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Dantax
28TLO-82
SERVICE MANUAL
COLOR TELEVISION RECEIVER
ORIGINAL MFR'S VERSION A
Design and specifications are subject to change without notice.
SERVICING NOTICES ON CHECKING
1. 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.
6. AVOID AN X-RAY
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.
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.
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)
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.
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 Earphone jack
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 ..................................................................................................................... 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 ................................................................................................................................................ STEREO/FILTER ..................................................................................................................................... SCHEMATIC DIAGRAMS MICON/TUNER/T'TEXT ........................................................................................................................... VIF/SIF/CHROMA .................................................................................................................................... 21PIN/AV SW ........................................................................................................................................... DEFLECTION/CRT .................................................................................................................................. POWER .................................................................................................................................................... SOUND AMP ............................................................................................................................................ STEREO ................................................................................................................................................... CHOKE COIL ........................................................................................................................................... WAVEFORMS ............................................................................................................................................... MECHANICAL EXPLODED VIEW ............................................................................................................... MECHANICAL REPLACEMENT PARTS LIST ........................................................................................... ELECTRICAL REPLACEMENT PARTS LIST ............................................................................................. A1-1 A1-1 A1-1 A2-1 A3-1~A3-5 B1-1 B2-1, B2-2 C-1 C-1 C-2 D-1~D-5 E-1, E-2 F-1~F-4 F-5, F-6 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 H-1~H-3 I-1 J1-1 J2-1, J2-2
A2-1
GENERAL SPECIFICATIONS
G-1 TV System CRT CRT Size / Visual Size CRT Type Deflection Magnetic Field BV/BH 28 inch / 660.0mmV Normal 110 degree +0.45G/0.18G PAL / SECAM / MESECAM 2 Speaker Front 2.0 x 4.7 Inch 8 ohm 5.0+5.0 W 4.0+4.0 W Yes FRANCE+CCIR System B/G L 1Tuner CCIR (W/HYPER), FRENCH CATV F-Synth VHF/UHF 75 ohm PAL: E2 - E4, X - Z+2, S1 - S10, E5 - E12, S11 - S41, E21 - E69 SECAM: F2-F4, FB-FQ,F21-F69 PAL,SECAM(U&VH),SECAM(VL) 38.9,38.9,34.4MHz 33.4,32.4,40.9MHz 5.5,6.5,6.5MHZ All Band (Not CCIR CH Plan) 80 A2 / NICAM Yes 230V AC 50Hz at AC Stand by (at AC) Per Year Power Fuse Safety Circuit IC Protector(Micro Fuse) Safety Radiation X-Radiation Operation Storage 78 W at AC 230 V 50 Hz 4 W at AC 230 V 50 Hz -kWh/Year Yes Yes No CE (EN60065:98) CE NONE +5oC ~ +40 oC -20oC ~ +60 oC Less than 80% RH
Color System Speaker Position Size Impedance MAX 10%(Typical)
Sound Output PAL60Hz Broadcasting System Tuner and Receive CH
G-2
Tuning System
System Destination Tuning System Input Impedance
CH Coverage
Intermediate Frequency
Picture(FP) Sound(FS) FP-FS
G-3
Power
Auto Tuning Method Preset CH Stereo/Dual TV Sound Tuner Sound Muting Power Source Power Consumption
AC DC
Protector
G-4
