I wonder if anyone would have a schematic of the KAM All mode TNC. Need to
know where the reset pins are.
Thanks
Ralph VE3BBM

I wonder if anyone would have a schematic of the KAM All mode TNC.
Need to know where the reset pins are.

From page 30 ("HARD RESET") of Version 2.85 of Kantronics' "KAM KPC-4
KPC-2400 KPC-2 KPC-1 INSTALLATION MANUAL" [with added stuff in square
brackets from the "KPC-3 REFERENCE MANUAL, version 5.0" just to make
this answer more complete]:
1) Remove the PC board from the case as outlined in the Assembly and
Disassembly section, above.
2) Locate the Test/Normal jumper which is labeled NOR T (normal-test).
Jumpers are appropriately labeled on the PC board. Refer to the
parts location diagram for help in locating them.
KAM Jumper K6
KPC-1 Jumper K1
KPC-2 Jumper K3
[ KPC-3 Jumper J7 ]
KPC-4 Jumper K7
KPC-2400 Jumper K3

Looking in the manual at the parts-placement "photo" between
the "KAM Parts List" and "KAM HF MODEM" schematic pages (so
this SHOULD be a "picture" of the KAM, but its only label is
"KANTRONICS"!), with the connector end of the board closest
to my body, I find a "T NORM" (NOT "NOR T"!) jumper labeled
"K6" on the board edge adjacent to the BIGGEST IC (on the end
farthest from the IC's notch).

3) Place the jumper in the test position
[Place the jumper on both pins]
4) Apply power to the TNC
5) Observe on the computer display (your terminal program
must be set at 300 Baud):
EEPROM INIT OK [ CHECKSUM OK ]
CHECKSUM OK [ RAM OK xxxK BYTES ]
RAM OK XXXXX BYTES [ CLOCK NOT PRESENT ]
REPLACE TEST JUMPER [ REPLACE TEST JUMPER ]

Some TNCs will not display the REPLACE message.

If you have removed the 2404 EEPROM from your unit for any reason,
the EEPROM INIT message will read:
EEPROM INIT ERROR
This is a normal indication and does not indicate a failure with
your TNC.
6) Turn power off. Do not keep the TNC power on for more than a minute
or the regulator will overheat.
7) Return Test/Normal jumper to the normal position
[Return jumper J7 to the normal position (one pin only).]
8) Reassemble the TNC and return to operation.

Hope this helps.
--
--Myron A. Calhoun.
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