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FD Speedometer-Odometer Circuit Board - Components Only

3rd Generation Specific (1993-2002) 1993-2002 Discussion including performance modifications and Technical Support Sections.

FD Speedometer-Odometer Circuit Board - Components Only

Old 07-20-17, 10:11 PM
  #26  
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Updated List - Added C15

This list reflects the decoded value of C15.

Capacitors (Values shown)(Temp on all Caps: 105*C)
C1: 10uF, 50V, DigiKey P/N: 493-1890-ND
C2: 47uF, 25V, DigiKey P/N: P5539-ND
C3: 1000uF, 6.3V, DigiKey P/N: P10199-ND
C4: 1uF, 50V, DigiKey P/N: 565-1332-ND
C5: *Surface mount device on backside of board*
C6: 1uF, 50V, DigiKey P/N: 565-1332-ND
C7: *Surface mount device on backside of board*
C8: *Surface mount device on backside of board*
C9: R33 (line 1) BP (line 2), 50V, *P/N search suggests 33uF*
C10: *Surface mount device on backside of board*
C11: 2.2uF, 50V, DigiKey P/N: P13462-ND
C12: 10uF, 50V, DigiKey P/N: 493-1890-ND
C13: 1uF, 50V, DigiKey P/N: 565-1332-ND
C14: *Surface mount device on backside of board*
C15: 0.015uF, 50V, Mouser P/N: 80-MMK5153J50J01TA18 *CAUTION: Refer to Post #25!*
C16: 2.2, 50V, *Need capacitance value, could be uF or pF*
C17: 1, 50V, *Need capacitance value, could be uF or pF*

Resistors:
R10: 20Ω, 5% Tolerance (stamped 20ΩJ)
R18: 20kΩ, 5% Tolerance
R25: 10kΩ, 5% Tolerance
VR: 200kΩ, Digikey P/N: 3306K-204-ND, manufacturer P/N: 3306K-1-204

Integrated Circuits:
IC1: 744C14A
IC2: TA78DS
IC3: 93C56EN
IC4: L2903 *not 12903 from the photos*
IC5: D75108GF(A)
IC6: AN8363UBK
IC7: M6544

Power Transistors:
TR1: D1922 (line 1), E (under last 2)
TR2: D1922 (line 1), E (under last 2)
TR3: G8 (device is very small, next to ZD6)
TR4: B1217
TR5: C458 (line 1), D (line 2), 3D1 (line 3), Google " transistor 2SC458"*
TR6: A143 (line 1), X.SZ (line 2)
TR7: C144 (line 1), ESZ (line 2), Google this P/N NTE123AP*
TR8: C144 (line 1), ESZ (line 2), Google this P/N NTE123AP*
TR9: C1214 (line 1), C (under last 4)

* - Search on Google resulted in transistor for purchase on other sites (not DigiKey or Mouser Electronics).

Diode Arrays:
DA1: P209 (line 1), S. X (line 2)
DA2: DA218

Resistor Arrays:
RA1: *Not Installed*
RA2: E10kΩ39, *Implies 10kΩ resistance)

Crystal:
XTAL: 4190A (line 1), 3N2 (line 2)

Diodes:
D1: *No markings*
D2: *No markings*
D3: *No markings*
D4: *No markings*
D5: *No markings*

Zener Diodes:
ZD1: *Illegible*
ZD2: *Illegible*
ZD3: *Illegible*
ZD4: 1N4742A, DigiKey P/N: 1N4742AFSCT-ND, Radio Shack P/N: 2760563
ZD5: 5 *Partial*
ZD6: PZ627
ZD7: *Illegible*
ZD8: 3 *Partial*
ZD9: 3 *Partial*
ZD10: 30 *Partial*
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Old 09-02-17, 12:02 AM
  #27  
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Originally Posted by Gen2n3 View Post
Here is a link for the datasheet on DA1: ROHM - datasheet pdf

But DA2 (DA218) is a bit harder to find. This is the closest datasheet that I found: Datasheet Archive

The 2nd link actually shows data for P209 and DA218. When the link opens, click the 3rd PDF link.

FD Kid, Did DA2 have a melt down? I hope these links help you. Please let me know if you find a suitable replacement for DA2.

Cheers,
George
Just Curious if anyone knows the equivalent to P209 and DA218? I am in need of replacing these. Cant seem to find. Also for TR6 location for A143 transistor.

