Ultra-Cut – Auto-Cut   LEDs, Test Points & Switches
　　CCM I/O PCB  19X2174
　　LEDs
　　D1    GAS_ON            Signal to turn on gas for GCM 1000.
　　D2    E-STOP_PS           E-Stop OK to power supply.
　　D4    OK_CNC        OK to Move relay (signal to CNC) on.
　　D15    PSR            PSR relay on (sends pilot on to CNC).
　　D21    CNC_E-STOP        Remote E-Stop (TB1-1 & 2) closed.
　　D23    CNC _START        Start from CNC is on.
　　D26    HOLD_START    Hold Start applied from CNC or THC.
　　D28    CNC_PREFLOW    Turns preflow gas on prior to Start signal.
　　Test Points  
　　All TP voltages except isolated TP’s (TP6, 7,8, 10) are relative to TP1.
　　TP1    Circuit common (gnd).  
　　TP2    29-41 VDC (24 VAC input rectified).
　　TP3    +15 VDC
　　TP4    +5 VDC
　　TP5    -15 VDC
　　TP6    +15 VDC_ISO isolated (measure from TP10, isolated common).
　　TP7    -15 VDC_ISO isolated  (measure from TP10, isolated common).
　　TP8     +16 to +18 VDC isolated, supply for isolated input section.
　　TP9    Analog Current Control signal, 0-3.3VDC, to CPU. From GCM 1000 Current Control Pot if SW11 set to “B” position or remote analog current control input if SW11 set to “A” position (used with SW8-2 on CPU board).
　　TP10    ISO_GND  Common for isolated voltages (TP6,7,8).
　　TP11    Power supply negative (electrode) voltage.
　　TP12    Tip voltage.
　　TP13    Cut Demand to power supply.
　　TP14     Pilot Demand to power supply.
　　Switches
　　SW6    OK to Move selects contact closure (SW down) or DC Volts (SW up).
　　SW11    The default “B” position (up) selects Analog current control from
　　GCM1000.  “A” position (down), along with CPU board SW8-2 on (up), selects Remote Isolated Analog Current Control from TP1-9 & 10 or J15-3 & 6.
　　SW12    Selects divided arc voltage ratio; 50:1 (default), 40:1, 30:1, 16.6:1 (used
　　for SC-11).
　　SW13    Ultracut – Autocut Configuration (-1) .
　　CCM CPU PCB  19X2169
　　LEDS
　　D11    on at power up while CPU is initializing then off.
　　D12    Status Code LED  (same as front panel Status LED)
　　D13    +5 VDC Power
　　Test Points
　　TP1    GND  (digital)
　　TP2      AGND (analog gnd)
　　TP3    +5VDC
　　TP4    /WR
　　TP5    +3.3VA  voltage supply for analog circuits (relative to TP2).
　　TP6    TEMP_SENSE  processor internal temperature signal.
　　TP7    /RD
　　TP8    CLKO  processor clock output.
　　TP9    +15VDAC  supply for D/A converters.
　　TP10    -15VDAC   supply for D/A converters.
　　TP11    3.3V  voltage supply.
　　Switches
　　SW1    Selects Auto Pilot Restart (-1) and Delayed Restart (-2,-3-4)
　　SW3    Select Preflow times
　　SW4    Select Postflow times
　　SW5    Selects Tip Saver (-1)  & Off the Plate (-2).  Neither of these are
　　implemented at this time (5-18-06).
　　SW8     Sets Pilot time (-1) and Remote Analog Current Control (-2).
　　SW9    OK to Move Delay. This is not implemented at this time (5-18-06).
　　GCM 2000 & 2010 Gas Control PCB  19X2219
　　LEDs
　　D13    E-STOP_PS    Power supply E-Stop is satisified.
　　D25    Plasma_Enable_PS    Plasma enable is on.
　　D2-D12, D18-D23  Indicates signal sent to Solenoid drive circuit to turn on
　　Solenoid.  It does not necessarily mean the solenoid is on.
　　It’s fuse could be open, the solenoid defective or an open    
　　connection could prevent the solenoid being on.     
　　Unfortunately diode numbers don’t match SOL numbers but on the PCB each of the solenoid drive signal LEDs are directly under the zero crossing isolation IC and the Triac for each SOL.  The zero crossing isolation IC’s U # is the same as the SOL #. The triac’s Q # is also same as the SOL #. For example, U1 and Q1 turn on SOL1.  The LED indicating SOL1 has been told to turn is D23 directly below U1.
　　Test Points     
　　All TPs referenced to TP1, 4 or 5 unless otherwise stated.  
　　TP1, 4, 5    Circuit Common (gnd)
　　TP2    120 VAC  HOT  (reference to TP3)
　　TP3    120 VAC RET  (reference to TP2)
　　TP6    +5 VDC supply
　　TP7    -5 VDC supply   (not on PCB after rev 19X2219 AE)
　　TP8    Plasma pressure signal   0-5VDC = 0-130 PSI
　　TP9    Solenoid Enable signal  *
　　TP10    BCD Backlight signal   
　　TP11    Mode Switch read signal   *
　　TP12    Gas Switch read signal   *
　　TP13    Solenoid Low Bank write signal  *
　　TP14    Solenoid High Bank write signal  *
　　TP15    BCD Low Byte read    *
　　TP16    BCD High Byte read   *
　　TP17    PCB Temperature signal (not used, removed after 19X2219 Rev AE)
　　These only in 19X2219 Rev AF and later.
　　TP18    Plasma Inlet Pressure signal (0-4.6V = 0-177 PSI)
　　TP19    Shield Inlet Pressure signal  (0-4.6V = 0-177 PSI)
　　*  These only used for factory troubleshooting, require logic analyzer to read.
　　Switches
　　SW1    Programming SW, both sections ON (up) for normal operation.
　　Power Supply PCB5  
　　LEDs
　　LED1    Coolant level.
　　LED2    Missing phase.
　　LED3    Input_NG
　　LED4    Chopper_Temp_Error
　　LED5    not connected
　　Test Points
　　TP0    Circuit common (gnd)
　　TP1    +5VDC supply
　　TP2    +15 VDC supply
　　TP3    -15 VDC supply
　　Power Supply Inverter Module
　　LEDs    
　　When signal /OCR to CCM is set (code 2-6), one of these LEDs will be latched on. In 150,200 & 300A supplies you can tell which inverter is causing the code by looking for the LED.
　　LED1    OCR_A    Primary over current inverter section A.
　　LED2    OCR_B    Primary over current inverter section B.
　　LED3      DCV_ERR   Voltage imbalance between capacitor banks A&B.