Anritsu MT8802A - Detecting Faulty Blocks

Section 4 Troubleshooting
4-2
4.1 Detecting Faulty Block
General
Phenomenon Cause to be supposed Fault block
The Stby LED lamp does not light on.
The Power on LED lamp does not light on.
The system stopped on the logo screen.
Z4 Power supply2
Standby switch
Fuse
A07 PANEL CONTROL
Z3 Power supply1
A07 PANEL CONTROL
A01 MAIN CPU
A02 BASEBAND1
A03 BASEBAND2
A04 DEMOD DSP
A05 MOD DSP
A12 IF
A15 REFERENCE
A30 CDMA BASEBAND
TX Tester
Phenomenon Cause to be supposed Fault block
When an RF signal is input, "Level under" or
"Level over" appears on the screen.
Otherwise, the measurement result is not
normal.
The power meter measurement result is not
normal.
Signal route operation error
LO error
LO frequency setting error
LO frequency setting error
TDMA system
CDMA system
Signal route operation error
Z2 HSP-2H(10)
Z1 Step attenuator
A09 RF I/F
A12 IF
A04 DEOD DSP
A10 CONVERTER
A11 LOCAL
A01 MAIN CPU
A01 MAIN CPU
A19 FREQ CONT
A01 MAIN CPU
A30 CDMA BASEBAND
Z2 HSP-2H(10)
A09 RF I/F
A12 IF
A01 MAIN CPU