Sony SPP-S2720, Service Manual

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5
SPP-S2720
4. Automatic Hold Canceling Check
Note:
In this mode, this set is operating as follow.
• When
[HANDSET LOCATOR]
key is pressed, outputs the dial pulse 1 to the line substitute for key touch-tone.
• Close the line.
• Outputs single carrier (initial channel is 5ch) to antenna.
Procedure:
1. Take up the local handset on another telephone, and check that the
[IN USE]
LED lights up.
2. To shift the next step (Continuously Receiving Check), press the
[HANDSET LOCATOR]
key three times. (Each time the
[HANDSET LOCATOR]
key is pressed once, it switches the channel as 5ch
→
28ch
→
50ch)
5. Continuously Receiving Check
Note:
In this mode, this set is operating as follow.
• When
[HANDSET LOCATOR]
key is pressed, outputs the dial pulse 2 to the line substitute for key touch-tone.
• Close the line.
Procedure:
1. Prepare the handset, and turn the power on.
2. Press three keys of
[2]
,
[6]
, and
[ERASE]
on the handset simultaneously to enter the test mode.
3. Press the
[4]
key on the handset to activate the test mode D. (TX on, slave mode)
4. Press the
[1]
or
[3]
key on the handset to change the channel to 5ch. (
[1]
key: lowers the channel,
[3]
key: raises the channel)
5. Indicate the link condition (4 steps) by two LEDs of
[IN USE]
and
[NEW CALL]
as follows.
*) LQM: Link Quality Monitor
6. To change the channel of base unit, press the
[HANDSET LOCATOR]
key. Each time the
[HANDSET LOCATOR]
key is pressed, it
switches the channel as 5ch
→
28ch
→
50ch.
If press the
[HANDSET LOCATOR]
key once more, return to step 4 (Automatic Hold Canceling Check).
EASY CLEARING THE EEPROM MODE (Base unit only)
Note: When enter this mode, it works all operations automatically.
Procedure:
1. While shorting the TP327 and TP335 and pressing the
[HANDSET LOCATOR]
key, turn the power on.
2. When enter this mode, it start clearing the EEPROM (exclude the set upped parameters).
3
EEPROM clearing is complete, lights up all LEDs except the
[CHARGE]
LED.
4. To releasing this mode, disconnect the power.
Condition
[IN USE]
LED
[NEW CALL]
LED Value of LQM *
NG off off 21h to 3Fh
off lights on 11h to 20h
lights on off 09h to 10h
good lights on lights on 00h to 08h
Ver 1.1