8.6. TONE GENERATION CIRCUIT
(1) FUNCTION
All system tones including COL, extension, busy, DTMF signal and key-in tones are sent from Pins 60 of IC2 and controls the
path by the Analog Switch (IC8).
(2) CALLING TONES FROM COL AND EXT.
For a calling tone from a CO line or extension, the single row tone signal is output from Pin 60 of IC2 and the tone volume is
controlled by transistors Q999.
Ringer Volume Control
Level
OFF
LOW
HIGH
Q999
OFF
ON*
OFF
*CAUTION:
It is ON with ringer sound and it is OFF with no ringer sound regardless of the ringer volume.
18
KX-T7565AL / KX-T7565AL-B
Summary of Contents for KX-T7565AL
Page 3: ...3 LOCATION OF CONTROLS 3 KX T7565AL KX T7565AL B ...
Page 22: ...9 TROUBLE SHOOTING GUIDE 9 1 NO OPERATION 22 KX T7565AL KX T7565AL B ...
Page 24: ...9 4 SPEAKER PHONE TROUBLE 9 5 TONE DIAL TROUBLE 24 KX T7565AL KX T7565AL B ...
Page 25: ...9 6 HANDSET TROUBLE 25 KX T7565AL KX T7565AL B ...
Page 28: ...11 TERMINAL GUIDE OF IC S TRANSISTORS AND DIODES 28 KX T7565AL KX T7565AL B ...
Page 29: ...12 CABINET AND ELECTRICAL PARTS LOCATION 29 KX T7565AL KX T7565AL B ...
Page 30: ...13 ACCESSORIES AND PACKING MATERIALS 30 KX T7565AL KX T7565AL B ...
Page 34: ...34 KX T7565AL KX T7565AL B ...
Page 36: ...KX T7565AL KX T7565AL B 36 ...
Page 39: ...39 KX T7565AL KX T7565AL B H KXT7565ALL4 KXT7565ALBL4 Printed in Japan ...
