TCI Replacement 2020 It Works

bg04.gif
nxp_semiconductors.GIF


NXP Semiconductors N.V.
http://
Part No. P89LPC922A1 P89LPC9211FDH P89LPC922A1FDH P89LPC922A1FN
Description 8-bit microcontroller with accelerated two-clock 80C51 core 2 kB/4 kB/8 kB 3 V byte-erasable flash with 8-bit ADC
8-bit microcontroller with accelerated two-clock 80C51 core 2 kB-4 kB-8 kB 3 V byte-erasable flash with 8-bit ADC

File Size 519.88K / 75 Page
View it Online

Download Datasheet







bg04.gif
nxp_semiconductors.GIF


NXP Semiconductors
http://
Part No. P89LPC9222A1 P89LPC922A1FDH P89LPC922A1FN P89LPC9251 P89LPC9251FDH P89LPC9201 P89LPC9201FDH P89LPC9211 P89LPC9211FDH P89LPC9241 P89LPC9241FDH
Description 8-bit microcontroller with accelerated two-clock 80C51 core 2 kB/4 kB/8 kB 3 V byte-erasable flash
 
I have to admit I was really surprised the board was silkscreened in english. I'm wondering if the electrolytic is a power supply filter. The coil is grounded by the box to charge the coil and then momentary ungrounds the coil momentary. It look to be about the size of the cap in the output of a CDI box. wonder if this thing goes both ways (CDI TCI) depending on which output is used.
 
Last edited:
... I'm wondering if the electrolytic is a power supply filter...

That'd be my guess.

Justa clarification on the Grounds.
Notice that the Green GND wire and the grounded Green/White signal (-) wire are connected to the adjacent upper corner pins, with the "unused" in between.

20200614_Gonzo-08.jpg


Jim, double-check your post #442...

Edit: What this means is, with a 2-wire floating pickup coil, you can wire it either way, for whatever polarity you want. With a single-wire pickup (grounded body), its single wire can only go to the pin that's diagonally opposite the GND pin, which would be the Gonzo box's Blue/White "PC" wire...
 
Last edited:
It feels like puffy paper, like the absorbent dielectric paper used in electrolytics. If I knew what the fluid was, I could replenish it and seal it off. I guess I could seal it off now, and hope that it hasn't dried out. Remember the limited life of electrolytics, due to drying out of the liquid dielectric?

Google: "electrolytic capacitor lifetime".
 
: Looking at the soldering I think they must buy generic TCI igniter module and then solder the wires to the connector. The duckster box I have is a very similar size and weight and the texture of the box is similar.
 
I suspect the devices just to left of the resistors hooked up to the PC terminals are op amps to condition the pickup signal for feeding into the plc.
We discussed the pickup wiring and using twisted pair to reduce the cross talk. I'm thinking that it probably is cross talk in the wiring. The "issue" only occurs at higher rpm when the voltage generated by the pickup increases. With the unused coil unterminated there is nothing loading the coil so the voltage can increase to a higher level than the pickup that has the box hooked to it. On top op that I think the voltages in both coils is probably quite a bit higher than the gn250 pickup and lump of metal.I think the 1156 between the unused hot side of the unused pickup and the center tap will limit the voltage the same way a PMA shunt regulator reduces the 50-60 volts from the stator at high rpm to ~14 volts.
 
It looks to me as if all the soldering has been done by hand, even the Microprocessor. I have seen this on cheap Chinese boards before. This is how they get the price so low: Somewhere in a small village a family works 24/7 soldering all the components on the board for next to zero pay.

I have seen it mentioned in various ignition articles over the years that the ground wire on the pickup should use the the ground on the board, not the chassis ground. No explanation was given.
 
Back
Top