Menumaster Jetwave JET19 Series, Service Training Manual

Page: 54 / 67

DIODE TESTING 2
MANY VOLT/OHM METERS (DIGITAL OR ANALOG) IN USE TODAY CANNOT READ THE VERY HIGH RESISTANCE
ACROSS THE DIODE. METER NEEDS A MINIMUM OF 6 VOLTS OUTPUT ON OHMS SCALE. THE RESULT IS MANY
DIODES ARE IMPROPERLY DIAGNOSED. IF THE METER BEING USED DOES NOT HAVE THE REQUIRED VOLTAGE,
A 9VDC BATTERY CAN BE USED TO ASSIST IN PROPER DIAGNOSIS.
METER SET TO READ DC VOLTS
– 9VDC Minimum
CONNECT THE
POSITIVE TERMINAL
OF THE BATTERY TO
THE SPADE
TERMINAL OF THE
DIODE AND THE
NEGATIVE BATTERY
TERMINAL TO THE
COMMON (BLACK)
METER LEAD.
CONNECT THE RING
TERMINAL OF THE
DIODE TO THE RED
METER LEAD.
REVERSE THE DIODE
SO THE RING
TERMINAL IS NOW
ON THE BATTERY
AND THE SPADE
TERMINAL IS
ATTACHED TO THE
RED METER LEAD.
RESULT = 0vdc RESULT = Battery Voltage
ALWAYS DISCHARGE CAPACITOR BEFORE HANDLING !