BBK BKT-58T RU Technical Document

Telephone Equipment
MODEL: BKT-58P/T RU
Basic Phone
MAINFEATURES
1. Ringer Volume Switch 2. Tone/Pulse Switch
3. PAUSE Button 4. FLASH Button
5. Notepaper Case 6. IN USE Indicator
7. RING Indicator
Service Manual

Main Features--------------------------------------------------------------------------------------------------------------------------------1
Installation-------------------------------------------------------------------------------------------------------------------------------------1
Setting the Tone/Pulse Switch -----------------------------------------------------------------------------------------------------------2
Setting the Ringer LO-HI Switch---------------------------------------------------------------------------------------------------------2
Answering a Call-----------------------------------------------------------------------------------------------------------------------------2
Making a Call---------------------------------------------------------------------------------------------------------------------------------2
Redial Button ---------------------------------------------------------------------------------------------------------------------------------2
P*T Button -----------------------------------------------------------------------------------------------------------------------------------3
PAUSE Button--------------------------------------------------------------------------------------------------------------------------------3
FLASH Button--------------------------------------------------------------------------------------------------------------------------------3
Notepaper Case -----------------------------------------------------------------------------------------------------------------------------3
Location of Controls-------------------------------------------------------------------------------------------------------------------------4
Block Diagram--------------------------------------------------------------------------------------------------------------------------------5
Explosion Diagram--------------------------------------------------------------------------------------------------------------------------6
IC Data-----------------------------------------------------------------------------------------------------------------------------------------7-10
Elements Diagram---------------------------------------------------------------------------------------------------------------------------11
PCB Diagram---------------------------------------------------------------------------------------------------------------------------------12
Replacement Parts List --------------------------------------------------------------------------------------------------------------------13-14
Troubleshooting------------------------------------------------------------------------------------------------------------------------------15
Contents

1
MAINFEATURES
1. Ringer Volume Switch
2. Tone/Pulse Switch
3. PAUSE Button
4. FLASH Button
5. Notepaper Case
6. IN USE Indicator
7. RING Indicator
INSTALLATION
1. Connect one end of coiled cord to the jack of handset and other to the jack of base set.
2.Plug one end of the straight cord to the base unit and other end to the line jack unit/terminal.

2
SETTINGTHETONE/PULSESWITCH
1. If your home is equipped with a Touch-Tone dialing system, set the Tone/Pulse Switch to the Tone position.
2. If you have a rotary dialing system set the Tone/Pulse Switch to the Pulse position.
3. If you are unsure which system you have, set the Tone/Pulse Switch to the Tone position. Lift the Handset and
dial a telephone number when you get a dial tone. If the dial tone continues, move the Tone/Pulse Switch to the
Pulse position and dial a number again.
SETTINGTHERINGERLO-HISWITCH
The Ringer Hi/Lo Switch can be used to set the sound level of the unit ringer. Set the Ringer Hi/Lo Switch to the Hi
position for normal operation. Set the Ringer Hi/Lo Switch to the Lo position for lower sound.
ANSWERINGACALL
On hearing the ring tone, lift the HANDSET and preceed with conversation. At the end of conversation replace the
handset.
MAKEINGACALL
1. Lift the HANDSET and wait a dial tone. The In Use Indicator will light up
2. Dial the telephone number you wish to call.
3. Replace the HANDSET as soon as you finish you conversation.
REDIALBUTTON
1. If the number you dialed is busy or you want the last number to be dialed again, press the Hook Switch and
release for a new dial tone.
2. Press the REDIAL button and release.
3. The last called number will automatically be redialed.

3
PAUSEBUTTON
The PAUSE button allows you to insert a pause in the automatic dialing sequence. This is particularly useful if you
are using the unit as part of a PABX system, where you must dial an access code (usually numberì0î) to obtain an
outside line.
FLASHBUTTON
FLASH button allows the user to take advantage of special calling services offered by the PABX telephone exchange.
Press FLASH button to switch from current call to incoming call. Press FLASH button once again to return to the
original call.
NOTEPAPERCASE
On the unit, there is a notepaper case with notepaper in it. It is convenient for user write down something or phone
number.

4
LocationofControls
PAUSE Button
REDIAL Button
FLASH Button
PAUSE Button
TelephoneNumber
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1
2
3
4
5
6
7
8
9
Directory
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BKT 58P/T RU
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PAUSE
FLASH
REDIAL
FLASH Button
Dial Buttons
REDIAL Button
Hook Switch
Built-in Speaker
Handset
Coiled Line
Built-in Speaker
Hook Switch
Dial Buttons

5
BlockDiagram

6
ExplosionDiagram

7
ICData-Ringer

8
ICData-Ringer
Vcc
Tr
Csf
Rsf

9
ICData

10
ICData-PinDescription

ElementsDiagram
11

PCBDiagram
12

13
ReplacementPartsList

14
ReplacementPartsList

15
Troubleshooting
The telephone does not ring when you receive a call
1. Make sure the telephone cord is connected firmly to the base unit and the telephone jack.
2. Make sure the handset is placed correctly.
There is no dial tone
1. Check whether the telephone line is disconnected
2. Check whether the telephone line has signal.
The number canít be dialed out
Check to see if the Pulse/Tone Switch is in the correct position.
Redial button does not work
The phone may have been momentarily disconnected from the phone jack.

Telephone Equipment
MODEL: BKT-58P/T RU
Basic Phone