CMT-DC1K, HCD-DC1K - Sony Audio Service Manual (repair manual). Page 11

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HCD-DC1K
11
SECTION  4
TEST  MODE
Start
REC pause for 3 seconds
FWD REC
Fast forward
REV Play
REC pause for 3 seconds
REV REC
Rewind
FWD Play
Shut off
Shut off
Shut off
Shut off
1 minute
3 minutes
1 minute
3 minutes
Start
Open the disc tray
Close the disc tray
Play the last track
[Cold Reset]
• The cold reset clears all data including preset data stored in the
RAM to initial conditions. Execute this mode when returning
the set to the customer.
Procedure:
1. Turn ON the power.
2. Press three buttons
x
(TAPE), 
x
(CD), and
[TUNER/BAND]
 simultaneously.
3. The set is reset.
[Liquid Crystal Display All Lit Check Mode]
Procedure:
1.
Set to standby state.
2.
Press three buttons of
x
(TAPE),
x
 (CD), and
[FUNCTION]
 simultaneously.
3.
Liquid crystal display are all turned on.
4.
To exit from this mode, press the
I/1
button to turn the power
OFF.
[Tape Deck Aging Mode]
This mode can be used for operation check of tape deck section.
Procedure:
1.
Set a tape in the tape deck.
2.
Set to standby state.
3.
Press three buttons of
x
(TAPE),
x
 (CD), and 
[+]
 (TUNING)
simultaneously.
4.
The aging is executed in bellow sequence.
5.
To exit from the aging mode, press the
I/1
button to turn the
power OFF.
Aging mode sequence:
[CD Aging Mode]
This mode can be used for operation check of CD section.
Procedure:
1.
Load a CD disc.
2.
Set to standby state.
3.
Press three buttons of
x
(TAPE),
x
(CD), and 
[--]
 ( TUNING)
simultaneously.
4.
The aging is executed in bellow sequence.
5.
To exit from the aging mode, press the
I/1
button to turn the
power OFF.
Aging mode sequence:
HCD-DC1K
12
Note:
Confirm each contents of this section first of all. If the results are
not satisfied, do the adjustment.
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 the
parts adjust.
4.
The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
5.
The adjustments should be performed in the order given in this
service manual.  (As a general rule, playback circuit adjustment
should be completed before performing recording circuit
adjustment.)
6.
The adjustments should be performed for both L-CH and R-
CH.
7.
Switches and controls should be set as follows unless otherwise
specified.
• Test Tape
Record/Playback Head Azimuth Adjustment
Procedure:
1.
Mode:  Playback
SECTION  5
ELECTRICAL  ADJUSTMENTS
2.
Turn the adjustment screw and check output peaks. If the peaks
do not match for L-CH and R-CH, turn the adjustment screw
so that outputs match within 1dB of peak.
3.
Mode: Playback
4.
Repeat step 1 to 3 in playback (REV) mode.
5.
After the adjustments, apply suitable locking compound to the
pats adjusted.
Adjustment Location:
0 dB=0.775 V
DECK  SECTION
Tape
Signal
Used for
P-4-A100
10 kHz, –10 dB
Azimuth Adjustment
set
MAIN board
SPEAKER terminals (SJ301)
L-CH, R-CH
+
level meter
test tape
P-4-A100
(10 kHz, –10 dB)
Screw
position
L-CH
peak
within
1 dB
Output
level
L-CH
peak
R-CH
peak
within
1 dB
Screw
position
R-CH
peak
set
test tape
P-4-A100
(10 kHz, –10 dB)
R-CH
oscilloscope
V
H
waveform of oscilloscope
in phase 45
°
90
°
135
°
180
°
good
wrong
MAIN board
SPEAKER terminals (SJ301)
L-CH
forward
reverse
HCD-DC1K
13
IC103
TP (RF)
TP (VC)
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
 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 block is replaced.
Focus Bias Check
Procedure :
1.
Connect oscilloscope to TP (RF) and TP (VC) on the CD board.
2.
Press the
I/1
button to turn the power on, and press the
Z
(CD) button to open the CD disc tray.
3.
Put disc (YEDS-18) in and press the
u
(CD) button to play-
back.
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.
+
CD board
TP (RF)
TP (VC)
oscilloscope
(DC range)
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level:
1.2 
±
 0.1 Vp-p
s
Checking Location:
– CD  BOARD (Conductor Side) –
HCD-DC1K
15
15
SECTION  6
DIAGRAMS
6-1.
