Service manual

Chapter 5 E40S/E60S Fault Finding
FileStore Service Manual 99
5. E40S/E60S Fault finding
The following chapter describes the suggested methods of fault finding on a FileStore
E40S/E60S when the fault is not clearly in a specific area.
When the FileStore E40S/E60S is powered up, the following sequence of operations, should
take place, as indicated by various activity indicators on the FileStore:
(1) On initial power up, the power indicator and mode/activity indicator should light up.
(2) The hard disc will spin up to speed in a few seconds. This process produces a rising
pitch humming noise which means that the hard disc is spinning, If the disc is not
spinning, then check the power supply and connections.
(3) Each hard disc is then accessed in turn, as indicated by the drive indicator.
(4) The floppy disc drive indicator for the FileStore E01S will light up.
(5) All indicator lights should then extinguish, except the power indicator lights, on the
FileStore E01 and any connected E40S/E60S units. The FileStore E4OS/E60S is now
ready for use.
If the above power on routine fails, then the FileStore is faulty. Follow the fault finding
procedure outlined below. This should help you to discover any basic fault with the FileStore.
The F40S/E60S unit consists of two major components:
 the hard disc drive
 the switch-mode power supply.
5.1 Power Supply
The E40S/E60S is powered by a switch mode power supply. The power supply output cables
are colour- coded as follows
black ground
red +5V
orange +12V
The power supply can be tested by measuring the +5 voltage between the black and red
cables, and the +12 voltage between the black and orange cables. The allowable voltage
ranges are as follows:
+5V (black and red) 4.9V to 5.2V
+12V (black and orange) 11.4V to 12.6V
These measurements should be made with all connectors in p1ace.
Next measure the current drawn by the components specified above from the .5V and +12V
supplies. The current measurement should be made in Series with either the red cable (+5V)
or the orange cable (+12V). The connections to the meter to do this must be made with the
power switch off. The measurements must be made after power-up as some of the circuitry,
when working correctly, will alter its current consumption with time as shown below. The
current drawn by each component from each voltage rail should be follows:
+5V 0.7 to lA
+12V up to 2.5A, falling to around 0.4 to 0.9A when up to
speed, in approximately two seconds.