I Replaced the big capacitor (it was blown) and the smaller ones (10uf, 50v) just in case. My odometer still didnt work. So I looked all over, used the multimeter to check connections, all the chips have good connection to the board. The only thing i saw was that transistor being TR7 and Diode DA2 gave no readings, when check with the meter. Also the connections looked a bit corroded. When I used my Desolder gun to remove the solder to DA2 and DA1, and pulled them out, the leads pretty much crumbled off.

Everything on my gauge cluster worked but the Odometer.

This is becoming a huge annoyance.

Last edited by EpyonFD; 09-02-17 at 12:06 AM.
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Old 09-02-17, 09:04 PM
  #28  
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So it looks like these might work:

TR6 (A143): 10 PCS DTA143XSA TO-92S DTA143 A143 Digital transistors (built-in resistors) | eBay

DA2 (DA218): 5pcs 10pcs DA218S DA218-S Transistor TO-92 100% ROHM New And Genuine | eBay

DA1 (P209): still looking

Any Rejections so far to these replacements?
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Old 09-04-17, 03:04 PM
  #29  
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Epyon,

It looks like TR6 and DA2 links from ebay look like the proper replacement parts. Naturally, it would be better to find an electronics supply store (Mouser, DigiKey, etc) that carries these components under a specific part number. This way other Members could easily order the specific quantity and/or easily get replacement components that superseded the original part numbers.

Any luck with DA1's replacement?

Cheers,
George
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Old 09-05-17, 03:25 PM
  #30  
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Hmmm, I don't understand how or why but my original post vanished into thin air! So 2nd attempt:

I have some good news and some bad news about the diode array, DA1. First the good news because it is very short. The part number for DA1, P209 was made by a company called Rohm Semiconductors. The part number is DAP209 or DAP209S. Either part number will work because their specifications are identical.

The only difference between them is the packaging type. The DAP209 package is a TO-92 can, similar to IC2 (see reference pic of this thread). A TO-92 can looks like a cylinder with a flat spot on one side. The DAP209S package is a SPT package. Basically, it looks like a trapezoidal encasement. The SPT package type was used on the speedometer board. Again, either packaging could be used without any loss in performance.

And now the bad news....
I reached out to Rohm Semiconductors via email and received a reply today. Here is their reply:

Hello George,

The DAP209 and DAP209S are very old parts, and we unfortunately no longer make parts in these packages anymore.

We only have surface mounted packages available for these parts:
Switching Diode - DAP202K | ROHM Semiconductor - ROHM Co., Ltd.
Switching Diode - DAP202UM | ROHM Semiconductor - ROHM Co., Ltd.

**End of Reply**

The links are for surface mounted devices (SMDs). Therefore the limited ways to get a replacement diode array are to replace the next higher assembly - either the speedometer circuit board or the (whole) speedometer assembly, or salvage solid state components from bad circuit boards.

For those interested, take a look at the file attachment for the DAP209 datasheet. I also want to point out the difference between the DANxxx and DAPxxx series of diode arrays. The "N" represents a common cathode diode array, or simply a common negative (-) lead. The "P" represents a common anode diode array, or simply a common positive (+) lead. Our circuit board requires the DAPxxx series diode array in order to function normally. Otherwise, the DANxxx series diode array would always keep the circuit switched off.

I also searched DigiKey for any other potential replacements using the specifications from the datasheet. My search returned only 2 devices and they were both SMDs!

Does anyone else have other suggestions to replace DA1 with an appropriate replacement?

Cheers,
George
Attached Files
File Type: pdf
192904_DS.pdf (199.1 KB, 40 views)
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Old 09-05-17, 03:30 PM
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Originally Posted by EpyonFD View Post
So it looks like these might work:

TR6 (A143): 10 PCS DTA143XSA TO-92S DTA143 A143 Digital transistors (built-in resistors) | eBay

DA2 (DA218): 5pcs 10pcs DA218S DA218-S Transistor TO-92 100% ROHM New And Genuine | eBay

DA1 (P209): still looking

Any Rejections so far to these replacements?
Please let me know how the 2 replacements work out for you. I wouldn't mind updating the parts list from your results.

Cheers,
George
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Old 09-05-17, 04:28 PM
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Hey George,

Thanks for sharing that information.

