LG LRSC21935xx, Service Manual

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1-2. Oscillation circuit
Oscillation circuit is a circuit with the purpose of generating basic time for clock occurrence for synchronization and time
calculation in relation with information transmission/reception of inside elements of IC1 (MICOM). The OSC1 must always
use rated parts since if SPEC is changed, time calculated at the IC1 may be changed or no operation is done.
1-3. Reset circuit
The reset circuit is circuit allowing various parts such as RAM inside of MICOM (IC1) to initialize and the whole of function to
start from the initial status, when initial power is input or when power is applied again to MICOM by a spontaneous power
failure. ‘LOW’ voltage is applied to the reset terminal of MICOM in the beginning of power supply for a constant time (10ms).
Reset terminal during general operation is 5V (No MICOM operates in failure of RESET IC).
EXPLATION FOR MICOM CIRCUIT
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<GR-P257, L257, P217, L217> <GR-C257, B257, C217, B217>
<GR-P257, L257, P217, L217> <GR-C257, B257, C217, B217>