ADP 303 (serv.man3) - Harman Kardon Audio User Guide / Operation Manual. Page 11

Installation & Setup 

Although AV receivers that have both pre-
out/main-in jacks for all five surround
channels as well as a subwoofer output
were not designed for Dolby Digital
applications, you may use them with the
ADP303 by using the following steps:

1. Connect the AC-3 RF output of a com-
patible LV player to the ADP303 AC-3 RF
In Jack 

¡

.

2. Connect the optical or coax AC-3 out-
put of a DSS, DVD player or HDTV receiv-
er to the respective input jack 

™£

on

the ADP303.

3. Connect the Line Audio out from the
Laser Disc player to the LD audio input
on the receiver.

4. After making certain that the power to
your receiver is turned off, remove any
jumpers that connect the Pre-out to
Main-In jacks on the rear of your AV
receiver.

5. Connect the Pre-Out jacks on the
receiver to the respective Line Input Jacks

¢

(i.e., left to left, center to center, etc.)

of the ADP303.

6. Connect the sub out jack on the
receiver to the Subwoofer input jack on
the ADP303.

10

LINE IN

L            R

SURROUND

SUB

WOOFER

CENTER

L            R

AC-3

DIGITAL IN

OPT

MODEL NO.: ADP303
HARMAN KARDON
NORTHRIDGE
CALIFORNIA, USA
MADE IN JAPAN

AC-3

DIGITAL IN

COAX

AC-3
RF IN

FRONT SPK.

LARGE

SMALL

SURR. SPK.

CENTER SPK

SUB. W SPK

IN

OUT

LARGE

NON

SMALL LARGE

NON

SMALL

OFF

ON

AC-3 Data

AC-3 

RF Output

Line Audio Out

1

2

L

R

L            R

SURROUND

L            R

FRONT

L            R

LD

AUDIO IN

SUB

WOOFER

OUT

CENTER

AC OUTLET

UNSWITCHED

7. Connect the Line Out 

∞

jacks of the

ADP303 to the Main-In jacks on the rear
of your receiver. 

8. Connect the ADP303 Subwoofer output
jack to a powered subwoofer or a sub-
woofer amplifier.

9. Set the Speaker mode switches

§¶•ª

to their proper positions

based on the type of speakers in use.

10. Using the small Allen wrench tool
supplied with the ADP303, carefully
remove the cover panel for the Level
Trim Controls 

˙

. Set the cover aside so

that you may replace it later.

11. Turn on the power to both the
ADP303 and the AV receiver.

12. Select one of the three digital inputs
on the ADP303. 

∂

.

13. Set the Main Volume Control 

î

on

the ADP303 to the fully clockwise (lowest
volume) position.

14. Press the Test button 

ƒ

and hold it

for a few seconds. This will start the test
tone sequence. Raise the volume on the
ADP303 

î

until you hear the test signal

at a level slightly above normal volume.

Note that a test signal noise will be heard
from the speakers. Verify that the test sig-
nal circulates in a clockwise direction,

stopping for five seconds at each speaker.
If the sound is heard out of order, (i.e.,
moving from right to left, or appearing
out of order), turn the unit off and check
the connection from the ADP303 output
jacks to the inputs of your audio power
amplifiers. 

15. Listen to the sound as it moves
between the speakers. Ideally, the output
from each speaker should be equal. If the
output is NOT equal change the level by
carefully turning the Output Level Trim
Control 

˙

for the speaker that needs

adjustment.

NOTE: If you have trouble getting suffi-
cient output level from the ADP303 trim
controls increase the master volume level
using the ADP303 volume control 

î

. If

the volume level is too loud reduce the
level of the ADP303 master volume 

î

.

16. When you have completed the adjust-
ments, press the “Test” 

ƒ

button once

to stop the Test Tone.

17. Carefully replace the cover for the
Level Trim Controls.

18. When listening to a Dolby Digital
source use the volume control on the
ADP303 

î

. For all other lsitening set the

ADP303 to BYPASS 

ç

,or turn it off. Use

the A/V Receiver’s volume control for all
other (non-Dolby Digital) modes.

24093_ADP 303 Eng.  27/02/1998 10:34  Side 11