3
LC-37HV4M
LC-37HV4H
Precautions for using lead-free solder
1 Employing lead-free solder
PWBs of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the
PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.
Example:
2 Using lead-free wire solder
When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional
lead wire solder may cause damage or accident due to cracks.
As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40°C, we recommend
you to use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit,
contact our service station or service branch in your area.
3 Soldering
As the melting point of lead-free solder (Sn-Ag-Cu) is about 220°C which is higher than the conventional lead
solder by 40°C, and as it has poor solder wettability, you may be apt to keep the soldering bit in contact with the
PWB for extended period of time. However, Since the land may be peeled off or the maximum heat-resistance
temperature of parts may be exceeded, remove the bit from the PWB as soon as you confirm the steady soldering
condition.
Lead-free solder contains more tin, and the end of the soldering bit may be easily corroded. Make sure to turn on
and off the power of the bit as required.
If a different type of solder stays on the tip of the soldering bit, it is alloyed with lead-free solder. Clean the bit after
every use of it.
When the tip of the soldering bit is blackened during use, file it with steel wool or fine sandpaper.
Becareful when replacing parts with polarity indication on the PWB silk.
Indicates lead-free solder of tin, silver and copper.
Lead-free wire solder for servicing
Part No,
★
Description
Code
ZHNDAi123250E
J
φ
0.3mm
250g(1roll)
BL
ZHNDAi126500E
J
φ
0.6mm
500g(1roll)
BK
ZHNDAi12801KE
J
φ
1.0mm
1kg(1roll)
BM
L
F a
Summary of Contents for AQUOS LC-37HV4M
Page 26: ...26 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H CHASSIS LAYOUT ...
Page 27: ...27 17 16 19 18 15 14 13 12 11 10 LC 37HV4M LC 37HV4H ...
Page 33: ...33 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H Ë Ë Ë Ë Ë R C LED Unit Display ...
Page 34: ...34 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H Ë MAIN Unit 1 9 Display ...
Page 35: ...35 17 16 19 18 15 14 13 12 11 10 LC 37HV4M LC 37HV4H ...
Page 36: ...36 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H Ë MAIN Unit 2 9 Display ...
Page 37: ...37 17 16 19 18 15 14 13 12 11 10 LC 37HV4M LC 37HV4H ...
Page 38: ...38 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H Ë MAIN Unit 3 9 Display ...
Page 39: ...39 17 16 19 18 15 14 13 12 11 10 LC 37HV4M LC 37HV4H ...
Page 40: ...40 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H Ë MAIN Unit 4 9 Display ...
Page 41: ...41 17 16 19 18 15 14 13 12 11 10 LC 37HV4M LC 37HV4H ...
Page 42: ...42 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H Ë MAIN Unit 5 9 Display ...
Page 43: ...43 17 16 19 18 15 14 13 12 11 10 LC 37HV4M LC 37HV4H ...
Page 44: ...44 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H Ë MAIN Unit 6 9 Display ...
Page 45: ...45 17 16 19 18 15 14 13 12 11 10 LC 37HV4M LC 37HV4H ...
Page 46: ...46 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H Ë MAIN Unit 7 9 Display ...
Page 47: ...47 17 16 19 18 15 14 13 12 11 10 LC 37HV4M LC 37HV4H ...
Page 48: ...48 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H Ë MAIN Unit 8 9 Display ...
Page 49: ...49 17 16 19 18 15 14 13 12 11 10 LC 37HV4M LC 37HV4H ...
Page 50: ...50 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H Ë MAIN Unit 9 9 Display ...
Page 51: ...51 17 16 19 18 15 14 13 12 11 10 LC 37HV4M LC 37HV4H ...
Page 52: ...52 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H Ë Ë Ë Ë Ë AUDIO Unit 1 2 Display ...
Page 53: ...53 17 16 19 18 15 14 13 12 11 10 LC 37HV4M LC 37HV4H ...
Page 54: ...54 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H Ë Ë Ë Ë Ë AUDIO Unit 2 2 Display ...
Page 55: ...55 17 16 19 18 15 14 13 12 11 10 LC 37HV4M LC 37HV4H ...
Page 56: ...6 5 4 3 2 1 A B C D E F G H 56 LC 37HV4M LC 37HV4H Ë Ë Ë Ë Ë INVERTER 1 Unit Display ...
Page 57: ...57 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H Ë INVERTER 2 Unit Display ...
Page 58: ...6 5 4 3 2 1 A B C D E F G H 58 LC 37HV4M LC 37HV4H Ë Ë Ë Ë Ë INVERTER 3 Unit Display ...
Page 59: ...59 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H Ë INVERTER 4 Unit Display ...
Page 60: ...60 8 7 10 9 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H Ë Ë Ë Ë Ë Power Unit Display ...
Page 61: ...61 17 16 19 18 15 14 13 12 11 10 LC 37HV4M LC 37HV4H ...
Page 62: ...6 5 4 3 2 1 A B C D E F G H 62 LC 37HV4M LC 37HV4H Ë KEY Unit Display ...
Page 65: ...65 17 16 19 18 15 14 13 12 11 10 LC 37HV4M LC 37HV4H ...
Page 69: ...69 17 16 19 18 15 14 13 12 11 10 LC 37HV4M LC 37HV4H ...
Page 73: ...73 17 16 19 18 15 14 13 12 11 10 LC 37HV4M LC 37HV4H ...
Page 85: ...85 6 5 4 3 2 1 A B C D E F G H LC 37HV4M LC 37HV4H Ë Ë Ë Ë Ë Display POWER Unit Wiring Side ...
