Technical data

Chapter 8: Troubleshooting
Series SPB Audio Boosters Manual, Revision A
8-2
When there are no trouble conditions detected on the Series SPB Audio Booster, the AC LED
and DC LED indicator always remains ON and the TROUBLE LED indicator always remains
OFF. When a trouble condition is detected, the AC LED indicator remains ON and the
TROUBLE LED indicator always remains ON.
Figures 8-1 and 8-2 show the location of all trouble location LED indicators within the Series
SPB Audio Booster panels. Table 8-1 cross-references the trouble location LED indicators on the
mother board to the proper troubleshooting procedure.
NOTE: When D73 TBL LED indicator is ON, indicating a panel Trouble, at least one of the other
yellow LED indicators is also ON, indicating the trouble location.
Table 8-1. Trouble LED Procedure Cross Reference
D73
LED
(Yellow)
Trouble Description
Troubleshooting
Procedure
D73 Main Trouble Indicator ------
D11 AC LED
“OFF”
No DC Power to the mother Board from the Power
Supply (SPBPS).
Procedure A
(section 8.2.1)
D49 BAT TRB Battery voltage is below 18.5 VDC or battery is
missing.
Procedure B
(section 8.2.2)
D51 AC TRB AC power input voltage missing from TB1. Procedure C
(section 8.2.3)
D79 AUX TRB External 1/2W EOLR missing when Jumper JP8 is
removed.
Procedure D,
(section 8.2.4)
D77 AMP TRB Amplifier failure or jumpers J1 and J1A (SPB160) or
J1B (SPB-80/4) are not installed incorrectly.
Procedure E
(section 8.2.5)
D78 EXP
SHORT
Expansion Circuit is Shorted Procedure F
(section 8.2.6)
D87 EXP OPEN Expansion Circuit is Open Procedure G
(section 8.2.7)
D100GF Ground Fault Trouble Procedure H
(section 8.2.8)
D25 AUD1
SHORT
Audio 1 Notification Appliance Circuit is Shorted Procedure I
(section 8.2.9)
D30 AUD1
OPEN
Audio 1 Notification Appliance Circuit is open Procedure J
(section 8.2.10)
D21 AUD2
SHORT
Audio 2 Notification Appliance Circuit is Shorted.
(SPB-160 Only)
Procedure K
(section 8.2.11)
D18 AUD2
OPEN
Audio 2 Notification Appliance Circuit is open.
(SPB-160 Only)
Procedure L
(section 8.2.12)
D56 STRB1
SHORT
Strobe Notification Appliance Circuit is shorted.
(SPB-80/4 Only)
Procedure M
(section 8.2.13)
D53 STRB1
OPEN
Strobe Notification Appliance Circuit is open.
(SPB-80/4 Only)
Procedure N
(section 8.2.14)
D67 STRB2
SHORT
Strobe Notification Appliance Circuit is shorted.
(SPB-80/4 Only)
Procedure O
(section 8.2.15)
D69 STRB2
OPEN
Strobe Notification Appliance Circuit is open.
(SPB-80/4 Only)
Procedure P
(section 8.2.16)
Before performing any of the following troubleshooting procedures, make sure
that you read, understand, and follow the preliminary troubleshooting information
at the beginning of this “troubleshooting” chapter.