Panasonic KX-FM131CE Simplified Service Manual ▷ View online
4 CIRCUIT OPERATIONS
4.1. CONNECTION DIAGRAM
Change from original page 139 (6.1. CONNECTION DIAGRAM)
LCD
(COB)
CN103
TO TEL LINE
DIGITAL
BOARD
BOARD
CN104
TO EXT. TEL
CIS
POWER
SUPPLY
BOARD
SUPPLY
BOARD
CN504
3
4
4
1
2
2
5
6
7
8
9
6
7
8
9
10
CN506
1
2
3
4
5
2
3
4
5
CN508
+24V
+24V
PG
+24V
PG
1
2
3
4
5
6
7
8
2
3
4
5
6
7
8
PG
+5V
TM
STB1
STB2
+5V
TM
STB1
STB2
9
STB3
10
THCLK
11
THLAT
12
THDAT
CN505
CN301
CN304
FG
1
JOG2
2
JOG1
3
GND
4
+5V
5
KSTART
6
KLATCH
7
KSCLK
8
KTXD
9
+24V
+24V
+24V
PG
PG
DG
+5V
KRXD
10
1
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
9
CN509
+24V
+24V
+24V
PG
PG
DG
+5V
1
2
3
4
5
6
7
8
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
2
3
4
5
6
7
8
10
11
11
OPERATION
BOARD
BOARD
1
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
9
RESET
11
CN102
CN502
DG
1
AG
2
+5VA
3
+5VD
4
+24V
5
HSRX
6
TONE1
7
HSTX
8
NC
9
1
2
3
4
5
6
7
8
2
3
4
5
6
7
8
1
+24V
2
+24V
3
GND
4
GND
5
+5V
6
THER
7
STB1
8
STB2
9
STB3
10
THCLK
11
THLAT
12
THDAT
9
CN101
CN501
BELL
1
T/P
2
DCN
3
CPC
4
MDL SEL
5
LINE RLY
6
BREAK
7
LINE RX
8
ANALOG BOARD
HAND
SET
SET
CN105
HSMIC+
HSSP-
HSSP-
4
3
3
HSSP+
HSMIC-
HSMIC-
2
1
1
THERMAL
HEAD
HEAD
MON RX
9
LINE TX
10
1
2
3
4
5
6
7
8
9
2
3
4
5
6
7
8
9
10
HOOK
SW
GND
+5V
VO
RS
R/W
E
+5V
VO
RS
R/W
E
D4
D0
D1
D2
D3
D1
D2
D3
D5
D6
D7
D6
D7
10
11
12
13
14
11
12
13
14
X501
32.768kHz
X502
24MHz
X503
32.256MHz
A
B
NA
B
NA
MOTOR
NB
COM
COM
CLK
SIG
GND
+5V
GND
+5V
GND
SI
GND
SI
GND
G. LED
V. LED
V. LED
CN512
MIC
MIC+
MIC-
MIC-
1
2
2
POSITION SW
MPOS
GND
GND
CN503
CN507
SPEAKER
SP+
SP-
SP-
1
2
2
2 1
CN303
HOOK
GND
GND
1
2
2
CN401
1
2
2
17
KX-FM131CE
4.2. General Block Diagram
Change from original page 141 (6.2.1. General Block Diagram)
OPERATION PANEL
LED
JOG
DOC
SENSOR
LCD PANEL
CN304
KEY MATRIX
READ
POSITION
G/A
IC301
+
-
+
-
OP-PANE
I/F
256 kbit
ROM
RESET
DRAM
I/F
DATYA
CLK
LAT
MOTOR I/F
IMAGE
PROCESSING
A/D
CIS
LED
ARRAY
64kbit
SRAM
PRINTER CONTROL
DEDUCTION CIRCUIT
CODEC
+5V
+5V/BATT
Q513
CN101
CN102
CN201
CN105
HS MIC-
HS SP+
HS SP-
HS MIC+
+3.3V
+5V
+24V
+3V
/BATT
TXM
CN506
CN512
MIC
CN510
KX-FM131
ONLY
MOTOR
SPEAKER
CPU
RTC
OSC
IC503
IC501
IC505
IC502
IC504
IC551
ANALOG P.C.B
CN508
CN504
CN503
FILM END
THERMAL
HEAD
DRAM
ROM
X'POINT
SRAM
+5V/BATT
RECTIFIER
DC/DC
CONVERTER
SWITCHING POWER SUPPLY
AC
NOISE
FILTER
CN505
4Mbit
4Mbit
256kbit
MODEM
VOL IN
VOL OUT
RX
TX
TONE 1
HS TX
LINETX
MDNRX
CN103
T
R
LINERX
HS RX
12MHz
24MHz
32.256
MHz
32.768
kHz
32.768
kHz
TONE 1
DIGITAL P.C.B
SI,CLK
LITHIUM
BATTERY
COVER
OPEN
PAPER TOP
CN501, CN502
CN511
+5V
+24V
IC506
DRIVER
1
2
3
4
CN104
R1
T1
DC
LOOP
IC510
FLASH
4Mbit
RS232C
18
KX-FM131CE
4.3.
