UP-3500 (serv.man29). UP3500 Hardware Service Manual - Sharp EPOS Service Manual (repair manual). Page 2

UP-3500 (V)  LEAD-FREE SOLDER

RISK OF EXPLOSION IF BATTERY IS REPLACED

BY AN INCORRECT TYPE.

DISPOSE OF USED BATTERIES ACCORDING

TO THE INSTRUCTIONS.

AVOID: SHORT-CIRCUITING THE BATTERY TERMINALS.

KEEP THE BATTERY AWAY FROM FIRE. 

* WHEN DISPOSING THE BATTERY, FOLLOW THE LOCAL 

RULES AND REGULATIONS. 

THIS PRODUCT CONTAINS NICKEL-METAL HYDRIDE BATTERY.

THIS BATTERY MUST BE DISPOSED OF PROPERLY.

REMOVE THE BATTERY FROM THE PRODUCT AND CONTACT FEDERAL OR 

STATE ENVIRONMENTAL AGENCIES FOR INFORMATION ON RECYCLING AND 

DISPOSAL OPTIONS.

■  LEAD-FREE SOLDER

The PWB’ s of this model employs lead-free solder. The “LF” marks indicated on the PWB’s and the Service Manual mean “Lead-Free” solder. The

alphabet following the LF mark shows the kind of lead-free solder. 

When repairing a lead-free solder PWB, use lead-free solder thread. Never use conventional lead solder thread, which may cause a breakdown or an accident. 

Since the melting point of lead-free solder thread is about 40°C higher than that of conventional lead solder thread, the use of the exclusive-use soldering iron is

recomended. 

Since the melting point of lead-free solder is about 220°C, which is about 40°C higher than that of conventional lead solder, and its soldering capacity is inferior to

conventional one, it is apt to keep the soldering iron in contact with the PWB for longer time. This may cause land separation or may exceed the heat-resistive tem-
perature of components. Use enough care to separate the soldering iron from the PWB when completion of soldering is confirmed.

Since lead-free solder includes a greater quantity of tin, the iron tip may corrode easily. Turn ON/OFF the soldering iron power frequently.  

If different-kind solder remains on the soldering iron tip, it is melted together with lead-free solder. To avoid this, clean the soldering iron tip after com-

pletion of soldering work. 

If the soldering iron tip is discolored black during soldering work, clean and file the tip with steel wool or a fine filer. 

■ BATTERY CAUTION

*

The installation of the battery (UBATM2369RCPA) is allowed only to the products and the units
which are specified in the Service Manual, the Parts Guide and the other service information.

Use a great care that if it would be charged or counter-charged with a large current over 250mA, it
may be exploded.

5mm

Lead-Free

Solder composition 
code (Refer to the 
table at the right.)

Solder composition

Sn-Ag-Cu

Sn-Ag-Bi
Sn-Ag-Bi-Cu

Sn-Zn-Bi

Sn-In-Ag-Bi

Sn-Cu-Ni

Sn-Ag-Sb

Bi-Sn-Ag-P
Bi-Sn-Ag

a

b

z

i

n

s

p

Solder composition code

a