Service Bulletin H/K9901 - Harman Kardon FL8550 Service Manual

harman/kardon
Service bulletin # H/K9901 Rev1 November 2002
To: All harman/kardon Service Centers
Models: FL8350/FL8550
Subject: "No disc" reading in display
When a CD is in the carousel at the play position, Infra red light emitted by IR LED D3 is reflected onto IR Photo
sensor D2. D3 and D2 are on the PCB located underneath the carousel. When the amount of IR light received
by D2 is insufficient, D2 will not saturate and the display will read "No disc".
In the event you receive an FL8350 or FL8550 with the complaint: Display reads "No disc" but a disc is in
the tray, perform the modification as listed below:
1) Lay the unit on a padded surface.
2) Remove the (7) Black Philips screws holding the Top Cover on; remove cover.
3) Lay unit on its side and remove (5) Black screws on bottom which hold front panel to chassis.
4) Lay unit upright, remove (2) Black screws at top front section holding front panel to the front tray retainer brackets.
5) Pull front panel away, cut plastic cable ties if necessary, and lay the front panel face down on the table.
6) Remove (4) tray retainer brackets, (1) Plated screw each. (Bracket on left side may have a ground terminal).
7) Pull the carousel tray up and out of the unit; turn upside-down to expose the sensor board.
8) Remove the (2) Plated screws holding the sensor board to tray.
9) Lift the board and unplug either molex connector CN1 or CN2 to be able to turn board upside-down.
10) Locate R1 and change from a 470
11) Locate R2 and change from a 750
Alternately, the two above parts may just be "swapped", as this will result in the correct values.
12) Locate D3 and replace with new infra-red LED - h/k part# 3100-204000-002.
REASSEMBLY:
13) Replace sensor board, screws, and CN1 or CN2 connectors.
14) Turn the carousel tray over and replace back in the track; tray must be positioned all the way at the rear of the unit.
When placed correctly, tray should not glide back & forth on the track.
15) Replace and attach the (4) tray retainer brackets with single screws - ground wire (if present) is re-attached to left
front bracket.
16) Replace the front panel, both with the (5) bottom screws and the (2) screws at the top. Note: Make sure any
washers that were present between the various brackets and the chassis are reinstalled. Replace cable ties as
necessary.
17) Test the player by inserting one or more compact discs, assure unit reads discs in all slots.
18) Locate MCU board, which is mounted vertically on right side of unit. Connect DC Multimeter to Pin 8 (gray wire) of
CN705 (10 pin plug, labeled 'DSNS'), and Pin 2 (red wire) of CN701 (2 pin plug). While playing a disc, DC Multimeter
reading must be between 4.7 V and 5.0 V.
19) Replace top cover and screws.
Model Serial number (120V)
FL8350 YC0001-01001
YC0001-37014
FL8550 YC0003-01001
YC0003-08666
FL8350 YC0001-37015
FL8550 YC0003-08667
Ω to a 750 Ω resistor - h/k part# 1007-501316-000.
Ω to a 470 Ω resistor - h/k part# 1004-701316-000.
Serial number (230V)
YC0002-01001
to
YC0002-16673
YC0004-01001
to
YC0004-04884
YC0002-16674
and above
YC0004-04885
and above
Service Bulletin
to Needs Modification
to
and above Changed by factory
and above
Warranty Labor Rate: Major Repair
Status
Replace:
R1 with 750 Ω
R2 with 470 Ω
NONE REQUIRED
Action
D3
9