I would provide part numbers but I dont know them. Those two ebay links were as close I could get/find for a replacement. I posted up on some electronics forums in hopes of some electronic guru to chime in but so far they dont know either.

Currently Waiting on the parts to come in and I will update with results.

Good news for me is that DA1 (P209) is still in ok condition according to my multimeter, so I will use it again. I also bought a used gauge cluster in Km, for back up if the above doesnt work out. Kind of taking a gamble with the used cluster but I think it should be ok.

I also contacted Knight Sports since they still sell these odometer/speedo combo new, though highly doubt ill get a reply from them with part numbers, hehe. I did speak with a rep at DigiKey and they werent able to help me out.

Edit:
Just checked on one of those electronics forum and this is what someone from China said

https://www.eevblog.com/forum/repair/odometer-repair/

"DA218S is series connected dual diode with 0.1A, 80V rating. Pin definition: A1-K1A1-K2.
A143 is likely to be a pre-biased PNP, can be replaced with NXP PDTA143."

Last edited by EpyonFD; 09-05-17 at 04:36 PM.
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Old 09-06-17, 03:32 PM
  #33  
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Epyon,

I believe those links to the ebay components are a good start but only for short term. An electronics store/website like Mouser or DigiKey would be preferred as they could resupply stock from a host of manufacturers. It's good to hear that you have a working DA1!

For the most part, TR6 and DA2 or other solid state components normally do not fail. I speculate the reason for these or other components to fail results from a large power surge; and could potentially come from modifications to the cluster. Let me stress again, that a modification to the cluster MAY POTENTIALLY cause other components to fail. The more we dig around the instrument cluster would result in inadvertent damage. So please, caution is advised when removing the instrument cluster and its gauges.

***Break***

And now for something completely different! Well, not really...but there is some good news to report!

As previously stated, the DAP209 diode array was superseded by SMD (Surface Mounted Devices) under part numbers: DAP202K or DAP202UM. Refer to Post #30. The difference between these new SMD components is the package size. One is a SC-59 package while the other is a SC-85 package.

I received a couple of more emails from the Rohm Semiconductors Engineering Dept regarding a workaround for DA1.

Rohm Engineering Reply:

Hello George,

I was able to find a breakout board on digi-key for converting from SC-59 to through-hole.

The board is for 5 pin parts, but will still work with 3 pin.
DigiKey - Capital Advanced Technologies 33205 Adapter Board

-----------------------------------------------------------------------------------

My reply:

Many thanks for all your help! You are especially helpful in locating an adapter board.

However, the adapter looks too long to fit onto the existing board, which is part of a car's speedometer assembly. Please see the attached photos, the red circle indicates the original location of the DAP209 part. I believe the adapter board would not have the space between other components and the speedometer face.

Am I overlooking anything or could there be another solution? Could something work for the DAP202UM (SC-85 type package) instead of the DAP202K (SC-59 type package)?

Could these options be used?
DigiKey - Capital Advanced Technologies 6103 Adapter Board
DigiKey - Capital Advanced Technologies 33003 Adapter Board

Again, my sincerest thanks for all your help!

Cheers,
George

NOTE: I also sent them 3 photos (not attached here) that showed the location of DA1.

--------------------------------------------------------------------------------------

Rohm Engineering Reply:

Hi George,

I would think that the 33003 part(for SOT-323) should work along with the DAP202UM.

I checked the datasheet for both parts, and the pinout will be the same.
The orientation that you place the part in shouldn't play a difference either.

This should work for your need.
Part can be ordered here:
DigiKey - Rohm Semiconductor DAP202UMTL

-------------------------------------------------------------------------------------

In conclusion, the DAP202 series of SMD superseded the DAP209 series of components. Should anyone's DA1 fail then an option exists to use the DAP202 series of SMD component along with the Capital Advanced Technologies 33003 adapter board. I would presume that some modification to the adapter's legs would be required to fit into the through holes.

I believe this would be the best solution if a Member wants to use brand new components instead of cannibalizing discrete components from bad circuit boards. The big question to ask is: Who is willing to try this replacement?

Cheers,
George
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Old 09-06-17, 04:03 PM
  #34  
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Exclamation Updates to IC4 and DA1 Part Numbers

This list reflects updates to IC4 and DA1. I await feedback on TR6 and DA2 replacement part numbers.

