Panasonic KX-TCD725RUM Service Manual page 2

725rum.html
6.2.6 PULSE DIALING (SEE Fig. 20)
6.2.7 AUDIO CIRCUITS (SEE Fig. 20)
6.2.8 DISCONNECT (SEE Fig. 20)
6.2.9 POWER SUPPLIES (SEE Fig. 21)
6.3 RF MODULE
6.3.1 RF MODULE (SEE BLOCK DIAGRAM Fig.22)
7 CIRCUIT OPERATION (HANDSET)
7.1 THE BASE BAND SECTION
7.1.1 INTRODUCTION
7.1.2 THE BASE-BAND INTEGRATED CIRCUIT (BBIC)
7.1.3 FLASH ROM (SEE Fig. 24)
7.1.4 EEPROM (SEE Fig. 24)
7.1.5 FACTORY SERIAL PORT (SEE Fig. 24)
7.1.6 AUDIO PATH - TX AUDIO (SEE Fig. 25)
7.1.7 AUDIO PATH - RX AUDIO (SEE Fig. 25)
7.1.8 CLOCK GENERATION (SEE Fig. 25)
7.1.9 KEYBOARD (SEE Fig. 26)
7.1.10 LCD DISPLAY, AND DISPLAY DRIVER (SEE Fig. 26)
7.1.11 BATTERY SUPPLY (SEE Fig. 27)
7.1.12 2.65V REGULATOR (SEE Fig. 27)
7.1.13 BATTERY CHARGING CIRCUIT (SEE Fig. 27)
7.2 RF SECTION
7.2.1 BLOCK DIAGRAM RF SECTION (HANDSET)
8 CHECK PROCEDURE (BASE UNIT)
8.1 EQUIPMENT REQUIRED
8.2 INITIAL POWER TESTS
8.3 SET THE CLOCK FREQUENCY
8.4 LOOPBACK TESTS
8.5 TELEPHONE LINE TESTS
8.6 CHARGE CURRENT TESTS
8.7 TAM VOICE PROMPT DOWN LOAD
9 CHECK PROCEDURE (HANDSET)
9.1 EQUIPMENT REQUIRED
9.2 INITIAL POWER TESTS
9.3 SET CLOCK FREQUENCY
9.4 LOOPBACK TESTS
10 TROUBLESHOOTING GUIDE
10.1 HANDSET: DOES NOT OPERATE
10.2 HANDSET: LINK
10.3 HANDSET: DOES NOT LINK
10.4 BATTERY DOES NOT CHARGE
10.5 NO VOICE RECEPTION
10.6 NO VOICE TRANSMISSION
10.7 BASE UNIT: DOES NOT LINK
10.8 BASE UNIT : CALLER ID PROBLEMS
10.9 BASE UNIT: TAM VOICE PROMPT PROBLEMS
11 CABINET AND ELECTRICAL PARTS LOCATION (BASE UNIT)
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