Thermal Dynamics CUTMASTER 60i Service Manual page 47

Details:
a. Meter + lead on GND_PRI and - lead to each of the 3 AC terminals. Normally it should measure as one
diode in the forward direction (about 0.4V to 0.5V with Fluke meter).
b. Reversing the leads, + on AC, - on GND_PRI, it should measure higher with voltage/resistance increas-
ing (charging a capacitor).
c. Now repeat the measurement for the terminal to the right of BRIDGE + with the leads as follows: Me-
ter – lead on the terminal to the right of BRIDGE + and the +lead on each AC terminal normal should
measure as one diode in the forward direction (about 0.4V to 0.5V with Fluke meter).
Art # A-13327
d. Reversing the leads, - lead on each of the AC terminals and + lead on the terminal to the right of BRIDGE
+, should measure higher with voltage/resistance increasing (charging a capacitor).
If any of these read the same in either direction, high (open) or low or near zero then remove the Bias board
and measure the bridge separately. If results are the same then replace the bridge rectifier.
Manual 0-5475
3Ø
1Ø
MOV304 MOV305
GND PRI
BRIDGE+
TP8 TP23
15 UV LO LINE
J302
TP22 D302
HI LINE
TP4 TP21
BUS CHK +15V PRI
ACINSEN
D303
1
C301
C300
1
T301
C303
+15V
J303 +
6 4
+24V
3 1
HS302 D304
C305
J304
D307 -15V
C307
SERVICE
CUTMASTER 60i
E300
CHASSIS
GND
GRN/YEL
MOV300 MOV301 MOV302
1
K300
MOV306
R300 R301
1
T300
R302 R303
C302
J305
1
1
5-13