Regulation
G-5 G-6
Temperature Operating Humidity
A3-1
GENERAL SPECIFICATIONS
G-7 On Screen Display Menu Menu Type Picture Contrast Brightness Colour Tint Sharpness Audio Bass Treble Balance BBE On/Off Stable Sound On/Off CH Tuning Manual Auto CH Allocation Language Clock Set On/Off Timer Set Pin Code Registration Nicam Auto Off Colour System Sound System AV2 Output Output Source Source Control Level Volume Brightness Contrast Colour Tint (NTSC Only) Sharpness Tuning Bass Treble Balance Back Light Nicam ST Stereo Tone 1/2 Pin Code AV Skip Channel Hotel Lock Sleep Timer Sound Mute G-8 G-9 OSD Language Clock and Timer Sleep Timer Max Time Step Program(On Timer / Off Timer) more than Yes Character Yes Yes Yes Yes No Yes Yes Yes Yes Yes No No Yes Yes Yes Yes Yes No No No Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes Yes Yes No Yes Yes Yes No Yes Yes Yes No Yes Yes English French German Italian 120 Min 10 Min No No -Min
Spanish
On/Off Timer Wake Up Timer Timer Back-up (at Power Off Mode)
Sec
A3-2
GENERAL SPECIFICATIONS
G-10 Remote Control Unit Glow in Dark Remocon Format Custom Code Power Source Voltage(D.C) UM size x pcs Total Keys Keys Power ( Stand By ) 1 2 3 4 5 6 7 8 9 0 / AV CH Up CH Down Volume Up / + Volume Down / Quick View Sleep Info ( CH Call ) Normal Menu Enter Mute Fine Tuning + Fine Tuning Tone 1/2 T'TEXT Keys TEXT / MIX / TV CH Up / Page Up CH Down / Page Down Red Green Yellow / Fine Tuning Cyan / Fine Tuning + F/T/B(Expand) / Normal Reveal / Skip Display Cancel Reset Reset / Tone 1/2 Hold / Status Sub Page / Quick View RC-GE No NEC 80-63 h 3V UM-4 x 2 pcs 31 Keys Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No No Yes Yes No Yes Yes No Yes Yes Yes No No No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes No Yes Yes Yes
A3-3
GENERAL SPECIFICATIONS
G-11 Features Auto Degauss Auto Shut Off Canal+ CATV Anti-theft Memory(Last CH) Memory(Last Volume) BBE Auto Search CH Allocation Channel Lock Just Clock Function Game Position CH Label VM Circuit Full OSD T'Text Text type Text Language Yes Yes No No No Yes Yes No Yes Yes No No No No No No Yes Top Text English, French, Swedish, Hungarian Finnish, Turkish, German, Dutch Portuguese, Spanish, Italian, Greek No No Lines Yes No No No Yes No Danish/English No Yes No Pole type No No No No No No No No No No No No Yes UM-4 x 2 pcs No No No No No No
Premiere Comb Filter Auto CH Memory Stable Sound Auto Set Up FBT Leak Test Protect Power ON Memory Hotel Lock Owner's Manual Remote Control Unit Rod Antenna Poles Terminal Loop Antenna Terminal U/V Mixer DC Car Cord (Center+) Guarantee Card 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-12
Accessories
Language w/Guarantee Card
A3-4
GENERAL SPECIFICATIONS
G-13 Interface Switch Front Power (Tact Sw) System Select Main Power SW Sub Power Channel Up Channel Down Volume Up Volume Down Rear AC/DC TV/CATV Selector Degauss Main Power SW Power Stand-by On Timer Front Video Input Audio Input Other Terminal Rear Video Input(Rear1) Video Input(Rear2) Audio Input(Rear1) Audio Input(Rear2) Video Output Audio Output Euro Scart(21Pin) S-INPUT Euro Scart(21Pin) RGB-INPUT Component Input Diversity Ext Speaker DC Jack 12V(Center +) VHF/UHF Antenna Input AC Outlet Approx. W x D x H (mm) Net (Approx.) Gross (Approx.) Master Carton Content Material Dimensions W x D x H(mm) Description of Origin Gift Box Material Dimensions W x D x H(mm) Design Description of Origin Drop Test Height (cm) Container Stuffing Cabinet Front Cabinet Rear Cover PCB Non-Halogen Demand Eyelet Demand Pb Free Lead-free Solder Other Cd Free No No Yes No Yes Yes Yes Yes No No No No No Yes No RCA RCA x 2 Headphone No No No No No No Yes ( x1 ) Yes ( x1 ) Yes ( x1 ) Yes ( x1 ) No No No No D Type No 711.0 x 485.0 x 546.5 30.0kg ( --- lbs) 33.0Kg ( ---lbs) No ---Sets -/--- x -- x -No Yes Double/White 779 x 565 x 641 As per Buyer's No Natural Dropping At 1 Corner / 3 Edges / 6 Surfaces 31 180 Sets/40' container PS 94HB PS 94HB PS 94V0 NON-DECABROM No No No No No
Indicator
Terminals
G-14 G-15 G-16
Set Size Weight Carton
G-17
Cabinet Material
G-18
Environment
A3-5
DISASSEMBLY INSTRUCTIONS
1. REMOVAL OF ANODE CAP
Read the following NOTED items before starting work. 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.)
