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Model
SA-PM250EB SA-PM250EC SA-PM250EE SA-PM250EF SA-PM250EG (serv.man2)
Pages
74
Size
4.05 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / CD STEREO SYSTEM
File
sa-pm250eb-sa-pm250ec-sa-pm250ee-sa-pm250ef-sa-pm2.pdf
Date

Panasonic SA-PM250EB / SA-PM250EC / SA-PM250EE / SA-PM250EF / SA-PM250EG (serv.man2) Service Manual ▷ View online

5
1.6.
Safety Part Information
Safety Parts List:
There are special components used in this equipment which are important for safety.
These parts are marked by   in the Schematic Diagrams, Exploded View & Replacement Parts List. It is essential that these
critical parts should be replaced with manufacturer’s specified parts to prevent shock, fire or other hazards. Do not modify the
original design without permission of manufacturer.
Safety
Ref. No.
Part No.
Part Name & Description
Remarks
23
RGN3453-K
NAME PLATE
EC/EB/EF/EG
23
RGN3453A-K
NAME PLATE
EE
29
RMV0442
SMPS COVER SHEET
301
RAE1028Z-V
TRAVERSE UNIT
A2
K2CQ2YY00119
AC CORD
EC/EE/EF/EG
A2
K2CT2YY00097
AC CORD
EB
A3
RQT9926-B
O/I BOOK (En)
EB/EC
A3
RQT9927-D
O/I BOOK (Fge/Fr/It/Du)
EG
A3
RQT9928-H
O/I BOOK (Fr)
EF
A3
RQT9929-E
O/I BOOK (Sw/Da/Sp/Cz/Po/Fi)
EC
A3
RQT9930-1R
O/I BOOK (Ru/Ur)
EE
PCB5
REP5070AA
SMPS P.C.B.
(RTL)
Z1752
D4EAY511A182
VARISTOR
L1702
G0B922G00002
LINE FILTER
T1700
G4DYZ0000077
TRANSFORMER
PC1702
B3PBA0000579
PHOTO COUPLER
F1700
K5G202Y00006
FUSE
P1751
K2AA2B000011
AC INLET
R1724
ERJ12YJ105U
1M     1/2W
R1726
ERJ12YJ105U
1M     1/2W
C1702
F0CAF224A105
0.22uF
C1710
F1BAF471A013
470pF
C1725
F0CAF104A105
0.1uF
C1727
F1BAF1020020
1000pF
C1728
F1BAF1020020
1000pF
6
2 Warning
2.1.
Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensi-
tive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec-
trostatically Sensitive (ES) Devices.
The following techniques should be used to help reduce the incidence of component damage caused by electrostatic discharge
(ESD).
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as alumi-
num foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static (ESD protected)” can
generate electrical charge sufficient to damage ES devices.
5. Do not use freon-propelled chemicals.   These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or compara-
ble conductive material).
7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.
CAUTION: 
Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise harmless motion such as the
brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) suf-
ficient to damage an ES device).
7
2.2.
Precaution of Laser Diode
Caution:
This product utilizes a laser diode with the unit turned "on", invisible laser radiation is emitted from the pickup lens.
Wavelength: 790 nm (CD)
Maximum output radiation power from pickup: 100 
μW/VDE
Laser radiation from the pickup unit is safety level, but be sure the followings: 
1. Do not disassemble the pickup unit, since radiation from exposed laser diode is dangerous. 
2. Do not adjust the variable resistor on the pickup unit. It was already adjusted.
3. Do not look at the focus lens using optical instruments.
4. Recommend not to look at pickup lens for a long time.
ACHTUNG :
Dieses Produkt enthält eine Laserdiode. Im eingeschalteten Zustand wird unsichtbare Laserstrahlung von der Lasereinheitadg-
estrahit.
Wellenlänge : 790nm (CD)
Maximale Strahlungsleistung der Lasereinheit :100 
μW/VDE
Die Strahlung an der Lasereinheit ist ungefährlich, wenn folgende Punkte beachtet werden:
1. Die Lasereinheit nicht zerlegen, da die Strahlung an der freigelegten Laserdiode gefährlich ist.
2. Den werkseitig justierten Einstellregler der Lasereinhit nicht verstellen.
3. Nicht mit optischen Instrumenten in die Fokussierlinse blicken.
4. Nicht über längere Zeit in die Fokussierlinse blicken.
CAUTION!
THIS PRODUCT UTILIZES A LASER.
USE OF CONTROLS OR ADJUSTMENTS OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT
IN HAZARDOUS RADIATION EXPOSURE.
8
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)
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