Samsung Electronics
5. Alignment and Adjustments
5-1 High Voltage Transformer
5-2 Low Voltage Transformer
5-3 Magnetron
5-1
1. Remove connectors from the transformer terminals
and check continuity.
2. Normal resistance readings are as follows:
(Room temperature = 20ûC)
1. Continuity checks can indicate only an open
filament or a shorted magnetron. To diagnose an
open filament or shorted magnetron :
2. Isolate the magnetron from the circuit by
disconnecting its leads.
3. A continuity check across the magnetron filament
terminals should indicate one ohm or less.
4. A continuity check between each filament terminal
and magnetron case should read open.
1. The low voltage transformer is located on the
control circuit board.
2. Remove the low voltage transformer from the
PCB Ass'y and check continuity.
3. Normal resistor reading is shown in the table.
PRECAUTION
1. High voltage is present at the high voltage terminals during any cook cycle.
2. It is neither necessary nor advisable to attempt measurement of the high voltage.
3. Before touching any oven components or wiring, always unplug the oven from its power source and discharge the high voltage
capacitor.
Filament Terminals
Secondary
Terminal
Primary
Terminals
MODEL
SHV-557UC1
Secondary
90
Ω
±
10%
Filament
Shows Continuity
Primary
0.40
Ω
±
10%
Resistance
DN-5574W
CE-5574W
1~2(Input)
312.3
Ω
286.5
Ω
4~5(Output17V)
11.22
Ω
9.245
Ω
7~8(Output2.7V)
2.213
Ω
1.735
Ω
Cooling Fins
Gasket Plate
Magnetron Antenna
Terminals
