Philips L05HD Guide d'installation

PHILIPS TECHNICAL TRAINING

L05HD TRAINING MANUAL

PHILIPS CONSUMER ELECTRONICS

64 PERIMETER CENTER EAST

PO BOX 467300

ATLANTA, GA 31146-7300

MM032205

TABLE OF CONTENTS

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

AUXILIARY POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

MAIN POWER SUPPLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

DEFLECTION SYNC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

TV SIGNAL PROCESSOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

DEFLECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

VIDEO SIGNAL FLOW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

CRT DRIVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18

AUDIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

SIDE JACK PANEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

TROUBLESHOOTING TO PANEL LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Introduction

The L05HD TV chassis is designed for the model year 2005. This set is High Definition ready

with an NTSC tuning system. To receive the ATSC channels a set top box is required.

This design is used in large screen sizes of 27 and 30 inch with the 27-inch having a 4:3

aspect ration and the 30 inch version having a 16:9 aspect ratio. There are three types of

CRTs used which are the 100 degrees, 110 degrees, and wide screen version.

The standard architecture consists of a Main panel (called the family board), a Picture Tube

panel, a Side I/O panel, a HDMI panel, a HD panel, and a Top Control panel. The panels

consists primarily of conventional components with some surface mounted devices.

The functions for 1fH video and audio processing is performed in one IC (TDA1200xx, IC

7200), the Hercules chip. This chip is located on the solder side of the main panel.

The functions for the HD signals and 1fH to 2fH conversion is performed on the HD panel.

Except for switching, OSD, Closed Caption, Text, and A/D conversion, the bulk of the pro-

cessing is performed by the Trident chip, IC 7201.

The L05HD chassis has two signal processing sections, one for the 1fH (NTSC), and one for

2fH (HD) processing. Whatever signal is applied to the set, it is displayed on the CRT in a

1080i format.

The NTSC tuning system features 181 channels with on-screen display. The main tuning

system uses a tuner, a microcomputer, and a memory IC mounted on the main panel. The

microcomputer communicates with the memory IC, Remote Receiver, Tuner, Signal process-

ing IC, and HD processing section. The Memory IC retains the settings for favorite stations,

customer-preferred settings, and circuit settings. The circuit settings can be accessed by the

service technician via the Service Alignment mode.

The On-screen graphics and Closed Caption decoding are done within IC 7206 located on

the HD panel. They are added to the main signal in the Display Processor, 7221, located on

the HD panel.

Customer Operation

The L05 customer menu is similar to the L04 customer menu. The L05HD does not have

Picture-in-Picture.

Press the Menu button to make a selection. Press the Cursor up-down buttons on the

remote to highlight the desired selection. Press the right Cursor button to make the selection.

Page1

Press the Menu button on the remote and press the Cursor up-down button to obtain the

following screens.

Page 2

VOL

Main

Picture

Sound

Features

Install

Timer

Rotation

AutoLock

Active Control

Digi. Pic. Demo

Features Timer

StartTime

StopTime

Channel

Activate

Display

Access Code

- - - -

AutoLock

Block Channel

Setup Code

ClearAll

BlockAll

Movie Rating

TV Rating

Of fStop T ime

Channel

Activate

Display

Access Code

XXXX

Incorrect

New Code

- - - -

Confirm Code

XXXX

Timer

Rotation

AutoLock

Active Control

Digi. Pic. Demo

Access Code

XXXX

Features

T imer

Rotation

AutoLock

Active Control

Digi. Pic. Demo

Features

T imer

Rotation

AutoLock

Active Control

Digi. Pic. Demo

Features

T imer

Rotation

AutoLock

Active Control

Digi. Pic. Demo

Features

T imer

Rotation

AutoLock

Active Control

Digi. Pic. Demo

Features

Timer

Rotation

AutoLock

Active Control

Digi. Pic. Demo

Setting up the access code.

1. Press the Menu button on the remote

to display the on-screen menu.

