20
SPP-S2720
4.
Charge Current and CHARGE LED Test
Setting:
Procedure: (Use the panel for normal set)
1. Connect equipments as the figure above.
2. In the “TEST A” status, check that the value of digital voltme-
ter is 6.0 to 6.2 V and the
[CHARGE]
LED on the base unit
lights up.
5.
C-ID Input Level Measurement
Setting:
Procedure:
1. Connect equipments as the figure above.
2. In the test mode idling status, press the
[6]
key to display
“TEST F”.
3. Set the output level of audio analyzer to –17 dBm (1.2 kHz,
LPF=30 kHz ON).
4. Check that the value of audio analyzer is –15 to –21 dBm.
SECTION 5
ELECTRICAL ADJUSTMENTS
0 dBm = 0.775 V
BASE UNIT
•
Make the set in the test mode. (See page 14)
Note:
To perform the electrical adjustments (test mode), prepare the panel
(BASE CABINET (UPPER) ASSY) for SPP-A2780, and use it con-
necting the panel for SPP-A2780.
But the connector CN302 for panel connection is not mounted on the
BASE MAIN board in this set.
Therefore, in performing the electrical adjustments (test mode) the con-
nector CN302 must be additionally mounted, and it need not be re-
moved after use, as the patterns of the board could be damaged when
removing the connector. However, note that it may be a little difficult
to close the cabinet with the CN302 left mounted because of a narrow
internal space.
Further, additional mounting of the CN301 for the SPP-2780 panel
connection besides the CN302 enables the LCD display. Also, in this
case, the CN301 need not be removed after repair.
1.
Power Failure Test
Procedure:
1. In the test mode idling status, press the
[1]
key to display
“TEST A”.
2. Check that the
[NEW CALL]
LED on the base unit lights up
when connect between TP203 and TP306 (GND) on the BASE
MAIN board.
2.
Ring Detection Test
Procedure:
1. In the “TEST A” status, connect the base unit to telephone
line.
2. Check that the
[IN USE]
LED on the base unit lights up when
call the base unit.
3.
Line Closing of Parallel Connected Another Tele-
phone Detection (On Hook) Test
Procedure:
1. In the “TEST A” status, connect the base unit to telephone
line.
2. Connect this set and another telephone in parallel to one tele-
phone line.
3. Check that the
[NEW CALL]
LED on the base unit lights up
when you take up the receiver of another telephone.
Base unit
feeding bridge
Trunk
Line
Line
Input
TP101
TP102
TP413
TP306 (GND)
GND
Output
audio analyzer
1.2 kHz, –17 dBm
LPF: 30 kHz ON
Base unit
digital voltmeter
–
+
charge terminal
+
47
Ω
/1W
charge terminal
–
SPP-A2780 BASE KEY board
(in the panel)
15 pin
11 pin
CN703
CN702
CN302
CN301
SPP-S2720
BASE MAIN board
Содержание SPP-S2720
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