Capacitors (Values shown)(Temp on all Caps: 105*C)
C1: 10uF, 50V, DigiKey P/N: 493-1890-ND
C2: 47uF, 25V, DigiKey P/N: P5539-ND
C3: 1000uF, 6.3V, DigiKey P/N: P10199-ND
C4: 1uF, 50V, DigiKey P/N: 565-1332-ND
C5: *Surface mount device on backside of board*
C6: 1uF, 50V, DigiKey P/N: 565-1332-ND
C7: *Surface mount device on backside of board*
C8: *Surface mount device on backside of board*
C9: R33 (line 1) BP (line 2), 50V, *P/N search suggests 33uF*
C10: *Surface mount device on backside of board*
C11: 2.2uF, 50V, DigiKey P/N: P13462-ND
C12: 10uF, 50V, DigiKey P/N: 493-1890-ND
C13: 1uF, 50V, DigiKey P/N: 565-1332-ND
C14: *Surface mount device on backside of board*
C15: 0.015uF, 50V, Mouser P/N: 80-MMK5153J50J01TA18 *CAUTION: Refer to Post #25!*
C16: 2.2, 50V, *Need capacitance value, could be uF or pF*
C17: 1, 50V, *Need capacitance value, could be uF or pF*

Resistors:
R10: 20Ω, 5% Tolerance (stamped 20ΩJ)
R18: 20kΩ, 5% Tolerance
R25: 10kΩ, 5% Tolerance
VR: 200kΩ, Digikey P/N: 3306K-204-ND, Manufacturer P/N: 3306K-1-204

Integrated Circuits:
IC1: 744C14A
IC2: TA78DS
IC3: 93C56EN
IC4: LM2903, DigiKey P/N: 497-1559-2-ND, Manufacturer P/N: LM2903DT
IC5: D75108GF(A)
IC6: AN8363UBK
IC7: M6544

Power Transistors:
TR1: D1922 (line 1), E (under last 2)
TR2: D1922 (line 1), E (under last 2)
TR3: G8 (device is very small, next to ZD6)
TR4: B1217
TR5: C458 (line 1), D (line 2), 3D1 (line 3), Google "transistor 2SC458"*
TR6: A143 (line 1), X.SZ (line 2)
TR7: C144 (line 1), ESZ (line 2), Google this P/N NTE123AP*
TR8: C144 (line 1), ESZ (line 2), Google this P/N NTE123AP*
TR9: C1214 (line 1), C (under last 4)

* - Search on Google resulted in transistor for purchase on other sites (not DigiKey or Mouser Electronics).

Diode Arrays:
DA1: DAP209S (old)* or DAP202K, DigiKey P/N: DAP202KT146CT-ND, or DAP202UM, DigiKey P/N: DAP202UMTLCT-ND
DA2: DA218

* - Refer to Post #33 when using either DAP202K or DAP202UM SMD components as a replacement for DAP209.

Resistor Arrays:
RA1: *Not Installed*
RA2: E10kΩ39, (Implies 10kΩ resistance)

Crystal:
XTAL: 4190A (line 1), 3N2 (line 2)

Diodes:
D1: *No markings*
D2: *No markings*
D3: *No markings*
D4: *No markings*
D5: *No markings*

Zener Diodes:
ZD1: *Illegible*
ZD2: *Illegible*
ZD3: *Illegible*
ZD4: 1N4742A, DigiKey P/N: 1N4742AFSCT-ND, Radio Shack P/N: 2760563
ZD5: 5 *Partial*
ZD6: PZ627
ZD7: *Illegible*
ZD8: 3 *Partial*
ZD9: 3 *Partial*
ZD10: 30 *Partial*
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Old 09-16-17, 08:29 PM
  #35  
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Exclamation Updates to IC1, IC2, TR1, TR2, and TR6

This list reflects updates to IC1, IC2, TR1, TR2, and TR6 part numbers.

