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(*1) Refer to Adjustment Standard (Base Unit) (P.50)
(*2) Refer to Adjustment Standard (Handset) (P.54)

No.

Item

BU (Base Unit) Check

HS (Handset) Check

1

Link Confirmation Normal

HS, BU Mode: [Normal mode]

1. Register Regular HS to BU (to be 

checked).

2. Press [Talk] key of the Regular HS to 

establish link.

1. Register HS (to be checked) to Regular 

BU.

2. Press [Talk] key of the HS to establish link.

2

X’tal Frequency confirmation

1. Check X’tal Frequency. (*1)

(10.368 MHz ± 100 Hz)

1. Check X’tal Frequency. (*2)

(10.368 MHz ±100Hz)

3

Range Confirmation Normal

HS, BU Mode: [Normal mode]

1. Register Regular HS to BU (to be 

checked).

2. Press [Talk] key of the Regular HS to 

establish link.

3. Compare the range of the BU (being 

checked) with that of the Regular BU.

1. Register HS (to be checked) to Regular 

BU.

2. Press [Talk] key of the HS to establish link.
3. Compare the range of the HS (being 

checked) with that of the Regular HS.

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Signal Route (P.15)

How to Check the Handset Speaker or Receiver (P.58).
Signal Route (P.15)

Signal Route (P.15)

OK

Check MIC of Handset.

Check CDL TX (HANDSET) in Signal Route.

Check Handset Speaker in How to check the Handset 
Speaker or Receiver.

OK

Check CDL RX (HANDSET) in Signal Route.

Check Caller ID in Signal Route.

35

Telephone Line Interface (P.11)
Check Link (P.27)
How to Check the Handset Speaker or Receiver (P.58)

Check around C54, C55, R36, R37.

When bell signal is coming, is there bell sound  
signal at BBIC (IC7: 20, 21)?

NO

YES

When bell signal is coming, is there bell sound
signal at BBIC (IC7: 24)?

Check around C3, C4, C5, C6, R3, R4, R5, R6,
C136, C137, R32, R33, R34, R35, C52, C53, 
L1, L2, C168, C42, C43,R42,R43 

NO

Does the bell sound from SPEAKER?

Check around SP+, SP- .

When bell signal coming, is there bell sound signal 
at BBIC (IC1: 33, 35)?

NO

NO

YES

When bell signal coming, is there bell sound signal
at SP+, SP- ?

YES

Check BBIC (IC1), C78, C79, C73, C72, D13, 
D14, R208, R209

NO

Check cable of SPEAKER and resistance value
of SPEAKER.

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If your unit has below symptoms, follow the instructions in remedy column. Remedies depend on whether you have DECT tester
(*1) or not. 

(*1) A general repair is possible even if you don’t have the DECT tester because it is for confirming the levels, such as Acoustic
level in detail.
(*2) Refer to Check Point (Base Unit) (P.36)

Please follow the items below when BBIC or EEPROM or FLASH is replaced.

After the measuring, suck up the solder of TP.
*: The Setting Method of JIG (Base Unit) (P.48) is required beforehand.
The connections of simulator equipment are as shown in Adjustment Standard (Base Unit) (P.50).

You have DECT Tester. 

(Model Number : CMD60)

Check item (A)-(I),(T).

Check item (A)-(I), (J)-(P),(T).

Check item (A)-(G),(Q),(T).

Check item (A)-(G), (J)-(P), (Q),(T).

-

Check item (J)-(P).

Check item (Q).

Check item (Q).

Check item (Q).

Check item (Q).

Check item (A)-(I).

Check item (A)-(P).

Check item (R).

Check item (R).

Remedy (*2)

Symptom

You don't have DECT Tester.

Items

Check 

Point

Procedure

Check or 

Replace Parts

(A)

3.0 V Supply 
Confirmation

VDD3

1. Confirm that the voltage between test point VDD3 and GND is 3.0 V ± 0.2 V.

IC2, IC3, C32, 

C36, C86, C87, 
C88, R91, R92, 
R93, R95, D10, 

Q10, L3

(B)

1.8 V Supply 
Confirmation

VDD1

1. Confirm that the voltage between test point VDD1 and GND is 1.8 V ± 0.02 V.
2. Execute the command “VDD”, then check the current value.
3. Adjust the 1.8V voltage of VDD1 executing command “VDD XX“(XX is the

value).

Q8, C75, C614, 

C61, IC7

(C) Charge Pump 2.5V

Supply Confirmation

VDD5

1. Confirm that the voltage between test point VDD5 and GND is 2.5 V ± 0.3 V.  IC7,C625,C631

(D) Charge Pump 3.0V

Supply Confirmation

VDD4

1. Confirm that the voltage between test point VDD4 and GND is 3.0 V ± 0.2 V.  IC7,C616,C630

(E)*

BBIC Confirmation

-

1. BBIC Confirmation (Execute the command “getchk”).
2. Confirm the returned checksum value.

Connection of checksum value and program number is shown below.

IC7, X1, R77, 

RA80

(F)* EEPROM Confirmation

-

1. EEP-ROM Confirmation (Execute the command "sendchar EPV").
2. Confirm the returned Value(Value for reference is written at “EEPROM C/

SUM” in Software_Version_Table.xls).

IC7, RA402, 

C51, R657, 

IC401

(G)* BBIC Clock Adjustment

CLK

1. Input Command “ sendchar WWD ff 48 IC 8006”
2. Confirm that the voltage between testpoint VDD4 and GND is less than 1.0 V.
3. Input Command “ sendchar sfr”, then you can confirm the current value.
4. Check X’tal Frequency. (10.368 MHz ± 100 Hz).
5. If the frequency is not 10.368MHz ± 100Hz, adjust the frequency of CLK

executing the command “sendchar sfr xx xx (where xx is the value)” so that
the reading of the frequency counter is 10.368000 MHz ± 5 Hz.

X1, IC7, R430, 

C305

checksum value

357D

program number

DBQ1EN

ex.)