2. Press the Cursor up or down buttons

until the word features are highlighted.

3. Press the Cursor right button to display

the features menu options.

4. Press the Cursor up or down buttons

until the words autolock are highlighted.

5. Press the Cursor right button. The

screen will read, “Access Code ----”

6. Using the number buttons, enter 0, 7,

1, 1. XXXX will appear as you press

the buttons.

Incorrect code will appear on the screen.

Enter 0711 again.

7. The screen will ask you to enter a new

code. Enter any 4 digit code.

Page 3

Power Supply Block (Figure 1)

The Power supplies are both located on the Family board. The supplies are divided into two

sections, the Auxiliary and Main section. A single filter and rectifier circuit supplies both

sections. The Auxiliary supply operates in a low power mode when the load is reduced. In

the standby mode, the 3.3 and 6 volt supplies are operating. The 3.3 volt supply provides

power to the processor section of the Hercules. The 6 volt supply provides power to the IR

receiver. The Main supply is switched Off via the Standby line.

When the set is turned On, the "B" line from the Hercules processor goes High switching

7547 which turns 7535, 7509, and 7545 On. The +3V3A, +6VA, +12VA, and +8VA supplies

are then switched On. The load placed on the Aux Power supply will cause it to switch to the

full power mode. At the same time, the STBY line switches Low turning the Main SMPS

supply On. The supply produces a +6 volt, +140 volt, -16 volt, and +16 volt supplies.

The +Vaudio (+16 volt) supply switches on the degauss relay.

FIGURE 1 - POWER SUPPLY BLOCK

Page 4

Auxiliary Power Supply (Figure 2)

IC 7510 is the heart of the Auxiliary Power supply. In the Standby mode, VIA the current

sensing and Control circuits, a low power condition is detected by the IC. The IC then goes

into a Burst Mode operation to reduce the power used by the circuit. In the Burst Mode, the

supply will operate at approximately 25 kHz. In full power operation the frequency will be

approximately 66 kHz.

When power is first applied to the set, Start up is supplied to the IC by the internal Start-Up

current through Pin 14. Startup voltage is also applied to the IC to Pin 2 by the AC_IN line

which is tied to the neutral side of the AC line. During normal operation, power is supplied to

the IC by the HOT windings, Pins 1 and 2, of transformer 5504. Output drive from Pin 11 is

applied to the Gate of Transistor 7525. Voltage developed across the current sensing resis-

tors in the Source of 7525 provides current sense information to the IC. When 7525 is

switched Off, the voltage on Pin 1 of 5504 goes High. This winding supplies the operating

voltage the power supply circuit. It also turns Transistor 7567 On causing the Gate of 7525 to

stay Low as long as Pin 1 of 5504 is High. This prevents 7525 from turning On until the field

of 5504 has collapsed.

Regulation is accomplished by monitoring the +3 volt supply. This voltage is fed to Shunt

regulator 7542 which controls the current through opto-isolator 7516. Shunt Regulator 7542

begins conducting when Pin 3 of the IC reaches 2.5 volts. At this point current flows through

the opto-isolator, 7516. The transistor inside 7516 turns On applying a control voltage to Pin

6 of 7510. If a problem should develop in the feedback circuit causing an excessive voltage

on Pin 6, Transistor 7549-2 will turn On, switching Transistor 7532 On. This will a voltage to

the Demag circuit on Pin 7 causing the IC to latch Off. The IC will stay latched until power is

removed and reapplied to the set.

In the Standby mode, the "B" control line from the Hercules Processor is Low. Only the +3,

+3V3, and +6 volt supplies are present. When the set is turned On, the "B" line will go High,

turning Transistors 7509, 7545, and 7535 On. This will switch On the +8VA, +12VA, +8V,

+3V3A, +6VA, and +5V supplies.

In normal operation, voltage from Pin 12 of 5504 is rectified by 6540 to produce a negative

voltage which prevents Transistor 7561 from turning On. If AC is removed from the set, this

negative voltage will disappear. The voltage across the filter capacitors on the +3V line will

turn 7561 On. The Power Down line will then go Low signaling the processor to shut the set

down.

