BrightSign HD600 Hardware Guide - Manual (Page 16)

BrightSign HD600
This information applies to a product under development. Its characteristics and specifications are subject to change without notice. Roku assumes no
obligation regarding future manufacturing unless otherwise agreed to in writing.
www.rokulabs.com © Roku 2006
(2) Power LED comes on, no serial port output
Check U36
Check U26
Check U27, L59, D18
Is there 1.2V DC
at TP42?
Is there 27MHz at
R50?
Is RESET_L high at
R197 after powerup?
No
No
No
Yes
Yes
No serial
port output
Is there 2.5V DC at
TP19?
Check U22, D11, L55 No
Yes
No
Check U23,
Check I2C bus for
shorts, Check
PNX1500 U18
Is SYS_RESET_L
high at R7 after
powerup?
Check U9 for
good program
and good
solder joints,
Yes