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FAULT FINDING
SECTION 100-816-500
MARCH 1993
-3-
FIGURE 3
KPSU16 DC VOLTAGE TEST
FIGURE 2
QPSU8 DC VOLTAGE TEST
AC DC
DC POWER
–24 VOLT
CIRCUIT BREAKER
DC OUT (P9)
CONNECTOR
(VOLTAGE
TEST POINTS)
BATT
±
PULL
LOCK
PUSH
UNLOCK
RESERVE
BATTERY
CONNECTOR
FOR PBTC CABLE
DK16 BASE UNIT
MOTHERBOARD
(FG) SCREW
GREEN/YELLOW: 0V
BLACK: 0V
YELLOW: –26.3V ~ –27.8V
RED: +4.5 ~ +5.5
BLUE: –4.5 ~ –5.5
GREEN: 0V
DK16 KSU
KPSU 16A POWER SUPPLY
WARNING
Hazardous voltage inside !
If servicing required,
remove A.C. cord.
QMA
ROM
IC5
J16
SW1
ON OFF
J17
CONF
J18
CONF
J20
AC
DC
CN3
J19
42
F.G. SCREW FOR
THIRD WIRE GROUND
CONNECTION
QPSU8 POWER SUPPLY
POWER SUPPLY
MOUNTING SCREW
CN1, AC
POWER CORD
CONNECTOR
POWER SUPPLY
MOUNTING SCREW
RAM STORAGE BATTERY JUMPER PLUGRAM STORAGE
BATTERY
J20-CONNECTOR FOR QSMU
PCB INSTALLATION
CN4, BATTERY
CONNECTOR PLUG
BATTERY
CONNECTOR
FOR HPFB
DC POWER
ON/OFF SWITCH
AC AND DC
POWER
INDICATOR LEDs
F201, 3 AMP FUSE
POWER SUPPLY
MOUNTING SCREW
FG
CN4
IC5, PIN 42, +5V
TEST POINT (+4.5 ~ +5.5)
YELLOW WIRES:
+26.3V ~ +27,8V
GREEN WIRES:
(FG) OV
HPFB
GROUND WIRE