Page 5

COM

OUTIN

REF

COM

OUTIN

Vcc

Gnd

Ctrl

START-UP

CURRENT SOURCE

VALLEY

START-UP

CURRENT SOURCE

CURRENT

SENSING

OUTPUT

DRIVER

OVER

POWER

LOGIC

CONTROL

CIRCUIT

MAXIMUM

ON-TIME

PROTECTION

VOLTAGE

CONTRLLED

OSCILLATOR

OVER

TEMPERATURE

PROTECTIOM

POWER-ON

RESET

SUPPLY

MANAGEMENT

FREQUENCY

PROTECTION

CONTROL

INPUT

CONTROL

CIRCUIT

BURST

DETECTOR

Drain

HVS

Sense

Demag

Driver

300K

20V

470U

I564

0086

HEATSINK

15V8

15V9

10V

1M5

470U

6548

2522

470p

3599

To 1405

Deflection

Controller

1V3

5V7

TEA1507

---

JMP

3V4

158V

C4V5

3V4

REGION

3540 27VRF-HD

---

JMP

AUXILIARY POWER SUPPLY

1V5

0V1

3V4

3m3

0V7

158V

3V7

Microcontroller

2V5

4m7

15V8

0V6

8V1

330K

15V8

To 1533 Of

Source Select +

3V2

0V7

10V7

0V6

6V3

9530

9534

NAFTA

30WSRF-HD

---

SIZE

3548

3551

3566

4523

4540

4548

4551

4566

4585

5523

6553

7535

9515

9524

9529

---

Vaux_GND

+3V3

AUX_ON|ITV_MSG

POWER_DOWN

+8V

+12VA

Vaux_GND

Vaux_GND1

100MHZ 120R

BAS316

SI2307DS-E3

---

JMP

---

JMP

---

---100MHZ 120R

BAS316

SI2307DS-E3

---

9534

Vaux_GND1

Vaux_GND

7561

I537

3537

68K

PDTC143ZT

I594

I596

6512

BZX384-C18

68K

3546

22u

2510

F578

2591

1n0

470p

2539

3568

47K

1n0

2524

3548

68K

I536

I556

I532

Vaux_GND

3581

22K

I526

BAV21WS

6537

Vaux_GND1

2590

BC847BW

7584

F584

10n

2575

BZX384-C15

6549

BAV21WS

6532

6545

SB340L-7010

2526

100n

Vaux_GND1

L78L33ACZ

7544

10K

3593

1000mAT

1532

I558

2584 470u

2564

9509

100n

I512

68K

3540

I554

4585

I553 7535

SI2307DS

Vaux_GND

16V47u

2558

1534 1

Vaux_GND

F535

10K

3591

220R

3563 6540

BAS316

4566

2K2

BAW56W

3536

Vaux_GND

2586

330p

9529

BAS316

6531

BC857B

7532

I533

I545

RGP10D

6533

33K

Vaux_GND

5521

3592

IMX1

MainSupplyGndA

Vaux_GND

7549-2

HEATSINK

0088

1533

BAS316

6534

3587

2K2

2580

10n

I509

3532

I588

3529

1K2

3560

33R

BC847BW

7577

BAV21WS

6538

3538

Vaux_GND

2523

1n0

I589

6546

STPS10L60D

100n

2543

HEATSINK

0083

BAS316

6543

5523

4551

I538

I599

I563

I592

3528

4M7

I534

3585

68K

3535

7545

4R7

SI2305DS

3544

2K2

I557

9523

100n

2520

SB340L-7010

6544

7583

BC847BW

5526

IMX1

7549-1

BZX384-C12

Vaux_GND1

3594

6542

4548

22K

3586

5K6

82K

I510

3590

I547

Vaux_GND

4523

I565

3534

F577

3533

7516

TCET1103(G)

