Hitachi RAS-5HVRNM1E Service Manual page 401

10 Servicing
N O T E
• Identify the terminal numbers with mark band. When reassembling, the terminals have to be connected to the
correct numbers . If incorrectly connected, malfunctions or damages will occur.
• Check to ensure that the electrical wires will not be caught between the assembled electrical components and
the mounting plates when the PCB2 is reassembled.
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Removing diode module and transistor module
Check to ensure that the LED201 (Red) of the PCB2 is off.
Diode Module
2
1. 5 Screws (M5).
2. Fixing screw (M5).
1 Disconnect all the wirings connected to the diode module as shown below.
• Disconnect the wirings of the terminals +, - , U, V, W on the diode module.
• Remove the two (2) screws fixing the diode module.
• Remove the diode module from the electrical box.
2 Disconnect all the wirings connected to the transistor module as shown below.
• Disconnect the wirings of connector CN2, CN206 and CN207.
• Disconnect the wirings from P, N, U, V, W on the transistor module.
• Remove the three (3) screws fixing the PCB2 and then remove the PCB2 from the transistor module.
• Remove the four (4) fixing screws on the transistor module.
• Remove the transistor module from the electrical box.
N O T E
• The correct position of the marks on the PCB2 is upside down when being assembled.
• Identify the terminal Nos. with the mark band Nos. when reassembling. If incorrectly connected, malfunction
or damage will occur.
• Check to ensure that the electrical wires will not be caught between the mounting electrical components and
the mounting plates when the PCB2 is remounted.
• Apply silicon grease evenly on the whole rear side of the diode module and the transistor module when
mounting. Silicon grease is available as a field-supplied accessory.
393
SMGB0060 rev. 1- 12/2010
1
2
1. Screws for PCB2 (M3)
2. Screw (M5)
3. Fixing screws for transistor module (M4)
4. Led201
5. Screws for PCB (M3)
6. CN207
7.CN026
8. CN2
PCB2 and transistor module
2
1 1
10
3
4
2 5
6
7
5
5
1 9 8
10