Panasonic KX-TS620BX1 User manual

© Panasonic System Networks Co., Ltd. 2012
Unauthorized copying and distribution is a violation
of law.
ORDER NO. KM41204567CE
Telephone Equipment
KX-TS620BX1
Telephone Answering System
1: White Version
(for UAE and Saudi Arabia)
Caller ID Compatible

2
KX-TS620BX1
WARNING
This service information is designed for experienced repair technicians only and is not designed for use by the general
public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting
to service aproduct. Products powered by electricity should be serviced or repaired only by experienced professional
technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone
else could result in serious injury or death.
IMPORTANT SAFETY NOTICE
There are special componentsused in thisequipment which are important for safety. These partsare marked by
in the Schematic Diagrams, Circuit Board Diagrams, Exploded Viewsand Replacement PartsList. It isessential that
these cirtical partsshould be replaced with manufactuer'sspecified partsto prevent shock, fire or other hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT INFORMATION ABOUT LEAD FREE, (PbF), SOLDERING
If lead free solder wasused in the manufacture of thisproduct the printed circuit boardswill be marked PbF.
Standard leaded, (Pb), solder can be used asusual on boardswithout the PbF mark.
When thismark doesappear, please read and follow the special instructionsdescribed in thismanual on the
use of PbF and how it might be permissible to use Pb solder during service and repair work.
LWhen younote the serial number, write down all 11 digits. The serial number may be found on the bottom of the unit.
LThe illustrationsin thisService Manual may vary sllightly from the actual product.

3
KX-TS620BX1
TABLE OF CONTENTS
PAGE PAGE
1 Safety Precaution ------------------------------------------------ 4
1.1. For Service Technicians --------------------------------- 4
2 Warning -------------------------------------------------------------- 4
2.1. Battery Caution--------------------------------------------- 4
2.2. About Lead Free Solder (Pbf: Pb free)--------------- 4
2.3. Discarding of P. C. Board-------------------------------- 5
3 Specifications ----------------------------------------------------- 6
4 Technical Descriptions ----------------------------------------- 7
4.1. Block Diagram (Base Unit) ------------------------------ 7
4.2. Circuit Operation (Base Unit) --------------------------- 8
4.3. Ringer IC----------------------------------------------------10
4.4. Module Block Diagram ----------------------------------11
4.5. Signal Route -----------------------------------------------12
5 Location of Controls and Components ------------------13
6 Installation Instructions ---------------------------------------13
7 Operating Instructions-----------------------------------------13
7.1. For Service Hint-------------------------------------------13
8 Troubleshooting Guide ----------------------------------------14
8.1. Troubleshooting Guide ----------------------------------14
9 Disassembly and Assembly Instructions ---------------21
9.1. Disassembly Instructions -------------------------------21
10 Miscellaneous ----------------------------------------------------22
10.1. How to Replace the Flat Package IC ----------------22
10.2. How to Remove the IC ----------------------------------22
10.3. How to Install the IC -------------------------------------23
10.4. How to Remove a Solder Bridge ---------------------23
10.5. Terminal Guide of the Ics, Transistor and
Diodes -------------------------------------------------------24
11 Schematic Diagram ---------------------------------------------25
11.1. For Schematic Diagram---------------------------------25
11.2. Schematic Diagram (Main)-----------------------------26
11.3. Schematic Diagram (Operation) ----------------------28
12 Printed Circuit Board-------------------------------------------29
12.1. Circuit Board (Main)--------------------------------------29
12.2. Circuit Board (Operation) -------------------------------31
13 Exploded View and Replacement Parts List -----------33
13.1. Cabinet and Electric Parts -----------------------------33
13.2. Accessories and Packing Materials------------------34
13.3. Replacement Part List-----------------------------------35

