Zenith LSS 3200A Service Manual

SERVICE MANUAL

MODEL : LSS-3200A

CAUTION

BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL.

MODEL : LSS-3200A

SERVICE MANUAL

P/NO : 3829RVN006T

AUGUST, 2003

Printed in Korea

CONTENTS

SECTION 1 . . . .SUMMARY

SECTION 2 . . . .CABINET & MAIN CHASSIS

SECTION 3 . . . .ELECTRICAL

SECTION 4 . . . .REPLACEMENT PARTS LIST

SECTION 1

SUMMARY

CONTENTS

PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS ......... 1-3

SERVICING PRECAUTIONS .................................................................................. 1-4

• General Servicing Precautions

• Insulation Checking Prodedure

• Electrostatically Sensitive Devices

SPECIFICATIONS ................................................................................................... 1-5

1-3

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 ANY 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 CORRCTED. 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 OR 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 RECIVING TUBE OR A RESISTOR RATED AT 1 WATT OR MORE. LEAD TENSION AROUND PROTRUNING METAL SURFACES MUST BE AVOIDED.

6. ALL CRITICAL COMPONENTS SUCH AS FUSES, FLAMEPROOF RESISTORS, 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 SET 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. 150.V A.C TYPE CAPACITOR BETWEEN A KNOWN GOOD EARTH GROUND (WATER PIPE, 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 ANY VALUE EXCEEDING THIS LIMIT CONSTITUTES A POTENTIAL SHOCK HAZARD AND MUST BE CORRECTED IMMEDIATELY.

SUBJECT: GRAPHIC SYMBOLS

THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAG- NITUDE 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 IN SERVICE LITERATURE.

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 VOLTAGE IS AT THE FACTORY SPECIFIED LEVEL. THE PROPER VALUE IS GIVEN IN THE APPLICABLE SCHEMATIC. OPERATION AT HIGHER VOLTAGES MAY CAUSE A FAILURE OF THE PICTURE TUBE OR HIGH VOLTAGE SUPPLY AND, UNDER CERTAIN CIRCUMSTANCES, MAY PRODUCE RADIATION 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 ESSNTIAL THAT SERVICE PERSONNEL HAVE AVAILABLE AN ACCURATE AND RELIABLE HIGH VOLTAGE METER. THE CALIBRA TION 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 RECORDER 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 EXCES SIVE 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 INTE GRAL IMPLOSION PROTECTION SYSTEM, BUT CARE SHOULD BE TAKEN TO AVOID DAMAGE DURING INSTALLATION, AVOID SCRATCHING THE TUBE. IF 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 WHERE STEAM LEAKAGE IS A FACTOR, ETC.

3. AVOID PALCEMENT 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.

PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS

A.C. VOLTMETER

GOOD EARTH GROUND SUCH AS THE WATER PIPE. CONDUIT. ETC

PLACE THIS PROBE ON EACH EXPOSED METAL PART

1-4

SERVICING PRECAUTIONS

CAUTION : Before servicing the STB covered by this service data and its supplements and addends, read and follow the SAFETY PRECAUTIONS. NOTE : if unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions in this publications, always follow the safety precautions.

Remembers Safety First:

General Servicing Precautions

1. Always unplug the STB AC power cord from the AC power source before: (1) Removing or reinstalling any component, circuit board,

module, or any other assembly.

(2) Disconnection or reconnecting any internal electrical

plug or other electrical connection.

(3) Connecting a test substitute in parallel with an elec-

trolytic capacitor. Caution : A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard.

2. Do not spray chemicals on or near this STB or any of its assemblies.

3. Unless specified otherwise in this service data, clean electrical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner, cotton-tipped swab, or comparable soft applicator. Unless specified otherwise in this service data, lubrication of contacts is not required.

4. Do not defeat any plug/socket B+ voltage interlocks with whitch instruments covered by this service manual might be equipped.

5. Do not apply AC power to this STB and/or any of its electrical assemblies unless all solid-state device heat sinks are cerrectly installed.

