KX-TG8051RUB, KX-TG8051RUW, KX-TG8051RU1, KX-TG8051UAB, KX-TG8051CAB, KX-TG8052RUB, KX-TG8052RUW, KX-TGA806RUB, KX-TGA806RUW, KX-TGA806RU1 - Panasonic Telephone Service Manual Supplement (repair manual). Page 2

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TABLE OF CONTENTS
PAGE
1 ORIGINAL SERVICE MANUAL INFORMATION ----------3
2 REPLACEMENT PARTS LIST ---------------------------------3
2.1. REFERENCE CHART ------------------------------------3
2.2. ORIGINAL AND NEW PARTS COMPARISON
LISTS----------------------------------------------------------3
3 CHANGES (Suffix Code: D 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
3.2. Troubleshooting Guide---------------------------------- 11
3.2.1. Check Power ----------------------------------------- 11
3.2.2. Check Battery Charge------------------------------ 12
3.2.3. Bell Reception---------------------------------------- 12
3.2.4. Troubleshooting by Symptom (Base Unit
and Charger Unit) ----------------------------------- 13
3.2.5. Troubleshooting by Symptom (Handset) ------ 14
3.3. Measurements and Adjustments --------------------- 17
3.3.1. Adjustment Standard (Base Unit) --------------- 17
3.3.2. Adjustment Standard (Handset) ----------------- 18
3.4. Schematic Diagram-------------------------------------- 20
3.4.1. Schematic Diagram (Base Unit) ----------------- 20
3.4.2. Schematic Diagram (Handset) ------------------- 22
3.5. Printed Circuit Board ------------------------------------ 25
3.5.1. Circuit Board (Base Unit_Main)------------------ 25
3.5.2. Circuit Board (Handset)---------------------------- 27
3.6. Miscellaneous --------------------------------------------- 29
3.6.1. Terminal Guide of the ICs, Transistors and
Diodes-------------------------------------------------- 29
3.7. Replacement Parts List --------------------------------- 30
3.7.1. Base Unit ---------------------------------------------- 30
3.7.2. Handset ------------------------------------------------ 31
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