJUSTMENTS
2-8: VERTICAL LINEARITY NOTE: Adjust after performing adjustments in section 2-7.
1.
Receive the monoscope pattern.
2.
Using the remote control, set the brightness and contrast to normal position.
3.
Adjust the VR402 until the SHIFT quantity of the OVER
"A"
SCAN on upside and downside becomes minimum.
After the adjustment of Vertical Linearity, reconfirm the Vertical Position and Vertical Size adjustments.
Fig. 2-1
White 100%
2-5: HORIZONTAL PHASE
1.
Receive the monoscope pattern.
2.
Using the adjustment control, set the brightness and contrast to normal position.
3.
Activate the adjustment mode display of Fig. 1-1 and press the channel button (05) on the remote control to select "H.PHAS".
4.
Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on right and left becomes minimum.
2-6: VERTICAL SHIFT
1.
Receive the monoscope pattern.
2.
Using the remote control, set the brightness and contrast to normal position.
3.
Check if the step No. V. SHIFT is "3".
4.
Adjust the VR401 until the horizontal line becomes fit to the notch of the shadow mask.
2-7: VERTICAL SIZE
1.
Receive the monoscope pattern.
2.
Using the adjustment control, set the brightness and contrast to normal position.
3.
Activate the adjustment mode display of Fig. 1-1 and press the channel button (06) on the remote control to select "V.SIZE".
4.
Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on upside and downside becomes 10 ± 2%.
5.
Receive a broadcast and check if the picture is normal.
Red 110%
Fig. 2-2
2-9: OSD HORIZONTAL
1.2.Activate the adjustment mode display of Fig. 1-1. Press the VOL. UP/DOWN button on the remote control until the difference of A and B becomes minimum and up 2 steps. (Refer to Fig. 2-3)
TV
00 OSD 16
BA
2-10: SUB BRIGHTNESS
1.
Activate the adjustment mode display of Fig. 1-1 and press the channel button (13) on the remote control to select "BRI.CENT".
2.
Press the VOL. UP/DOWN button on the remote control until the screen begin to shine.
3.
Receive a broadcast and check if the picture is normal.
4.
Press the TV/AV button on the remote to set to the AV mode. Then perform the above adjustment 1~3.
2-11: CONSTANT VOLTAGE
1.
Set condition is AV MODE without signal.
2.
Connec the digital voltmeter to the TP402.
3.
Adjust the VR502 until the digital voltmeter is 117 ± 1V.
2-12: SEPARATION 1, 2 Please do the method (1) or method (2) adjustment. Method (1)
1.
Set the multi-sound signal generator for each different L-ch and R-ch frequency (Ex. L-ch=2KHz, R-ch=400Hz) and receive the RF.
2.
Connect the oscilloscope to the pin 6 of CP601 and pin 7 of CP601.
3.
Activate the adjustment mode display of Fig. 1-1 and press the channel button (26) on the remote control to select "SEP 1".
4.
Press the VOL. UP/DOWN button on the remote control to adjust it until the audio output wave becomes a fine sine wave.
5.
Press the CH UP button once the set to "SEP 2" mode. Then perform the above adjustment 4.
Fig. 2-3
D-2
ELECTRICAL ADJUSTMENTS
Method (2)
1.
Set the multi-sound signal generator L-ch=1KHz, R-ch =Non input and receive the RF.
2.
Connect the oscilloscope to the pin 7 of CP601.
3.
Activate the adjustment mode display of Fig. 1-1 and press the channel button (26) on the remote control to select "SEP 1".
4.
Press the VOL. UP/DOWN button on the remote control to adjust it until the R-ch output becomes minimum.
5.
Set the multi-sound signal generator L-ch=Non input, R-ch=1KHz and receive the RF.
6.
Connect the oscilloscope to the pin 6 of CP601.
7.
Activate the adjustment mode display of Fig. 1-1 and press the channel button (27) on the remote control to select "SEP 2".
8.
Press the VOL. UP/DOWN button on the remote control to adjust it until the L-ch output becomes minimum.
2-13: LEVEL
1.