6. Always connect test instrument ground lead to the appropriate ground before connection the test instrument positive lead. Always remove the test instrument ground lead last.

Insulation Checking Procedure

Disconnect the attachment plug from the AC outlet and turn the power on. Connect an insulation resistance meter(500V) to the blades of the attachment plug. The insulation resistance between each blade of the attachment plug and accessible conductive parts (Note 1) should be more than 1Mohm. Note 1 : Accessible Conductive Parts including Metal panels, Input terminals, Earphone jacks, etc.

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity.

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grouned-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static solder removal device. Some solder removal devices not classified a “anti-static” can generate electrical charges sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charge sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protec tive package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil, or comparable conductive material).

7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed.

Caution : Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Normally harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES device.)

1-5

SPECIFICATIONS

Television System Television System NTSC, Analog American Standard (480i)

ATSC, DTV standard (1080i, 720p, 480p, 480i)

DIRECTV Channel Coverage DTV 1-99 VHF 2-13 UHF 14-69 CATV 1-125 DIRECTV variable

Inputs/Output ATSC/NTSC RF Inputs Antenna (1), Cable TV (1)

(ATSC-8VSB over CATV or Terrestrial) RF Output Out To TV (1) (selectable Channel 3 or 4) DirecTV RF Input Satellite In (1)

DVI-HDTV Output DVI-HDTV Out (1), DVI-D Single Link connector

1080i, 720p, 480p digital RGB

EIA-861 Compliant, HDCP Compliant RGB Output 15-pin Connector (1)

1080i, 720p, 480p RGB Component Video Output Component Out (1), Phono Jack connector

1080i, 720p, 480p YPbPr S-Video Output S-Video Out (1), 4-pin Mini-DIN

480i Y/C Video Output Video Out (2), Phono Jack connector

480i Composite NTSC Digital Audio Optical (selectable Dolby Digital or PCM output) Analog Audio Audio Out (2) (Fixed Output Level) Access Card Smart Card (Slot on the back) Authorized Service Port 9-pin Serial Port (1)

Dimension 430mm (W) x 76.5mm (H) x 326 (D) Mass 3.84kg

Power Requirements 120V, 60Hz Power Consumption 100W (maximum)

25W (Standby) Power Line 90 VAC to 137 VAC

Environment

Humidity 0 to 99 percent non condensing Storage Temperature -20 to 60 degrees Celsius (-4 to 140 degrees Fahrenheit) Operating Temperature 0 to 40 degrees Celsius (32 to 104 degrees Fahrenheit)

* Design and specifications are subject to change without notice.

2-1

SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

EXPLODED VIEWS .....................................................................................................................2-2

1. Cabinet and Main Frame Section ...........................................................................................2-2

2. Packing Accessory Section....................................................................................................2-3

2-2

EXPLODED VIEWS

1. Cabinet and Main Frame Section

A47

260

A46

A49

A48

A42

A43

A50

280

452

A44

320

469

470

300

463

466

250

457

465

470

469

463

452

BCD

2-3

2. Packing Accessory Section

808

804

803

801

900

802

803

813

S-VIDEO CABLE

825

DVI-D CABLE

824

ANTENNA, RF

806

RF CABLE

823

TELEPHONE LINE

820

PLUG ASS'Y(3WAY)

PACKING SHEET

PACKING

BATTERY

REMOCON

BOX CARTONX

OWNER'S MANUAL

PACKING

OPTIONAL PARTS

3-1

SECTION 3

ELECTRICAL

CONTENTS

SOFTWARE CORRUPTION PROBLEM.....................................................................................................3-2

ELECTRICAL TROUBLESHOOTING GUIDE............................................................................................3-5

1. POWER(SMPS) CIRCUIT ....................................................................................................................3-5

2. AUDIO CIRCUIT ....................................................................................................................................3-7

1) NO ATSC AUDIO..................................................................................................................................3-7

2) NO DIRECTV AUDIO .........................................................................................................................3-11

3) NO NTSC AUDIO ...............................................................................................................................3-12

