These procedures are valid for the versions of software 3.xx (e.g. 3.04), it is enough to look at not the inspection door on the eprom 27c512. In all the cases logical pcb it must be LGX23, can imports the card HF.
You can recover the file of the eprom in version 3.04 (last commercial version)
Try this for older version like v1.02, adressing is different.

It is possible to program 15 channels on this type of  Trx (Cs3-XXX, 160, 200, 450) without having recourse to an interface, the access to the menu of programming is done in the following way:

-  power On  the Trx (key  )
-  power Off and maintain the key  supported.
-  enter the code on the digital keyboard : 84715033
   you can try other code like 60609124, is useful for unlock firmware modified by users
-  keys + / - allow to move in the menu of programming:

Two screens for the configuration of display of the infos.(you can modify the first)

Finely which gives access the options of the software into hexadecimal (adresse/valor)

Screen for channels

Cloning

Password, put here 1111... (it is simpler to find the code thereafter)

End

- Enter a number of channel between 00 and 15, to enter the Tx frequency and Rx frequency.
- At the end of the programming, to press on the key  to return in normal mode.

It is possible to make a complete reset of the memory with loss of the channels..... for that enter twice the code.
The station sends beeps, it is necessary to then to indicate the HF card usez to the restart if not there is an error of synthetizer:
        1 =   50Mhz
        2 =   VHF
        3 =   UHF

Some useful addresses (with your risks and dangers to record the values before modifying them!)
 

Address	Value	Remarks
(0)01F	??	On/Off  With button = 10 Automatic = 18 (packet use on node)
(0)022	??	Classification with digital keyboard (DTMF) Yes = 10 Not = 00
(0)024	??	Roger-Beep:  128 = not of Roger beep   64 = not of selective calling Example:  Roger beep + call. sélect. = 00 = 00 hexa No R.beep without call. sélect = 192 = c0 hexa No R.beep + call. sélect = 128 = 80 hexa
(0)110	??	Ringings (support button, etc.)  Extremely = FD    Faible = 00
(0)111	??	Ringings: active = FF      crossed = 00
(0)112	??	Anti-talkative Value = seconds in Hexa
(0)116	??	Scanning channels Yes = B0 / Not = 00 The support on the postal and telecommunications authorities stops the scanning, the loss of  the revival the scanning (Sc on the screen)
(0)117	??	Threshold of stop scanning 48 < > 75 (defect 51)
(0)118	??	Number of channel per defect in Hexa (channel 12 = 0c)
(0)1F5	40	Allows the display of the real frequency (see further )
(0)124 (0)12F (0)1Á (0)145 (0)150 (0)15B (0)166 (0)171 (0)17C (0)187 (0)192 (0)19D (0)1A8 (0)1B3 (0)1BE	Channel 1 Channel 2 Channel 3 Channel 4 Channel 5 Channel 6 Channel 7 Channel 8 Channel 9 Channel 10 Channel 11 Channel 12 Channel 13 Channel 14 Channel 15	For each channel, with the address indicated: Power Hf:  1 = 2,5w 2 = 5w 3 = 10w 4 = 25w 32 = Classification DTMF (defect CCIR) 64 = Channel in list scanning (see address 0116) Example, I want : 25w HF, DTMF, the channel in a scan list. that gives 4 + 32 + 64 = 100 = 64 in hexa

At the time of the input of the hexadecimal values, it is sometimes necessary to have letters:
 

With	B	C	D	E	F

To configure the display

The display in frontage consists of 16 characters, during the selection of the display of the frequency, the data overlap with channels (CC), the code of call (AAA) and relay (RR). It work but it is not very readable by moments! This said, the display of the frequency comprises some little bugs

- To pass in programming mode and to publish the 1st small display:
 

Original:

K

M

M

M

R

R

A

A

A

C

C

New:

C

C

M

M

M

K

give:

C

C

4

3

3

,

5

7

5

0

K

Correspondence of the keys:
 

Character	K			MMM	Space		C
Touch		1	2		#

MMM : frequency (8 characters)
CC : number of channel
  K  : Function horn
: witness put in communication (squelch)
: S-meter
: M/A of the loudspeaker

Opening an phone relay with the 1750Hz tone

The station does not make it possible to send dial tones DTMF but CCIR... on the other hand dial tone 8 of this standard corresponds to 1747Hz what is largely sufficient.
In programming mode, to modify the following values:

 (0)06D:  08     (value dial tone)

 (0)070:  64     (1750Hz duration = value hexa X 10ms, here 1s)