DOWNLOAD Harman Kardon SIGNATURE 2.0 (serv.man8) Service Manual ↓ Size: 21.45 KB | Pages: 2 in PDF or view online for FREE

harman/kardon Incorporated

250 Crossways Park Dr.  Woodbury, New York  11797  (516) 496-3400

1

Service bulletin # H/K9708   Dec. 1997

Warranty labor rate: MINOR repair

 To:

All harman/kardon Service Centers

 Models:  Signature 2.0 Processor/Tuner

 Subject: Complaints related to version 2.0

 - 2.3

 Software

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.

•

 

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 

in

correctly based on the

band of the selected preset

 (i.e. AM stations shouldn’t get manual RDS ID and Type)

.

•

 

When s

witching 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 a

n 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 Euro

pean

 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 allow

s

 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.

•

 

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).

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

harman/kardon Incorporated

250 Crossways Park Dr.  Woodbury, New York  11797  (516) 496-3400

2

 

2.0

Software (IC U305) Replacement Instructions

Before replacing the software in the SIGNATURE 2.0 Processor, confirm the Software revision in the unit. To
check, plug the unit in and turn it ON.  The display will  read “Ver __.__”.  Make sure the version you are
replacing is a higher number than what’s on the display.

CAUTION: IC U305 EPROM IS AN ELECTROSTATICALLY SENSITIVE DEVICE AND CAN BE DAMAGED
BY CARELESS HANDLING; YOU MUST FOLLOW PROPER STATIC CONTROL PROCEDURES TO
PREVENT DAMAGE TO THE DEVICE.

1.  Confirm the unit is unplugged and OFF.
2.  Remove the 7 top cover screws. There are 2 on each side and 3 on the upper portion of the back panel.
3.  Remove the top cover; slide it towards the back of the unit about an inch and lift it off from the back first.
4.  Locate the video board directly behind the video jacks. Unplug the ribbon cable marked “CONTROL” on the

circuit board under the ribbon.  Unplug the green power supply cable marked “PWR”; apply only upward
force to remove it.

5.  Locate and remove the (4) screws and (1) nut holding the video board on. Two screws are located between

the “COMPOSITE VIDEO” RCA jacks on the back panel.  Two screws, with washers, are located on either
lower side of the “S VIDEO” jacks on the back panel. The (1) nut is located on the inside corner of the
printed circuit board next to capacitor C504.

6.  Remove the video board by lifting the edge of the circuit board that has the connectors on it (CONTROL

and PWR) up and out of the way of the power supply capacitors before complete removal.

7.  The software IC (U305) should be visible at this point.  Find it on the CPU circuit board under the video

board, plugged into a 32 pin IC socket marked U305. You may need to move the 10 conductor ribbon cable
aside to read the locator number; there is also a label on the IC stating the software version. (On one side
of the IC there is a ribbon connector, on the other side of the IC is another device - MS6264L).

8.  Apply a “L” shaped pick or jewelers flat blade screwdriver between the IC (U305) and socket at the notched

end. Pry the end of the IC up enough to grab it and carefully lift straight up without further bending the pins
while you complete the extraction.

9.  Test fit the new IC (h/k part# A003-0020-4). The legs usually need to be bent inward. Do this by placing

one side of the IC legs against the edge of a table to bend all of them at the same time. Do this on both
sides just enough for the IC to fit properly into the socket.

10. Position the IC so the notch faces towards the transformers. Line up the legs into the socket and press

down hard enough to seat the IC into the socket. Look at the legs on both sides of the IC and make sure
there are not bent or misaligned.

11. Reinstall the video board in the same manner it was removed as in step 5, and reinstall the screws in their

respective locations.

12. Plug the ribbon cable into the connector marked “CONTROL” and the green power cable into the connector

marked “PWR”.

13. Replace the top cover in the same manner it was removed  in step 2, and reinstall the 7 screws. Tighten

the rear panel screws first.

14. You must do a reset for the new software to be enabled.  Make sure the On/Off button is in the OFF

position. Plug the unit into an AC outlet. While pressing the SOURCE and MUTE buttons down at the same
time, turn the On/Off button to the ON position. At this moment, the lower line of the display must read
“Initialized”.  You may then release the buttons.