* *
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. Location of Anode Cap
Fig. 1-3 GND on the CRT NOTE Confirm that there is no dirt, dust, etc. at the spot where the cap was located. 2. Arrange the wire of the Anode Cap and make sure the wire is not twisted. 3. Turn over the Rubber Cap. (Refer to Fig. 1-4.)
Screwdriver
Support Alligator Clip
CRT
GND on the CRT Fig. 1-1 2. 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.) Rubber Cap Fig. 1-4 4. Insert one end of the Anode Support into the anode button, then the other as shown in Fig. 1-5.
CRT CRT Support Fig. 1-2
Support Fig. 1-5
5. Confirm that the Support is securely connected. 6. Put on the Rubber Cap without moving any parts.
B1-1
DISASSEMBLY INSTRUCTIONS
2. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC
REMOVAL 1. Put the Masking Tape (cotton tape) around the Flat 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.
Blower type IC desoldering machine
3. 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.) 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.
Masking Tape (Cotton Tape)
IC
Tweezers
Fig. 2-1
IC
2. Heat the IC leads using a blower type IC desoldering 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.
Fig. 2-3 4. Peel off the Masking Tape. 5. Absorb the solder left on the pattern using the Braided Shield Wire. (Refer to Fig. 2-4.) NOTE Do not move the Braided Shield Wire in the vertical direction towards the IC pattern.
Blower type IC desoldering machine
Braided Shield Wire
Soldering Iron
IC pattern IC
Fig. 2-4
Fig. 2-2
B2-1
DISASSEMBLY INSTRUCTIONS
INSTALLATION 1. 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.) 4. When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thintip Soldering Iron. (Refer to Fig. 2-8.)
Thin-tip Soldering Iron
IC
Soldering Iron
Fig. 2-8 5. 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. 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.
Solder temporarily
Solder temporarily
Fig. 2-5 2. Supply the solder from the upper position of IC leads sliding to the lower position of the IC leads. (Refer to Fig. 2-6.)
Solder
Soldering Iron
IC
Supply soldering from upper position to lower position
Fig. 2-6 3. Absorb the solder left on the lead using the Braided Shield Wire. (Refer to Fig. 2-7.) NOTE Do not absorb the solder to excess.
Soldering Iron IC
Braided Shield Wire
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 Remocon Key 0 1 Releasing of V-CHIP PASSWORD. Initialization of the factory. NOTE: Do not use this for the normal servicing. If you set a factory initialization, the memories are reser such as the clock setting, the cheannel 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". VOL. (-) MIN 6 Can be checked of the INITIAL DATA of MEMORY IC. Refer to the "WHEN REPLACING EEPROM (MEMORY) IC". VOL. (-) MIN 8 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). Operations
VOL. (-) MIN
9
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". 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 2 second. 3. After the confirmation of using hours, turn off the power.
ADDRESS DATA
INIT
01
10
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)
CRT ON 0010
FIG. 1
C-1
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. Note: No need setting for after INI16 due to the adjustment value. INI 00 10 +0 --20 +1 10 00 +2 38 80 +3 29 80 +4 24 80 +5 30 04 +6 80 80 +7 40 --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.
ADDRESS DATA
+8 30 ---
+9 4D ---
+A 81 ---
+B 01 ---
+C 03 ---
+D 00 ---
+E 06 ---
+F 72 ---
INIT 01 10 CRT ON 0010
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. Press both VOL. DOWN button on the set and Channel button (1) on the remote control for more than 2 seconds. 11. After the finishing of the initializing of shipping, the unit will turn off automatically. The unit will now have the correct DATA for the new MEMORY IC.