Capacitors (Values shown)(Temp on all Caps: 105*C)
C1: 10uF, 50V, DigiKey P/N: 493-1890-ND
C2: 47uF, 25V, DigiKey P/N: P5539-ND
C3: 1000uF, 6.3V, DigiKey P/N: P10199-ND
C4: 1uF, 50V, DigiKey P/N: 565-1332-ND
C5: *Surface mount device on backside of board*
C6: 1uF, 50V, DigiKey P/N: 565-1332-ND
C7: *Surface mount device on backside of board*
C8: *Surface mount device on backside of board*
C9: R33 (line 1) BP (line 2), 50V, *P/N search suggests 33uF*
C10: *Surface mount device on backside of board*
C11: 2.2uF, 50V, DigiKey P/N: P13462-ND
C12: 10uF, 50V, DigiKey P/N: 493-1890-ND
C13: 1uF, 50V, DigiKey P/N: 565-1332-ND
C14: *Surface mount device on backside of board*
C15: 0.015uF, 50V, Mouser P/N: 80-MMK5153J50J01TA18 *CAUTION: Refer to Post #25!*
C16: 2.2, 50V, *Need capacitance value, could be uF or pF*
C17: 1, 50V, *Need capacitance value, could be uF or pF*

Resistors:
R10: 20Ω, 5% Tolerance (stamped 20ΩJ)
R18: 20kΩ, 5% Tolerance
R25: 10kΩ, 5% Tolerance
VR: 200kΩ, Digikey P/N: 3306K-204-ND, Manufacturer P/N: 3306K-1-204

Integrated Circuits:
IC1: 744C14A (Original): 74HC14A, DigiKey P/N: MC74HC14ADR2GOSCT-ND, Manufacturer P/N: MC74HC14ADR2G or DigiKey P/N: MC74HC14ADGOS-ND, Manufacturer P/N: MC74HC14ADG
IC1 (TI alternate): Digikey P/N: 296-12887-1-ND, Manufacturer P/N: SN74HC14NSR
IC2*: TA78DS (Original), aka TA78DS05P superseded by SMD: TA78DS05AF: DigiKey P/N: TA78DS05AF(TE12L,F-ND, Manufacturer P/N: TA78DS05AF(TE12L,F
IC3: 93C56EN
IC4: LM2903, DigiKey P/N: 497-1559-2-ND, Manufacturer P/N: LM2903DT
IC5: D75108GF(A)
IC6: AN8363UBK
IC7: M6544

* - Must use SOT-89 to Through Hole Adapter with SMD type of IC2:
DigiKey P/N: 6303CA-ND, Manufacturer P/N: 6303, Link SOT-89 Adapter

Power Transistors:
TR1/TR2: 2SD1922, *Order P/N 2SD1922 from La Mesa TV Supply Company, La Mesa TV Supply - 2SD1922 *
TR1/TR2 (Alternate): DigiKey P/N: BC33825TACT-ND, Manufacturer P/N: BC33825TA
TR3: G8 (device is very small, next to ZD6)
TR4: B1217
TR5: C458 (line 1), D (line 2), 3D1 (line 3), Google "transistor 2SC458"*
TR6: A143 (Original), SMD Replacement: Mouser P/N: 771-PDTA143TU115, Manufacturer P/N: PDTA143TU,115, Package Type SOT323**
TR7: C144 (line 1), ESZ (line 2), Google this P/N NTE123AP*
TR8: C144 (line 1), ESZ (line 2), Google this P/N NTE123AP*
TR9: C1214 (line 1), C (under last 4)

* - Search on Google resulted in transistor for purchase on other sites (not DigiKey or Mouser Electronics).
** - Must use SMD to Through hole adapter, located here: DigiKey Link - SC-59 Adapter. Refer to Post #33 above.

Diode Arrays:
DA1: DAP209S (old)* or DAP202K, DigiKey P/N: DAP202KT146CT-ND, or DAP202UM, DigiKey P/N: DAP202UMTLCT-ND
DA2: DA218

* - Refer to Post #33 when using either DAP202K or DAP202UM SMD components as a replacement for DAP209.

Resistor Arrays:
RA1: *Not Installed*
RA2: E10kΩ39, (Implies 10kΩ resistance)

Crystal:
XTAL: 4190A (line 1), 3N2 (line 2)

Diodes:
D1: *No markings*
D2: *No markings*
D3: *No markings*
D4: *No markings*
D5: *No markings*

Zener Diodes:
ZD1: *Illegible*
ZD2: *Illegible*
ZD3: *Illegible*
ZD4: 1N4742A, DigiKey P/N: 1N4742AFSCT-ND, Radio Shack P/N: 2760563
ZD5: 5 *Partial*
ZD6: PZ627
ZD7: *Illegible*
ZD8: 3 *Partial*
ZD9: 3 *Partial*
ZD10: 30 *Partial*
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Old 09-21-17, 10:46 AM
  #36  
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Well an update from me. I got the parts in and replaced them. Still had no luck. I doubled check all my connections on both sides of the board and they look solid. I had purchased a used cluster RHD on ebay, but it hasnt arrived, the seller thinks maybe it got lost during shipping. So ill have to get my refund back and buy from someone else.

