Technical Manual
Table Of Contents
- Vocoder and Controller Boards Detailed Theory of Operation
- Introduction to This Section
- General
- Vocoder Board
- Controller Board
- Switching Regulator
- RX Signal Path
- TX Signal Path
- Controller Bootstrap and Asynchronous Buses
- Vocoder Bootstrap
- SPI Bus Interface
- Universal Connector and Option Selects
- Keypad and Display Module
- Controls and Control Top Flex
- Controller Memory Map
- Vocoder Memory Map
- MCU System Clock
- DSP System Clock
- Radio Power-Up/ Power-Down Sequence
- Notes
- Secure Modules
- Disassembly/Reassembly Procedures
- Troubleshooting Procedures
- Troubleshooting Charts
- Troubleshooting Waveforms
- Troubleshooting Diagrams
10-19
Chart 17. Key Load Fail
Repair
connection.
Verify and repair
connection of RTSIN*,
RS232_DIN, and
CTSOUT* signals from
KVL to universal
connector to J101.
Verify operation of
MUX by seeing +5V
on U717-4 and
activity on U717-2.
Verify the use of the correct keyloader per the following table:
Secure Module Kit(s) KVL Kit(s) Description
NTN8253 T3011DX DES
NTN8254 T3011DX DES-XL
NTN8255 T3011DX DES-OFB
NTN8256 T3012DX DVI-XL
NTN8257 T3014DX DVP-XL
NTN8258 T3011DX DES-OFB/DES-XL
NTN8259 T3011DX & T3014DX DES-OFB/DVP-XL
NTN8260 T3011DX & T3014DX DES-XL & DVP-XL
NTN8261 T3014DX & T3012DX DVP-XL & DVI-XL
NTN8326
NTN8328
NTN8329
NTN8330
NTN8331
NTN8418
NTN8705
0105956V67
T3011DX & T3012DX
T3010DX
T3012DX & T3010DX
T3011DX & T3010DX
T3014DX & T3010DX
T3011DX
T3011DX & T3010DX
KVLS3000
DES-OFB/DVI-XL
DVP
DVI-XL & DVP
DES-XL & DVP
DVP-XL & DVP
DES-OFB/DES
DES-OFB &DVP
All Encryption
except DVP
Verify the use of the correct KVL cable as a TKN8506.
With KVL attached to
radio and radio on,
verify display
message "KEYLOAD"
Obtain correct
KVL and cable.
Keyload
Failure
No
Synopsis
This failure relates only to
secure equipped radios and
indicates a failure to load key
with the KVL indicated by the
message "KEYFAIL" and key
fail tone. Typical failure modes
would be:
1) Open between universal
connector C which places
radio in Keyload mode.
2) Use of wrong KVL or KVL
cable for ASTRO Digital
XTS 3000 radio.
3) Failure of secure module.
"KEYLOAD"
message
displayed?
Correct
equipment?
Yes
No
With KVL attached to
radio and radio on,
inititate a keyload by
pressing P-T-T on the
keyloader and look for
activity on J601-15.
Activity?
Yes
Verify connection
of KEYFAIL*
from the universal
connector pin 13 to
J101-2 and U717-1.
Verify
connection
across J601.
Good
connection?
MUX
OK?
Good
connection?
Repair
connection.
Replace
secure module.
Yes
No
No
Replace
U717.
No
Yes
Yes
Yes
No
MAEPF-26031-A
Replace
U702.