4) NO SPDIF OUT FOR ATSC & DIRECTV ..........................................................................................3-13

5) NO SPDIF FOR NTSC .......................................................................................................................3-14

6) NO 3/ 4 RF AUDIO.............................................................................................................................3-15

3. DIRECTV FRONT- END CIRCUIT(QPSK) ......................................................................................3-16

4. DVI CIRCUIT ........................................................................................................................................3-19

5. CPU(SYSTEM CONTROL) CIRCUIT...............................................................................................3-21

6. VIDEO CIRCUIT...................................................................................................................................3-29

7. DIRECTV TP- DEMUX /MODEM CIRCUIT .....................................................................................3-37

8. DIRECTV TP- DEMUX /MODEM CIRCUIT .....................................................................................3-39

9. ATSC/ QAM FRONT- END CIRCUIT................................................................................................3-41

10. NTSC FRONT- END CIRCUIT ........................................................................................................3-43

11. FRONT PANEL CIRCUIT .................................................................................................................3-44

12. CAM BOARD CIRCUIT ....................................................................................................................3-46

OVERALL BLOCK DIAGRAM....................................................................................................................3-47

1. OVERALL BLOCK DIAGRAM 1 ............................................................................................................3-47

2. OVERALL BLOCK DIAGRAM 2 ............................................................................................................3-49

BLOCK DIAGRAM & SIGNAL FLOW.......................................................................................................3-51

1. POWER(SMPS) BLOCK DIAGRAM ......................................................................................................3-51

2. DIRECTV BLOCK DIAGRAM & SIGNAL FLOW...................................................................................3-53

3. ATSC BLOCK DIAGRAM & SIGNAL FLOW.........................................................................................3-55

4. NTSC BLOCK DIAGRAM & SIGNAL FLOW.........................................................................................3-57

CIRCUIT DIAGRAM......................................................................................................................................3-59

1. POWER(SMPS) CIRCUIT DIAGRAM ....................................................................................................3-59

2. CPU(PPC405CR) CIRCUIT DIAGRAM ..................................................................................................3-61

3. CPU PERI, RF-REMOTE, VCR-CTRL CIRCUIT DIAGRAM..................................................................3-63

4. FRONTEND CIRCUIT DIAGRAM...........................................................................................................3-65

5. HD2 & SDRAM CIRCUIT DIAGRAM .....................................................................................................3-67

6. DIRECTV HD-STB CIRCUIT DIAGRAM ................................................................................................3-69

7. VDP I/F & DISPLAY OUTPUT CIRCUIT DIAGRAM ..............................................................................3-71

8. NTSC AUDIO PROCESSOR CIRCUIT DIAGRAM ................................................................................3-73

9. DIRECTV TP DEMUX & CAS I/F CIRCUIT DIAGRAM .........................................................................3-75

10. 2400 BPS ISO MODEM CIRCUIT DIAGRAM ......................................................................................3-77

11. POWER REGULATION CIRCUIT DIAGRAM.......................................................................................3-79

12. CAM I/F CIRCUIT DIAGRAM ...............................................................................................................3-81

13. FRONT (2R, VFD, KEY-SCAN) CIRCUIT DIAGRAM ..........................................................................3-83

14. FRONT POWER KEY CIRCUIT DIAGRAM .........................................................................................3-85

PRINTED CIRCUIT DIAGRAMS ................................................................................................................3-87

1. DIGITAL MAIN P.C.BOARD(BOTTOM)..................................................................................................3-87

2. DIGITAL MAIN P.C.BOARD(TOP)..........................................................................................................3-89

3. CAM P.C.BOAR(BOTTOM) ....................................................................................................................3-91

4. CAM P.C.BOAR(TOP) ............................................................................................................................3-92

5. POWER P.C.BOARD ..............................................................................................................................3-91

6. TIMER P.C.BOARD.................................................................................................................................3-93

7. KEY P.C.BOARD ....................................................................................................................................3-95

SOFTWARE CORRUPTION PROBLEM

3-2

1. Symptom of problem

Software corruption problem occurs when IRD is unplugged while an upgrade of new software from satellite is in progress or application program of FLASH is damaged by other problem. In this case, IRD appear “DOWNLOAD” on VFD and is displayed on message box of TV or monitor as below [Figure 1-1].

