1 LOCATION OF CONTROLS 4
2 DISPLAY 5
3 CONNECTION 6
3.1. Connecting the Handset 6
3.2. Connecting the Telephone Line Cord 6
3.3. Connecting a Communication Device 7
4 SETTINGS 8
4.1. Selecting the Dialing Mode 8
4.2. Time Adjustment 9
4.3. Setting the LCD Contrast 10
4.4. Selecting the Ringer Volume 10
5 SPECIAL FEATURES 11
5.1. FLASH Button 11
5.2. Selecting the Flash Time 11
5.3. Setting the Pin Code 12
5.4. Dial Lock 13
5.5. Call Restriction 14
5.6. How to Release the Establishment of Dial Lock 15
6 DISASSEMBLY INSTRUCTIONS 16
7 TROUBLE SHOOTING GUIDE 17
7.1. Service Hints 17
7.2. Pulse Dialing Problems 17
7.3. Tone Dialing Problems (Handset) 18
7.4. No Ringing Sound When Ring Signal is Input. 18
7.5. In Use LED is Not On 19
7.6. When the both lines are held in the Conference mode;
Line LED are not Green 19
7.7. Does Not Hold 20
8 BLOCK DIAGRAM 21
9 CIRCUIT OPERATION 22
9.1. Reset Circuit 22
9.2. Telephone Line Interface 23
9.3. Ringer Circuit 23
9.4. Tone Detect 23
9.5. In Use Detector Circuit 24
9.6. Hold Circuit 25
9.7. Speakerphone Circuit 26
10 HOW TO SET THE FLASH TIME AND REDIAL TIME 27
10.1. Flash Time 27
10.2. Redial Time 27
11 IC BLOCK DIAGRAM 28
11.1. IC801 28
11.2. Speakerphone IC Data (IC601) 29
11.3. Ringer IC Data (IC1, IC22) 30
12 MODULE BLOCK DIAGRAM 31
12.1. LCD MODULE BLOCK 31
12.2. CONNECTOR PIN ASSIGNMENT 31
13 HOW TO REPLACE FLAT PACKAGE IC 32
13.1. Preparation 32
13.2. Procedure 32
13.3. Modification Procedure of Bridge 32
14 CABINET AND ELECTRICAL PARTS LOCATION 33
15 ACCESSORIES AND PACKING MATERIALS 34
16 TERMINAL GUIDE OF THE ICs TRANSISTORS AND DIODES
35
17 REPLACEMENT PARTS LIST 36
17.1. Base Unit 36
17.2. ACCESSORIES AND PACKING MATERIALS 40
18 FOR SCHEMATIC DIAGRAM (SCHEMATIC DIAGRAM (BASE
UNIT)) 41
19 SCHEMATIC DIAGRAM (BASE UNIT) 42
19.1. Main (Suffix A) 42
19.2. Main (Suffix B) 46
19.3. Operation 50
CONTENTS
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