Sharp TUDTV100, TU-DTV1000-A Service Manual

TU-DTV1000/A

SERVICE MANUAL

S08Y6TU-DTV10

ATSC DIGITAL TELEVISION SYSTEM

DTV DECODER

MODEL

In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.

CONTENTS

Page Page

• SPECIFICATIONS.............................................. 2

• IMPORTANT SERVICE SAFETY NOTES..........3

• NOTE TO SERVICE PERSONNEL....................4

• OPERATION MANUAL ...................................... 5

• REMOVING OF MAJOR PARTS........................8

• TROUBLE SHOOTING TABLE ........................ 13

• SERVICE ADJUSTMENT................................. 17

• CHASSIS LAYOUT .......................................... 23

• BLOCK DIAGRAM ...........................................25

• OVERALL WIRING DIAGRAM.........................27

TU-DTV1000/A

• DESCRIPTION OF SCHEMATIC DIAGRAM ...29

• SCHEMATIC DIAGRAM................................... 30

• PRINTED WIRING BOARD ASSEMBLIES...... 83

• PARTS LIST

Ë ELECTRICAL PARTS................................. 93

Ë CABINET AND MECHANICAL PARTS..... 111

Ë ACCESSORIES PARTS ........................... 113

Ë PACKING PARTS ..................................... 113

• PACKING OF THE SET ................................. 114

SHARP CORPORATION

This document has been published to be used for after sales service only. The contents are subject to change without notice.

TU-DTV1000/A

Specifications

Product Type DTV Decoder Model TU-DTV1000 Video System ATSC Digital television system Receiving Frequency VHF : Low 54~88MHz, High 174~216MHz

UHF : 470~806MHz Antenna Input 75Ω unbalanced Video Output Signal

1080i(HDTV)

» 5BNC Output R.G.B : 1.0Vp-p (Trilevel Sync On), 75Ω

HD, VD : 0.3Vp-p (Sync Negative), 75Ω

» Component Output Y : 1.0Vp-p (Trilevel Sync On), 75Ω

PB/PR : ±0.35Vp-p (Trilevel Sync), 75Ω

480p(VGA)

» 15-pin mini D-sub R.G.B : 0.7Vp-p (Non-sync), 75Ω

HD, VD : TTL level (Negative)

480i

» Component Output Y : 1.0Vp-p (Negative Sync On), 75Ω

PB/PR : ±0.35Vp-p (Non-sync), 75Ω

» S-video Output Y : 1.0Vp-p (Negative Sync On), 75Ω

C : burst 0.286Vp-p, 75Ω

» Video Output Composite video 1Vp-p (Negative Sync on), 75Ω

Audio Output Signal

» Output Signal Output level : 2Vrms(1kHz, 0dB) » 5.1ch Output Front L/R, surround L/R, center and subwoofer

Output connector : Pin-jack

» Digital Audio I/F Optical digital output : Optical connector » Coaxial Digital Output Pin-jack

Rated Voltage AC 120V Rated Frequency 60Hz Power Consumption 57W Operating Temperature 0°C to 40°C (32°F to 104°F) Storage Temperatue -20°C to 55°C (-4°F to 131°F) Cabinet Front : Plastic

Top, Bottom : Metal Dimensions Material 16.9" × 11.0" × 3.1" (430 × 280 × 79.5 mm)

(W × D × H) (Main body only) Weight 10.4lbs (4.7kg) Supplied Accessories Remote control unit

Two AA batteries

(For Expansion Port) Up grade port

Digital expansion port (Preparation for Future)

Specifications are subject to change without notice.

TU-DTV1000/A

IMPORTANT SERVICE SAFETY NOTES

Ë Service work should be performed only by qualified service technicians who are

thoroughly familiar with all safety checks and servicing guidelines as follows:

WARNING

1. For continued safety, no modification of any circuit should be attempted.

2. Disconnect AC power before servicing.

BEFORE RETURNING THE DTV DECODER: (Fire & Shock Hazard)

Before returning the projector to the user, perform the following safety checks:

1. Inspect lead wires are not pinched between the chassis and other metal parts of the DTV decoder.

2. Inspect all protective devices such as non-metallic control knobs, insulating materials, cabinet backs, adjustment and compartment covers or shields, isolation resistor-capacity networks, mechanical insulators, etc.