Vaux_GND1

Vaux_GND

BZX384-C6V8

6547

3588

470K

1n0

2538

F534

7575

PDTC143ZT 2579

10n

I593

Vaux_GND1

F582

100n

2576

4540

220R3561

5527

Vaux_GND

9524

3525

47n

2521

2588

2589

2u2

Vaux_GND

1m0

2536

F537

Vaux_GND1

3562 220R

9554

4567

I539

Vaux_GND1

I568

PDTC143ZT

680R

3542

7547

470u

2587

3549

270R

Vaux_GND

BC857B

3583

5K6

7585

3596

10K

2525

470p

2585

1u0

470u

2534

16V

BAS316

6554

BAS316

6553

SARS03

6550

2578

1n0

2544

2n2

I540

Vaux_GND1

F581

I595

F585

2582

100n

3527

47K

3565

15K

2546

2u2

Vaux_GND

2557

47u 16V

Vaux_GND1

9515

7567

BC847B

Vaux_GND

3595

100K

7525

10u

2583

3539

1K0

3550

220K

7510

3547

68K

3K3

3567

Vaux_GND

F580

2577

100u

SS28411-00

5504

3553

27K

3543

10K

STPS10L60D

6552

56K

3530

I590

I529

2528

470n

Vaux_GND

2K2

3545

F586

I528

I531

3589

10K

Vaux_GND1

3551

4R7

MAINSUPPLYGND

1535

6539

SB340L-7010

7576

BC847BW

I560

2535

I597

3526

68K

3566

3597

47K

68p

2592

SI2307DS

7509

5524

10u

9536

3531

1K0

TL431CZ-AP

7542

Vaux_GND1

I530

BAS316

6536

3598

Vaux_GND1

F583

2556

47u

9530

16V

2555

47u 16V

7543

L78L33ACZ

+3V

+5V

+8VA

Stdby_con

+6VA

+5V

+3V3A

+6V

+6VA

VDC

+3V3A+8V

AC_IN

VCC

+3V3A

1.27V On

1.45V Off

15.5 On

11.5 Off

21 On

11.8 Off

FIGURE 2 - AUXILIARY POWER SUPPLY

Page 6

Main power supply (Figure 3)

The Main Power supply provides the VBAT (141 volt), and Audio voltage supplies. This sup-

ply is switched Off during the Standby mode. During Standby the STBY_Con line is High

which turns Transistor 7573 On. This causes the opto-isolator 7513 to turn On hard. This

places a higher voltage on the control Pin of IC 7511 causing the IC to shut down. The

operating voltage from the Auxiliary supply keeps a small voltage on Pin 2 of 7511 to prevent

it from cycling On and Off. Output from Pin 11 of 7511 drives FET 7512 which drives

Transformer 5512. When Pin 2 of 5512 goes High, Transistor 7514 is switched On turning

7512 Off. This is to prevent 5512 from becoming saturated.

When the set is turned On, the STBY_Con line goes Low switching 7573 Off. The VBAT

supply is the reference voltage for regulation. Since this voltage is missing during startup, the

Shunt Regulator 7571 is turned Off. The voltage on Pin 6 of 7511 goes Low, which turns the

drive from the IC On. When the set is On during normal operation, the supply voltage on Pin

2 of the IC is supplied by Pin 2 of Transformer 5512. When the VBAT supply reaches the

correct voltage, Pin 3 of the Shunt Regulator 7571 reaches 2.5 volts switching it On. This

switches the opto-isolator On to provide a regulation feedback path.

Transistor 6551 provides a power on ramping of

the VBAT supply.

7512 drive test points.

