User Guide

PAMS
Technical Documentation
RAE-3
8. Troubleshooting
Page 8 – 79
Issue 1 06/01
2.23 BL8 related PDA UI problems
NOYES
OK?
OK?
CSP filters Z401 to Z404
Check, replace
Problem with BL8
Put BL8 module in test jig, connect B–to–B adapter JC4.
DO NOT connect the UI module or Flex yet.
DO NOT switch power on.
Check the resistances of display signals to the GND (1)
Resistance > 1 MOhm ?
Turn the power on.
Connect the Flex and the UI module.
Check LCDDA0 to LCDDA11 signals at JC4 pin header.
Pins nos.5, 7, 19, 20, 22, 23, 24, 26, 36, 37, 38, 39
Constant activity, signal as in Fig 73?
NO
if voltage = 0
Check DispClk signal at pin 2. , use a min 1MOhm probe
Signal as in Fig, 77?
YES
CSP filters Z401 to Z404
Check, replace
if voltage < 1MOhm
Check LLCLK signal at pin 40.
Signal as in Fig, 78?
Check FSP signal at pin 4.
Signal as in Fig, 79?
Check BackPWM signal at pin 31.
Signal as in Fig, 80?
Check LCDPWM signal at pin 10.
Signal as in Fig, 81?
CSP filters Z401 to Z404
Check, replace
OK?
YES
D300 or PWB faulty
Figure 65.