NAD C 272 Service Manual - page 6
DRAFT
CIN
11
COUT
9
COUT
10
RST
12
Q4
7
Q5
5
Q6
4
Q7
6
Q8
14
Q9
13
Q10
15
Q12
1
Q13
2
Q14
3
VCC
16
GND
8
U801
CD4060
CLK
11
D
12
SD
10
CD
13
Q
9
Q
8
U803B
74HC74
CLK
3
D
2
SD
4
CD
1
Q
5
Q
6
7
14
U803A
74HC74
8
9
U802D
74HC14
10
11
U802E
74HC14
1
2
7
14
U802A
74HC14
3
4
U802B
74HC14
5
6
U802C
74HC14
12
13
U802F
74HC14
R802
10K
Q801
2SC1815
R803
10K
R804
10K
R810
100K
R814
200K
R801
2M
R805
10K
R806
10K
R807
10K
R813
1M
R811
100K
R808
10K
R809
10K
R816
10K
R815
10K
R817
10K
R819
10K
R818
10K
Q802
2SC1815
Q803
2SC1815
C803
0.1uF
C807
2.2uF
C806
0.1uF
D801
1N4148
R812
1M
C802
0.1uF
+5V
+5V
+5V
+5V
+5V
+5V
C801
0.1uF
C805
0.1uF
C804
0.1uF
1 2 3 4 5 6
CZ804
6PIN
1
2
3
CZ801
3PIN
+5V
1
2
3
4
CZ802
4PIN
1
2
3
4
CZ803
4PIN
+5V
OUTPUT
IN SENSE
TRIG IN
3
1
2
Q804
2SA1015
HS4_C272_B007 V4.0-ATO.SCH
C272
R901
1M
R902
1M
R910
10K
R907
30M
R909
10K
R911
1M
C906
10pF
C904
100nF
C909
0.1uF
1
2
D903
1N4148
1
2
D904
1N4148
1
2
D905
1N4148
1
2
D906
1N4148
1
2
D901
1N4148
1
2
D907
1N4148
1
2
D911
1N4148
+5V
+5V
+5V
C901
100nF
C903
100nF
C905
100nF
C902
100nF
R908
30M
C907
10pF
1
2
D908
1N4148
1
2
D909
1N4148
1
2
D910
1N4148
1
2
D912
1N4148
1
2
D902
1N4148
1
2
D913
1N4148
R906
100K
R903
100K
R905
100K
R904
100K
3
2
1
8
4
U901A
LF353
5
6
7
U901B
LF353
1
2
C908
100nF
1
2
3
CZ901
3PIN
1
2
3
CZ902
3PIN
S_LCH
S_RCH
1
2
3
CZ903
3PIN
1
3
4
2
5
6
S901
Q901
2SC1815GR
R913
100k
R912
100k
+5V
1
2
C910
100n
1
2
3
3PIN
1
2
3
3PIN
1 2 3 4 5 6
6PIN
R1101
0
R1102
47
LED1106
LED1105
R1105
1K
R1104
1K
SC
BG
+18V
AGND
LED1104
LED1103
LED1102
Q1103
2SA1015
Q1102
2SA1015
Q1101
2SA1015
R1103
510
TS1101
GND
+5V
TS
LED_SENSE
LED_TRIG
LED_TS
GREEN
GREEN
GREEN
GREEN
AMBER
GREEN/AMBER/RED
INSENSE BORAD
ATO BORAD
TACT SWITCH&LED BORAD
LED1101
PWR
TO MAIN BOARD CZ712
TO MAIN BOARD CZ711
TO STANDBY BOARD CZ706
TO MAIN BOARD CZ706A
1
2
3
CB901
3PIN
1
2
3
CB902
3PIN
TO MAIN BOARD CZ61 PIN4
TO MAIN BOARD CZ61 PIN6
1
2
3
CB903
3PIN
1
2
3
CB903A
3PIN
P1001
AC INLET
1
2
CZ1001
2PIN
1
2
C1001
4.7nF1000V
1
2
CB1001
2PIN
1
2
3
CB1101A
3PIN
1
2
3
CB1102A
3PIN
1
2
CB1001A
2PIN
1
2
3
4
CB802
4PIN
1
2
3
4
CB803
4PIN
1 2 3 4 5 6
CB804
6PIN
1
2
3
4
CB803A
4PIN
1 2 3
4
CB802A
4PIN
TO STANDBY BOARD CZ704
AC INPUT BOARD
TO STANDBY BOARD CZ705
1 2 3
CZ1002
2PIN
1 2 3
CB1002
2PIN
1
2
C912
220uF/16V
R914
10K
1
2
C911
220uF/16V
ADD R914,C808,C911,C912
1
2
C808
220uF/16V
1 2 3
CZ1003
2PIN
1 2 3
CB1003
2PIN
1 2 3 4 5
CB705
5PIN
S1001
ROCK SWITCH
1 2 3
CB1002
2PIN
1 2 3 4 5
CB705
5PIN
(AH VER.)
(C VER.)
TO MAIN BOARD CZ61 PIN5
TO MAIN BOARD CZ61 PIN5
PN U1 CHANGED TO U801
NAD ELECTRONICS INTERNATIONAL
Document
Sheet:
Date:
Date:
Date:
Drafted
PL Checked
Approved
by:
by:
by:
Number:
REV.
Date
ECN No.
DESCRIPTION
APPRO.
Project:
State:
PTA Checked
by:
Date:
C809
0.1uF100V
ADD 0.1uF CAP FROM TRIG IN TO GND
R819 CHANGED TO 10K
C022V1-013
03-12-10
V3.7