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projects:repair:philips_pe1542_power_supply [2019/10/28 00:20] – admin | projects:repair:philips_pe1542_power_supply [2019/10/28 00:26] – admin |
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All 6 potentiometers to set voltage/current and the 3 voltage/current switches on the front suffer from ageing. After searching, the following replacement parts were ordered: | All 6 potentiometers to set voltage/current and the 3 voltage/current switches on the front suffer from ageing. After searching, the following replacement parts were ordered: |
* 3x Switch DPDT, ON-ON, C&K Components (Farnell: 143-7699 / Manufacturer Art. Nr. 1201M2S3CQE2) | * 3x Switch DPDT, ON-ON, C&K Components (Farnell: 143-7699 / Manufacturer Art. Nr. 1201M2S3CQE2) |
* 6X POTENTIOMETER, LINEAR, 2K2, 3W, 10% PE30L0FR222KAB By VISHAY | * 6X POTENTIOMETER, LINEAR, 2K2, 3W, 10% PE30L0FR222KAB By VISHAY (Farnell: 1141632) |
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Unfortunately, none of these parts are a direct replacement. Therefore some mechanical work is required to make these parts fit: | Unfortunately, none of these parts are a direct replacement. Therefore some mechanical work is required to make these parts fit: |
* Mount the 6 potentiometers on an aluminium L-profile, Mount the whole assembly on the front panel with two spacers. | * Mount the 6 potentiometers on an aluminium L-profile, Mount the whole assembly on the front panel with two spacers. |
* Mount each switches behind the existing switch, by removing the original contacts. The cutting a square hole at the back of the original plastic handle. By shortening the handle of the new switch, at will fit into the old handle. Use a small test circuit board and some threaded rod and screws to mount the switch to the original metal casing. | * Mount each switch behind an existing switch, by removing the original contacts. The cutting a square hole at the back of the original plastic handle. By shortening the handle of the new switch, at will fit into the old handle. Use a small test circuit board and some threaded rod and screws to mount the switch to the original metal casing. |
* On the main PCB, increase the 6 holes for the potentiometers to 12mm. The new potentiometers are too short and must be soldered using additional wires, as can be seen on the last picture below. | * On the main PCB, increase the 6 holes for the potentiometers to 12mm. The new potentiometers are too short and must be soldered using additional wires, as can be seen on the last picture below. |
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| Below some pictures of the Philips PE 1542: |
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^ Philips PE 1542 back - I ^ Philips PE 1542 back - II ^ Dupont connectors for connecting\\ switches to main board ^ | ^ back - I ^ back - II ^ Dupont connectors for connecting\\ switches to main board ^ |
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^ Philips PE 1542 front ^ Philips PE 1542 PCB - I ^ Philips PE 1542 PCB - II ^ | ^ front ^ PCB - I ^ PCB - II ^ |
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