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TABLE OF CONTENTS
PAGE
1 ORIGINAL SERVICE MANUAL INFORMATION ----------3
2 REPLACEMENT PARTS LIST ---------------------------------3
2 REPLACEMENT PARTS LIST ---------------------------------3
2.1. REFERENCE CHART ------------------------------------3
2.2. ORIGINAL AND NEW PARTS
2.2. ORIGINAL AND NEW PARTS
COMPARISON LISTS ------------------------------------3
3 CHANGES (Suffix Code: E or later) -------------------------4
3.1. Technical Descriptions ------------------------------------4
3.1.1. Block Diagram (Base Unit)--------------------------4
3.1.2. Circuit Operation (Base Unit)-----------------------5
3.1.3. Block Diagram (Handset)----------------------------7
3.1.4. Circuit Operation (Handset)-------------------------8
3.1.5. Signal Route --------------------------------------------9
3.1.2. Circuit Operation (Base Unit)-----------------------5
3.1.3. Block Diagram (Handset)----------------------------7
3.1.4. Circuit Operation (Handset)-------------------------8
3.1.5. Signal Route --------------------------------------------9
3.2. Troubleshooting Guide---------------------------------- 10
3.2.1. Check Power ----------------------------------------- 10
3.2.2. Check Battery Charge------------------------------ 11
3.2.3. Bell Reception---------------------------------------- 11
3.2.4. Troubleshooting by Symptom (Base Unit
3.2.2. Check Battery Charge------------------------------ 11
3.2.3. Bell Reception---------------------------------------- 11
3.2.4. Troubleshooting by Symptom (Base Unit
and Charger Unit) ----------------------------------- 12
3.2.5. Troubleshooting by Symptom (Handset) ------ 13
3.3. Measurements and Adjustments --------------------- 16
3.3.1. Adjustment Standard (Base Unit) --------------- 16
3.3.2. Adjustment Standard (Handset) ----------------- 17
3.3.2. Adjustment Standard (Handset) ----------------- 17
3.4. Schematic Diagram-------------------------------------- 18
3.4.1. Schematic Diagram (Base Unit) ----------------- 18
3.4.2. Schematic Diagram (Handset) ------------------- 20
3.4.2. Schematic Diagram (Handset) ------------------- 20
3.5. Printed Circuit Board ------------------------------------ 23
3.5.1. Circuit Board (Base Unit_Main)------------------ 23
3.5.2. Circuit Board (Handset)---------------------------- 25
3.5.2. Circuit Board (Handset)---------------------------- 25
3.6. Miscellaneous --------------------------------------------- 27
3.6.1. Terminal Guide of the ICs, Transistors and
Diodes-------------------------------------------------- 27
3.7. Replacement Parts List --------------------------------- 28
3.7.1. Base Unit ---------------------------------------------- 28
3.7.2. Handset ------------------------------------------------ 29
3.7.2. Handset ------------------------------------------------ 29
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