Sony CMT-GPX9DAB / HCD-GPX9 Service Manual ▷ View online
21
HCD-GPX9
DECK SECTION
1. Demagnetize the record/playback head with a head
demagnetizer.
2. Do not use a magnetized screwdriver for the adjustments.
3. After the adjustments, apply suitable locking compound to
3. After the adjustments, apply suitable locking compound to
the parts adjust.
4. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
5. The adjustments should be performed for both L-CH and R-
CH.
6. Switches and controls should be set as follows unless otherwise
specified.
REC BAIS ADJUSTMENT
Setting:
Procedure:
1. Connect a digital voltmeter (AC range) to TP101 (L), TP201
(R) and TP (GND) on the MAIN board.
2. Insert a tape.
3. Press the
3. Press the
I
/1
button to turn the power on, and press the
[FUNCTION] button to select TAPE function.
4. Press the [ REC] button twice to start recording.
5. Adjust RV101 (L-ch), RV201 (R-ch) on the MAIN board so
5. Adjust RV101 (L-ch), RV201 (R-ch) on the MAIN board so
that the digital voltmeter reads AC 6.15 V.
6. Connect an oscilloscope or frequency counter to TP101 (L),
TP201 (R) and TP (GND) on the MAIN board.
7. Confirm that the frequency is 82 kHz
±
3 kHz.
Adjustment Location:
SECTION 5
ELECTRICAL ADJUSTMENTS
MAIN board
digital voltmeter
(AC range)
TP101 (L), TP201 (R)
TP (GND)
z
– MAIN BOARD (Conductor Side) –
RV201
RV101
TP (GND)
REC BIAS ADJUSTMENT
(R-CH)
(L-CH)
TP201 (R)
TP101 (L)
22
HCD-GPX9
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
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.
following checks.
5. Check the focus bias check when optical block is replaced.
FOCUS BIAS CHECK
Procedure :
1. Connect the oscilloscope to TP012 (RFACO) and TP013 (VC)
on the BD board.
2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01)
3. Press the [ CD] button.
4. Confirm that the oscilloscope waveform is as shown in the
3. Press the [ CD] button.
4. Confirm that the oscilloscope waveform is as shown in the
figure below. (eye pattern)
A good eye pattern means that the diamond shape (
A good eye pattern means that the diamond shape (
◊
) in the
center of the waveform can be clearly distinguished.
•
RF signal reference waveform (eye pattern)
Checking Location:
+
–
–
BD board
TP012 (RFACO)
TP013 (VC)
TP013 (VC)
oscilloscope
(DC range)
VOLT/DIV: 0.2 V (with the 10: 1 probe in use.)
TIME/DIV: 500 ns
TIME/DIV: 500 ns
0.7
When observing the eye pattern, set the oscilloscope
for AC range and raise vertical sensitivity.
for AC range and raise vertical sensitivity.
0.3 Vp-p
– BD BOARD (Conductor Side) –
TP012
(RFACO)
TP013
(VC)
u
HCD-GPX9
23
23
HCD-GPX9
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM – CD SERVO Section –
9
RIN
4
OUT1
2
OUT2
M701
(LOADING)
S701
(OUT)
S702
(CHUCK)
S703
(TRIGGER)
M
LOADING MOTOR DRIVE
IC701
7
FIN
A/D
CONVERTER
CH2OUTF
CH2OUTR
23
24
21
4
5
5
7
17
18
16
15
RFACI
ASYO
ASYI
FILTER
FILO
PCO
CLTV
FILI
DIGITAL PLL
ASYMMETRY
CORRECTOR
EFM
DEMODULATOR
CD DSP
IC101 (1/2)
MDP
DIGITAL
CLV
PROCESSOR
32K
RAM
ERROR
CORRECTOR
INTERNAL BUS
SQCK
SQSO
EXCK
AOUT1
C4M
XTSL
XTAO
XTAI
AOUT2
R-CH
D/A
DIGITAL
INTERFACE
D/A
CONVERTER
SELECTOR
CLOCK
GENERATOR
SUBCODE
PROCESSOR
SCOR
WFCK
XUGF
GFS
EMPH
SENS
DATA
CLOCK
XLAT
SBSO
CD SENS
CD DATA
CD XLT
TEI
FEI
FOCUS/
TRACKING/SLED
SERVO DSP
FOCUS/TRACKING/SLED
PWM GENERATOR
SFDR
CH3FIN
CH4IN
CH3RIN
CH3OUTF
CH3OUTR
CH1FIN
CH1RIN
CH2FIN
CH2RIN
20
MUTE
SRDR
TFDR
TRDR
FFDR
FRDR
SSTP
COUT
MIRR,
DFCT, FOK
DETECTOR
SERVO AUTO
SEQUENCER
SERVO
INTERFACE
CPU INTERFACE
SCLK
TO CPU INTERFACE
FOK
MIRR
DFCT
2
OPIN+
CH4OUTF
CH4OUTF
27
OPOUT
M101
(SPINDLE)
MOTOR
DRIVE
MOTOR
DRIVE
COIL
DRIVE
CH1OUTF
CH1OUTR
COIL
DRIVE
M
M
M102
(SLED)
MOTOR/COIL DRIVE
IC251
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
CD DSP
IC101 (2/2)
• SIGNAL PATH
: CD PLAY
14
13
11
12
CD SCOR
A
CD
13
11
12
9
10
14
112
101
20 22
3
1
2
7
TO SERVO AUTO
SEQUENCER
39
48 50
XPCK
105
47 49
42
43
6
XRST
93
CD XRST
22
89 90
76
73
110
86
72
81
91 92
108
100
95 98 97
103 104 106 64
38
CD CLK
34 23
LRCK
BCK
PCMD
59 62 61
LRCKI
BCKI
PCMDI
58 56 57
24 19
25
26
27
28
23
21
19
18
35
34
E
B
A
CD +3V
F
DETECTOR
A
B
C
D
RF
SUMMING
AMP
FOCUS
ERROR
AMP
TRACKING
ERROR AMP
RFACO
FEO
TEO
E
F
AUTOMATIC
POWER
CONTROL
Q10
APC LD
AMP
LD
LD
PD
LASER DIODE
OPTICAL PICK-UP
BLOCK
(KSM-213DCP)
PD
I-V AMP
D
C
EQ_
IN
38
33
32
EQ
AC_
SUM
RFAC
VCA
X171
16.9344MHz
SYSTEM CONTROLLER
IC306 (1/3)
S101
(LIMIT)
XTCN 55
CD AMUTE 39
R-CH
MUTING
Q102
CD MUTING
CONTROL
Q317, 318
• R-ch is omitted due to same as L-ch.
