FAULT FINDING SECTION 100-816-500 MARCH 1993

IC5, PIN 42, +5V

TEST POINT (+4.5 ~ +5.5)

QPSU8 POWER SUPPLY

RAM STORAGE

 

RAM STORAGE BATTERY JUMPER PLUG

 

BATTERY

 

 

 

J20-CONNECTOR FOR QSMU

 

 

 

 

 

 

PCB INSTALLATION

 

 

 

 

 

 

 

 

 

 

 

POWER SUPPLY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MOUNTING SCREW

 

 

 

 

 

 

 

 

 

 

 

CN4, BATTERY

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CONNECTOR PLUG

POWER SUPPLY MOUNTING SCREW

F.G. SCREW FOR

THIRD WIRE GROUND

CONNECTION

HPFB

GROUND WIRE

CN1, AC

POWER CORD

CONNECTOR

POWER SUPPLY

MOUNTING SCREW J17 CONF

WARNING

!

required,servicingIf

cord.A.C.remove

 

 

 

 

voltageHazardousinside

 

 

CN4

 

 

 

 

 

 

 

 

 

 

 

 

 

AC

 

 

 

 

 

 

CN3

DC

 

 

 

 

 

 

 

 

 

 

 

 

ON OFF

 

FG

 

 

 

 

 

 

 

 

 

 

 

42

SW1

J19

J18

CONF

J16

QMA

 

J20

 

ROM

 

 

 

 

 

 

 

 

 

 

 

 

 

IC5

 

 

BATTERY

CONNECTOR

FOR HPFB

DC POWER

ON/OFF SWITCH

AC AND DC

POWER

INDICATOR LEDs

F201, 3 AMP FUSE

YELLOW WIRES: +26.3V ~ +27,8V

GREEN WIRES: (FG) OV

FIGURE 2

QPSU8 DC VOLTAGE TEST

DK16 KSU

KPSU 16A POWER SUPPLY

PULL

LOCK

PUSH

UNLOCK

(FG) SCREW

DK16 BASE UNIT

MOTHERBOARD

DC OUT (P9) CONNECTOR (VOLTAGE TEST POINTS)

 

BATT

RESERVE

 

±

 

BATTERY

 

 

 

 

CONNECTOR

AC

DC

FOR PBTC CABLE

 

DC POWER

–24 VOLT CIRCUIT BREAKER

GREEN/YELLOW: 0V

BLACK: 0V

YELLOW: –26.3V ~ –27.8V

RED: +4.5 ~ +5.5

BLUE: –4.5 ~ –5.5

GREEN: 0V

FIGURE 3

KPSU16 DC VOLTAGE TEST

-3-

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Toshiba DK8, DK 16 manual QPSU8 DC Voltage Test, KPSU16 DC Voltage Test, Fault Finding -816-500 March