Motorola Xts5000 Detailled 6881094c31 E Manual

November 16, 20066881094C31-E
5-40Troubleshooting Charts: TX RF (UHF R1/700-800 MHz)
TX RF (UHF R1/700-800 MHz)—Page 2
MAEPF-27420-B
RAWB+
about
7.2 Vdc? Measure
RAWB+
at Q107-drain
No
No
No
Ye sYe s Ye s
Check
continuity V.gate
about 2 to
3 Vdc?Check
continuity
DC bias is OK,
control is OK,
RFIN is OK,
PA has low gain
Replace
Q107NoYe sMeasure RF
level at
pin 6 of Q107 Is
unit
VHF?
No
Ye sRemove SH101
and check for
parts off pad Level
about
+35 dBm?
Replace U102.
For VHF, check under
SH101. if all parts...

6881094C31-ENovember 16, 2006
Troubleshooting Charts: TX RF (UHF R1/700-800 MHz) 5-41
TX RF (UHF R1/700-800 MHz)—Page 3
INT > 5 Vdc? Vgate at TP111
is low (< 4 Vdc)
Measure INT 
at TP104
Ye s
No
No
Ye sYe sNoReplace
Q108
INT is low.
Measure VLIM
at TP119
PCIC is
programmed.
Measure TEMP
at R130Bad PCIC
Replace U104 VLIM
about 2 to
3 Vdc?
No
Ye s Measure
RFIN at
TP101TEMP
< 1.0 Vdc at
25C?
RFIN is low, INT
is low, bad PCIC,
replace U104TP101
< 0.5 Vdc?Low output power,
RFIN is high, check
RF detectors...

November 16, 20066881094C31-E
5-42Troubleshooting Charts: Keyload Failure
5.17 Keyload Failure
MAEPF-27388-B
No
NoYe s
Ye s NoKeyload Failure 
KEYLOAD
message
displayed?
With KVL attached to radio
and radio on, initiate a
keyload by pressing PTT on
the keyloader and look for
activity on J701-1
Ye sVerify
connection
across J701
Repair
connection Correct
equipment? Obtain correct
KVL and
cable
No Verify and repair
connection of UC_CTS,
UC_RS232DIN_USB-,
and UC_OPT_SEL2 signals
from KVL to universal...

6881094C31-ENovember 16, 2006
Troubleshooting Charts: Secure Hardware Failure 5-43
5.18 Secure Hardware Failure
MAEPF-27387-O
Ye s
No Ye s
No No
NoFail
09/10 or 09/90
Secure Hardware
Failure
Connections
good?Repair
connections
Ye sReplace
secure
module Verify electrical activity
at the following signals
at power up: Connections
good? Repair
opens
No Ye s
Is
known good
module
available?Replace module
with known good
one and retestVerify connections
to secure module
through J701
Signals
good? Ye s
Replace...

November 16, 20066881094C31-E
5-44Troubleshooting Charts: Secure Hardware Failure
Notes 

Chapter 6 Troubleshooting Waveforms
This chapter contains images of waveforms that might be useful in verifying operation of certain parts 
of the circuitry. These waveforms are for reference only; the actual data depicted will vary depending 
on operating conditions.
6.1 List of Waveforms
Table 6-1 lists each waveform and the page on which the waveform can be found.
Table 6-1.  List of Waveforms
WaveformPage No.
13 MHz Clock 6-2
16.8 MHz Buffer Input and Output 6-3
32.768 kHz Clock Outputs 6-4
SPI B...

November 16, 20066881094C31-E
6-2Troubleshooting Waveforms: 13 MHz Clock
6.2 13 MHz Clock
13 MHz clock from U301 to U501.
Trace 1: Trace recorded at C303 on the NTN9564 board.
Similar waveform is visible on C339 on the NNTN4563, NNTN4819, NNTN4717 & NNTN5567 
VOCON boards.
Figure 6-1.  13 MHz Clock Waveform
MAEPF-27490-O 

6881094C31-ENovember 16, 2006
Troubleshooting Waveforms: 16.8 MHz Buffer Input and Output 6-3
6.3 16.8 MHz Buffer Input and Output
Trace 1: Buffer input at R452.
Trace 2: Buffer output at C452 or C450 (NNTN5567).
Note: These components are under shield SH101 on the NNTN4563, NNTN4819, & NNTN4717 
VOCON boards.
Figure 6-2.  16.8 MHz Buffer Input and Output Waveforms
MAEPF-27491-O 

November 16, 20066881094C31-E
6-4Troubleshooting Waveforms: 32.768 kHz Clock Outputs
6.4 32.768 kHz Clock Outputs
Trace 1: Output at C313 (to real-time clock of GCAP II IC) or R543 (NNTN5567).
Trace 2: Output at U302, pin 2 (to Patriot IC CKIL input).
Note: These components are under shield SH102 on the NNTN4563, NNTN4819, & NNTN4717 
VOCON boards.
Figure 6-3.  32.768 kHz Clock Outputs Waveforms
MAEPF-27492-O 

6881094C31-ENovember 16, 2006
Troubleshooting Waveforms: SPI B Data6-5
6.5 SPI B Data
Trace 1: GCAP II IC chip enable at R539 (Note active high) or TP_MAKO_CE (NNTN5567).
Trace 2: SPI data clock at Test Point SCKB or at SCKB (NNTN5567).
Trace 3: SPI data to GCAP II IC at Test Point MOSIB or SPI data from Patriot at Test Point 
MOSIB (NNTN5567).
Figure 6-4.  SPI B Data Waveforms
MAEPF-27493-O