Panasonic SA-VK460GS, Руководство по обслуживанию

Страница: 8 / 125

Note :
When the protection circuitry functions, the unit will not operate unless the power is first turned off and then on again.
1.6. Safety Parts 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 & 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.
Table 1
Reference No. Part No. Part name & Description Remarks
360 RAE2023Z-S TRAVERSE UNIT
S5950 K0AABLB000003 SW VOLTAGE SELECTOR GS/GCS/GCT
L5950 ELF15N035AN LINE FILTER
T5950 G4CYBYY00013 MAIN TRANSFORMER
T5951 G4C2AAJ00005 SUB TRANSFORMER
Z5950 ERZV10V511CS ZENER
RL5950 K6B1AEA00015 POWER RELAY
F1 K5D122BLA014 FUSE GC
F1 K5D252BLA013 FUSE GS/GCS/GCT
F2 K5D122BLA014 FUSE GS/GCS/GCT
FP5100 K5G401A00008 FUSE PROTECTOR
FP5950 K5G402A00025 FUSE PROTECTOR
JK5950 K2AA2B000011 AC INLET
A2 K2CQ2CA00007 AC CORD GC/GCS/GS
A2 K2CT3CA00004 AC CORD GS
A2 K2CP2YY00001 AC CORD GCT
2 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by electricity. Such components commonly are called
Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and
semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage
caused by electro static 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
aluminium foil, to prevent electrostatic charge build up 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 remover device. Some solder removal devices not classified as “anti-static (ESD protected)” can
generate electrical charge 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, aluminium foil or
comparable 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 body 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) sufficient to
damage an ES device).
8
SA-VK460GC / SA-VK460GS / SA-VK460GCS / SA-VK460GCT