JBL N 26 (serv.man4) Service Manual / Technical Bulletin ▷ View online
Service Bulletin
Service Bulletin JBL2000-02 - March 2000
Warranty labor rate: MINOR repair
To:
All JBL Service Centers
Models: N26, N26AW
Subject: Distortion
In early versions of the N26 and N26AW loudspeaker, the crossover network PCB comes in contact with
the threaded metal inserts inside the enclosure. As a result, when an optional wall bracket is used, it may
short out two electrical points on the network. This results in distortion, and possibly the customer's
receiver or power amplifier shutting down due to low impedance.
In the event you receive an N26 or N26AW loudspeaker with the complaint “there’s distortion from
one or both of the loudspeakers, but only when I use a wall bracket”, perform the following
modification:
Disassemble the loudspeaker and add non-conductive washer(s) between the inserts and the network
PCB.
1) Remove the woofer, the dacron filler, and the crossover network.
2) Insert two fiber washers, JBL part# N26WASH, between the rear of the network PCB and the metallic
inserts at the rear of the enclosure.
3) Reassemble the loudspeaker.
Models
Serial number
Status
Action
N26
N26AW
ME0135-00000 to
ME0135-27028
ME0141-00000 to
ME0141-03542
Distortion when using wall
bracket
Add non-conductive washer(s)
between metal inserts and
crossover network PCB
JBL Incorporated 250 Crossways Park Dr. Woodbury, New York 11797 (516) 496-3400
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