C-2
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. · When you exchange IC and Transistor for a heat sink, apply the silicon grease (YG6260M) on the contact 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. Pattern Generator On-Screen Display Adjustment 1. In the condition of NO indication on the screen. Press the VOL. DOWN button on the set and the Channel button (9) on the remote control for more than 2 seconds to appear the adjustment mode on the screen as shown in Fig. 1-1.
NO.
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
FUNCTION
CUT OFF RF AGC AGC GAIN R DRIVE R CUT OFF G DRIVE G CUT OFF B DRIVE H POSI 50 V POSI 50 V POSI 60 V SIZE 50 V SIZE 60 VCO COASE VCO FINE VCO COARSE L1 VCO LINE L1 BRIGHT CENT BRIGHT MAX BRIGHT MIN TINT SHARP CONT CENT CONT MAX CONT MIN
NO.
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49
FUNCTION
COLOR CENT COLOR MAX COLOR MIN M R CUT OFF M G CUT OFF M B CUT OFF CVBS OUT APR THR BELL FILTER BANDPASS H POSI OSD V POSI OSD H POSI TXT V POSI TXT H POSI 60 V POSI 50 V POSI 60 V SIZE 50 V SIZE 60 S CORR C CORR H SIZE PIN CUSH E/W SHAPE TRAPEZ
Fig. 1-2
2. BASIC ADJUSTMENTS
2-1: AGC VOLTAGE 1. Place the set with Aging Test for more than 15 minutes. 2. Receive the VHF (HIGHT) (63±1dB). 3. Connect the digital voltmeter between the pin 5 and pin 1 (GND) of CP101. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (01) on the remote control to select "RF AGC". 5. Press the VOL. UP/DOWN button on the remote control until the digital voltmeter is 2.40 ± 0.05V. 2-2: 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 (00) on the remote control to select "CUT OFF". 3. Adjust the Screen Volume until a dim raster is obtained.
VCO Status MMM -
35 36 37 38 39 00
H POSI OSD V POSI OSD H POSI TEXT V POSI TEXT H POSI 60 CUT OFF 9- EXT
132 58 125 58 32
2-3: WHITE BALANCE Fig. 1-1 NOTE: Adjust after performing CUT OFF adjustment. 1. Place the set with Aging Test for more than 15 minutes. 2. Receive the gray scale pattern from the Pattern Generator. 3. Using the remote control, set the brightness and contrast to normal position. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (03) on the remote control to select "R DRIVE". 5. Press the Channel UP/DOWN button on the remote control to select the "R DRIVE", "G DRIVE", "M R CUTOFF" or "M G CUTOFF". 6. Adjust the VOL. UP/DOWN button on the remote control to whiten the R DRIVE, G DRIVE, M R CUT OFF, and M G CUT OFF at each step tone sections equally. 7. Perform the above adjustments 5 and 6 until the white color is looked like a white.
2. Use the Channel UP/DOWN button or Channel button (0-9) on the remote control to select the options shown in Fig. 1-2. 3. Press the MENU button on the remote control to end the adjustments.
