Component Test; Door Locking Motor; Micro Switch - LG LDE3031ST Service Manual

Before testing any of components, perform the following checks:
NOTE:
1. The most common cause for control failure is corrosion on connectors.
Therefore, disconnecting and reconnecting wires will be necessary throughout test procedures
2. ALL units in the first few days of use should be checked for mis-wiring or loose connections
1. All/tests/checks should be made with a VOM or DVM having a sensitivity of 20,000 ohms per-volt DC, or
greater.
2. Check all connections before replacing components, looking for broken or loose wires, Failed terminals, or
wires not pressed into connectors far enough.
3. Resistance checks must be made with power cord unplugged from outlet, and with wiring harness or
connectors disconnected.
• Disconnect power supply cord from the outlet before servicing
• Replace all panels and parts before operating
• Reconnect all grounding devices after servicing
- Failure to do so can result in death or electrical shock
NOTE: Below Ω value were tested at room temperature (77F/25°C)
Components

Door locking Motor

Micro Switch

COMPONENT TEST

WARNING
Test procedures
1. Refer to page 3-12 for the servicing procedure
2. Measure the resistance
(Multiple meter scale: R x 1000)
ON position (Unlock position)
Normal
: below 2Ω
NOTE: The Micro switch will be held for 13 seconds during lock or unlock.
OFF position (Lock position)
4-1
Results
Normal: Approximately
2.6 kΩ ± 10%
If not replace
Abnormal: Infinite(open)
below 5Ω (shorted)
Normal
: Infinite