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Summary of Contents for Panasonic KX-TG6421BX
- Page 1 Telephone Equipment KX-TG6421BX Model No. KX-TGA641BX (for Asia, Middle Near East and other areas) © Panasonic Communications Co., Ltd. 2009. Unauthorized copying and distribution is a viola- tion of law.
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Page 2: Technical Descriptions
KX-TG6421BX/KX-TGA641BX 1 Technical Descriptions 1.1. Block Diagram (Base Unit) - Page 3 KX-TG6421BX/KX-TGA641BX 1.2. Circuit Operation (Base Unit) 1.2.1. Outline Base Unit consists of the following ICs as shown in Block Diagram (Base Unit) (P.2). • DECT BBIC (Base Band IC): IC7 - Handling all the audio, signal and data processing needed in a DECT base unit...
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Page 4: Power Supply Circuit
KX-TG6421BX/KX-TGA641BX 1.2.2. Power Supply Circuit The power is supplied to the DECT BBIC, RF Module, EEPROM and Charge Contact from AC Adaptor (+6.5 V) as shown in Fig.101. The power supply is as follows; • DECT BBIC (IC7): DC Jack (+6.5 V) →D1→ IC1 → IC7 DC Jack (+6.5 V) →D1→... -
Page 5: Transmitter Block
KX-TG6421BX/KX-TGA641BX 1.2.3. Telephone Line Interface <Function> • Bell signal detection • Clip signal detection • ON/OFF hook circuit Bell & Clip (: Calling Line Identification Presentation: Caller ID) signal detection: In the standby mode, Q3 is open to cut the DC loop current and decrease the ring load. -
Page 6: Block Diagram (Handset)
KX-TG6421BX/KX-TGA641BX 1.3. Block Diagram (Handset) -
Page 7: Power Supply Circuit/Reset Circuit
KX-TG6421BX/KX-TGA641BX 1.4. Circuit Operation (Handset) 1.4.1. Outline Handset consists of the following ICs as shown in Block Diagram (Handset) (P.6). • DECT BBIC (Base Band IC): IC1 - All data signals (forming/analyzing ACK or CMD signal) - All interfaces (ex: Key, Detector Circuit, Charge, DC/DC Converter, EEPROM, LCD, RF Power Amp.) -
Page 8: Circuit Operation (Charger Unit)
KX-TG6421BX/KX-TGA641BX 1.5. Circuit Operation (Charger Unit) 1.5.1. Power Supply Circuit The power supply is as shown. -
Page 9: For Schematic Diagram
KX-TG6421BX/KX-TGA641BX 2 Schematic Diagram 2.1. For Schematic Diagram 2.1.1. Base Unit (Schematic Diagram (Base Unit)) Notes: 1. DC voltage measurements are taken with voltmeter from the negative voltage line. 2. The schematic diagrams may be modified at any time with the development of new technology. -
Page 10: Schematic Diagram (Base Unit)
KX-TG6421BX/KX-TGA641BX 2.2. Schematic Diagram (Base Unit) ANT1_TP ANT2_TP ANT_1 ANT_2 C851 C853 W 0.15mm W 0.15mm L 22+/-4mm L 22+/-4mm Beep 1st or 4th layer 1st or 4th layer Bell signal DA802 *R86 W 0.15mm L 22+/-4mm 1st or 4th layer W 0.15mm... - Page 11 KX-TG6421BX/KX-TGA641BX Loop Current LINE_DC *R30 100k (1005) NC C155 6.8k *R13 TP10 *R20 3.9k R116 2.2k 100k +1.8V 5.6M +1.8V 100k GND GND HAK_CL1 5.6M Caller ID Bell signal RX_AF 180k 4.7M 680p *C147 TX _AF 180k 4.7M *C148 680p 1.8V...
- Page 12 KX-TG6421BX/KX-TGA641BX 2.3. Schematic Diagram (Base Unit_Operation) 2APVCC LED902 MEG_LED LED901 ANS_LED KEYS_B KEYIN1 KEYIN2 KEYIN3 KEYS_C KEYS_D KEYS_E ANS1 ERASE MSG2 SKIP MSG1 DOWN LOCAT/INT STOP NC: No Components...
- Page 13 KX-TG6421BX/KX-TGA641BX Memo...
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Page 14: Schematic Diagram (Handset)
KX-TG6421BX/KX-TGA641BX 2.4. Schematic Diagram (Handset) Charge Current BATTERY 5.6n BATT+ 1.8V BATTERY (MAX500mA) C150 BATTERY +1.8V 1.8V BATT- study to X_CLK 3.0V 4.0V CP+3.0V CP+4.0V 3.9k CHG(+) CHARGE Terminal K10u POWER *C38 K10u CHG(-) +1.8V D10p D10p GND_0 K0.1u RSTn VBAT2 +1.8V... - Page 15 KX-TG6421BX/KX-TGA641BX W 0.15mm L 20+/-2mm 3rd layer R807 RXON L801 C827 TP_ANT1 RX_RF C826 RF_RXn *C859 C803 1.5p DA801 RF_RXp W 0.125mm L 7.6mm CP+3.0V Gap 0.125mm W 0.15mm W 0.15mm 1st layer L 5.0mm L 5.0mm 1st layer 1st layer C172 K0.1u...
