100 Minute Master Up/Down Timer
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
Basic PCB Name
| RefDes | Qty | Compatible Part Number | Order Links |
|---|---|---|---|
| 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/