Signal-Tech PHX Series Troubleshooting Manual

PHX(F) Series Troubleshooting Guide
PHX(F) Series 120-277VAC
Identify the Sign Problem:
Follow the owchart to diagnose the symptoms
Tools Needed:
Philips head screwdriver
Multi-meter
Description of Normal Operation for the Sign's Internal Power Supply
Diagnostic LEDs are included on the internal power supply to aid in verifying that input power is present and is being transferred to
the sign face through the output connectors.
V Out LED
This LED illuminates Green when 120-277VAC power is applied to the internal power supply's input power pigtail.
Note: The transformer on the power supply converts 120-277VAC power to +12V.
Output Connectors
These connectors transfer power from the internal power supply to the sign face to illuminate the individual message(s).
For signs with one message and one power supply, the V Out LED should illuminate green when the message is powered. For signs with
multiple message and/or multiple power supplies, the V Out LED on each power supply of the energized message should illuminate.
Note: A longer single message may require multiple power supplies to illuminate the entire message.
Neutral
120-277VAC
Line
Power Supply
Output Connector
Power Supply
Dark band or area
when illuminated
Single Message with Multiple Power Supply Example
Power Interconnect
(Factory installed) Power Supply
V Out LED Output Connector
Power Interconnect
(Factory installed)
Output Power to Sign Face
Pg Pg
A message is lit
2 3
that shouldn't be
Always turn off the power to the sign prior to opening the cabinet.
Disconnect the power wires going to the sign.
Note: Clear all metal
chips created by drilling
into sign cabinet.
Neutral (White Wire)
V Out LED
Power Supply
Last Update: 07/19/18
Pg
The display is The entire display
4
ickering is out
Note: Do not over- Note: Make appropriate wiring
tighten fasteners or connections per local codes.
distort back panel.
SPST
On/Off Switch
Message A Lead
(Black Wire)
Input Power
Pigtail
Input Power Pigtail
Sign Face
Pg
5