Sony HCD-RG295 / HCD-RG495 / HCD-RG595 / MHC-RG295 / MHC-RG495 / MHC-RG595 Service Manual ▷ View online
21
HCD-RG295/RG495/RG595
TUNER SECTION
FM TUNE LEVEL CHECK
Procedure :
1. Turn the power on.
2. Input the following signal from signal generator to FM antenna
2. Input the following signal from signal generator to FM antenna
input directly.
Carrier frequency: A = 87.5 MHz, B = 98 MHz, C = 108 MHz
Deviation : 75 kHz
Modulation: 1 kHz
ANT input : 35 dBu (EMF)
Modulation: 1 kHz
ANT input : 35 dBu (EMF)
Note:
Use 75 ohm coaxial cable to connect signal generator and the set.
You cannot use video cable for checking.
Use signal generator whose output impedance is 75 ohm.
You cannot use video cable for checking.
Use signal generator whose output impedance is 75 ohm.
3. Set to FM tuner function and tune A, B and C signals.
4. Confirm “TUNED” is lit on the display for A, B and C signals.
4. Confirm “TUNED” is lit on the display for A, B and C signals.
When the selected station signal is received in good condition,
“TUNED” is displayed.
“TUNED” is displayed.
CD SECTION
Note:
1.
CD Block is basically constructed to operate without adjustment.
2.
Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3.
Use an oscilloscope with more than 10 M
Ω
impedance.
4.
Clean the object lens by an applicator with neutral detergent when
the signal level is low than specified value with the following checks.
5.
Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
Procedure :
1. Connect oscilloscope to TP (RFACI) and TP (VC) on the CD
board.
2. Press the
I/
1
button to turn the power on, and press
the
Z
button to open the CD disc table.
3. Set disc (YEDS-18) on the tray and press the
u
button to
playback.
4. Confirm that oscilloscope waveform is as shown in the figure
below. (eye pattern)
A good eye pattern means that the diamond shape (
◊
) in the
center of the waveform can be clearly distinguished.
Connecting Location:
+
–
–
CD board
TP (RFACI)
TP (VC)
TP (VC)
oscilloscope
(DC range)
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
TIME/DIV: 500 ns
level:
0.9
0.9
±
0.4 Vp-p
TP
(VC)
TP
(RFACI)
IC201
– CD Board (Conductor Side) –
22
HCD-RG295/RG495/RG595
MEMO
HCD-RG295/RG495/RG595
23
23
HCD-RG295/RG495/RG595
SECTION 7
DIAGRAMS
7-1. BLOCK DIAGRAM – CD SERVO Section –
CD DSP
IC201
CH2RIN
MUTE
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
57
64
A
+3.3V
DETECTOR
A
AC_
SUM
58 B
65
EG_
IN
IN
70
RFACO
71 RFACI
3
PCMD
112
AOUT1
117
AOUT2
4 PCMDI
5
BCK
55
FEO
53
TEO
52
TEI
54
FEI
6 BCKI
R-CH
1
LRCK
2 LRCKI
59 C
60 D
50 E
51 F
66 LD
67 PD
16 CH4OUTF
15 CH4OUTR
27 OPOUT
38 MDP
AUTOMATIC
POWER CONTROL
Q321
LD
PD
LASER DIODE
OPTICAL PICK-UP BLOCK
(KSM-213DCP)
B
C
D
E
F
41 SFDR
42 SRDR
43 TFDR
44 TRDR
45 FFDR
46 FRDR
DATA
C-3
C-4
C-5
C-15
C-6
C-7
C-11
C-12
C-9
C-10
C-14
C-13
C-1
C-8
C-3
C-5
C-15
C-6
C-4
C-7
C-11
C-12
C-9
C-10
C-14
C-13
C-1
C-8
I-V AMP
M401
(SPINDLE)
M402
(SLED)
17 CH3OUTF
18 CH3OUTR
14 CH1OUTF
13 CH1OUTR
12 CH2OUTF
11
7
20
89
SSTP
39
CH2FIN 6
CH1RIN 5
CH1FIN 4
CH3RIN 22
CH3FIN 23
CH4IN 24
OPIN+ 2
CH2OUTR
M
M
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC402
S201
(LIMIT)
+3.3V
108
XTAO
109
XTAI
X201
16.9344MHz
CLOK
11
XLAT
16
SENS
20
SCOR
26
DATA2
12
CLK2
90
XLAT-MP3
13
REQ-MP3
14
IREQ-MP3
10
ACK-MP3
15
XTACN
7
XRST
8
52 O-CD-DATA
54 O-CD-CLK
28 O-XLAT/O-MP3-STB
53 I-CD-SENS
40 I-SCOR
71 I-MP3-DATA
72 O-MP3-DATA
70 O-MP3-CLK
26 O-MP3-XLAT/O-MP3-CS
30 O-MP3-CS/O-MP3-LP
29 I-MP3-REQ
27 I-MP3-ACK
24 O-XTCN
32 O-XRST
31 O-D-MUTE/O-XLT
LOADING MOTOR DRIVE
IC701
FIN
RIN
O-LM-F
S751
LEVEL SHIFT
Q731
DISC TABLE
ADDRESS SENSOR
IC731
34
OUT1 4
OUT2 2
7
9
O-LM-R 33
M
M751
(LOADING)
TABLE MOTOR DRIVE
IC712
FIN
RIN
O-TM-F 36
OUT1 4
OUT2 2
7
9
O-TM-R 35
I-CD-NUMBER-SENS 37
I-CD-ENCODER 66
I-OPEN-SW 38
M
M741
(TABLE)
ROTARY
ENCODER
S711
DISC TABLE
ADDRESS DETECT
OPEN
CLOSE
DISC TABLE
OPEN/CLOSE
DETECT
A
CD-L
SYSTEM CONTROLLER
IC901 (1/4)
: CD PLAY
SIGNAL PATH
R-ch is omitted due to same as L-ch.
