Connection and Operation
2 units repaired, both RS-232, one at 4800 baud one at 19200, both 8-1-n. 12V DC power, polarity doesn’t matter (internal bridge-rectifier).
On power-up the LCD steps through displaying the settings. Immediately after this display press MON then CAM to access the menu. To exit the menu press CAM to reach option 8, then MON.
Repairs
Number One : reported joystick not working, but keypad OK.
Joystick found to be OK, but the LCD would not always boot-up reliably when power applied. General internal clean-up and it now seems OK. The problem was with the LCD rather than the main keyboard controller.
Construction has a plastic sheet clamped between the upper plastic housing and the button side (top) of the main pcb. The main pcb is through-hole construction and apparently hand soldered with quite a lot of flux residue. Quite a lot of the soldering from the bottom did not penetrate the through-holes to the top of the board. Some of the component lead ends were quite long and interfered with the top plastic sheet.
Number Two : reported keyboard not working but joystick OK.
Most of the keys were not working, but the fault was intermittent. This suggested other than a switch fault. This keyboard contained more dust etc from general use. To remove the plastic sheet and clean the top of the pcb required removing all of t he key switches and cleaning out the pcb holes – time consuming. After a good clean out, cleaning of the pcb and switches, tidy up of some of the component soldering and rebuild, it is now working reliably.
Codes
Joystick – ascii codes transmitted via RS-232:
| left | 1La to 8La | 8La to 1La backwards | analog 8-steps |
| right | 1Ra to 8Ra | 8Ra to 1Ra backwards | analog 8-steps |
| up | 1Ua to 8Ua | 8Ua to 1Ua backwards | analog 8-steps |
| down | 1Da to 8Da | 8Da to 1Da backwards | analog 8-steps |
| rotate-cw | 1Ta | 0Ta | switch only, not analog |
| rotate-ccw | 1Wa | 0Wa | switch only, not analog |
Number pad – ascii codes transmitted via RS-232:
| 1,2,3,4,5,6,7,8,9,0 | on LCD only | under ENTER | |
| MON | Ma | numbers + MON |
1Ma, 2Ma, 3Ma… etc. 5 digit max, eg. 12345Ma |
| CAM | #a | numbers + CAM |
1#a, 2#a, 3#a… etc. 5 digit max, eg. 12345#a |
right side pad – ascii codes transmitted via RS-232:
(n) : means a number entered on the numeric keypad appears here (less the brackets).
| 2×2 | 2Va | ALARM | EaIa or (n)Ea(n)Ia |
| 3×3 | 3Va | SPECIAL | 9999Ea9999Ia |
| 4×4 | 4Va | FUN | (n)%a |
| SEQ | Ha | CLEAR | Ka (see note 1:) |
| LAST | 2+a | ACK | (n)_a |
| NEXT | +a | FLIP | 1:a |
note 1: the clear key produces a RS-232 output if the LCD ENTER data is clear, otherwise it clears the LCD data and produces no RS-232 output.
left side small pad – ascii codes transmitted via RS-232:
(n) : means a number entered on the numeric keypad appears here (less the brackets).
| INST. REPLAY | (n)?a | BOOK MARK | (n)Xa |
| RECORD ON/OFF | 1*a or 2*a (toggles on/off) | LOCK | 1Ja or 2Ja (toggles on/off) |
| HOME | 2:a | MACRO | (n)=a |
| PATTERN | (n)Pa | PRESET | (n)\a |
left side small pad – ascii codes transmitted via RS-232:
| AUX ON | Aa (press), 0Aa (release) | AUX OFF | Ba (press), 0Ba (release) |
| FOCUS FAR | 1Fa (press), 0Fa (release) | FOCUS NEAR | 1Na (press), 0Na (release) |
| IRIS OPEN | 1Oa (press), 0Oa (release) | IRIS CLOSE | 1Ca (press), 0Ca (release) |
| LISTEN | <a or 0<a (toggles on/off) | AUDIO P.T.T. | !a (press), 0!a (release) |
end.