Panasonic KX-FM131RS Instructions for use

©2000 Kyushu Matsushita Electric Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
KX-FM131RS
(for Russia)
Multi-Function Plain Paper FAX
Please file and use this manual together with the service manual for Model No. KX-FP121AL/KX-FM131AL
Order No.KM79910327C3. This Service Manual indicates the main differences between; Original KX-
FP121AL/KX-FM131AL and KX-FM131RS.
Notice the PC interface-related features for KX-FM131 model (marked with “KX-FM131 only” in the original Service
Manual).
ORDER NO. KMF0002386A3

1 INTRODUCTION
1.1. CONTROL PANEL
Change from original page 11 (1.12.2. CONTROL PANEL)
2
KX-FM131RS

1.2. CONNECTIONS
Change from original page 12 (1.13. CONNECTIONS)
Note
When you operate this product, the power outlet should be near the product and easily accessible.
3
KX-FM131RS

2 TROUBLESHOOTING GUIDE
2.1. Program Mode Table
Change from original pages 64~65 (2. Program Mode Table in 2.3.3.3.2. Remote programming)
Code Function Set Value Default Remote
Setting
001 Set date and time mm/dd/yy hh:mm Jan/01/99 NG
002 Your logo --------- None NG
003 Your telephone number --------- None NG
004 Transmission report mode 1:Error / 2:ON / 3:OFF Error OK
006 FAX ring count 1~4 1NG
TAD/FAX ring count 1~4/TOLL SAVER/RINGER OFF 1NG
Not available in TEL/FAX mode --------- --------- NG
010 Recording time 1:VOX/2:1MIN VOX OK
011 Remote ANS ID --------- ID=111 NG
013 Dialing mode 1: Tone / 2:Pulse Tone OK
014 PC link 1:ON / 2:OFF ON OK
018 Film remain --------- --------- NG
022 Auto journal print 1:ON / 2:OFF ON OK
023 Overseas mode ON / OFF OFF OK
025 Delayed transmission ON / OFF OFF NG
030 Silent FAX recognition ring 3 to 6 rings 3OK
031 Ring detection 1:OFF / 2:A / 3:B / 4:C / 5:D OFF OK
036 Rx reduction 1:72% / 2:86% / 3:92% / 4:100% 92% OK
039 LCD contrast 1:Normal / 2:Darker Normal NG
041 Remote FAX activation code ON / OFF ON ID=*9 NG
042 Message alert 1:ON / 2:OFF OFF OK
043 REC. time alert 1:ON / 2:OFF OFF OK
044 Receive alert 1:ON / 2:OFF ON OK
046 Friendly receive 1:ON / 2:OFF ON OK
047 FAX voice guidance 1:ERROR/2:ON/3:OFF ON OK
054 Common greeting MSG. REC. time 1:16s/2:60s 16s OK
058 Original setting 1:NORMAL / 2:LIGHT / 3:DARKER NORMAL OK
060 Message transfer ON / OFF OFF NG
061 Transfer greeting CHECK / RECORD / ERASE CHECK NG
067 ICM monitor 1:ON / 2:OFF ON OK
068 ECM selection 1:ON / 2:OFF ON OK
070 Pager call ON / OFF OFF NG
076 FAX tone 1:ON / 2:OFF ON OK
077 Auto answer mode 1:TAD/FAX 2: FAX Only 3:TEL/FAX TAD/FAX OK
078 TEL/FAX delayed ring 1 to 4 rings 1OK
079 Film detection 1:ON / 2:OFF ON OK
080 Set default YES / NO NO NG
501 Pause time set 001~600 x 100msec 050 OK
502 Recall time 01~99 x 10 msec 70 OK
503 Dial speed 1:10pps / 2:20 pps 10pps OK
510 Vox time 1:6sec / 2:4sec 6sec OK
511 Vox sense 1:HIGH / 2:LOW HIGH OK
520 CED frequency select 1:2100Hz / 2:1100Hz 2100 OK
521 International mode select 1:ON / 2:OFF ON OK
522 Auto standby select 1:ON / 2:OFF ON OK
523 Receive equalizer select 1:0km / 2:1.8km / 3:3.6km / 4:7.2km 0km OK
524 Transmission equalizer select 1:0km / 2:1.8km / 3:3.6km / 4:7.2km 0km OK
533 Setting the number of times that message
transfer is redialed. 00~99 03 OK
534 Setting of the message transfer/pager call
redial interval 001~999 030 OK
550 Memory clear --------- --------- NG
551 ROM check --------- --------- NG
552 DTMF signal tone test 1:ON / 2:OFF OFF OK
553 Monitor on FAX communication 1:OFF / 2:Phase B / 3:ALL OFF OK
554 Modem test --------- --------- NG
555 Scanner test --------- --------- NG
556 Motor test --------- --------- NG
557 LED test --------- --------- NG
558 LCD test --------- --------- NG
4
KX-FM131RS