BLOCK  DIAGRAM  – CD SERVO Section –
I-V AMP
DETECTOR
(TRACKING)
(FOCUS)
2-AXIS DEVICE
LASER DIODE
A
B
C
D
F
E
6
7
8
10
11
4
2
1
5
10
6
7
D+5V
LD
PD
VCC
LD
PD
AUTOMATIC
POWER
CONTROL
Q101
5
RF
SUMMING
AMP
RF EQ
AMP
FOCUS
ERROR AMP
TRACKING
ERROR AMP
FI-V AMP
EI-V AMP
APC LD
AMP
APC PD
AMP
4
PD
16
14
13
22
21
RFO
FE
TE
LD ON
HOLD SW
LD
3
ASYMMETRY
CORRECTION
EFM
DEMODULATOR
DIGITAL
PLL
51
49
48
RFAC
ASYI
ASYO
54 56 53 55
FILO
PCO
CLTV
FILI
ERROR
CORRECTOR
16k
RAM
INTERNAL BUS
D/A
INTERFACE
SERIAL
IN
INTERFACE
DIGITAL
FILTER
NOISE SHAPER
PWM
&
INTEGRATOR
DIGITAL
OUT
• SIGNAL PATH
: CD PLAY (ANALOG)
: CD PLAY (DIGITAL OUT)
60
70
77
D OUT
AOUT1
AOUT2
AIN1
AIN2
51
51
71
76
72
75
LOUT1
LOUT2
BUFFER
CD L IN
R-CH
SUBCODE
PROCESSOR
SERVO AUTO
SEQUENCER
CPU INTERFACE
2
5
7
6
20
8
1
14
SQCK
DATA
CLOK
XLAT
SCOR
SENS
SQSO
XLON
TO
MIRR/DFCT/FOK DETECTOR
IC101 (2/2)
9
27
SCLK
SSTP
26
MDP
S101
(LIMIT)
TE
FE
RFDC
SE
41 39 43
40
A/D
CONVERTER
FOCUS/TRACKING/SLED
PWM GENERATOR
FOCUS/TRACKING/SLED
SERVO DSP
MIRR/DFCT/FOK
DETECTOR
23 22
24
DFCT
MIRR
FOK
TO
SERVO
INTERFACE
IC101 (1/2)
DIGITAL SERVO
PROCESSOR
IC101 (2/2)
14
13
12
11
17
18
15
16
CH1OUTF
CH1OUTR
CH2OUTF
CH2OUTR
CH3OUTF
CH3OUTR
CH4OUTF
CH4OUTR
CH1FIN
CH1RIN
CH2 FIN
CH2RIN
CH3FIN
CH3RIN
2
3
5
6
24
23
MOTOR
DRIVE
MOTOR
DRIVE
COIL
DRIVE
MOTOR
DRIVE
COIL
DRIVE
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC102
M
M
(SLED)
(SPINDLE)
CH4SIN
25
33
32
31
30
28
29
FRDR
FFDR
SFDR
SRDR
TRDR
TFDR
MUTE
20
MUTE
Q803
Q804
Q806
Q802
Q808
Q807
Q805
SERVO
INTERFACE
DIGITAL
CLV
3
XRST
67
66
XTAL
XTAO
X101
16.9344MHz
TIMING
LOGIC
CLOCK
GENERATOR
OPTICAL
TRANSCEIVER
IC321
VDD
OPTICAL
DIGITAL OUT (CD)
DATA
CLK
LATCH
SENS
SQSO
SQCK
XRST
HOLD
C SCOR
A
(Page 16)
RF AMP
FOCUS/TRACKING ERROR AMP
IC103
FILTER
DIGITAL SIGNAL PROCESSOR,
DIGITAL FILTER, D/A CONVERTER
IC101 (1/2)
OPTICAL
PICK-UP BLOCK
(KSS-213D)
M
M
Q802 – 808
CD ON SWITCH
• R-CH : R-ch is omitted due to same as L-ch.
HCD-DC1K
16
16
6-2.
