1 Safety Precautions
1.1. General Guidelines
1. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or
damaged by the short circuit.
2. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.
3. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.
1.2. Touch-Current Check
1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a measuring network for touch currents between each exposed metallic part on the set and a good earth ground such
as a water pipe, as shown in Figure 1.
3. Use Leakage Current Tester (Simpson 228 or equivalent) to measure the potential across the measuring network.
4. Check each exposed metallic part, and measure the voltage at each point.
5. Check each exposed metallic part, and measure the voltage at each point.
6. The potential at any point (TOUGH CURRENT) expressed as voltage U1 and U2, does not exceed the following values:
For a. c.: U1 = 35 V (peak) and U2 = 0.35 V (peak);
For d. c.: U1 = 1.0 V,
NOTE :
The limit value of U2 = 0.35 V (peak) for a. c. and U1 = 1.0 V for d. c. correspond to the values 0.7 mA (peak) a. c. and 2.0mA
d. c.
The limit value U1 = 35 V (peak) for a. c. correspond to the value 70 mA (peak) a. c. for frequencies greater than 100 kHz.
7. In case a measurement is out of the limits specified, there is a possibility of a shock hazard, and the equipment should be
repaired and rechecked before it is returned to the customer.
Figure 1
4
TX-37LX75Y-IRAN
Summary of Contents for TX-37LX75Y-IRAN
Page 8: ...8 TX 37LX75Y IRAN ...
Page 9: ...5 Chassis Board Layout 9 TX 37LX75Y IRAN ...
Page 11: ...7 Disassembly for Service 7 1 AC CODE INSTALLATION 11 TX 37LX75Y IRAN ...
Page 12: ...7 2 BRACKET INSTALLATION 12 TX 37LX75Y IRAN ...
Page 13: ...7 3 Installation Pedestal 13 TX 37LX75Y IRAN ...
Page 14: ...7 4 EMI 14 TX 37LX75Y IRAN ...
Page 15: ...7 5 VESA PLATE INSTALLATION 15 TX 37LX75Y IRAN ...
Page 16: ...7 6 LCD PANEL ASSY INSTALLATION 16 TX 37LX75Y IRAN ...
Page 18: ...18 TX 37LX75Y IRAN ...
Page 19: ...9 Adjustment 9 1 Voltage chart of A Board 9 2 Voltage chart of AP board 19 TX 37LX75Y IRAN ...
Page 20: ...9 3 DVCO adjustment 20 TX 37LX75Y IRAN ...
Page 23: ...11 Schematic Diagram 11 1 Schematic Diagram Notes 23 TX 37LX75Y IRAN ...
Page 24: ...11 2 A Board 11 2 1 A Board 1 10 1A 2A 3A 4A 5A 6A 8A 7A 9A 24 TX 37LX75Y IRAN ...
Page 25: ...11 2 2 A Board 2 10 1B 2B 3B 4B 5B 7B 6B 8B 1A 2A 3A 4A 5A 6A 8A 7A 9A 25 TX 37LX75Y IRAN ...
Page 26: ...11 2 3 A Board 3 10 1C 2C 3C 4C 5C 8C 7C 6C 9C 1B 2B 3B 4B 5B 7B 6B 8B 26 TX 37LX75Y IRAN ...
Page 27: ...11 2 4 A Board 4 10 1D 2D 3D 4D 6D 5D 7D 1C 2C 3C 4C 5C 8C 7C 6C 9C 27 TX 37LX75Y IRAN ...
Page 28: ...11 2 5 A Board 5 10 1E 2E 3E 4E 6E 5E 7E 1D 2D 3D 4D 6D 5D 7D 28 TX 37LX75Y IRAN ...
Page 29: ...11 2 6 A Board 6 10 1F 2F 3F 4F 6F 5F 7F 1E 2E 3E 4E 6E 5E 7E 29 TX 37LX75Y IRAN ...
Page 30: ...11 2 7 A Board 7 10 1G 2G 4G 3G 5G 6G 7G 1F 2F 3F 4F 6F 5F 7F 30 TX 37LX75Y IRAN ...
Page 31: ...11 2 8 A Board 8 10 1G 2G 4G 3G 5G 6G 7G 1H 2H 5H 6H 3H 4H 7H 8H 31 TX 37LX75Y IRAN ...
Page 32: ...11 2 9 A Board 9 10 1H 2H 5H 6H 3H 4H 7H 8H 1I 2I 5I 6I 7I 3I 4I 8I 9I 32 TX 37LX75Y IRAN ...
Page 33: ...11 2 10 A Board 10 10 1I 2I 5I 6I 7I 3I 4I 8I 9I 33 TX 37LX75Y IRAN ...
Page 34: ...11 3 AP Board 11 3 1 AP Board 1 4 1A 2A 3A 4A 5A 6A 7A 8A 9A 34 TX 37LX75Y IRAN ...
Page 35: ...11 3 2 AP Board 2 4 1B 2B 3B 5B 4B 6B 7B 1A 2A 3A 4A 5A 6A 7A 8A 9A 35 TX 37LX75Y IRAN ...
Page 36: ...11 3 3 AP Board 3 4 1C 2C 3C 5C 4C 6C 7C 1B 2B 3B 5B 4B 6B 7B 36 TX 37LX75Y IRAN ...
Page 37: ...11 3 4 AP Board 4 4 1C 2C 3C 5C 4C 6C 7C 37 TX 37LX75Y IRAN ...
Page 38: ...11 4 V Board 11 4 1 V Board 1 2 1A 2A 3A 4A 38 TX 37LX75Y IRAN ...
Page 39: ...11 4 2 V Board 2 2 1A 2A 3A 4A 39 TX 37LX75Y IRAN ...
Page 40: ...11 5 G Board 11 5 1 G Board 1 2 1A 2A 3A 4A 5A 40 TX 37LX75Y IRAN ...
Page 41: ...11 5 2 G Board 2 2 1A 2A 3A 4A 5A 41 TX 37LX75Y IRAN ...
Page 42: ...11 6 P Board 11 6 1 P Board 1 2 1A 2A 3A 4A 5A 6A 7A 8A 9A 42 TX 37LX75Y IRAN ...
Page 43: ...11 6 2 P Board 2 2 1A 2A 3A 4A 5A 6A 7A 8A 9A 43 TX 37LX75Y IRAN ...
Page 44: ...11 7 K Board 11 7 1 K Board 1 1 44 TX 37LX75Y IRAN ...
Page 45: ...12 Parts Location Mechanical Replacement Parts List 12 1 Parts Location 45 TX 37LX75Y IRAN ...
Page 46: ...13 Packing Exploded View 13 1 BOTTOM PACKING CASE INSTALLATION TX 37LX75Y IRAN 46 ...
Page 47: ...13 2 TOP PACKING CASE INSTALLATION TX 37LX75Y IRAN 47 ...
Page 48: ...13 3 Packing TX 37LX75Y IRAN 48 ...
Page 49: ...14 Replacement Parts List 49 TX 37LX75Y IRAN ...
