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9

The lead free solder has been used in the mounting process of all electrical components on the printed circuit boards used for this
equipment in considering the globally environmental conservation.  

The normal solder is the alloy of tin (Sn) and lead (Pb). On the other hand, the lead free solder is the alloy mainly consists of tin
(Sn), silver (Ag) and Copper (Cu), and the melting point of the lead free solder is higher approx.30 degrees C (86 F) more than that
of the normal solder.

- The lead free solder has to be used when repairing the equipment for which the lead free solder is used.(Definition: The letter
of "PbF" is printed on the PCB using the lead free solder.)
- To put lead free solder, it should be well molten and mixed with the original lead free solder.
- Remove the remaining lead free solder on the PCB cleanly for soldering of the new IC.
- Since the melting point of the lead free solder is higher than that of the normal lead solder, it takes the longer time to melt the
lead free solder.
- Use the soldering iron (more than 70W) equipped with the temperature control after setting the temperature at 350+-30
degrees C (662+-86 F).

- The following 3 types of lead free solder are available through the service parts route.
   RFKZ03D01KS-----------(0.3mm 100g Reel)
   RFKZ06D01KS-----------(0.6mm 100g Reel)
   RFKZ10D01KS-----------(1.0mm 100g Reel)

* Ingredient: tin (Sn) 96.5%, silver (Ag) 3.0%, Copper (Cu) 0.5%, Cobalt (Co) / Germanium (Ge) 0.1 to 0.3%

The letter of “PbF” is printed either foil side or components side on the PCB
using the lead free solder. (See right figure)

10

The laser diode in the optical pickup may break down due to
potential difference caused by static electricity of clothes or
human body.
So be careful of electrostatic break down during repair of the
optical pickup.

1. Do not subject the optical pickup to static electricity as it is

extremely sensitive to electrical shock.

2. To prevent the breakdown of the laser diode, an antistatic

shorting pin is inserted into the flexible board (FPC
Board).
When removing or connecting the short pin, finish the job
in as short times as possible.

3. Be careful not to apply excessive stress to the flexible

board (FPC Board).

4. Do not turn the variable resistor (Laser power adjust-

ment).

It has already been adjusted.

1. Human body grounding 

Use the antistatic wrist strap to discharge the static elec-
tricity from your body.

2. Work table grounding

Put a conductive material (sheet) or steel sheet on the
area where the optical pickup is placed and ground the
sheet.
Caution

The static electricity of your clothes will not be
grounded through the wrist strap. So take care not to
let your clothes touch the optical pickup.

11

12

“Caution to be taken when disassembling and reassembling the unit”

• Disconnect the flexible cable from the main P.C.B. before disassembling the monitor assembly.
• Do not apply undue force on the flexible cable. There is a danger of breaking the cable.
• Do not touch the terminals of the flexible cable with your bare hands.
• Disassembly and reassembly should be performed in the specified order.
• Hold the LCD panel by its edges.
• Do not press the LCD panel strongly.

* If the LCD panel was pressed strongly by chance during disassembly or reassembly, leave it for about 10 seconds before ener-
gizing the panel.

• To clean the LCD panel, wipe with a soft colth, such as gauze, saturated with isopropyl alcohol.

* Do not wipe the LCD panel with a dry gauze.
* Never use water for cleaning the LCD panel.
* Never use the following solvents:
(ketone: acetone and others)
(aromatic compounds: xylene, toluene)
(halogenides)

* If the water splashes on the LCD panel, wipe it away immediately.