Pin
Pin Name
Buffer Power supply
5V Tolerant
Signal Name
I/O
Description
160
STB2
MULT3/5
NO
STB2
O Thermal head strobe 2
161
STB3
MULT3/5
NO
OPEN
O Not used
162
STB4
MULT3/5
NO
OPEN
O Not used
163
THDAT
MULT3/5
NO
TH DATA
O Thermal data
164
VSS
DG
Ground
165
MULT3/5
-
+5V
Power supply for THCLK DAT LAT STB
166
THCLK
MULT3/5
NO
TH CLK
O Thermal head clock
167
THLAT
MULT3/5
NO
TH LAT
O Thermal head latch
168
STBNP
3.3V
YES
CIS SEL
169
3.3V
+3.3V
Power supply
170
TXD2/IOP
3.3V
YES
TH ON
O Thermal head 24V ON
171
RXD2/IOP
3.3V
YES
RS
I/O LCD control
172
RTS2/IOP
3.3V
YES
OPEN
O Not used
173
CTS2/IOP
3.3V
YES
CIS ON
O Not used
174
DSR2/IOP
3.3V
YES
MOTOR PO.
I
Motor position detection
175
DCD2/IOP
3.3V
YES
OPEN
O Not used
176
DTR2/IOP
3.3V
YES
OPEN
O Not used
177
RI2/IOP
3.3V
YES
OPEN
O Not used
178
XRSTSWI/IP83
3.3V
YES
PULL DOWN
Pull down
179
KEYIN0
3.3V
YES
KIN0
I/O Key read
180
KEYIN1
3.3V
YES
KIN1
I/O Key read
181
KEYIN2
3.3V
YES
KIN2
I/O Key read document sensor control
182
KEYIN3
3.3V
YES
KIN3
I/O Key read read start position sensor control
183
KEYIN4
3.3V
YES
OPEN
O Not used
184
KEYIN5
3.3V
YES
OPEN
O Not used
185
OPLED
3.3V
YES
OPESEL
OD Operation panel control
186
VSS
DG
GND
187
3.3V
3.3V
OD Power supply
188
KSTART
3.3V
YES
KSTART
OD LCD control
189
KLATCH
3.3V
YES
KLATCH
OD Key scan LCD control
190
KSCLK
3.3V
YES
KSCLK
OD Key scan LCD control
191
KTXD
3.3V
YES
KTXD
I
Key scan LCD control
192
KRXD
3.3V
YES
KRXD
O Document read start position sensor
193
ADSEL1
3.3V
YES
ADSEL1
Thermal head temperature detection trigger
194
VSSC
DG
Ground for analog image process
195
VREFB
Analog
-
VREFB
A/D reference-
196
VREFT
Analog
-
VREFT
A/D re
197
BIAS
Analog
-
BIAS
198
VREFH
Analog
-
VREFH
A/D reference center
199
VDDC
+3.3V
Power supply for analog image process
200
VSSA
DG
Ground for analog image process
201
VDDA
+3.3V
Power supply for analog image process
202
VDDB
+3.3V
Power supply for analog image process
203
VCL
Analog
-
VCL
Clamp level
204
AIN3
Analog
-
AIN3
205
AIN1
Analog
-
AIN1
Analog image signal (CIS output signal input)
206
AMON
Analog
-
OPEN
Not used
207
AIN2
Analog
-
AIN2
Thermistor voltage detection
208
VSSB
DG
Ground for analog image process
104
KX-FT21RS
Summary of Contents for KX-FT21RS
Page 8: ...1 10 CCITT No 1 TEST CHART 8 KX FT21RS ...
Page 9: ...1 11 LOCATION OF CONTROLS 1 11 1 OVERVIEW 1 11 2 CONTROL PANEL 9 KX FT21RS ...
Page 15: ...1 14 2 1 MAINTENANCE LIST 1 14 2 2 MAINTENANCE CYCLE 15 KX FT21RS ...
Page 22: ...2 3 3 Simple Check List 22 KX FT21RS ...
Page 23: ...2 3 4 TROUBLESHOOTING ITEMS TABLE 23 KX FT21RS ...
