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13 Circuit Descriptions
13 Circuit Descriptions
13-1 Block description
Signal
Power
IP Board
RF In (Air, Cable)
Scart 1,2
A/V
S-Video Main
Board Panel
Component T-con
Board
DVI-D
PC
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 (Air, Cable)
Scart 1,2
A/V
S-Video Main
Board Panel
Component T-con
Board
DVI-D
PC
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 SMPS Board
13-2-1 32" Power Block
Line PFC Inverter
Resonance
Filter AC Switching PFC Resonance SMPS
Switching
Part Rectifier Part Rectifier Transformer Output 24V
Part
Rectifier
Part DC/DC Signal
MC33167 5.4V
AC Input PFC Resonance
(90Vac~264Vac) Controler Controller
Signal
TDA4863 F9222L
13V
Regulator Sound
On/Off 9V or 12V
Control
On/Off
Stand-By
Controller Stand-By
Viper22A 6V
13-2-2 32" SMPS Diagram
PFC PFC DC Current
Rectifier Output Resonant Type ER3942
EMI INVERTER
FILTER 24V
INPUT
450V
AC Input 120uF
90V~264V TDA4863 Main
+13V
F9222L Regulator
Sound
+9V / +12V
Trans EE2020
DC/DC V5D
Converter +5.4V
Viper22A
Stand-By
6V
On/Off Power On/Off
Control Signal
13-3
13 Circuit Descriptions
13-2-3 BN96-03057A
Output Voltage Output Current
Output
Load Characteristics PCB Loc. Usage Remark
Name
Normal Regulation(%) Variable Range Min Typical Peak
24V 24.5V 4 23.52V 0.1V 3.0V 4.0V Pulsating Main B'D Drive -
~25.48V
Drive, Logic,
5.13V Main B'D -
5.4V 5.4V 5 0.1V 3.0V 5.0V Constant Buffer,
~5.67V
Image Digital
12.7V 7 11.9V 0.01V 0.3V 0.5V Constant Image Analog -
13V Main B'D
~13.7V
4 8.83V Sound -
Vamp 9.2V 0.01V 0.3V 1.1V Constant Main B'D
~9.57V
5.58V
ST-BY 8.0V 5 ~8.5V 0.1V 0.3V 0.6V Constant Main B'D Stand-by -
13-2-4 BN96-03832A
Output Voltage Output Current
Output
Load Characteristics PCB Loc. Usage Remark
Name
Normal Regulation(%) Variable Range Min Typical Peak
24V 24.5V 4 23.52V 0.0V 5.0V 8.0V Pulsating Main B'D Drive -
~25.48V
Drive, Logic,
5.13V Main B'D -
5.4V 5.4V 5 0.0V 4.0V 5.0V Constant Buffer,
~5.67V
Image Digital
12.7V 7 11.9V 0.0V 0.3V 0.5V Constant Image Analog -
13V Main B'D
~13.7V
4 11.52V Sound -
Vamp 9.2V 0.0V 0.5V 3.0V Constant Main B'D
~12.5V
5.70V
ST-BY 6.0V 5 ~6.30V 0.0V 0.3V 0.6V Constant Main B'D Stand-by -
13-4
13 Circuit Descriptions
13-2-5 32" IP Board
Power EMI Filter RFC SWITCHING TRANSFORMER
Input (switching,
(AC90V Inductor) Rectifier 13.0V / 0.4A
~264V) Rectifier
Rectifier 12.0V / 2.5A
Rectifier 5.4V / 43.5A
Feedback
Protection
FWM FWM Opto- Feedback
CONTROLLER CONTROLLER coupler Protection
VCC
On/Off TRANSFORMER
Stand-by Rectifier 6.2V / 0.4A
CONTROLLER
(Switch)
Feedback
Protection
SWITCHING TRANSFORMER
2nd
Power
Balance
Input LAMP
Resonant Board
(380V)
UVLO Gate
DRIVE
Opto-Coupler / LAMP
Opto-Coupler Pulse-
Transformer
Voltage /
Current /
LAMP /
CONTROLLER Detection
ON/OFF
DIM Feedback
13-5
13 Circuit Descriptions
Memo
13-6