NAD C 426, Руководство по обслуживанию

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VCC
8
7
4
6
5
3
2
1
GND
WP
SCL
LOAD
LOAD INC
DATA WORD
ADDR/COUNTER
Y DEC
X DEC
R/W
COMP
SERIAL
CONTROL
LOGIC
EN
H.V. PUMP/TIMING
DATA RECOVERY
EEPROM
SERIAL MUX
D
OUT
/ACK
LOGIC
DEVICE
ADDRESS
COMPARATOR
START
STOP
LOGIC
SDA
A2
A1
A0
D
IN
D
OUT
Main Board
U203: AT24C08A-10PU Main Board
U204: MAX232D
Main Board
U402: NJM78M56FA
1
INPUT
3
OUTPUT
2
GND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
C1+
V+
C1–
C2+
C2–
V–
DOUT2
RIN2
V
CC
GND
DOUT1
RIN1
ROUT1
DIN1
DIN2
ROUT2
Main Board
U206: NCP1117ST33T3G
1 3 2
ADJ/GND
V
OUT
V
IN
Main Board
U701: 74HC86
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1A
1B
1Y
2A
2B
2Y
GND
V
CC
4B
4A
4Y
3B
3A
3Y
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
ALC
AM
OSC
AM
MIX
AM
RF.AMP
REG
AGC
AM IF
AM
S-METER
TUNING
DRIVE
STEREO
DRIVE
V
CC
V
CC
AM/FM
IF-BUFF
FM
S-METER
S-CURVE
AM IF
FM
DET
GND
FM IF INPUT
AM MIXER
OUTPUT
FM IF INPUT
BYP
ASS
AM IF INPUT
GND
TU-LED
ST
LED
AM-IF OUTPUT
FM DETECT
OR
A
M NARROW CF
FM S-METER
OUTPUT
AM S-METER
OUTPUT
MUTE
FM/AM
SWITCH
PILOT
V
CO
SD
COMP
DET
BUFF
DECODER
ANTI-BIRIDE
3 rd 5 th
STEREO
SW
MUTE
VCO
304kHz
FF
38k
P-DET
Ø
FM SD ADJ OSC REG AM RF INPUT AFC AM AGC AM DETECT
OR
INPUT FM DETECT
OR
OUTPUT MPX IUTPUT MPX OUTPUT MPX OUTPUT AM STEREO L INPUT AM STEREO R INPUT L-OUT R-OUT
FF
19k
FF
19k
PILOT
DET
Main Board
U901: LA1837L-E