Hitachi SJ100 SERIES Service Manual page 31

[3] Rectifier Measurement
(Ll)
R
(L2)
S
(L3)
T
This is to measure 6 rectifiers of the input side.
Resistance Measurement
From
R(Ll)
S(L2)
S(L2)
T(L3)
T(L3)
R(Ll)
R(Ll)
S(L2)
T(L3)
Each R(Ll), S(L2) and
T(L3)
-
Each R(Ll), S(L2) and
T(L3)
P1
To make sure MOV, visual check of MOV is necessary on the ISPM.
If the result is out of its spec, replace the unit. ( relative check is important )
MOV(ZNR);ZNR1,ZNR2,ZNR3 are for phase to phase
MOV(ZNR);ZNR4,ZNR5,ZNR6 are for phase to ground
RS
P1 THY
Main circuit of SJ100
To
S(L2)
R(Ll)
T(L3)
S(L2)
R(Ll)
T(L3)
R(Ll)
S(L2)
T(L3)
-
Each R(Ll), S(L2) and
T(L3)
P1
Each R(Ll), S(L2) and
T(L3)
RB
+
+1
PD
+
Rsh
Allowable Value
50kohm or more
50kohm or more
50 ohm or less
50 ohm or less
50kohm or more
6-2
CTU
CTW
R(L1)
S(L2)
T(L3)
U
V
W
P1