Panasonic KX-F1200 Service Manual And Technical Manual page 137

l KX-F1200
D JAM UNIi
PQLP 10105M
Circuit Diagram
*SVD
-- D2O
R285 : -- I_All+ ONll
CN9 01 I R290 R289 IR288 C232 3 I BATT-
:C210 2 16 "'" p II-'1_. I_. 6
ANALOG IN ,_ 4
lAG (
-_-I_ ANALOG OUT 33
_' ÷5VD lout 1 IC17
NC _ ..I.
I/O POd
ICl
11. ATAS (Automatic Telephone Answering System) SECTION
11-1. MAIN SECTION
1) Function
The ATAS main operation is executed by 1(35and Digital TAM Unit. Control signals are input from gate array IC1.
2) Signal Path and Circuit Operation
(1) OGM/MEMO Record
MIC -_ C120 --_ R159 --> IC8 (12 -_ 14) --> IC5 (16 -+ 13) --> C174 --_ R232 --+ R233 --+ C176 --_ ON9 (3) -+ D-TAM UNIT
(2) ICM Record (ex. Line1)
TEL. Line (Line1) _ NCU Section -+ IC3 [(5)(3)] _ C144 --> R185 -, C132 -_ IC8 (13 _ 14) --+ IC5 (16 -- 13) --> C174 - R232 ,
R233 -+ (3176 --+ CN9 (3) _ D-TAM UNIT
(3) OGM/MEMO/ICM Play to Speaker
D-TAM UNIT --> ON9 (5) --+ C177 --> Q18(C --> E) --> R237 _ C178 --> IC21 (2 _ 1) --+ R244 --- R250 _ C182 -+ IC20 (2 -> 1) -
(3184 -> R252 --> IC12(4 ---> 8, 5) -_ Speaker
(4) OGM/MEMO/ICM to TEL. Line (ex. Line1)
D-TAM UNIT --- ON9 (5) --> R224 --, IC8 (4 --- 5) -_ C164 _ R219 --> R220 -* R217 --> R218--> IC19 (3 --+ 1) --+ R213 --+ C131 _
R170 -+ IC18(6 -> 7) -> C129 --> IC3 (8 --- 15) --->NCU Section (Line1) --> TEL. Line (Liner)
(5) vox
The VOX circuit is the circuit for discrimination of tone or no tone. IC5 pin (2) is Low Level with tone and hight level with no tone.
The role of this explanained in the following.
(_ When no tone is recognized at the time ot ICM recording from the line, the recording is ended. (ex. Line1)
TEL, Line (Line1) _ NCU Section _ IC3 1(5)(3)] -- 0144 -_ R165 -_ C132 _ ICe, (,13 -_ 14) _ IC5 (16 _ vox detection
circuit -_ 2) --" IC1 (89)
(_) When no tone is recognized at the time of OGM recording from the microphone, the recording is ended.
This is done because suitable OGM sending to line is not possible when recording is not done at or above a certain level.
MIC --" R120 --" R159 -_ IC8 (12 --" 14) -" IC5 (16 --" VOX detection circuit -_ 2)---" IC1 (89)
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