Read Panasonic KX-TG7851RUH / KX-TG7851RUJ / KX-TG7851RUR / KX-TG7852RU1 / KX-TG7861RUH / KX-TG7861RUW / KX-TG7862RU2 / KX-TGA785RUB / KX-TGA785RUH / KX-TGA785RUJ / KX-TGA785RUR / KX-TGA785RUW Service Manual online
KX-TG7851RUJ
KX-TG7851RUR
KX-TG7852RU1
KX-TG7861RUH
KX-TG7861RUW
KX-TG7862RU2
KX-TGA785RUB
KX-TGA785RUH
KX-TGA785RUJ
KX-TGA785RUR
KX-TGA785RUW
Digital Cordless Answering System
2 :
H : Grey Version
J : Beige Version
R : Dark Red Version
W: White Version
1 (TG7851)
1 (TG7861)
2 (TGA785)
1 (TGA785)
Up to 6
KX-TG7852
KX-TG7861
KX-TG7862
handset and a charger.
(Base Unit)
public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting
to service a product. Products powered by electricity should be serviced or repaired only by experienced professional
technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone
else could result in serious injury or death.
in the Schematic Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that
these critical parts should be replaced with manufacturer's specified parts to prevent shock, fire or other hazards.
Do not modify the original design without permission of manufacturer.
Standard leaded, (Pb), solder can be used as usual on boards without the PbF mark.
When this mark does appear, please read and follow the special instructions described in this manual on the
use of PbF and how it might be permissible to use Pb solder during service and repair work.
L The illustrations in this Service Manual may vary slightly from the actual product.
2.2. About Lead Free Solder (Pbf:Pb free)---------------- 5
4 Technical Descriptions ----------------------------------------- 8
4.2. Circuit Operation (Base Unit) --------------------------- 9
4.4. Circuit Operation (Base Unit) -------------------------- 11
4.4.2. Flash Memory (IC601) (for KX-TG7861
4.4.4. Power Supply Circuit--------------------------------12
4.4.5. Telephone Line Interface---------------------------13
4.4.6. Transmitter/Receiver--------------------------------13
4.6. Circuit Operation (Handset)----------------------------15
4.6.2. Power Supply Circuit/Reset Circuit--------------15
4.6.3. Charge Circuit ----------------------------------------15
4.6.4. Battery Low/Power Down Detector--------------15
4.6.5. Speakerphone ----------------------------------------15
6 Installation Instructions ---------------------------------------18
7 Operating Instructions-----------------------------------------18
8.1.2. Handset ------------------------------------------------21
8.2.2. Introduction--------------------------------------------23
8.2.3. EEPROM contents ----------------------------------23
8.3.2. Resetting only handset -----------------------------24
9.1.2. Check Battery Charge ------------------------------27
9.1.3. Check Link---------------------------------------------28
9.1.4. Check the RF part -----------------------------------31
9.1.5. Check Handset Transmission --------------------34
9.1.6. Check Handset Reception-------------------------34
9.1.7. Check Caller ID --------------------------------------34
9.1.8. Bell Reception ----------------------------------------35
9.1.9. Check TAM Operation (for KX-TG7861
9.3.2. Troubleshooting for Speakerphone ------------- 41
10.1.2. Handset------------------------------------------------ 45
10.1.3. Charger Unit ------------------------------------------ 46
11.2. The Setting Method of JIG (Base Unit) ------------- 48
11.2.2. How to install Batch file into P.C. ---------------- 49
11.2.3. Commands-------------------------------------------- 49
11.4.2. How to install Batch file into P.C. ---------------- 52
11.4.3. Commands-------------------------------------------- 52
11.7.2. Handset------------------------------------------------ 56
12.1.2. How to Remove the IC----------------------------- 58
12.1.3. How to Install the IC -------------------------------- 59
12.1.4. How to Remove a Solder Bridge ---------------- 59
12.2.2. Caution------------------------------------------------- 60
12.2.3. How to Remove the Shield Case---------------- 60
12.2.4. How to Install the Shield Case ------------------- 61
12.3.2. Handset------------------------------------------------ 62
13.1.2. Handset (Handset)---------------------------------- 63
13.2.2. KX-TG7861RU--------------------------------------- 66
13.4. Handset----------------------------------------------------- 70
14.1.2. Bottom View ------------------------------------------ 74
14.3.2. Bottom View ------------------------------------------ 78
15.1.2. KX-TG7861 ------------------------------------------- 80
15.3. Cabinet and Electrical Parts (Charger Unit) ------- 82
15.4. Accessories------------------------------------------------ 83
15.5. Replacement Part List ---------------------------------- 84
15.5.2. Handset ------------------------------------------------ 87
15.5.3. Charger Unit ------------------------------------------ 88
15.5.4. Accessories ------------------------------------------- 89
15.5.5. Screws ------------------------------------------------- 89
15.5.6. Fixtures and Tools----------------------------------- 89