BLOCK  DIAGRAM  – MAIN Section –
TU1
TUNER PACK
FM75
ANENNA
L
R
AM
1
2
4
9
Q810
8
Q809
10
Q811
7
Q813
Q809 – 811, 813
TUNER ON/OFF
SWITCH
31
30
17
3
LINE
OUT2
VOL2
OUT2
TREBLE
LOGIC
MIDDLE
BASS
INPUT SELECT SWITCH,
MIX, TONE CONTROL,
ELECTRICAL VOLUME
IC323
12
17
14
15
88
28
5
8
19
18
25
AUDIO IN
MD (VIDEO)
SJ302
HRPE901
(RECORD/PLAYBACK/ERASE)
R-CH
(ERASE)
R-CH
L-CH
1
3
2
REC/PB SWITCHING
IC402
REC/PB AMP, EQ AMP
IC401
(REC)
(PB)
(SW)
R-CH
R-CH
4
23
24
20
R-CH
R-CH
ALC
16
14
REC OUT L
PB L
REC
IN L
B+
(+8V)
BIAS
OSC
T401
REC BIAS SWITCH
Q402, 403
BIAS OSC
Q401
BIAS 
TRAP
T403
CD L IN
DATA
CLK
LATCH
SENS
SQSO
SQCK
XRST
HOLD
C SCOR
DATA
CLK
SDA
SCK
95
11 86 14 100
Q801
LED DRIVE
Q854
A
(Page 15)
MUTING
Q100
R-CH
B+ (+8V)
MUTING DRIVE
Q330
4
10
9
14
+
+
SJ301
L
R
SPEAKER
IMPEADANCE
USE 6 – 16
R-CH
R-CH
J301
HEADPHONE AMP
IC324
MUTING
Q815, 817
MUTING DRIVE
Q312, 313
MOS GAIN &
LEVEL SHIFT
ING STAGE
MOS
OUTPUT
STAGE
SHORT
CIRCUIT
PROTECTION
D853
IN+
IN–
STANDBY/MUTE
MUTE
STBY
B
(Page 17)
REG CON
D
(Page 17)
REC/PB
C
(Page 17)
FM ON
POWER AMP
IC201
R-CH
97
22
24
93
92
X802
32.768KHz
39
4
40
X801
4.19MHz
CAPSTAN/REEL
MOTOR DRIVE
Q601, 602
10
1
6
32
13
15
TRIGGER
PLUNGER DRIVE
Q603, 604
M
M
TAPE END DETECT
SENSOR
(TAPE DECK BLOCK)
6
5
10
2
33
M901
(LOADING)
M
M
LOADING
MOTOR DRIVE
IC320
• SIGNAL PATH
: TUNER
: CD PLAY (ANALOG OUT)
: CD PLAY (OPTICAL OUT)
: TAPE (PLAY)
: TAPE (RECORD)
: MD
OUT
FM ANT
ANT GND
AM ANT
ANT GND
L-CH
R-CH
R-CH
TUNED
DI
CK
CE
DO
R-CH
B IN L
A IN L
6
2
8
10
INPUT2
INPUT1
OUT2
OUT1
SYSTEM CONTROLLER
IC801 (1/2)
C2
A2
D2
E2
C-SQSO/
RDS-DATA
TUNED
C-DATA/TU-DATA
C-CLK/TU-CLK
C-LATCH/TU-CE
SENS2/TU-COUNT
TU-ON
REC/PB
 C-SQCK
C-XRST/FM-ON
 HOLD
C-SCOR
AU-MUTE
AMP-MUTE
H/P CHECK
TEX
TX
EXTAL1
MOT-CON
XTAL1
SOL-CON
TAPE-END
T-MODE
TC-SW
TRAY-OPEN
TRAY-CLOSE
TRAY-SW
PHONES
SI
DISC TRAY
OPEN/CLOSE DETECT
• R-CH : R-ch is omitted due to same as L-ch.
MUTING
Q414
87 REC-MUTE
96 L-MUTE
R-CH
R-CH
LINE
AMP
MUTING
Q407
TUNER
/BAND
HCD-DC1K
17
17
6-3.
BLOCK  DIAGRAM  – DISPLAY/POWER  SUPPLY Section –
ROTARY
ENCODER
RV801
VOLUME
RV801
JOG A
JOG B
21
20
36 
 34
KEY1 
 3
S801 – 816
50 
 53
COM0 
 3
LIQUID CRYSTAL
DISPLAY
LCD801
54 
 85
SEG0 
 31
REMOCON
3
REMOTE CONTROL
RECEIVER
IC802
LED DRIVE
Q855
DSG
D854
CD SYNC
D856
LED DRIVE
Q856
CD SYNC
26
27
89
38
99
VDD
RESET
WP
RESET SIGNAL
GENERATOR
IC803
+5V
(ROTARY ENCODER)
D812
D811
B+ SWITCH
Q606, 607
Q605
B+ SWITCH
Q608, 609
CASSETTE HOLDER
BACK LIGHT
D802
D
REC/PB
(Page 16)
SYSTEM CONTROLLER
IC801 (2/2)
LED DRIVE
Q853
Y
D855
TC ON 98
94
CD ON
LED DRIVE
Q852
u
D852
CD +5V
REGULATOR
Q306
B+
(CD +5V)
+10V
REGULATOR
Q305
CD +8V
REGULATOR
IC306
B+
(CD +8V)
B+
(FM +7.5V)
+9V
REGULATOR
Q301
FM +7.5V
REGULATOR
Q302
B+
(+9.5V)
B+
(COM +12V)
7
REG CON
(Page 16)
FM ON
C
RECT
D906 – 909
RECT
D902 – 905
COM +8V
REGULATOR
IC304
COM +12V
REGULATOR
Q355
B+
(COM +8V)
LED B+
SWITCH
Q661, 662
LED B+
(+8V)
B+
(+14V)
B –
( – 14V)
B+
(+22.5V)
B –
( – 22.5V)
POWER AMP
(IC101, 201)
COM  – 8V
REGULATOR
IC302
B –
(COM  – 8V)
(Page 16)
REG CON
C
B
D917
D310
B+ SWITCH
Q608, 609
B+ SWITCH
Q901
RECT
D910 – 913
RELAY +5V
REGULATOR
IC301
WAKE UP
SWITCH
Q890, 891
D801
D  S  G
D866 – 869
(LCD BACK LIGHT)
37
SIMUKE/TEST
B+ (+5V)
REGULATOR
CONTROL
SWITCH
Q303, 304
REGULATOR
CONTROL
SWITCH
Q307, 308
B+
(+5V, RELAY +5V)
(TAPE)
(CD)
T902
MAIN
TRANSFORMER
RELAY
DRIVE
Q902
RY901
AC IN
T901
SUB
TRANSFORMER
F901
HCD-DC1K
18
18
6-4.
