KX-T7665AL / KX-T7665X CONTENTS Page Page 1 ABOUT LEAD FREE SOLDER (PbF: Pb free) 10.3. LED CIRCUIT 1.1. SUGGESTED PbF SOLDER 10.4. RESET CIRCUIT 1.2. HOW TO RECOGNIZE THAT Pb FREE SOLDER IS 10.5. POWER SUPPLY CIRCUIT USED 10.6. DATA COMMUNICATION 2 FOR SERVICE TECHNICIANS 10.7.
KX-T7665AL / KX-T7665X 1 ABOUT LEAD FREE SOLDER (PbF: Pb free) Note: In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that contains lead. We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin, (Sn), Silver, (Ag), and Copper, (Cu).
KX-T7665AL / KX-T7665X 2 FOR SERVICE TECHNICIANS ICs and LSIs are vulnerable to static electricity. When repairing, the following precautions will help prevent recurring malfunctions. 1. Cover the plastic parts boxes with aluminum foil. 2. Ground the soldering irons. 3. Use a conductive mat on the worktable.
KX-T7665AL / KX-T7665X 5 CONNECTION Caution: The availability of D-XDP function depends on the software version of the connected Business Telephone System. Consult your dealer for more details about D-XDP.
KX-T7665AL / KX-T7665X 6 DISASSEMBLY INSTRUCTIONS 1. Remove the Stand. 2. Remove 5 Screws (A). 3. Remove the Cabinet Cover. 4. Remove the Connector from the Main Board. 5. Remove 2 Screws (A). 6. Remove the Main Board and the LCD from the Cabinet Body.
KX-T7665AL / KX-T7665X 7 HOW TO REPLACE A FLAT PACKAGE IC 7.1. PREPARATION 7.3. REMOVING SOLDER FROM BETWEEN PINS · PbF (: Pb free) Solder · Soldering Iron 1. Add a small amount of solder to the bridged pins. Tip Temperature of 700°F ± 20°F (370°C ± 10°C) 2.
KX-T7665AL / KX-T7665X 10 CIRCUIT OPERATIONS 10.1. KEY INPUT CONTROL CIRCUIT The key data is under the matrix control by 20 to 23(KEYOUT) and 28 to 35(KEYIN) of IC6. The key information outputted from KEYOUT is inputted into KEYIN, when the key is pressed.
KX-T7665AL / KX-T7665X 10.2. LCD CONTROL CIRCUIT The LCD data is output from pins 52 to 58 of IC6. LCD contrast adjustment is performed by the circuit composed of R603 and R604. The contrast is determined only by the voltage level between pin 2 and pin 3 of CN5. Higher potential makes the contrast high.
KX-T7665AL / KX-T7665X 10.3. LED CIRCUIT The lighting of the LED is controlled by pin 14 to 18 (Row) and pin 8 to 13 (Colum) of IC2. The LED lights up in a dynamic lighting system. The duty ratio is 1/8 (ON time 1.5ms).
KX-T7665AL / KX-T7665X 10.4. RESET CIRCUIT Reset Signal is outputted from IC7 and inputted into IC2, IC3 and IC6 at the connection of TEL cord. 10.5. POWER SUPPLY CIRCUIT This circuit converts the voltage supplied from PBX into the power supply voltage of +3.3V by IC1 (Switching Regulator IC).
KX-T7665AL / KX-T7665X 10.6. DATA COMMUNICATION Function The data communication circuit serves the following functions: Information exchanger between PBX and proprietary telephone, key input information as well as data for the LED control, LCD control, voice data, etc. This information is continuously exchanged at all times.
KX-T7665AL / KX-T7665X 10.7. DXDP COMMUNICATION Function This circuit performs the same communication as DXDP-compatible DPT and PBX communication connected with DXDP port. Circuit Operation The data to Slave DPT is outputted from pin 33 and 34 of IC2 and sent by Transistor Q2 and Q3.
KX-T7665AL / KX-T7665X 10.8. ANALOG CIRCUIT This circuit performs the setting of the call path/vol. adjustment in each call mode by IC4. The audio gain of each call is determined by download data from PBX. · IC2 sends each audio data to IC3 by PCM interface.
KX-T7665AL / KX-T7665X 11 IC DATA 11.1. IC2 I/O Setting Pull-up Contents of Control Remark Processing Built-in chip select Built-in Read Built-in Write WAITN Wait INTN Interrupt out CLM5 LED column 5 CLM4 LED column 4 CLM3 LED column 3...
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KX-T7665AL / KX-T7665X I/O Setting Pull-up Contents of Control Remark Processing DVRL Comp. Ref. Comp. Input DVRH Comp. Ref. DDX0 Tx DATA OUT0 DDX1 Tx DATA OUT1 PVRL Comp. Ref. Comp. Input PVRH Comp. Ref. PDX0 Tx DATA OUT0 PDX1...
KX-T7665AL / KX-T7665X 11.2. IC6 I/O Setting Pull-up Contents of Control Remark Processing not in use not in use OSC2 not in use OSC1 8.192MHz clock from IC2 TEST not in use Reset/ Reset input P20/IRQ4 CODEC chip select P21/SCK1...
KX-T7665AL / KX-T7665X 15 REPLACEMENT PARTS LIST 1. RTL (Retention Time Limited) Ref. Part No. Part Name & Description Remarks Note: PQAS57P03Z SPEAKER The marking (RTL) indicates that the Retention Time is PSJS02P15Z CONNECTOR, 2 PIN PSUS1026Z TORSION SPRING limited for this item.
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KX-T7665AL / KX-T7665X Ref. Part No. Part Name & Description Remarks Ref. Part No. Part Name & Description Remarks (TRANSISTORS) R112 ERJ3GEYJ562 5.6K PSVTUMS1NTR TRANSISTOR(SI) R113 ERJ3GEYJ682 6.8K B1HFCFA00008 TRANSISTOR(SI) R114 ERJ3GEYJ103 XP4601 TRANSISTOR(SI) R115 ERJ3GEYJ472 4.7K 2SC4081R TRANSISTOR(SI) R116...
KX-T7665AL / KX-T7665X 18 WAVEFORM Pin42 of IC2 and Pin8 of IC6 Rest signal Pin42 of IC2 and Pin8 of IC6 Pin48 of IC2 16.384MHz Pin45 of IC2 8.196MHz...
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KX-T7665AL / KX-T7665X Pin36 of IC2 Communication waveform Pin4 to 7 of CN5 Communication waveform Pin3 and 6 of IC3 PCM interface waveform between IC3 and IC2...
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KX-T7665AL / KX-T7665X Pin8 and 10 of IC4 PCM interface waveform between IC4 and IC3 Pin31 of IC2 Communication waveform...