2. Solution of problem

To solve this problem you must rewrite application on FLASH and make following preparation.

1) Terminal emulation program transmitted in binary mode. (Ex: Tera Term)

2) 1:1 RS-232C serial cable with male to female connector.

3) Compressed application image of new version (Ex: rom.pak)

First, connect serial port of PC and RS-232 cable and execute terminal emulation program on PC. In this, Serial port configuration is set to 115200 baud, 8 bit per character, no parity and 1 stop bit. And If IRD is plugged in AC, "WAIT" appear and disappear on VFD and "DOWNLOAD" display and message box on TV or monitor as [Figure 1-1] appear. In this time, Message as [Figure 1-2] is dumped on PC termal.

Application software corrupted!!

Try power recycle and if this problem persists,

wait for a software download from the satellite,

or call your satellite receiver manufacturer

at 1-877-939-6484.

[Figure 1-1] On the TV or monitor

3-3

In PC terminal, Input “directv”and enter, and is displayed [Figure 1-3] in message box on TV or monitor. And Message as [Figure 1-4] is dumped on PC terminal.

***** application checksum error. [WARN!!]multiple fail – 103/0 -> 104/0 > SWDL Recovery Mode [CAS]stsid:1375731711 Periodic Task Started!! [CAS]Major Version of IRD:448 [CAS]SCN No.: 38d1d, 3311402 In ‘GetCwpAddress’. In ‘GetCapAddress’. CAM_Init CAM ID -> 0x1fde1032 In ‘SetAddress’. Verifier version:180e In ‘EnableCwpBuffer’. Buf# -> 3f Successful initial verifier !! In ‘EnableCwpBuffer’. Buf# -> 3f > tr = 32 ...

[Figure 1-2] On the terminal

Downloading a software upgrade, please wait...

DO NOT unplug your receiver.

Downloading via calibration port (115200-8-n-1)...

[Figure 1-3] On the TV or monitor

Ethernet board was not connected. Serial download command from application. Downloading a new software via calibration port. Send binary data [115200,n,8,1]…

[Figure 1-4] On the terminal

3-4

In this time, Transmit a compressed application image of new version with binary file transmition mode in terminal emulation and after downloading image file, write correctly and then, wait for rebooting application program.

[Figure 1-5] as below is message on terminal that IRD transmit new file, write in FLASH and then reboot.

xxxxxxx bytes received. Serial binary download completed. CRC check about downloaded image … O.K Expand the compressed image at 0x010d0000

Erasing FLASH sector #16 - #60 (wait a minute) … #60 FLASH memory was erased successfully.

Programing FLASH memory (wait a minute) … done Verifying FLASH memory with source data ... done FLASH memory was programmed successfully. !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!! from now, automatic REBOOTing the System !!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[Figure 1-5] On the terminal

3-5

ELECTRICAL TROUBLESHOOTING GUIDE

1. Power(SMPS) CIRCUIT

YES

YES YES

YES

(1) No 3.7VA

Check or Replace the D129.

(2) No 24VA

(3) No VFD

NO 3.7VA.

Is the F101 normal?

Is the TH01 normal?

Is the BD101 normal?

Is Vcc(14~22V) supplied to IC101 Pin3?

Are the D121/D122 normal?

Is there about 2.5V at the IC103 Pin1?

Is the D124 normal?

Is the D125 normal?

Replace the F101.

(Use the same Fuse)

Replace the BD101.

Replace the TH01.

Is the D102 normal?

Check or Replace the D102.

Replace the D121/D122.

Replace the D103.

Replace the D124.

Replace the D125.

Replace the D129.

NO VFD

Is the F102 Normal?

Is the D128 Normal?

YES

Is the ZD151 Normal?

YES

Check or Replace the D127.

Check or Replace the F102.

Check or Replace the D128.

Check or Replace the ZD151.