4
KX-TS620BX1
1 Safety Precaution
1.1. For Service Technicians
ICs and LSIs are vulnerable to static electricity.
When repairing, the following precautions will help prevent recurring malfunctions.
1. Cover the plastic parts boxes with aluminum foil.
2. Ground the soldering irons.
3. Use a conductive mat on the worktable.
4. Do not touch IC or LSI pins with bare fingers.
2Warning
2.1. Battery Caution
1. Danger of explosion if battery is incorrectly replaced.
2. Replace only with the same or equivalent type recommended by the manufacturer.
3. Dispose of used batteries according to the manufacture’s Instructions.
2.2. About Lead Free Solder (Pbf: Pb free)
Note:
In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that con-
tains lead.
We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin (Sn),
Silver (Ag), and Copper (Cu).
This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair
work we suggest using the same type of solder.
Caution
• PbF solder has a melting point that is 50 °F ~ 70 °F (30 °C ~ 40 °C) higher than Pb solder. Please use a soldering iron with
temperature control and adjust it to 700 °F ± 20 °F (370 °C ± 10 °C).
• Exercise care while using higher temperature soldering irons.:
Do not heat the PCB for too long time in order to prevent solder splash or damage to the PCB.
• PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100 °F (600 °C).
• When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the
opposite side (See the figure below).
component
component
pin
solder
remove all of the
excess solder
slice view

5
KX-TS620BX1
2.2.1. Suggested PbF Solder
There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper
(Sn+Ag+Cu), you can also use Tin and Copper (Sn+Cu) or Tin, Zinc, and Bismuth (Sn+Zn+Bi). Please check the manufac
turer’s specific instructions for the melting points of their products and any precautions for using their product with other materi-
als. The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3 mm, 0.6 mm and 1.0 mm.
2.3. Discarding of P. C. Board
When discarding P. C. Board, delete all personal information such as telephone directory and caller list or scrap P. C. Board.
0.3 mm X 100 g 0.6 mm X 100 g 1.0 mm X 100 g

6
KX-TS620BX1
3 Specifications
Note:
• Design and specifications are subject to change without notice.
Power Supply: AC adaptor (AC 220 V — 240 V, 50/60 Hz)
PQLV219EW
Power Consumption: Standby: Approx. 2.4 W
Maximum: Approx. 3.0 W
Dimensions (H x W x D): Approx. 91 mm x 165 mm x 220 mm
Mass (Weight): Approx. 670 g
Dialing Mode: Tone (DTMF)/Pulse
Operating Environment: 5°C – 40°C
Ringer Equivalence No. (REN): 1.0 B

7
KX-TS620BX1
4 Technical Descriptions
4.1. Block Diagram (Base Unit)
T1 D3, D5 C1
PC1 R1
IC1 D4, D6
Speaker
Q103, Q104 D7, D9
T
R
Q401 D8, D10
MIC
D306
D304
IC304
Q701 Q702
6.5V DC Power
IC903
IC902
IC303, Q301
LCD
IC305
Handset / Headset
MIC
SP
IC904
Q402
Q108
Ringer indication LED
LED 804 (1AP - SUB)
IC901
DSP MICON
NS BBIC
JOHN SMITH 1234567890
Keyboard
Switch
RINGER
IC
BELL
Line
ON/OFF
Handset
Sending
Amp
Headset
Detection
FLASH
MEMORY
CIDIN+
CIDIN -
V
SP-Phone
Amp
MIC -
LSR +
HeadsetDET
MIC +
LSR -
LINE IN -
LINE OUT
Sidetone
Bridge
Reg.
1.8V
Reg.
3.2V
RSTn
VDD, AVD
VDDIO
VBAT2
Reset IC
Regulator
4.0V
Regulator
4.0V
ACFL
Power Down
Detection
KX-TS620 BLOCK DIAGRAM

