Sharp SL-5500 Service Manual page 53

PC-UM10M
CURRENT CONSUMPTION CHECK
No. Operating procedure
1 Check that the SL-5500 battery replacement
switch is locked.
2 As shown in Fig-1, supply power to the SL-
5500. V1 = 3.8V
Boot the diag mode (SW1~SW3 = ON)
3 Touch the [Page up],
Select No. 1 Idle mode of DIAG MENU (2/3)
4 Press [F/L] key of the SL-5500.
5 Press [on/off] key once to turn off the power.
6 Supply power of 3.2V to the backup battery
side. V2 = 3.2V (V1 = 0V (SW1 = OFF)),
(SW3 = OFF)
CP601
SL-5500
GND
Main+
GND
B/U+
GND
Main battery supply voltage = 3.8V
Backup battery supply voltage = 3.2V
(Note for measurement of currents of backup and main batteries.)
• When measuring the current, short CP601 and GND.
CHECK PAD
Bottom cabinet
Inside of Battery
Compartment Lid
NORMAL OPERATION (LOCK)
REPLACE BATTERY (RELEASE)
DIAG MENU (1/3)
Idle mode
DIAG MENU (1/3)
F/L ON
(turn off)
SW3
ON/OFF/F/L
A1
V1 3.8V
Constant voltage power
SW1
for MAIN
B/U
A2
V2 3.2V
Constant voltage power
SW2
for B/U
B/U off (CP601)
32k OUT
RESET
Main +
B/U +
PA13
PA12
GND
SL-5500 DIAGNOSTICS AND CHECK ITEMS
Display
ON current (A1) = 160mA or less
F/L current (A1) = 550mA or less
OFF current (A1) = 1mA ~ 2.75mA
B/U current (A2) = 1mA ~ 2.5mA
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Check item