Cooper Wheelock SAFEPATH SPB-160, Инструкция по установке, испытаниям, эксплуатации и техническому обслуживанию

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Chapter 8: Troubleshooting
Series SPB Audio Boosters Manual, Revision A
8-6
8.2.3 Procedure C
If the green AC LED is “OFF,” the yellow TROUBLE LED is “ON,” and D51, AC TRB LED is
“ON,” the AC sensing circuit on connected to TB1 is not operating. An AC trouble condition
might be caused by:
AC input missing or low.
No AC voltage to the AC Monitor Circuit
Faulty internal wiring between the rectifier module and TB1 on the motherboard.
A faulty mother board.
Perform the following:
1. Check AC input.
2. Check fuse F1 on the mother board.
3. Check AC wiring between the power supply module (SPBPS) and TB1 on the mother
board. Figure 4-8.
4. If voltage is present, replace the PC board.
8.2.4 Procedure D
If the green AC LED is “ON,” the yellow TROUBLE LED is “ON,” and D79, AUX TRB LED is
“ON,” the 1/2W EOLR is missing from the AUX RET terminals when jumper JP8 is removed.
An Auxiliary Trouble condition might be caused by:
Jumper JP8 removed and no 1/2W EOLR on the AUX RET terminals.
A faulty motherboard.
Perform the following:
1. If the internal 10K Ohm resistor is desired, replace the jumper JP8.
2. If a value other than 10K Ohms is desired for a 1/2W EOLR, install the 1/2W EOLR on
the AUX RET terminals.
3. Replace the motherboard.
8.2.5 Procedure E
If the green AC LED is “ON,” the yellow TROUBLE LED is “ON,” D77 AMP TRB LED is
“ON.” Amplifier section is defective. An amplifier trouble condition may be caused by:
Missing jumpers on J1 or J1A on the SPB-160 or J1B on the SPB-80/4.
Defective amplifier
Amplifier Supervision tone missing
Perform the following:
Check jumpers J1, J1A, and J1B.
Replace the Audio Booster mother board.