Code Function Set Value Default Remote
Setting
559 Document jam detection 1:ON / 2:OFF ON OK
561 Key test --------- --------- NG
570 Break % select 1:61% / 2:67% 61% OK
571 ITS auto redial time set 00~99 14 OK
572 ITS auto redial line disconnection time set 001~999sec 30 OK
573 Remote turn-on ring number 01~99 15 OK
580 TAM continuous tone detection 1:ON / 2:OFF ON OK
590 FAX auto redial time set 00~99 05 OK
591 FAX auto redial line disconnection time set 001~999sec 045 OK
592 CNG transmit select 1:OFF / 2:ALL / 3:AUTO ALL OK
593 Time between CED and 300 bps 1:75ms / 2:500ms / 3:1sec 75ms OK
594 Overseas DIS detection 1:1st / 2:2nd 1st OK
595 Receive error limit value 001~999 100 OK
596 Transmit level set -15~00dBm -10 OK
598 Receiving Sensitivity 20~48 43 OK
599 ECM frame size 1:256 / 2:64 256 byte OK
602 Warning list printing 1:ON / 2:OFF ON OK
624 AT ring time out 1:3sec / 2:5sec 3sec OK
717 Transmit speed select 1:14400/ 2:12000/ 3:9600/ 4:7200/
5:4800/ 6:2400 14400bps OK
718 Receive speed select 1:14400/ 2:12000/ 3:9600/ 4:7200/
5:4800/ 6:2400 14400bps OK
719 Ringer off in TEL/FAX mode 1:ON / 2:OFF ON OK
721 Pause tone detect 1:ON / 2:OFF ON OK
722 Redial tone detect 1:ON / 2:OFF ON OK
724 PC-FAX ATD busy tone detect 1:ON / 2:OFF ON OK
731 CPC mode 1:A / 2:B / 3:OFF AOK
732 Auto disconnect 1:350ms / 2:1800ms / 3:OFF 350msec OK
745 Power on film feed 1:ON / 2:OFF ON OK
763 CNG detect time for friendly reception 1:10s / 2:20s / 3:30s 30s OK
771 T1 timer 1:35s / 2:60s 35s OK
774 T4 timer 00~99 × 100msec 00 OK
775 Monitoring of message transfer 1:ON / 2:OFF OFF OK
784 Voice prompt 1:Start --------- NG
815 Sensor & VOX test --------- --------- NG
841 Digital SP-Phone RX & TX check 1:SP-Phone --------- NG
852 Print test pattern --------- --------- NG
853 Top margin 1~9 --------- OK
854 Left margin 1~8 --------- OK
861 A4 size set 1:ON / 2:OFF 1OK
870 Serial port self test --------- --------- NG
880 History list 1:Start --------- NG
881 Journal 2 1:Start --------- NG
882 Journal 3 1:Start --------- NG
890 TEL/FAX ring back tone 1:ON / 2:OFF ON OK
991 Setup list 1:Start --------- OK
994 Journal list 1:Start --------- OK
995 Journal 2 list 1:Start --------- OK
996 Journal 3 list 1:Start --------- OK
998 History list 1:Start --------- OK
999 Service list 1:Start --------- OK
OK means "can set".
NG means "can not set".
Note:
Refer to 2.4.4. SERVICE FUNCTION TABLE for descriptions of the individual codes.
Example:
If you want to set value in the "004 Transmission report mode", press the dial key number 1, 2 or 3 corresponding to the Set
Value you want to select. (1:ERROR/2:ON/3:OFF)
5
KX-FM131RS