(Page 24)
HCD-RG295/RG495/RG595
24
24
HCD-RG295/RG495/RG595
7-2. BLOCK DIAGRAM – MAIN Section –
AUDIO IN
R-CH
J702
HP IN
C
CD-L
A
L451
BIAS OSC
MUTING
Q305
HRPE1
(REC/PB/ERASE)
(DECK-B)
HP1
(PB)
(DECK-A)
L-CH
R-CH
R-CH
L-CH
R-CH
R-CH
R-CH
MUTING
Q307
MUTING CONTROL
SWITCH
Q305, 306
MUTING
Q401
R-CH
MUTING
CONTROL SWITCH
Q400, 407
REC CONTROL
SWITCH
Q409, 410
R-CH
REC AMP
IC401
PB AMP
IC301
ERASE
BIAS OSC
Q453
REC SWITCH
Q403
PB SWITCH
(DECK-B)
Q303
REC BIAS
SWITCH
Q451, 452
+9V
R-CH
PB SWITCH
(DECK-A)
Q301
R-CH
+
DECK-A/B
SELECT SWITCH,
REC/PB
SELECT SWITCH
Q405, 406, 408
TUNER (FM/AM)
AM
FM ANT
AM ANT
TUNER-L
TUNER-R
PLL DO
R-CH
RDS DATA
RDS CLK
PLL DI
PLL CLK
PLL CE
FM75
Ω
COAXIAL
ANTENNA
45 I-LC23003-DI
39 TAPEL
1 TUNERL
2
3
LIN
DATA
6
CLK
16
DATA
15
CLK
2
10
AUXL
11 VINL
TONEOUTL
14
OUTL
9
LOUT
40 CDL
O-BIAS
43 O-LC23003-DO
44 O-LC23003-CLK
42 O-LC23003-CE
49
O-CDG-MUTE-DATA
/I-RDS-DATA
/I-RDS-DATA
41
O-CDG-RST
/I-RDS-CLK
/I-RDS-CLK
4
O-REC/PB
2
O-REC-MUTE
3
O-R2S15207FP-DATA
58
4
SAOUT
I-STREAM
68
O-AUDIO-CLK
57
O-R2S15208SP-DATA
56
I-HP/AUDIO IN
61
12
BB12
13
BB22
F
SW OUT
E
OUT
G
BASS AGC
3
RECOUTL
I-VACS
I-HALF-A
63
D923
D921
BAND-PASS
FILTER
Q111, 112
+
R-CH
R-CH
BASS AGC
Q113
D031
PARAMETRIC EQUALIZER
IC102
(RG595: E, EA)
(RG295/RG495/RG595: AEP, UK)
INPUT SELECTOR, TONE CONTROL,
ELECTRICAL VOLUME
IC101
CAMP+
M
TAPE MECHANISM
DECK BLOCK
A-HALF
B-SOL
B-HALF
A-PHOTO
B-PHOTO
B-REC-F
CAPSTAN/REEL
MOTOR DRIVE
Q701, 704
TRIGGER PLUNGER
DRIVE (DECK-B)
Q702, 705
30
O-SOL-B 35
A-SOL
TRIGGER PLUNGER
DRIVE (DECK-A)
Q703, 706
O-SOL-A 34
O-MOTOR 33
I-HALF-B 27
I-RELL-A 31
I-RELL-B 28
I-REC-SW
O-TCM-SYNC
29
I-TCM-SYNC 73
36
TAPE MECHANISM
DECK CONTROLLER
IC701 (1/2)
SYSTEM CONTROLLER
IC901 (2/4)
: TUER (FM/AM)
: CD PLAY
SIGNAL PATH
R-ch is omitted due to same as L-ch.
: Saudi Arabia model
EA
Abbrivation
: TAPE PLAY (DECK-A)
: TAPE PLAY (DECK-B)
: REC
: AUDIO IN
(RG295: AEP, UK/RG495: AEP/RG595: AEP, UK)
(RG495/RG595)
(Page 23)
(Page 25)
(Page 25)
(Page 25)
(Page 25)
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