Text preview for : 13.Circuit Description.pdf part of Samsung LE32R81_86 Full service manual for models: LE23R86BD LE23R87BD LE23R88BD LE23R86WD LE26R86BD LE32R86BD LE32R81BX LE37R86BD LE37R81BX LE40R86BD LE40R81BHX LE23R86BCX LE26R86BCX LE32R86BCX LE37R86BCX LE40R86BCX



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13 Circuit Descriptions

13 Circuit Descriptions
13-1 Block description

Signal Power

IP Board

RF IN Scart 1,2 A/V S-Video Component HDMI 1, 2 PC Main Board

Panel T-con Board

Speaker

IR/LED
Bordeaux consists of three main blocks 1. Main board : Video signal processing 2. IP board : Power supply & Inverter 3. T-con board : LCD Panel control

13-1

13 Circuit Descriptions

Signal Power

SMPS

INVERTER

RF IN Scart 1,2 A/V S-Video Component HDMI 1, 2 PC Main Board

Panel T-con Board

Speaker

IR/LED

Bordeaux consists of three main blocks 1. Main board : Video signal processing 2. SMPS : Power supply 3. T-con board : LCD Panel control

13-2

13 Circuit Descriptions

13-2 Main Block

13-3

13 Circuit Descriptions

13-3 SMPS Board
13-3-1 23" Power Block

Line Filter Part

AC Rectifier

PFC Switching Part

PFC Rectifier

Resonance Switching Part

Resonance Transformer

Output Rectifier Part

Inverter SMPS 24V DC/DC MC33167 Signal 5.3V Signal 13V

AC Input (90Vac~264Vac)

PFC Controler TDA4863

Resonance Controller MC33067

On/Off Control

Regulator KA78R09

Sound 12V

Stand-By Controller VIPer12A

On/Off ST-BY Transformer Output Rectifier Part Stand-By 5.2V

13-3-2 23" SMPS Diagram

PFC

Rectifier EMI FILTER
INPUT AC Input 90V~264V

PFC DC Output

Current Resonant Type Trans EER3944

INVERTER 24V

TDA4863

450V 150uF Main +13V F222L Regulator Sound +9V
Trans EE2020

DC/DC Converter VIPer12A

V5D +5.3V Stand-By 5.2V

On/Off Control

Power On/Off Signal

13-4

13 Circuit Descriptions

Output Name

Output Voltage

Output Current Load Characteristics PCB Loc. Usage Remark
Typical Peak 3.0V 4.0V Pulsating Main B'D Drive Drive, Logic, Buffer, Image Digital Image Analog -

Normal Regulation(%) Variable Range Min

24V

24.5V

±4 ±5

23.52V ~25.48V 5.13V ~5.67V 11.9V ~13.7V 8.83V ~9.57V 5.58V ~8.5V

0.1V

5.3V

5.3V

0.1V

3.0V

5.0V

Constant

Main B'D

-

13V Vamp ST-BY

12.7V

±7 ±4 ±5

0.01V

0.3V

0.5V

Constant

Main B'D Main B'D

-

9.2V

0.01V

0.3V

1.1V

Constant

Sound

-

8.0V

0.1V

0.3V

0.6V

Constant

Main B'D

Stand-by

-

13-5

13 Circuit Descriptions

13-3-3 26", 32" Power Block

Line Filter Part

AC Rectifier

PFC Switching Part

PFC Rectifier

Resonance Switching Part

Resonance Transformer

Output Rectifier Part

Inverter SMPS 24V DC/DC MC33167 Signal 5.3V Signal 13V

AC Input (90Vac~264Vac)

PFC Controler FAN7530

Resonance Controller MC33067

On/Off Control

Regulator KA278R12

Sound 12V

Stand-By Controller FSQ0165R

On/Off ST-BY Transformer Output Rectifier Part Stand-By 5.2V

13-3-4 26", 32" SMPS Diagram

PFC

Rectifier EMI FILTER
INPUT AC Input 90V~264V

PFC DC Output

Current Resonant Type Trans EER4445

INVERTER 24V

450V 150uF FAN7530 Main +13V MC33067 Regulator Sound +12V
Trans EE2020

DC/DC Converter FSQ0165R

V5D +5.3V Stand-By 5.2V

On/Off Control

Power On/Off Signal

13-6

13 Circuit Descriptions

Output Name

Output Voltage

Output Current Load Characteristics PCB Loc. Usage Remark
Typical Peak 3.0V 4.0V Pulsating Main B'D Drive Drive, Logic, Buffer, Image Digital Image Analog -

Normal Regulation(%) Variable Range Min

24V

24.5V

±4 ±5

23.52V ~25.48V 5.13V ~5.67V 11.9V ~13.7V 8.83V ~9.57V 5.58V ~8.5V

0.1V

5.3V

5.3V

0.1V

3.0V

5.0V

Constant

Main B'D

-

13V Vamp ST-BY

12.7V

±7 ±4 ±5

0.01V

0.3V

0.5V

Constant

Main B'D Main B'D

-

9.2V

0.01V

0.3V

1.1V

Constant

Sound

-

8.0V

0.1V

0.3V

0.6V

Constant

Main B'D

Stand-by

-

13-7

13 Circuit Descriptions

13-3-5 37" Power Block

Line Filter Part

AC Rectifier

PFC Switching Part

PFC Rectifier

Resonance Switching Part

Resonance Transformer

Output Rectifier Part

Inverter SMPS 24V DC/DC MC33167 DC/DC LM2576 Signal 5.3V Signal 13V

AC Input (90Vac~264Vac)

PFC Controler TDA4863

Resonance Controller F9222L

On/Off Control

Regulator KA278R12

Sound 12V

Stand-By Controller Viper22A

On/Off ST-BY Transformer Output Rectifier Part Stand-By 5.2V

13-3-6 37" SMPS Diagram

PFC

Rectifier EMI FILTER
INPUT AC Input 90V~264V

PFC DC Output

Current Resonant Type Trans EER4445

INVERTER 24V

TDA4863

450V 150uF

DC/DC Converter Regulator

Main +13V

F9222L

Sound +12V / +9V
Trans EE2020

DC/DC Converter Viper22A

V5D +5.3V Stand-By 5.2V

On/Off Control

Power On/Off Signal

13-8

13 Circuit Descriptions

13-3-7 40" SMPS

Rectifier AC Input 90264Vac EMI Filter RFC
Control

13.5V / 1.0A Regulator 12.0V / 1.2A

Transformer

Rectifier

PWM Control Vcc

PWM Control Vcc

Rectifier Switching FET Feed-back Protection

5.4V / 3.4A

VCC On/Off

Stand-by Control

Transformer

Rectifier Feedback Protection

5Vsb 0.4A

PRIMARY

SECONDARY

13-3-8 40" INVERTER

SWITCHING P F C HV DRIVE

TRANSFORMER 2nd Resonant Jin Balance Board

C C F L

C C F L

UVLO

PhotoCoupler CONTROLLER

Voltage / Current / Detection

LAMP Detection

ON/OFF

P_DIM

Current Controller

Voltage Controller

PROTECTION

13-9

13 Circuit Descriptions

13-3-9 HOT Balance Block Diagram

13-3-10 COLD Balance Block Diagram

13-10