Receive a 70~80dB monoscope pattern.
2.
Connect the AC voltmeter to the pin 6 of CP601.
3.
Activate the adjustment mode display of Fig. 1-1 and press the channel button (25) on the remote control to select "LEVEL".
4.
Press the VOL. UP/DOWN button on the remote control until the AC voltmeter is 75 ± 1mV.
2-14: SUB CONTRAST
1.
Activate the adjustment mode display of Fig. 1-1 and press the channel button (17) on the remote control to select "CONT MAX".
2.
Press the VOL. UP/DOWN button on the remote control until the contrast step No. becomes "90".
3.
Receive a broadcast and check if the picture is normal.
4.
Press the TV/VIDEO button on the remote control to set to the AV mode. Then perform the above adjustments 1~3.
2-15: Confirmation of Fixed Value (step No.)
Please check if the fixed values of the each adjustment items are set correctly referring below.
RF
03 155 50 40 12 86 00 43 01 00 00
AV
03 181 50 40 12 86 00 43 01 00 00
NO.
FUNCTION
04
H VCO
14
BRIGHT MAX
15
BRIGHT MIN
16
CONT CENT
18
CONT MIN
20
COLOR MAX
21
COLOR MIN
23
SHARPNESS
24
FM LEVEL
28
TEST MONO
29
TEST STEREO
D-3
ELECTRICAL ADJUSTMENTS
3.
PURITY AND CONVERGENCE ADJUSTMENTS
NOTE
Turn the unit on and let it warm up for at least 30
1. minutes before performing the following adjustments. Place the CRT surface facing east or west to reduce the
2. terrestrial magnetism. Turn ON the unit and demagnetize with a Degauss Coil.
3.
3-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT)
Tighten the screw for the magnet. Refer to the adjusted
1. 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
2. generator. Slide the deflection yoke until it touches the funnel
3. side of the CRT. Adjust center of screen to green, with red and blue on the
4. sides, using the pair of purity magnets. Switch the color bar generator from the green raster
5. pattern to the crosshatch pattern. Combine red and blue of the 3 color crosshatch pattern
6. on the center of the screen by adjusting the pair of 4 pole magnets. Combine red/blue (magenta) and green by adjusting the
7. pair of 6 pole magnets. Adjust the crosshatch pattern to change to white
8. by repeating steps 6 and 7.
3-2: PURITY NOTE
Adjust after performing adjustments in section 3-1.
1.
Receive the green raster pattern from color bar generator.
2.
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.
3.
Move the deflection yoke backward (to neck side) slowly, and stop it at the position when the whole screen is green.
4.
Confirm red and blue colors.
5.
Adjust the slant of the deflection yoke while watching the screen, then tighten the fixing screw.
DEFLECTION YOKE DEFLECTION YOKE SCREW MAGNET SCREW
3-3: STATIC CONVERGENCE NOTE
Adjust after performing adjustments in section 3-2.
1.
Receive the crosshatch pattern from the color bar generator.
2.
Combine red and blue of the 3 color crosshatch pattern on the center of the screen by adjusting the pair of 4 pole magnets.
3.
Combine red/blue (magenta) and green by adjusting the pair of 6 pole magnets.
