User Guide

PAMS
Technical Documentation
NHD–4
Disassembly & Troubleshooting
Page 11
Original 11/97
Troubleshooting Diagram; Flash Programming, part 2
D706 pin 10
XSYS_RESET +3V after
power on?
15.36MHz at
D706 pin 69
D706 pin8/MD2
and pin9/STBY are
+3V ?
D706 pin 43/
XPWROFF has 0V to +3V
pulses after power
YES
D706 pin 77
/IRQ0 +3V after
power on?
D706 pin 4
/XMCU_WR +3V
after pwr on?
Check clock
Check these
two pins for
Change D706
Check D704 and
Check D706
Check all soldered joints
The data and address signals must have
a clear difference between low (0 V)
and high (+3V)
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
2
YES
Check D704 and D706 for
short/open pins, if pins look
OK change D704 if problem
continues change D706
signal in N700
and D704
shorts and
opens
ON ?
D706 pin 11
/NMI 0V after
power on?
YES
NO
D706 for shorts
and opens. If OK
change D706
Check D704 and
D706 for shorts
and opens. If OK
change D706
?