Specifications

Chapter 6 Troubleshooting & Maintenance RIGOL
Service Guide for DM3058
6-7
Components Inspection
From this part, you can get more information about malfunction in order to process
advanced troubleshooting by yourself.
1. Fuse
DM3058 has three types of fuse which are: power fuse, current input fuse on rear
panel and inside current input fuse of mainboard, the parameters are as follows:
Power fuse: 300 mA, AC 250 V, quick-break
Current input fuse on rear panel: 10 A, AC 250 V, quick-melt
Inside current input fuse of mainboard: 12 A, AC 250 V, slow-melt
Current fuse: 10 A, quick-break
Note: The last two fuses adopt series to protect the current input
Inspection method：Take out the fuse and execute continuity test using meter.
The current input fuse can be tested using another method: separately insect the
two test leads into socket LO and I and switch to continuity test; short-circuit the
test leads, if the testing result is Connecting, which denotes the fuse is normal, if
not, which denotes the fuse may be melted.
2. Power Frequency Transformer
DM3058 adopts power frequency transformer to supply, and the power socket
equips with fuse socket and switch. You can select the input winding for
transformer through voltage switcher so as to suit different mains voltage. For the
country equips 220V voltage, switch to 230V or else damages to device may
happen; for the country equips 110V voltage, switch to 115V or else the device
can not start up.
Inspection procedure:
(1) Cut off the power supply.
(2) Setup the voltage switcher.
(3) Open the cage.
(4) Re-power on and switch the power to the position of “1”.
(5) Check the voltage between every winding of transformer.
(6) Cur off the power supply again.
(7) Clearing faults and re-inspect, then fit up the case.
WARNING
Once you open the chassis and power-on, any parts of your body is
forbidden touching with the conductor inside to avoid electric shock!
!