2GM
2-3-9
(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.
GND
PGND
1
2
3
2
3
1
Q16
R109 R110 R111
ERASER
+24V3
YC14
ERASPW
Eraser lamp
PDL15/AD15
86
CPU
U1
ERASER
Engine PWB
Eraser lamp cotrol circuit
Figure 2-3-5 Eraser lamp control circuit
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