Backup Function Check - Panasonic JS-170FR Series Service Manual

3.4

Backup function check

1) Measurement of Ni-Cd battery charging current
Standard charging current
63mA±15%
Measurement shall be carried out after the jigs as shown below have been connected. (For reference)
Battery
2) Backup operation check
(2) Connect a CRT to the VGA connector and turn on the FCR power supply.
(3) Withdraw from the diagnostic screen. (Press Exit once and return to DOS prompt.)
C: >
(4) Execute the backup operation check program from DOS prompt.
C: >backup
(5) When ***** POWER OFF ***** is displayed at the CRT, turn off the AC power supply of the FCR.
(To turn off the AC power supply, the POWER switch is turned off or the AC plug is pulled out.)
(6) Confirm that c:> ***** POWER OFF ***** is displayed at the CRT.
(7) Press the ENTER key once from the keyboard. When the display shown below is presented at the CRT screen, turn on
the FCR power supply.
C:> ***** POWER OFF *****
Press any key to continue
3) Measurement of circuit voltages in backup mode
Measure the voltages specified below in the backup mode by the use of the Ni-Cd battery.
Item
+3V
+5V
+5VSB
4) Measurement of currents in system backup circuit
Measurement shall be carried out after the jigs as shown below have been connected. (For reference)
DC
power
supply
Measuring conditions
Battery voltage: 8.0V
A
V
Battery voltage
[ENTER] key input
Measuring point
CN26_8pin - TP6(GND)
CN26_18pin - TP6(GND)
CN26_1pin - TP6(GND)
Diode: 8A or above
A
V
Input voltage 8.0V
CN3
POWER unit
Standard [V]
+3.3V±0.16
+5.0V±0.25
+5.0V±0.25
CN3
POWER unit
3-3
Remarks
Standard current value
2.2A±15%