Test Procedures - Sharp R-1880LS Service Manual

R-1880LS/LST
PROCEDURE
LETTER
N NOISE FILTER TEST
1. Disconnect the power supply cord, and then remove outer case.
. Open the door and block it open.
3. Discharge high voltage capacitor.
4. Disconnect the leads to the primary of the power transformer.
5. Using an ohm-meter, check between the terminals as described in the following table:
MEASURING POINT
Between N and H
Between terminal N and GRY Short Circuit
Between terminal H and RED
If incorrect readings are obtained, replace the noise filter.
6. Reconnect all leads removed from components during testing.
7. Re-install the outer case (cabinet).
8. Reconnect the power supply cord after the outer case is installed.
9. Run the oven and check all functions.

TEST PROCEDURES

NOISE FILTER UNIT
NOISE SUPPRESSION COIL
LINE CROSS CAPACI-
TOR 0.22uF/ AC 250V
LINE BYPASS CAPACITOR
0.0033uF/ AC
125V
GRY
INDICATION OF OHM-METER
Open Circuit
3
COMPONENT TEST
MONITOR
FUSE
LINE BYPASS CAPACITOR
0.0033uF/ AC
125V
RED
Short Circuit