Pin
Pin Name
Buffer Power supply
5V Tolerant
Signal Name
I/O
Description
93
TEST3
3.3V
NO
+3.3V
Test pin. fixed High
94
XOUT
3.3V
-
XOUT
24MHz oscillator
95
XIN
3.3V
NO
XIN
24MHz oscillator
96
VSS
DG
Ground
97
3.3V
+3.3V
Power supply
98
TEST4
3.3V
NO
+3.3V
Test pin. fixed High
99
XHSTWR/IOP41
3.3V
YES
RLY
O Tel line relay control
100
XOPRBE/MUX/OP53
3.3V
-
SP-MUTE
Speaker mute control
101
XRAS/IOP42
3.3V
NO
OPEN
O Not used
102
XCAS1/IOP43
3.3V
NO
OPEN
O Not used
103
XCAS2/IOP44
3.3V
NO
OPEN
O Not used
104
DB3
3.3V
YES
D3
Data bus
105
DB2
3.3V
YES
2
Data bus
106
DB4
3.3V
YES
4
Data bus
107
DB1
3.3V
YES
1
Data bus
108
DB5
3.3V
YES
5
Data bus
109
DB0
3.3V
YES
0
Data bus
110
DB6
3.3V
YES
6
Data bus
111
DB7
3.3V
YES
D7
Data bus
112
XROMCS
3.3V
-
XROMCS
ROM chip select
113
XRD
3.3V
-
/RD
Read signal output
114
3.3V
+3.3V
Power supply
115
XWR
3.3V
-
/WR
Write signal output
116
ADR0
3.3V
-
A0
Address bus
117
ADR1
3.3V
-
1
Address bus
118
ADR2
3.3V
-
2
Address bus
119
VSS
DG
Ground
120
ADR3
3.3V
-
3
Address bus
121
ADR4
3.3V
-
4
Address bus
122
ADR5
3.3V
-
5
Address bus
123
ADR6
3.3V
-
6
Address bus
124
ADR7
3.3V
-
7
Address bus
125
ADR8
3.3V
-
8
Address bus
126
ADR9
3.3V
-
9
Address bus
127
ADR10
3.3V
-
10
Address bus
128
VSS
DG
Ground
129
3.3V
+3.3V
Power supply
130
ADR11
3.3V
-
11
Address bus
131
ADR12
3.3V
-
12
Address bus
132
RBA0
3.3V
-
A13
Bank address
133
RBA1
3.3V
-
14
Bank address
134
RBA2
3.3V
-
15
Bank address
135
RBA3
3.3V
-
16
Bank address
136
RBA4
3.3V
-
17
Bank address
137
RBA5/OP
3.3V
-
18
Not used
138
RBA6/IOP
3.3V
NO
19
O Not used
139
XRESCS1/OP72
3.3V
-
OPEN
Not used
140
XRESCS2/OP71
3.3V
-
OPEN
Not used
141
XMDMCS/OP
3.3V
-
OPEN
Not used
142
VSS
DG
Ground
143
XRESCS3/OP52
3.3V
-
OPEN
Not used
144
20KOSC/IOP56
3.3V
YES
OPEN
O Not used
145
ADR13
3.3V
-
OPEN
Not used
146
ADR14
3.3V
-
OPEN
Not used
147
3.3V
+3.3V
Power supply
148
ADR15
3.3V
-
OPEN
Not used
149
RM0/IOP00
3.3V
YES
T5
O Motor control
150
RM1/IOP01
3.3V
YES
T4
O Motor control
151
RM2/IOP02
3.3V
YES
T3
O Motor control
152
RM3/IOP03
3.3V
YES
T2
O Motor control
153
RXE/IP04
3.3V
YES
T0
O Motor control
154
TM0/IOP10
3.3V
YES
LEDON
O CIS LED control
155
TM1/IOP11
3.3V
YES
OPEN
O Not used
156
TM2/IOP12
3.3V
YES
OPEN
O Not used
157
TM3/IOP13
3.3V
YES
OPEN
O Not used
158
TXE/IP14
3.3V
YES
PULL DOWN
I
Pull down
159
STB1
MULT3/5
NO
STB1
O Thermal head strobe 1
103
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 ...