Power Supply Removal And Replacement; Power Supply Removal - Toshiba DK14 Installation And Maintenance Manual

CO
Line
PFT
Standard
Telephone
Figure 3-13 Base KSU Power Failure Transfer (PFT) Circuit Diagram

Power Supply Removal and Replacement

The power supply (TPSU16A) comes factory-installed in the Base KSU; if necessary, it can be
removed and replaced.

Power Supply Removal

1. Make sure that the power supply switch is Off and that the AC power cable is not plugged into
an outlet. Confirm that the green AC LED is not lit (see
1643
Figure 3-14 Power Supply (TPSU16A)
Strata DK I&M 5/00
MDF TCOU
2
T
3
R
4
5
MOD Jack CO1
(Base KSU)
MDF
R
T
MOD Jack PF1
(Base KSU)
3
2
FG4
FG
1
-24V
-24V
FG2
8 7
Power Supply Removal and Replacement
Power Available
Connection
TCOU
CO Line 1
Power Fail
Connection
Figure 3-14).
4
POWER SUPPLY ASSEMBLY
TPSU16A
MODEL
INPUT: AC127V 2.2A 60 HZ
OUTPUT: -27.3V 2.8A. -27.3V 0.2A AC DC
V. 1A 1996-05 00001
TOSHIBA CORPORATION
DC POWER
MADE IN
WARNING
Hazardous voltage inside!
If servicing required
remove A. C. plug.
FG1
6
DK40i Installation
2155
5
3-19