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4826 Sterling Drive, Boulder, CO 80301  PH: 720.406.8946  FX: 720.406.8967 

 

To replace the Darlington transistors, remove 4 mounting screws on each heat-sink. The TO3 
Insulator Sil-Pads should always be replaced when a transistor is reinstalled for any reason. 
 

 

 
After replacement the Darlington transistor mounting screws must be torqued to 8 inch pounds. 
 

 

 
If a transistor has failed, be certain to test the emitter resistors R11-R14.

POWER TRANSISTOR REPLACEMENT 

Summary of Contents for Power Plant Premier

Page 1: ...4826 Sterling Drive Boulder CO 80301 PH 720 406 8946 FX 720 406 8967 SERVICE MANUAL Power Plant Premier Serial numbers PPP 7J and earlier APPLICABLE PRODUCTS Document 11 037 01 1 DSM A Released 01 08...

Page 2: ...lace the unit upside down on a well protected working surface 2 Tape the side panels so they are not damaged during disassembly and reassembly Make sure the tape is stopped before the back panel 3 Rem...

Page 3: ...4826 Sterling Drive Boulder CO 80301 PH 720 406 8946 FX 720 406 8967 4 Remove 10 screws from the bottom as shown...

Page 4: ...4826 Sterling Drive Boulder CO 80301 PH 720 406 8946 FX 720 406 8967 5 Hold the top and bottom together and turn the unit over 6 Slide the top cover forward about 1 inch then tilt forward...

Page 5: ...ere is 8VAC to the Display Board connector J1 Orange Wires b Replace the Premier Display PCA 2 Display elements are missing a Replace the Premier Display PCA Sequencer IsoZone Issues 1 Sequencer IsoZo...

Page 6: ...ify that the correct fan driver transistor Q6 is installed i For units with one large and one small fan Q6 should be a BC337G and that it is installed up side down compared to the silk screen on the M...

Page 7: ...4826 Sterling Drive Boulder CO 80301 PH 720 406 8946 FX 720 406 8967 To remove the Heat Sink assemblies remove 4 screws per side HEAT SINK REMOVAL...

Page 8: ...screws on each heat sink The TO3 Insulator Sil Pads should always be replaced when a transistor is reinstalled for any reason After replacement the Darlington transistor mounting screws must be torqu...

Page 9: ...not lose the stand off spacers The thermal sensor R10 is mounted on the bottom side of the PCA so it can protrude into the heat sink This thermal sensor is sometimes glued into the insulating spacer...

Page 10: ...e screws from above and below the power cartridge using a 5 16th inch hex driver Pry the power cartridge from the in let assembly using a flat head screwdriver The power button on the power cartridge...

Page 11: ...4826 Sterling Drive Boulder CO 80301 PH 720 406 8946 FX 720 406 8967 Depress the button on the power cartridge to allow it to be removed...

Page 12: ...4826 Sterling Drive Boulder CO 80301 PH 720 406 8946 FX 720 406 8967 When replacing the power cartridge support the in let assembly to avoid damage to the mounts...

Page 13: ...driver transistor Q6 is a BC337G and that it is installed up side down compared to the silk screen on the Main PCA Use an Ohm Meter to measure for shorts between the Q6 transistor legs If a short is m...

Page 14: ...Input Distortion Lights On Input Dist 4 Output Distortion Lights On Reduct Dist 4 Start with the Input Voltage Calibration a Make sure the Input Volts Lights Are On b Use the mode up down buttons to c...

Page 15: ...Ribbon Cable PS Audio MS PREM CABLE ISOZONE IsoZone Power Outlet Assembly PS Audio MS PREM ISOZONE Premier Power Transformer PS Audio MS PREM XFMR P1 Transistor BC337G TO92 PS Kit includes transistor...

Page 16: ...720 406 8946 FX 720 406 8967 Schematics drawings manuals and other product documentation are available online to PS Audio distributors The URL is http download psaudio com Contact your sales represen...

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