ANALOG UNIT BLOCK DIAGRAM
Change from original page 179 (6.7.1. ANALOG UNIT BLOCK DIAGRAM)
FG
/BELL
T
R
LINERLY
P-SHORT
BREAK
DCN
CPC
HSMIC(+)
HSMIC(-)
HSSP(-)
HSSP(+)
TONE1
16
15
14
13
12
11
10
9
9
8
7
6
5
4
3
2
1
18
17
0/-6
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
19
20
A
5
A
4
A
3
A
2
A
1
D
0/-6
MUTE2
MUTE1
0/-3/-6
0/-3
-20/-30
0/-6/-12
DET
20
ANALOG
DIGITAL
VOX
MLAT
MCLK
MDATA
MODEM
IC505
VOL
ASIC
IC501
SP(+)
SP(-)
1
2
3
4
5
6
7
8
CD
FC2
FC1
GND
VCC
SPMUTE
CN103
LF101
RL101
T101
R129R125
C133
C213
IC101
IC101
C127
C229
R132
R130
R223
C219
R129
C124
C125
C126
C123
R222
R131
R127
C216
C132
R221
R128
R138
R126
R137
R220
C217
C131
C129
D106
Q108
C114
R115
C112
R113
R116
R124
T102
R140
TO LINE
TO
HANDSET
CN104
C251
R661
C638
R663
R662
C649
R673
R701
Q516
C655
R704
R702
R703
C656
C648
R670
R667
C647
R668
R675
R666
R665
C640
C643
C651
R664
R659
IC507
C613
R615
R600
C590
R597
R559
CN503
TO SP
R535
R620
R649
C631
R652
C586
LINE
LINE TX
MONRX
EX-HOOK1
HS
MIC(+)
HSSP(+)
IC551
RL101
DC
LOOP
C144
R153
C143
C245
R152
R247
R248
C247
C248
R254
C246
R255
R256
C244
R258
Q211
IC207-2
R280
R257
IC201
EXT. TEL
CN104
T1
R1
19
KX-FM131CE
4.4. NCU SECTION
(6.8 NCU SECTION)
4.4.1. CPC (Calling Party Control) DETECTION CIRCUIT
Change from original page 182 (6.8.7. CPC (Calling Party Control) DETECTION CIRCUIT)
1. Function
This circuit detects the signal (cuts the current) output from the converter when the other party finishes ICM recording and goes
into the ON-HOOK status.
into the ON-HOOK status.
TAD detects this signal and disconnects the line. When the TAD is operating, corrector of Q201 becomes a low level.
While detecting the CPC signal, corrector of Q201 becomes a high level. When the CPC signal is detected, the TAD operation
stops and the line is disconnected.
stops and the line is disconnected.
4.5. SPECIAL CIRCUIT ON THE ANALOG BOARD......Addition
Please add the following to original page 183 (after 6.8. NCU SECTION)
4.5.1. CURRENT DETECTION CIRCUIT
1. Function
This circuit detects whether the circuit current is flowing or not.
It is also used for Ext. Tel Hook detection.
It is also used for Ext. Tel Hook detection.
2. Circuit Operation
If a circuit current of 10 mA or more flows in the IC201 coil when the unit or Ext. Tel is OFF-Hook, the IC201 interval sensor
detects this current. Then, depending on the direction of the current, the IC201 5 pin or 6 pin switches to a low level.
Next, Q202 or Q203 is turned off, Q201 is turned on, and the Gate Array IC501-154 pin on the digital board switches to a low
level. If the line is cut off, the opposite operation is executed and the IC 501-154 pin switches to a high level.
detects this current. Then, depending on the direction of the current, the IC201 5 pin or 6 pin switches to a low level.
Next, Q202 or Q203 is turned off, Q201 is turned on, and the Gate Array IC501-154 pin on the digital board switches to a low
level. If the line is cut off, the opposite operation is executed and the IC 501-154 pin switches to a high level.
20
KX-FM131CE
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