1 GENERAL PRECAUTIONS
1.1.
Safety Precautions
1. Before servicing, unplug the power cord to prevent electrical shock hazard.
2. When replacing parts, user only manufacture’s recommended components for safety.
3. Check the condition of power cord. Replace if wear or damage is evident.
4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
5. Before returning the serviced equipment to the customer, perform the following electrical tests to prevent shock hazard.
1.2.
Electrical Tests
1. Unplug the power cord and check for continuity between the earth ground connection on the plug and the metal cabinet. There
should be zero ohm resistance found.
2. With the unit unplugged, short the AC Live-Neutral of the plug with a jumper wire.
3. Turn ON the power switch.
4. Measure the resistance value with an ohmmeter between the jumpered AC plug and each exposed metal cabinet part, such as
screwheads, etc.
Note
Some exposed parts may be isolated from the chassis by design. They read infinity.
5. If the measurement is less than 1M
, a possibility for electric shock may exit.
Note
This hazardous condition must be corrected before the unit is returned to the end user.
1.3.
For Service Technicians
ICs and LSIs are vulnerable to static electricity.
When repairing, the following precautions will help to prevent recurring malfunctions.
1. Cover the plastic parts with aluminum foil.
2. Ground the soldering irons.
3. Use a conductive mat on the worktable.
4. Do not grasp IC or LSI pins with bare fingers.
3
KV-S2025C Series / KV-SU225C Series / KV-S2045C Series / KV-SU245C Series
Summary of Contents for KV-S2025C
Page 96: ...96 KV S2025C Series KV SU225C Series KV S2045C Series KV SU245C Series ...
Page 114: ...KV S2025C Series KV SU225C Series KV S2045C Series KV SU245C Series 114 ...
Page 116: ...14 1 Exterior 116 KV S2025C Series KV SU225C Series KV S2045C Series KV SU245C Series ...
Page 118: ...14 2 Chassis and Base 118 KV S2025C Series KV SU225C Series KV S2045C Series KV SU245C Series ...
Page 120: ...14 3 Hopper Unit 120 KV S2025C Series KV SU225C Series KV S2045C Series KV SU245C Series ...
Page 122: ...14 4 Power Unit 122 KV S2025C Series KV SU225C Series KV S2045C Series KV SU245C Series ...