Harman Kardon SIGNATURE 2.0, Service Manual

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harman/kardon
Service Bulletin
Service bulletin # H/K9708 Dec. 1997 This is considered a Major Repair
To: All harman/kardon Service Centers
Models: Signature 2.0 Processor/Tuner
Subject: Complaints related to version 2.0 - 2.3 Software
In the event you receive a Signature 2.0 with one or more of the symptoms listed below, upgrade the
software to revision 2.4. Page 2 of this bulletin provides replacement instructions for IC U305.
Confirmation: Immediately after Power ON, the displays indicates the software revision. If the display
indicates a Rev number less than 2.4 (i.e. rev. 2.0 or 2.3) then replace IC U305.
Note: Internally, IC U305 will be marked with a label reading 1.0 (A misprint – it’s actually 2.0), 2.0 or 2.3.
SYMPTOMS APPLICABLE TO VERSION 2.0 ONLY:
•
When a mode other than Stereo is selected, and the system is muted, adjusting the volume will not UNMUTE the
system.
•
“VOL” text erroneously continues to be displayed when direct tuner frequency access is used.
•
Dolby Digital Mono is erroneously selectable from the front panel buttons when an analog source is selected.
•
Display flashes source/volume information when items are changed in the tuner menu.
•
When a preset is selected from the tuner menu, the manual RDS items are enabled/disabled incorrectly based on the
band of the selected preset (i.e. AM stations shouldn’t get manual RDS ID and Type).
•
When switching between 2 inputs in stereo mode, one analog and the other digital, the sound is muted erroneously
(however, changing modes will seem to restore the sound).
•
Remote Seek Up and Seek Down buttons do not work in tuner menu for frequency selection.
•
There is an erroneous level boost when switching into 6-ch direct mode.
•
When switching from Stereo mode to 6-ch direct mode, the Center and Surround speakers remain muted, as though still
in Stereo.
•
Tuning in Long Wave in European setup is in 9kHz increments, as opposed to the correct 1kHz increments; not North
America.
•
When exiting the 6-Ch direct Audio input, the mode erroneously stays in 6-Ch Direct mode. (i.e. when going from 6-Ch
Direct input to Analog #1 input, the mode stays in 6-Ch Direct…which is wrong. Note the difference between Audio input
and mode).
•
In the Speaker Setup menu, when switching selected speakers from on to off, or vice versa, those speaker outputs are
not immediately muted (i.e. sound continues to come from the Center speaker, even though the user just changed the
menu item to read “Center: None”.)
•
OSD timeout value allows a value of 00 which never times out.
•
When selecting a source, the unit may not select the correct input level value.
•
“Sensitive” remote button problem when cycling through the sources/modes from the menuing system. (e.g. one button
press results in two value changes; hit the button once and you jump from Analog 2 to Analog 4).
•
“High” indicator (signal level input) on the display from some CD players, some tracks, with subsequent distortion.
SYMPTOMS APPLICABLE TO VERSION 2.3 ONLY:
•
Random characters are generated at the bottom-right of the video output.
•
Center channel “Boost” function doesn’t boost the Center channel sound level.
•
“Sensitive” remote button problem when cycling through the Center/Surround effects. (e.g. one button press results in
two value changes).
Model Serial number
120V
Serial number
230V
Status Action
Signature 2.0 GT0003-01001
to
GT0003-02162
GT0006-01001
to
GT0006-01157
Has early software
version 2.0 or 2.3
Replace IC U305
with version 2.4
h/k part# A003-0020-4
Signature 2.0 GT0003-02163
and above
GT0006-01158
and above
Factory Installed
version 2.4
NONE REQUIRED
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