Eraser Lamp Control Circuit - Kyocera KM-1820 Service Manual

(1) Eraser lamp control circuit

The CPU (U1) turns pin #86 (ERASER) of U1 to H level, transistors (Q18) turns on consequently, and the 24 V DC given at
pin #1 of connector YC14 applies to the eraser lamps. The eraser lamps thus illuminate as the current flows through the
eraser lamp, the pin #2 of connector YC14, resistors (R109, R110, and R111), transistor Q18 and the ground.
CPU
U1
PDL15/AD15
Engine PWB
Eraser lamp cotrol circuit
ERASER
86
Figure 2-3-5 Eraser lamp control circuit
+24V3
3
R109 R110 R111
2
Q16
1
GND
Eraser lamp
YC14
ERASPW
1
2 ERASER
3
PGND
2GM
2-3-9