DOWNLOAD Panasonic SA-BTX70EB / SA-BTX70EG / SA-BTX68EF Service Manual ↓ Size: 10.33 MB | Pages: 127 in PDF or view online for FREE

Model
SA-BTX70EB SA-BTX70EG SA-BTX68EF
Pages
127
Size
10.33 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / BLU-RAY DISC HOME THEATER SOUND SYSTEM
File
sa-btx70eb-sa-btx70eg-sa-btx68ef.pdf
Date

Panasonic SA-BTX70EB / SA-BTX70EG / SA-BTX68EF Service Manual ▷ View online

9
2.3.
Service caution based on Legal restrictions
2.3.1.
General description about Lead Free Solder (PbF)
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.
Definition of PCB Lead Free Solder being used
Service caution for repair work using Lead Free Solder (PbF)
• 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).
Recommended Lead Free Solder (Service Parts Route.)
• The following 3 types of lead free solder are available through the service parts route.
RFKZ03D01K-----------(0.3mm 100g Reel)
RFKZ06D01K-----------(0.6mm 100g Reel)
RFKZ10D01K-----------(1.0mm 100g Reel)
Note
* 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
2.4.
Handling Precautions for Traverse Unit
The laser diode in the optical pickup unit may break down due to static electricity of clothes or human body. Special care must be
taken avoid caution to electrostatic breakdown when servicing and handling the laser diode in the traverse unit.
2.4.1.
Cautions to Be Taken in Handling the Optical Pickup Unit
The laser diode in the optical pickup unit may be damaged due to electrostatic discharge generating from clothes or human body.
Special care must be taken avoid caution to electrostatic discharge damage when servicing the laser diode.
1. Do not give a considerable shock to the optical pickup unit as it has an extremely high-precise structure.
2. To prevent the laser diode from the electrostatic discharge damage, the flexible cable of the optical pickup unit removed
should be short-circuited with a short pin or a clip.
3. The flexible cable may be cut off if an excessive force is applied to it. Use caution when handling the flexible cable.
4. The antistatic FPC is connected to the new optical pickup unit. After replacing the optical pickup unit and connecting the flexi-
ble cable, cut off the antistatic FPC.
Figure 1
2.4.2.
Grounding for electrostatic breakdown prevention
Some devices such as the DVD player use the optical pickup (laser diode) and the optical pickup will be damaged by static electric-
ity in the working environment. Proceed servicing works under the working environment where grounding works is completed.
2.4.2.1.
Worktable grounding
1. Put a conductive material (sheet) or iron sheet on the area where the optical pickup is placed, and ground the sheet.
11
2.4.2.2.
Human body grounding
1. Use the anti-static wrist strap to discharge the static electricity form your body.
Figure 2
12
3 Service Navigation
3.1.
Service Information
This service manual contains technical information which will allow service personnel’s to understand and service this model.
Please place orders using the parts list and not the drawing reference numbers.
If the circuit is changed or modified, this information will be followed by supplement service manual to be filed with the original ser-
vice manual.
 BD Drive Digital P.C.B Assembly:
1) This service manual does not contain the following information, because of the impossibility of servicing at
     component level.
    - Exploded View and Parts List for individual parts of BD Mechanism.
2) The following category are recycle module part. Please send them to Central Repair Center.
 
   - BD Mechanism/Digital P.C.B. Assembly (BTX70EB: RFKNBTX70EB) 
                                                    (BTX70EG: RFKNBTX70EG)
                                                    (BTX68EF: RFKNBTX68EF)
• Micro-processor & EEPROM IC:
1) The following components are assembled part (with download firmware or device keys).
      - Micro-processor IC, IC100 (BTX70EB: RFKWMBTX70EB)
                                                   (BTX70EG: RFKWMBTX70EG)
                                                   (BTX68EF: RFKWMBTX68EF)
      - EEPROM IC, IC105 (BTX70EB: RFKWMBTX70EB)
                                          (BTX70EG: RFKWMBTX70EG)
                                          (BTX68EF: RFKWMBTX68EF)
                                         
• Speaker system
1) For information, please refer to original service manual as follow:- 
      a) SB-BTX70EG-K (Order No. PSG0905005CE) - For SA-BTX70EB/EG 
      b) SB-BTX68EF-K (Order No. PSG0905031CE) - For SA-BTX68EF 
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