3. To be sure that no shock hazard exists, check for current leakage in the following manner:

» Plug the AC cord directly into a 120-volt AC outlet,

(Do not use an isolation transformer for this test).

» Using two clip leads, connect a 1.5k ohm, 10 watt

resistor paralleled by a 0.15µF capacitor in parallel between all exposed metal cabinet parts and earth ground.

» Use an AC voltmeter with sensitivity of 5000 ohm per

volt., or higher, sensitivity to measure the AC voltage drop across the resistor (See Diagram).

» All checks must be repeated with the AC plug

connection reversed. (If necessary, a non-polarized adapter plug must be used only for the purpose of completing these checks.) Any reading of 0.37 volts RMS (this corresponds to

0.25 milliamp. AC.) or more is excessive and indicates a potential shock hazard which must be corrected before returning the unit to the owner.

VOLTMETER

1.5k ohm (10W)

0.15µF

TEST PROBE

TO EXPOSED METAL PARTS

CONNECT TO KNOWN EARTH GROUND

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

SAFETY NOTICE

Many electrical and mechanical parts in DTV decoder have special safety-related characteristics. These characteristics are often not evident from visual inspection, nor can protection afforded by them be necessarily increased by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in this manual; electrical components having such features are identified by “å” and shaded areas in the Replacement Parts Lists and Schematic Diagrams. For continued protection, replacement parts must be identical to those used in the original circuit. The use of a substitute replacement parts which do not have the same safety characteristics as the factory recommended replacement parts shown in this service manual, may create shock, fire or other hazards.

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

TU-DTV1000/A

WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS UNIT TO

MOISTURE OR WET LOCATIONS.

CAUTION

RISK OF ELECTRIC SHOCK. DO NOT REMOVE SCREWS

EXCEPT SPECIFIED USER

SERVICE SCREW

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,

CAUTION

(ATV-1 & ATV-2)

1A 60V

CAUTION

(Main Power)

3A 250V

DO NOT REMOVE COVER (or BACK).

NO USER-SERVICEABLE P ARTS INSIDE.

REFER SERVICING TO QUALIFIED SERVICE

PERSONNEL.

CAUTION

For continued protection against a risk of fire, replace only with same type 1A 60V fuse. (F5101 ··· ATV-1) (F5401 ··· ATV-2)

(ATV-1 & ATV-2)

1.6A 60V

CAUTION

For continued protection against a risk of fire, replace only with same type 3A 250V fuse. (F1)

(Sub Power)

4A 125V

For continued protection against a risk of fire, replace only with same type 1.6A 60V fuse. (F5102, F5103, F5104, F5105 ··· ATV-1) (F5402 ··· ATV-2)

For continued protection against a risk of fire, replace only with same type 4A 125V fuse. (F5981)

The lighting flash with arrowhead within a triangle is intended to tell the user that parts inside the product are risk of electric shock to persons.

The exclamation point within a triangle is intended to tell the user that important operating and servicing instructions are in the manual with the projector.

CAUTION

(ATV-2)

2A 60V

For continued protection against a risk of fire, replace only with same type 2A 60V fuse. (F5403, F5404, F5405)

CONTROL OPERATION QUICK REFERENCE

TU-DTV1000/A

REAR TERMINALS

BASIC OPERATION

TU-DTV1000/A

REMOVING OF MAJOR PARTS

1. Removing the top cabinet

1-1. Remove the four lock screws off the right and left sides of the top cabinet. 1-2. Remove the five lock screws off the back of the top cabinet. Slide the top cabinet toward yourself and detach

it.

1-1

Top Cabinet

1-2

TU-DTV1000/A

2. Removing the front cabinet and PWBs

2-1. Remove the three lock screws off the front cabinet. Undo the three hooks at the bottom and detach the front

cabinet. 2-2. Remove the three lock screws and take out the Operation unit PWB. 2-3. Remove the five lock screws and take out the R/C·LED unit PWB.

