Sony XR-C7220R Service Manual ▷ View online
– 21 –
MW Auto Scan/Stop Level Adjustment
Setting:
[SOURCE]
n
[MODE]
buttons
: MW
Procedure:
1. Set to the test mode. (See page 18)
2. Push the
1. Set to the test mode. (See page 18)
2. Push the
[SOURCE]
button and set to FM.
3. Push the
[MODE]
button and set to MW.
Display
4. Push the preset
[3]
button.
Display
5. Adjust with the volume RV1 on TUX10 so that the “MW”
indication turns to “MW0” indication on the display window.
But, in case of already indicated “MW0”, turn the RV1 so that
put out light “0” indication and adjustment.
But, in case of already indicated “MW0”, turn the RV1 so that
put out light “0” indication and adjustment.
Display
Adjustment Location: See page 22.
AM RF signal
generator
Carrier frequency : 999 kHz
30% amplitude
modulation by
1 kHz signal
Output level
30% amplitude
modulation by
1 kHz signal
Output level
: 33 dB (44.7
µ
V)
(50
Ω
)
set
AM dummy antenna
30
Ω
15 pF
65 pF
antenna jack
TP
SHUF
TP
SHUF
TP
SHUF
– 22 –
Adjustment Location:
– SET UPPER VIEW –
– SET BOTTOM VIEW –
TUX10
Tape Speed Adjustment
RV1 MW Auto Scan/Stop Level Adjustment
RV3 FM Stereo Separation Adjustment (Wide)
RV4 FM Stereo Separation Adjustment (Narrow)
RV2 FM Auto Scan/Stop Level Adjustment
RV240
(R-CH)
RV230
(L-CH)
(L-CH)
Dolby Level
Adjustment
RV10 FM RDS S-Meter Adjustment
TP (DOLBY-L)
TP (DOLBY-R)
TP (DOLBY-R)
Dolby Level
Adjustment
Adjustment
XR-C7220R
– 23 –
– 24 –
SECTION 6
DIAGRAMS
6-1.
BLOCK DIAGRAM – TUNER/TAPE Section –
05
TAPE EQUALIZER AMP,
DOLBY NR AMP, AMS
IC250
34
32
R-CH
FWD
IN (L)
IN (L)
FWD
L-CH
HP901
(PLAYBACK)
FWD
R-CH
REV
L-CH
REV
R-CH
REV
IN (L)
IN (L)
R-CH
R-CH
R-CH
R-CH
R-CH
D200
(METAL DETECT)
R-CH
EQ AMP
29
27
MUTE
DOLBY
NR AMP
EQ
OUT
TAPE
IN (L)
IN (L)
AMS
DET
+
113
102
116
114
N-ROUT
MTLIN
19
FWD/REV
18
MTL/NORMAL
17
16
20
MUTE/TAPE
Q250
MUTE SWITCH
DOLBY
NR.ON
AMSON
103
AMSIN
AMS/PLAY
24
LCH
OUT
14
AMS
OUT
RV230
DOLBY LEVEL (L)
• SIGNAL PATH
: AM (MW/LW)
: FM
: TAPE PLAY
SYSTEM CONTROLLER
IC600 (1/4)
REGULATOR
CONTROL SWITCH
Q202
CAPSTAN/REEL
MOTOR DRIVE
Q204
LM-EJ
TAPEON
LM-LOD
CM-ON
VCC
REEL SENSOR B+
BATT B+
BATT B+
Q201
IN1
IN2
OUT1
OUT2
LOADING/TAPE OPERATION
MOTOR DRIVE
IC201
111
M
M
M901
(CAPSTAN/REEL)
9
7
MOTOR
DRIVE
2
4
3
110 109
REGULATOR
Q203
112
LOADING/TAPE
OPERATION
TAPE OPERATION
SWITCH
BUFFER
TAKE-UP
REEL
SENSOR
SUPPLY
REEL
SENSOR
REEL SENSOR BOARD
REEL
104
105 – 108
POS0 – POS3
TAPE
DETECT
EJECT/FF/REW/
REV/FWD MODE DETECT
(FM/AM ANTENNA)