Page 7

-T

REF

Vcc

Gnd

Ctrl

START-UP

CURRENT SOURCE

VALLEY

START-UP

CURRENT SOURCE

CURRENT

SENSING

OUTPUT

DRIVER

OVER

POWER

LOGIC

CONTROL

CIRCUIT

MAXIMUM

ON-TIME

PROTECTION

VOLTAGE

CONTRLLED

OSCILLATOR

OVER

TEMPERATURE

PROTECTIOM

POWER-ON

RESET

SUPPLY

MANAGEMENT

FREQUENCY

PROTECTION

CONTROL

INPUT

CONTROL

CIRCUIT

BURST

DETECTOR

Drain

HVS

Sense

Demag

Driver

9V3

HOT GROUND

RES

15V5

HOT

TUNER IF

Front Interface Panel

FOR MAINS 120V AC 170V (177V)

100n

RES

(For

TEA1506T/N1

2V3

..V.. Normal Operation

POWER SUPPLY

160V

T4E.250V

Lightning Protection

Vbat

AUDIO OUTPUT

1572

"$"

140V

Provision For

15V6

COLD

0R1

16V4

2506

33n

RES

LKS1AF

DEGAUSSING COIL

SET

MAIN RANGE

REGION

For ITV only

Provision For

RES

AC Main Plug

From 1505 Of

For EMC

470P

2X10w

---

JMP

---

JMP

+16V

1577

2506

5500

9502

9504

9506

297V

COLD GROUND

(..V..) Standy Mode

For ITV Only

1n5

TO 1013 OF

RES

8V2

295V

1n5

2V3

-16V

Protection)

2V2

RES

16V4

RES

RGP10D

Lightning Protection

"$"

8V2

Lightning

9577

9572

143V

30WSRF-HD

2X10w

143V

27VRF-HDLR

NAFTA

1502

PFC5000

AUDIO_GND1

1546

-Vaudio

+Vaudio

AC_IN

9572

BAS316

6514

6551

STPS10L60D

6564

I525

I543

100n

2516

47K

3541

I542

5561

100u

2552

6563

I584

I583

3579

F562

2K2

5564

DMF2405H60

I501

5502

I513

9506

I561

3500

3M3

3516

2505

5512

1M5

3504

2503

2n2

I502

F573

1K0

3515

F503

I527

Audio_Gnd

2502

PFC5000

1501

3M3

1505

F506

3501

22u

5563

AUDIO_GND2

1510

2574

1n0

1500

9513

9512

3509

2R0

2n2

2504

I522

9511

TCET1103(G)

7513

3508

220R

7512

22u

2511

2562

50V

F563

470p

2565

F541

I562

3520

I582

I521

I581 I552

I580

7571

TL431CZ-AP

1507

3523

4R5

2541

47u 25V

9503

2508

100n

1N5062

5551

6575

27u

5552

3502

I505

PDTC114ET

7573

F509

3519

15K

9510

MainSupplyGnd

47K

3522

2518

10n

I515

I508

3574

7511

I511

15n

2571

2542

F501

F552

3524

47K

9505

I576

F504

3575

82K

3K3

AUDIO_GND1

3521

3573

15K

BC857B

7541

1n0

2517

3571

F502

MainSupplyGndA

I551

9500

2515

470p 5511

F500

I573

I578

AUDIO_GND2

I574

2K2

3513

4K7

3576

I520

I519

F507

6511

I514

AUDIO_GND1

Vaux_GND1

F510

6562

9563

F508

F542

2512

3M3

3506

4R73511

F564

F565

9577

1577

2.5AF

I506

I579

2551

1n0

2563

2501

100p

2519

2.5AF

1572

I571

F561

5562

3505

2570

2507

10n

2572

3510

7514

BC847B

3517

330K

2R0

1K2

I524

I572

3512

I517

BZX384-C12

6541

5500

2514

I523

2561

1n0

3518

9502 Vaux_GND1

3K3

9501

I518

DMF2405H60

5501

1503

AUDIO_GND2

470n

I507

2500

9504

6500

5506

DMF35

1504

3514

3503

DSP-301N

2509

2513

470p

1545

I516

5513

1u0

VCC

Stdby_Con

+Vaudio

VDC

Vbatt

+6V

14 On

2.8 Off

0.6V Off

1.3V On

FIGURE 3 - MAIN POWER SUPPLY

Page 8

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