Tektronix RSA3300A, Service Manual

Page: 217 / 284

Troubleshooting
RSA3303A & RSA3308A Service Manual
6- 71
This procedure helps you
determine whether the LCD display
or the CPU module is bad.
Turn on the analyzer.
Does
the initial screen
appear correctly?
Does
the analyzer
respond correctly when
the front-panel keys
are pressed?
Yes
Yes
Change the reference level (AMPLITUDE
→
Ref Level) in one dB step by rotating
the general purpose knob.
No
Can you
hear the relays
working?
Is
the analyzer
shut down correctly when
the ON/STANDBY switch
is pressed?
Yes
Yes
Display and CPU system is OK.
No
No
Unplug the coaxial cable W30 on the
RF5 module (See Figure 6--37).
Using another spectrum analyzer,
measure the output at the connector.
Is
the spectrum
measured as follows?
Frequency: 51.20 MHz
Amplitude: +16 dBm
±
3 dB
Connect an external display to the VGA
output connector on the side panel.
Is
the screen
shown normally on
the external
display?
Replace
LCD display,
LCD inverter, or
A62 Front connection board
Replace
A40 DIFP board
1
,
A40 Memory board
2
, or
A50 Mother board
No
Yes
Yes
Did
the BIOS setup
screen appear when
starting up the
analyzer?
No
No
Unplug the coaxial cable W30 on the
RF5 module (See Figure 6--37).
Using another spectrum analyzer,
measure the output at the connector.
Is
the spectrum
measured as follows?
Frequency: 51.20 MHz
Amplitude: +16 dBm
±
3 dB
Replace
Hard disk drive or
A62 Front connection board
No
Yes
Replace the CPU board.
Yes
Replace RF5 module.
Replace RF5 module.
1
S/N B020000 and above.
2
S/N below B020000 and J300100 and above.
Figure 6- 34: Troubleshooting procedure 2 — Display and CPU system