FM-ANT
AM-ANT
FM +B
FM B+
AM +B
AM B+
+B (FM/AM)
D10
FM/AM TUNER UNIT
TUX10
LO/DX
VCO (FM/AM)
FM-IF-COUNT
AM-IF-COUNT (SEEK)
VT (FM/AM)
SD
RECEIVE/SEEK
FM L-OUT
FM R-OUT
R-CH
R-CH
D50
MUTING
CONTROL SWITCH
Q51
A
B
FM/AM SIGNAL
METER BUFFER
Q13
WIDE
TUNMUTE
VSM
SD-IN
ST-MONO
FM/AM PLL
IC10
LO/DX
WIDE
VSM
AF SEEK
SEEK
SD
ST/MONO
IF IN
FM OSC
AM OSC
PD
XOUT
XIN
X10
7.2MHz
D.IN
D.OUT
CLK
CE
D-IN
D-OUT
CLK
CE
D-IN
D-OUT
CLK
CE
PLLSO
PLLSI
PLLCKO
PLLCE
SEEK OUT
WIDE/NARROW
SWITCHING
Q14
(Page 25)
(Page 25)
FM-L
AM
C
(Page 25)
TAPE-L
MUTING
Q50
MUTING
Q60
BAND-PASS
FILTER
IC50
LOW-PASS
FILTER
Q17
WIDE/NARROW
SWITCHING
Q15
5 6 4 2
20
1
9
13
16
15
18
7
4
1
2
21
11
6
5
24
19
13
20
8
10
9
22
12
23
16
18
5
3 2
4
20
1
53
26
27
25
28
SEEKOUT
WIDE
VSM
AF SEEK
SD
ST/MONO
SEEK
AF-SEEK
TIME CONSTANT
SWITCH
IC11
AM B+
FM RDS
S-METER
RV10
FORCED WIDE/
NARROW
ST/MONO
S-METER
15
S-METER (RDS)
AM-DET
FM-DET
BUFFER
Q12
52
MTP
70
I2C SIO
71
I2C CKO
75
DAVN
RDS DECODER
IC150
INTERFACE
REGISTER
IIC BUS
SLAVE
TRANSCEIVER
OSCILLATOR
& CLOCK
X150
4.332MHz
4
8
5
OSCI
OSCO
10
9
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
AF SEEK SWITCH
Q16
XR-C7220R
– 25 –
– 26 –
6-2.
BLOCK DIAGRAM – MAIN Section –
05
INAO1
VOUT
TCO1
VR
IN1
IN1
TIN1
FD
IN1
IN1
FNTO1
REO1
(Page 24)
(Page 24)
AM
FM-L
INPUT SELECT,
ELECTRICAL VOLUME
IC301
LINE DRIVER
IC311
INPUT
SELECTOR
VOLUME
CONTROL
CIRCUIT
TONE
CONTROL
CIRCUIT
FADER
CONTROL
CIRCUIT
REFERENCE VOLTAGE
GENERATOR (FOR BIAS)
IC302
LOUDNESS
CONTROL
CIRCUIT
SHIFT
REGISTER &
LATCH
VCT
BUFFER
CN780 (1/2)
BUS
AUDIO IN
L
R
R-CH
CN780 (2/2)
FRONT
LINE OUT
REAR
LINE OUT
L
R
L
R
R-CH
R-CH
COM +8V
R-CH
R-CH
CE
DATA
CLK
VOLCE
DATA
CLK
VCT
GAIN
B
(Page 24)
TAPE-L
C
(Page 30)
LED ON
D
22
16 21
17
40
42
33
32
31
30
26
25
23
24
41
39
A
36 – 38
AM-IN-L
AUX-IN-L
FM-IN-L
TAPE-IN-L
R-CH
R-CH
VOLCE
DATA
CLK
MUTING
Q340
MUTING
Q430
MUTING
Q330
MUTING
Q440
22 MUTE
4
11
12
IN1
15 IN3
IN2
14 IN4
POWER AMP
IC700
5
3
21
23
OUT2+
OUT2–
OUT4+
OUT4–
7
OUT1+
OUT1–
17
19
OUT3+
OUT3–
CN700 (1/2)
(POWER CONNECTOR)
1
9
FRONT L (+)
FRONT L (–)
FRONT R (+)
FRONT R (–)
REAR L (+)
REAR L (–)
REAR R (+)
REAR R (–)
4
2
12
10
3
11
TEL-ATT
13
TEST MODE
15
9
POWER AMP
MUTE SWITCH
Q702
LEVEL SHIFT
Q603
MUTING
CONTROL SWITCH
Q700, 701
D717
66
VOLSO/SUBSO
VOLCKO/SUBCKO 67
VOLCE
MUTE
64
65
58
TEL-ATT 79
SYSTEM CONTROLLER
IC600 (2/4)
D715
TESTIN
ST-BY
• SIGNAL PATH
: AM (MW/LW)
: FM
: TAPE PLAY
: BUS AUDIO IN
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