Operating instructions

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Audio Processing Section
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20-Feb-2002 23:30:34
C:\Program Files\Design Explorer 99 SE\rft\t50\t50.Ddb - audio.sch
Title
Size: Number:
Print Date:
File:
Revision:
Sheet of
A3
RF Technology Pty Ltd
Unit 10, 8 Leighton Place
Hornsby, NSW 2077
AustraliaRev. Release Date: Originator:
Rev No. ECO No. Description of Change
TONE+
TONE-
CTCSS_SEL
TONE_DEV_INC
EXT_TONE_SEL
TONE_DEV_U/D
L2-
L2+
L1+
L1-
uPHONE_IN
MOD_OUT
LOOP_DET
LOOP/VOLTS_SEL
T301
AUDIO_XFRMR
1
2 3
4
5 6
7 8
RL300
MR62-12
12V
GND
C301
22uF
D303
BAV99
D304
BAV99
R305
330R
R304
330R
K
2
NC
3
B
6
C
5
E
4
A
1
U300
4N32
R308
2K2
+5D3
GND
T300
AUDIO_XFRMR
GND
R307
4K7
Q300
BSS138
R306
10R
R311
22K
GND
C300
22uF
* C300, and C301 are Bipolar electrolytic capacitors
9
10 11
U301C
DG411
8
7 6
U301B
DG411
R309
560R
R310
560R
TERM_EN2
TERM_EN1
LOOP/VOLTS_SEL
GND
GND
R300
27R
R301
27R
D300
1.5KE11CA
D301
1.5KE11CA
GND
F300
120mA
R302
27R
F301
120mA
R303
27R
LOOP_DET
LINE_IN1
LINE_IN2
uPHONE_IN
AUDIO_OUTMOSI
SCLK
LINEINP_DEN
RESET
LINEINP_ADSEL
LCD_BIAS
LINE_INP
PWRCNTRL
AUDIO_DEV_INC
AUDIO_DEV_U/D
DEV_H_L
PWR_CNTRL_HIGH
Line Input Processing Section
lineinp.sch
TONEP+
TONEP-
TONE_DEV_INC
CTCSS_SEL
SCLK
MOSI
EXT_TONE_SEL
TONE_OUT
TONE_DEV_U/D
TONE_INT
FILTER_OFF
TONE GENERATION SECTION
tonetx.sch
SCLK
MOSI
GND
D3021.5KE11CA
F302
120mA
R313
22K
R314
10K
2
3
1
U302A
LM224
R315
22K
R316
10K
GND
R321
68K
R322
68K
R323
68K
C302
2n2F
C305
10nF
C306
120pF
14
13
12
U302D
LM224
GND GND
R318
120K
R319
120K
R320
120K
MOD_OUT
LINEINP_ADSEL
LINEINP_DSEL
RESET
TERM_EN2
TERM_EN1
GND
5
VL
12
V+
13
V-
4
U301E
DG411
GND
-10V
+10V+5V
LCD_BIAS
LINE_LEVEL_SENSE
R317
1K
GND
D307
BAT54C
+
C304
3u3F
+5V
D305
BAV99
R312
22K
R324
1k
D306
SM4004
V+
4
V-
11
U302E
LM224
+10V
-10V
(NPO) (NPO) (NPO)
TP300
LINE_IN2
TP301
LINE_IN1
C307
100nF
C308
100nF
GND
GND
TP305
MOD_OUT
C309
100nF
C310
100nF
C311
100nF
GND GND
GND
PWRCNTRL
TONE_INT
PWRCNTRL
LINE_INP
FILTER_OFF
C312
1uF
LCD_BIAS
TONE_OUT
R335
22K
R336
22K
AUDIO_DEV_INC
AUDIO_DEV_U/D
R332
68K
2
1
VDD
6
GND
3
INC
5
U/D
4
U303
MAX5161L
-2.5V
R333
1K
R334
NF
+2.5V
9
10
8
U302C
LM224
GND
Q301
MMBT3906
Q302
MMBT3906
R328
10K
R329
10K
R330
47K
-2.5V
+2.5V
+2.5V
R331
47K
-2.5V
AUDIO_DEV_INC
AUDIO_DEV_U/D
R325
47K
-10V
-10V
R326
47K
R327
47K
-10V
*
*
DEV_H_L
PWR_CNTRL_HIGH
TP302
AUDIO_OUT
TP303
TONE_OUT