2-1

Operation Unit

2-2

Front Cabinet

R/C·LED Unit

2-3

TU-DTV1000/A

3-1

3. Removing the ATV-1 and ATV-2 unit PWBs

3-1. Remove the nine lock screws off the terminals on the back.

3-2. Disconnect the connectors of the ATV-1 and ATV-2 unit PWBs. 3-3. Remove the eight lock screws off the ATV -1 unit PWB. Disconnect the terminals from the bottom cabinet. Lift

and detach the ATV-1 unit PWB.

3-4. Remove the eight spacers (stud bolts). Disconnect the terminals from the bottom cabinet. Lift and detach the

ATV-2 unit PWB.

3-3

ATV-1 Unit

3-4

8 pcs.

Bottom Cabinet

3-2

ATV-2 Unit

4. Removing the Main power and Sub-power unit PWBs

4-1. Remove the two lock screws off the Sub-power unit PWB bracket. 4-2. Remove the five lock screws off the Sub-power unit PWB.

Detach the sub-power unit PWB from its bracket. 4-3. Remove the three lock screws off the Main power unit PWB. Take out the power unit PWB.

4-2

TU-DTV1000/A

4-3

Main Power Unit

4-1

Sub Power Unit

4-3

TU-DTV1000/A

Layout of servicing the PWBs

DUNTK9713DE01

P5771

P5401

DUNTK9710DE01

(Wiring Side)

SC5411

P5214 P5213

SC5013 SC5103

SC5409

P5411

P5412

1 QCNW-5142CEZZ 2 QCNW-5143CEZZ 3 QCNW-5144CEZZ 4 QCNW-5145CEZZ 5 QCNW-5146CEZZ 6 QCNW-5147CEZZ 7 QCNW-5148CEZZ

DUNTK9712DE02

P5772

P5982

CN1

P5216

DUNTK9709DE01

(Chip Parts Side)

P5981

P5983

DUNTK9711DE01

P5986

P5985

P5984

RDENC0282CEZZ

CN2

TROUBLE SHOOTING TABLE

No power (Unit’s power LED failure to light up)

» Make sure the AC cord is plugged in.

Is the unit switched on using the unit’s power switch or the R/C unit?

(No power with the unit’s power switch)

(No power with both the controls)

TU-DTV1000/A

(No power with the R/C unit)

Front panel PWB defective: Check power switch or connection cable.

Check to see if the R/C unit and the front panel are on power. Is there +5V signal at pin (1) of P215 on the ATV-1 PWB?

YES

Check the microprocessor circuit (IC5201 and its peripheral circuits).

)

Power LED flashing

» The LED starts flashing if the fan at the back is interrupted

or if the ATV-1’s SH3 (IC5101) gets in trouble.

YES

Is the fan at a stop (power LED and timer LED alternately flashing)?

Replace the R/C unit. But the same troubleremains.

Front panel PWB defective: Check RMC5771 or connection cable.

Check the sub-power PWB.

No: Power LED only flashing

Check the fan.

Check the ATV-1 PWB’s SH3 (IC5101) for malfunction. Are the power voltages (+12V, +5V and +3.3V) supplied to the ATV-1 and ATV-2 PWBs? (ATV-1: +12V at pin (1), +5V at pin (3), +3.3V at pin (5), all of P5202; 3.3V at pins (1) and (2) of P5201) (ATV-2: +12V at pin (1), +5V at pin (3), +3.3V at pins (5) and (6), all of P5412; 3.3V at pins (1) and (2) of P5411)

YES

Check IC5101 (SH3) or IC5105 (FPGA).

Check the power unit and AC cord.

TU-DTV1000/A

TROUBLE SHOOTING TABLE (Continued)

First make sure of the following points.

» The AC power cable is plugged in. » The power is switched on and the unit’s power LED stays on. » The output mode switch is properly set according to a monitor

to be connected.

→Refer to “VIDEO CONNECTIONS” (pages. 32 and 33) of

the Operation Manual.

» The video and audio cables are correctly connected.

Make sure of the following points: selected

channel number displayed on screen, antenna

cable properly connected, reception condition

by HDTV indicator on front panel.