2.2. Analog Board Section
Change from original pages 79~80 (2.3.3.5. Analog Board Section)
This chapter provides the testing procedures required for the analog parts. A signal route to be tested is determined depending
upon purposes. For example, the handset TX route begins at the handset microphone and the signal is output to the telephone line.
The signal mainly flowing on this route is analog. You can trace the signal with an oscilloscope. The signal flow on each route is
shown in the Check Sheet here. If you find a specific problem in the unit, for example if you cannot communicate with the H/S, trace
that signal route locally with the following Check Sheet and locate the faulty point.
Note:
{ }: Inside the digital board
6
KX-FM131RS

Note:
{ }: Inside the digital board
7
KX-FM131RS

2.3. USER MODE (The list below is an example of the SYSTEM SETUP
LIST the unit prints out.)
Change from original page 102 (2.4.3. USER MODE)
Note:
The above values are the default values.
8
KX-FM131RS

2.4. SERVICE FUNCTION TABLE
Change from original pages 103~105 (2.4.4. SERVICE FUNCTION TABLE)
Code Function Set Value Effective Range Default Remarks
501 Pause time set X 100 msec 001~600 50
502 Recall time set X 10 msec 01~99 70
503 Dial speed select 1:10 pps 2:20 pps 1, 2 1
510 VOX TIME 1:6 sec 2:4 sec 1, 2 1
511 Vox sense 1:HIGH 2:LOW 1, 2 1When the TAM dose not stop
recording the ICM because noise is
detected on the telephone line,
change this setting to “LOW“.
520 CED frequency select 1:2100 Hz 2:1100 Hz 1, 2 1See the Symptom/
Countermeasure Table for long
distance and international calls in
2.3.3.3.1. Defective facsimile
section.
521 International mode select 1:ON 2:OFF 1, 2 1See the Symptom/
Countermeasure Table for long
distance and international calls in
2.3.3.3.1. Defective facsimile
section.
522 Auto standby select 1:ON 2:OFF 1, 2 1The resolution reverts to the
default when transmission is
complete.
523 Receive equalizer select 1:0 km 2:1.8 km 3:3.6
km 4:7.2 km 1~4 1When the telephone station is far from the unit or reception cannot
be performed correctly, adjust
accordingly.
524 Transmission equalizer select 1:0 km 2:1.8 km 3:3.6
km 4:7.2 km 1~4 1When the telephone station is far from the unit or transmission
cannot be performed correctly,
adjust accordingly.
533 Setting the number of times that
massage transfer is redialed. 00~99 00~99 3Selects the number of times that message transfer is redialed (not
including the first dialing).
534 Setting the message transfer/pager
call redial interval 001~999 sec 001~999 30 Sets the interval of message transfer/pager call redial.
550 Memory clear: To reset the value to the default one, except the top margin (853)
and left margin (854). "START" input"
552 DTMF single tone test 1:ON 2:OFF 1, 2 2See 2.5. TEST FUNCTIONS.
553 Monitor on FAX communication
select 1: OFF 2:PHASE B 3:ALL 1~3 1
554 Modem test See 2.5. TEST FUNCTIONS.
555 Scan check See 2.5. TEST FUNCTIONS.
556 Motor test 0See 2.5. TEST FUNCTIONS.
557 LED test See 2.5. TEST FUNCTIONS.
558 LCD test See 2.5. TEST FUNCTIONS.
559 Document jam detection select 1:ON 2:OFF 1, 2 1See 2.2.1. Paper Jam.
561 KEY test See 2.5. TEST FUNCTIONS.
570 BREAK % select 1:61% 2:67% 1, 2 1Sets the % break of pulse dialing
according PBX.
571 ITS auto redial time set X number of times 00~99 14 Selects the number of times that
ITS is redialed (not including the
first dial).
572 ITS auto redial line disconnection
time set X second 001~999 30 Sets the interval of ITS redialing.
573 Remote turn-on ring number set X number of rings 01~99 15 Sets the number of rings before
the unit starts to receive a
document in the TEL mode.
580 TAM continuous tone detection 1:ON 2:OFF 1, 2 1ON : Stops TAM operation when
Dial tone, etc. are detected.
590 FAX auto redial time set X number of times 00~99 5Selects the number of redial times
during FAX communication (not
including the first dial).
591 FAX auto redial time disconnection
time set X second 001~999 45 Sets the FAX redial interval during FAX communication.
592 CNG transmit select 1: OFF 2:ALL
3:AUTO 1~3 2Lets you select the CNG output during FAX transmission. ALL:
CNG is output at phase A. AUTO:
CNG is output only when automatic
dialing is performed. OFF: CNG is
not output at phase A.
9
KX-FM131RS

