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projects:repair:philips_pe1542_power_supply

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projects:repair:philips_pe1542_power_supply [2019/10/28 00:23] adminprojects: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)
  
 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.
  
projects/repair/philips_pe1542_power_supply.txt · Last modified: 2019/10/28 00:28 by admin