Hitachi DZ-MV580EAU Service Manual page 65

Troubleshooting > Trouble Diagnosis
(3) Setting to service position (C)
Service position (C) is mainly used for trouble
diagnosis of the system of operation buttons on
side case-L.
Perform trouble diagnosis using the check
points on MAN-H/MAN and AEL-H/AEL
circuit boards.
Set to service position (B) in advance.
1) Connect the L block to AEL-H/AEL circuit
board. (See Fig. 4-7-10)
(a) L block
(b) AEL-H/AEL circuit board
(a)
1)
Fig. 4-7-10 Setting to service position (C)
4 - 39
AEL-H/AEL
CIRCUIT
L-BLOCK
BOARD
SAF-H/SAF
CIRCUIT
BOARD
Fig. 4-7-9 Service Position (C)
(b)
1)
(c)
1)
LEAD
WIRES
LEAD
WIRES