Code Function Set Value Effective Range Default Remarks
593 Time between CED and 300bps 1: 75 msec 2:500
msec 3:1 sec 1~3 1See the Symptom/Countermeasure Table for long distance and
international calls in 2.3.3.3.1.
Defective facsimile section.
594 Overseas DIS detection select 1:detects at the 1st
time 2:detects at the
2nd time
1, 2 1See the Symptom/Countermeasure
Table for long distance and
international calls in 2.3.3.3.1.
Defective facsimile section.
595 Receive error limit value set X Number of times 001~999 100 Sets the number of acceptable
error lines when the FAX
reconstructs the received data.
596 Transmit level set X dBm - 15~00 10 Selects the FAX transmission level.
598 Receiving sensitivity 43= -43 dBm 20~48 43 Used when there is an error
problem. See the
Symptom/Countermeasure Table
for long distance and international
calls in 2.3.3.3.1. Defective
facsimile section.
599 ECM frame size 1:256 2:64 1, 2 1
602 Warning LIST Printing 1:ON 2:OFF 1, 2 1Used to print a caution list when
setting the TEL/FAX mode and ring
detection.
624 AT ring time out 1:3sec 2:5sec 1, 2 1
717 Transmit speed selection 1:14400BPS
2:12000BPS
3:9600BPS
4:7200BPS
5:4800BPS
6:2400BPS
1~6 1Adjusts the speed to start training
during FAX transmission.
718 Receive speed selection 1:14400BPS
2:12000BPS
3:9600BPS
4:7200BPS
5:4800BPS
6:2400BPS
1~6 1Adjusts the speed to start training
during FAX reception.
719 Ringer off in TEL/FAX mode 1:ON 2:OFF 1, 2 1Sets the ringer switch off when a
call is received in the TEL/FAX
mode.
721 Pause tone detect 1:ON 2:OFF 1, 2 1Selects the tone detection for
pause in dialing.
722 Redial tone detect 1:ON 2:OFF 1, 2 1Selects the tone detection mode
after redialing.
724 PC-FAX ATD busy tone detect 1:ON 2:OFF 1, 2 1
731 CPC mode 1:A 2:B 3:OFF 1~3 1Sets the CPC signal detection
mode from the converter
732 AUTO disconnect cancel time 1:350 ms 2:1.8 sec
3:OFF 1~3 1 "Sets to "2" when the auto disconnect circuit operates and
cuts the line."
745 Power ON film feed 1:ON 2:OFF 1, 2 1When the power is turned on, the
film is wound to take up any slack.
763 CNG detect time for friendly
reception 1:10 sec 2:20 sec 3:30 sec 1~3 3Selects the CNG detection tome of friendly reception.
771 T1 timer 1:35 sec 2:60 sec 1, 2 1Sets a higher value when the
response from the other party
needs more time during FAX
transmission.
774 T4 timer × 100 msc 00~99 00 Use this function when delay
occurs on the line and
communication (ex. mobile comm)
does not work well.
775 Monitoring of message transfer 1:ON 2:OFF 1, 2 2If set to ON a message can be
monitored from this unit’s SP-
PHONE when transferring a
message.
784 Voice prompt test You can hear the voice prompt
from speaker after pressing
"START" key.
815 Sensor & Vox check See 2.5. TEST FUNCTIONS.
841 Digital SP-phone check See 2.3.3.5.1. Digital
Speakerphone.
852 Print test pattern See 2.5. TEST FUNCTIONS.
853 Top margin 1~9 --------
854 Left margin 1~8 --------
861 A4 size set 1:ON 2:OFF 1, 2 1Used only at the factory.
870 Serial port self test See 2.5. TEST FUNCTIONS.
10
KX-FM131RS

