Instruction manual

3-6 / Service ControlWaveLP
3.2 TROUBLESHOOTING TIPS
3.2.1 Power Supply/Sequencer Board (PSSB) Voltage Checks
Bulk power (+10.6 to +30 Vdc) is supplied to PSSB board connector TB2 (TB2-1 = +Bulk
value & TB2-2 = Ground). The PSSB Board provides +5V (VCC), -12V and +12V to the
system via PSSB Board connector P1 (FMI/OB Board Connector P9). Figure 3-5 provides
the measurement locations to test Bulk, VCC and system voltages.
Check the supplies on the PSSB Board as follows:
• +5V (VCC Supply) - measure at TP6 (GND) & TP3 (+5V) = +4.95V to +5.05V.
• +12V (System Supply) - measure at TP6 (GND) & TP4 (+12V) = +11.4V to +12.6V.
• -12V (System Supply) - measure at TP6 (GND) & TP5 (-12V) = -11.4V to -12.6V.
• Input Supply - measure between TP2 (VIN-) and TP1 (VIN+) = Bulk up to 30 (VDC).
The input supply is considered good if the voltage is higher than the Power Fail (OFF) Trip
Point, i.e., 10.9V for 12V systems or 22.3V for 24V systems.
Figure 3-5 - PSSB Board Wiring and Test Points
3.2.2 LED Checks
The FMI/OB Board contains 43 LEDs. LED designation and function are provided in Table
3-1.
Table 3-1 - FMI/OB Board LED Assignment
Name Function
On
Operation
Name Function
On
Operation
CR33 DI1 Data High CR55 DO5 Data High
CR34 DI2 Data High CR56 DO4 Data High
CR35 DI3 Data High CR95 HSC2 Data High
CR36 DI4 Data High CR96 HSC1 Data High
CR37 DI5 Data High CR97 HSC4 Data High
CR38 DI6 Data High CR98 HSC3 Data High
CR39 DI7 Data High CR110 STATUS 6 Firmware Defined