NOTE  FOR  PRINTED  WIRING  BOARDS  AND  SCHEMATIC  DIAGRAMS
Note on Printed Wiring Boards:
X
: parts extracted from the component side.
Y
: parts extracted from the conductor side.
W
: indicates side identified with part number.
: Pattern from the side which enables seeing.
• Indication of transistor.
Note on Schematic Diagram:
• All capacitors are in 
µ
F unless otherwise noted.  pF: 
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in 
 and 
1
/
4
 
W or less unless otherwise
specified.
f
: internal component.
C
: panel designation.
A
: B+ Line.
B
: B– Line.
H
: adjustment for repair.
• Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: TUNER
E
: TAPE PLAY (DECK A)
d
: TAPE PLAY (DECK B)
G
: TAPE REC
J
: CD PLAY (ANALOG)
c
: CD PLAY (DIGITAL)
Note: The components identified by mark 
0
 or dotted line
with mark 
0
 are critical for safety.
Replace only with part number specified.
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
B
These are omitted.
C
E
Q
• Circuit Boards Location
TC board
LCD board
I/O SWITCH board
SWITCH board
HEADPHONE board
MAIN board
TUNER UNIT
POWER board
CD board
LOADING board
HCD-DC1K
19
19
5.4 Vp-p
4.19 MHz
51.2 Vp-p
12 
µ
s
44 Vp-p
11.9 
µ
s
6
IC101 
w;
 (SCOR) (CD Play Mode)
Approx.
200 mVp-p
• Waveforms
– CD Board –
1
IC103 
qh
 (RFO) (CD Play Mode)
2
IC103 
qf
 (FE) (CD Play Mode)
3
IC103 
qd
 (TE) (CD Play Mode)
4
IC101 
qg
 (WFCK)
5
IC101 
qj
 (XPCK)
7
IC101 
yh
 (XTAI)
2
REC/PB (REC Mode)
1.2 
±
0.1 Vp-p
Approx.
380 mVp-p
5.1 Vp-p
136 
µ
s
5.9 Vp-p
230 ns
13.2 ms
5 V
3 Vp-p
16.9344 MHz
– TC Board –
1
ERASE Head (REC Mode)
– MAIN Board –
1
IC801 
el
 (EXTAL1)
2
IC801 
os
 (TX)
5.4 Vp-p
32.768 kHz
HCD-DC1K
20
20
(LIMIT)
28
15
1
14
E
12
13
1
24
40
60
61
80
21
20
41
TP (RF)
(SPINDLE)
M
(SLED)
M
TP
(VC)
1-680-693-
11
(11)
A
MAIN BOARD
CN101
OPTICAL
PICK-UP
BLOCK
(KSM-213D)
CD BOARD
A
B
C
D
1
2
3
4
IC101
C-3
IC102
B-3
IC103
C-2
Q101
B-2
6-5.
PRINTED  WIRING  BOARD  – CD Board –
 See page 18 for Circuit Boards Location.
• Semiconductor
Location
Ref. No.
Location
(Page 27)
HCD-DC1K
21
21
6-6.
SCHEMATIC  DIAGRAM  – CD Board –
 See page 19 for Waveforms.
 See page 33 for IC Block Diagrams.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD PLAY
: Impossible to measure
(Page 24)
The components identified by mark 
0
 or dotted
line with mark 
0
 are critical for safety.
Replace only with part number specified.

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