D-1
ELECTRICAL ADJUSTMENTS
2-4: FOCUS 1. Receive the monoscope pattern. 2. Turn the Focus Volume fully counterclockwise once. 3. Adjust the Focus Volume until picture is distinct. 2-5: CONSTANT VOLTAGE 1. Place the set with Aging Test for more than 5 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. 2-6: HORIZONTAL POSITION 1. Receive the monoscope pattern. (RF Input) 2. Place the set with Aging Test for more than 15 minutes. 3. Using the remote control, set the brightness and contrast to normal position. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (08) on the remote control to select "H POSI(50)". 5. Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on right and left becomes minimum. 6. Receive the monoscope pattern of NTSC. (Audio Video Input) 7. Using the remote control, set the brightness and contrast to normal position. 8. Activate the adjustment mode display of Fig. 1-1 and press the channel button (39) on the remote control to select "H POSI(60)". 9. Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on right and left becomes minimum. 2-7: VERTICAL POSITION, VERTICAL LINEALITY 1. Receive the monoscope pattern. (RF Input) 2. Place the set with Aging Test for more than 15 minutes. 3. Using the remote control, set the brightness and contrast to normal position. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (40) on the remote control to select "V POSI(50)". 5. Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on right and left becomes minimum. 6. Activate the adjustment mode display of Fig. 1-1 and press the channel button (45) on the remote control to select "C CORR". 7. Press the VOL. UP/DOWN button on the remote control until the position of CRT CENTER line of screen and CRT CENTER marker to same. 8. Receive the monoscope pattern of NTSC. (Audio Video Input) 9. Using the remote control, set the brightness and contrast to normal position. 10.Activate the adjustment mode display of Fig. 1-1 and press the channel button (41) on the remote control to select "V POSI(60)". 11.Press the VOL. UP/DOWN button on the remote control until the Shift quantity of the OVER SCAN on right and left becomes minimum. 2-8: VERTICAL SIZE 1. Receive the monoscope pattern. (RF Input) 2. Place the set with Aging Test for more than 15 minutes. 3. Using the remote control, set the brightness and contrast to normal position. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (42) on the remote control to select "V SIZE(50)". 5. Press the VOL. UP/DOWN button on the remote control until the SHIFT quantity of the OVER SCAN on upside and downside becomes 8 ± 2%. 6. Receive the monoscope pattern of NTSC. Using the remote control, set the brightness and contrast to normal position. 7. Activate the adjustment mode display of Fig. 1-1 and press the channel button (43) on the remote control to select "V SIZE(60)". 8. 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%. 2-9: BRIGHT CENT 1. Receive the black pattern*. (RF Input) 2. Using the remote control, set the brightness and contrast to normal position. 3. Place the set with Aging Test for more than 15 minutes. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (17) on the remote control to select "BRIGHT CENT". 5. Press the VOL. UP/DOWN button on the remote control until the screen begin to shine. 6 Receive the black pattern*. (Audio Video Input) 7. Set to the AV mode. Then perform the above adjustments 2~5. *The Black Pattern means the whole black raster signal. Select the "RASTER" of the pattern generator, set to the OFF position for each R, G and B. 2-10: CONTRAST CENT 1. Receive the color bar pattern. (RF Input) 2. Using the remote control, set the brightness and contrast to normal position. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (22) on the remote control to select "CONT CENT". 4. Press the VOL. UP/DOWN button on the remote control until the contrast step No. becomes "44". 5. Receive a broadcast and check if the picture is normal. 6. Receive the color bar pattern. (Audio Video) 7. Press the TV/VIDEO button on the remote control to set to the AV mode. Then perform the above adjustments 2~5.
D-2
ELECTRICAL ADJUSTMENTS
2-11: COLOR CENT 1. 2. 3. 4. 5. Receive the color bar pattern. (RF Input) Place the set with Aging Test for more than 15 minutes. Connect the oscilloscope to TP801. Using the remote control, set the brightness, contrast and color to normal position. Activate the adjustment mode display of Fig. 1-1 and press the channel button (25) on the remote control to select "COLOR CENT". Adjust the VOLTS RANGE VARIABLE knob of the oscilloscope until the range between white 100% and 0% is set to 5 scales on the screen of the oscilloscope. Press the VOL. UP/DOWN button on the remote control until the red color level is adjusted to 90 ± 10% for the white level. (Refer to Fig. 2-1) Receive the color bar pattern. (Audio Video Input) Set to the AV mode. Then perform the above adjustments 2~7. 2-14: PIN CUSH/TRAPEZ 1. Receive the crosshatch signal from the Pattern Generator. 2. Place the set with Aging Test for more than 15 minutes. 3. Using the remote control, set the brightness and contrast to normal position. 4. Activate the adjustment mode display of Fig. 1-1 and press the channel button (49) on the remote control to select "TRAPEZ". 5. Press the VOL. UP/DOWN button on the remote control until the both vertical lines of the screen become parallel. 6. Activate the adjustment mode display of Fig. 1-1 and press the channel button (47) on the remote control to select "PIN CUSH". 7. Press the VOL. UP/DOWN button on the remote control until the right and left vertical lines are straight. 2-15: Confirmation of Fixed Value (Step No.) Please check if the fixed values of the each adjustment items are set correctly referring below. NO. 02 04 06 07 18 19 20 21 23 24 26 27 30 31 32 33 34 35 36 37 38 44 48 FUNCTION AGC GAIN R CUTOFF G CUTOFF B DRIVE BRIGHT MAX BRIGHT MIN TINT SHARP CONT MAX CONT MIN COLOR MAX COLOR MIN M B CUTOFF CVBS OUT APR THR BELL FILTER BANDPASS H POSI OSD V POSI OSD H POSI TXT V POSI TXT SCORR E/W SHAPE RF 00 00 00 45 60 15 00 03 63 05 50 10 127 31 00 06 00 132 58 125 58 04 14 AV --------60 15 00 03 63 05 50 10 -----------------------
6.
