Ultrasound Technologies PD1 series, Service Manual

Page: 44 / 75

1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
A B C D
A B C D
J2
1 2 3
C23
2n2F
+
C32
470nF
+
C25
470nF
R24
10K
R38
10K
SK1
1 3 2 4
SK2
1 3 2 4
J5
1 2 3 4 5
VR1 10K
R1
3M3
R39 22K
R6
22K
R4 22K
VR3 20K
VR2 20K
+
C6
100uF
R11 470R
R18 68K
R9
68K
C20 68nF
C5 68nF
LM2907
U3
2
Charge
3
Ib
4
Is
1
Tco
6
Vcc
5
Vcco
8
gnd
7
op
D2
BZX84C6V2
2 3
D4
BZX84C6V2
2 3
TL072
U5
5
I+
6
I-
8 4
7
TL072
U5
3
I+
2
I-
8 4
1
R28 100K
R22
100K
R27
100K
R23
100K
BC848B Q3
2
B
3
C
1
E
C19 1nF
R19
100K
R5
100K
BSS138 Q1
3
D
2
G
1
S
ZM33064Z
U4
1
IN
3
OUT
YEL_3MM D3
2 1
+
C1
100uF
D1
10BQ040
21
C10
470uF
South Wales. NP26 5PS. UK Portskewett, Caldicot Lodge Way
ultratec 2003 Copyright
Drg No:
Date
ECN
Issue
Drawn:
Ultrasound Technologies Ltd
Date:
of
Sheet
Name:
FETATR~1
1
1
J4
1 2
J1
1 2
LM386M
U2
7
1
8
2
M
3
P
6 4
5
+
C16
10uF
+
C17
10uF
R12
10R
R13 10R
Q2
RFD8P05SM
2
D
1
G
3
S
U1
CD4013
3
CLK
5
D
4
RESET
6
SET
2
Q
1
Q
U1
CD4013
11
CLK
9
D
10
RESET
8
SET
12
Q
13
Q
R17
4K7
R16 4K7
+
C4
0u47F
+
C7 0u47F
R15 2K2
R20 2K2
R29 1K0
R21 1K0
R26 1K0
R14 1K0
R2
1K0
+
C11
100uF
+
C15 100uF
+
C14 100uF
+
C26 100uF
+
C29 100uF
C35
100nF
C22
100nF
C21
100nF
CC18 100nF
C13
100nF
C8 100nF
C9 100nF
C24 100nF
C28 100nF
R7 1M
R10 1M
R8 1M
R3 1M
C2 10nF
C34
10nF
C27
10nF
C12
10nF
VccSW
Vcc
probe_power
VccSW
Vcc
probe_power
probe_audio
probe_audio
VccSW
probe_audio
VccSW
probe_audio
Fetatrack 120 series audio unit circuits
June 03
frequency to voltage converter
Waveform / tape recording output
auto off timer
headset
Filtering
Loudspeaker
Volume Control
Data Output Socket
0.5V/KHz
Battery Input
1
NAS
Battery Low
Unit On / Off control