Sony CMT-CPX1 / HCD-CPX1 Service Manual ▷ View online
17
HCD-CPX1
Note:
Confirm each contents of this section first of all. If the results are
not satisfied, do the adjustment.
not satisfied, do the adjustment.
1.
The adjustments should be performed with the rated power supply
voltage unless otherwise noted.
voltage unless otherwise noted.
2.
The adjustments should be performed in the order given in this service
manual.
manual.
3.
The adjustments should be performed for both L-CH and R-CH.
REC BIAS ADJUSTMENT
Procedure:
1. Press the
1. Press the
[FUNCTION]
key to select “MD” or “VIDEO”.
2. Set the tape into the deck.
3. After pressing
3. After pressing
z
REC
key, press
X
(TAPE) key to start
recording.
4. Mode: Record
5. Mode: Playback
6. Confirm the playback signal recorded in step 3 becomes
adjustable level as follows.
If these levels are out of specified values, adjust the RV653 (L-
CH) and RV603 (R-CH) on the TC board to repeat steps 4 and
5.
If these levels are out of specified values, adjust the RV653 (L-
CH) and RV603 (R-CH) on the TC board to repeat steps 4 and
5.
Specified values: Playback output of 315 Hz to playback
output of 10 kHz:
± 2.0 dB
Adjustment Location: TC board
attenuator
set
MAIN board
MD (VIDEO) IN jack (J101)
L-CH, R-CH
MD (VIDEO) IN jack (J101)
L-CH, R-CH
1) 315 Hz
2) 10 kHz
2) 10 kHz
34.6 mV (– 27 dB)
600
Ω
blank tape
CN-123
CN-123
AF OSC
+
–
–
set
recorded
portion
portion
SP OUT board
SPEAKER terminals (J701)
L-CH, R-CH
SPEAKER terminals (J701)
L-CH, R-CH
level meter
0 dB=0.775 V
DECK SECTION
REC LEVEL ADJUSTMENT
Procedure:
1. Press the
1. Press the
[FUNCTION]
key to select “MD” or “VIDEO”.
2. Set the tape into the deck.
3. After pressing
3. After pressing
z
REC
key, press
X
(TAPE) key to start
recording.
4. Mode: Record
5. Mode: Playback
6. Confirm the play back signal recorded in step 3 becomes
adjustable level as follows.
If these levels are out of specified values, adjust the RV652 (L-
CH) and RV602 (R-CH) on the TC board to repeat steps 4 and
5.
If these levels are out of specified values, adjust the RV652 (L-
CH) and RV602 (R-CH) on the TC board to repeat steps 4 and
5.
Specified values: Playback level 30.8 to 38.8 mV (–28 to –26 dB)
Adjustment Location: TC board
Adjustment Location: TC board
set
MAIN board
MD (VIDEO) IN (J101)
315 Hz, 34.6 mV (–27 dB)
MD (VIDEO) IN (J101)
315 Hz, 34.6 mV (–27 dB)
blank tape
CS-123
CS-123
600
Ω
attenuator
AF OSC
+
–
–
set
recorded
portion
portion
SP OUT board
SPEAKER terminals (J701)
L-CH, R-CH
SPEAKER terminals (J701)
L-CH, R-CH
level meter
SECTION 5
ELECTRICAL ADJUSTMENTS
(R-CH)
(L-CH)
RV603
(R-CH)
RV602
(L-CH)
RV652
RV653
– TC BOARD (Component Side) –
REC Level Adjustment
REC Bias
Adjustment
Adjustment
18
HCD-CPX1
CD SECTION
Note:
1.
CD Block is basically constructed to operate without
adjustment.
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.
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.
replaced.
FOCUS BIAS CHECK
Procedure :
1.
1.
Connect oscilloscope to TP (RFAC) and TP (VC) on the BD
board.
board.
2.
Press the
?/1
button to turn the power ON, and press the
Z
(CD) button to open the CD disc tray.
3.
Set disc (YEDS-18) on the tray and press the
CD
NX
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 (
below. (eye pattern)
A good eye pattern means that the diamond shape (
) in the
center of the waveform can be clearly distinguished.
s
Checking Location:
+
–
–
BD board
TP (RFAC)
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
(RFAC)
TP
(VC)
– BD BOARD (Conductor Side) –
IC103
IC102
IC101
HCD-CPX1
19
19
SECTION 6
DIAGRAMS
6-1.