7.
8. 9.
90%
Fig. 2-1 2-12: VCO COARSE/VCO FINE 1. Place the set with Aging Test for more than 10 minutes. 2. Connect the oscillator (38.9MHz) to TP001. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (13) on the remote control to select "VCO COARSE". 4. Press the VOL. UP/DOWN button on the remote control until the "OK" appear on the screen. If the "OK" is not displayed, select the "+" side on the changed from "-" to "+". 5. Press the CH UP button once to set to "VCO FINE" mode. 6. Press the VOL. UP/DOWN button on the remote control to select the 5 step down point from the upper limit on the "OK". (Example: In case of the "OK" point 30~41, select 37.) 2-13: VCO COARSE L1/VCO FINE L1 1. Place the set with Aging Test for more than 10 minutes. 2. Connect the oscillator (33.95MHz) to TP001. 3. Activate the adjustment mode display of Fig. 1-1 and press the channel button (15) on the remote control to select "VCO COARSE L1". 4. Press the VOL. UP/DOWN button on the remote control until the "OK" appear on the screen. If the "OK" is not displayed, select the "+" side on the changed from "-" to "+". 5. Press the CH UP button once to set to "VCO FINE L1" mode. 6. Press the VOL. UP/DOWN button on the remote control to select the 5 step down point from the upper limit on the "OK". (Example: In case of the "OK" point 30~41, select 37.) D-3
ELECTRICAL ADJUSTMENTS
3. PURITY AND CONVERGENCE ADJUSTMENTS
NOTE 1. Turn the unit on and let it warm up for at least 30 minutes before performing the following adjustments. 2. Place the CRT surface facing east or west to reduce the terrestrial magnetism. 3. Turn ON the unit and demagnetize with a Degauss Coil. 3-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT) 1. Tighten the screw for the magnet. Refer to the adjusted CRT for the position. (Refer to Fig. 3-1) If the deflection yoke and magnet are in one body, untighten the screw for the body. 2. Receive the green raster pattern from the color bar generator. 3. Slide the deflection yoke until it touches the funnel side of the CRT. 4. Adjust center of screen to green, with red and blue on the sides, using the pair of purity magnets. 5. Switch the color bar generator from the green raster pattern to the crosshatch pattern. 6. Combine red and blue of the 3 color crosshatch pattern on the center of the screen by adjusting the pair of 4 pole magnets. 7. Combine red/blue (magenta) and green by adjusting the pair of 6 pole magnets. 8. Adjust the crosshatch pattern to change to white 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. Adjust the differences around the screen by moving the deflection yoke upward/downward and right/left. (Refer to Fig. 3-2-a) 2. Insert three wedges between the deflection yoke and CRT funnel to fix the deflection yoke. (Refer to Fig. 3-2-b) RGB RGB
