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Model
KX-TG1611CAH KX-TG1611CAR KX-TG1611CAW KX-TG1612CA3 KX-TG1612CAH KX-TGA161RUH KX-TGA161RUR KX-TGA161RUW
Pages
64
Size
2.11 MB
Type
PDF
Document
Service Manual
Brand
Device
Telephone / DIGITAL CORDLESS PHONE
File
kx-tg1611cah-kx-tg1611car-kx-tg1611caw-kx-tg1612ca.pdf
Date

Panasonic KX-TG1611CAH / KX-TG1611CAR / KX-TG1611CAW / KX-TG1612CA3 / KX-TG1612CAH / KX-TGA161RUH / KX-TGA161RUR / KX-TGA161RUW Service Manual ▷ View online

10
KX-TG1611CA/KX-TG1612CA/KX-TGA161RU
4.3.
Block Diagram (Handset)
E a r p i e s e 
( S p e a k e r ) 
A n a l o g 
F r o n t 
E n d 
D S P 
R F 
C P U 
X T A L 
2 0 . 7 3 6 M H z 
X101
E E P R O M 
( I C 1 0 2 ) 
B A T T E R Y 
C O S I C 
C h a r g e + 
C h a r g e - 
R e g u l a t o r 
3 . 3 V 
5
4
45
44
35
36
C h a r g e 
c i r c u i t 
S C L K 
D A T A 
48
47
M I C 
K E Y P A D 
O N  S W I T C H 
R I N G E R 
3 . 3 V 
37
R102
C H A R G E 
C H A R G E 
L C D 
3 . 3 V 
V D D B A T 
V D D D C D C 
Q 1 0 3
38
1
2 . 4 V 
2 . 4 V 
Q101/102
2 . 4 V 
SDRV
M A D 4 P 
32
IC103
IC101
KX-TGA161 BLOCK DIAGRAM (HANDSET)
BZ2
R102
Q105
53
54
Q104
11
KX-TG1611CA/KX-TG1612CA/KX-TGA161RU
4.4.
Circuit Operation (Handset)
4.4.1.
Outline
Handset consists of the following ICs as shown in Block Diagram (Handset) (P.10).
• DECT BBIC (Base Band IC): IC103
- All data signals (forming/analyzing ACK or CMD signal)
- All interfaces (ex: Key, Detector Circuit, Charge, DC/DC Converter, EEPROM, LCD)
- PLL Oscillator
- Detector
- Compress/Expander
- Amplifier for transmission and reception
• EEPROM: IC102
- Temporary operating parameters
4.4.2.
Power Supply Circuit/Reset Circuit
Circuit Operation:
When power on the Handset, the voltage is as follows;
The Reset signal generates R121, C186 and  2.6V.
4.4.3.
Charge Circuit
Circuit Operation:
When charging the handset on the Base Unit, the charge current is as follows;
DC+ 
→ F1 → R39 → CHARGE+ (Base) → CHARGE+ (Handset) → Q101 → L104 → BATTERY+... Battery... 
BATTERY- 
→ R102 → GND → CHARGE- (Handset)→ CHARGE- (Base) → GND → DC- (GND)
In this way, the BBIC on Handset detects the fact that the battery is charged.
The charge current is controlled by switching Q101 of Handset.
Refer to Fig.101 in Power Supply Circuit (P.8).
4.4.4.
Battery Low/Power Down Detector
Circuit Operation:
“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) < 2.20V
The BBIC detects this level and “
” is displayed on LCD and “battery alarm” starts ringing.
• Power Down
Battery voltage: V (Batt) < 2.05V
The BBIC detects this level and power down.
4.5.
Circuit Operation (Charger Unit)
4.5.1.
 Power Supply Circuit
The power supply is as shown.
B A T T E R Y   ( 2 . 2   V      2 . 6 V )           D 1 0 7          IC103 - V D D B A T           I C 1 0 3 - S D R V           R 1 0 7  
L 1 0 3          I C 1 0 1          3 . 3 V 
~
R1
5.5 V DC
TP1
TP2
J1
AC Adaptor
F1
AC
12
KX-TG1611CA/KX-TG1612CA/KX-TGA161RU
4.6.
Signal Route
(BASE UNIT)
IC3 - H01P, H01N - R2 - C5 - Q1 - Q3 - D2       A
SIGNAL ROUTE
ROUTE
IN
OUT
SIGNAL
DTMF TONE
TEL OUT 
(to Tel Line)
CDL TX
(to Tel Line)
CDL RX
(from Tel Line)
(BASE UNIT)
from HANDSET        ANT1 - C41          D6 - D801 - C820 - IC3 - RXI, RXIX - IC3 - H01P, H01N -  
B
 ANT2 -  C39
R2 - C5 - Q1 - Q3 - D2         A
B
B
(BASE UNIT)
A        D2 - Q3 - R12 - C15 - R14 - IC3 - LINEA - IC3 - POS, POX - C826 - D801 - D6
Caller ID 
(from Tel Line)
(BASE UNIT)
A - C26 - R33 - R50 - R200 - IC3 - LINEN
B - C27 - R34 - R51 - R201 - IC3 - LINEP
              C39     -      ANT1 to HANDSET
C41      -     ANT2 to HANDSET
IC103 - H01N - SPEAKER (-)
(HANDSET)
from BASE UNIT - ANTENNA - C149 - D803 - C820 - IC3 - RXI, RXIX       IC103 - H01P -  SPEAKER (+)
(HANDSET)
MIC        C105 - IC103 - MICP                      ANT to BASE UNIT
R105 - C106 -  IC103  - MICN
DTMF TONE
TEL IN 
(from Tel Line)
B
(BASE UNIT)
A        D2 - Q3 - R12 - C15
13
KX-TG1611CA/KX-TG1612CA/KX-TGA161RU
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
Items
Contents
Battery
You could use other rechargeable batteries sold in a market, but the unit is not guaranteed to work 
properly.
The battery strength may not be indicated correctly if the battery is disconnected and connected again,
even after it is fully charged. In that case, by recharging the battery as mentioned in the Operating
Instructions, you will get a correct indication of the battery strength.
PIN Code
Base unit PIN
1
{j/OK}
2
{ }: “Setup” i{j/OK}
3
{ }: “Change PIN”i{j/OK}
4
Old PIN 
i Input Current PIN
5
New PIN 
i Input New PIN
6
Re-enter PIN 
i Input New PIN
8
{ic}
7
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