Philips BDL46xxE 4
CHAPTER C
SAFETY PRECAUTIONS
1. Caution
No modification of any circuit should be attempted. Service work should only be performed after you
are through familiar with all of the following safety checks and servicing guide lines.
2. Safety check
Care should be taken while servicing this LCD display. Because of the high voltage used in the
inverter circuit. These voltage are exposed in such areas as the associated transformer circuits.
3. Power supply requirements
The external power converter for this display utilizes AC and DC cords, AC cord is detachable, but DC
cord is permanently attached. Any attempt to replace another adapter could result in serious problem
on the display.
4. Leakage current hot check
4-1
Plug the AC cord directly into the AC outlet. Do not use an isolation transformer during this check.
4-2
Connect a 1500 ohm, 10 watt resistor, paralleled by a 0.15uF capacitor between each metallic
part and a good earth ground.
4-3
Use an AC voltmeter with 1000 ohm / volt or more sensitivity and measure the AC voltage across
the combination 1500 ohm resistor and 0.15uF capacitor.
4-4
Move the resistor connection to each exposed metallic part and measure the voltage.
4-5
Reverse the polarity of the AC plug in the AC outlet and repeat the above measurement.
4-6
Voltage measured must not exceed 1.5 volt RMS, from any exposed metallic part to the ground.
A leakage current tester may be used in the above hot check, in which case any circuit measured
must not exceed 1 milliamp. In the case of a measurement exceeding the 1 milliamp value, a rework is
required to eliminate the chance of a shock hazard.
To Metal Parts
V
AC VOLTMETER
1500
10W
0.15u
.
Earth Ground
Summary of Contents for BDL46xxE
Page 1: ...SERVICE MANUAL Philips BDL46xxE ...
Page 10: ...Philips BDL46xxE 9 5 Outline 5 1 Front view 5 2 Rear view ...
Page 11: ...Philips BDL46xxE 10 5 3 Side view 5 4 Top view ...
Page 19: ...Philips BDL46xxE 18 2 Block diagram ...
Page 21: ...Philips BDL46xxE 20 2 Daughter board ...
Page 22: ...Philips BDL46xxE 21 3 LED board ...
Page 23: ...Philips BDL46xxE 22 4 Sensor board ...
Page 24: ...Philips BDL46xxE 23 5 Main board 5 1 Power ...
Page 25: ...Philips BDL46xxE 24 5 2 HDMI Input ...
Page 26: ...Philips BDL46xxE 25 5 3 HDMI Switch ...
Page 27: ...Philips BDL46xxE 26 5 4 Analog Input ...
Page 28: ...Philips BDL46xxE 27 5 5 Analog Switch and Outpot ...
Page 29: ...Philips BDL46xxE 28 5 6 Scaler ...
Page 30: ...Philips BDL46xxE 29 5 7 DDR SDRAM ...
Page 31: ...Philips BDL46xxE 30 5 8 MCU ...
Page 32: ...Philips BDL46xxE 31 5 9 FAN Control RTC ...
Page 33: ...Philips BDL46xxE 32 5 10 Panel Interface ...
Page 34: ...Philips BDL46xxE 33 5 11 Audio AMP ...
Page 35: ...Philips BDL46xxE 34 5 12 Video Input ...
Page 36: ...Philips BDL46xxE 35 5 13 Audio Input ...
Page 37: ...Philips BDL46xxE 36 5 14 Video Decoder ...
Page 38: ...Philips BDL46xxE 37 5 15 Video Decoder SDRAM ...
Page 39: ...Philips BDL46xxE 38 5 16 RS232 ...
Page 40: ...Philips BDL46xxE 39 6 Power board ...
Page 42: ...Philips BDL46xxE 41 4 Main board ...
Page 43: ...Philips BDL46xxE 42 5 Power board ...
Page 44: ...Philips BDL46xxE 43 ...
Page 45: ...Philips BDL46xxE 44 CHAPTER 7 EXPLODED VIEW ...
Page 46: ...Philips BDL46xxE 45 ...
Page 47: ...Philips BDL46xxE 46 ...