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33

A) Auto Disconnect activation time:
Some Telephone Company lines (fiber or cable) ON Hook and OFF Hook voltages are lower than conventional lines, which may
cause a malfunction of Auto Disconnect detection. To solve this problem, try changing the Auto Disconnect activation through
the procedures below. 

1) Press "MENU " key at standby Mode and "#" key.

  Note: The set must power on and be linked.

2) Press "9", "0", "0", "0","   " . 

3) Press "7","3","1". 

4) Then enter the below last digit; 

5) Back to "standby" mode automatically after step 4).

   You can hear beep sound which is a confirmation tone.

Service ready  
:7 3 1

Service ready  
:

LCD (H/S)

last digit

"0"

Auto disconnect & CPC

: enable

࡮࡮࡮㨇default㨉

(*1)

(*1)

Auto disconnect & CPC

: disable

(*2)

"1"

"2"

Auto disconnect : enable

CPC : disable

Note:
(*1)  Both Auto Disconnect and CPC don't detect for the first 2 seconds.
(*2)  If the "Disable" is selected, even if the parallel-connected telephone is OFF HOOK, 
        the line isn't disconnected. 

CLEAR

BACK

34

B) Vox level: 
 It makes easier to detect a small voice (caller) by raising the sensitivity of VOX level. Therefore, the recording of TAM is not
turned off during detection.

1) ~ 2) are same as (A). 

3) Press "5","1","1". 

4)  Then enter the below last digit; 

5)  Back to "standby" mode automatically after  step 4.
     You can hear beep sound which is a confirmation tone.

Service ready  
:5 1 1

last digit

"0"

default setting 

: normal

"1"

6dB up

CLEAR

35

Flash Memory is IC601.
BBIC is IC1.
(*1) For test point refer to Circuit Board (Base Unit_Main)
(P.95).

Check Power (P.31)
Charge Circuit (P.19)

Check VDD1(1.8V) :Test point (VDD1) (*1)

OK

Check Power Supply Circuit.

Check output of BBIC (Pin 41,43).

OK

Check BBIC and Flash Memory.

Check Speaker and its surroundings.

NO

NO

Is BBIC (IC1: 34) high at charge state?

Check Charge Circuit.

Check Power of Handset.

Is Check Power OK?

NO

NO

YES

Check Charge Circuit of Charger Unit.

Check Handset.

Plug in the AC Power source.
Charge Handset on Charger Unit.

Is the voltage of two charge contacts about
5.5 V or more?

OK

NO

Check Charge Contacts at Charger Unit
from mechanical point of view.

YES

36

Power Supply Circuit/Reset Circuit (P.13)
Check the RF part (P.38)

(*1) For Test Point refer to Circuit Board (Base
Unit_Main)(P.95)

*1 How to adjust +3.0V:
Execute the command "VDA"
Refer to Things to Do after Replacing IC or X'tal(P.66) for
Base Unit.
*2 How to adjust the frequency of X501:
Refer to Things to Do after Replacing IC or X'tal(P.66) for
Base Unit.

Check around Power Supply Circuit.

Does Base Unit connect to the properly working
Handset? 

Check around X501 and RF module and adjust
clock frequency.

NO

NO

NO

NO

YES

YES

Is the voltage of VDD3 about 3.0V? (*1)

Does the RF clock (CLK) oscillate at 10.368 MHz in
Base Unit Test Mode?

YES

Is the voltage of VDD1 about 1.8V?

YES

Base Unit is OK. Check Handset.

*1