8
KX-TS620BX1
4.2. Circuit Operation (Base Unit)
4.2.1. Outline
The unit consists of the following ICs as shown in the Block Diagram (Base Unit) (P.7).
•BBIC (Base Band IC): IC901
- Handling all the audio, signal and data processing needed
- ADPCM codec filter for speech encoding and speech decoding (DSP section)
- Echo-cancellation and Echo-suppression (DSP section)
- Any tones (tone, sidetone, ringing tone, etc.) generation (DSP section)
- DTMF receiver (DSP section)
- ADC, DAC, timer and power control circuitry
- All interfaces (eg: LCD, LED, Analog Front End, etc.)
•FLASH MEMORY: IC902
- Voice Prompt (TAM) Download Area
- Program D/L Area
•RINGER IC: IC1
- Bell signal generator (for bell detection purpose)
- Refer to Ringer IC (P.10)
•SP AMP: IC904
- Low voltage audio power amplifier
•Additionally,
- Power Supply Circuit (+4.0V, +4.0V, +3.2V, +1.8V output)
- Telephone Line Interface Circuit
- Bell Detection Circuit
- SP-Phone Circuit
- Handset Circuit
-TAMCircuit
4.2.2. Power Supply Circuit
The power is supplied to the BBIC, Flash ROM, SP AMP, Logic IC, LCD, LED from AC adaptor (6.5V) as below:
• BBIC (IC901): CN301 -> D304 -> IC304 -> Q702 -> IC901
• Flash Memory (IC902): CN301 -> D304 -> IC304 -> Q702 -> IC902
• Logic IC (IC905): CN301 -> D304 -> IC304 -> Q702 -> IC905
• SP AMP (IC904): CN301 -> IC305 -> IC904
• LCD (LCD): CN301 -> D304 -> IC304 -> Q702 -> L302 -> LCD
• LED (LED801, LED802): CN301 -> IC305 -> L301 -> CN403 -> CN801 -> LED
4.0V 1.8V
CN301
D304 D701
AC Adaptor
4.0V 3.2V IC902
IC905
IC904 LCD
LED
CN403
Main Operational
PCB PCB
IC901
BBIC
Flash Memory
Logic IC
DC
JACK
IC304
IC305
Q701
Q702
CN801
SP AMP
L301
L302

9
KX-TS620BX1
4.2.3. Telephone Line Interface
Function:
• Bell Signal Detection
• Caller ID Detection
• ON/OFF hook Circuit
• Audio Circuit
4.2.3.1. Bell Detection Circuit
When the bell signal is input from LINE to T/R (when the telephone rings), BBIC detects bell signal via following path:
T -> D3 -> IC1(1) -> IC1(8) -> C4 -> R6 -> PC1(1) -> PC1(4) -> IC901(63)
R -> R1 -> LED804 -> D4 -> IC1(1) -> IC1(8) -> C4 -> R6 -> PC1(1) -> PC1(4) -> IC901(63)
After bell signal detected at IC901(63), the bell ringing signal is output at the speaker via the following path:
4.2.3.2. Caller ID Detection Circuit
Normally, FSK caller ID data is followed after the 1st bell signal.
When the bell signal is detected by BBIC, Caller ID signal is sent through the circuit via
following path:
T -> C501 -> R503 -> R905 -> IC901(107)
R -> C502 -> R504 -> R908 -> IC901(112)
4.2.3.3. On/Off Hook Circuit
In standby mode, SW101 is open and Q104 is OFF. Consequently Q103 is open and cut the DC loop current and voice signal.
This is an on-hook condition.
When handset is picked up or SP-Phone key is pressed, Q104 turns on and then Q103 turns on, thus providing an off-hook
condition. A DC loop is made and current flows through the circuit via following path:
T -> D7 -> Q103 -> Q108 -> R124 -> D106 -> D10 -> R
Pulse signal is generated by repeated switches between high (3.2V) and low (0V) logic output from IC901(79), switching the line
loop on and off.
4.2.3.4. Handset Circuit
* Refer to Signal Route (P.12).
4.2.3.5. Speakerphone Circuit
* Refer to Signal Route (P.12).
IC901(110) -> C930 -> R925 -> IC904(4) IC904(8) -> C925 -> SP(+)
IC904(5) -> SP(-)

10
KX-TS620BX1
4.3. Ringer IC
Vcc 1
RSL2
LFI 3
LFO 4
OUT
8
HFI
7
HFO
6
GND
5
LOW FREQ
OSC
HIGH FREQ
OSC
POWER SUPPLY
WITH
HYSTERISIS
AMP
Pin descriptions
1
2
3
4
5
6
7
8
Vcc
RSL
LFI
LFO
GND
HFO
HFI
OUT
Pin No. Pin name
Power supply pin
RSL pin
Low-frequency time
constant connector pin
GND pin
High-frequency time
constant connector pin
Output pin
This is the power supply pin for the lC. It is connected to the ( ) pin of
the diode bridge.
This is used to change the operation initiation current when connected
to the GND pin.
This is connected to the time constant that determines the oscillation
frequency on the warble.
This pin has the lowest potential on the lC. It is connected to the ( )
pin of the diode bridge.
This is connected to the time constant that determines the oscillation
frequency on the tone side (the audible frequency side).
This is used to connect apiezoelectric buzzer, or to connect adynamic
speaker through atransformer.
Name Function

