Panasonic KX-FP320E / KX-FM330E Simplified Service Manual ▷ View online
17
(Model KX-FP320E/KX-FM330E)
KX-FP320E/KX-FM330E
6.12. SPECIAL CIRCUIT ON THE ANALOG BOARD
6.12.1. CURRENT DETECTION CIRCUIT
1. Function
This circuit detects whether the circuit current is flowing or not. It is also used for CPC detection and Ext. Tel Hook
detection.
detection.
2. Circuit Operation
If a circuit current of 10 mA or more flows in the IC1 coil when the unit or Ext. Tel is OFF-hook, the IC1 internal sensor
detects this current. Then, depending on the direction of the current, the IC1-5 pin or 6 pin switches to a low level.
Then, Q1 or Q2 is turns off, Q18 turns on, and the Gate Array IC4-43 pin on the digital board switches to a low level. If
the line is cut off, the IC4-43 pin switches to a high level.
detects this current. Then, depending on the direction of the current, the IC1-5 pin or 6 pin switches to a low level.
Then, Q1 or Q2 is turns off, Q18 turns on, and the Gate Array IC4-43 pin on the digital board switches to a low level. If
the line is cut off, the IC4-43 pin switches to a high level.
6.12.2. LOW PASS FILTER
1. Function
This circuit is only incorporated into the products designed for the German market. Products for other markets are
shorted by J33. This low pass filter attenuates the 16-kHz account signal from the commutator to eliminate influence on
the conversation and communications.
shorted by J33. This low pass filter attenuates the 16-kHz account signal from the commutator to eliminate influence on
the conversation and communications.
2. Circuit Operation
This low pass filter is an eighth-order active filter, and the cutoff frequency is approximately 4 kHz.
Circuit Diagram
RLY1
C3 R7
B
A
EXT.TEL
CN9(2)
(Digital)
IC4 43
IC4 43
Q2
Q1
Q18
R44
Line
A
B
IC1
1 2 5 6
R192
Circuit Diagram
Deletion
Level
frequency
IC11
IC11
IC12
IC12
C61
C63
C55
C62
C65
C66
C60
C58
R78
R86 R81
R77
R82
R88
R94
R91
J33
R79
C54
dB
0
-48dB/oct
4KHz
RX Signal
input
input
RX Signal
output
output
(Change from original page 176)
18
(Model KX-FP320E/KX-FM330E)
KX-FP320E/KX-FM330E
6.13.2. EXPLANATION OF ANALOG GATE ARRAY (IC103 on the Analog Board)
(Change from original page 178)
Pin No.
Name
Function
I/O
Pin No.
Name
Function
1
DGND
GND (Digital)
41
PROUT1
PRE-AMP1 output
2
BREAK
Controls pulse dialing
O
42
AGND
GND (Analog)
3
MDMRX
FAX RX Signal ON/OFF
O
43
RTONE
Not Used
4 NOT USED
----------
I
44
RIN
Handset receiver AMP input
5
DCN
Detects parallel TEL OFF-hook
I
45
ROUT1
Handset receiver AMP output 1
