Specifications

SQ: 1-14
RS3: Service Quick Reference Guide
Troubleshooting
Console Power-Up Tests (continued)
Item DefinitionTest
PeerWay Jabber Halt A circuit on the card is i ntended to keep a faulty
node from transmitting too long on the
PeerWay. If this test indicates a fault, the card
may operate, but should be replaced as soon
as possible.
Local Loop Back This is a test of the console ability to hear its
own echo through the PeerWay system. If a
failure is indicated here, this indicates that the
console is not working on one or both
PeerWays. The Tap Box could be faulty, drop
cables could be disconnected, or the PeerWay
Interface card could be bad.
RAM Test #1 This is a data test of the RAM on the card. The
card should be replaced if a fault is indicated.
RAM Test #2 This is an addressing test of the RAM. The
card should be replaced if a fault is indicated.
Register Check This is a check of the several chips on the
card. If this test indicates a fault, the card
should be replaced.
Power Supply +5 V and
+12 V
A voltage sense circuit is read and if the +5 or
+12 volt supply on the power supply card is not
in tolerance, the voltage will be backlit. The
power supply should be replaced.
A: +30 and
B: +30
The voltage sense on the incoming DC bus is
monitored and, if one of them is below
approximately 18 volts, the indication will show
a fault. However, many consoles use only one
DC bus for power so the card fault will not
indicate “FAILED”.
Printer NVRAM Test A checksum i s run on the data in NVRAM. If
the c hecksum is incorrect, the test will indicate
a fault. The system will run if this is showing a
fault, but some of the c onsole c onfiguration
could be c orrupt. The online NVRAM
checksum test should also be checked on the
Menu Confidence Test screen.
Periodic Interrupt This is a test of the interrupt system generated
off the clock. If this test indicates a fault, the
card should be replaced.
(continued on next page)