CD Player/Tuner Stereo SystemHARMONY
HARMONY SERVICE BULLETIN JBL9904
Service Bulletin JBL9904 - October 1999Warranty labor rate: MAJOR repair
To: All JBL Service Centers
Model: Harmony AM/FM, CD Compact Sound system
Subject: Weak FM Reception
In the event you receive a Harmony sound system with the complaint ?poor FM stereo reception?, and FM
reception does not improve by using the larger dipole-type FM antenna supplied with the unit, check the rear of
the unit and see if there is a ?LO/DX? switch. If there is no ?LO/DX? switch, then the main PCB should be
replaced as per the instructions below:
Note: It is very important that the various screws do not get mixed up and inserted in other locations upon
reassembly. Make note, or label each removed screw set, and keep them apart from other screw sets.
1)Unplugallcables&connectors;placetheunitonpaddedsurface.
2)Carefullyprythespeakergrilleoutofitsrecessandremove.
3)Attherearoftheunit,removethe(4)screwsholdingthetopcoveron.Twoaredirectlyunderneaththe
handle and two are near the center of the unit.
4)Slidethetopcoverstraightbackandofftheunit,exposingtheCDmechanism.
5)AtthefrontoftheunitdirectlybelowtheCDtray,removethetwoCDmountingscrews.
6)PulltheCDmechanismoutandawayfromtheunit.Lookingattherearoftheunit,therightsidewill
pull away first and ?pivot? around a thick wire cluster on the left side of the cabinet.
7)Unplugallconnectors;makenoteofcolorsandlocations-donotmixuponreassembly.
8)ToseparateCDassemblyfromMainPCB:
a) Remove the two lower, outermost screws from the small heatsink.
b) Remove the (4) silver-colored screws from the bottom of the PCB.
c) Remove the single screw from the RCA jack bracket.
d) Lift the CD mechanism off the PCB and carefully unplug the (4) remaining connectors.
9)ReplaceMainPCBwith:
120v version - JBL part# APE0199-002, 230v version - JBL part# APE0199-001
Older version MAIN PCBNewer version MAIN PCB
Board has ?LVM0199-001 REV B? Printed on itBoard has ?LVM0199-001 REV D? Printed on it
No external capacitors attached to PCB near IC2012 external capacitors attached to PCB near IC201
Diode D231 is an axial partDiode D231 is a SMD part
10)ReattachmainPCBtoCDassemblyandfollowalldisassemblyinstructionsinreverseorderuntilunitis
fully assembled.
11)ReattacheitherexternalFMantennasuppliedwiththeunit.Pluginthepowercord.
12)Testunitbypushing?AM/FM?buttononHarmonyoritsremotecontrol,thenpushthebutton for
one second and release for Harmony to begin tuner search for various stations.
13)Markthebottomoftheunit,underthebase,withaboldblackmarker-?JBL9904?.
ModelSerial Number 120VSerial Number 230VStatusAction
Replace Main PCB with
AC0022-01001AC0023-01001
JBL part#
HarmonytotoWeak FM reception
APE0199-02 (120V)
AC0022-13000*AC0023-135000*
APE0199-001 (230V)
AC0023-135001*
HarmonyAC0022-13001*New revision Main PCBNONE REQUIRED
and above
* Versions of the HarmonySoundsystemwiththe?LO/DX?switchattherearoftheunitarethelatestversion,andneedno
modification.
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ACEC
JBL
