Philips L05HD Schematic

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 processing 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 processing 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

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.

Main		Features
Picture	Timer	Timer	Timer
Sound	Rotation	Rotation	Start Time
Features	AutoLock	AutoLock	Stop Time
Install	Active Control	Active Control	Channel
	Digi. Pic. Demo	Digi. Pic. Demo	Activate
			Display

Features		Features
Timer	Access Code	T imer	Access Code
Rotation	- - - -	Rotation	XXXX
AutoLock		AutoLock
Active Control		Active Control
Digi. Pic. Demo		Digi. Pic. Demo

Features		Features
T imer	Access Code	T imer	New Code
Rotation	XXXX	Rotation	- - - -
AutoLock	Incorrect	AutoLock
Active Control		Active Control
Digi. Pic. Demo		Digi. Pic. Demo

Features		AutoLock
T imer	Confirm Code	Block Channel
Rotation	XXXX	Setup Code	Of fStop T ime
AutoLock		Clear All	Channel
Active Control		Block All	Activate
Digi. Pic. Demo		Movie Rating	Display
		TV Rating

	1	2
		4

2 3 4 5

6

7

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.

Page 4

FIGURE 1 - POWER SUPPLY BLOCK

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 resistors 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

6 Page

AUXILIARY POWER SUPPLY

I565

2586

VCC

21 On

330p

2585

1u0

2582

100n

6532

*

2592

11.8 Off

BAV21WS

4551

E

7585

68p

I560

*

3551

I510

2524

0V

BC857B

4585

1n0

4V5

BZX384-C18

4R7

*

B

6512

2526

100n

2510

22u

6533

C

RGP10D

3V7

3589

10K

AC_IN

I553

3599

1M5

15.5 On

-2FIGURE

2528

470n

3528

4M7

6531

BAS316

3598

330K

7510

C15-BZX384

11.5 Off

I554

15V8

6549

TEA1507

2

Vcc

SUPPLY

START-UP

Drain

14

15V9

CURRENT SOURCE

158V

MANAGEMENT

3527

47K

F581 3

Gnd

VALLEY

3550

VOLTAGE

HVS

CONTRLLED

I509

FREQUENCY

OSCILLATOR

START-UP

Demag

7

220K

CONTROL

CURRENT SOURCE

7532

E

OVER

LOGIC

BC857B

15V8

TEMPERATURE

CONTROL

Sense

9

PROTECTIOM

CIRCUIT

CURRENT

0V

B

SENSING

AUXILIARY

C

POWER-ON

OUTPUT

Driver

11

INPUT

RESET

DRIVER

3V4

0V

6

Ctrl

CONTROL

1V3

CIRCUIT

MAXIMUM

OVER

BURST

ON-TIME

POWER

DETECTOR

PROTECTION

PROTECTION

3597

POWER

47K

IMX1

0V6

3595

100K

0V6

IMX1

3593

10K

2521

47n

3529

1K2

1.27V On

I512

1.45V Off

C

15V8

7549-2

B

I597

C

7549-1

SUPPLY

3540

---

---

3596

10K

B

22K

2583

10u

3594

E

E

REGION

NAFTA

SIZE

27VRF-HD

30WSRF-HD

3548

---

---

3551

---

---

3566

---

---

4523

---

---

4540

JMP

JMP

4548

---

---

4551

JMP

JMP

4566

---

---

4585

---

---

5523

100MHZ--- 120R 100MHZ--- 120R

6553

BAS316

BAS316

7535

SI2307DS-E3 SI2307DS-E3

9515

---

---

9524

---

---

9529

---

---

9530

---

---

9534

---

---

To 1533 Of

1533

+3V3A

+3V3A

1

+8V

VDC

1534