11
KX-TS620BX1
4.4. Module Block Diagram
4.4.1. LCD Module Block
4.4.2. Connector Pin Assignment
Pin no. Signal Function Enable
1 VDD +3V Power Supply —
2 VSS 0V Power Supply —
3 DB4 Data Bus Line H/L
4 DB5 Data Bus Line H/L
5 DB6 Data Bus Line H/L
6 DB7 Data Bus Line H/L
7 R/W Read / Write H/L
8 E Enable Signal H
9 D/C Data / Command Control H/L
10 CS Chip Signal L
11 RES Reset Signal Input L
(1) VDD LCD
SSD1801AV
CONTROLLER
SEG 80
COM 24 ICON
(2) VSS
(3..6)
DB4..DB7
(7) R/W
(8) E
(9) D/C
(10) CS
(11) RES

12
KX-TS620BX1
4.5. Signal Route
DTMF Tone IC901(100) - L312 - R936 - R937 - C951 - Q108 - Q103 D9 - T
( to Tel Line ) D10 - R
Handset TX
CN401(1) - L307 - CN402(4) - CN402(5) - C415 - R411 - R412 -
( to Tel Line ) C416 - Q401 - C417 - R952 - IC901(118) - IC901(100) - L312 -
R936 - R937 - C951 - Q108 - Q103 D9 - T
D10 - R
Handset RX T - D7
( from Tel Line ) R - D8 Q103 - C113 - R125 - C118 - L311 - R992 - IC901(102) -
IC901(111) - C423 - R422 - C428 - CN402(3) - CN402(2) - R430 -
L309 - CN401(3)
SP-Phone TX MIC - CN801(17) - CN403(17) - C908 - R904 - IC901(114) -
( to Tel Line ) IC901(100) - L312 - R936 - R937 - C951 - Q108 - Q103 D9 - T
D10 - R
SP-Phone RX T - D7
( from Tel Line ) R - D8 Q103 - C113 - R125 - C118 - L311 - R992 - IC901(102) -
IC901(110) - C930 - R925 - IC904(4) IC904(8) - C925 - SP(+)
IC904(5) - SP(-)
Headset TX
Headset MIC - CN402(5) - C415 - R411 - R412 - C416 - Q401 -
( to Tel Line ) C417 - R952 - IC901(118) - IC901(100) - L312 - R936 - R937 -
C951 - Q108 - Q103 D9 - T
D10 - R
Headset RX T - D7
( from Tel Line ) R - D8 Q103 - C113 - R125 - C118 - L311 - R992 - IC901(102) -
IC901(111) - C423 - R422 - C428 - CN402(3) - Headset
ICM Recording T - D7
( from Tel Line ) R - D8 Q103 - C113 - R125 - C118 - L311 - R992 - IC901(102)
OGM Recording MIC - CN801(17) - CN403(17) - C908 - R904 - IC901(114)
( from MIC )
ICM/OGM IC901(110) - C930 - R925 - IC904(4) IC904(8) - C925 - SP(+)
Playback IC904(5) - SP(-)
( to Speaker )
ICM/OGM IC901(100) - L312 - R936 - R937 - C951 - Q108 - Q103 D9 - T
Playback D10 - R
( to Tel Line )
SIGNAL ROUTE
IN SIGNAL ROUTE OUT

13
KX-TS620BX1
5 Location of Controls and Components
Refer to the Operating Instructions.
Note:
You can download and refer to the Operating Instructions (Instruction book) on TSN Server.
6 Installation Instructions
Refer to the Operating Instructions.
Note:
You can download and refer to the Operating Instructions (Instruction book) on TSN Server.
7 Operating Instructions
Refer to the Operating Instructions.
Note:
You can download and refer to the Operating Instructions (Instruction book) on TSN Server.
7.1. For Service Hint
(*1): If the current password is forgotten, enter “726276642” at the change password menu and you will be able to change the
password. After you enter a new password, you will be able to cancel the dial lock.

