Hitachi DZ-MV580A Service Manual page 58

Troubleshooting > Trouble Diagnosis
4-7-2 Disassembly/reassembly to enable service position
Prohibition
Be sure to disconnect the AC adapter/charger or battery from the DZ-MV580A/MV550A.
The DZ-MV580A/MV550A has a built-in laser emitter block. Never look into it: If Laser beam
strikes your eye, it could cause serious vision damage.
Information:
Numbers in diagrams are step numbers for setting procedure. Letters in [ ] show the types of screw.
Letters in brackets ( ) show the name of parts.
(1) Setting to service position (A)
Service position (A) is mainly used for trouble
diagnosis of the power supply system and the
system of disc cover/operation buttons on side
case-R. Perform trouble diagnosis using the
check points on MAN-H/MAN circuit board.
Remove the MAN-H/MAN circuit board in
advance, referring to "5. Disassembly and
Reassembly".
1) Solder a lead wire of approx. 10 cm to the
check points (except for IC pins) on side A of
MAN-H/MAN circuit board, referring to "4-7-
1 Trouble diagnosis table" and "C-1 MAN-H/
MAN" circuit board diagram. (See Fig. 4-7-2)
Fig. 4-7-1 Service Position (A)
MAN-H/MAN
Ciruit Board (Side A)
TL2090 TL2085 TL2086 TL2082
TL2089 TL2091 TL2084 TL2095
Fig. 4-7-2 Lead wire soldering
4 - 35
LEAD
MAN-H/MAN
WIRES
CIRCUIT
BOARD
TL0522
TL0510
TL0513
TL0515
TL0512
TL0517
: Check point (TL: Test land)
: Lead wire
LEAD
WIRES