Code Function Set Value Effective Range Default Remarks
880 History list See 2.4.6. HISTORY.
881 Journal 2 list See 2.4.7.3. PRINTOUT
EXAMPLE.
882 Journal 3 list See 2.4.7.3. PRINTOUT
EXAMPLE.
890 TEL/FAX 1st ring back tone 1:ON 2:OFF 1, 2 1Selects whether the TEL/FAX 1st
ring back tone is ON or OFF in the
TEL/FAX mode.
11
KX-FM131RS

2.5. SERVICE MODE SETTINGS (Example of a printed out list)
Change from original page 106 (2.4.5. SERVICE MODE SETTINGS)
Note:
The above values are the default values.
2.6. BUTTON CODE TABLE
Change from original page 117 (2.5.2. BUTTON CODE TABLE)
Note:
These codes (00, 01) are only for the data in the History Report.
12
KX-FM131RS

3 CIRCUIT OPERATIONS
3.1. Descriptions of Pin Distribution (IC501)
Change from original pages 146~148 (Descriptions of Pin Distribution (IC501) in 6.3. CONTROL SECTION)
Descriptions of Pin Distribution (IC501)
NO. SIGNAL I/O POWER SUPPLIED VOLTAGE DESCRIPTION
1AIN1 A3.3V CCD IMAGE SIGNAL INPUT
2AIN2 A3.3V THERMISTOR TEMPERATURE WATCH INPUT
3AIN3 A3.3V -----------
4 AMON A 3.3V ANALOG SIGNAL MONITOR TERMINAL
5VSSB GND POWER SOURCE (ANALOG GND)
6VDDB 3.3V POWER SOURCE (ANALOG +3.3V)
7VDD(3.3V/B) 3.3V/BATT POWER SOURCE (+3.3V/LITHIUM BATTERY)
8X32OUT O3.3V/BATT RTC (32.768KHz) CONNECTION
9X32IN I3.3V/BATT RTC (32.768KHz) CONNECTION
10 VSS GND GND
11 XBACEN I5V/BATT BACKUP ENABLE
12 VDD (5V/B) 5V/BATT POWER SOURCE (+5V/LITHIUM BATTERY)
13 XRAMCS O5V/BATT RAM (IC504) CHIP SELECT
14 XRAMCS2 O5V/BATT NOT USED
15 FTG O5V SH SIGNAL OUTPUT FOR CIS
16 F1 O5V 01 SIGNAL OUTPUT FOR CIS
17 F2/OP O5V OUTPUT PORT (VOLOUTEN)
18 FR/OP O5V OUTPUT PORT (RESERVED)
19 VIDRST/IOP O5V OUTPUT PORT (RESERVED)
20 SPHCLK/IOP I5V INPUT PORT (RESERVED)
21 DARKON/IOP I5V INPUT PORT (JOG1)
22 ADSEL2/IOP I5V INPUT PORT (JOG2)
23 CPC I5V INPUT PORT (RESERVED)
24 BELL O5V OUTPUT PORT (LINE RLY)
25 VDD (5V) 5V POWER SOURCE (+5V)
26 VSS GND POWER SOURCE (GND)
27 RVN I5V INPUT PORT (FILM END SENSOR SIGNAL)
28 IRDATXD/IOP O5V OUTPUT PORT (RESERVED)
29 IRDARXD/
IOP80 I5V OUTPUT PORT (RESERVED)
30 TXD/IOP O5V RS232C I/F (TXP) KX-FM131 ONLY
31 RXD/IOP O5V RS232C I/F (RXD) KX-FM131 ONLY
32 XRTS/IOP O5V RS232C I/F (XRTS) KX-FM131 ONLY
33 XCTS/IOP O5V RS232C I/F (XCTS) KX-FM131 ONLY
34 XDSR/IOP O5V RS232C I/F (XDSR) KX-FM131 ONLY
35 DCD/IOP O5V RS232C I/F (DCD) KX-FM131 ONLY
36 XDTR/IOP O5V RS232C I/F (XDTR) KX-FM131 ONLY
37 RI/CLK/IOP O5V NOT USED
38 TONE1 5V TONE OUTPUT
39 TONE2 5V TONE OUTPUT
40 VOLUREF 5V ANALOG REF VOLTAGE
41 VOLUOUT 5V VOLUME OUTPUT
42 VOLUIN 5V VOLUME INPUT
43 MIDAT/IOP A5V MIDAT
44 MICLK/IOP A5V MICLK
45 MILAT/IOP A5V MILAT
46 XRESCS1 O5V OUTPUT PORT (BREAK)
47 IOP90 O5V OUTPUT PORT (SPMUTE)
48 VSS GND POWER SOURCE (GND)
49 VDD (5V) 5V POWER SOURCE (+5V)
50 XNMI I5V HIGH FIXED
51 CBUSY2 O5V OUTPUT PORT (RESERVED)
52 CSO O5V OUTPUT PORT (RESERVED)
53 CBUSY1 I5V OUTPUT PORT (RESERVED)
54 CCLK I5V OUTPUT PORT (RESERVED)
55 CSI I5V OUTPUT PORT (RESERVED)
56 IOP91 O5V OUTPUT PORT (RESERVED)
57 IOP92 O5V OUTPUT PORT (RESERVED)
58 FMEMCS/IOP O5V OUTPUT PORT (FCS)
13
KX-FM131RS

