DOWNLOAD Panasonic KX-FC268RU-T Service Manual ↓ Size: 10.86 MB | Pages: 127 in PDF or view online for FREE

49

KX-FC268RU-T

Handset consists of the following ICs as shown in Block Diagram (P.48).

• DECT BBIC (Base Band IC): IC1

- All data signals (forming/analyzing ACK or CMD signal)
- All interfaces (ex: Key, Detector Circuit, Charge, DC/DC Converter, EEPROM, LCD, RF Power Amp.)
- PLL Oscillator
- Detector
- Compress/Expander
- Reception

• RF Power Amp: IC801

- Amplifier for transmission

• EEPROM: IC3

- Temporary operating parameters (for RF, etc.)

When power on the Handset, the voltage is as follows;
BATTERY(2.2 V ~ 2.6 V: BATT+) 

→ F1 → Q2 (1.8 V), IC1-43pin (2.5V)

The Reset signal generates IC1 (61 pin) and 1.8 V.

When charging the cordless handset on the Base Unit, the charge current is as follows;
DC+(6.5 V) 

→ D1 → R56 → R55 → D22 → CHARGE+(Base) → CHARGE+(Handset) → Q4 → D7→ F1 → BATTERY+...

Battery... 
BATTERY- 

→ R45 → GND → CHARGE-(Handset)→ CHARGE-(Base) → GND → DC-(GND)

In this way, the BBIC on cordless handset detects the fact that the battery is charged.
The charge current is controlled by switching Q9 of cordless handset.

"Battery Low" and "Power Down" are detected by BBIC which check the voltage from battery.
The detected voltage is as follows;

• Battery Low

Battery voltage: V(Batt)   2.25V ± 50mV

The BBIC detects this level and "

" starts flashing.

• Power Down

Battery voltage: V(Batt)   2.0V ± 50mV
The BBIC detects this level and power down.

The hands-free loudspeaker at SP+ and SP- is used to generate the ring alarm.

50

KX-FC268RU-T

51

KX-FC268RU-T

• The built-in microphone.

• To record a greeting message.

• To check a greeting message.

• To record a memo message.

• To erase messages.

• To turn the auto answer setting ON/OFF.

• To play messages.

• To redial the last number dialled. If the line is busy when you

make a phone call using the {DIGITAL SP-PHONE} button,
or when you send a fax, the unit will automatically redial the
number 2 or more times.

• To insert a pause during dialing.

• To access special telephone services or for transferring

extension calls.

• The recall/flash time can be changed (feature #72). 

(Refer to Program Mode Table (P.102).)

• To use Caller identification features.

• To stop an operation or programming session.
• To erase a character/number.

• To make/answer intercom calls.
• To page or locate a cordless handset.

• To print lists and reports for reference purposes.

• To start or exit programming.

• To search for a stored item.
• To select features or feature settings during programming.
• To adjust the volume.
• To open a phonebook.

• To store a setting during programming.

• To change from pulse to tone temporarily during dialling 

when your line has rotary pulse service.

• To mute your voice during a conversation. Press again to 

resume the conversation.

• For speakerphone operation.

• To send or receive a fax.

• To copy a document.

• To select the features or operations displayed directly above

each key.

• To make/answer calls.

• For speakerphone operation.

(4) {*}(Tone) 

• To change from pulse to tone temporarily during dialling

when your line has rotary pulse service.

• To turn power ON/OFF.
• To hang up.
• To stop an operation or programming.

• To adjust the receiver or speaker volume (up or down) while

talking.

• To scroll through (up or down) various lists or items.
• To move the cursor (left or right) to edit number or name.

(6) {R/E}(Recall)

• To access special telephone services or for transferring

extension calls.

• The recall/flash time can be changed (feature #72).
• To set the alarm feature.

52

KX-FC268RU-T

Refer to Translation Lists (P.12) for display.

The space required to install the unit is shown below.
The dimensions given are necessary for the unit to operate effi-
ciently. (When the recording paper is not inserted to the unit.)

• Avoid excessive heat or humidity.
• Use the unit within the following ranges of temperature and 

humidity.

• Ambient temperature: 5

°C to 35°C

• Relative humidity: 20% to 80% (without condensation)
• Avoid direct sunlight.
• Do not install near devices which contain magnets or gener-

ate magnetic fields.

• Do not subject the unit to strong physical shock or vibration.
• Keep the unit clean. Dust accumulation can prevent the unit 

from functioning properly.

• To protect the unit from damage, hold both sides when you 

move it.