Lvps - Toshiba e-STUDIO170F Service Manual

7.6

LVPS

This section describes the functions of each circuit on the LVPS.
LVPS
LIVE
AC120V/
AC220-240V
NEUTRAL
LIVE
2
Fuser
NEUTRAL
1
The LVPS consists of the transformer, regulator, photo-coupler, and other peripheral devices.
It delivers each stable power supply (+24V, ±12V, +5V) to the entire system. The power unit is con-
nected to CN17 on the Main PBA.
e-STUDIO170F Circuit Description
Noise filter
circuit
Power supply voltage
Heater
drive Stabilizing circuit
circuit
Fig.7-51
7 - 70
generation circuit
Overvoltage protection
circuit
C/O-IN
1
Front cover
2
open switch
+24VILS
10,11
+24V
14
+12V
2
-12V
3
+5VPS
6
+5V
7
PG
12,13,15
AG
4
SG
5
PSC
1
Main PBA
HTON1X
8
HTON2X
9
January 2005 © TOSHIBA TEC