R G B
R G B RIGHT/LEFT SLANT
UPWARD/DOWNWARD SLANT
Fig. 3-2-a
WEDGE
WEDGE
WEDGE WEDGE POSITION Fig. 3-2-b
PURITY MAGNETS 6 POLE MAGNETS 4 POLE MAGNETS Fig. 3-1
D-4
ELECTRICAL ADJUSTMENTS
4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION)
CD803
CP101
CP803A J701 CP401
CP001 CD802 TP001
FB401
STEREO PCB
TP501
CRT
TU001
TP801 J801 CP802B
R521
1 80 CD
CP802A CD502B CD502A L503
CP806 CP 80 CP803B 1
CRT PCB
T CR
VR501 CP502
S501A S501B AC IN
CP1001
CRT SPEAKER
MAIN PCB
FILTER PCB
CP504 CD502
D-5
CH UP MICON W/T.TEXT IC101 OECF008C
TU001
BLOCK DIAGRAM
CH DOWN
SCL SDA BPL AGC 7 1 IF 11
VOL UP Q103
LED DRIVE 9 STANDBY LED
4 I2C P.CON+5V
5
KEY_IN 56
VOL DOWN
STAND BY/P.ON D101 39
V-OUT IC401 STV9306B CHROMA IC201 STV2248H 1 SCL Vs 6 P.CON+25V DY
AVDD1
SDA 19 SCL 20
5 6
SDA SCL
31 AVDD2 AT+5V 25
8 RF_AGC_OUT
34 OSD-B 35 OSD-G 36 OSD-R 29 CVBSOUT1
1
SIFIN1
2
SIFIN2
6
PIFIN1
7
AVDD3
PIFIN2
OSD-B 15
OSD-G 16
MEMORY IC199 S-24C04BFJ-TB
OUT
3 SDA
5 SYNC
9
OSD-R 17 OS101
1 1 REMORT 50 OSC_OUT X101 4MHz CVBS2 33 CVBS1 34
EWOUT 11 SENS 2 SENS 1 12 14 P.CON+12V FB401 1 J801 11 6 F F 4 7 S
HV P.CON+12V 2
VERT 47 SCL 51 SDA 52 H_OUT 48 B.OUT 30 G.OUT 31 R.OUT 32
I2C
AV1 42 51 OSC_IN
FORTHD VCR1 53 FORTHD VCR2 54
40 XTAL1 X601 4.433619MHz 12 VCC_IF P.CON+5V P.CON+8V 53 VCC_D 45 VCC1 17 VCC2
Q402 H.DRIVE
Q401 H.OUTPUT Q805, Q806 BULE OUT Q803, Q804 GREEN OUT Q801, Q802 RED OUT 8
+B P.CON+25V
3
A2/NICAM/DOLBY IC902 MSP3410G-QA-B8 71 XTAL_IN X901 18.432MHz 72 XTAL_OUT
P.CON+5V
G_EXT/Y_EXT 26 B_EXT/U_EXT 25
ANA_IN1+ 67
SC1_OUT_R 36 SC1_OUT_L 37 SC2_OUT_R 33
11 FM_OUT
R_EXT/V_EXT 27 Y/CVBS_IN3 22
CVBS OUT2 44
CRT V801
INT_CVBS_OUT 13
VIDEO SW IC702 MM1501XNRE 2 1 6 4
11 DVSUP 66 AVSUP
CVBSIN2 20 CHR 23 J701
VIDEO OUT VIDEO IN VIDEO IN
SC2_OUT_L 34 SC1_IN_R 57 SC1_IN_L 56 SC3_IN_R 51 SC3_IN_L 50 R OUT L OUT R OUT L OUT R IN L IN R IN L IN 8 FOR VCR 29 FOR VCR 1 3 22 24 2 6 23 27
19 20
I2C
2 3
I2C_CL I2C_DA
P.CON+8V
39 AHVSUP
SC2_IN_L 53
DACM_R DACM_L
SC2_IN_R 54
41 40
15 7
VIDEO OUT
21-R IN 21-B IN
FRONT VIDEO J703
3
1
28
27
2
FRONT AUDIO L J704
11 21-G IN SCART IN 36
3 2
1
FRONT AUDIO R J705 SOUND+B 7 2
HEADPHONEJACK J702
3 2 SW TRANS T501
5 1
L
SOUND AMP IC IC1001 AN5276
R 2 + 5 + 10 VCC ++7 12
3 5 1
POWER IC501 STR-W6853N 1
SOUND+B
16 9
R L SPEAKER SP351
8V REG IC502 KIA78R08PI
1 2
P.CON+8V
13 11
+B
6V REG IC503 KIA78R06PI
1 2
AT+5V P.CON+5V
E-1
E-2