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edits
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Add info about cycle timer module and sections for pinouts
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===Transformer wiring===
The F-325X "filament" transformer used to power the entire board can be reconfigured for 115 or 230v primary voltage and is detailed on the windings themselves. The secondary should be on a 3 pin molex style connector with both wires green.
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===Tone Filters===
The tone filters are simple little daughterboards based on the Exar/MaxLinear XR2211ACP<ref>https://assets.maxlinear.com/web/documents/xr2211av104.pdf</ref> FSK/Tone decoder IC.
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===Decoder Modules===
The decoder modules take in the logic low pulses from the tone filters and use some logic circuitry to eventually send a signal to the timer module to start a cycle.
'''ICs:'''
'''U1''' - Motorola MC14069UBCP<ref>https://www.mouser.com/datasheet/2/308/1/MC14069UB_D-2315482.pdf</ref> (Hex Inverter)
'''U2''' - Motorola MC14050BCP<ref>https://www.mouser.com/datasheet/2/308/1/mc14049b_d-1193035.pdf</ref> (Hex Buffer)
'''U3''' - Motorola MC14073BCP<ref>https://www.mouser.com/datasheet/2/308/1/MC14001B_D-2315187.pdf</ref> (B-Series Triple 3−Input AND Gate)
'''U4''' - Motorola MC1455P1<ref>https://www.onsemi.com/pdf/datasheet/mc1455-d.pdf</ref> (555 Timer)
'''Pinout (left to right):'''
*'''Left'''
** P1-1:
** P1-2:
** P1-3:
** P1-4:
** P1-5: Vin (+12v)
* '''Right'''
** P2-1: GND
** P2-2:
** P2-3:
** P2-4:
** P2-5:
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===Timer Module===
More examination needs to be done, but this module appears to latch the relay for a configured amount of time. I have seen multiple of these on other models that can do more signals such as "Attack" or "Fire", some with more DIP switches populated.
The covered DIP switches on the top presumably of SW1 control parameters of the timing cycle, feeding configuring the 8 bits of the Maxim timer IC. Those bits configure the time delay by connecting each of the pins 1 through 8 on the IC through the a 10kOhm resistor (R3) to VCC. The DIP switch config for the steady 3 min cycle timer is, from left to right (Up = ON): up, down, up, down, down, up, down, up. This sets pins 1, 3, 6 and 8 high, and 2,4,5,and 7 low (the DIP switch numbers are backwards in reference to the IC pins). This equates to a RC time constant of 165. Pin 13 of the IC is the RC input which is fed by a 1.1MOhm resistor and a 1uF 35v tantalum capacitor. Cross referencing those values in the datasheet chart, we get a RC timebase of 1Hz. The confusing part is that with these figures, we get a cycle time of 165 seconds, not 180 as 3 minutes would work out to. I will have to try setting switches 8, 6, 5 and 4 high which should equal exactly 180s. '''ICs (Steady Cycle Timer 031-0389-000):''' U1 - Motorola MC14081BCP<ref>https://www.mouser.com/datasheet/2/308/1/MC14001B_D-2315187.pdf</ref> (B-Series CMOS Quad 2−Input AND Gate) U2 - Motorola MC14011BCP<ref>https://www.mouser.com/datasheet/2/308/1/MC14001B_D-2315187.pdf</ref> (B-Series CMOS Quad 2−Input NAND Gate) U3 - N/A (Populated on other boards) U4 - Maxim ICM7240IPE<ref>https://www.analog.com/media/jp/technical-documentation/data-sheets/1360.pdf</ref> (Programmable Timer/Counter IC) '''Pinout (left to right):''' There are no markings on this board but this needs to be investigated moreI will use the same naming convention as the others. *'''Left'''** P1-1:** P1-2:** P1-3:** P1-4:** P1-5: Vin (+12v) * '''Right'''** P2-1: GND** P2-2:** P2-3:** P2-4:** P2-5:
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===Relay Driver Module===
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==General Notes/Things to Watch Out For==