Troubleshooting Guide - Panasonic SJ-MJ88 Service Manual

Main unit's keys
VOL+
VOL-
HOLD OFF
5. After all keys have been pressed and there is no abnormality, "T OOO " will
be displayed.
6. Perform below voltage check about the keys come under if it is not displayed
"T OOO ".
Main unit's keys
HOLD
VOL+
VOL-
Note:
Refer to "10. Printed Circuit Board Diagram" for the test points.
7. Remove the battery when you exit from this mode.

7. Troubleshooting Guide

LCD display position and letters
After the third key is pressed, the second digit displayed
will change from "
After the second key is pressed, the third digit displayed
will change from "
The first digit displayed will change from "
Check points
TP428
IC201 48pin
TP421
TP421
TP421
TP421
33
" to "O ".
" to "O ".
ON
0V
0V
1.13V
1.69V
0V
0.58V
" to "O ".
OFF
2.2V
2.2V
2.2V
2.2V
2.2V
2.2V