Service Note; Discharging Of The Flash Units Charging Capacitor; Lcd Type Judging Method - Sony MVC-FD71 Service Manual

[Discharging of the FLASH unit's charging capacitor]
The charging capacitor of the FLASH unit is charged up to the
maximum 300 V potential.
There is a danger of electric shock by this high voltage when the
battery is handled by hand. The electric shock is caused by the
charged voltage which is kept without discharging when the main
power of the MVC-FD71 is simply turned off. Therefore, the re-
maining voltage must be discharged as described below.
Preparing the Short Jig
To preparing the short jig. a small clip is attached to each end of a
resistor of 1kΩ /1W (1-215-869-11)
Wrap insulating tape fully around the leads of the resistor to pre-
vent electrical shock.

[LCD type judging method]

The LCD type can be judged by measuring resistance between 4
pin and !¢ pin of CPC-9 jig.
Resistance LCD Type
10 kΩ SHARP
0 Ω
CASIO
Digital voltmeter

SERVICE NOTE

1kΩ/1W
Wrap insulating tape.
CPC-9 jig
(J-6082-393-B)
!¢ pin
4 pin
Discharging the Capacitor
Short-circuit between the positive and the negative terminals of
charged capacitor with the short jig about 10 seconds.
Flash unit
–
– 4 –
Charge
capacitor
+
Short jig