NO. SIGNAL I/O POWER SUPPLIED VOLTAGE DESCRIPTION
59 FMEMDO/IOP O5V OUTPUT PORT (ALE)
60 FMEMDI/IOP O5V OUTPUT PORT (CLE)
61 FMEMCLK/IOP I5V INPUT PORT (R/B)
62 XRESCS3/OP O5V OUTPUT PORT (OP RESET)
63 20KOSC/IOP O5V RESERVED
64 XHOLDAK O5V NOT USED
65 VDD (3.3V) 3.3V POWER SOURCE (+3.3V)
66 XOUT O3.3V SYSTEM CLOCK (24MHz)
67 XIN I3.3V SYSTEM CLOCK (24MHz)
68 VSS GND POWER SOURCE (GND)
69 VDD (5V) 5V POWER SOURCE (+5V)
70 XTEST O5V 24MHz CLOCK
71 CPUCLK O5V NOT USED
72 TEST1 I5V HIGH FIXED
73 TEST2 I5V HIGH FIXED
74 TEST3 I5V HIGH FIXED
75 TEST4 I5V HIGH FIXED
76 XMDMINT I5V MODEM INTERRUPT
77 XMDMCS O5V MODEM CHIP SELECT
78 VSS GND POWER SOURCE (GND)
79 VDD (3.3V) 3.3V POWER SOURCE (3.3V)
80 XWAIT I5V LOW FIXED
81 HOLD I5V LOW FIXED
82 HSTRD/IOP O5V FLASH MEMORY READ
83 HSTWR/IOP O5V FLASH MEMORY WRITE
84 XOPRBE O5V NOT USED
85 ADR15 O5V CPU ADDRESS BUS 15 (NOT USED)
86 ADR14 O5V CPU ADDRESS BUS 14 (NOT USED)
87 ADR13 O5V CPU ADDRESS BUS 13 (NOT USED)
88 XRAS/IOP O5V DRAM (IC503) ROW ADDRESS STROBE
89 XCAS1/IOP O5V DRAM (IC503) CULUM ADDRESS STROBE
90 XCAS2/IOP O5V OUTPUT PORT (MODRST)
91 VSS GND POWER SOURCE (GND)
92 VDD (3.3V) 3.3V POWER SOURCE (3.3V)
93 XRESCS2 O5V OUTPUT PORT (CSBR)
94 DB3 I/O 5V CPU DATA BUS 3
95 DB2 I/O 5V CPU DATA BUS 2
96 DB4 I/O 5V CPU DATA BUS 4
97 DB1 I/O 5V CPU DATA BUS 1
98 DB5 I/O 5V CPU DATA BUS 5
99 DB0 I/O 5V CPU DATA BUS 0
100 DB6 I/O 5V CPU DATA BUS 6
101 DB7 I/O 5V CPU DATA BUS 7
102 VSS GND POWER SOURCE (GND)
103 VDD (5V) 5V POWER SOURCE (5V)
104 XROMCS I/O 5V ROM (IC502) CHIP SELECT
105 RD O5V CPU RD
106 WR O5V CPU WR
107 ADR0 O5V CPU ADDRESS BUS 0
108 ADR1 O5V CPU ADDRESS BUS 1
109 ADR2 O5V CPU ADDRESS BUS 2
110 ADR3 O5V CPU ADDRESS BUS 3
111 ADR4 O5V CPU ADDRESS BUS 4
112 ADR5 O5V CPU ADDRESS BUS 5
113 ADR6 O5V CPU ADDRESS BUS 6
114 ADR7 O5V CPU ADDRESS BUS 7
115 ADR8 O5V CPU ADDRESS BUS 8
116 ADR9 O5V CPU ADDRESS 9
117 ADR10 O5V CPU ADDRESS 10
118 ADR11 O5V CPU ADDRESS 11
119 ADR12 O5V CPU ADDRESS 12
120 VSS GND POWER SOURCE (GND)
121 VDD (5V) 5V POWER SOURCE (+5V)
122 RBA0 O5V ROM/RAM BANK ADDRESS 0
123 RBA1 O5V ROM/RAM BANK ADDRESS 1
124 RBA2 O5V ROM/RAM BANK ADDRESS 2
125 RBA3 O5V ROM/RAM BANK ADDRESS 3
14
KX-FM131RS

