JRC JHS-770S - Page 127

Maintenance & Inspection
6-3
Unit Name Test Item Contents Results
ROM
･ ROM1 (Flash) read/write
･ ROM2 (EEP) read/write
OK :Normal
ROM1 NG :ROM1 error
ROM2 NG :ROM2 error
ROM12 NG :ROM1 & 2 error
RAM ･ RAM (SDRAM) read/write
OK :Normal
NG :Error
SIO ･ RS-485 line loop-back test
OK :Normal
NG :Error
MODEM
･ MODEM1 (M0-M1) loop-back test
･ MODEM2 (M1-M0) loop-back test
OK :Normal
MODEM1 NG :MODEM1 error
MODEM2 NG :MODEM2 error
MODEM12 NG :MODEM1 & 2 error
Loop
･ Loop1 (TX-RX) loop-back test
･ Loop2 (TX-WKR) loop-back test
OK :Normal
Loop1 NG :Loop1 error
Loop2 NG :Loop2 error
Loop12 NG :Loop1 & 2 error
PS(DC/DC) ･ DC/DC PWR output voltage check
OK :Normal
NG :Error
Transceiver
Printer ･ Print out test
- Check visually if printed out
correctly.
- After performed, this line on the
screen shows "DONE".
ROM
･ ROM1(Flash) read/write
･ ROM2(EEP) read/write
OK :Normal
ROM1 NG :ROM1 Error
ROM2 NG :ROM2 Error
ROM12 NG :Error in both
RAM ･ RAM(SDRAM) read/write
OK :Normal
NG :Error
SIO ･ RS-485 line loop-back test
OK :Normal
NG :Error
LCD&LED
･ Every pixel (dot) of the LCD and
ALM lamp display test
- Check visually if every dot and
the red and green ALM lamp
alternately work normally for 3
seconds.
- After performed, this line on the
screen shows "DONE".
Printer ･ Print out test
- Check visually if printed out
correctly.
- After performed, this line on the
screen shows "DONE".
Controller
Speaker ･ Sound test
- Check aurally if the 1500Hz tone
sounds correctly. After that, press
ENT on the popup screen to finish
this process.
- After performed, this line on the
screen shows "DONE".