AST-3G Plus II
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| This device is in the WorkNeeded:OriginalParts category because it was flagged as missing information on the original parts. It may have replacement parts listed but those cannot be assumed to be identical to the originals. If you have a list of the original parts, please feel free to add them by copying the relevant table from EditorsToolbox:Tables | 
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| This device is in the WorkNeeded:General category because it was flagged as missing general information about the device. The information may be incomplete, using default text, or inaccurate and should be verified with external sources if possible. If you can add or correct information on this page, please feel free to edit it and do so. | 
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AST-3G Plus II
| Preliminary Information | |
|---|---|
| Release Year | 1987 |
| Leak Risk | Medium |
| Batteries | None |
| Mounting Technology | Through Hole |
| Capacitor Types | Aluminum Electrolytic, MLCC |
| Destructive Entry | No |
Jumper settings and other info here
Known Issues
Three electrolytic capacitors are leaking, try to replace
Causes
- Produced in 1987, electrolytic capacitors are prone to leakage
Solutions
- Recapping
Disassembly Notes
The leaked electrolyte corrodes and causes solder oxidation, which makes it difficult to desolder. Be careful to avoid high temperature damage to the pad
Original Parts
AST-3G Plus II (C)AST 1987, FCC ID: DJK 68Y AST3G
PCB Mark: 202161-303A Silkscreen: 202161-003
| RefDes | Qty | Capacitance | Voltage | Mount | Diameter/Size | Height | Lead Spacing | Temp | Type | Brand | Series |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Others | 23 | 100 pF | Through Hole | 2.0 mm | MLCC | 104 | |||||
| C35 | 1 | 2.2 pF | Through Hole | 2.0 mm | MLCC | 222 | |||||
| C26, C27, C28, C29, C30, C31, C32, C33 | 8 | 47 nF | Through Hole | 2.0 mm | MLCC | 47K | |||||
| C1, C2, C3 | 3 | 22 µF | 16 V | Through Hole | 5 mm | 5 mm | 2.0 mm | 85 °C | Aluminum electrolytic | ELNA | 018 H |
Replacement Parts
0805 SMD 22uF 16V - 50V 10%
The lead spacing is too limited, I'd like use SMD on back of PCB where the through holes are filled with solder.
| RefDes | Qty | Compatible Part Number | Order Links |
|---|---|---|---|
| Digikey |
Through Hole Capacitors
| RefDes | Qty | Compatible Part Number | Order Links |
|---|---|---|---|
| C1, C2, C3 | 3 | ECE-A1CKS220 | DigiKey Mouser |
If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search.
Kits
- Digikey BOM: https://www.digikey.com/