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
UPWARD/DOWNWARD SLANT RIGHT/LEFT SLANT
WEDGE
WEDGE POSITION
R G B
Fig. 3-2-a
WEDGE
WEDGE
Fig. 3-2-b
R G B
Fig. 3-1
PURITY MAGNETS 6 POLE MAGNETS
4 POLE MAGNETS
D-4
ELECTRICAL ADJUSTMENTS
4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION)
CRT PCB
FB401
VR502
CRT
CP803A
TP402
CD801
J801
CP801
VR401
CP806
CP802B
CP401
W876
W874
TP022
CP803B
TP024
CP601
VR402
CRT DY
TU001
CP1001
DEGAUSS COIL
AC IN
L503
S501A
CP502
S501B
MAIN PCB
CP802A
J710
SPEAKER
J711
J712
D-5
CH. DOWN
BLOCK DIAGRAM
Q504
RELAY DRIVE
RY501
RELAY
L503 DEGAUSS COIL
TH501
D501~D504
RECTIFIER
F501
AC IN
VOL. DOWN
CH. UP
VOL. UP
POWER
OS101
1
T501
11
7
5
TU001
12
11
10
13
17
IC501 LTV-817M-VB
3
FEED BACK
Q502
13
BUFFER
Q501
SWITCHING
AUDIO_R IN (FRONT) J712
2
2
AUDIO_L IN (FRONT) J711
MICON/CHROM IC IC101 OEC7091A
67 68
69 70
78
66
Q507
FEED BACK
I/O
IIC TIM INT
PWM
AD
SW
SOUND DECORDER IC IC901 AN5829S
14
23
24
RGB Proc.2 OSD SW CONTRAST BRIGHTNESS
RGB Proc.1 RGB MATRIX COLOR CONT
OSD
ROM RAM
62
SDA
21
22
56
20
26
Q804
DY
9 F S
HV
RED AMP
Q805
GREEN AMP
Q806
BLUE AMP
6
11
Heater
10
F
8
RGB
CRT
7
SPEAKER SP1001
SPEAKER SP1002
RGB OUTPUT Stage DRIVE CUT OFF HV BLK
Hor.Proc. SYNC SEPA/Hor. VCO Hor.COUNT DOWN
MCU CLK
Chroma Proc. ACC/C-BPF APC/KILLER TINT/DEMO
Ver.Proc. Ver SYNC SEP Ver.COUNT DOWN V RAMP
AFC-1/H COINCIDENT AFC-2 H PHASE
VCXO
58
6
5
MEMORY IC
SCL
IC199 S-24C04BDP-LA
57
38
37
V-OUT IC IC401 AN5522
PUMP UP
­AMP
+
VCC
75
1
26
16
X601
3.579545MHz
2
VIDEO IN (FRONT) J710
SOUND AMP IC IC1001 AN7522N
6 8
4
10
2
12
50 51 52
Q607
H.CTL
46 45
Q402
H. DRIVE
Q401
H. OUTPUT
FB401
1 2
10
3
E-1
E-2
PRINTED CIRCUIT BOARDS
MAIN/CRT (INSERTED PARTS)
SOLDER SIDE
CD501
RISK OFFIRE
W889
R123
R115
W083
W028
R101
R620
W029
W051
W050
R629_1
Q606
R611
W086
R127
W089
J710
W049
C630
CP1001
R005
W013
R125
HS1001
W816
W830
SW104 SW103
R804_1
CP801
W812
C520_1
W106
D505
D514
C531
D510
C517
D419
D418
V.POSI
R411
Q504
C516
W104
R553
R515
R401
W836
R528
R516
CP401
D527 D520
W827
R432
W114
W111
W817
W848
W842
D515
R410
R406
W115
W900
C501
R529
C403_1
W113
R002
R001
HS403
C417
R436
R413
C427
W062
W141
W107
D402
T401_1
R434
R424
Q402_1
C446
R417
R420
VR402
R408
R418
W860
R446
C414
W849
D404
C440
C418
R403
IC401
C439
W064
W074
W850
W091
C633
W071
R450
D406
D412
R143
W076
W070
W090
C118
W078
W101
R618
W058
W079
IC199
D001
Q609
R107
CP802A
R615
W080
W093
D606
W096
S806X
W087
C002
R613
R108
W057 W056 W055
W100
R614
R130
W054
R1004
W853
C004
W048
R608
W065
W061
W059
R131_1
W077
TU001
W135
W052
W045
Q607
W075
CP806_1
D805
C437_1
TP402
D407
W117
W118
CP802B
W120
C420_1
C802
W892
SW101
R819
C521
B503
B504
R427
R445
HS401
R409
J801
W119
D517
W843
R412
VR401
D504
C518_1
FH501
D516
C533_1
Q502
D508
D526
SW105
F501 FH502
R500
RY501
C502
D509
W893
S501A
W123
W124
IC501
C530_1
C503
HS501
D528
Q507
S501B
D503
D521
C507_1
D502
TH501
CP502
C509
R543
VR502
OS101
C505
R501
W125
R514
FB401_1
C506
D501
R511
Q501
D524
C514
CP402
L501
W888
R520
W122
D506
C443
R502
B501
C511
R542
R504_1
C123
R503
D523
Q806
T501_1
W805
R805
W873
W811
R802_2
R803
R807
Q804
W871
D806
- REPLACE AS MARKED .
