Tektronix H600 RFHawk, Service Manual

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Troubleshooting
Power On Self Test
Press the large oval button in the lower-left corner to power on the platform.
The power status indicator illuminates immediately. Allow several seconds for
the self test to complete.
NOTE. The Batteries indicator brie fl y illuminates red if the batteries are too low to
power on the analyzer. Connect the external power supply or charge the batteries.
If the platform does not begin to boot at power up (no power up sound), try
removing the CMOS battery backup from the Processor board (BT520). Wait
approximately 15 seconds and reinsert the battery into its socket; then press the
power switch again. If the platform still does not boot, replace the Processor board.
Display Does Not Operate
If the display does not operate try the following procedures.
Display Cable
Disconnected
Do the following:
1. Verify that both ends of the LCD display cable are properly oriented and
fully seated in their connectors.
2. Remove and reinstall the backlight cable connectors.
If these steps do not resolve the problem, replace the display.
Backlight Does Not
Illuminate
Verify the following backlight-related voltages.
WARNING.
To avoid electrical shock or burn, do not touch the backlight
connectors on the backlight inverter board.
Table 4-2: Backlight-related voltages
Board
location
Pin Location
Measured
voltage
Frequency
Backlight
Inverter board 2, 3 CN2 510 Vrms 54 kHz
1, 2 JR 1 +12 VDC
6 JR 1 0 V to +2.4 VDC
CPU board
3, 4 J660 3.3 VDC
4–14 H600 & SA2600 Service Manual