DAEWOO DTH-21S7STF, DTH-21S7STFB, DTH-21S8STF, DTH-21S8STFB, DTQ-21S7STF Service Manual

...

Caution

: In this Manual, some parts can be changed for improving. their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List)in Service Information Center.

Service Manual

Color Television

S/M No : TCM111S001

May. 2008

CHSSIS MODEL

DTH-21S7STF DTH-21S7STFB

CM-111S

DTH-21S8STF DTH-21S8STFB

DTQ-21S7STF

CN-111S DTQ-21S7STFB

DTQ-21S8STF DTQ-21S8STFB

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SAFETY PRECAUTIONS 2 SPECIFICATIONS 3 CIRCUIT BLOCK DIAGRAM 4 ALIGNMENT INSTRUCTIONS 5

YOUR REMOTE CONTROL 5 SERVICE MODE ADJUSTMENT 6 ASSEMBLY ADJUSTMENT 8

IC DESCRIPTION 11

UOC-TOP-80 11 LA78040-TV VERTICAL OUTPUT 16 STC403 EW Driver 18 24WC16-16 KB EEPROM 21 LA42072N 22

STR-6754 25 WAVEFORMS 28 TROUBLE SHOOTING GUIDE 29

NO POWER 29

NO PICTURE 30

NO SOUND 31

CH DON’T MEMORY or SKIP 32

NO COLOR 33

NO VERTICAL DEFLECTION OR PINCUSHION BADNESS 33

REMOTE CONTROL DOESNOT OPERATE 34 ELECTRICAL PARTS LIST 35 PRINTED CIRCUIT BOARD 52 SCHEMATIC DIAGRAM 54 EXPLODE VIEW 55

TABLE OF CONTENTS

APPENDIX(Appendix is provide only by internet[http://svc.dwe.co.kr])

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SAFETY PRECAUTIONS

CAUTION : DO NOT ATTEMPT TO MODIFY THIS PRODUCT IN ANY WAY. NEVER PERFORM CUSTOMIZED INSTALLATIONS WITHOUT MANUFACTURER'S APPROVAL. UNAUTHORIZED MODIFICATIONS WILL NOT ONLY VOID THE WARRANTY, BUT MAY LEAD TO YOUR BEING LIABLE FOR ANT RESULTING PROPERTY DAMAGE OR USER INJURY. SERVICE WORK SHOULD BE PERFORMED ONLY AFTER YOU ARE THOROUGHLY FAMILIAR WITH ALL OF THE FOLLOWING SAFETY CHECKS AND SERVICING GUIDELINES. TO DO OTHERWISE, INCREASES THE RISK OF POTENTIAL HAZARDS AND INJURY TO THE USER. WHILE SERVICING, USE AN ISOLATION TRANSFORMER FOR PROTECTION FROM A.C. LINE SHOCK.

SAFETY CHECKS

AFTER THE ORIGINAL SERVICE PROBLEM HAS BEEN CORRECTED, A CHECK SHOULD BE MADE OF THE FOLLOWING:

SUBJECT:FIRE & SHOCK HAZARD

1. BE SURE THAT ALL COMPONENTS ARE POSITIONED IN SUCH A WAY AS TO AVOID POSSIBILITY OF ADJACENT COMPONENT SHORTS. THIS IS ESPECIALLY IMPORTANT ON THOSE MODULES WHICH ARE TRANSPORTED TO AND FROM THE REPAIR SHOP.

2. NEVER RELEASE A REPAIR UNLESS ALL PROTECTIVE DEVICES SUCH AS INSULATORS, BARRIERS, COVERS, SHIELDS, STRAIN RELIEFS, POWER SUPPLY CORDS, AND OTHER HARDWARE HAVE BEEN REINSTALLED PER ORIGINAL DESIGN. BE SURE, THAT THE SAFETY PURPOSE OF THE POLARIZED LINE PLUG HAS NOT BEEN DEFEATED.

3. SOLDERING MUST BE INSPECTED TO DISCOVER POSSIBLE COLD SOLDER JOINTS, SOLDER SPLASHES OF SHARP SOLDER POINTS. BE CERTAIN TO REMOVE ALL LOOSE FOREIGN PARTICLES.

