Servicing; Post-Repair Inspection - Sharp KS-COM18 Service Manual

Remember the following points.
1. Precautions for handling electronic parts
(1) Stock/transportation
PCB ass'y must be wrapped with aluminium foil or put in electroconductive bag at the condition of
full discharge.
(2) Taking out/fitting
Do not place anything loaded by electrostaticity nearby.
2. Tools for servicing
(1) Soldering iron
Use one 30 W or less (with temperature controllable).
Use one fitted with a ceramic heater.
(2) Tester
Use one with its inside resistance more than 20 ohm/V.
Digital tester is preferred.
3. Precautions for servicing
In replacing parts, be sure to use the designated parts.
After repair be sure to confirm the place each part is attached to and see the soldered conditions (ensure
against "whisker", under-soldering, over-soldering, tunnel etc.).
As to tab terminals, be sure to solder after lead clinching.
1. Reconfirmation of work done and inspection
(1) Is anything left carelessly (such as screw, spacer) ?
(2) Is there no mis-wiring ?
(3) For final inspection and operation check (Refer to page 19) Are key operation and display corrected ?
2. Insulation performance
(1) Insulation resistance test ;
Required to be more than 1 megaohm when measured by an insulation resistance 500V d.c. megger
(This test to be done before and immediately after the temperature test).
(2) Withstand voltage test ;
No beak down at 1500 V a.c. for 1 min. (To be done after the insulation resistance measurement which
is to be done immediately after the temperature test.) Points to be measured: Between one end of
combined plug blades and lid cover assembly or heater plate.
3. Temperature test
Confirm performance by the [Cooking / Warming test method.]

SERVICING

POST-REPAIR INSPECTION

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