Sharp FO IS125N - B/W Laser - All-in-One Service Manual page 109

2.4. Power section
The Control PWB requires multi voltage (+3.3V, +5V, +24V, +24VH).
V4D, +24V and +24VH are supplied from the power supply unit.
+3.3V are generated by the regulator (IC900) on the Control PWB.
INT5V is generated by regulator (IC302) on the Control PWB, is the
exclusive use as interlocking power for Optical unit (LSU).
Its structure is as shown below.
Power Supply
Unit
+24VH(*)
+24V (**)
Ach
Control PWB
KIA7805API/P (IC302)
TA48033BF (IC900)
(*) Supplied always regardless of door open/close.
(**) Supplied only when door is close.
Fig. 5
5 – 18
FO-IS125N
+24VH
+24V
+5V
+3.3V