Text preview for : 13.Circuit Description.pdf part of Samsung LE32R81_86 Full service manual for models:
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LE26R86BD
LE32R86BD
LE32R81BX
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LE40R86BD
LE40R81BHX
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LE26R86BCX
LE32R86BCX
LE37R86BCX
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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