Really irritated with this thing. Ive read just about all the threads related to this issue and still no luck. Suppose ill keep at it and will report back if I get it to work again.
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Old 09-21-17, 01:32 PM
  #37  
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Epyon,

Do you have any photos to share of the board and replacement components? Which components did you replace: just TR6 and DA2?

Cheers,
George
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Old 09-21-17, 09:55 PM
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The fibers you see on that one brown capacitor is just hair. Some areas are a bit glob on but wanted to make sure the connection on the top side was good, since those areas solder wouldnt seep through when soldering from the back side. So I replaced all the brown capacitors, the big blue capacitor and DA2 and TR6. I re did the solder joint at t he very end on that one small chip by the brown capacitor, why it looks like that.

Anything you see that has red flags all over it and I just dont understand due to my inexperience with this stuff?
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Old 09-21-17, 10:07 PM
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Some more shots with flashlight checking the pathways on the top side of the board.

















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Old 09-21-17, 10:20 PM
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Well damn, looks like I may have a broken path. Can anyone post a picture of what it should look like, with a flashlight under neath?

Guess Ill redo those two connections on that chip at the end too.




Edit:
Found another broken Path.

The picture with the chip I think may be good still.





I think Im pretty much screwed? Not sure how to reconnect the pathways.

Last edited by EpyonFD; 09-21-17 at 10:30 PM.
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Old 09-21-17, 10:24 PM
  #41  
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Exclamation Cross-References, Adapter, and Links

This post provides updated information to support a proposed replacement transistor for TR7 and TR8. Additionally, this will also have links to SMD adapters or components sourced outside of Mouser or DigiKey. This will reduce the need to reapply web links in a parts list that receives frequent updates.

Proposed replacement information on the following components can be found here:
TR5 & TR9: Troubleshoot FD Speedo Board Post #36
TR7 & TR8: Troubleshoot FD Speedo Board Post #37
SOT-89 Adapter: DigiKey Link - SOT-89 Adapter (For use with IC2)
SC-59 Adapter: DigiKey Link - SC-59 Adapter (For use with TR6 and DA1)
Order site for IC1/IC2 Part Number 2SD1922: La Mesa TV Supply
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Old 09-21-17, 10:28 PM
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Exclamation Updates to IC3, TR5, TR7, TR8, & TR9

This list reflects updated information for IC3, TR5, TR7, TR8, and TR9.

Capacitors (Values shown)(Temp on all Caps: 105*C)
C1: 10uF, 50V, DigiKey P/N: 493-1890-ND
C2: 47uF, 25V, DigiKey P/N: P5539-ND
C3: 1000uF, 6.3V, DigiKey P/N: P10199-ND
C4: 1uF, 50V, DigiKey P/N: 565-1332-ND
C5: *Surface mount device on backside of board*
C6: 1uF, 50V, DigiKey P/N: 565-1332-ND
C7: *Surface mount device on backside of board*
C8: *Surface mount device on backside of board*
C9: R33 (line 1) BP (line 2), 50V, *P/N search suggests 33uF*
C10: *Surface mount device on backside of board*
C11: 2.2uF, 50V, DigiKey P/N: P13462-ND
C12: 10uF, 50V, DigiKey P/N: 493-1890-ND
C13: 1uF, 50V, DigiKey P/N: 565-1332-ND
C14: *Surface mount device on backside of board*
C15: 0.015uF, 50V, Mouser P/N: 80-MMK5153J50J01TA18 *CAUTION: Refer to Post #25!*
C16: 2.2, 50V, *Need capacitance value, could be uF or pF*
C17: 1, 50V, *Need capacitance value, could be uF or pF*

Resistors:
R10: 20Ω, 5% Tolerance (stamped 20ΩJ)
R18: 20kΩ, 5% Tolerance
R25: 10kΩ, 5% Tolerance
VR: 200kΩ, Digikey P/N: 3306K-204-ND, Manufacturer P/N: 3306K-1-204

