21
SPP-A2770
10.
TX Current Measurement
Setting:
Procedure: (Use the panel for normal set)
1. Connect equipments as the figure above.
2. In the test mode idling status, press the
[GREETING REC]
key to display “–C”, and press the
[REPEAT]
,
[DAY/TIME]
keys to set TX on and channel 28.
3. Check that the value of ammeter is 450 to 550 mA.
11.
Frequency Deviation Measurement
Setting:
Procedure:
1. Connect equipments as the figure above.
2. In the test mode idling status, press the
[GREETING REC]
key to display “–C”, and press the
[REPEAT]
,
[DAY/TIME]
keys to set TX on and channel 28.
3. Check that the value of frequency counter is 2440.464 to
2440.536 MHz.
+9 V
regulated dc
power supply
Base unit
TP201
TP202
–
+
A
+
–
frequency counter
pick-up coil
antenna
HANDSET
•
Make the set in the test mode. (See page 16)
1.
Power Failure Test
Procedure:
1. In the test mode idling status, press the
[1]
key to display
“TEST A”.
2. Check that the key back light on the handset lights up when
connect between TP105 and TP104 (GND) on the HAND
MAIN board.
2.
Low Battery Test
Setting:
Procedure:
1. Connect equipments as the figure above.
2. In the “TEST A” status, check that the LCD back light on the
handset lights up when change the voltage of regulated dc
power supply to 3.2 V.
3.
Charge Detection and Current Control Test
Setting:
Procedure:
1. Connect equipments as the figure above.
2. In the “TEST A” status, turn the power on of the regulated dc
power supply (+5 V) to start charging.
3. Check that the level of digital voltmeter 1 (voltage of TP32)
changes from “L” to “H”.
4. Check that the value of digital voltmeter 2 (voltage of 10
Ω
resistor) is 110 to 150 mV.
5. Press the
[*]
key to start quick charge.
6. Check that the value of digital voltmeter 2 (voltage of 10
Ω
resistor) is 1.2 to 1.4 V.
7. Disconnect the regulated dc power supply.
+3.8 V
regulated dc
power supply
Handset
TP101
TP102 (GND)
–
+
Handset
digital voltmeter 1
+5 V (power off)
+
–
+
TP32
TP102 (GND)
charge terminal
+
charge terminal
–
–
regulated dc
power supply
10
Ω
digital voltmeter 2
+
–
Содержание SPP-A2770 - 2.4ghz Cordless Telephone
Страница 55: ...55 SPP A2770 MEMO ...