100 Minute Master Up/Down Timer: Difference between revisions
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==Replacement Parts== | ==Replacement Parts== | ||
=== | ===Main PCB=== | ||
{| class="wikitable sortable" | {| class="wikitable sortable" | ||
|+Capacitors | |+Capacitors | ||
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! Order Links | ! Order Links | ||
|- | |- | ||
| | |C1 | ||
| | |1 | ||
| | |478TTA010M-ND | ||
|[https://www.digikey.com/ Digikey] | |[https://www.digikey.com/en/products/detail/illinois-capacitor/478TTA010M/5413011 Digikey] | ||
|- | |||
|C2, C3 | |||
|2 | |||
|493-1797-ND | |||
|[https://www.digikey.com/en/products/detail/nichicon/UPW1C332MHD/589538 Digikey] | |||
|} | |} | ||
''If parts are not available or different selection is preferred, you can use the values in the [[#Original_Parts|Original Parts]] section to perform a parametric search.'' | ''If parts are not available or different selection is preferred, you can use the values in the [[#Original_Parts|Original Parts]] section to perform a parametric search.'' |
Revision as of 07:42, 13 February 2022
100 Minute Master Up/Down Timer
Preliminary Information | |
---|---|
Release Year | 1994 |
Leak Risk | Low |
Batteries | None |
Mounting Technology | Through Hole, Sockets |
Capacitor Types | Aluminum Electrolytic, Ceramic |
Destructive Entry | No |
This is a standalone timer used in studios for synchronizing coundown/countup clocks.
Known Issues
The linear power supply runs hot and relies on electrolytic capacitors.
Symptom or Problem Encountered
No display No timing signal
Causes
- Dried out electrolytic capacitors and a blown linear regulator IC.
Solutions
- Replace faulty parts.
Disassembly Notes
This device is easy to disassemble. The case is held together with screws and the PCB can be detached from the plastic standoffs easily. Make sure to snip the cable ties to make the wires long enough to flip over the board.
Original Parts
Main PCB
ES362A
RefDes | Qty | Capacitance | Voltage | Mount | Diameter/Size | Lead Spacing | Temp | Type | Brand | Series |
---|---|---|---|---|---|---|---|---|---|---|
C1 | 1 | 4700 µF | 10 | Through Hole, Axial | 12mm | 85 °C | Electrolytic | Shoei | CE | |
C2, C3 | 2 | 3300 µF | 16 | Through Hole, Radial | 16mm | 0.3" | 105 °C | Electrolytic | Shoei | CEW |
C4 | 1 | 10 µF | 35 | Through Hole, Radial | 5mm | 0.1" | 105 °C | Electrolytic | Shoei | CEW |
C5 | 1 | 100 µF | 25 | Through Hole, Radial | 6mm | 0.1" | 105 °C | Electrolytic | Shoei | CEW |
C6, C7 | 2 | 10 pF | 50 | Through Hole, Radial | 4mm | 0.2" | Ceramic Disc | |||
C8, C10 | 3 | 0.01 µF | 50 | Through Hole, Radial | 6mm | 0.2" | Ceramic Disc | |||
C9 | 1 | 4.7 µF | 50 | Through Hole, Radial | 4mm | 0.1" | 105 °C | Electrolytic | Shoei | CEW |
C11 | 1 | 0.1 µF | 50 | Through Hole, Radial | 5mm | 0.2" | Ceramic Disc |
Replacement Parts
Main PCB
RefDes | Qty | Compatible Part Number | Order Links |
---|---|---|---|
C1 | 1 | 478TTA010M-ND | Digikey |
C2, C3 | 2 | 493-1797-ND | Digikey |
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/