Sony XR-M500R / XR-M550 Service Manual ▷ View online
25
Dolby Level Adjustment
Setting:
[SOURCE]
button
: ON
Preset
[MENU]
(PLAY MODE) and
[DISC ]
buttons
: NR off
[SOUND] (BAS) button
: Center
[SOUND] (TRE) button
: Center
[SOUND] (BAL) button
: Center
[SOUND] (FAD) button
: Center
[+]
(VOL) button
: Maximum
Procedure:
1. Put the set into the FWD PB mode.
2. Adjust RV400 (L-CH) and RV401 (R-CH) so that the level
1. Put the set into the FWD PB mode.
2. Adjust RV400 (L-CH) and RV401 (R-CH) so that the level
meter reading is –6±0.5 dB (0.37 to 0.41 V).
Tuner section adjustments are done automatically in this set.
set
+
–
–
test tape
P-4-D400
(400Hz, 0 dB)
P-4-D400
(400Hz, 0 dB)
level meter
MAIN board
TP (DOLBY-L)/
TP (DOLBY-R)
TP (DOLBY-R)
TUNER SECTION
–
– SET UPPER VIEW –
– SET BOTTOM VIEW –
TUX100
Tape Speed
Adjustment
Adjustment
RV401
Dolby Level
Adjutment (R-ch)
Dolby Level
Adjutment (R-ch)
RV400
Dolby Level
Adjutment (L-ch)
Dolby Level
Adjutment (L-ch)
TP (DOLBY-R)
Dolby Level
Adjustment
Adjustment
TP (DOLBY-L)
Adjustment Location:
27
27
XR-M500R/M550
1
2
FM-ANT
AM-ANT
53
VSM
AMSIN
32
TUNATT
14
S-METER
10
MPX
8
AM-DET
9
RDSDET
05
MUTING
Q101
MUTING
Q102
D102
FM/AM TUNER UNIT
TUX100
SYSTEM CONTROLLER
IC601 (1/4)
17
E2P-SIO
(FM/AM ANTENNA)
5
VCC
TUNER VCC
16
VDD
TUNER +5V
11
BU 5V
10
52
MPTH
75
DAVN
RDS DECODER
IC700
INTERFACE
REGISTER
IIC BUS
SLAVE
TRANSCEIVER
OSCILLATOR
& CLOCK
X700
4.332MHz
4
8
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
IC750
MUTING CONTROL
SWITCH
Q105
NOISE DET
DISCHARGE
SWITCH
Q751
DATA
CLOCK
DATA,CLOCK
(Page 28)
MPX
(Page 28)
A
AM
(Page 28)
B
LEVEL
(Page 28)
G
BACKUP +5V
E2P-SIO
18
E2P-CKO
E2P-CKO
SDA
SCL
4
FM AGC
51
FM AGC
BUFFER
Q750
DATA
12 13
AM-IF
19
CLOCK
10
E
AM-IF
(Page 28)
C
9
RV400
DOLBY LEVEL (L)
TAPE EQUALIZER AMP,
DOLBY NR AMP, AMS
IC401
34
32
R-CH
PBF
IN1
IN1
FWD
L-CH
HP901
(PLAYBACK)
FWD
R-CH
REV
L-CH
REV
R-CH
PBR
IN1
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
IN1
AMS
DET
+
19
DRSW
18
TAPESW
20
INSW
DOLBY
MSSW
24
LINE
OUT1
14
MS
OUT
D101
TAPE L
(Page 28)
D
• SIGNAL PATH
: AM (MW/LW)
: FM
: TAPE PLAY
REGULATOR
CONTROL SWITCH
Q401
CAPSTAN/REEL
MOTOR DRIVE
Q402
TAPEON
CM-ON
VCC
REEL SENSOR B+
BATT B+
BATT B+
Q403
IN1
IN2
OUT1
OUT2
LOADING/TAPE OPERATION
MOTOR DRIVE
IC400
62
M
M
M901
(CAPSTAN/REEL)
9
7
MOTOR
DRIVE
3
4
1
LM-EJ
60
LM-LOD
61
REGULATOR
Q400
59
LOADING/TAPE
OPERATION
TAPE OPERATION
SWITCH
BUFFER
TAKE-UP
REEL
SENSOR
SUPPLY
REEL
SENSOR
REEL SENSOR BOARD
REEL
57
64 – 67
POS0 – POS3
TAPE
DETECT
EJECT/FF/REW/
REV/FWD MODE DETECT
11
2
AMSON
3
DOLBY
120
MTLOUT
23
N-ROUT
7
16
MUTE
SWITCH
Q404
17
(XR-M500R)
SECTION 7
DIAGRAMS
7-1.
