MEX-DV150UE/DV1500U/DV1505U
3
SECTION 1
SERVICING NOTES
The laser diode in the optical pick-up block may suffer electrostat-
ic break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also
use the procedure in the printed matter which is included in the
repair parts.
The
fl
exible board is easily damaged and should be handled with
care.
NOTE ON LASER DIODE EMISSION CHECK
The laser beam on this model is concentrated so as to be focused
on the disc re
fl
ective surface by the objective lens in tha optical
pick-up block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(
Caution:
Some printed circuit boards may not come printed with
the lead free mark due to their particular size)
: LEAD FREE MARK
Unleaded solder has the following characteristics.
• Unleaded solder melts at a temperature about 40 °C higher
than ordinary solder.
Ordinary soldering irons can be used but the iron tip has to be
applied to the solder joint for a slightly longer time.
Soldering irons using a temperature regulator should be set to
about 350 °C.
Caution:
The printed pattern (copper foil) may peel away if
the heated tip is applied for too long, so be careful!
• Strong
viscosity
Unleaded solder is more viscous (sticky, less prone to
fl
ow)
than ordinary solder so use caution not to let solder bridges
occur such as on IC pins, etc.
• Usable with ordinary solder
It is best to use only unleaded solder but unleaded solder may
also be added to ordinary solder.
MODEL IDENTIFICATION
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
– Bottom View –
Part No.
Region Code
Label indication
Destination
Signal format
system
Region
code
Part No.
PAL
2
4-120-894-0
[]
DV1500U: AEP and UK models
PAL
5
4-120-895-0
[]
DV150UE: Russian model
PAL
3
4-120-896-0
[]
DV1500U: E (PAL) model
NTSC
4
4-120-897-0
[]
DV1500U: E (NTSC) model
PAL
5
4-120-898-0
[]
DV1505U: Indian model
NOTE THE IC4 ON THE SERVO BOARD
REPLACING
IC4 on the SERVO board cannot exchange with single. When this
part is damaged, exchange the entire mounted board.
NOTE FOR REPLACING THE COMPLETE MAIN
BOARD
If the complete MAIN board was replaced, be sure to refer to Tech-
nical News published separately.
NOTE FOR THE 20-PIN CONNECTOR (CN901)
Do not use alcohol to clean the 20-pin connector (CN901) connect-
ing the front panel with the main body.
Do not touch the connector directly with your bare hand. Poor con-
tact may be caused.