Is the HDTV indicator either on or off (not

flashing)?

No video output, no audio output

Can a channel be selected (channel number displayed on screen)?

YES

Check the D5212 and D5213 on the ATV-1 PWB. Green LED on, red LED flashing: This means the IC5101 (SH3) functions. Check the following parts. » ATV-1 and ATV-2 connection cables (SC5103) » ATV-1 FPGA (IC5105) » ATV-2 MMC (IC5424 and IC5429) Green LED off, red LED on or off: This means the SH3 or other part malfunctions. Check the following parts. » SH3 (IC5429), FPGA (IC5105), SDRAM (IC5102 and IC5104), ROM (IC5111 and

IC5112), Flash (IC5113 thru IC5116)

YES

1) Slow flashing There is no DTV program available for a selected major channel, or if any, the signal reception condition is too bad to receive clearly. → Select another channel with DTV signal and try again.

2) Quick flashing There is a DTV program available for a selected major channel, but the signal reception condition is too bad to receive clearly.

→ Select another channel with DTV signal and try again.

3) Intermittent flashing There is a DTV signal for a selected major channel and the signal is well received, but minor channels are not properly set (example: 02 of 23.02) (There is no program for a selected minor channel.) → Set another minor channel or select another major channel.

If another channel is tried but the indicator is still flashing, check the tuner (TU5001) and the VSB (UNT5001).

Select a channel without DTV program.

Is the HDTV indicator flashing?

YES

Select a channel with DTV program again. (Make sure the indicator stays on or goes out.)

ATV-1 ST20TP2 (IC5001) malfunctioning Turn off the power and turn it on again. If the ST20TP2 still malfunctions, check the ST20TP2 (IC5001) and RAM(IC5009 and IC5010) for trouble.

Check the LEDs (D5023, D5024 and D5025) on the ATV-1 PWB. Does the D5023 light up in green?

YES

A DTV signal (available in the selected channel) is locked.

There is no DTV signal for the selected channel. Check the tuner and VSB unit for trouble.

Does the D5024 light up in green and the D5025 (red) go out?

The tuner and VSB function well. Check IC5001 and IC5003 for trouble.

If D5025 starts flashing or stays on in red, it means the reception condition is bad with many errors.

` Because of poor reception condition, DTV programs may be affected by the VSB out of lock (D5023 off) or reception error

(D5025 on or flashing). Possible causes include:

» that signals being received by the antenna are too weak or too strong. » that received signals contain remarkable ghost and other interference.

» Make sure the video cable is

properly connected.

» Make sure the video output

mode corresponds to a monitor being hooked up.

No video output (audio output available)

Does the on-screen display function well (by using the R/C unit)?

Check the D5212 and D5213 on the ATV-1 PWB. Green LED on, red LED flashing: This means the SH3 (IC5101) functions. Check the following parts.

» ATV-1 and ATV-2 connection cables (SC5103) » ATV-1 FPGA (IC5105) » ATV-2 MMC (IC5424 and IC5429)

Green LED off, red LED on or off: This means the SH3 or other part malfunctions. Check the following parts.

» SH3 (IC5429), FPGA (IC5105), SDRAM (IC5102 and

IC5104), ROM (IC5111 and IC5112), Flash (IC5113 thru IC5116)

See if the ATV-1 and ATV-2 connection cables (ATV-1 connector SC5411) are connected tightly. Check the ATV-2 video decoder (IC5403), SDRAM (IC5405, IC5406 and IC5407), FPGA (IC5408) and SDRAM (IC5412 thru IC5415) for trouble.

YES

TU-DTV1000/A

TROUBLE SHOOTING TABLE (Continued)

TU-DTV1000/A

Errors in NTSC record output only.

TROUBLE SHOOTING TABLE (Continued)

Images in a certain input format or from a certain output terminal are poor.

Errors in main NTSC system output only (no problem with HDTV system output) Check the ATV-2 NTSC encoder (IC5440).

Errors in main HDTV and 480P system output only.

Errors in 480I format input only.

Check the ATV-2 MMC (IC5444) and NTSC encoder (IC5447).

` Also take the following steps.

»Check to see if the monitor

cable is properly connected.

