Printronix p300 Maintenance Manual page 119

FROM SHEET 1
A C
Replace logic A
PCBA per para 5–44.
Press ON LINE switch
and observe indicator.
NO
ON LINE
indicator off
?
YES
Install original logic A
PCBA per para 5–44.
Replace logic B PCBA
per para 5–44.
Press ON LINE switch
and observe indicator.
NO
ON LINE
indicator off
?
YES
Refer to schematics
and troubleshoot
using standard
techniques. If problem
remains, contact
authorized distributor
service
representative.
Figure 4–5. ON LINE Indicator Not Illuminated (2 of 2)
P300/P600 Troubleshooting
FROM SHEET 1
indicator off
YES
Replace control panel
per para 5–19.
Return to
Normal operation
Press ON LINE switch
and observe indicator.
indicator off
YES
Refer to schematics
and troubleshoot
using standard
techniques. If problem
Return to
remains, contact
Normal operation
authorized distributor
service
representative.
B
NO
ON LINE
Replace power supply
PCBA per para 5–41.
?
Press ON LINE switch
and observe indicator.
NO
ON LINE
Normal operation
?
Return to
4–13