6 H/S ALC
Detects H/S ALC
I
46
ROUT2
Handset receiver AMP output 2
7
NOT USED
----------
I
47
NOT USED
----------
8
E-RECALL
Controls earth recall relay
O
48
NOT USED
----------
9
P-SHORT
Improves wave form of pulse
dialing
O
49
NOT USED
----------
10
WR
Writes enable
I
50
NOT USED
----------
11
RD
Reads enable
I
51
MICIN
MIC AMP input
12
CS
Chip select
I
52
HSMIC-
Handset MIC AMP (-) input
13
D0
Data In/Out
I/O
53
HSMICOUT
Handset MIC AMP output
14
D1
Data In/Out
I/O
54
HSMIC+
Handset MIC AMP (+) input
15
D2
Data In/Out
I/O
55
NL2IN
Side tone suppressing AMP input
16
D3
Data In/Out
I/O
56
NL2OUT
Side tone suppressing AMP output
17
D4
Data In
I
57
NL2IN
Suppressing sensitivity adjustment
18
RS
Resistor select
I
58
VREF
Reference voltage output
19
RESET
Reset this IC
I
59
LINEIN
Line RX-AMP input
20
DVDD
5V (Digital)
60
VCC
5V (Analog)
21
DGND
GND (Digital)
61
EXIN
EXT AMP input
22
NOT USED
----------
O
62
EXOUT
EXT AMP output
23
NOT USED
----------
O
63
LINEOUT
Line TX-AMP output
24
NOT USED
----------
O
64
VREF2
Reference voltage output
25
NOT USED
----------
O 65
ALCIN
ALC-AMP input
26
LINE-RLY
Controls line relay (RLY1)
O
66
ALCDET
Attack/recovery time adjustment
27
SP-MUTE
Mutes control to speaker AMP
(IC3)
O
67
PROUT2
PRE-AMP2 output
28
NOT USED
----------
I
68
RECIN
Recording signal input
29
BELL
Detects bell signal
I
69
RECPRIN
Recording PRE-AMP input
30
MDMSRX
SP-Phone RX Signal ON/OFF
O
70
RECPROUT
Recording PRE-AMP output
31
32
NOT USED
----------
O
71
LSRXOUT
SP-Phone MIC signal output
NOT USED
----------
O 72
PLYOUT
Play AMP output
33
NOT USED
----------
O
73
PLYIN
Play AMP input
34
35
DVDD
5V (DIGITAL)
74
LSTXOUT
SP-Phone speaker signal output
NOT USED
----------
75
LSTXIN
SP-Phone speaker signal input
36
NOT USED
----------
76
TONE IN1
DTMF monitor signal input
37
NOT USED
----------
77
TONE IN2
Alarm/keytone input
38
SPOUT
Speaker AMP output
78
TONE IN3
Ringing signal input
39
SPPROUT
Speaker PRE-AMP output
79
TONE IN4
Pulse dial monitor signal input
40
SPPRIN
Speaker PRE-AMP (-) input
80
AGND
GND (Analog)
1
2
3
4
5
6
7
8
9
10
11
12
G
F
E
D
C
B
A
H
19
(Model KX-FP320E/KX-FM330E)
KX-FP320E/KX-FM330E
KX-FP320E/KX-FM330E
8.3. PRINTED CIRCUIT BOARD (ANALOG BOARD) (Change from original page 187)
R102
Q16
E
R103
C72
C147
C148
C128
C131
C132
C67
R84
C68
C134
R167
R80
C55
R83
R29
C23
J30
D20
R48
R44
C34
R33
C22
C26
J28
C162
R16
C14
C95
R136
C100
R139
C24
R38
C103
C139
J32
J29
D23
C41
R64
R60
4
5
1
8
C96
R86
4
5
1
8
C130
C7
C8
R9
D2
L9
C10
ZNR1
SA1
IC1
J23
L2
J4
J14
C153
R4
PC1