»Check the record output cable

that runs from the ATV-2 to the ATV-1 (ATV-1 connector P5311).

»Check the video terminals on

the back.

» Make sure the audio cable is

properly connected.

» Make sure the audio terminals

are not defective.

No analog audio output. No digital audio output.

Check the ATV-2 NTSC encoder (IC5440).

»Check to see if the output

mode is properly set.

»Check to see if the monitor

cable is properly connected.

»Check the NTSC system

output cable that runs from the ATV-2 to the ATV-1(ATV-1 connector P5216).

»Check the video terminals on

the back.

Check the ATV-2 FPGA (IC5434), DAC (IC5439) and FL5407.

»Check to see if the output mode

is properly set.

»Check to see if the monitor

cable is properly connected.

»Check the video terminals on

the back.

Unusual audio output (video output available)

Check the ATV-2 SVP (IC5411 or IC5420), FPGA (IC5466) and SDRAM (IC5404 thru IC5407).

Is digital audio output okay (amplifier of AC-3 decoder to be connected)?

YES

Are there both 2ch L/R and 5.1ch outputs?

(No output at all)

Check the ATV-1 DA (IC5305, IC5306 and IC5307).

Note: When a broadcast signal is any other than 5.1ch (2ch, for

example), the 5.1ch analog output is given only for the channel in question, but not for all the other channels. The same signal is given for the 2ch L/R audio and record 2ch L/R audio outputs.

Check the ATV-1 (IC5311 and IC5312).

(No 2ch output)

Check the audio decoder (IC5301).

Check the ATV-1 (IC5313, IC5314 and IC5315).

Is analog audio output okay?

NO NO

Check IC5303 (photo-output) and IC5310 (coaxial).

(No 5.1ch output)

Note: For playing back the digital audio on the

YES

Check the audio decoder (IC5301).

Dolby AC-3, the audio amplifier of the Dolby AC-3 decoder must be externally connected and the AC-3 mode must be set.

TU-DTV1000/A

SERVICE ADJUSTMENT

Precaution:

When the set has been disassembled and repaired, be sure to place all the copper tapes and filters back into position to keep against unintended radiation.

Ë Serviceman mode

This model is equipped with the serviceman mode for a repairman to get the information that is effective in servicing the set in the field. The serviceman mode consists of two modes: service mode to show the reception condition of tuner and VSB system, and check mode to indicate the automatic-check results.

1. Calling the serviceman mode

1) Hold down the yellow color key located at the right of the set, and press the power key at the left to turn on the power. The serviceman mode gets started and the following shows up on the screen.

Seviceman Mode

Service : push blue key Check : push red key

2) The service mode comes on by pressing the blue color key on the set or on the remote controller: the check mode by pushing the red color key.

2. Quitting the serviceman mode

Just turn off the power. When the power is turned on again, the set is switched on in the normal mode.

TU-DTV1000/A

Ë Service mode

DTV stands for digital television broadcast. In analog broadcast, the worse the reception condition gets, the more noises and ghosts occur on the screen. In digital broadcast, on the other hand, there is no degraded images up to a certain level. Once the reception condition drops below a limit, however, both picture and sound are interrupted suddenly. W ith DTV sets, it is thus very difficult to know how well the radio wave is received by viewing the screen. To cope with this problem, the service mode provides for useful information on signal reception condition on the screen.

1) Service mode screen and switching There are two screens for the service mode. Press the SELECT key on the set or the R/C unit, and at each push the two screens get switched alternately.

2) Limitations with the service mode In the service mode, channels can be selected just directly or with the CH UP/DOWN keys. Any other ways channel selection are impossible. The usual on-screen display does not appear either.

3) Information displayed in the service mode SERVICE MODE 1 screen

SERVICE MODE 1 V1.01 STATUS1 : TUNER/VSB CH : **.** VSB : LOCK/UNLOCK NTSCIRF : ON/OFF/··· VSB MODE : 8VSB/··· SI GET : OK/NG PACKET ERROR :

SERVICE MODE 1 :

Tells that the set is in the service mode 1.

V1.01 :

Indicates the version of the software installed in the set. Make sure the program version is up to date.