Is there about 26V at the IC151 Pin1?

Check or Replace the IC151.

Is the D129 normal?

Replace the D126.

Is the D126 normal?

NO 24VA.

YES

Power in Main PCB is short?

Replace the D127.

Is the D127 normal?

3-6

YES

(4) No 12VA

Is there about 26V at the IC153 pin1?

Is the IC153 Normal?

Is the ZD152 Normal?

YES

Check or Replace the IC152.

Check or Replace the D129.

Replace the IC153.

Replace the ZD152.

3-7

2. AUDIO CIRCUIT

1) NO ATSC AUDIO

YES

(1) Check IC400 and Surroundings

1.8V & 3.3V are supplied to IC400?

Data is input from TU300 to IC402 & 403(3, 6,10,13)?

Data is output from IC402 & 403 (4,7,9,12)?

Logic High is input to IC401& 402 & 403(1)?

Data is output from R424? Fig. 01

YES

3.072MHz clock is output from R422?

FIG. 02

YES

48kHz clock is output from R421?

Fig. 03

Check the Power Supply Part.

Check Tuner Part.

Check IC201(36).

Check IC402 & 403.

Check or Replace the D102.

3-8

Fig.01 Fig.02 Fig.03

3-9

Fig.04

YES

NOYES

YES

(2) Check MSP4448G and Surroundings

5V is supplied to IC701 (10, 16, 49, 63)?

8V is supplied to IC701(31)?

Data pulse is input to IC701(6)?

18.432MHz Clock is input to IC701 (54, 55)?

48kHz clock is input to IC701(4)?

YES

Analog audio is output from IC701 (28, 29)? Fig. 04

Check Power Supply Part

10V is supplied to IC805(1)?

Check Power Supply Part

Check X701

Check IC400

Check IC702 and surroundings

3-10

YES

(3) Check IC804 and Surroundings

9V is supplied to IC702(8)?

Analog audio signal is output from IC702(1, 7)?

Check Power Supply Part

Check IC702 and surroundings

(4) Check Output Jack and Surroundings

Check Q702, Q703, Q704, Q705, JA600 and their surroundings

3-11

2) NO DIRECTV AUDIO

YES

ATSC audio is OK?

IC401(1), IC402(1) and IC403(1) are Low?

Pulse is output from R805 and R806?

Go back to symptom #1

Check IC201(36).

Check IC800 and surroundings.

3-12

3) NO NTSC AUDIO

YES

ATSC & DIRECTV Audio are OK?

SIF signal is input to the Base of Q302?

SIF signal is input to IC701(50)?

Fig. 05

YES

Analog audio signal is output from IC701(17, 18)?

Go back to symptom #1 or 2

Check TU300

Check Q302

Check IC701 and surroundings.

Fig.05

3-13

4) NO SPDIF OUT FOR ATSC & DIRECTV

YES

ATSC & DIRECTV Audio are OK?

SPDIF pulse is output from R423?

Fig. 06

SPDIF pulse is output from IC704(4)?

YES

5V is supplied to JA701(2)?

YES

Check JA701 and surroundings.

Go back to symptom #1 or 2

Check IC400 and surroundings.

Check IC704 and surroundings.

Check Power Supply Part.

Fig.06

3-14

5) NO SPDIF FOR NTSC

YES

ATSC & DIRECTV Audio are OK?

ATSC & DIRECTV SPDIF are OK?

NTSC Audio is OK?

YES

Analog audio is output from IC701 (25, 26)?

YES

18.432MHz clock is output from IC701 (57)? Fig. 07

Data pulse is output from IC701(5)?

Go back to symptom #1 or 2

Go back to symptom #4

Go back to symptom #3

Check IC701.

Fig.07

18.432MHz clock output from IC701(57)

3-15

6) NO 3/ 4 RF AUDIO

YES

ATSC & DIRECTV Audio are OK?

ATSC & DIRECTV & NTSC SPDIF

are OK?

Analog audio is output from IC701(18)?

YES

Analog audio is output from the Emitter of Q701?