W802
R554
Q401
SW102
W876
W875
R806_2
Q805
W872
D804
CP803B
C448
W874
W808
R606
W003
C628
W019
W869
R605
W007
W020
C1006
W894
C620
C624
W809
W868
W840
W011
C623
R1001
J711
Q603
D604
W039
R603
C601
C103
C106
R1010
C1005
IC1001
C1001_1
C915
W012
C702
Q602
D603
C621
R1002
W829
W852
C911
W010
Q610
R104
W005
C610
X601
C910
J712
C701
D704
W022
R1015
C617
C602
D702
C612
Q601
W021
C907
C605
W866
Q1001
W009
W017
R602
C606_1
C1009
C905
W001
W015
W006
C615
S806Y
W839
W023
C903
W008
R1014
W027
C904
F-1
D410
R421
R422
R425
D405
R429
C433
CP803A
C407_1
C434
R433
D411
C410
CP601
W142
W130
C919
W033
W129
W036
W035
W037
W040
W031
W030
W815
F-2
PRINTED CIRCUIT BOARDS
MAIN/CRT (CHIP MOUNTED PARTS)
SOLDER SIDE
R903
R1005
R1006
R1008
IC901
C908
R311
C1003
C913
R906
C912
C1002
C1004
C916 C918
R1003
C917
R904
R308
C914
R006
C001
R004 R003
R437
R404
B_SHORT
R534
R532
R505
C513
R507
R513
C519
R533
C512
C603
R601
R734
C604_1
C609
R120
R604
C113
R733
C107
R103
25
R102
C104
C105
C108_1
C102
41
R607
IC101
R740
1
C626
R610
R111
R627
C627_1
64
R609 C629
R129
R133
R113
R110
R628
R621
R105
C115
R616
C114
R617
R106
C101
R109
R506
R128
R814
R816
C810
R817
R126
R813
R809
R812
C811
C809
R811
R815
R818
F-3 F-4
ABC D E F GH
8
7
1 CNVSS
2 XIN
3 XOUT
4 TEST1
5 VSS
6
6 MCU VCC
7 TEST0
8 FILT
9 HLT
10 VHOLD
11 CVIN
12 RESET IN
13 MCU RESET OUT
14 Y SW OUT
15 V/C GND
16 3.58 XTAL
17 C-APC
5
18 MCU5.7V REG OUT
19 NC
20 CVBS IN3
21 AUDIO IN3
22 V/C VCC
23 MCU TEST
24 CVBS IN2
25 AUDIO IN2
26 CVBS IN1
27 AUDIO IN1
28 5.7V REG OUT
29 C(Y/C) IN
4
30 Y(Y/C) IN
31 VREG VCC
32 FSC OUT
33 MONITOR OUT
34 AUDIO ATT OUT
35 AUDIO ATT FILTER
36 TEST3
37 V RAMP F/B
38 V RAMP OUT
39 V RAMP CAP
40 8.7V REG OUT
41 NC
42 HVCO F/B
43 AFC FILTER
44 DEF GND
45 FBP IN
46 H OUT
47 DEF VCC
48 NC
49 HI VCC
50 R OUT
51 G OUT
52 B OUT
53 ACL
54 NC
55 PROTECT
56 SDA
57 H_CTL
58 SCL
59 NC
60 NC
61 NC
62 DEGAUSS_H
63 STANDBY_H
64 VOLUME
65 NC
66 AFT
67 KEY1
68 KEY2
69 POWER_ON
70 REMOCON
71 AV2
72 AV1
73 AUDIO_MUTE
74 X-RAY
75 IIC_OFF
76 ON_TIMER
77 BBE
78 POWER FAIL
79 X-RAY_TEST
80 EXT_MUTE
R129
2.2K
R123
2.2K 1/4W
3
2
1
NOTE:THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME
OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE
ABC D E F GH
-
MICON/CHROMA/TUNER SCHEMATIC DIAGRAM
1234
E0VCC
IC199
MEMORY IC
S-24C04BDP-LA