CH:**.** :

Indicates the channel that is being selected.

VSB Lock :

Shows if the VSB system is locked or unlocked. OK : Indicates that a selected major channel has DTV programs.

NG : Indicates that a selected major channel does not have any DTV programs. * When the VSB is unlocked, “...” is shown for the following two items. NTRCIRF :

Shows whether the NTSC rejection filter is activated or not. VSB Mode :

Indicates that 8VSB signals are being received. SI GET :

Indicates that SI information is being received.

No video and audio output is possible even in the locked state, if the set is not ready to receive the SI

information.

PACKET ERROR :

Indicates the current reception condition by displaying, in bars and figures, the number of errors of the data received for a certain period of time. This helps estimate the antenna condition, signal level and other data. Let’s say that the levels with increasing blocks from left are named a), b),... e). a) Good condition with no error → Picture and sound are not affected at all.

b) One to 10 errors for 20 seconds → There are some errors, but picture and sound are seldom affected.

c) Eleven to 30 errors for 20 seconds → Picture and sound may be noticeably affected by errors.

(Image freezes, block noises, interrupted sound)

d) Thirty-one to 100 errors for 20 seconds → Picture and sound are remarkably affected by errors. Image freezes

or interrupted sound may occur.

e) More than 100 errors → Picture and sound cannot be outputted.

TU-DTV1000/A

The figures shown below the bars indicate the numbers of packet errors for 20 seconds.

» This model cannot receive video and audio signals clearly if the following conditions are met:

VSB: LOCK, VSB MODE: 8VSB, SI GET: OK, PACKET ERROR level at a) or b).

SERVICE MODE 2 screen

SERVICE MODE 2 V1.01 STATUS2 : VIDEO/AUDIO CH : **.** SI/PSIP : SI/PSIP/NO STREAM FORMAT : 1920×1080 60I 16:9/NO STREAM V-DECODER : WORKING/NO STREAM A-DECODER : WORKING/NO STREAM

SERVICE MODE 2:

Tells that the set is in the service mode 2.

V1.01 and CH:**.**:

The same as with the service mode 1.

SI/PSIP:

Shows which the set is receiving, SI or PSIP. (NO STREAM is indicated when unlocked.)

FORMAT:

Indicates the numbers of horizontal and vertical pixels, frame frequency, interlace/progressive and aspect ratio of the video format now being received.

V-DECODER & A-DECODER:

Shows if the decoders are working correctly.

TU-DTV1000/A

Ë Check mode

In this mode, the basic performance of the hardware that is connected with the main microprocessor (SH3) is checked up. The check results are displayed on the screen.

1) Check mode screen and switching There are three screens for the check mode. Press the SELECT key on the set or the R/C unit, and at each push the three screens get switched one after the other.

2) Limitations with the check mode In the check mode, the DTV’s basic operation cannot be performed. Check-related control only is possible.

3) Information displayed in the check mode

CHECK MODE 1 screen

CHECK MODE 1 (SH3)

R/C : OK (or NG) ROM : XXXX FLASH : OK (or NG) MMC : OK (or NG) ST20 : OK (or NG)

CHECK MODE 1 (SH3):

Tells that the set is in the check mode 1. Commands from the SH3 main microprocessor are checked.

R/C:

Shows how well communication is with the R/C unit’s microprocessor. OK: Indicates that the SH3 communicates well with the R/C unit’s microprocessor. NG: Indicates that the SH3 fails to communicate with the R/C unit’s microprocessor.

ROM : XXXX :

Sum-checks the ROM. The ROM’s sum-check results are displayed via the SH3.

FLASH :

Indicates the condition of the flash. OK : Indicates that the flash is read correctly. NG: Indicates that the fixed values on the flash are not correctly read.

MMC:

Checks the MMC’s boot-up. This check goes from the MMC1 to the MMC3. OK: Indicates that the MMC gets booted correctly. NG: Indicates that the MMC fails to get booted.

ST20:

Checks the ST20’s boot-up. OK: Indicates that the ST20 gets booted correctly. NG: Indicates that the ST20 fails to get booted.