Integrated Circuits:
IC1: 744C14A (Original): 74HC14A, DigiKey P/N: MC74HC14ADR2GOSCT-ND, Manufacturer P/N: MC74HC14ADR2G or DigiKey P/N: MC74HC14ADGOS-ND, Manufacturer P/N: MC74HC14ADG
IC1 (TI alternate): Digikey P/N: 296-12887-1-ND, Manufacturer P/N: SN74HC14NSR
IC2: TA78DS (Original), aka TA78DS05P superseded by SMD: TA78DS05AF: DigiKey P/N: TA78DS05AF(TE12L,F-ND, Manufacturer P/N: TA78DS05AF(TE12L,F (1)
IC3: 93C56EN (Original), Mouser P/N: 698-CAT93C56LI-G, Manufacturer P/N: CAT93C56LI-G93C56EN
IC4: LM2903, DigiKey P/N: 497-1559-2-ND, Manufacturer P/N: LM2903DT
IC5: D75108GF(A)
IC6: AN8363UBK (Obsolete Part Number, no known replacement)
IC7: M6544

(1) - Must use SOT-89 to Through Hole Adapter with SMD type of IC2. DigiKey P/N: 6303CA-ND, Manufacturer P/N: 6303. Refer to above Post #41 for link to adapter.

Power Transistors:
TR1/TR2: 2SD1922 (2)
TR1/TR2 (Alternate): DigiKey P/N: BC33825TACT-ND, Manufacturer P/N: BC33825TA
TR3: G8 (device is very small, next to ZD6)
TR4: B1217 (Obsolete Part Number, no known replacement)
TR5: C458 (Original) Cross-referenced to 2SC458, Use Alternate - Mouser P/N: BC549BTF, Manufacturer P/N: BC549BTF
TR6: A143 (Original), SMD Replacement: Mouser P/N: 771-PDTA143TU115, Manufacturer P/N: PDTA143TU,115, Package Type SOT323 (3)
TR7/TR8: C144 (Original), Cross-referenced to P/N: NTE123AP
TR7/TR8 (Proposed): Mouser P/N: 610-2N4401, Manufacturer P/N: 2N4401, See above Post #41.
TR9: C1214 (Original) Cross-referenced to P/N: 2SC1214. Use Alternates - Mouser P/N: 610-2N3416, Manufacturer P/N: 2N3416 or Mouser P/N: 610-2N3417, Manufacturer P/N: 2N3417

(2) Order P/N 2SD1922 from La Mesa TV Supply Company. Refer to above Post #41
(3) Must use SC-59 to Through hole adapter with SMD type of TR6. Refer to above Post #33/Post #41.

Diode Arrays:
DA1: DAP209S (old) or DAP202K, DigiKey P/N: DAP202KT146CT-ND, or DAP202UM, DigiKey P/N: DAP202UMTLCT-ND (2)
DA2: DA218

(2) Must use SC-59 to Through hole adapter with SMD type of DA1. Refer to Post #33/Post #41 when using either DAP202K or DAP202UM SMD components as a replacement for DAP209.

Resistor Arrays:
RA1: *Not Installed*
RA2: E10kΩ39, (Implies 10kΩ resistance)

Crystal:
XTAL: 4190A (line 1), 3N2 (line 2)

Diodes:
D1: *No markings*
D2: *No markings*
D3: *No markings*
D4: *No markings*
D5: *No markings*

Zener Diodes:
ZD1: *Illegible*
ZD2: *Illegible*
ZD3: *Illegible*
ZD4: 1N4742A, DigiKey P/N: 1N4742AFSCT-ND, Radio Shack P/N: 2760563
ZD5: 5 *Partial*
ZD6: PZ627
ZD7: *Illegible*
ZD8: 3 *Partial*
ZD9: 3 *Partial*
ZD10: 30 *Partial*

Last edited by Gen2n3; 09-21-17 at 10:33 PM. Reason: Corrected TR7/TR8 post reference.
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Old 09-21-17, 10:43 PM
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Epyon,

First let me say, "Thank you" for posting your photos. They will help out alot! Second, we should take your problem over to the Troubleshooting FD Speedo Board thread here: Troubleshoot FD Speedo Board. My goal is to keep this thread reserved for listing & identifying components of the Speedo Board.

