User Guide

PAMS
Technical Documentation
RAE-3
8. Troubleshooting
Page 8 – 76
Issue 1 06/01
NOYES
OK?
OK?
NO
Check, replace
OK?
CSP filters Z401 to Z404
Check, replace
Problem with QWERTY
keypad _1
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 resistance of Row and Col signals to GND.1)
Resistance > 1 MOhm ?
Z401 to Z404
DO NOT connect the UI module or Flex yet.
Turn power on.
Check Col signals at pins:
49, 62, 60, 59, 54, 55, 56, 61, 53, 51
Voltage around 2.8V ?
NO
if voltage = 0
Check Row signals at pins:
50, 69, 67, 65, 64, 63, 57, 68, 58, 52
Voltage around 0 V ?
CSP filters Z401 to Z404
Check, replace
if voltage >0
YES
Eliminate short circuits if
YES
Continue at next diagram
Note 1) Pins 49–65 and
66–69 against pin 70 (gnd).
Refer to table 6.
Figure 63.