4. CHECK FOR PHYSICAL EVIDENCE OF DAMAGE OR DETERIORATION TO PARTS AND COMPONENTS, FOR FRAYED LEADS, DAMAGED INSULATION (INCLUDING A.C. CORD), AND REPLACE IF NECESSARY. FOLLOW ORIGINAL LAYOUT, LEAD LENGTH AND DRESS.

5. NO LEAD OR COMPONENT SHOULD TOUCH A RECEIVING TUBE OR A RESISTOR RATED AT 1 WATT OR MORE. LEAD TENSION AROUND PROTRUDING METAL SURFACES MUST BE AVOIDED.

6. ALL CRITICAL COMPONENTS SUCH AS FUSES, FLAMEPROOF RESISTOR, CAPACITORS, ETC. MUST BE REPLACED WITH EXACT FACTORY TYPES. DO NOT USE REPLACEMENT COMPONENTS OTHER THAN THOSE SPECIFIED OR MAKE UNRECOMMENDED CIRCUIT MODIFICATIONS.

7. AFTER RE-ASSEMBLY OF THE STE ALWAYS PERFORM AN A.C. LEAKAGE TEST ON ALL EXPOSED METALLIC PARTS OF THE CABINET. (THE CHANNEL SELECTOR KNOB, ANTENNA TERMINALS, HANDLE AND SCREWS) TO BE SURE THE SET IS SAFE TO OPERATE WITHOUT DANGER OF ELECTRICAL SHOCK. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS TEST USE AN A.C. VOLTMETER, HAVING 5000 OHMS PER VOLT OR MORE SENSITIVITY, IN THE FOLLOWING MANNER : CONNECT A 1500 OHM 10 WATT RESISTOR, PARALLELED BY A .15 MFD. 150V A.C. TYPE CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND (WATER POPE, CONDUIT, ETC.) AND THE EXPOSED METALLIC PARTS, ONE AT A TIME. MEASURE THE A.C. VOLTAGE ACROSS THE COMBINATION OF 1500 OHM RESISTOR AND .15 MFD CAPACITOR. REVERSE THE A.C. PLUG AND REPEAT A.C. VOLTAGE MEASUREMENTS FOR EACH EXPOSED METALLIC PART. VOLTAGE MEASURED MUST NOT EXCEED .75 VOLTS R.M.S THIS CORRESPONDS TO 0.5 MILLIAMP A.C. NAY VALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY.

SUBJECT : X-RADIATION

1. BE SURE PROCEDURES AND INSTRUCTIONS TO ALL SERVICE PERSONNEL COVER THE SUBJECT OF X-RADIATION. THE ONLY POTENTIAL SOURCE OF X-RAYS IN CURRENT T.V. RECEIVERS IS THE PICTURE TUBE. HOWEVER, THIS TUBE DOES NOT EMIT X-RAYS WHEN THE HIGH VOLTAGEISATTHEFACTORYSPECIFIEDLEVEL.THEPROPERVALUEISGIVEN IN THE APPLICABLE SCHEMATIC. OPERATION AT HIGHER VOLT-AGES MAY CAUSE A FAILURE OF THE PICTURE TUBE OR HIGH VOLTAGE SUPPLY AND UNDER CERTAIN CIRCUMSTANCES, AMY PRODUCE RADIA-TION IN EXCESS OF DESIRABLE LEVELS.

2. ONLY FACTORY SPECIFIED C.R.T ANODE CONNECTORS MUST BE USED.DEGAUSSING SHIELDS ALSO SERVE AS X-RAY SHIELD IN COLOR SETS. ALWAYS RE-INSTALL THEM.

3. IT IS ESSENTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE AN ACCURATE AND RELIABLE HIGH VOLTAGE METER. THE CALIBRATION OF THE METER SHOULD BE CHECKED PERIODICALLY AGAINST A REFERENCE STANDARD. SUCH AS THE ONE AVAILABLE AT YOUR DISTRIBUTOR.

