Hitachi DZ-MV380A(K) Service Manual page 21

Troubleshooting > Trouble Diagnosis
(2) Setting to service position (B) (Fig. 4-7-6)
Refer to Table 4-7-1 and the MAN and AEL circuit board diagrams: Solder a lead wire of approx. 10
cm to the check point that corresponds to the symptom (except for terminals of IC or connector/
plug).
1) Connect the MAN and AEL circuit boards.
2) Assemble the MAN and AEL circuit boards into R block.
3) Connect the DRF circuit board to MAN circuit board.
4) Connect the SEN circuit board to MAN circuit board.
5) Connect the SHE circuit board to AEL circuit board.
6) Connect all the connectors on MAN and AEL circuit boards.
7) Connect the front block and AEL circuit board via FAF circuit board.
Information:
Use the remote control for operation of button/joystick from L block that is not connected.
FRONT
BLOCK
(3) Setting to service position (C) (Figs. 4-7-6, 4-7-7)
Refer to Table 4-7-1 and the MAN and AEL circuit board diagrams: Solder a lead wire of approx. 10
cm to the check point that corresponds to the symptom (except for terminals of IC or connector/
plug).
1) Connect the MAN and AEL circuit boards. (Fig. 4-7-6)
2) Assemble the MAN and AEL circuit boards into R block.
3) Connect the DRF circuit board to MAN circuit board.
4) Connect the SEN circuit board to MAN circuit board.
5) Connect the SHE circuit board to AEL circuit board.
6) Connect all the connectors on MAN and AEL circuit boards.
7) Connect the front block and AEL circuit board via FAF circuit board.
SHE
CIRCUIT
BOARD
SEN
CIRCUIT
BOARD
R BLOCK
2
6-1
6-3
6-2
MAN CIRCUIT
BOARD
7
FAF CIRCUIT
BOARD
Fig. 4-7-6 Setting to Service Position (B) or (C)
4 - 4
DRF
CIRCUIT
BOARD
3
5
4
6
1 1
6
AEL CIRCUIT
BOARD
7