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Williams WPC high voltage components kit
Part Number WPC-HVP-KIT
Williams WPC high voltage components kit

Williams WPC Dot Matrix Controller High Voltage Parts Kit.
Note -- all 5W resistors provided with this kit are axial leaded devices as used in earlier machines (i.e. pre-WPC95)
This kit includes the following components:
1N4759A -- Zener Diode, 62V, WPC - D3
1N4758A -- Zener Diode, 56V, WPC - D4
1N4758A -- Zener Diode, 56V, WPC - D5
1N4742A -- Zener Diode, 12V, WPC - D6
1N4004 -- 400V, 1Amp Rectifier, WPC - D7
1N4742A -- Zener Diode, 12V, WPC - D8
2N5551 -- Transistor, NPN (MPSD02 Alternate) - Q2
MJE15030 -- Transistor, NPN, WPC - Q3
2N5401 -- Transistor, PNP (MPSD52 Alternate) - Q4
2N5401 -- Transistor, PNP (MPSD52 Alternate) - Q5
MJE15031 -- Transistor, PNP - Q6
MJE15030 -- Transistor, NPN - Q7
2N5551 -- Transistor, NPN (MPSD02 Alternate), WPC - Q10
RMOS1-120 -- Resistor, 120 ohm, 1 watt, WPC - R4
RMOS1-120 -- Resistor, 120 ohm, 1 watt, WPC - R5
RMOS1-47K -- Resistor, 47K ohm, 1 watt, WPC - R3
RMOS1-47K -- Resistor, 47K ohm, 1 watt, WPC - R6
RMOS1-47K -- Resistor, 47K ohm, 1 watt, WPC - R12
RMOS1-47K -- Resistor, 47K ohm, 1 watt, WPC - R13
RC5W-4.7K -- Resistor, Cement, 4.7K ohm, 5 watt, WPC - R8
RC5W-1.8K -- Resistor, Cement, 1.8K ohm, 5 watt, WPC - R9
RC5W-120 -- Resistor, Cement, 120 ohm, 5 watt, WPC - R11

The +62V supply is comprised of the following components:
Fuse F601 (not included in kit)
Bridge Rectifier BR1 (not included in kit)
Filter Capacitor C4 (optional 220uF, 160V)
Bleeder Resistor R12 (included in kit)
Resistors R3, R4 and R11 (included in kit)
Transistors Q2, Q3 and Q10 (included in kit)
Zener Diode D3 (included in kit)
Capacitor C6 (not included in kit)

The -125V supply is comprised of the following components:
Fuse F602 (not included in kit)
Bridge Rectifier BR2 (not included in kit)
Filter Capacitor C7 (optional 220uF, 160V)
Bleeder Resistor R13 (included in kit)
Resistors R5 and R6 (included in kit)
Transistors Q4, Q5 and Q6 (included in kit)
Zener Diodes D4 and D5 (included in kit)
Capacitor C9 (not included in kit)

The -113V supply is comprised of the following components:
All -125 components plus:
Resistors R8 and R9 (included in kit)
Transistor Q7 (included in kit)
Zener Diode D6 (included in kit)

Effective 1 March 2010 - kits will no longer be provided with printed instructions.
Kit instructions can be found here (Acrobat Format)

Add two 220uF, 160V axial electrolytic capacitors to HV rebuild kit
Filter capacitors omitted
2x 220uF, 160V axial capacitors added (+$5.00)
Add two packets of heat sink compound to HV rebuild kit
Heat sink compound omitted
2x Heat sink compound added (+$0.30)
Price: $5.00