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Page 16: Schematic Diagram (Charger Unit)
KX-TG6421BX/KX-TGA641BX 2.5. Schematic Diagram (Charger Unit) R1 10 SCHEMATIC DIAGRAM (Charger Unit) -
Page 17: Printed Circuit Board
KX-TG6421BX/KX-TGA641BX 3 Printed Circuit Board 3.1. Circuit Board (Base Unit_MAIN) 3.1.1. Component View R129 R130 C157 R126 C516 C506 R657 C515 C514 C513 C512 C861 R511 R808 R542 C511 C163 R801 R532 C517 R802 C860 C518 C520 C823 R805 IC801... -
Page 18: Bottom View
KX-TG6421BX/KX-TGA641BX 3.1.2. Bottom View... - Page 19 KX-TG6421BX/KX-TGA641BX 3.2. Circuit Board (Base Unit_Operation) 3.2.1. Component View KX-TG6421/6431H PNLB1090Z LED901 ERASE ANS1 LED902 MSG1 MSG2 SKIP STOP LOCAT/INT DOWN KEYS_E KEYS_C KEYIN2 KEYS_B MEG_LED KEYS_D KEYIN3 KEYIN1 ANS_LED 2APVCC...
- Page 20 KX-TG6421BX/KX-TGA641BX Note...
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Page 21: Circuit Board (Handset)
KX-TG6421BX/KX-TGA641BX 3.3. Circuit Board (Handset) 3.3.1. Component View PNLB1103Z TP_ANT1 KX-TGA641 EUDECT KX-TGA106 USDECT RECEIVER RED (EU) BLACK (EU) BLUE (US) WHITE (EU) C70 C152 C71 C138 C139 BLACK L804 C863 C864 C811 C814 C804 C813 R208 R209 L802 C802... - Page 22 KX-TG6421BX/KX-TGA641BX 3.3.2. Bottom View PNLB1103Z KX-TGA641 EUDECT KX-TGA106 USDECT SOFT_A SOFT_B SOFT_C TALK LED8 LED6 DOWN...
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Page 23: Circuit Board (Charger Unit)
KX-TG6421BX/KX-TGA641BX 3.4. Circuit Board (Charger Unit) 3.4.1. Component View 3.4.2. Bottom View TP4 (GND) -
Page 24: Exploded View And Replacement Parts List
KX-TG6421BX/KX-TGA641BX 4 Exploded View and Replacement Parts List 4.1. Replacement Part List Safety Ref. Part No. Part Name & Description Remarks 1. RTL (Retention Time Limited) B1ABCE000009 TRANSISTOR(SI) Note: B1ACGP000007 TRANSISTOR(SI) PQVTBF822T7 TRANSISTOR(SI) The “RTL” marking indicates that its Retention Time is... - Page 25 KX-TG6421BX/KX-TGA641BX Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks ERJ1TYJ3R9U C137 ECUE1H100DCQ 10p ERJ2GEJ101 C141 ECJ0EB0J224K 0.22 ERJ2GEJ102 C145 ECUE1H100DCQ 10p ERJ2GEJ103 C146 ECUE1H100DCQ 10p ERJ2GEJ332 3.3k C147 ECUE1H100DCQ 10p...
- Page 26 KX-TG6421BX/KX-TGA641BX Safety Ref. Part No. Part Name & Description Remarks Safety Ref. Part No. Part Name & Description Remarks (DIODES) C834 F1G1HR50A480 0.5p LED901 PQVDBR1111C LED C859 F1G1H3R0A480 3p LED902 PQVDBR1111C LED C860 ECUE1H100DCQ 10p C861 F1G1H3R0A480 3p 4.1.2. Handset C862 F1G1HR70A480 0.7p...
- Page 27 KX-TG6421BX/KX-TGA641BX Safety Ref. Part No. Part Name & Description Remarks ERJ2GEJ103 ERJ2GEJ103 ERJ2GEJ103 ERJ6RSJR10V ERJ2GEJ103 ERJ2GEJ471 ERJ2GEJ102 ERJ2GEJ332 3.3k ERJ2GEJ103 ERJ2GEJ102 ERJ2GEJ102 ERJ2GEJ101 ERJ2GEJ103 ERJ2GEJ102 ERJ2GEJ122 1.2k ERJ2GEJ820 ERJ2GEJ820 ERJ2GEJ101 R801 ERJ2GEJ681 R802 ERJ2GEJ101 R803 ERJ2GEJ102 R804 ERJ2GEJ102 R805 ERJ2GEJ470...
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