harman/kardon Service Bulletin
Service bulletin # 9703 June 1997This is considered a Major Repair
To:All harman/kardon Service Centers
Models: FL8300
Subject: Dead unit, no display; Service upgrade
In the event you receive an FL8300 that is dead, and upon inspection R701 is damaged or an otherwise
open circuit, perform the necessary steps listed below:
Due to current surges, early models of the FL8300 could repeatedly damage R701 (either a 1 ohm resistor or
1.5A micro fuse depending on version). Along with the replacement of R701, the positive lead should be
relocated on C125 to suppress any future current surges.
Additionally, two capacitors, now designated as C907 & C908, (1uf/50v) should be added to the power supply
output pins on regulator IC108 & IC111 on a unit serviced for any reason; these will add stability to help prevent
oscillation.
PROCEDURE:
1) Replace R701 with micro-fuse H/K # 5508722221, this component is on PCB7.
2) A PCB trace should be cut on the C125 (2200 uf/25v) positive lead on the main circuit board and an insulated
jumper wire attached from that lead to the junction of D109/110. Additionally another insulated jumper will
need to replace the trace that was cut. (see drawing)
3) Add C907 & 908, 1uf/50v , H/K/ # 3479310971, one on each output pin to ground on regulators IC108 and
IC111. This is most easily accomplished by:
Soldering one 1uf cap to the jumpers 153 & 197. Observe polarity; J153 is ground.
Soldering one 1uf cap to the jumpers 185 & 186. Observe polarity; J186 is ground.
ModelSerial numberSerial numberActionCorrection
120V230V
FL8300IN0019-72213NOT REQUIREDR701 is damaged orReplace R701,
and belowan open circuitre-route positive connection
on C125,
Add C907/908
FL8300IN0019-72214NOT REQUIREDModified by factoryNONE REQUIRED
and above
harman/kardon Incorporated, 250 Crossways Park Dr. Woodbury, New York 11797 (516) 496-3400 |
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