Servicing Notes - Sony MZ-B50 Service Manual

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 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-2R)
The laser diode in the optical pick-up block may suffer electrostatic
break-down easily. When handling it, perform soldering
bridge to the laser-tap on the flexible board. Also perform measures
against electrostatic break-down sufficiently before the operation.
The flexible board is easily damaged and should be handled with
care.
OPTICAL PICK-UP FLEXIBLE BOARD
SECTION 1

SERVICING NOTES

• When repairing this device with the power on, if you remove the
• This set is designed to perform automatic adjustment for each
• Replacement of CXD2660GA (IC502) and CXR701080-020GA
laser-tap
– 3 –
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 (S801).
S801
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 17))
(IC801) used in this set requires a special tool.