1717
XR-C7500R/C7500RX
SECTION 7
DIAGRAMS
7-1. BLOCK DIAGRAM – TUNER/TAPE Section –
1
2FM-ANT
AM-ANT
53
VSM
AMSIN
32
TUNATT
14
S-METER
10
MPX
8
AM-DET
9
RDSDET
05
MUTING
Q22
BUFFER
Q50
MUTING
Q21
D20
FM/AM TUNER UNIT
TUX1
SYSTEM CONTROLLER
IC600 (1/4)
17
EEPROM SDL
J1
(FM/AM ANTENNA)
5
VCC
TUNER VCC
16
VDD
TUNER +5V
11
BU 5V
10 52
MPTH
75
DAVN
RDS DECODER
IC50
INTERFACE
REGISTER
IIC BUS
SLAVE
TRANSCEIVER
OSCILLATOR
& CLOCK
X50
4.332MHz
48
5
OSCI
OSCO
SDA
SCL
DAVN
57 kHz
BAND-PASS
FILTER
CLOCKED
COMPARATOR
RDS/RDBS
DEMODULATOR
& DECODER
SIGNAL
QUALITY
DECODER
16 18 19
MPX
CIN
4
5
SC
OUT
MULTI
PATH
DETECTOR
20 2
LVIN
MPTH
50
QUALITY
56
NS MASK
BAND-PASS
FILTER
IC90
MUTING CONTROL
SWITCH
Q20
NOISE DET
DISCHARGE
SWITCH
Q601
DATA
CLOCK
DATA,CLOCK (Page 18)
MPX (Page 18)
A
AM (Page 18)
B
LEVEL (Page 18)
F
BACKUP +5V
T. ROM-SDA
18
EEPROM SCL
T. ROM-SCL
SDA
SCL
4
FM AGC
51
FM AGC
BUFFER
Q11
DATA
12 13
AM-IF
19
CLOCK
10
E
AM-IF (Page 18)
C
9
RV230
DOLBY LEVEL (L)
TAPE EQUALIZER AMP,
DOLBY NR AMP, AMS
IC250
34
32
R-CH
PBF
IN1
FWD
L-CH
HP901
(PLAYBACK)
FWD
R-CH
REV
L-CH
REV
R-CH
PBR
IN1
R-CH
R-CH R-CH R-CH
R-CH
R-CH
EQ AMP 29 27 MUTE DOLBY
NR AMP
PB
OUT1
TAPE
IN1
AMS
DET
+
19
DRSW
18
TAPESW
20
INSW
DOLBY
MSSW
24
LINE
OUT1
14
MS
OUT
TAPE L (Page 18)
D
• SIGNAL PATH
: MW/LW
: FM
: TAPE PLAY
REGULATOR
CONTROL SWITCH
Q202
CAPSTAN/REEL
MOTOR DRIVE
Q204
TAPEON
CM-ON
VCC
REEL SENSOR B+ BATT B+
BATT B+
Q205
IN1
IN2
OUT1
OUT2
LOADING/TAPE OPERATION
MOTOR DRIVE
IC201
61
M
M
M901
(CAPSTAN/REEL)
9
7
MOTOR
DRIVE
3
4
1
LM-EJ
59
LM-LOD
60
REGULATOR
Q203
62
LOADING/TAPE
OPERATION
TAPE OPERATION
SWITCH
BUFFER
TAKE-UP
REEL
SENSOR
SUPPLY
REEL
SENSOR
REEL SENSOR BOARD
REEL
5865 – 68
POS0 – POS3
TAPE
DETECT
EJECT/FF/REW/
REV/FWD MODE DETECT
11
2
AMSON
3
TAPE ATT
9
DOLBY
120
MTLOUT
57
F/R
7
16
17