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Änderungen an Schritt Nr. 6

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[* black] There are three or five relays on the circuit board. K6 is an OMRON G5LE-1-VD, 12 VDC, and rated to switch 10A at 250 VAC. K1 and K4 are both OMRON G2RL-1A-E, 12VDC, and rated to switch 16A at 250 VAC.
[* black] K1 controls the door lock solenoid. I found the contacts on it were blackened due to arcing. I didn't bother to find out what the other two relays do, but I cleaned them all anyway. Another repairer says that only K1 & K4 were inspected; K1 had significant contanimation & K4 LQQKed new by comparison. Treated K1 only with all problems resolved!
[* black] There are three or five relays on the circuit board. K6 is an OMRON G5LE-1-VD, 12 VDC, and rated to switch 10A at 250 VAC. K1 and K4 are both OMRON G2RL-1A-E, 12VDC, and rated to switch 16A at 250 VAC.
[* black] K1 controls the door lock solenoid. I found the contacts on it were blackened due to arcing. I didn't bother to find out what the other two relays do, but I cleaned them all anyway. Another repairer says that only K1 & K4 were inspected; K1 had significant contanimation & K4 LQQKed new by comparison. Treated K1 only with all problems resolved!
[* black] Unsolder one relay at a time from the circuit board, clean or replace it, then solder it back in position.
[* black] To unsolder a relay, start by heating the solder at one end of the relay, and gently pull the relay's plastic package with a finger on the hand holding the circuit board. Use solder wick to remove excess solder. After making progress at one end, switch to desoldering the contacts at the other end of the relay in the same fashion.
[* black] It may take several back and forth heating and desoldering cycles before the relay is free. You need patience. Don't try to melt all the solder at once, and don't overheat any one pin for a long period of time.
[*
black] To clean a relay, open its plastic case. DressBlow out the dust and grit. Dress the relay contacts with a small piece of folded-in-half 4002000-400 grit sandpaper. Blow out the dust and grit. Replacesandpaper, treated with contact cleaner. Replace the plastic case on the relay.
[* black] It may take several back and forth heating and desoldering cycles before the relay is free. You need patience. Don't try to melt all the solder at once, and don't overheat any one pin for a long period of time.
[*
black] To clean a relay, open its plastic case. DressBlow out the dust and grit. Dress the relay contacts with a small piece of folded-in-half 4002000-400 grit sandpaper. Blow out the dust and grit. Replacesandpaper, treated with contact cleaner. Replace the plastic case on the relay.
[* black] Solder the relay back onto the circuit board, and repeat with the next relay until all relays are cleaned and/or replaced.

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