4. WHEN THE HIGH VOLTAGE CIRCUITRY IS OPERATING PROPERLY THERE IS NO POSSIBILITY OF AN X-RADIATION PROBLEM. EVERY TIME A COLOR CHASSIS IS SERVICED, THE BRIGHTNESS SHOULD BE RUN UP AND DOWN WHILE MONITORING THE HIGH VOLTAGE WITH A METER TO BE CERTAIN THAT THE HIGH VOLTAGE DOES NOT EXCEED THE SPECIFIED VALUE AND THAT IT IS REGULATING CORRECTLY. WE SUGGEST THAT YOU AND YOUR SERVICE ORGANIZATION REVIEW TEST PROCEDURES SO THAT VOLTAGE REGULATION IS ALWAYS CHECKED AS A STANDARD SERVICING PROCEDURE, AND THAT THE HIGH VOLTAGE READING BE RECORDED ON EACH CUSTOMER’S INVOICE.

5. WHEN TROUBLESHOOTING AND MAKING TEST MEASUREMENTS IN A PRODUCT WITH A PROBLEM OF EXCESSIVE HIGH VOLTAGE, AVOID BEING UNNECESSARILY CLOSE TO THE PICTURE TUBE AND THE HIGH VOLTAGE SUPPLY. DO NOT OPERATE THE PRODUCT LONGER THAN IS NECESSARY TO LOCATE THE CAUSE OF EXCESSIVE VOLTAGE.

6.REFER TO HV, B+ AND SHUTDOWN ADJUSTMENT PROCEDURES DESCRIBED IN THE APPROPRIATE SCHEMATIC AND DIAGRAMS (WHERE USED).

SUBJECT : IMPLOSION

1. ALL DIRECT VIEWED PICTURE TUBES ARE EQUIPPED WITH AN INTEGRA IMPLOSION PROTECTION SYSTEM. BUT CARE SHOULD BE TAKEN TO AVOID DAMAGE DURING INSTALLATION. AVOID SCRATCHING THE TUBE. OF SCRATCHED REPLACE IT.

2. USE ONLY RECOMMENDED FACTORY REPLACEMENT TUBES.

SUBJECT : TIPS ON PROPER INSTALLATION

1. NEVER INSTALL ANY PRODUCT IN A CLOSED-IN RECESS, CUBBYHOLE OR CLOSELY FITTING SHELF SPACE, OVER OR CLOSE TO HEAT DUCT, OR IN THE PATH OF HEATED AIR FLOW.

2. AVOID CONDITIONS OF HIGH HUMIDITY SUCH AS: OUTDOOR PATIO INSTALLATIONS WHERE DEW IS A FACTOR, NEAR STEAM RADIATORS WHERESTEAMLEAKAGEISAFACTOR,ETC.

3. AVOID PLACEMENT WHERE DRAPERIES MAY OBSTRUCT REAR VENTING. THE CUSTOMER SHOULD ALSO AVOID THE USE OF DECORATIVE SCARVES OR OTHER COVERINGS WHICH MIGHT OBSTRUCT VENTILATION.

4. WALL AND SHELF MOUNTED INSTALLATIONS USING A COMMERCIAL MOUNTING KIT, MUST FOLLOW THE FACTORY APPROVED MOUNTING INSTRUCTIONS. A PRODUCT MOUNTED TO A SHELF OR PLATFORM MUST RETAIN ITS ORIGINAL FEET (OR THE EQUIVALENT THICKNESS IN SPACERS)TO PROVIDE ADEQUATE AIR FLOW ACROSS THE BOTTOM, BOLTS OR SCREWS USED FOR FASTENERS MUST NOT TOUCH ANY PARTS OR WIRING. PERFORM LEAKAGE TEST ON CUSTOMIZED INSTALLATIONS.

5. CAUTION CUSTOMERS AGAINST THE MOUNTING OF A PRODUCT ON SLOPING SHELF OR A TILTED POSITION, UNLESS THE PRODUCT IS PROPERLY SECURED.

6. A PRODUCT ON A ROLL-ABOUT CART SHOULD BE STABLE ON ITS MOUNTING TO THE CART. CAUTION THE CUSTOMER ON THE HAZARDS OF TRYING TO ROLL A CART WITH SMALL CASTERS ACROSS THRESHOLDS OR DEEP PILE CARPETS.

7. CAUTION CUSTOMERS AGAINST THE USE OF A CART OR STAND WHICH HAS NOT BEEN LISTED BY UNDERWRITERS LABORATORIES. INC. FOR USE WITH THEIR SPECIFIC MODEL OF TELEVISION RECEIVER OR GENERICALLY APPROVED FOR USE WITH T.V.S OF THE SAME OR LARGER SCREEN SIZE.

