3
Amplifiers & Preamplifiers
EXP9
Zone Control
IR Input Jack
Zone A/V
Output Jacks
Video Gain
Adjustment Pins (PJ1)
Jumper
Zone PCB
Jumper
Shown in
0 dB Position
Jumper
Shown in
+3 dB Position
9
8. POWER Indicator LED. Indicates when power is applied to the EXP9. It stays on continuously even
when all zones are turned off (as long as AC power is applied to the plug-in power supply).
9. Video Gain Adjustment Jumpers (Internal. Refer to Fig. 3). As with the ZPR68-10, the video gain
of each zone on the EXP9 can be set to two levels, by the use of an internal jumper. With the jumper
on one pin only of PJ1, the video gain is unity (0 dB). When the jumper is inserted onto both pins of
PJ1, the video gain is increased by +3 dB.
You should use the +3 dB position only if you notice a reduction in picture contrast and brightness when
running long cable lengths (usually in excess of 150 feet).
Since the majority of applications will not require
additional gain, all EXP9's are shipped from the
factory with the jumper installed on one pin only
(0 dB).
To gain access to the jumpers you will need to
remove the top cover. Remove the five screws on
each end and the screw just under the Video jacks
of the Zone Outputs.
Do not remove the screws
that secure the cover plates of unused zone slots.
Carefully lift the cover off. When reassembling, be
sure to carefully align the holes in the top cover with
the jacks and the LEDs on all the PCB's before
pressing it down into place and replacing the screws.
CONNECTING THE EXP9 TO A ZPR68-10
To make the necessary con-
nections between the EXP9
Expander and a ZPR68-10, re-
fer to Fig. 4 and proceed as
follows:
1. Be sure the power supply
for each unit is unplugged
when making connec-
tions.
2. If you are adding
"XCARDs" to an existing
EXP9, add them first.
3. Locate the 26 and the 50-
conductor ribbon cables
supplied with the EXP9.
4. Plug the connectors of
each cable into the mating
connectors on the ZPR68-
10 and the EXP9.
CAUTION: The connec-
tors are keyed and will
mate in only one orienta-
tion. DO NOT FORCE.
Be sure the red stripe is to
the right when plugging in,
as shown in Fig.4.
Fig. 3
Video Gain Adjustment - Jumper Locations
Red Stripe
Red Stripe
50 Conductor
Ribbon Cable
(included)
26 Conductor
Ribbon Cable
(included)
ZPR68-10
EXP9 EXPANDER
VIDEO
AUDIO
L
R
ZONE IR INPUTS
ZONE OUTPUTS
ZONE IR OUTPUTS
7
8
9
10
11
12
®
SYLMAR, CA • MADE IN U.S.A.
POWER
POWER
SUPPLY
EXP9
NINE ZONE EXPANDER
+12V
GND
STATUS
IR IN
13
14
15
ZONE OUTPUTS
COMMON IR OUTPUTS
COMMON IR INDICATOR
VIDEO
AUDIO
L
R
VIDEO
AUDIO
L
R
ZONE CONTROL - IR INPUTS
1 2 3 4 5 6 7 8
COMMON IR LEVEL
H I
LO
SOURCE INPUTS
ZONE OUTPUTS
1 2 3 4 5 6 7 8
ZONE IR OUTPUTS
1
2
3
4
5
6
7
8
1
2
3
4
5
6
®
SYLMAR, CA • MADE IN U.S.A.
POWER
IR CONFIRM
CO
G
POWER
SUPPLY
ZPR68-10
SIX ZONE EIGHT SOURCE REMOTE PREAMP
+12V
GND
STATUS
IR IN
COM
PORT
SOURCE INPUTS
ZONE OUTPUTS
Fig. 4
Connecting the 26 & 50-Conductor Interface Ribbon Cables
