Camera Switches; Overview; Troubleshooting - Sony DSC-S75 Training Manual

Chapter 9 - DSC-S75 and DSC-S85 Camera Switches

Overview

Theses cameras uses a variety of switches, all of which are mounted on flex board assemblies. Since they
are mounted deep inside the camera and on the rear cover, they cannot be checked "live". When a switch
stops responding, it may be because it became defective or a break occurred in its associated flex assembly.
In either case, the flex assembly should be replaced.
In some instances, a switch may intermittently short, causing an associated response from the camera.

Troubleshooting

Shorted Switches
? In some cases, a shorted switch may prevent other switches from working.
Open Switches
Switches that do not close can be checked with a Service RM-95 jig to determine if a switch or switch block is
closed or open. With the jig, the switches can be checked "live" and without disassembling the camera. Without
the RM-95, the unit must be disassembled and the switch contacts checked with an ohmmeter at the flex board
while at the same time pushing on the switch.
? Replace the switch block assembly if the camera turns on spontaneously. The ON/OFF switch may be
defective.
? Check the lens-cap-on sensor switch if the camera indicates that the lens is on (and it is not).
Testing Switches with RM-95
1. Connect the Service RM-95 to the interface jig and power up the camera.
2. With the RM-95, proceed to data page 2,
3. Table 9-1 shows addresses for the switches. To check a particular switch, go to the address for the
switch and activate the switch. If it is working properly, the correct data for the switch will be displayed in
the RM-95. Note that the active data is not a fixed but can be within range of numbers shown in the table.
For example: When pressing the Control Down switch, any data between 00 and 0C at address 90 is
acceptable.
4. On some switches, the binary value of an internal register must be determined. This is done by using
Table 9-2 to convert the displayed data to a register value. The least significant data bit displays the
values of bit registers 0 to 3; the most significant data bit displays the values of bit registers 4 to 7.
9. DSC-S75 and DSC-S85 Camera Switches
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