There are many things to discuss and I believe that someone already has a speedo board at hand for quick reference. We shall call upon ALIENR2 for help.

Cheers,
George
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Old 09-21-17, 11:22 PM
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No Problem, Ill repost my stuff over there.
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Old 03-09-18, 12:13 PM
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While helping another forum member on component replacements for the speedo board, I noted a discrepancy with the alternate Part Numbers for TR5. Remember, TR5 is a transistor with 3 legs - an Emitter (E), Base (B), and Collector (C). The problem lay in the physical orientation of these legs. This even slipped by my discerning eye! This is what I found and will provide a solution below:

1. The original part number for TR5 is 2SC458. This is not disputed.
2. The transistor leg orientation of 2SC458 is E-C-B (from left to right: Emitter, Collector, then Base).
3. The alternate part number for TR5 is BC549BTF.
4. The electrical characteristics for BC549BTF are similar to the original, 2SC458 transistor.
5. However, the transistor leg orientation of BC549BTF is C-B-E (from left to right: Collector, Base, Emitter).
6. PROBLEM: Physically, the Collector leg between these two transistors are in different positions.
7. If one were to blindly replace TR5 with the alternate P/N then the transistor will be mis-configured and cause the circuit to function abnormally or not at all.
8. If using the BC549BTF transistor then one MUST reposition the legs from C-B-E to meet the original spec of E-C-B.
9. If one were to reconfigure BC549BTF then a chance to damage the legs or short them to one another is significantly higher.
10. POTENTIAL SOLUTION: Use transistor KSC1845 as a replacement.
11. Audiophiles use transistor KSC1845 as a replacement for transistor 2SC458 frequently.
12. Transistor KSC1845 has significantly higher rated specifications.
13. However, these higher specifications are listed as MAX values.

Here are some screen shots that I made to provide a comparison between the mentioned 3 transistors:


2SC458 - Note the orientation of the legs. E-C-B



BC549 - Note the orientation of the legs. C-B-E
Its electrical characteristics closely match the original 2SC458.




KSC1845 - Note the orientation of the legs. E-C-B
Its electrical characteristics far exceed the original, 2SC458 but are listed as MAX values.



This example uses a reconfigured transistor, NTE123AP.


TR5 with a different transistor, P/N: NTE123AP. Note the 2nd and 3rd legs are re-configured from E-B-C to E-C-B.

Additionally, the marking on the circuit board for TR5 indicates one physical orientation of the transistor. That is, the flat (front or billboard) side faces the viewer. Therefore, if one installed the BC549 transistor into this circuit then it would have to be turned around and have legs reconfigured like in the above photo. For those who may ask, the transistor NTE123AP did not properly work in this circuit.

I propose that KSC1845 is a suitable replacement for TR5 however, a test will be necessary.

Thank you for considering this new information.

Cheers,
George
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Old 04-24-18, 11:34 PM
  #46  
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Has anyone had luck finding a replacement for IC2? digikey is listing it as out of stock and I have a 92 cluster I'm attempting to repair with a failed unit.
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Old 04-25-18, 10:40 AM
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Here's the closest I have found for IC2: https://www.digikey.com/product-deta...NOPB-ND/148139
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Old 04-30-18, 08:05 PM
  #48  
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Spyder,

No one has yet to report a working version of IC2. Have you read Post #42 for more info about alternatives for IC2? What is the condition of IC2 on your suspected board? Based upon the datasheet and specs from Digikey, the LM2931AZ-5.0/NOPB-ND looks to be a suitable TO-92 replacement can.

Thank you for the additional research!

Cheers,
George
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Old 05-03-18, 02:00 PM
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Sadly it looks like the part numbers in post 42 are out of stock. I have ordered LM2931AZ and will report back. The unit was damaged/corroded, symptoms were no tach/speedo/odo.

I am also working on ZD 5 and 7 which were damaged. Both show partial part numbers 51A.
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Old 05-03-18, 02:23 PM
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Are you sure that ZD5 and ZD7 need replacement? Maybe the solder joints need to be redone? Could you post any pictures of your board to this thread: Troubleshooting the FD Speedo? I would like to keep this thread relevant to indexing specific components and providing valid part numbers.

Cheers,
George
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