Samsung CM1319 Service Manual page 40

9-2 Description of Operating Sequence (continued)
High Voltage Transformer input power sensing circuitry
Refers to the circuitry that detects and check if the input power is correctly supplied to the primary
terminal of High Voltage Transformer when the microwave oven is operating. If any abnormal
condition(eg. Micro S/W, Relay open) is detected, the error code (E41, E42) shows on the display
window. When the error code appears in the display window, check the waveform(A), (B), (C),or (D).
In case of Power Relay 1 (RY2), check the waveform (A), (B) below.
in case of Power Relay 2 (RY5), check the waveform (C), (D) below.
Waveform(C}
MICOM Waveform(D) ay
R40(24) Raa
4K
Ic4 pc-817 {I pat
a
1N4007
R37
LO| CNB
8)
10K 10K
Ole
IC5 PC-817 R40 R48 5
\W —\\\--—@ &
1 oO
10K 10K : s
MICOM
LO] *
R41(25) je 1K 2 _D2e
4N4007 ©
Waveform(A) R36 U_)
10K Waveform(B)
Waveform
(B)or(D)
5Vz>—
Waveform
(Ajort
Cc)
ov+——
~ 38 -