Current Consumption And Voltage Detectors Check - Casio CASSIOPEIA A-20 Service Manual & Parts List

Current Consumption and Voltage Detectors Check

Prepare the following items;
1 : Power supply 1 unit
2 : Ammeter
3 : Voltmeter
4 : AC adapter
5 : Charger
Current Consumption Check
Step Operation
Setting 1: Maximum of contrast dial.
2: Set the range of Amme-
ter to 1 A.
3: Vb = 2.6 ± 0.1 V
2
Boot the diagnostic pro-
gram
Main
ON, 3
Battery at
SLEEP
Main 5
Battery
ON
5 ON
1 unit
1 unit
1 unit
1 unit
Display (Wiring)
Ib
A
V
Vb
Alkaline battery terminal
** Main Menu **
0 AUTO MODE
1 DISPLAY
2 TOUCH PANEL
3 MEMORY
4 SERIAL
5 POWER CONTROL
6 AUDIO
7 Others
** Power Control **
1 40MHz
2 standby
3 sleep
Sleep mode
Currently CPU clock is 180MHz
Push on key to exit
** Main Menu **
0 AUTO MODE
1 DISPLAY
2 TOUCH PANEL
3 MEMORY
4 SERIAL
5 POWER CONTROL
6 AUDIO
7 Others
— 50 —
Connect the items as
shown.
-
Do not load the backup
battery.
A-20
+
To boot the diagnostic, re-
fer to page 43.
Current consumption at
SLEEP.
Measure the current.
Ib = 50 mA or under.
Current consumption at
ON.
Measure the current.
Ib = 650 mA or under.
Note