Storz 201340 20, Service Manual

Page: 44 / 59

5.4 Testing and adjusting the lamp current (as from
serial no. LF0611983)
a. Disconnect the power cord from the light source.
b. Remove the outer cover by sliding the interlock slide to the right, removing the four screws on the
bottom of the case, and sliding the cover back.
c. Lift the lamp insulator and fold it back.
d. Reconnect the power cord and turn the device power on.
Caution: Do not look into the lamp or light cable. Do not allow light from either the light
source or the light-cable to shine directly on hands or other areas of the body;
burns may occur.
Caution: Lamps are high pressure vessels and must be handled with care. When
handling the lamp wear safety glasses and face shields to protect the face
and gloves to prevent skin oil transfer. Never touch the porcelain insulator on
the lamp with bare hands. When working with an operating lamp, wear eye
and face protection to prevent blindness or UV damage.
Caution: Connect the voltmeter only when the lamp is already started; otherwise, the
high-voltage starting pulse will damage or destroy the voltmeter. Do not
restart the device when making measurements.
e. Connect the DVM across the lamp. Measure and record the lamp voltage.
f. Lamp power (the product of current and voltage) should be around 300 W. Set the current probe to
10 mV/A, place current probe on lamp return (-) wire and adjust the lamp current to 0.19 V ( 앐 0.01) /
19 A or to a value that would result the 300 W power requirement. The current adjustment
potentiometer is R58 on the power supply.
g. Remove the DVM from the circuit and turn off the power.
h. Reassemble in reverse order of disassembly.
5.5 Focusing the lamp
a. The focus of the XENON NOVA
®
300 is fixed at the factory; no adjustment is necessary.
XENON NOVA
®
300
MODEL 20
1340 20
06.11 / V1.6
5-3