XTACN
88
65
(CHUCK SW) CDM80 SW2
61
(TRIGGER SW) CDM80 SW3
63
(OUT SW) CDM80 SW1
59
CDM80 LOAD-OUT
60
CDM80 LOAD-IN
(Page 24)
HCD-GPX9
24
24
HCD-GPX9
6-2. BLOCK DIAGRAM – AUDIO Section –
1
INPUT SELECT,
TONE CONTROL,
ELECTRICAL VOLUME
IC302
POWER AMP
IC601
MD IN L
61
J301
CD IN L
36
VOL
IN L
IN L
R-CH
R-CH
R-CH
CD
L-CH
HRP350
(REC/PB/ERASE)
R-CH
ERASE
R/P
BIAS
63
TU IN L
11
TAPE IN L
7
PB
OUT L
OUT L
3
TAPE L
15
REC OUT L
A
37
TONE
OUT
33
VOL
OUT L
EQ
7 9
REC/PB SWITCH
IC301
8
M+10V
BIAS OSC
T301
4
CONT
LEVEL SHIFT
Q301, 302
BIAS OSC
Q303, 304
BIAS TRAP
T101
REC BIAS
(L)
RIPPLE
FILTER
Q305
REC BIAS
SWITCH
Q306, 307
RV101
M
M
CAPSTAN/REEL
MOTOR DRIVE
Q310, 311
TRGM+
PACK
F REC
R REC
END SW
PLAY SW
TC CONT
TC TRG
HALF
END SW
PLAY SW
PLUNGER
DRIVE
Q308, 309
LOW-PASS
FILTER
IC702, 703
TUNER SELECT
SWITCH
IC201
CAPSTAN/
REEL
TAPE MECHANISM
DECK BLOCK
TUNED
STEREO
MUTE
RDS DATA
RDS INT
DI
DO
CLK
CE
TUNED
STEREO
ST MUTE
RDS DATA
RDS INT
ST DIN
ST DOUT
ST CLK
ST CE
ROUT
R-CH
S1_DIN
S1_DOUT
LOUT
AM
FM 75
Ω
ANTENNA
FM/AM
TUNER PACK
AUDIO_RIGHT_OUT
R-CH
AUDIO_LEFT_OUT
ANTENNA
DAB
DAB TUNER MODULE
76
TC TRG
77
TC CAPM CONT
95
TC HALF/REC SW
75
TC PLAY
94
TC END SW
78
BIAS ON
79
TC R/P
71 ST DATA OUT
72 ST DATA IN
73 ST CLK
70 ST CE
69 ST TUNED
68 ST STEREO
67 ST MUTE
58 RDS DATA
72 ST DATA IN
73 ST CLK
70 ST CE
69 ST TUNED
68 ST STEREO
67 ST MUTE
58 RDS DATA
ST DIN
ST DOUT
ST CLK
ST CE
TUNED
STEREO
ST MUTE
RSD DATA
RDS INT
TC TRG
TC CONT
HALF
PLAY SW
END SW
BIAS
R/P
87
EQ DATA
88
EQ CLK
LINE MUTE
86
AMP POWER
83
AC DET
C
84
PROTECT
85
SP RELAY
18 RDS CLK
49 DAB SELECT
19
SI
18
SC
R-CH
R-CH
VP
CT
OUT
OCP
R-CH
R-CH
MUTING
Q501
D609
D611
D608
THP801
OVER LOAD
DETECT
Q502
POWER ON
MUTING
Q601
PROTECT
SWICTH
Q608
STANDBY
SWITCH
Q604
MUTING
CONTROL
Q602, 603
TEMPERATURE
DETECT
Q607
PROTECT
CONTROL
IC602
2
4
3
1
RELAY
OFF SWITCH
Q609
RELAY
DRIVE
Q610, 611
SPEAKER
IMPEDANCE
USE 6 – 16
Ω
TM301
RY301
+
+
RELAY
B+ SWITCH
Q605, 606
+POWER
PHONES
L
R
J321
HP SW
B
L
R
AUDIO IN
• SIGNAL PATH
: CD PLAY
: FM
: AUX IN
: TAPE PLAY
: TAPE REC
• R-ch is omitted due to same as L-ch.
SYSTEM CONTROLLER
IC306 (2/3)
+
+
–
–
15
X IN
31
DAB DATA OUT
32
DAB DATA IN
13
X302
16MHz
X OUT
11
XC OUT
10
X301
32.768kHz
XC IN
: DAB
TUNER SELECT
Q201
(Page 25)
(Page 25)
(Page 23)
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