14
KX-TS620BX1
8 Troubleshooting Guide
8.1. Troubleshooting Guide
Cross Reference:
Check Power (P.15)
Check Bell Detection (P.15)
Check Playback (P.16)
Check Record OGM/IGM (P.16)
Check SP-phone Voice Transmission (P.17)
Check SP-phone Voice Reception (P.17)
Check Handset Voice Transmission (P.18)
Check Handset Voice Reception (P.18)
Check Pulse Dial (P.19)
Check DTMF Dial (P.19)
Check Caller ID Detection (P.20)
Flow Chart
No LCD display
Power ON Base Unit Check Power
OK No bell
Check Bell Detection
OK Not playback
Playback Greeting Check Playback
OK Not record
Record Message Check Record OGM/ICM
OK No voice
SP-Phone Voice Transmission Check SP-Phone Voice Transmission
OK No voice
SP-Phone Voice Reception Check SP-Phone Voice Reception
OK No voice
Handset Voice Transmission Check Handset Voice Transmission
OK No voice
Handset Voice Reception Check Handset Voice Reception
OK Not working
Pulse DialCheck Pulse Dial
OK
No signal
DTMF DialCheck DTMF Dial
OK CID not receive
CID Fucntion Check Caller ID Detection
Bell

15
KX-TS620BX1
8.1.1. Check Power
Cross Reference:
Power Supply Circuit (P.8)
Note:
BBIC is IC901.
(*1) Refer to “SPECIFICATIONS” on the cover page for part
number and supply voltage of AC adaptor.
8.1.2. Check Bell Detection
Note:
BBIC is IC901.
Is the AC adaptor inserted into AC outlet ? (*1)
Is the voltage of test point DC1 about 6.5V ? Check AC adaptor.
YES
YES
YES
YES
YES
YES
YES
YES
Is the voltage of test point TP303 about 4V ?
Is the voltage of test point TP304 about 4V ?
Is the voltage of test point (TP301) about 3.2V ?
Is the voltage of test point (TP302) about 1.8V ?
Is the voltage of BBIC(57) low ?
Is the voltage of test point (TP905) high ?
NO
Does BBIC(21) oscillate at 10.368MHz ?
Check IC303, R301, Q301, R307, C309.
Check IC903, C901, D901.
Check X900, C910, C911.
Check BBIC
NO
NO
NO
NO
NO
NO
NO
Check Power Supply Circuit.
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
( Input bell signal from LINE )
Is there bell signal at IC1 (8) ? Check around R1, C1, D1~D6, C2, IC1,
small PCB connection with LED804.
Is BBIC (63) become low when bell signal
comes in ? Check around C4, R6, PC1.
Is there bell ringing signal at test point
TP902?
Check BBIC.
Is IC904 (1) input voltage high ? Check IC905, BBIC.
Is there bell ringing signal at IC904 (5, 8) ? Check around R924, R925, C926~C930.
Check speaker and C925.

16
KX-TS620BX1
8.1.3. Check Playback
Cross Reference:
Power Supply Circuit (P.8)
Note:
BBIC is IC901.
Flash Memory is IC902.
8.1.4. Check Record OGM/IGM
Cross Reference:
Signal Route (P.12)
Bell Detection Circuit (P.9)
On/Off Hook Circuit (P.9)
Note:
BBIC is IC901.
Flash Memory is IC902
YES
YES
YES
YES
NO
NO
NO
NO
Is voltage at test point TP301 3.2V? Check Power Supply Circuit.
Is there output signal at test point TP902? Check BBIC, IC902.
Is IC904 (1) input voltage high ? Check IC905, BBIC.
Is there bell ringing signal at IC904 (5, 8)? Check around R924, R925, C926~C930.
Check speaker and C925.
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
Check MIC, flat cable connection, R932,
R934, C937.
Check OGM Record in Signal Route.
Check BBIC and IC902.
IncomingMessage (ICM) not recorded
Is the MESSAGE indicator (LED) on ?
( Input bell signal from LINE )
Is BBIC (63) become low when bell signal comes in?
Does the unit catch line after few ringings ?
Is there any signal at BBIC (102) when incoming
message is recorded ?
Check BBIC and IC902.
Press ANSWER ON button.
Is the MESSAGE LED on ?
Check LED802 at operation board.
Check Bell Detection Circuit.
Check On/Off Hook Circuit
Check ICM recording in Signal Route.
GreetingMessage (OGM) not recorded
Is there any signal at BBIC (114), when MIC input
signal ?