2

1

Source Select +

3

Vaux_GND

Vaux_GND1

2

Microcontroller

4

9509

3

5

1000mA

Vaux_GND

1532

3535

4R7

6

8

4567

4

6

Vaux_GND1 9554

5

7

Vaux_GND

MAINSUPPLYGND

T

7

Vaux_GND

9

I557

8

10

+5V

11

*9523

9536

+6VA

12

F534 I534

2580

10n

3592

33K

2544

2n2

Vaux_GND1

Vaux_GND1

C

A4

3V2

POWER_DOWN

I538

3563

6540

I588

6542

F577

6543

B

7561

I563

3525

I528

I595

220R

BAS316

BZX384-C12

BAS316

0V

PDTC143ZT

To 1405

2564

100n

Of

2539

3565

Vaux_GND E

300K

*

3560

+8VA

BAS316

470p

Vaux_GND1

15K

9534

3588

470K

6534

3567

3K3

3534

*

6550

I556

I558

*5523

6539

5524

F578

*

7535

33R

+12VA

Deflection

I564

Controller

SI2307DS

SARS03

*4523

SB340L-7010

0086

10u

F582

1535

1

E

2536

1m0

HEATSINK

2534

470u16V

L78L33ACZ

*9530

3536

I568

5504

2

6

7

3

7543

2K2

5

8

Vaux_GND1

B

I599

I536

5521

Vaux_GND1

Vaux_GND

3546

68K

1

IN

OUT

3

+8V

Vaux_GND1

2

1

C

0V1

4

9

6544

F583

BAS316

47u16V

COM

47u16V

3568

47K

6536

I533

2522

6546

2555

2556

2

3V4

7567

I537

10

BC847B

SB340L-7010

2

11

470p

STPS10L60D

Vaux_GND1

1

12

Vaux_GND

2538

5526

F584

Vaux_GND1Vaux_GND1

+3V

I540

F535

*

*

7525

158V

1n0

2

1

SS28411-00

0083

1n0

2535

4m76V3

3545

2K2

470U

2584470u

3561220R

3562220R

3547

*

+3V3

S

2523

0088

HEATSINK

3526

I526 G

D

9524

F580 +3V3A

HEATSINK

I530

3V4

0V

2

3

2525

470p

I532

1

2

Vaux_GND

Vaux_GND

Vaux_GND

68K

0V

1

2546

I589

7545

3530

I531

1K0

3538

3532

BAV21WS

BAV21WS

6545

2590

10V3m3

2587

470u

I545

68K

68K

68K

SI2305DS

3531

2u2

BAS316

56K

*

*3533

*6537

SB340L-7010

I594

5527

4540

3540

4548

3548

6553

2520

I539

470U

100n

2591

*

*

*

*

*

6538

1n0

3537

I547

6552

7516

3542

2u2

6554

BAS316

4566 3566

68K

7547

I596

1

4 TCET1103(G)

I590

STPS10L60D Vaux_GND1

Vaux_GND1

2589

C PDTC143ZT

*

**

20V

9V

3539

680R

5V7

B

B

3549

3

2

1K0

3543

2543

9515

E

2V

A4

I529

*

0V

270R

1V5

8V

I592

10K

100n

6V

*7509

8V1

2588

AP

1

2578

3553

F585

SI2307DS

Vaux_GND

F537

+6VA

K

1n0

7542

-

2

REF

Vaux_GND

1

3 F586

+5V

TL431CZ

3

Vaux_GND

2V5

I593

3544

L78L33ACZ

A

2K2

IN

OUT

3587

2K2

B

3583

5K6

6547

-BZX384C6V8 3590

82K

3586

5K6

3585

68K

2558

47u16V

2

2557

47u16V

COM

Vaux_GND

C

9V

2576

2575

10n

0V

3591

100n

Vaux_GND1

Vaux_GND1 Vaux_GND1

E 0V PDTC143ZT

10K

C

BC847BW

Vaux_GND MainSupplyGndA

7575

7577

0V

0V

2579

B

Vaux_GND

0V7

Vaux_GND

C

10n

E

7576

B

Vaux_GND

BC847BW

0V7

C BC847BW

3581

* 9529

Stdby_con

E

7583

7584

A4

6548

B

C BC847BW

22K

BAW56W

10V7

AUX_ON|ITV_MSG

Vaux_GND

2577

A4

B

Vaux_GND

E

0V

100u

E	Vaux_GND
Vaux_GND
Vaux_GND

Main power supply (Figure 3)

