Hitachi DH 52ME Service Manual page 19

After completing disassembly and repair, measure the insulation resistance and dielectric strength.
Insulation resistance: 7 M or higher (as measured with a 500 VDC megohm tester)
Dielectric strength: 4,000 VAC/1 minute, with no abnormalities --- 220 to 240 V and 110 V for UK products
2,500 VAC/1 minute, with no abnormalities --- 110 to 127 V (Except UK products)
After no-load operation for 30 minutes, the no-load current values should be as follows:
110 V
Voltage
5.7 A
Current max.
• Wiring diagram
Stator Sensor
PCB Set <54>
Insulation test
No-load current value
120 V 127 V
5.4 A 5.0 A
Connecting diagram
Panel Ass'y
<67>
8-wire
Black
Black
White White
Controller Ass'y
<63>
Red
Red
5-wire
On Lock PCB
(B) [109] {111}
-18-
220 V 230 V
3.2 A 3.0 A
Switch <77>
On Lock PCB
(A) Ass'y <92>
3-wire
Red Red
Filter PCB
Black Black
Ass'y <71>
3-wire
240 V
2.9 A
Pillar terminal