C118
C101
1006.3V KA
0.01 F
AT+5V
R108 100 1/4W
SDA
R107 100 1/4W
SCL
VOLUME
AFT
KEY1 V_OUT
R113
KEY2 V_FEEDBACK
2.2K
POWER_ON
R115
22K 1/4W
REMOCON
AUDIO_MUTE
X-RAY
R125
47K 1/4W
IIC_OFF
POWER_FAIL
AT+5V
REMOCON
R143
47 1/4W
1016V KA
C123
0
4.9
4.8 123
B+
GND
Vout
OS101
RPM7138-H5
0000
E2
E1
MODE
4.9 0
R127
1K 1/4W
CH UP
NOTE:THE DC VOLTAGE AT EACH PART WAS MEASURED
VSS
SCL
SDA
5678
5.0 5.0
C115
100P CH
C114
100P CH
R105
R133 22K
R106 3.3K
R111
47K
MICON/CHROMA IC
IC101
OEC7091A
R128
560
SW101
WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.
CH DOWN
EVQ21505R
SW102
0
SW
4.9
Q609
KTC3198
0
R628
IIC
TIM
INT
PWM
AD
W809
DEGAUSS_H
00
I/O
3
NC
R101
560 1/4W
SW104
PROTECT
R110 R109 10K
2.0
ROM RAM
XO
4
KEY2
EVQ21505R
0
CLAMP_OFF
3.3K R131_1
10K 1/4W
R130
22K 1/4W
0
6566676869
0
2.4
4.9
4.9
4.8
70717273747576777879
4.8
NC
4.8
NC
4.9
2.0
4.9
0
NC
0
NC
4.6
0
4.9 NC
1 101112131415161718
0 0 4.9 4.9 0 4.9 0 3.0 0.8 3.4 4.8 4.8 3.4 0 3.3 2.8 5.5 0.0 0
R126
2.7K
VOL UP
SW103
VOL DOWN
EVQ21505R
EVQ21505R
KEY1
POWER
1K
CPU core
C102
0.01 F
C103
POWER_ON
10K
MCU GND
22010V YK
SW105
EVQ21505R
P.CON+5V
OSD
CCD
VCO
7
C104
R102
R618
8.2K 1/4W
H_CTL
8809
1.1
150V KA
0.01 F
C106
1K
1K
R103
C107
C105 470P B
R617
PROTECT
NC
0.05.04.25.000
IIC BUS
DECODER
SDA/SCL
P-ON CONT
CLK CONT
0.001 B
C108_1
R120
R104
220P B
ATTENTION
1016V KANP
C633
68K
ABCL
D606 11E1-EIC
R616
3.9K
Power Manage.
MCU RESET
MCU CLK
470
C113
1M 1/4W
G.OUT
R.OUT
B.OUT
R614 100 1/4W
R615 100 1/4W
5
PGB OUTPUT Stage DRIVE CUT-OFF HV BLK
C602
150V KA
C601
820P W
W816
:LES PIECES REPAREES PAR UN ETANT
R609
R613 100 1/4W
6
7
Hor.Proc. SYNC SEPA/Hor.VCO Hor.COUNT DOWN AFC-1/H COINCIDENT AFC-2 H PHASE
RGB Proc.2 OSD SW CONTRAST BRIGHTNESS
Vldeo Proc. C-TRAP/YDELAY SHARPNESS
BLACK STRETCH Y MUTE
LPF
6bB AMP
VCXO
0.1 F X601
100CT3R505
3.579545MHz
C603
22P CH
0.022 F
C604_1
C605
R601
AT+5V
4.9 8.8
DANGEREUSES AN POINT DE VUE SECURITE N’UTILISER QUE CELLS DECRITES DANS LA NOMENCLATURE DES PIECES
(MAIN PCB)
R620
1K 1/4W
3
H_SYNC
C630
16V
100
KA
R611
120K
C629
0.01 F
R602
150V KA
8.2K
5.5
10K 1/4W
R627
10K
2.08.3NC08.35.05.05.03.84.9
6.6
RGB Proc.1 RGB MATRIX COLOR CONT
Chroma Proc. ACC/C-BPF APC/KILLER TINT/DEMO
192 20 21 22 23 24
NC
100 1/4W
C609
0.01 F
47010V YK
C606_1
5V REG
Q601
KTC3203_Y
2
R610
C628
Ver.Proc.