J31
D22
C39
C158
R57
D21
C25
D16
J26
D29
D27
R75
R130
R65
C83
R128
R124
C44
R74
C52
C47
R59
1
1
4
5
8
C6
C5
C85
C37
C42
C40
R133
C81
C86
J63
C38
C73
R126
C89
R127
R134
R138
C97
C93
R142
R148
C1
13
R150
C101
C122
R154
C1
15
R15
C1
1
PC9
C123
C125
R158
R156
C75
R1
18
D18
D19
C2
R7
R25
R1
1
R14
D10
D14
C18
C12
C17
D5
D15
R28
Q3
E
C19
D1
1
R39
R41
R50
R45
R26
C32
D12
D3
PC8
PC4
PC6
PC2
C56
R31
D13
D4
D17
D9
C13
R19
R35
R40
J10
SA2
J9
J6
J1
J5
J2
CN1
REF-CH
PFUP1048Z
SW1
R96
SW3
C129
C144
D25
R164
C164
C57
R90
CN6
1
8
1
1
1
5
8
1
4
1
1
4
8
5
7
11
11
7
8
14
Q13
D28
OEG
24VDC
POS1
J18
C3
F1
L6
Q5
Q8
Q7
C92
C99
R143
R140
R146 R147
R163
D37
R69
C49
C49
C43
R170
R174
C137
R174
C137
L11
CN9
X1
C121
R160
R160
C154
C124
C124
C118
R72 R68
R109
R111
R107
R67
R116
IC14
IC4
R108
R76
R153
C112
R106
C1000
R157
R149
C117
R152
R152
IC5
C111
C106
C108
1
2
C105
C109
R137
R145
D32
R13
T2
C114
C110
CN3
C74
R105
C84
D30
R129
L10
CN4
4
1
1
2
5
8
R125
D7
C107
R61
R62
R58
R123
IC3
CN5
C45
SW5
CN30
R191
R63
C46
R73
R63
C46
R73
Q14
Q12
D33
C157
Q11
R66
R71
C50 R70
IC10
C51
C53
D34
R193
1
2
RLY3
OEG
24VDC
D6
R51
C140
R93
C59
R92
R172
J52
C66
C145
RA1
RA2
CN7
C165
CN8
IC12
C60
R82
R88
R82
R88
C62 J33
R32
PC5
C63
C54
R162
R162
R81
C58
R77
R78
R79
R77
R78
R79
C61
C120
R161
C119
20
1
41
60
21
80
40
61
IC11
Q6
PC7
R18
PC3
IC2
R95
L7
L8
Q4
Q9
AUTO-CH
PCB-CH
Q18
Q1
R192
Q2
R2
D35
CN20
RLY1
R10
R52
C4
C15
J27
Q10
R42
E
C29
C33
T1
SW4
CN10
J20
J62
1
3
1
2
L3
C1
RLY2
SW2
E
Q17
R97
C69
CN2
Pin No.
10~17
Waveform
5V
0V
(Component View)
(Model KX-FP320E/KX-FM330E)
20
1
2
3
4
5
6
7
8
9
10
11
12
G
F
E
D
C
B
A
H
KX-FP320E/KX-FM330E
KX-FP320E/KX-FM330E
R190
R180
C150
CN1
1
31
R54
IC13
IC15
SP-
SP+
8
1
1
4
8
5
5
4
C30
C102
R141
R49
C156
R56
R53
C36
R47
R55
C126
R151
R1
10
10
C76
C79
C208
R104
R185
R184
R189
R182
R187
R188
R186
C163
R34
C16
C21
R30
R27
R24
R22
R23
R21
C20
R36
R37
R144
C104
C94
R171
C136
R169
R168
C127
R91
C65
R94
R89
R87
R85
C143
R166
J60
J61
R17
R20
C9
R43
R46
D1
C203
J24
J25
J19
J22
J13
J21
L4
L5
J12
C202
R12
R8
C27
C35
R1
17
17
R100
C71
J51
L1
J15
J16
J64
J1
1
J3
J50
J17
R98
R99
C70
R122
C80
R120
R1
19
19
R121
IC6
1
10
20
11
J8
J7
C201
Q15
C133
R165
C64
C152
C151
C149
C146
C142
C141
C138
C135
C98
R131
C87
C155
R183
C160
C159
L38
L37
C207
C90
C88
C91
C161
C48
R1
12
12
C78
R1
15
15
R1
13
13
R1
14
14
C77
R132
C205
C206
C204
C82
L36
L35
R135
R155
R159
C1
16
16
C31
C28
PFUP1048Z
8.4. PRINTED CIRCUIT BOARD (ANALOG BOARD) (Change from original page 188)
(Bottom View)
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