8. CAUTION CUSTOMERS AGAINST THE USE OF EXTENSION CORDS, EXPLAIN THAT A FOREST OF EXTENSIONS SPROUTING FROM A SINGLE OUTLET CAN LEAD TO DISASTROUS CONSEQUENCES TO HOME AND FAMILY.

THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL, WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRES-ENCE OF UNINSULATED “DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK.

THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION ON SERVICE LITERATURE.

SUBJECT : GRAPHIC SYMBOLS

10WATT

GOOD EARTH GROUND

SUCH AS THE WATER PIPE, CONDUIT, ETC.

1500 OHM

A.C. VOLTMETER

PLACE THIS PROBE ON EACH EXPOSED METAL PART

0.15 uF

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SPECIFICTION

Model

DTH-21S7STF / 21S7STFB / 21S8STF / 21S8STFB

Item

DTQ-21S7STF / 21S7STFB / 21S8STF / 21S8STFB

CHASSIS CM-111S TV Standard NTSC-M(CN-111S), NTSC-M / PAL-M / PAL-N(CM-111S) Power Input AC 110V ~ 220V, 50/60 Hz Power Consumption 85W Tuning System Frequency Synthesizer(FS) Tuning System Tuning Ranges TV VHF(L) : CH2 - CH6

UHF(H) : CH7 - CH13 UHF : CH14 - CH69

CATV VHF(L) : 5A, A,B,A-5-A-1,CH2-CH6

VHF(H) : C-W+11,CH7 - CH13

UHF : W+12-W+84 Sound Output 5W + 5W Speaker 8 ohm 5W x 2EA Antenna Input Impedance 75 ohm Unbalanced Auxiliary Input Terminal Side: Video, Audio(L,R) - AV2, Headphone

Rear : Video, Audio(L,R) - AV1

Y, Cb, Cr, Audio(L,R) - CVI Intermediate Frequencies Picture IF Carrier Frequency : 45.75MHz

Sound IF Carrier Frequency : 41.25MHz Color Sub-Carrier Frequency : NTSC-M : 3.579545 Mhz PAL-N : 3.582056 Mhz

PAL-M : 3.575611 Mhz Remote Control R-48C04(AAA) Special Function 1) Closed Caption

2) Channel Label

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CIRCUIT BLOCK DIAGRAM

BSC29

CM-111S / CN-111S

Micro Processor

CVBS / Y Switching

Sound Control

Chroma / Video Decoding

Deflection

#12,14

#45,46

#42

#76,77

#4,5,62,75 #80 #47,48 #49 #20 #11,18,35,55 #10 #21 #6,7,8

#29 #28,30 #31

#32,33

#25,26

I701 UOC-TOP

EW.TR

Q403

STC403

+15V

-15V

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ALIGNMENT INSTRUCTION

Your Remote Control(R-48C04)

1. POWER

Use this button to turn your TV on or off.

2. MUTE

Use to turn the TV’s sound on and off.

3. WCHV

Use these buttons to change channels on your TV, or select items in the menu system.

4. C

VOL

Use these buttons to change your TV's volume, to activate selections in the menu system, or to change audio and video settings.

5. MENU

Use this button to turn the TV’s menu system on and off.

6. DISPLAY

Use this button to display the present status.

7. INPUT

Use this button to select the TV’s signal source.

8. VIDEO

Use this button to display video adjustment items.

9. 0-9

Use these buttons to change channels.

10. SLEEP

Use this button to program the TV to turn off after a certain time.

11. PREVIOUS

Use this button to return to the previous channel you were watching.

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ALIGNMENT INSTRUCTION

1. SERVICE MODE ADJUSTMENTS Follow the steps below whenever service adjustment is required. See Table- A and Table- B to determine if service adjustments are required.

1) How to enter the service mode using the user remote control.

- Turn the set on.

- Direct the remote control to the reception window of TV.

- Push buttons of remote control in sequence as follows.

1 MUTE DISPLAY MUTE

- Then, the screen will appear as follows.

