JBL On Air Control 2.4G, Service Manual

Page: 13 / 13

JBL Incorporated 250 Crossways Park Dr. Woodbury, New York 11797 (516) 496-3400
Service Bulletin
Service bulletin # JBL2007-01 May 2007 Warranty labor rate: MINOR repair
To: All JBL Service Centers
Model: On Air
™
Control 2.4G
Subject: Sensitivity, Short Standby Time
In the event you receive a Control 2.4G Wireless Powered Loudspeaker System with the following
complaint: “The unit goes into Standby mode too quickly, or does not turn back ON with very low
levels of music”, perform the following modification to increase the Standby time and Sensitivity.
Synopsis: Change four resistors in the Transmitter portion of the system. Note: RoHS-rated* de-soldering and
soldering equipment and material for SMD resistors will be required.
1) Remove the cover on the On Air
™
Control 2.4G Transmitter to expose the main PCB
2) Locate the four resistors R38,41,46 & 67 on the main PCB. (See illustrations)
•
Change R38, R41 from 9.1K to 3.3K SMD 603 size, JBL part# P3.3KGCT-ND
•
Change R46 from 510K to 2.2M SMD 603 size, JBL part# P2.2MGCT-ND
•
Change R67 from 680K to 2.2M SMD 603 size, JBL part# P2.2MGCT-ND
Model
Serial Number
120V
STATUS ACTION
On Air
™
Control 2.4G
ME2326-001001
to
ME2326-013000
Low sensitivity, short
standby interval
Change R38, R41 to 3.3K
Ω
Change R46, R67 to 2.2M
Ω
On Air
™
Control 2.4G
ME2326-013001
And above
Modified by Factory NONE REQUIRED
Change increases ATO sensitivity from 16mVRMS to 3.5mVRMS @ 1KHz Both inputs driven
Change increases time to turn-off after signal is removed from
≈
3.3 Minutes to
≈
9.66 Minutes after removing 0.5VRMS (Both inputs
driven)
* RoHS = Restriction Of Hazardous Substances
12