Philips 32PFL4507/F7 - LED Backlight Drive Block Diagram

Philips 32PFL4507/F7

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9-4

4. LED Backlight Drive Block Diagram

IC1001

(LED BACKLIGHT DRIVER)

OVP

CN1001

DRIVE

Q1001

CONTROL

LOGIC

10

16

14

13

1

DRIVE

3

2

DRIVE

5

ILED16

VLED4

ILED27

ILED32

POWER SUPPLY CBA

PROTECT3

BACKLIGHT-ADJ

BACKLIGHT-SW

TO

SYSTEM CONTROL

BLOCK DIAGRAM

P-ON+21V

LCD PANEL ASSEMBLY

PL12.2BLBD

Table of Contents

Service Manual1
Important Safety Notice2
Table of Contents3
Specifications [TYPE A]4
[Type B]5
- Safety Precautions for LCD TV Circuit6
- Leakage Current Hot Check6
Important Safety Precautions6
- Design Alteration Warning7
- Hot Chassis Warning7
- Product Safety Notice7
- Precautions During Servicing8
- Leakage Current Ratings for Selected Areas9
- Clearance Distance9
- Safety Check after Servicing9
- Leakage Current Test9
- Circuit Board Indications10
- How to Remove / Install Flat Pack-IC10
- Pb (Lead) Free Solder10
Standard Notes for Servicing10
- Installation12
- Instructions for Handling Semi-Conductors13
- Ground for Human Body13
- Ground for Workbench13
- Precautions Concerning the LCD Panel Assembly14
- Disassembly Flowchart14
- Disassembly Method14
Cabinet Disassembly Instructions14
- Test Equipment Required19
- How to Set up the Service Mode19
- Service Mode19
Electrical Adjustment Instructions [TYPE A]19
- Purity Check Mode20
- VCOM Adjustment20
- White Balance Adjustment21
[Type B]22
How to Initialize the Lcd Tv26
- User Upgrade27
- Firmware Update Procedure27
Firmware Renewal Mode [TYPE A]27
- Factory Upgrade (Firmware Upgrade/Flash Upgrade)28
- Equipment Required29
[Type B]29
- The Power Cannot be Turned on30
- The Fuse Blows out30
- When the Output Voltage Fluctuates30
Troubleshooting30
- AL+3.3V Is Not Output31
- AMP+24V Is Not Output31
- P-ON+21V Is Not Output31
- The Key Operation Is Not Functioning32
- Picture Does Not Appear Normally32
- Audio Is Not Outputted Normally33
- System Control Block Diagram34
Block Diagrams [TYPE A]34
- Video/Audio Block Diagram35
- Digital Signal Process Block Diagram36
- LED Backlight Drive Block Diagram37
- Power Supply Block Diagram38
[Type B]39
Standard Notes44
Schematic Diagrams / Cba and Test Points44
- How to Read Converged Lines45
- Test Point Information45
- Power Supply Schematic Diagram46
- Function Schematic Diagram47
- Digital Main 1 Schematic Diagram [TYPE A]48
- Digital Main 2 Schematic Diagram [TYPE A]49
- Digital Main 3 Schematic Diagram [TYPE A]50
- Digital Main 4 Schematic Diagram [TYPE A]51
- Digital Main 5 Schematic Diagram [TYPE A]52
- Digital Main 6 Schematic Diagram [TYPE A]53
- Digital Main 1 Schematic Diagram [TYPE B]54
- Digital Main 2 Schematic Diagram [TYPE B]55
- Digital Main 3 Schematic Diagram [TYPE B]56
- Digital Main 4 Schematic Diagram [TYPE B]57
- Digital Main 5 Schematic Diagram [TYPE B]58
- Digital Main 6 Schematic Diagram [TYPE B]59
- Digital Main 8 Schematic Diagram [TYPE B]61
- Power Supply CBA Top View64
- Power Supply CBA Bottom View65
- Function CBA Top View66
- Function CBA Bottom View66
Wiring Diagrams [TYPE A]67
[Type B]68
Exploded Views69
Packing71
Type B71
- Mechanical Parts72
- Lcd Panel Assembly72
Parts List [TYPE A]72
- Electrical Parts73
- Digital Main Cba Unit73
- Power Supply Cba73
- Function Cba74
Type B75
Revision History77

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