DOWNLOAD Panasonic KX-TGK310RUB / KX-TGK320RUB / KX-TGKA31RUB Service Manual ↓ Size: 7.69 MB | Pages: 94 in PDF or view online for FREE

33

Power Supply Circuit/Reset Circuit (P.11)
Check the RF part (P.34)

(*1) Refer to Handset (Main) (P.81).
(*2) Refer to Check Point (Handset) (H) (P.43).

Check around Power Supply Circuit/Reset Circuit .

Check BBIC (IC1)

Does Handset make link with Base Unit?
(Correct working unit)

Check around X1 and adjust clock frequency. 

(*2)

 

NO

NO

NO

NO

Is the voltage of "1.8V" about 1.8 V? 

(*1)

YES

YES

YES

YES

Is the voltage of CP3V about 3.0 V? 

(*1)

Does the RF clock (CKM) oscillate: 10.368 MHz
in Handset Test Mode?

Handset is OK. Check Base Unit.

YES

OK

Check the RF part.

 

NO

NO

Adjust 1.8V voltage to 1.8 V.

Is the voltage of CP4V about 4.0V? 

(*1)

 

(When LED is ON)

34

1. Re-register the checked handset to the checked base unit, and Regular HS to Regular BU.

(*1) HS: Handset
(*2) BU: Base Unit

1. Prepare Regular HS(*1) and Regular BU(*2).
2. a. Re-register regular HS (Normal mode) to base unit (to be checked).
        If this operation fails in some ways, the base unit is defective.
    b. Re-register handset (to be checked) to regular BU (Normal mode). 
        If this operation fails in some ways, the handset is defective.

Base unit is defective

Handset is defective

START

Registration of 

Regular HS to

base unit

Registration of 

handset to

Regular BU

(other checkings)

Registration of handset to base unit 

(checked ones)

Registration of Regular HS to Regular BU

Yes

No

No

Yes

35

Each item (1 ~ 6) of RF Check Flowchart corresponds to Check Table for RF part (P.36).
Please refer to the each item.

(*1) Refer to Check Link (P.32).

Start

Link

confirmation

Normal

1

Control

signal

confirmation

X'tal

Frequency

confirmation

TX confirmation

RX confirmation

 Range

confirmation

Normal

TEST RANGE Check.

Check BBIC interface parts.
(RF Block <->BBIC on BU/HS P.C.B)

Adjust X'tal Frequency. (*1)

Check  TX Block.

Check  RX Block.

GOOD

6

2

3

4

5

OK

OK

OK

OK

NG

NG

NG

NG

NG

NG

OK

OK

36

(*1) Adjustment Standard (Base Unit) (P.52)
(*2) Adjustment Standard (Handset) (P.55)

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

HS, BU Mode: [Adjustment]

Check X

'

tal Frequency.

(13.824000 MHz ±100 Hz)

Check X

'

tal Frequency.

(10.368000 MHz ±100 Hz)

3

TX confirmation

Regular HS (BU) Mode:
[Test RX Mode]

BU (HS) Mode:
[Test TX_Burst Mode]

1. Place Regular HS 15 cm away from a 

checked BU.

2. Confirm "TXDATA" waveform of BU (*1) 

and “RXDATA“  waveform of Regular HS by 
Digital Oscilloscope. 

1. Place Regular BU 15 cm away from a 

checked HS.

2. Confirm "TXDATA" waveform of HS (*2) 

and "RXDATA" waveform of Regular BU by 
Digital Oscilloscope. 

4

RX confirmation

Regular HS (BU) Mode:
[Test TX_Burst Mode] 

BU (HS) Mode:
[Test RX Mode]

1. Place Regular HS 15 cm away from a 

checked BU.

2. Confirm "RXDATA" waveform of BU (*1) 

and “TXDATA“  waveform of Regular HS by 
Digital Oscilloscope. 

1. Place Regular BU 15 cm away from a 

checked HS.

2. Confirm "RXDATA" waveform of HS (*2) 

and "TXDATA" waveform of Regular BU by 
Digital Oscilloscope. 

5

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.