TROUBLESHOOTING GUIDE TS3
D. Equipment Setup:
Perform the following checking procedures, setup the equipment as
followings:
1. DC Power Supply 1.5A or above , set to 12.0VDC.
2. Oscilloscope (OSC) 20MHz or above x 1
Set the Time/Div to 2.0 us and set the Volt/Div to 2 Vdc.
3. Digital Multi-Meter (DVM) , set to DC Volt.
E. Checking procedures:
Follow the assembly drawing AS1, remove the cover and keep all parts for
further assembly
1.
Refer to the components location LY1.
3/!
Connect the DC power supply (-) to the battery charger output (-).
!
Connect the DC power supply (+) to the F1 fuse FC1.
3.
Set the DVM to DC Volt, connect the (+) to U1 pin 12 and connect the (-)
to U1 pin 9. The normal reading should be between 10~12VDC. ( If the
reading is out of this range, check if the equipment DC power supply
setup is correct or not)
4.
Connect the OSC (+) to U1 pin 8 and (-) to U1 pin 9 to check the wave
form and then connect (+) to U1 pin 11 and (-) to U1 pin 9 to check the
waveform again. The following wave form (fig.1) should be appeared
otherwise U1 is damaged.
Fig.1