17
KX-TS620BX1
8.1.5. Check SP-phone Voice Transmission
Cross Reference:
Signal Route (P.12)
On/Off Hook Circuit (P.9)
Note:
BBIC is IC901.
8.1.6. Check SP-phone Voice Reception
Cross Reference:
On/Off Hook Circuit (P.9)
Signal Route (P.12)
Note:
BBIC is IC901.
Check MIC, flat cable connection, R932,
R934, C937.
Check OGM Record in Signal Route.
Check BBIC.
Check SP-phone TX in Signal Route.
Check On/Off Hook Circuit.
Input signal 1.0kHz/-50dBm to the microphone of
BASE UNIT and SP-PHONE on.
Is there signal at BBIC (114)?
Is there output signal at BBIC (100)?
Is there output signal at base of Q108?
Is there output signal at T/R?
Check Tel Cord.
YES
YES
YES
YES
NO
NO
NO
NO
Check On/Off Hook Circuit.
Input signal 1.0kHz/-30dBm to Tel Line and
SP-PHONE on.
Does the unit catch line ?
Check SP-phone RX in Signal Route.
Check BBIC.
Check IC905, BBIC.
Check around R924, R925, C926~C930.
Is there input signal at BBIC (102) ?
Is there output signal at test point TP902 ?
Is IC904 (1) input voltage high ?
Is there bell ringing signal at IC904 (5, 8) ?
Check speaker and C925.
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO

18
KX-TS620BX1
8.1.7. Check Handset Voice Transmission
Cross Reference:
Signal Route (P.12)
On/Off Hook Circuit (P.9)
Note:
BBIC is IC901.
8.1.8. Check Handset Voice Reception
Cross Reference:
On/Off Hook Circuit (P.9)
Signal Route (P.12)
Note:
BBIC is IC901.
Input signal 1.0kHz/-40dBm to the microphone of
HANDSET and off-hook.
Is there signal at BBIC (118)?
Is there output signal at BBIC (100)?
Is there output signal at base of Q108?
Is there output signal at T/R?
Check Tel Cord.
Check Handset TX in Signal Route.
Check BBIC.
Check Handset TX in Signal Route.
Check On/Off Hook Circuit.
YES
YES
YES
YES
NO
NO
NO
NO
Input signal 1.0kHz/-20dBm to Tel Line and off-
hook.
Does the unit catch line ?
Is there input signal at BBIC (102) ?
Is there output signal at test point TP904 ?
Is there output signal to CN401 (SP+) ?
Check Handset
YES
YES
YES
YES
NO
NO
NO
NO
Check On/Off Hook Circuit.
Check Handset RX in Signal Route.
Check BBIC.
Check Handset RX in Signal Route.

19
KX-TS620BX1
8.1.9. Check Pulse Dial
Note:
BBIC is IC901.
8.1.10. Check DTMF Dial
Cross Reference:
Signal Route (P.12)
YES
YES
YES
NO
NO
NO
( Set dial mode to PULSE mode, dial anumber )
Is there pulse monitor sound ?
Is there pulse signal (3.2V~0) at base of Q109 ?
Is there pulse signal (0.6V~0) at base of Q104 ?
Check Q104, Q103, R108, R113.
Check R910, C905 and C428.
Check BBIC and L316.
Check Q109.
( Set dial mode to TONE mode, dial anumber )
Check DTMF tone output to LINE in Signal Route.

20
KX-TS620BX1
8.1.11. Check Caller ID Detection
Cross Reference:
Bell Detection Circuit (P.9)
Caller ID Detection Circuit (P.9)
YES
YES
YES
YES
NO
NO
NO
NO
Check Bell Detection Circuit.
Caller ID datais not sent from Telephone
Exchanger. Contact the telephone
company to subscribe Caller ID features.
Check around R501, R503, C501, C503,
R905
Check around R502, R504, C502, C504,
R908
Datain
1200Hz or 1300Hz = Data"1" 2100Hz or 2200Hz =Data"0"
A
( Input Caller ID sigal )
Did bell ring ?
( Message indicator blinks )
Was Caller ID signal sent between 1st bell
and 2nd bell at T/R ?
Is there CID signal at BBIC(107) ?
Is there CID signal at BBIC(112) ?
Check R989, R909, C906, C907 and BBIC.
A