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

8Page

POWER SUPPLY

MAIN RANGE

LR

REGION

NAFTA

SET

27VRF-HD 30WSRF-HD

Vbat

143V

143V

AUDIO OUTPUT

2X10w

2X10w

1572

---

---

1577

---

---

2506

---

---

5500

---

---

9502

---

---

9504

---

---

AC_IN

+Vaudio

9506

JMP

JMP

I543

9572

JMP

JMP

9577

JMP

JMP

I506

*

9506

1503

3508

2506

I583

LKS1AF 4

2

I582

DEGAUSSING COIL

2

220R

33n

9512

F501

2501

RES

Rs 4R5

Rh

+T

5

*

3541

47K 6541

BZX384-C12

3

4

2

F502

4R5

3

1

1504

1

5502

F500

1

3523

I542

1

8

16V4

16V4

5564

DMF2405H60

F541

1

4

1501

1502

3502

I525

3503

I501

7541

47u25V

2

3

2541

PFC5000

PFC5000

DSP-301N

BC857B

*

*

3FIGURE

F507

* V

I581

*

3504

1M5

2502

RES

2508

100n

3510

T-

I507

RES

OnlyITVFor

2n2 2503

2

2505

RES

*

Vaux_GND1

5551

I552

6551

3

RES

5506

4

18

1

9505

I502

9513

2n2

3

F542

I580

AC Main Plug

RES

F508 "$"

VDC

Or

1500

2

3

6500

Vaux_GND1

From 1505 Of

T4E.250V

RES

DMF35

1

*

4

*

2542

9510

F503

F506

9501

*

9502

3509

2504

2507

1505

For ITV only

1

5501

4

1

5500

4

-T

2R0

1507

*

Audio_Gnd

AUDIO_GND2

AUDIO_GND1

Front Interface Panel

9500

2500

470n

3505

2R0

9511

1

2

3

2

3

2

2

1

F509

DMF2405H60

I584

9504

F504

9503

5512

-

3513

I514

2

17

I551

F552

5552

1

POWERMAIN

Vbatt

3

27u

140V

7514

2K2

16

2551

2

2552

3M3 2509

3501 3500

3M3

2511

50V22u

PROTECTIOM

CIRCUIT

CURRENT

0V

3514

*

BC847B

0V

47K 6514

I521

1n5

F510

5511

470p

470P

I571

1n0

I572

3571

I522

3M3

TEA1506T/N1

I517

3524

BAS316

I524

3K3

4

15

1n0

*

160V 100u

9572

3521

STPS10L60D

I505

2V3

I515

5

14

7511

13

*

5562

6563

F563

*

F564

I511

2

Vcc

START-UP

Drain

14

I513

*

I579

2565*

1572

-Vaudio

3506

1n5

SUPPLY

7512

2563

F562

-16V

15V5

MANAGEMENT

CURRENT SOURCE

297V

D 295V

I516

12

*

F 2.5A

3

Gnd

VALLEY

2V3

S 0V

8

11

AUDIO_GND1

470p

AUDIO_GND1

*

VOLTAGE

HVS

G

I562

9577

9

10

AUDIO_GND2

5561

6562

F561

F565

CONTRLLED

1577

OSCILLATOR

START-UP

Demag

7

2514

2515

2561*

*2562

*

+Vaudio

1510

I508

FREQUENCY

I561

+16V

CONTROL

CURRENT SOURCE

0V

2570

TO 1013 OF

OVER

LOGIC

F 2.5A

3522

3515

TEMPERATURE

CONTROL

Sense

9

AUDIO_GND2

SUPPLY

SENSING

47K

1K0

+6V

TUNER IF

14 On

RGP10D

2517

1n0

330K

2513

470p

2516

2519

100p

0R1

6575

1N5062

3520

*

3511 4R7

9V3

*

AP

K

2574

1n0

3573

15K

3575

82K

8V2

2572

10n

(For

6511

2.8 Off

POWER-ON

OUTPUT

Driver

11

I519 100n

I518

3516

15V6

4

1

I574

Lightning

INPUT

RESET

DRIVER

2V2

3579

Protection)

6

Ctrl

CONTROL

2K2

7573

0V

CIRCUIT

PDTC114ET

MAXIMUM

OVER

3517

I523

5V 3

2

8V2

I573

2571

I576

BURST

ON-TIME

DETECTOR

PROTECTION

POWER

F573

Stdby_Con

PROTECTION

5513

2518

15n

7513

A4

I520

1u0

10n

TCET1103(G)

1

TL431CZ-

3519

15K

3512

1K2

2512

100n

7571

2

REF

3

3574

3576

4K7

I527

3518

0.6V Off

3K3

A

*

1.3V On

1545

Provision For

For EMC

Lightning Protection

5563

HOT

COLD

1546

VCC

22u

Provision For

9563

Lightning Protection

MainSupplyGnd

MainSupplyGndA

"$" FOR MAINS 120V AC 170V (177V)

..V.. Normal Operation

(..V..) Standy Mode

HOT GROUND

COLD GROUND