Read JBL SB 400 (serv.man8) Technical Bulletin online
Service Bulletin
Service bulletin # JBL2014-001
Nov. 2014
400 AT LANT IC STREET STAMFORD, CT 06901 USA
• For preventive action, change FB810 to a 0Ω resistor on the back of the main board, as shown below.
•
If tweeter or amplifier is damaged: replace defect parts.
• Reassemble and test the unit.
IRIS code: (For service centers using IRIS code reporting)
Preventive action: Use the below IRIS codes to report this modification as a second defect, within the same repair
Conditions
Symptoms
Section (Area) Defect (cause)
Repair (Remedy)
Position
IRIS CODES:
2
After a while
After a while
516
No sound from
speaker
No sound from
speaker
DPR
Signal
processing
(digital)
Signal
processing
(digital)
Y
Wrong component /
module
Wrong component /
module
I
Modification requested
by manufacturer
Modification requested
by manufacturer
FB810
Unit repair: Use the below IRIS codes to report this
Conditions
Symptoms
Section
(Area)
(Area)
Defect (cause)
Repair (Remedy)
Position
IRIS CODES:
1
Constantly
Constantly
516
No sound from
speaker
No sound from
speaker
SPK (PWA)
Speaker
(Power amp
section)
Speaker
(Power amp
section)
N
Defective electrical
component / module
Defective electrical
component / module
A
Replacement
Replacement
FB810, Tweeter
(amplifier board)
(amplifier board)