Page 24: ...2 3 4 1 ADF Auto Document Feed Section 1 No document feed 24 KX FT21RS ...
Page 25: ...2 Paper JAM 25 KX FT21RS ...
Page 27: ...4 Skew 27 KX FT21RS ...
Page 28: ...5 Image is distorted When printing 28 KX FT21RS ...
Page 29: ...6 Black or white vertical lines appear 7 Skewed receiving image 29 KX FT21RS ...
Page 31: ...31 KX FT21RS ...
Page 33: ...2 3 4 2 1 Defective facsimile section 1 Transmit problem 33 KX FT21RS ...
Page 34: ...2 Sometimes there is a transmit problem 34 KX FT21RS ...
Page 36: ...4 The unit can copy but cannot transmit receive 36 KX FT21RS ...
Page 40: ...7 How to output the Journal Report 40 KX FT21RS ...
Page 42: ...Countermeasure 42 KX FT21RS ...
Page 43: ...43 KX FT21RS ...
Page 44: ...44 KX FT21RS ...
Page 45: ...45 KX FT21RS ...
Page 46: ...46 KX FT21RS ...
Page 47: ...47 KX FT21RS ...
Page 48: ...48 KX FT21RS ...
Page 49: ...49 KX FT21RS ...
Page 51: ...1 Entering the remote programming mode and changing service codes 51 KX FT21RS ...
Page 57: ...Normal Wave Patterns 57 KX FT21RS ...
Page 60: ...60 KX FT21RS ...
Page 61: ...NG Example 61 KX FT21RS ...
Page 64: ...1 Defective ITS Integrated Telephone System Section 64 KX FT21RS ...
Page 66: ...2 Troubleshooting Flow Chart 66 KX FT21RS ...
Page 67: ...67 KX FT21RS ...
Page 69: ...2 3 4 6 Operation Board Section 1 No key operation 2 No LCD indication 69 KX FT21RS ...
Page 71: ...2 3 4 8 Read Section Refer to 6 4 4 SCANNING BLOCK 71 KX FT21RS ...
Page 72: ...72 KX FT21RS ...
Page 73: ...2 3 4 9 Thermal Head Section Refer to 6 4 3 THERMAL HEAD 73 KX FT21RS ...
Page 78: ...2 4 6 OTHER 78 KX FT21RS ...
Page 79: ...2 5 TEST FUNCTIONS 79 KX FT21RS ...
Page 82: ...2 6 1 PRINTOUT EXAMPLE 82 KX FT21RS ...
Page 84: ...4 DISASSEMBLY INSTRUCTIONS 84 KX FT21RS ...
Page 85: ...85 KX FT21RS ...
Page 86: ...86 KX FT21RS ...
Page 87: ...87 KX FT21RS ...
Page 88: ...88 KX FT21RS ...
Page 89: ...89 KX FT21RS ...
Page 90: ...90 KX FT21RS ...
Page 91: ...91 KX FT21RS ...
Page 92: ...92 KX FT21RS ...
Page 93: ...93 KX FT21RS ...
Page 94: ...94 KX FT21RS ...
Page 96: ...5 3 FLAT PACKAGE IC INSTALLATION PROCEDURE 5 4 BRIDGE MODIFICATION PROCEDURE 96 KX FT21RS ...
Page 112: ...112 KX FT21RS ...
Page 117: ...6 4 6 3 2 Scanning 6 4 6 3 3 Printing Note See 6 5 SENSERS AND SWITCHES 117 KX FT21RS ...
Page 118: ...6 4 6 3 4 Copying 118 KX FT21RS ...
Page 151: ...10 TERMINAL GUIDE OF THE IC S TRANSISTORS AND DIODES 151 KX FT21RS ...
Page 152: ...11 FIXTURES AND TOOLS 152 KX FT21RS ...
Page 154: ...12 2 UPPER CABINET SECTION 154 KX FT21RS ...
Page 155: ...12 3 LOWER CABINET P C B SECTION 155 KX FT21RS ...
Page 157: ...12 5 ACTUAL SIZE OF SCREWS AND WASHER 157 KX FT21RS ...
Page 158: ...13 ACCESSORIES AND PACKING MATERIALS 158 KX FT21RS ...