YES

Check TU360.

Go back to symptom #1 or 2

Go back to symptom #4 or 5

Check IC701.

3-16

3. DIRECTV Front- End CIRCUIT(QPSK)

YES

Start

Power is supplied normally?

IIC is operated normally? (SCL(TU360 (28)), SDL(TU360(27)) Pin -> HIGH)

YES

The signal of controlling Multi- Switch is operated normally? (using Oscilloscope and signal strength on Menu)

YES

Check the power line referring the circuit diagram.

Check the connection between tuner (TU360) and IIC line/ power/ peripheral parts.

Check the operation of LNBP20PD (IC360). Check the connection between LNBP20PD and power line/ peripheral parts.

(A)

The signal from satellite is detected? (using the split including DC block port and Spectrum Analyzer)

Tuner’s error flag(TU360(15)) is operated normally? (using Oscilloscope) High : Error, Low : normal

Check QPSK- signals(P360). DATA( Fig. 03 ) : pin 1,3,5,7,9,11,13,15 packet clock( Fig. 04 ) : pin 8 Byte clock( Fig. 05 ): pin 4

End

YES

Check the dish pointing.

Check the state of satellite signal.

Check the status of connection on PCB.

3-17

YES

(A)

Start

The IC960 power pins are 24V ? .

YES

IC360(6) is high?

YES

Check the power line referring the circuit diagram.

Check the connection on board.

On the signal strength of menu Select sat A, and odd transponder. IC360(4) is 13~ 14V?

On the signal strength of menu Select sat A, and even transponder. IC960(5) is 18~ 19V?

On the signal strength of menu Select

sat B, and even or odd transponder. The tone siganl acts properly in the IC360(4)? Fig. 01

End

YES

Check connection on the board, and check IC360(5)(LOW).

Check IC360(5) (HIGH).

Check TU360(12).

Fig. 02

3-18

FIG. 02 TU360(12)

FIG. 01 IC360(4) TONE signal

FIG. 05

P360(4) QPSK Byte Clock

FIG. 04

P360(8) QPSK Packet Clock

FIG. 03

P360(1, 3,5,7,9, 11,13,15) QPSK DATA

3-19

4. DVI CIRCUIT

YES

* : Please check that receiver supports this format.

START

DVI cable is connected?

DVI ICON is activated on front panel ?

YES

480P picture is OK?

YES

720P & 1080I picture are OK?

480I picture are OK?

END

Connect DVI cable.

YES

(A)

Display Format switch on rear panel is RGB/ DVI side ?

The emitter of Q500 is high volt ?

IC500(11) is high volt ?

END

Change the switch to RGB/ DVI side.

Use other DVI cable or turn on the monitor that is connected with DVI cable.

Change the DVI chip.

(A)

Check IC500(57(IDCK+), 2(DE), 4(HSYNC), 5(VSYNC)) The IDCK_ clock shall be 27MHz.

Fig. 01

* Check IC500(57(IDCK+), 2(DE),

4(HSYNC), 5(VSYNC))

The IDCK_ clock shall be 74.25MHz.

Fig. 02, Fig. 03 and Fig. 04

* Check IC500(57(IDCK+), 2(DE),

4(HSYNC), 5(VSYNC)) The IDCK_ clock shall be 13.5MHz.

Fig. 05, Fig. 06

3-20

FIG. 03

DVI output at 1080i even field

FIG. 02

DVI output at 720p

FIG. 01

DVI output at 480p

FIG. 06

DVI output at 480i even field

FIG. 05

DVI output at 480i even field

FIG. 04

DVI output at 1080i odd field

3-21

5. CPU(System Control) CIRCUIT

YES

START

Power is supplied normally?

Clock signals are OK?

Reset signals are OK at the time of power- on reset?

Chip selection signals are OK?

IIC channels are OK?

Interrupt signals are OK?

Messages are output through RS- 232C port on PC terminal?

END

YES

(A) Power check

(B) Clock check

(D) CS check

(E) IIC check

(F) Interrupt check

(G) RS- 232C check

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