1
Circuitry of the MVC-FD85, 90 and 95 Boards
Board
Function
Repairable
Lens
Zoom, Shutter (iris).
No
CD
Camera CCD Imager, Steady Shot
sensors (MVC-FD95 only).
Yes
PK
Pushbuttons, LEDs, Date/Time Battery,
LCD & backlight driver, in/out jacks
Yes
VF
Electronic viewfinder (only in MVCFD95)
Yes
FU140/146
DC input, Fuses.
Yes
Flash Unit
Camera Flash, intensity sensor, self timer
LED.
No
FC-72
Power, Camera and Floppy Drive Control,
Flash control, HI (human interface) IC,
Audio Process. Main board with BGA IC.
No
Introduction
The first Sony Mavica consumer still camera was produced in 1996. That
early camera was compact and had a flash but did not have zoom. The
flash only worked as long as the AC adapter was connected. The pic-
tures were stored in the camera’s internal memory and downloaded to a
computer.
The new Mavica cameras are loaded with features and can store pictures
in one of three formats:
•
Floppy disc
•
Memory stick
•
Recordable CD (CDR)
The most popular format at this time is the floppy disc because of its
versatility. The alternate formats offer increased resolution and more pic-
ture storage as we move away from the smaller storage capacity of floppy
discs.
Common Failures
Currently the common failures in the floppy disc format Mavica series
are limited to:
1. Floppy drive units
2. Flash assembly
3. Lens assembly
As time goes on more items will begin to fail, starting with consumer ac-
cessible items such as
•
Sticky push buttons
•
DC-in connectors
•
Vanadium-Lithium date/time battery (Located on the back of the
PK50/PK52 board)
•
Backlight and LCD panel
Purpose of this book
The purpose of this book is to learn what is involved when repairs get
more difficult, enabling you to efficiently complete these repairs. To do
this you will need to know the following:
•
Precautions from High Voltage
•
Normal operation and model features
•
How to use the (RM-95 and Radar W) memory access jigs
•
Circuit Operation
•
Important adjustments
Electronic Contents of Mavica
The MVC-FD85 is the representative model because of its popularity. The
MVC-FD90 and MVC-FD95 models are similar except for features. The
MVC-FD95 has a different lens assembly and electronic viewfinder so it
looks different from the front. Troubleshooting and disassembly are the
same for all these popular models.
The main FC-72 board in all three of these models contains a Ball Grid
Array (BGA) IC. BGA ICs require expensive equipment and time to re-
place. To avoid purchasing this equipment, the main board is replaced if
found bad. There are other assemblies replaced as a unit. See the chart.
Note that an internal rechargeable date/time battery on the PK board has
replaced the traditional date/time coin battery.
