SORENSEN DCS SERIES MANUAL MAINTENANCE
4-3
CHECK
CB1, F1, CR35 AND
INPUT VOLTAGE SELECTOR (P1)
CHECK
CR35, C32(A,B,C), C72(A,B,C)
WITH A VOLTMETER
(DC VOLTS)
CHECK OUTPUT VOLTAGE
CHECK FUSE F2
PANEL DISPLAYS
VISUALLY CHECK FRONT
CHECK FUSE F3
(APPROX 360VDC)
DC AT F3
CHECK FOR HIGH VOLTAGE
U9-11, CR1
CHECK
PANEL DISPLAYS
VISUALLY CHECK FRONT
CHECK
RIBBON CABLE J1 BETWEEN A1 AND A2
U1, U2, DS1-8 ON A1 ASSY
P1-5 FOR 6.2VDC REFERENCE
(P1) FOR CORRECT VOLTAGE
AND REPLACE F2 FUSE
CHECK INPUT VOLTAGE SELECTOR
Q13-16, C69, R111-113
BEFORE REPLACING FUSE
CHECK
SETUP
TURN THE POWER SWITCH OFF
DISCONNECT THE UNIT FROM THE AC SOURCE
DICCONNECT THE LOAD FROM THE OUTPUT TERMINALS
DISCONNECT ANY PROGRAMMING OR MONITOR LINES
CONFIGURE SWITCH SW1 AND CONNECTOR J3 FOR LOCAL CONTROL
(SEE DIAGRAMS AT LEFT AND RIGHT FOR SETTINGS AND CONNECTIONS)
SET VOLTAGE AND CURRENT CONTROLS FULLY CLOCKWISE
CONNECT THE UNIT TO THE AC SOURCE THROUGH AN ISOLATION TRANSFORMER
TURN UNIT ON
UNIT OK
CONNECTIONS AND CIRCUITS
FOR ERRORS
RECHECK LOAD AND PROGRAMMING
AUX SUPPLIES
F3 BLOWN
F2 BLOWN
NOT OK
AUX SUPPLIES
OK
HIGH VOLTAGE DC
OK
TEST OK
DESCRIBED IN SECTION 2.4
PERFORM FUNCTION TEST AS
F3 OK
DISPLAYS OK
F2 OK
NO OUTPUT
NO DISPLAYS
TEST NOT OK
NO
DISPLAYS
NO HIGH
VOLTAGE DC
DISPLAYS OK
OK
VOLTAGE
OUTPUT
VOLTAGE
ALSO CHECK FOR +12V ON U12, & U13
AUXILARY SUPPLIES
CHECK +5, -5, +12, +18, +6.2
1
13
25
14
1
2
3
4
5
6
7
8
OFF (OPEN)
ON (CLOSED)
CONNECTOR J3
CONNECTIONS FOR LOCAL
CONTROL AND SENSING
SWITCH SW1
READ SECTION 4.3 BEFORE PROCEEDING AND PERFORM
THE PRELIMINARY CHECKS IN SECTION 4.3.1
TROUBLESHOOTING GUIDE
CAUTION
To Figure 4-1B
Figure 4-1A
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