Ver SYNC SEP Ver.COUNT DOWN V RAMP
4.9 0 1.9
0
NC
C610
476.3V KA
R603
120 1/4W
5.6K
150V KA
F
C626 0.01 F
C627_1 0.01
NC
03.73.50
41424344454647484955051525354555657585966061626364
ATT
NC
R621
220
H_OUT
C624 163V MKT
8.7
40
4.8
4
4.4
2.5
R606
27K 1/4W
0
2.8 NC
3.5 NC
0.7 NC
3.0 NC
9.0
2.9 NC
30 31 32 33 34 35 36 37 38 39
2.6 NC
5.6
2.2 NC
1.9
2.2
25 26 27 28 29
NC
C615
150V KA
CAUTION
H.CTL
Q607
KTC3198
5.06.0
5.6
W889
H_CTL
R604
100
C612
VIDEO_IN
150V KA
TU_VIDEO
:SINCE THESE PARTS MARKED BY
CRITICAL FOR SAFETY,USE ONES DESCRIBED IN PARTS LIST ONLY
P.CON+5V
P.CON+5V
TUNER+5V
STEREO+5V
D603
1SS133
C617
C623
4716V YK
R607
100
10010V YK
8.5
C620
0.01 F
MTZJ8.2B
5V REG
Q602
KTC3203_Y
5V REG
Q603
KTC3203_Y
5V REG
Q610
KTC3203_Y
C621
D604
7.9
11.3
4716V YK
5.5
5.5
5.5
8V REG
Q606
KTC3203_Y
4.9
7.2
7.2
4.9
7.2
5.0
ARE
R605
180 1/2W
R629_1
27 3W
115-V-K015AR_B
W830
ACCESSORY
TM101
RC-DW130
R608
1K 1/4W
19
TU001
20
R.SIGNAL G.SIGNAL
B.SIGNAL DEFLECTION SIGNAL AUDIO SIGNAL TUNER VIDEO SIGNAL
8
FROM/TO DEFLECTION/CRT
7
6
UNREG+12V
CLAMP
CLAMP_OFF
V_OUT
GND
V_FEEDBACK
ABCL
H_OUT
X-RAY
R.OUT
G.OUT
B.OUT
H_SYNC
FROM/TO TV POWER
REMOTE+12V
POWER_FAIL
UNREG+12V
DEGAUSS_H GND TU+BT
5
FROM AV
VIDEO_IN
GND
REMOTE+12V
CP601
173979-7
4
3
7
6
5
4
3
2
1
2
C001
10006.3V YK
0.022 F
D001
R006
MTZJ33B
330
W815
R003
100
68K 1/2W
R002
68K 1/2W
S806YS806X
R004
R001
TUNER+5V
100
SCL
SDA
AFT
TU_AUDIO
TU+BT
TU_VIDEO
AUDIO_OUT_R
AUDIO_OUT_L
IIC_OFF
SDA
SCL
FROM/TO SOUND
AUDIO_OUT_R AUDIO_OUT_L
VOLUME SCL SDA GND
AUDIO_MUTE TU_AUDIO STEREO+5V
AUDIO_R
AUDIO_L
IIC_OFF
PCB010 TMC563
TEST POINT
GND
SDA
SCL
GND
18
0.022 F
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
C002
NC
NC
NC
NC
NC
NC
NC
R005
100 1/4W
NC
NC
C004
21
1
G-2
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