IR Receivers & Modems
3
Serial
Links
MODEL MS455
455 kHz IR MODULATOR
INPUT
GND
GND
+12V
+12V
455 kHz
OUTPUT
S1 S2
40 kHz
OUTPUT
1 2 3 4
ON
S3 S4
SYLMAR, CA Made in USA
MODEL MS455
OUT
V
IR
RCVR
PWR
G
S
X
OUT
V
IR
RCVR
PWR
G
S
283-00
Emitter
283-00
Emitter
Satellite Receiver
CD Changer
Cassette DecK
490-00
Series
Micro Link™
IR Receivers
3-Wire
Cable
OUT
GND
+12V
Red
Stripe
291-10 or -80
IR Receiver
291-455
455 kHz IR Receiver
MAIN ROOM, EQUIPMENT AREA, ETC.
REMOTE ROOM 2
REMOTE ROOM 3
3-Conductor
Room-to-
Room Cables
(Home Runs
to the MS455)
789-44
Connecting Block
789-44
CONNECTING BLOCK
PWR
+12VDC
GND
STATUS
SIGNAL
EMITTERS
IR
RCVR
®
283SH
Emitter
120 V AC
(Unswitched)
Shielded
Lead
283-00
Emitter
40 Khz Controlled
Components
SMART PAD
™
Key Pad Series
GND
OUT
+12V
782-00
Power Supply
7 Foot Quick
Connect Cable
CB12
Connecting Blocks
X
Do not
plug in
a power
supply in
this case.
X
455 kHz IR Controlled
AV Receiver, Preamp, etc.
VCR
LD Player
455 kHz
IR Remote
40 kHz
IR Remote
Fig. 3
Multi-Room Repeater System
TROUBLE SHOOTING
1. The 291-455 can be affected by various sources of IR and EM interference, such as the following:
• Compact Fluorescent, Neon or Halogen lights, Neon Art, and light dimmers.
• Direct or reflected sunlight.
• Infrared security sensors (active types).
• RF radiation from TV sets that may be close to the 291-455 IR Receiver.
In the presence of such interference, you may experience a reduction in range between the handheld
remote control and the 291-455, or complete in-operation of the controlled unit.
2. To improve performance, you need to confirm the source of the interference. Do this by temporarily
turning off TV sets, etc., moving the 291-455 from sunlight exposure, turning off all lights, light
dimmers, Infrared security systems, etc. Then check for correct operation.
When you have isolated the interfering source, it will be necessary to move either it or the 291-455 IR
Receiver to improve operation.
3. If the red Talk-Back LED on the 291-455 does not blink when you are sending IR commands from a
remote control, check the following:
• Make sure the power supply is plugged securely into a live 120V AC wall outlet.
• Be sure the V, G and S terminals on the CB12 are correctly connected to the resp12V, GND
and INPUT terminals on the MS455.
• Check to see that the emitter you are using is good, by substituting a known good emitter.
• The Model 283SH Emitter will flash when a remote signal is sent, if the system is operating correctly.
• Be sure the DIP switches on the MS455 are set correctly. See the MS455 instructions for details.
4. If you are sure the emitter is OK, but the component does not respond, reposition the emitter. It may
not be located directly over the component’s infrared receiving "window". Consult the owner's manual
of the unit or the manufacturer for the exact location of the infrared "window".
291-455
7-17-97
