6 CIRCUIT OPERATIONS
6.1. CONNECTION DIAGRAM
+24V
+24V
+24V
GND
GND
GND
+5V
NC
COM
LATCH
STB1
GND
VDD
TH
CLOCK
GND
STR2
SI
COM
A
B
NA
NB
CO
MOTOR
SENSOR
V.LED
G.LED
CLK
GND
GND
GND
ST
SEL
+5V
SIG
CIS
+24V
D-GND
+5VD
+5VA
A-GND
BELL
EX-HOOK
RELAY
PAPER
RX
JACK
JACK
VSS
VDD
VO
RS
R/W
E
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
NC
+5V
FG
OPESE
RS
E
KIN0
KIN1
KIN2
KIN3
KSTAR
KSCLK
KLATC
KTXD
KRXD
DG
NC
PO
WER SUPPL
Y
BO
AD
THERMAL HEAD
DIGITAL
BOARD
ANALOG
BOARD
OPERA
TION
P
ANEL
SPEAKER
HANDSET
LCD
TO TEL LINE
TO EX TEL
1
2
3
4
5
6
1
2
3
4
5
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
1
2
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
11
1
2
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
10
11
12
13
14
1
2
3
4
5
6
7
8
9
10
11
10
9
8
7
6
5
4
3
2
1
6
5
4
3
2
1
CN1
CN102
CN9
TX
HOOK-IN
SP-MUTE
BREAK
DTMF-IMP
P-SHORT
HS-ALC
HS-TX
SP-OUT
HS-RX
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
CN202
CN10
CN3
CN5
CN6
CN7
CN2
CN1
CN3
CN201
CN1
CN2
CN8
CN4
CN101
SP+
SP-
97
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 ...