SERVICE 72 SERVICE 02 SERVICE 03 SERVICE 04 SERVICE 05 SERVICE 06 SERVICE 07 SERVICE 08 SERVICE 09 SERVICE 10 SERVICE 11 SERVICE 12

VWSELECT CBADJUST L EXIT

- Using the channel up or channel down button, select the item you wish to adjust. (The color of selected item turns into the blue.)

Press the volume up or down button to enter in the service mode you wish to adjust.

2) How to memorize the adjusted values in the service mode.

-Don t have to press any button the state which the screen is displaying each of service menus after all adjustments are completed each of all service menu.

Table-A : Adjust the values of service mode when a part is replaced.

PART ADJUSTMENT

NOTES

REPLACED NECESSARY UNNECESSARY

IC701 O Data is stored in I702.

(U-COM)

Initial setting values are written from IC701.

I702 ADJUSTING ITEMS

(EEPROM) O S6 : Geometry adjustmrnt

S8 : White balance S9 : Subbrightness

Adjust items related to picture tube only.

CRT O (White Balance adjustment)

CRT OPTION (Screen Option adjustment)

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ALIGNMENT INSTRUCTION

MODE NAME CM/N-111S REMARK

S1 HEAT RUN

ON OFF

S2 SCREEN ADJUST 650V (6AE:EA)

ACC AUTO Off

ACC LEVEL 24

IF OFF 37

QSS 1

DSG 1

Fine Tunning

ISP-Mode Off

V-SLOPE 34

V.CENTER 34

V.SIZE 25

H.CENTER 45

H.SIZE 57

V.LINEARITY 27

S_CORRECTION 25

H.PARALLEL 25

H-BOW 29

PARABOLA 44

EW TRAPEZ 38

CORNER TOP 47

CONET BOTTOM 46

50Hz.HC +9

50Hz.HS +1

50Hz.VC +7

50Hz.VS 0

HBL 1

WBF 5

WBR 10

S7-1

CFCLF 0

YD TV 7

DTR 0

BPYD 1

TC12X 0

PF 3

TRF 1

NRR 0

WS 3

BLS 0

DSK 0

AAS 0

BSD 0

BKS 1

DSA 1

RPO 2

RPA 2

MODE NAME CM/N-111S REMARK

S7-2

SOC 3

PWLDAC 3

CL 10

GAM 0

ACL 0

BPS 0

CHSE 0

CBPS 0

CB 0

R-GAIN 32

G-GAIN 32

B-GAIN 45

R-BIAS 32

G-BIAS 32

B-BIAS 32

SCR R-BIAS 0

SCR G-BIAS 0

SCR B-BIAS 0

CVI R-BIAS -6

CVI G-BIAS 8

CVI B-BIAS 10

DP-Brightness 17

DP-Contrst 17

DP-Color 5

DP-Sharpnes 17

OPTION 1 1111 0001

OPTION 2 0110 0011

OPTION 3 0000 0011

FACTORY SET

MODE NAME Address DATA

SCREEN Bright BAE

LG-DA

AGC_S SF5 ~ SF8 19 (hex)

AGC_Stop SF2 26 (hex)

Bright 668 12 (hex)

Color 66A 16 (hex)

Sharpness 66B 27 (hex)

Tint 66C 1F (hex)

MODE NAME DATA

AIR / CABLE AIR

VOLUME CENTER (32)

MEMORY CH

AIR : 3,4,5,7,8,10,11,13,32,48

CATV : 36,96

Language English

Power Restore ON

Close Caption C1

Blue Back OFF

Table-B : CM/N-111S(DTH/Q-21S7STF) EEPROM DATA

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ALIGNMENT INSTRUCTION

2. ASSEMBLY ADJUSTMENTS

1) SCREEN ADJUSTMENT (S2) Enter the service mode and select service adjustment S2.

You can see the one horizontal line on the screen. Adjust the Screen Control Volume (located on FBT) so that the horizontal line

onscreen may be disappeared.

Press S2 button to exit in the screen adjustment mode.

2) FOCUS ADJUSTMENT Turn in a local station and adjust the Focus Control knob (located on FBT) for best

picture details at high light condition.

3) AGC ADJUSTMENT Adjust the antenna signal level at 60 dBuV

Tune a colour bar pattern. Find the

"AGC"

item in service mode.

