Sony HCD-DX80 Service Manual ▷ View online
17
HCD-DX80
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 not adjustable level, adjust the RV301 (L-
CH) and RV351 (R-CH) on the MAIN board to repeat steps 4
and 5.
If these levels are not adjustable level, adjust the RV301 (L-
CH) and RV351 (R-CH) on the MAIN board to repeat steps 4
and 5.
Adjustable level:
CN301 PB level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
CN301 PB level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: MAIN board
[MAIN BOARD] (Component Side)
[LEAF SW BOARD] (Component Side)
REC Bias Adjustment
DECK B
Procedure:
In the MC test mode, the “REC memory mode” is convenient for
this adjustment. In the “REC memory mode” , when the REC starts
the input signal FUNCTION is switched to VIDEO automatically.
When the REC stops, the tape returns near to the recording start
position.
In the MC test mode, the “REC memory mode” is convenient for
this adjustment. In the “REC memory mode” , when the REC starts
the input signal FUNCTION is switched to VIDEO automatically.
When the REC stops, the tape returns near to the recording start
position.
1. Press MD (VIDEO) button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)
2. Insert a tape into deck B.
3. After press REC PAUSE/START button, press REC PAUSE/
3. After press REC PAUSE/START button, press REC PAUSE/
START button, then recording start.
4. Mode: Record
5. Mode: Playback
6. Confirm the playback signal recorded in step 3 becomes
adjustable level as follows.
If these levels are not adjustable level, adjust the RV304 (L-
CH) and RV354 (R-CH) on the MAIN board to repeat steps 4
and 5.
If these levels are not adjustable level, adjust the RV304 (L-
CH) and RV354 (R-CH) on the MAIN board to repeat steps 4
and 5.
Adjustable level: Playback output of 315 Hz to playback output
of 10 kHz:
±
1.0 dB
Adjustment Location: MAIN board
REC Level Adjustment
DECK B
Procedure:
In the MC test mode, the “REC memory mode” is convenient for
this adjustment. In the “REC memory mode” , when the REC starts
the input signal FUNCTION is switched to VIDEO automatically.
When the REC stops, the tape returns near to the recording start
position.
In the MC test mode, the “REC memory mode” is convenient for
this adjustment. In the “REC memory mode” , when the REC starts
the input signal FUNCTION is switched to VIDEO automatically.
When the REC stops, the tape returns near to the recording start
position.
1. Press MD (VIDEO) button to select VIDEO. (This step is not
necessary if the above test mode has already been set.)
2. Insert a tape into deck B.
3. After press REC PAUSE/START button, press REC PAUSE/
3. After press REC PAUSE/START button, press REC PAUSE/
START button, then recording start.
attenuator
set
MD/VIDEO (AUDIO) IN (J101)
1) 315 Hz
2) 10 kHz
2) 10 kHz
50 mV (–23.8 dB)
600
Ω
blank tape
CN-123
CN-123
AF OSC
+
–
–
set
recorded
portion
portion
CN301 (Pin
3
: L-CH)
(Pin
1
: R-CH)
level meter
set
MD/VIDEO (AUDIO) IN (J101)
315 Hz, 50 mV (–23.8 dB)
315 Hz, 50 mV (–23.8 dB)
blank tape
CS-123
CS-123
600
Ω
attenuator
AF OSC
+
–
–
set
recorded
portion
portion
CN301 (Pin
3
: L-CH)
(Pin
1
: R-CH)
level meter
TAPE SPEED
RV1002
RV1001
(NORMAL) (HIGH)
CN1001
T11
RV11
CN301
RV301
RV302
RV353
RV303
RV351
RV304
RV354
NO303
CN304
RV352
3 1
REC LEVEL (L)
(B)
PB LEVEL (L)
(A)
PB LEVEL (L)
(B)
REC LEVEL (R)
(B)
REC BIAS (R)
(B)
REC BIAS (L)
(B)
18
HCD-DX80
FM Tuned Level Adjustment
Procedure:
1.
1.
Supply a 98 MHz signal at 28 dB from the ANTENNA terminal.
2.
Tune the set to 98 MHz.
3.
Adjust RV11 to the point (moment) when the TUNED indicator
will change from going off to going on.
will change from going off to going on.
Adjustment Location: MAIN board
Null Adjustment
Procedure:
1.
1.
Supply a 98 MHz signal at 60 dB from the ANTENNA terminal.
2.
Tune the set to 98 MHz.
3.
Measure voltage between pin 22 and pin 3 of IC11. Adjust
T11 until the voltage becomes 0 V.