NO. SIGNAL I/O POWER SUPPLIED VOLTAGE DESCRIPTION
126 RBA4 O5V ROM/RAM BANK ADDRESS 4
127 RBA5 O5V ROM/RAM BANK ADDRESS 5
128 RBA6/IOP96 O5V OUTPUT PORT (RESERVED)
129 IOP95 O5V OUTPUT PORT (SEN LED ON)
130 IOP94 O5V OUTPUT PORT (RESERVED)
131 IOP93 I5V OUTPUT PORT (CIS LED ON)
132 XRESET I5V RESET INPUT
133 XORESET O5V RESET OUTPUT
134 VDD (5V) 5V POWER SOURCE (+5V)
135 VSS GND POWER SOURCE (GND)
136 XRESETI I5V RESET INPUT
137 WDERR O5V WATCHED ERROR OUTPUT SIGNAL
138 XRSTSWI I5V INPUT PORT (MPOS)
139 XRSTSWO O5V OUTPUT PORT (VOLIN SEL2)
140 XRESETO O5V NOT USED
141 IOP O5V THERMAL HEAD POWER ON/OFF CONTROL
142 STB1 O5V STROBE SIGNAL OUTPUT TO THERMAL
HEAD
143 STB2 O5V STROBE SIGNAL OUTPUT TO THERMAL
HEAD
144 VDD (3.3V) 3.3V POWER SOURCE (3.3V)
145 VSS GND POWER SOURCE (GND)
146 STB3 O5V STROBE SIGNAL OUTPUT TO THERMAL
HEAD
147 STB4 O5V NOT USED
148 STBNP I5V INPUT PORT (BELL)
149 THDAT O5V RECORDED IMAGE OUTPUT
150 THCLK O5V CLOCK OUTPUT FOR DATA TRANSFER
151 THLAT O5V PULSE OUTPUT FOR DATA LATCH
152 RM0/IOP I5V INPUT PORT (P-TOP)
153 RM1/IOP I5V INPUT PORT (DCN)
154 RM2/IOP I5V INPUT PORT (CPC)
155 RM3/IOP O5V OUTPUT (NOT USED)
156 RXE/IOP I5V INPUT PORT (NOT USED)
157 TMO O5V MOTOR A PHASE
158 VDD (5V) 5V POWER SOURCE (+5V)
159 VSS GND POWER SOURCE (GND)
160 TM1/IOP O5V MOTOR B PHASE
161 TM2/IOP O5V MOTOR /A PHASE
162 TM3/IOP O5V MOTOR /B PHASE
163 TXE/IOP O5V MOTOR ENABLE SIGNAL
164 KSTART O5V OPERATION PANEL CONTROL
165 KLATCH O5V OPERATION PANEL CONTROL
166 KSCLK O5V OPERATION PANEL CONTROL
167 KTXD O5V OPERATION PANEL CONTROL
168 KRXD I5V OPERATION PANEL CONTROL
169 ADSEL1 O5V CHANNEL SELECT SIGNAL FOR AIN2
170 VSSC GND POWER SOURCE (ANALOG GND)
171 VDDC 3.3V POWER SOURCE (ANALOG +3.3V)
172 VSSA GND POWER SOURCE (ANALOG GND)
173 VDDA 3.3V POWER SOURCE (ANALOG +3.3V)
174 VREFB A3.3V A/D CONVERTER’S ZERO STANDARD
VOLTAGE OUTPUT
175 VCL A3.3V ANALOG PART STANDARD VOLTAGE SIGNAL
176 VREFT A3.3V A/D CONVERTER’S FULL SCALE VOLTAGE
OUTPUT
15
KX-FM131RS

