Service manual

2-8 June 21,2004
DECODER NP88 FLEX
Troubleshooting
No Display or Bad Display on Power-Up
Check thesolder connection between the circuitboardand the Heat Seal Connector
of the LCD.
Figure 2-8. No Display Troubleshooting Flowchart,
FLEX Decoder
REPLACE
FAIL
OK
CHECK SIGNALS AT
µC
PINS 24-27,2PINS 24-27,29-52
REPLACE
µC
FAIL
REPLACE HEAT SEAL
CONNECTOR/LCD
ASSEMBLY
OK
NO DISPLAY ON
POWER-UP
SUPPORT MODULE
CHECK SUPPORT MODULE
U5 PIN 2 OR TSP3 FOR 3V