MHC-V77DW
4
SECTION 1
SERVICING NOTES
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 °C
during
repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or
unsoldering.
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the
leadfree 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.
CAUTION
Use of controls or adjustments or performance of procedures
other than those speci
fi
ed herein may result in hazardous radiation
exposure.
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK
OR BASE UNIT
The laser diode in the optical pick-up block may suffer electrostatic
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.
NOTES 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 the optical
pickup block. Therefore, when checking the laser diode emission,
observe from more than 30 cm away from the objective lens.
MODEL IDENTIFICATION
This appliance is classi
fi
ed as a
CLASS 1 LASER product under
IEC 60825-1:2007. This marking
is located on the rear exterior.
Model
Part No.
LA9
4-595-019-0
[]
AUS
4-595-019-2
[]
AEP, UK
4-595-019-3
[]
E4
4-595-019-4
[]
EA
4-595-019-6
[]
RU
4-595-019-7
[]
MY
4-595-019-8
[]
TH
4-596-414-0
[]
• Abbreviation
AUS : Australian
model
E4
: African
model
EA
: Saudi
Arabia
model
LA9 :
Latin-American
model
MY :
Malaysia
model
RU :
Russian
model
TH
:
Thai
model
– Back Panel –
HOME AUDIO SYSTEM
~ 120-240 V 50/60 Hz 220 W
Manufactured under license from Dolby
Laboratories. Dolby and the double-D
symbol are trademarks of Dolby Laboratories
HECHO EN MALASIA
Only for Mexico / Sólo para México
Only for Chile / Sólo para Chile
Homologaciòn No: XXXXXXXXX-XXXX
Modelo: DHSR-SY30
Marca: Wistron NeWeb Corporation
Homologaciòn No: XXXXXXXXX-XXXX
Modelo: DHSR-SY25
Marca: Wistron NeWeb Corporation
N0. SERIE/
N
Ɩ
SERIE
0000005
NOM
NYCE
05/2016
MODEL NO.
/ MODELO : MHC-V77DW
R
4-595-019-01 LA9