CHECK MODE 2 screen

CHECK MODE 2 (ST20):

Tells that the set is in the check mode 2. Commands from the ST20 TS decoder are checked.

DPRAM:

Checks the DPRAM’s read/write performance via the ST20. OK: Indicates that the DPRAM can read and write properly. NG: Indicates that the DPRAM fails to read and write.

TUNER

Checks the tuner’s write performance via the ST20. OK: Indicates that the tuner can write properly. NG: Indicates that the tuner fails to write.

VSB:

Checks the VSB system’s read/write performance via the ST20. OK: Indicates that the system can read and write properly. NG: Indicates that the system fails to read and write.

Video:

Checks the video decoder’s read/write performance via the ST20. OK: Indicates that the video decoder can read and write properly. NG: Indicates that the video decoder fails to read and write.

Audio:

Checks the audio decoder’s read/write performance via the ST20. OK: Indicates that the audio decoder can read and write properly. NG: Indicates that the audio decoder fails to read and write.

SVP:

Checks the SVP’s read/write performance via theST20. OK: Indicates that the SVP can read and write properly. NG: Indicates that the SVP fails to read and write.

TU-DTV1000/A

CHECK MODE 2 (ST20)

DPRAM: OK (or NG) Tuner : OK (or NG) VSB : OK (or NG) Video : OK (or NG) Audio : OK (or NG) SVP : OK (or NG)

TU-DTV1000/A

CHECK MODE 3 screen

CHECK MODE 3 (push key):

Tells that the set is in the check mode 3. Press the keys on the front of the set to check the functions of the switches.

Keys:

Operate each of the keys on the set and see how its key name on the screen changes. OK: Indicates that the key on the set functions well. Key name remaining: Indicates that the key malfunctions.

CHECK MODE 3 (push key)

CLEAR UP MENU BLUE GREEN LEFT RIGHT RED BLACK DOWN SELECT

» To go from this screen to the next one (CHECK MODE1), press the SELECT key three times.

Ë Download procedure

1. Connect the PC-DTV with the printer cable.

2. Get the PC started.

3. Start the PC’s download program.

4. Plug in the DTV power cable and turn on the power.

5. Downloading starts itself. The red LED lights up. The blue LED starts flashing. A message appears on the PC screen.

6. Downloading ends itself. Correct downloading:

The red LED goes out. The blue LED lights up.

Wrong downloading:

The red LED starts flashing. The blue LED goes out. A message appears on the PC screen.

7. The PC’s program ends itself.

8. Turn off the DTV power. (Unplug the AC cord.)

(If an error happens, repeat the above steps from 3.)

9. End.

CHASSIS LAYOUT

TU-DTV1000/A TU-DTV1000/A

Sub Power Unit

Main Power Unit

Operation Unit

R/C/LED Unit

ATV-1 Unit

ATV-2 Unit

23 24

121110987654321

BLOCK DIAGRAM

TU-DTV1000/A TU-DTV1000/A

Data

MMC-1

Distributor

Bug-fix (25Pin D-sub)

~Flash Memory Write System

SH3

Interface

SH3

Raster

Scan

Converter

IP-

Converter

MMC-2

P/S

D/A

CPU

TS Data IN

MPEG2

Video

NTSC

Encoder

Decoder

~Imitation Signal System

Interface

MMC-3

NTSC

Encoder

VGA (15Pin D-sub)

HD component output (Add R-Pro only)

Y/PB/PR (NTSC)

S-Video Video

Rec Video Composite &

Audio output

Rf-IN

VSB

TUNER

VSB

Decoder

Link

Interface

Decoder

(Add R-Pro only)

Rec Audio LR

DPRAM

Controller

Remote Control

P5212 I2C Bus control (Add R-Pro only)

Operation SW Mode-SW

Video SW

RGB-SW

R/C

Micon

0 ohm Resister(R-Pro only) (STB is open)

AC3

Decoder

6ch D/A

Coaxial

Driver

DOWN

MIX

Optical

Interface

Audio

Optical

Coaxial

2C Bus I/O Check System

Control(R/C)

TS Data OUT

~ →Be considering subject

121110987654321

25 26

+ 54 hidden pages