Service manual

3.3.5 Key Operation Error
Voltage at Pins 22 and 23 of IC102 during key operation
Pin No./Terminal name Pin 23/KEY1 Pin 22/KEY2
EXIT (SW101) ON 5V 3.65V
3
(SW102) ON 3.65V 5V
4
(SW103) ON 5V 1.6V
- (SW104) ON 5V 2.38V
+
(SW105) ON
1.69V 5V
SEL (SW106) ON 5V 0V
RESET (SW107) ON 0V 5V
Check voltages with operation keys.
NG
OK
Expected failure point
SW101-SW107, R10A-R10G, R10K, R10L or peripheral circuits
MPU operation error (See Item 3.4.8)
Confirm that the voltage at Pin 22 and 23 of IC102 on the MAIN PWB are
as specified in the table below when the operation key is pressed.
3-17