BLOCK DIAGRAM – TUNER/TAPE Section –
28
28
XR-M500R/M550
A
(Page 27)
B
(Page 27)
MPX
C
(Page 27)
AM-IF
AM
D
(Page 27)
TAPE L
R-CH
CN300 (1/2)
BUS
AUDIO IN
L
R
SEL
AM
SDA
SCL
SM
1
11
FD1L–
4
AMIF
12
MPX
13
LOUDNESS
VOLUME
IIC BUS
DIGITAL
CONTROL
INPUT SELECT, FM MPX,
ELECTRICAL VOLUME
IC100
SOFT
MUTE
TONE
CONTROL
LOUDNESS
25
18
MPIN
20 21
OUTSWR
24
OUTSSL
23
OUTSSR
R-CH
INPUT
MULTIPLEXER
OUTPUT
SELECTOR
SUBWOOFER
+PHASE CONTROL
26
OUTSWL
MONO
FADER
29
OUT LR
MONO
FADER
30
OUT LF
MIXER
PILOT
CANCELATION
AM/FM NOISE
BLANKER
D/A
CONVERTER
DEMODULATOR
STEREO ADJUST
STEREO BLEND
HIGH-
CUT
L.P.F
MUTE
PILOT DET
L.P.F.
QUAL
S & H
PLL
LEVEL
15
14
QUALITY
17
E
(Page 27)
DATA, CLOCK
DATA
CLOCK
SYSTEM CONTROLLER
IC601 (2/4)
31
71
IIC-SCL
70
IIC-SDA
TEL-MUTE
ST-BY 55
MUTE
5
VOL ATT
16
84
G
(Page 27)
LEVEL
CN300 (2/2)
CN200
AUDIO OUT
FRONT
L
R
R-CH
MUTING
Q250
MUTING
Q251
4
STBY
22
MUTE
11
12
IN1
15 IN3
IN2
14 IN4
POWER AMP
IC300
5
3
21
23
OUT2+
OUT2–
OUT4+
OUT4–
7
OUT1+
OUT1–
17
19
OUT3+
OUT3–
CN301 (1/2)
(POWER CONNECTOR)
1
9
FL+
FL–
FR+
FR–
RL+
RL–
RR+
RR–
4
2
12
10
3
11
TEL-ATT
13
TEST
15
9
AMP MUTING
SWITCH
Q222
LEVEL SHIFT
Q603
MUTING
CONTROL SWITCH
Q220, 221
AUDIO OUT
REAR
L
R
R-CH
MUTING
Q200
MUTING
Q201
R-CH
05
D200
D204
D203
SUB OUT
(MONO)
(L)
(R)
MUTING
Q204
MUTING
Q254
(Page 30)
AMP ON
D201
I
MUTE
(Page 29)
SPEANA
H
(Page 29)
BATT
B+
B+
J
LINE DRIVER
IC200
TESTIN
D206
BATTERY OFF
MUTE DRIVER
Q223
D205
BATT
B+
(XR-M550)
(XR-M550)
(XR-M500R)
(XR-M500R)
• SIGNAL PATH
: AM (MW/LW)
: FM
: TAPE PLAY
: BUS AUDIO IN
LINE DRIVER
IC200
7-2.
BLOCK DIAGRAM – MAIN Section –
29
29
XR-M500R/M550
7-3.
