INVERTEC V300-I
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F-40
TROUBLESHOOTING & REPAIR
11. If 15 VDC is present at step 7, test
Capacitor voltages using leads shown
in Figure F.28.
If voltage does not match table, check
reconnect for proper position for voltage
applied. Also test Capacitor balance.
Refer to Static and Dynamic Capacitor
Balance Tests.
OVERVOLTAGE PROTECTION DC TRIGGER CIRCUIT TEST
(continued)
FIGURE F.28 — OVERVOLTAGE PROTECTION DC TRIGGER CIRCUIT.
THESE LEADS
ARE USED FOR
MONITORING
CAPACITOR
VOLTAGES
SEE TABLE 1
BELOW
#311
#313
52
14
53
51
1J8
3J8
TABLE 1:INPUT VOLTS FOR
460 VOLTS AC
LEADS
NORMAL
52-53
51-53
14-53
14-52
325 VDC
325 VDC
14-15 VDC
315 VDC
OPTOCOUPLER
DEPENDENT ON
PROTECTION BOARD
IF AC TRIGGER
CIRCUIT IS GOOD,
#301 LEAD
IS TAKEN TO
CIRCUIT COMMON
#275D
POWER
BOARD
CONTROL
BOARD
+15 VDC
4J1
5J1
6J6
1J6
1J14
2J14
PROTECTION
BOARD
#302
#275D
(+)
(-)
#301
#305