(it’s two way to entering the

"AGC"

item in service mode)

- Enter the service mode and select service adjustment S5 and select AUTO-AGC.

- Enter the service mode and select service adjustment S3.

Wait until AGC level stabilise to the optimum value.

Alternatively,

Enter the service mode and select service adjustment S5 and select AGC LEVEL. Use "Vol Up/Dwn" keys to adjust manually to the desired Tuner Take Over Point.

4) GEOMETRIC ADJUSTMENTS (S6) Select service adjustment S6

You can see the OSD as shown in below.

V,SLIPE 37 EW TR 40 V,CENTER 38 COR, TOP 51 V,SIZE 26 COR, BOT 48 H,CENTER 35 50Hz_HC +5 H,SIZE 62 50Hz_HS +1 V,LIN 24 50Hz_VC 0 S,CORR 27 50Hz_VS 0 H,PARA 29 HBL 01 H,BOW 35 WBF 05 PARA 34 WBR 10

VWSELECT CBADJUST L EXIT

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ALIGNMENT INSTRUCTION

4-2) Vertical Position Adjustment.

- Select V.SLOPE item, adjust V.SLOPE data value till the horizontal line in the centre of the video signal is just at the position where the blanking stars.

- Select V.CENTER item, adjust V.CENTER data value to center the raster properly on the screen.

4-3) Vertical Size Adjustment

- Select V.SIZE item, adjust V.SIZE data value to proper vertical size as follows.

4-4) Horizontal Position Adjustment

- Select H.CENTER item, adjust H.CENTER data value to obtain proper horizontal centering of the internal cross pattern at the left and right of the screen.

4-5). H.BOW, PARABOLA Adjustment

- Adjust the H.BOW, PARABOLA to compensate for geometrical distortion.

- You can not adjust the H.PARALLEL, H.SIZE, EW TRAPEZ, CORNER TOP and CORNER BOTTOM.

H.PARALLEL

4-6) 50Hz_Horizontal & Vertical Size, Center Adjusstment

Adjust PAL M System’s Picture Geometric whth This Mode. After Adjusting, you must turn off to save the setting values.

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ALIGNMENT INSTRUCTION

5) WHITE BALANCE ADJUSTMENT(S8) Receive a good local channel.

Enter the service mode and select service adjustment S8. You can see the OSD as shown in below.

R-GAIN 32 SRC R-BIAS 32

G-GAIN 32 SRC G-BIAS 32

B-GAIN 40 SRC B-BIAS 00

CVI R-BIAS -8

R-BIAS 32

CVI G-BIAS

CVI B-BIAS

+10

G-BIAS 32

B-BIAS 32

Using volume up or volume down, adjust service adjustment data of R-GAIN/G-GAIN/B-GAIN and

R-BIAS/G-BIAS until a good gray scale with normal whites is obtained.ALIGNMENT INSTRUCTIONS

6) DIGITAL PRESET(D.P) ADJUSTMENTS(S9)

SUBBRIGHTNESS ADJUSTMENT

Receive a good local channel. Enter the service mode and select service adjustment S9. You can see the OSD as shown in below.

DP-Contrast 17

DP-Color 5

Select DP-Brightness item, adjust DP-Brightness data value to obtain normal

brightness level.

DP-Contrast

Fixed value = 17

DP-Color

Fixed value = 5

DP-Sharpness

Fixed value = 17

7) FACTORY OUTGOING MODE (S12 : FACT) If you select the S12, then the set becomes factory outgoing status.

You can see the OSD

"SHIPPING OFF"

SELECT ADJUST EXIT

DP-Brightnes

DP-Sharpnes

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IC DESCRIPTION

1. UOC-TOP-80

Versatile signal processor for CRT TV applications

General description

The UOC-TOP-80 series is a very flexible concept which offers attractive solutions for 1fH TV receivers with CRTs. This new concept offers a complete range of products with the right price level to cover TV receivers from basic mono 14 inch sets up to the best featured large and/or wide screen stereo TV sets. The UOC-TOP-80 concept can also be used as front-end for 2fH and LCD TV receivers. The UOC-TOP-80 concept is mounted in a QFP80 package and is split up in the following ranges:

. Stereo concept. It contains a video processor with many features (more details are given in the

feature list in Section 2) and a micro controller with extensive OSD possibilities (UOCTOP_10PTXTST version). Optional functions are a Teletext- / Closed Caption decoder, a digital stereo decoder, an audio DSP. The block diagram is given in Figure 2

. AV-110 (AV-stereo) concept. The features of the analog video processor are comparable with

those of the Stereo concept, but it has an analog audio control circuit with balance, treble, bass and loudness control. Two different micro processor are available for this concept, one with OSD and Closed Captioning or Teletext and Closed Captioning features (UOCTOP_1PTXT version), the other with (extended) OSD features (UOCTOP_OSD version). The block diagram is given in Figure 1.

