Teletype Model 42 ASR - 4220 AAB + 4250 AAA

I am trying to figure out how to set Options on my machine. At Power-On after the back-up battery has discharged, I get an "Auto 2=*" prompt and can can edit and store an Auto 2 text string, but that's the only option I can print or edit. 

After storing Auto 2, I cannot re-enter options edit mode and Options "Prep" and "Load" keys don't do anything. I can't figure out how to list and edit options from there. HELP!

Power-On prompt
(410231 is the controller board model)
IMG_2914.jpg (84526 bytes)
Options listing taped onto a friend's M42 by a previous owner
m42_144908451.jpg (1241334 bytes)
IMG_2934.JPG (3686331 bytes) IMG_2933.JPG (3732755 bytes) IMG_2938.JPG (2448547 bytes) Model 4220 AAB Teleprinter
IMG_2943.JPG (541569 bytes)
IMG_3001.JPG (3483648 bytes) IMG_2915.JPG (2436567 bytes) 50K122/AAG Keyboard
m42-keyboard.jpg (199985 bytes)
IMG_2925.JPG (1391267 bytes)
IMG_2923.JPG (1066252 bytes) IMG_2924.JPG (965585 bytes) IMG_2927.JPG (1728368 bytes) IMG_2928.JPG (1668066 bytes)

 

IMG_2998.JPG (1389668 bytes) Power Supply 430780
IMG_2929.JPG (3040909 bytes)
Send-Receive 20/60 ma Loop
IMG_2931.JPG (1486528 bytes)
==
US Navy Modifications?

Switch labeled "Transmit"-"Receive"-"Transmit Simulator"

External Cable w/ Molex Connector - 60ma loop plus switch/lamp connections

 

IMG_2912.JPG (1526350 bytes) IMG_2913.JPG (1677153 bytes)
Switch and Indicator Lamp
IMG_2944.JPG (2151060 bytes)
IMG_2947.JPG (2602226 bytes) IMG_2921.JPG (780122 bytes) IMG_2920.JPG (922759 bytes)

Interface Circuit Card TAU3 - 410382 Dual EIA plus 20/60ma Neutral Loop 
- Description & Schematic thanks to Paul Cembura

IMG_2959.JPG (1157669 bytes) IMG_2960.JPG (84048 bytes) IMG_2961.JPG (1021528 bytes) IMG_2965.JPG (59824 bytes)
IMG_2962.JPG (2350172 bytes) IMG_2963.JPG (2480697 bytes) IMG_2964.JPG (2484302 bytes)

Controller Circuit Card - 410231 5 Level SCCAT ("Single Card Controller") - component layout
Z-80 CPU + two 64K EPROMs + 256x8 SRAM (w/battery back-up) + 1Kx8 SRAM + three USARTs

 IMG_2966.JPG (1467251 bytes)

IMG_2988.JPG (1070822 bytes) IMG_2993.JPG (1306461 bytes) --
IMG_2991.JPG (1984538 bytes) IMG_2990.JPG (2172221 bytes) IMG_2989.JPG (2052463 bytes) ==
IMG_2994.JPG (2828005 bytes) IMG_2995.JPG (3118174 bytes) IMG_2996.JPG (2808651 bytes) IMG_2997.JPG (2567331 bytes)

Logic Card 410791 Keyboard Interface & Printer Controller

IMG_3004.JPG (534417 bytes) IMG_2951.JPG (1908362 bytes) IMG_2950.JPG (954194 bytes) IMG_2949.JPG (1370829 bytes)

Paper Tape Unit - 4250 AAA - video

IMG_2937.JPG (1189070 bytes) IMG_2935.JPG (1023237 bytes) Optical tape reader
IMG_2936.JPG (1147633 bytes)
Model 4250 AAA paper tape unit
IMG_2940.JPG (227441 bytes)
IMG_2941.JPG (928508 bytes) IMG_2942.JPG (3009083 bytes) Mike Hatch's paper tape unit showing the chad box in place
pt-mike-01.jpg (97258 bytes)
Mike's chad box, chad chute, and "wing cover"

chadboxetc0168.jpg (1611950 bytes)

removed from cover
IMG_3009.JPG (1402269 bytes)
controller circuit board removed
IMG_3011.JPG (1399446 bytes)
controller circuit board removed
IMG_3013.JPG (1399930 bytes)
power supply
IMG_3016.JPG (1637040 bytes)
punch & reader controller
IMG_3010.JPG (1765972 bytes)
punch
IMG_3014.JPG (1585162 bytes)
reader
IMG_3015.JPG (857507 bytes)
self-test mode - ltrs-blank-r-y
IMG_3012.JPG (167271 bytes)

1987 Naval Sea Systems Command Safety Tag
IMG_2972.JPG (175002 bytes) IMG_2971.JPG (183842 bytes)

COMNAVSURFRESFORINST 3502.lA
31 OCT 1990

STS 101-0001 - COMMUNICATIONS REFRESHER TRAINING
Description:-  This course provides refresher training in various areas such
as Crypto Material System (CMS), ACP 126 and modified ACP
126 message formats, Task Group Orestes (TGO) circuits, and
shipboard simulator teleprinter (MOD 42) usage.

LESSON TOPIC TITLE
1.1 Communications Organizations
1.2 Introduction to Security
1.3 Accountability and Control of Classified Material
1.4 Accountability and Control of Communications Security Material System (CMS)
2.1 Outgoing Message Processing
2.2 Broadcast Circuit Operating Procedures
2.3 Incoming Message Processing
2.4 Message Reproduction/Distribution (R/D) and Filing
2.5 Genadmin Message Text Format
3.1 Model 42 Teleprinter
3.2 Operating Signals (OPSIGS)
3.3 Basic Radioteletype Circuit Operating Procedures
3.4 Basic Radiotelephone (R/T) Circuit Operating Procedures
4.1 DD-173 OCR Message Format
4.2 ACP 126 Message Format
4.3 Modified ACP 126 Message Format
4.4 JANAP 128 Message Format


Miscellaneous other Model 42 and Model 43 info: