Testing and Troubleshooting Troubleshooting T20229-G1 PCB on Card Cage Assembly
Page 8-10 MDE-3664B TRIND® Start-up, Service, and Parts Manual · June 2013
Gateway PCB (T20128-G1)
Normal Operation Abnormal Operation/Failure Cause/Action Required
PWR LED (CR8) constant on;
indicates 5 V su
pplied
No LED activity. Check TI/RFID Power Supply
PCB for 5 V output.
CPU LED (CR6) continuous rapid
pulse. Blinking CPU L
ED (CR6).
A dimly lit LED can also indicate
proper operation because the
blink rate has become so fast that
the LED appears dimmer than the
+5 VDC LED (CR8).
No LED activity (indicates
sof
tware not running).
Do the following:
• CRIND reset of Gateway may
be stalled.
Power TRIND down
and up and verify whether
problem is corrected.
• If not, replace Gateway PCB.
TX (CR4, CR9) and RX (CR5,
CR10)
at powe
r up display
asynchronous activity (date
transfer between Gateway and
CRIND), followed by synchronous
activity. TX LEDs indicate data to
CRIND; RX LEDs data from
CRIND.
Either or both RX LEDs on
steady
.
If there is serial connection
between CRIND and Gateway is
suspect, do the following:
• P250 on Gateway PCB.
• P258 on CRIND Logic Board.
• R20437-G01 Cable
Either or both RX LEDS blinking
and T
X
LEDs off indicates
Gateway not responding to
CRIND poll.
Do the following:
• Check address jump jack
setting
s on C
RIND and
Gateway boards for identical
settings (A=A; B=B).
• If address jump jack settings
are
cor
rect, replace Gateway
PCB.
Transmitter PCB (Q13579-01)
If tags are not being read, Transmitter PCB may be the cause. To verify that transmitter is
functioning, perform steps in “Tuning Antennas” on page7-5.
Normal Operation Abnormal Operation/Failure Cause/Action Required
3 LEDs (one green, two yellow) lit.
(If am
bient noise conditions allow,
can also hear repetitive clicks of
transmitter switchers firing).
• LED 1 (green) indicates 5 V
sup
p
lied.
• LED 2 (yellow) indicates Side A
side switch power @
18 V.
• LED 5 (yellow) indicates Side B
sw
itcher
power @ 18 V.
LED 1 is out or dim. Do the following:
• Check for +5 V power supply at
J6 (pin 1 = +22 V;
pin 2 = +5 V:
pin 3 = GND).
• If voltage low or non-existent,
unplug J6, cycle
power o
n
TRIND and recheck voltage
with J6 unplugged.
• If voltage is present and correct,
rep
l
ace Transmitter PCB.
LED 2 or 5 out (only one). Side A or B module failure.
Replace Tr
ansmitter PCB.
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