Table of Contents
Azden PCS-2000 Control Head
I have an Azden PCS-2000 25w mobile 2meter rig I bought roughly 15 years ago at a hamfest in Chicago. I got it for a song because it had been in an accident, and the display didn't work properly. I sat on it, hoping to fix it someday. Now that I'm getting back into the hobby, instead of fixing it I've decided that I would build my own control head and use it as a base at my desk.
Control Pin Chart
I've soldered some ribbon cables to the control head connector so I could get the pinout. Pin number counts from the sharpie line I drew on the cable. It corresponds to the left side of the connector, with the radio facing you.
| Top Pins (Side A) | ||
|---|---|---|
| # | Function | Notes |
| 1 | 8 volts on, .5 volts off | |
| 2 | 13v on, slow climbdown off | |
| 3 | (unk) | |
| 4 | 5kHz shift (high) | |
| 5 | (unk) .2v on, 0 off | |
| 6 | Signal Strength, or Audio Out 1) | |
| 7 | (unk) | |
| 8 | (unk) | |
| 9 | PTT? 12v on, 5v off | |
| 10 | MHz Pin 1 | Apin 9 |
| 11 | MHz Pin 0 | Apin 8 |
| 12 | 100kHz BCD 2 | Apin 7 |
| 13 | 100kHz BCD 0 | Apin 6 |
| 14 | 10kHz BCD 2 | APin 5 |
| 15 | 10kHZ BCD 0 | APin 4 |
| Bottom Pins (Side B) | ||
|---|---|---|
| # | Function | Notes |
| 1 | ||
| 2 | ||
| 3 | ||
| 4 | ||
| 5 | ||
| 6 | ||
| 7 | ||
| 8 | ||
| 9 | ||
| 10 | ||
| 11 | ||
| 12 | 100kHz BCD 3 | APin 15 |
| 13 | 100kHz BCD 1 | APin 14 |
| 14 | 10kHz BCD 3 | APin 16 |
| 15 | 10kHz BCD 1 | Apin 10 |
Tuning the Radio
There are three components to tuning the radio, using eleven pins on the edge connector.
Note: It appears that according to the schematic, there are two tuning pins I have not yet found. However, the connector appears to be different from the one on my radio.
| 14 | 7 | . | 28 | 5 |
| unused | MHz Pins | kHz BCD Pins | 5kHz Pin |
MHz Position Pins
Two pins control the MHz position, following this chart:
| MHz | Pin 0 | Pin 1 |
|---|---|---|
| 4 | HIGH | HIGH |
| 5 | HIGH | LOW |
| 6 | LOW | HIGH |
| 7 | LOW | LOW |
100 kHz and 10 kHz Position Pins
These are binary encoded decimal. Four pins for each digit.
5kHz
Bringing pin 4 high tunes up 5 kHz.
Documentation
Here are documents that I've found, scouring the web:
- TC9122 Datasheet– one of the few chips I've been able to identify so far
- PCS-2000 user manual– The only documentation Azden, who doesn't make radios anymore has on this rig.