5-1 Troubleshooting (GY15MS*)
Notes: 1. Before troubleshooting, setup the PCOs display as below.
Y Resolution: 1024 x 768
Y H-frequency: 61 kHz
Y V-frequency: 75 Hz
2. If no picture appears, make sure the power cord is correctly connected.
3. Check the following circuits.
Y No raster appears: Stand PCB, Main PCB
Y 14V develop but no screen: Main PCB
Y 14V does not develop: Main PCB
4. If you push and hold the Exit for more than 5 seconds, the monitor automatically turns back
to the factory preset.
5-1-1 No Power
Does proper DC 14V
NoCheck signal cable and
appear at DC jack and
power adaptor and CN201.
Pin 1 of CN201?
Yes
Does proper DC 5V, DC 3.3V
NoCheck IC201, IC202
appear at Pin 2 of IC201,
and related circuit.
and Pin 3 of IC202?
Yes
Does proper DC 1.8V NoCheck IC204
appear at Pin 4 of IC204?and related circuit.
Yes
Does proper 5.0V
appear at Pin 5, 6 of IC401 and
NoCheck IC401, IC114
Pin 7, 8 of IC401? (DC 3.3V (DPMS_ON
and related circuit.
Pin 2 and 4 (OFF_SW) of IC401
must be low level)
Yes
Check IC402.
GY15MS*/GY17MS*5-1 |
ACEC
