1 ABOUT LEAD FREE SOLDER (PbF: Pb free) 5
1.1. SUGGESTED PbF SOLDER
5
1.2. HOW TO RECOGNIZE THAT Pb FREE SOLDER IS
USED
6
2 FOR SERVICE TECHNICIANS
7
3 CAUTION
8
3.1. SAFETY PRECAUTIONS
8
3.2. INSULATION RESISTANCE TEST
8
3.3. BATTERY CAUTION
8
3.4. CAUTION
8
4 SPECIFICATIONS
9
4.1. GENERAL DESCRIPTION
9
4.2. CHARACTERISTICS
9
4.3. SYSTEM CAPACITY
9
5 SYSTEM OVERVIEW
10
5.1. SYSTEM COMPONENTS
10
5.2. SYSTEM CONNECTION DIAGRAM
11
6 NAMES AND LOCATIONS
12
7 CONNECTION
12
7.1. SERIAL INTERFACE CONNECTION
12
8 DISASSEMBLY INSTRUCTIONS
13
8.1. DISASSEMBLY INSTRUCTION
13
9 BLOCK DIAGRAM
16
9.1. SYSTEM BLOCK DIAGRAM
16
9.2. POWER BLOCK DIAGRAM
17
9.3. KX-TES824LA/KX-TEM824LA 1AP BLOCK DIAGRAM
17
9.4. KX-TEM824LA 2AP BLOCK DIAGRAM
18
9.5. KX-TES824LA/KX-TEM824LA POWER SUPPLY UNIT
BLOCK DIAGRAM
18
10 EXPLANATION OF BLOCK DIAGRAM
19
10.1. MAIN UNIT (KX-TES824LA/KX-TEM824LA)
19
11 CIRCUIT OPERATION
21
11.1. POWER SUPPY CIRCUIT
21
11.2. CO INTERFACE CIRCUIT
23
11.3. CROSS POINT SWITCH CIRCUIT
27
11.4. INTERCOM CIRCUIT
29
11.5. POWER FAILURE THROUGH CALL SWITCHING
CIRCUIT
30
11.6. DATA COMMUNICATION CIRCUIT
31
11.7. CONTROL CIRCUIT
33
11.8. TONE GENERATOR CIRCUIT
34
11.9. DTMF GENERATOR CIRCUIT
35
11.10. DTMF RECEIVER CIRCUIT
36
11.11. INT CALLID INTERFACE CIRCUIT
37
11.12. MODEM INTERFACE CIRCUIT
37
11.13. USB INTERFACE CIRCUIT
38
11.14. OGM INTERFACE CIRCUIT
38
11.15. RINGING SIGNAL GENERATO R CIRCUIT
39
11.16. SMDR INTERFACE CIRCUIT
39
11.17. DOORPHON E CARD INTERFACE (KX-TE8246 1X)
40
11.18. OGM CARD INTERFACE (KX-TE8249 1X)
40
11.19. BUILT in VOICE MESSAGE CARD INTERFACE (KX-
TE82492X)
41
11.20. CALL ID CARD INTERFACE (KX-TE8249 3X)
41
12 TROUBLESHOOTING GUIDE
42
12.1. NO OPERATION (Check POWER SUPPLY BOARD,
MAIN BOARD)
42
12.2. NO DIAL TONE (KX-TES824LA, MAIN BOARD OF KX-
TEM824LA)
43
12.3. CANNOT DIAL (KX-TES824LA, MAIN BOARD OF KX-
TEM824LA)
44
12.4. CANNOT CALL EXTENSION (KX-TES824LA, MAIN
BOARD OF KX-TEM824LA)
45
12.5. CANNOT USE PROPRIETARY TELEPHONE (KX-
TES824LA, MAIN BOARD OF KX-TEM824LA)
45
12.6. CANNOT RECEIVE INCOMING CALL (KX-TES824LA,
MAIN BOARD OF KX-TEM824LA)
45
12.7. CANNOT SEND DTMF DIALING (KX-TES824LA, MAIN
BOARD OF KX-TEM824LA)
46
12.8. CANNOT RECEIVE CALL DIAL TONE (KX-TES824LA,
MAIN BOARD OF KX-TEM824LA)
46
12.9. CANNOT SEND A HOLD ON MUSIC (KX-TES824LA,
MAIN BOARD OF KX-TEM824LA)
47
12.10. NO DIAL TONE (SUB BOARD OF KX-TEM824 LA)
47
12.11. CANNOT DIAL (SUB BOARD OF KX-TEM824 LA)
48
12.12. CANNOT CALL EXTENSION (SUB BOARD OF KX-
TEM824LA)
48
12.13. CANNOT USE PROPRIETA RY TELEPHON E (SUB
BOARD OF KX-TEM824LA)
49
12.14. CANNOT RECEIVE INCOMING CALL (SUB BOARD OF
KX-TEM824LA)
49
12.15. CANNOT SEND DTMF DIALING (SUB BOARD OF KX-
TEM824LA)
49
12.16. CANNOT RECEIVE CALL DIAL TONE (SUB BOARD OF
KX-TEM824LA)
50
12.17. CANNOT SEND A HOLD ON MUSIC (SUB BOARD OF
KX-TEM824LA)
50
13 IC DATA
51
13.1. IC700
51
13.2. IC6
53
14 TERMINAL GUIDE OF ICS, TRANSISTORS AND DIODES
55
15 HOW TO REPLACE A FLAT PACKAGE IC
56
15.1. PREPARATION
56
15.2. REMOVAL PROCEDURE
56
15.3. INSTALLATION PROCEDURE
56
15.4. REMOVING SOLDER FROM BETWEEN PINS
56
16 FIXTURES AND TOOLS
57
17 CABINET AND ELECTRICAL PARTS LOCATION
58
18 ACCESSORIES AND PACKING MATERIALS
59
19 REPLACEMENT PARTS LIST (KX-TES824LA/KX-TEM824LA)
60
19.1. CABINET AND ELECTRICAL PARTS
60
19.2. ACCESSORIES AND PACKING MATERIALS
60
CONTENTS
Page Page
2
KX-TES824LA / KX-TEM824LA /
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