AR-651 (serv.man10). Scanning section - Sharp Copying Equipment Service Manual (repair manual). Page 8

AR-651/810  SCANNING SECTION  6 - 8

External electrode type Xenon fluorescent lamp is used as an exposure lamp in this copier.

(1) Structure

The fluorescer is applied to the in-

side surface of the lamp pipe (ex-

cept for a part which serves as an

opening) which is filled with the Xe-

non gas.

A pair of the external electrodes

covered by film with adhesive agent

is attached around the pipe.

(2) Behavior inside the lamp

The electron inside the pipe is led

to the electric field by applying volt-

age to the pair of the external elec-

trodes, and the discharge is started.

The electrons then flow and clash

with the Xenon atoms inside the pipe

to excite them and allow them to

generate ultraviolet rays. This ultra-

violet rays convert the fluorescer into

visible light.

(1)Electrode (2)Electron (3)Xenon atom (4)Ultraviolet ray (5)Fluorescer
(6)Visible light (irradiated from the opening to outside the pipe)
(7)Opening (8)Harness

PET film

Aluminum tape
electrode

Adhesive agent

Glass valve

Fluorescer

Xenon gas

(1)

(6)

(8)

(7)

(5)

(2)

(4)

(3)