Description Of Main Circuit Operation - Hitachi RAM-71QH5 Service Manual

DESCRIPTION OF MAIN CIRCUIT OPERATION

MODEL RAM-71QH5
1. Power Circuit
POWER P.W.B.(1/2)
25A FUSE
BLK
L
VARISTOR 1
SURGE
ABSORBER
R001
WHT
N
L007
C71
GRN1
0V
C103
0V
GRN2
L006
JW5
GRN3
This circuit full-wave rectifies 220-240 AC applied between terminals L and N, and boosts it to a required
voltage with the active module, to create a DC voltage.
These rectify the 220-240V AC from
terminals L and N to a DC power supply.
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COIL POWER RELAY
NF COIL
R002 R003
JW3
R009
DIODE STACK
R005
Fig. 1-1
REACTOR
YEL
SPM2
L1
TB7
YEL
TB8
GRY
ICP RELAY
TB2
BLU
RED
– 50 –
YEL
L2
TB6
TB11
TB11
TB11