BLOCK DIAGRAM – CD SERVO Section –
SQSO
SQCK
A/D
CONVERTER
6
7
8
9
16
18
11
10
12
2
1
51
49
48
43
24
41
40
39
64 15
28
29
30
31
32
33
23
24
22
6
7
4
5
17
18
16
15
A+3.3V
DETECTOR
A
B
C
D
RFAC
SUMMING
AMP
FOCUS
ERROR AMP
TRACKING
ERROR AMP
RFAC
FE
RF AMP,
FOCUS/TRACKING ERROR AMP
IC103
TE
E
F
F I-V AMP
E I-V AMP
AUTOMATIC
POWER
CONTROL
Q101
APC LD
AMP
LD
LD
PD
LASER DIODE
RFAC
ASYO
ASYI
ASYMMETRY
CORRECTION
CORRECTION
DIGITAL
PLL
DIGITAL SIGNAL PROCESSOR,
DIGITAL FILTER, D/A CONVERTER
IC101 (1/2)
DATA
XLAT
CLOK
14
5
6
MDP
26
7
8
XLON
3
XRST
DIGITAL
CLV
D/A
INTERFACE
SE
TE
FE
RFDC
FOCUS/TRACKING/SLED
SERVO DSP
FOCUS/TRACKING/SLED
PWM GENERATOR
SFDR
20
MUTE
SRDR
TFDR
TRDR
FFDR
FRDR
EMPH
WFCK
GFS
MIRR/DFCT/
FOK
DETECTOR
SERVO AUTO
SEQUENCER
SERVO
INTERFACE
CPU INTERFACE
18
63
62
61
19
19
SENS
20
36
37
35
56 19
SCOR
CD SQSO
CD SQCLK
CD XLT
CD CLK
CD DATA
CD SENS
CD SCOR
1 2
32 33
SCLK
COUT
9 21
SSTP
27
FOK
22
23
MIRR
DFCT
TO SERVO INTERFACE
M101
(SPINDLE)
MOTOR
DRIVE
MOTOR
DRIVE
M
M
M102
(SLED)
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC102
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
DIGITAL SERVO
PROCESSOR
IC101 (2/2)
OPTICAL PICK-UP
BLOCK
(KSM-213DCP)
SW
PD
11
12
13
14
54
56 53
55
FILTER
FILO
PCO
CLTV
FILI
EFM
DEMODULATOR
SERIAL
IN
INTERFACE
DIGITAL
FILTER,
NOISE SHAPER
PWM
&
INTEGRATOR
BUFFER
CLOCK
GENERATOR
TIMING
LOGIC
DIGITAL
OUT
INTERNAL BUS
16K
RAM
ERROR
CORRECTOR
SUBCODE
PROCESSOR
60
60
CD XRST
AIN1
AIN2
AOUT1
AOUT2
TO MIRR/DFCT/
FOK DETECTOR
FOK DETECTOR
PCMD
BCK
LRCK
C2PO
C2PO
DOUT
70
77
LOUT1
LOUT2
R-CH
72
75
71
76
A
(Page 21)
EQ
IN
IN
15
3
4
EQ
AC
SUM
17
FEI
RFDC
AMP
28
RFDCO
29
RFDCI
19
TE BAL
COIL
DRIVE
COIL
DRIVE
24
26
28
CD PWM3
CD PWM2
CD PWM1
PWM1
PWM3
PWM2
PWM3
PWM2
PWM1
XLAT
CLOK
DATA
54 CD LD-ON
78
CD MUTE
CDM IN-SW 70
CDM OUT-SW 69
IN
OUT
S1
LOADING IN/OUT
DETECT
CDM LOAD-IN 68
CDM LOAD-OUT 67
9
7
RIN
FIN
MOTOR
DRIVE
4
2
OUT1
OUT2
LOADING MOTOR
DRIVER
IC201
M201
(LOADING)
M
SYSTEM CONTROLLER
(CD MECHANISM CONTROL)
IC401 (1/4)
• SIGNAL PATH
: CD PLAY (ANALOG)
: CD PLAY (DIGITAL OUT)
• R-ch is omitted due to same as L-ch.
OPTICAL
TRANSCEIVER
IC202
CD DIGITAL OUT
OPTICAL
CD
L-CH
RFAC
VCA
When the optical
pick-up is inner
position
pick-up is inner
position
ON :
MUTING
Q201
MUTING CONTROL
SWITCH
Q203, 204
R-CH
67
66
XTAO
XTAI
X101
16.9344MHz
A+3.3V
S101
(LIMIT)
D+3.3V
HCD-CPX1
20
20
6-2.
BLOCK DIAGRAM – TUNER/TAPE DECK Section –
REC BIAS
(R)
RV603
REC BIAS
(L)
RV653
R-CH
8
7
9
4
FM 75Ω
COAXIAL
FM ANT
ANT GND
AM ANT
ANT GND
ST DIN
ST CLK
ST CE
ST MUTE
TUNED
STEREO
L-CH
R-CH
ST DOUT
TUNER UNIT
AM
R-CH
25
ST DATA IN
23
ST DATA OUT
27
ST CLK
22
ST CE
21
ST MUTE
DI
DO
CLK
CE
MUTING
57
ST TUNED
34
ST STEREO
TUNED
STEREO
L-CH
R-CH
ERASE
R-CH
HRPE901
(REC/PB/ERASE)
REC/PB SWITCHING
IC602
R-CH
BIAS OSC
T601
BIAS
TRAP
REC BIAS
SWITCH
Q639 – 641
A+9V
BIAS OSC
Q642, 643
39
37
AIN (R)
BIN (R)
15
14
3
4
EQOUT (R)
5
PB OUT (R)
TAI (R) MUTE
REC/PB EQ AMP, ALC
IC601
8
REC-
OUT (R)
OUT (R)
REC-IN (R)
ALC (R)
10
R-CH
R-CH
C
(Page 21)
PB
L-CH
B
(Page 21)
TUNER
L-CH
D
(Page 21)
REC
L-CH
42 TC BIAS-ON
SYSTEM CONTROLLER
(CD MECHANISM CONTROL)
IC401 (2/4)
• SIGNAL PATH
• R-ch is omitted due to same as L-ch.
: TUNER (FM/AM)
: TAPE PLAY
: REC
DO
CE
MUTING
TUNED
STEREO
RDS DATA
RDS INT
DATA
INT
DI
CLK
MUTE ON/OFF
REC MUTE ON/OFF
40
41
TC REC/MUTE
TC LINE MUTE
EQ
ALC
RV652
43
TC PB/REC
2
RDS DATA
18
RDS CLK
DATA
INT
7
ANTENNA
80
TC ALC
11
ALC ON/OFF
REC/PB
SWITCHING
Q680, 681
REC LEVEL
(L)
59
CAPSTAN/REEL
MOTOR DRIVE
Q692, 694
58
90
38
91
TRIGGER
PLUNGER DRIVE
Q691, 693
M
M
(TAPE DECK BLOCK)
(CAPSTAN/REEL)
TC CAPM-CONT
TC TRG
TC END SW
TC PLAY SW
TC HALF/REC/SW
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