KP-51WS500, KP-57WS500, KP-65WS500 (serv.man5) - Sony TV Service Manual (repair manual). Page 2

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When replacing the following components marked with a �  on the 

schematic diagram always check the HV regulation, and if necessary 

re-adjust.

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1.  Receive the all white signal.
2.  Set PIC MAX/BRT CENT.
3.  ConÞ rm that the voltage between CN8015 � PIN and GND is less 

than 7.80VDC.

1.  Connect a HV static voltmeter to the unconnected plug of the 

high-voltage block.

2.  Power on the set.
3.  Receive the all white signal.
4.  Set PIC MAX/BRT CENT.
5.  ConÞ rm that the static voltmeter reading is 31.0 ± 0.4V.
  If not, adjust with VR8001 to the speciÞ ed value.
6.  After adjustment, put the VR cover on VR8001 (as shown below) and 

apply sufÞ cient amount of epoxy resin around VR8001.

Re move  the  ca p from 
the  unus e d te rmina l a nd 
con nect  a  st at ic voltmet e r 
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ep oxy re s in

VR8001

When replacing the following components marked with a �  on the 

schematic diagram always check the hold-down voltage and re-adjust 

when necessary.

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1.  Receive the dot signal.
2.  Set PIC MIN/BRT MIN.
3.  ConÞ rm that the voltage between cathode of D8038 (JW171) and 

GND is more than 23.0V DC.

4.  Using an external DC Power supply, apply the voltage shown below 

between cathode of D8038 (JW171) on “D” and GND, then conÞ rm 

that the HV-Prot circuit works. (Raster disappears)

  Apply DC voltage: Less than 29.05V DC.

1.  Connect a HV static voltmeter to the unconnected plug of the 

high-voltage block.

2.  Power on the set.
3.  Connect an external 10kΩ VR at CN8015 and adjust this VR so that 

the high voltage is 34.50kV.

4.  Adjust VR8002 to the point that the HV-Prot circuit works (Raster 

disappears) at 34.50 ± 0.50kV reading on the static voltmeter.

5.  After adjustment, put the VR cover on VR8002 and apply sufÞ cient 

amount of epoxy resin around VR8002 as the same manner for 

VR8001.