. AV-90 concept. This concept is nearly identical to the AV-110 concept. The only difference that it

does not contain an East-West and Scan Velocity Modulation (SVM) output. This concept is intended for 90° picture tubes.

. Mono-110 concept. The functional content of this concept is comparable with that of the AV

stereo concept, however, it has just a stereo input switch and no audio tone control circuit. The block diagram is given in Figure 1.

. Mono-90 concept. This concept is intended for 90° picture tubes. The circuit has an audio switch

for mono signals but the mono inputs can also be used as a stereo input. In this range most of the video and audio processing features have been omitted. Also this concept can be supplied with one of the two micro processors (UOCTOP_1PTXT or UOCTOP_OSD version). The block

diagram is given in Figure 3. The most important features of the complete IC series are given in the following feature lists. All packages are according to the ROHS legislation, which also means that these packages are lead-free. The ICs have supply voltages of 8V (only AV and Mono versions), 5V and 3.3V. For the Stereo concept an 1.8V supply is needed, but this can be simply derived by adding an emitter follower at a reference voltage from the device. UOC-TOP-80 is supported by a comprehensive Global TV Software Development kit to enable easy programming and fast time-to-market (see also Section 21.4 “Licenses”).

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IC DESCRIPTION

Quick reference data

-13-

IC DESCRIPTION

Block Diagram

-14-

IC DESCRIPTION

Pinning information

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IC DESCRIPTION

-16-

IC DESCRIPTION

2. LA78040_Vertical Output

Overview

The LA78040N is a vertical deflection output IC for high image quality TV and CRT displays that supports the use of a bus control system signal-processing IC. The sawtooth waveform from the bus control system signal-processing IC can directly drive the deflection yoke (including the DC component). Color TV vertical deflection system adjustment functions can be controlled over a bus system by connecting the LA78040N to a Sanyo LA768X series or LA769XX series bus control system signal-processing IC. Since the LA78040N provides a maximum deflection current of 1.7Ap-p, it is optimal for small and medium size CRTs.

Functions

Built-in pump-up circuit for low power dissipation. Vertical output circuit. Thermal protection circuit.

Specifications

Maximum Ratings at Ta = 25 Operating Conditions at Ta = 25

Parameter Symbol Conditions Ratings Unit

Pump-up block supply voltage +B2 max 34 V Output block supply voltage +B6 max 70 V Allowable power dissipation Pd max Mounted on an arbitrarily large heat sink. 9 W Deflection output current I5 max -1.4 to +1.4 Ap-o Thermal resistance

j-c

/W Operating temperature Topr -20 to +85

Storage temperature Tstg -40 to +150

Parameter Symbol Conditions Ratings Unit

Recommended supply voltage +B2 24 V Operating supply voltage range +B2op 16 to 33 V

Deflection output current I5p-p To 1.8 Ap-p

Parameter Symbol Conditions

Ratings

min typ max

Deflection output saturation voltage (lower) Vsat5-4 I5 = 0.9A 1.3 Deflection output saturation voltage (upper) Vsat6-5 I5 = -0.9A 3.2 Pump-up charge saturation voltage Vsat3-4 I3 = 20mA 1.8 Pump-up discharge saturation voltage Vsat2-3 I3 = 0.9A 3.0 Idling current Idl 20 50

Midpoint voltage Vmid 11.0 13.0

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IC DESCRIPTION

Package Dimensions

unit:mm 3286

Application Circuit Example 1 (Single power supply)

Block Diagram

+VCC(24V)

10k

33k

10k

11k

4.7

1000

1.0

330

1.0

0.1

100

10k

LA78040N

1 2 3 4 5 6 7

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