3.2. ANALOG UNIT BLOCK DIAGRAM Change from original page 179 (6.7.1. ANALOG UNIT BLOCK DIAGRAM)
FG
/BELL
T
R
LINERLY
BREAK DCNCPC
HSMIC(+)
HSMIC(-)
HSSP(-)
HSSP(+)
TONE1
1615
141312111098
7654321 1817
0/-6
21222324252627
282930313233343536 1920
A
5A 4A 3A 2A 1D
0/-6
MUTE2
MUTE1
0/-3/-6
0/-3
-20/-30
0/-6/-12
DET
20
ANALOGDIGITAL
VOX
MLAT
MCLK
MDATA
MODEM
IC505
VOL
ASIC
IC501
SP(+)
SP(-)
1
2
3
45
6
7
8CD
FC2
FC1
GND
VCC
SPMUTE
CN103
LF101
RL101
T101
R129 R125
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
PC103
R124
T102
R140
TO LINE
TO
HANDSET
CN104
C251
R661
C638
R663
R662
C649 R673
R701
Q516
C655R704
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
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
16
KX-FM131RS

3.3. LINE AMPLIFIER AND SIDE TONE CIRCUIT
Change from original page 181 (6.8.5. LINE AMPLIFIER AND SIDE TONE CIRCUIT)
1.Circuit Operation
The reception signal output from the line transformer T101 is input to pin (6) of IC101 via C126 and R131, and then the signal
is amplified at pin (7) of IC101 and sent to the reception system at 5dB.
The transmission signal goes through C131 and R137 and enters IC101-pin (2), where the signal is amplified to about 20.8dB.
Then, it is output from pin (1) of IC101 and transmitted to T101 via C133, R219 and R125. If the side tone circuit is not applied,
the transmission signal will return to the reception amplifier via C126, R131 and R222. When the side tone circuit is active, the
signal output from IC101 pin (1) passes through C133, R221, R216, R127, C123, R223 and C219 and goes into the amplifier
IC101 pin (5). This circuit is used to cancel the transmission return signal.
3.4. CALLING LINE IDENTIFICATION CIRCUIT →→ Deleted
Change from original pages 183~184 (6.8.8. CALLING LINE IDENTIFICATION CIRCUIT)
17
KX-FM131RS

3.5. OPERATION BOARD SECTION
Change from original page 187 (6.12. OPERATION BOARD SECTION)
The unit consists of a LCD (Liquid crystal display), KEYs and LEDs (light-emitting diodes). They are controlled by the Gate Array
(IC301) and ASIC (IC501: on the DIGITAL BOARD). (Fig.-a)
Fig.-a
Key Matrix
18
KX-FM131RS

4 SCHEMATIC DIAGRAM (ANALOG CIRCUIT)
Change from original page 200 (9.2. SCHEMATIC DIAGRAM (ANALOG CIRCUIT))
12V
HANDSET
FAX TX
5V
0V
EX-TEL OFF-HOOK
FAX TX Signal FAX RX Signal
12V
HANDSET, SP-Phone
FAX RX
Handset TX Signal Handset RX Signal
KX-FM131RS
19

KX-FM131RS
20