TOC
TOC
TROUBLESHOOTING & REPAIR
T1 AUXILIARY TRANSFORMER TEST (continued)
Return to Section
Return to Master
8.If the correct secondary voltages are present (according to Table F.1), the T1 transformer is functioning properly.
9.If the secondary voltages are missing or incorrect, the primary voltages must be checked.
10.Remove input power to the STT machine.
11.Perform the Input Filter Capacitor
Discharge Procedure.
12.Reconnect Plugs J30 & J31.
13.Gain access to the primary lead plug J21 by removing the reconnect panel assembly from the upper support panel using the 3/8" wrench and slot head screwdriver. This will allow the reconnect panel assembly to be moved out of the way. Be careful NOT to stress the leads connected to the reconnect panel. See Figure F.2.
14.Before applying input power make certain the reconnect panel assembly is insulated and supported for safe operation.
Return to Section TOC
Return to Section TOC
Return to Section TOC
Return to Master TOC
Return to Master TOC
Return to Master TOC
WARNING
ELECTRIC SHOCK can kill.
•Before continuing with the test procedure, per- form the capacitor dis- charge procedure to avoid electric shock.
TABLE F.1 – T1 AUXILIARY TRANSFORMER VOLTAGES
TEST POINTS | NORMAL VOLTAGE | |
|
| |
PLUG J30 PINS 1 TO 2 | 115VAC | |
(LEADS 32 TO 33) |
| |
PLUG J31 PINS 1 TO 4 | 18VAC | |
(LEADS 501 TO 504) |
| |
PLUG J31 PINS 2 TO 3 | 24VAC | |
(LEADS 212 TO 503) |
| |
PLUG J31 PINS 2 TO 5 | 42VAC | |
(LEADS 212 TO 43A) |
| |
PLUG J21 PINS 1 TO 4 | 200/208VAC | |
(LEADS H1 TO H2) |
| |
PLUG J21 PINS 1 TO 2 | 220/230VAC | |
(LEADS H1 TO H3) |
| |
PLUG J21 PINS 1 TO 3 | 380/415VAC | |
(LEADS H1 TO H4) | ||
| ||
PLUG J21 PINS 1 TO 6 | 440/460VAC | |
(LEADS H1 TO H5) (H6) | ||
|
|
NOTE: If the main AC input supply voltage varies, the auxiliary transformer voltages will vary by the same percentages.