BLOCK DIAGRAM –DISPLAY/BUS CONTROL Section –
SPECTRUM
ANALYZER BUFFER
IC101
05
BACK UP +5V
TH601
SONY BUS INTERFACE
IC501
(FOR SONY BUS)
BUS CONTROL IN
CN500
BUS ON/OFF
SWITCH
Q505
D508
RESET
BATT
7
DATA
DATA
IN
IN
CLK
IN
IN
BUS
ON
ON
BU IN
DATA
OUT
OUT
UNISO
UNISI
UNICKO
LSW901 – 919,
LSW921 – 925,
LSW921 – 925,
S901, 902
FRONT PANEL
OPEN/CLOSE MOTOR DRIVE
IC502
OPEN
CLOSE
OUT1
OUT2
S901
(RESET)
D628
BACK UP +5V
BATT B+
RES
BOOT
RESET
HSTX
X602
18.432MHz
LCD-INH
LCD-CE1
LCD-CE0
LCD-SCK
SPE-IN
EXTAL
XTAL
VCC
M BA
TT
VREF
FP CTRL
MOT+
MOT–
BOOT
6
CLK
4
BUS
ON
1
BATT
3
9
RESET
13
8
11
12
10
18
17
19
BU-IN 77
SIRCS 24
80
14
111
12
11
6
3
14
RNF
16
4
5
40 98 97
I-DET
96
SYSRST
6
90
RAMBU
85
86
86
81
85
49
82
98
101
38
69
70
66
64
TX/LCD-DATA
RX
60
62
50
UNISO
UNISI
UNISCK
BU-IN
NMI
97
105
SPE-A
40
SPE-B
41
SPE-C
42
SPE-SEL
43
ILL-ON
52
LCD-INH
97
LCD-CLK
99
LCD-CE0
98
LCD-DATA
100
RAM RESET
IC603
LEVEL SHIFT
Q503
SCHMITT TRIGGER
IC606
MOTOR
DRIVE
+9V
REGULATOR
IC503
46
KEY IN0
47
KEY IN1
72
RC IN1
48
RC IN0
79
KEY ACK
REFERENCE
VOLTAGE SWITCH
Q501, 502
MOTOR OVER LOAD
DETECT
IC500, Q500
RESET SIGNAL
GENERATOR
IC602
BACK UP +5V
DATA
CLK
BUS-ON
BU IN
LINK-OFF
BUS-ON
BUS ON
SWITCH
RST
2
RESET
SWITCH
BATTERY
CHECK
BATTERY CHECK
Q504
SIRCS BUFFER
Q506
REMOTE CONTROL
RECEIVER
IC900 (SUB Board)
REMOTE CONTROL
RECEIVER
IC903 (DISPLAY Board)
KEY ACTIVE
SWITCH
Q600, 601
DATA
CLK
BUS-ON
BU IN
LIQUID CRYSTAL DISPLAY
DRIVE CONTROLLER
IC607
D513
BATT B+
D509
D627
J500
REMOTE IN
D501
M
M601
FRONT PANEL
OPEN/CLOSE
S901
CASSETTE
IN/OUT DETECT
P
ACK SW
BUS-ON
2
DATA
5
SIRCS
3
BUS ON
6
CLK
4
D505
D502
BATT B+
BATT B+
AD ON
D611
LIQUID CRYSTAL DISPLAY DRIVER
IC901
SPECTRUM ANALYZER BAND-PASS FILTER
IC102
S902
RESET
BZ600
(BUZZER)
X601
3.68MHz
X600
32.768kHz
BEEP
X0
X1
X0A
X1A
15
92
93
74
73
BUZZER DRIVE
Q604
SYSTEM CONTROLLER
IC601 (3/4)
(XR-M500R)
LSW902, 904 – 918,
LSW921 – 925,
S901, 902
(XR-M550)
AIN
D103
8
B.P.F.
PEAK
HOLD
MULTI
PLEXER
DECODER
17
AOUT
10
A
11
B
12
C
14
SEL
REGISTER
f: 6.8Hz
to
14.4kHz
MUTING
Q611
H
(Page 28)
SPEANA
K
(Page 30)
ILL ON
J
(Page 28)
MUTE
57
106
LED SW1
LED SW1
46
115
LED SW2
LED SW2
47
116
SP-LA
T
SPELA
T
33
4
RX
12
TX
13
VLCD 85
DIMMER
LED DRIVE
Q905, 906
LED903 – 908,
LED911 – 916
(LCD BACK LIGHT)
1 – 71
SEG1 – SEG71
83 – 76
COM1 – COM8
OSC
96
OSC
LCD-INH
97
LCD-CLK
99
LCD-CE1
98
LCD-DATA
100
LCD-SW2 84
VLCD 85
LCD-SW1 85
1 – 69
SEG1 – SEG69
83 – 76
COM1 – COM8
OSC
96
OSC
LIQUID CRYSTAL DISPLAY DRIVER
IC902
C911, R982
C906, R972
LIQUID CRYSTAL
DISPLAY
(OPERATION SIDE)
LCD902
LIQUID CRYSTAL
DISPLAY
(SECURITY SIDE)
LCD901
REGULATOR
D909
REGULATOR
CONTROL SWITCH
Q910
LCD +9V
(Page 30)
LSW-SW1, LSW-SW2
L
86
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