MZ-B100
SECTION 1
SERVICING NOTES
NOTES ON HANDLING THE OPTICAL
The laser diode in the optical
During repair, pay attention to electrostatic
The flexible board is easily damaged and should be handled with care.
NOTES ON LASER DIODE EMISSION CHECK
Never look into the laser diode emission from right above when checking it for adjustment. It is feared that you will lose your sight.
NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK (LCX-4R)
The laser diode in the optical
•When repairing this device with the power on, if you remove the MAIN board or open the upper panel assy, this device stops work- ing.
In this case, you can work without the device stopping by fasten- ing the hook of the open/close detect switch (S804).
S804
•This set is designed to perform automatic adjustment for each adjustment and write its value to EEPROM. Therefore, when EEPROM (IC802) has been replaced in service, be sure to per- form automatic adjustment and write resultant values to the new
EEPROM.
(Refer to Section 5 Electrical Adjustment. (page 19))
•Replacement of CXD
OPTICAL PICK-UP FLEXIBLE BOARD
zUNLEADED 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 flow) 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.
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