T11 until the voltage becomes 0 V.
Adjustment Location: MAIN board
Adjustment Location
[MAIN BOARD]
(Component Side)
FM RF SIGNAL GENERATOR
75
Ω
coaxial
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 28 dB (at 75
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 28 dB (at 75
Ω
open)
FM ANTENNA terminal
(TM1)
(TM1)
set
FM RF SIGNAL GENERATOR
75
Ω
coaxial
Carrier frequency : 98 MHz
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 60 dB (at 75
Modulation : AUDIO 1 kHz, 75 kHz
deviation (100%)
Output level : 60 dB (at 75
Ω
open)
FM ANTENNA terminal
(TM1)
(TM1)
set
CD SECTION
Note :
1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. Use LUV-P01 (4-999-032-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10M
3. Use an oscilloscope with more than 10M
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.
S-Curve Check
Procedure :
1. Connect an oscilloscope to TP (FEO).
2. Connect between TP (FEI) and TP (DVC) ( 1.65 V) by lead
1. Connect an oscilloscope to TP (FEO).
2. Connect between TP (FEI) and TP (DVC) ( 1.65 V) by lead
wire.
3. Turn Power switch on.
4. Load a disc (LUV-P01) and actuate the focus search. (In
4. Load a disc (LUV-P01) and actuate the focus search. (In
consequence of open and close the disc tray, actuate the focus
search)
search)
5. Confirm that the oscilloscope waveform (S-curve) is
symmetrical between A and B. And confirm peak to peak level
within 2
within 2
±
0.5 Vp-p.
6. After check, remove the lead wire connected in step 2.
Note :
• Try to measure several times to make sure than the ratio
of A : B or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the
brightness to obtain best waveform.
RF Level Check
Procedure :
1. Connect an oscilloscope CH1 to TP (RFDC) and CH2 to TP
1. Connect an oscilloscope CH1 to TP (RFDC) and CH2 to TP
(RFAC).
2. Turn Power switch on.
3. Load a disc (LUV-P01) and playback.
4. Confirm that oscilloscope waveform is clear and check if RF
3. Load a disc (LUV-P01) and playback.
4. Confirm that oscilloscope waveform is clear and check if RF
signal level is correct or not.
BD board
Oscilloscope
TP(FEO)
TP(DVC)
TP(DVC)
T11
RV11
CN301
RV301
RV302
RV353
RV303
RV351
RV304
RV354
NO303
CN304
RV352
3 1
NULL
FM TUNED LEVEL
TUNER SECTION
symmetry
S-curve waveform
within 2
±
0.5Vp-p
A
B
TP(RFDC)
TP(RFAC)
BD board
oscilloscope
TP(DVC)
19
HCD-DX80
Note :
Clear RF signal waveform means that the shape “
◊
” can be clearly
distinguished at the center of the waveform.
E-F Balance (1 Track jump) Check
Procedure :
1. Connect an oscilloscope to TP (TEO) and TP (DVC).
2. Turn Power switch on.
3. Load a disc (LUV-P01) and playback the number nine track.
4. Press the gG button. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscilloscope
1. Connect an oscilloscope to TP (TEO) and TP (DVC).
2. Turn Power switch on.
3. Load a disc (LUV-P01) and playback the number nine track.
4. Press the gG button. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscilloscope
waveform.
6. Adjust RV101 on the BD board so that the center of waveform
becomes the same voltage of DVC. (i.e. A=0V)
Adjustment Location:
[BD BOARD] (Conductor Side)
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
TIME/DIV : 500ns
level : 0.65
±
0.15Vp-p (RFDC)
1.1
±
0.4Vp-p (RFAC)
TP(TEO)
TP(DVC)
TP(DVC)
BD board
oscilloscope
level=1.0
±
0.5Vp-p
symmetry
A (DC voltage)
center of
waveform
waveform
B
DVC
1 track jump waveform
TP (TEO)
TP
(RFAC)
TP
(FEI)
TP
(RFDC)
TP (FEO)
IC101
IC103
RV101
TP (DVC)
1
15
30
1
20
21
40
60
80
41
61
16
HCD-DX80
21
21
SECTION 6
DIAGRAMS
6-1.
BLOCK DIAGRAM – TUNER/CD Section –
A
B
IC202
: FM
: CD
• Signal Path
• R-CH is omitted due to same as L-CH.
: DIGITAL OUT
FM 75
Ω
G
AM
TM1
ANT IN
1
7
IF OUT
8
OSC OUT
5
VT
FE1
FM FRONT-END
+B
(11.7V)
A+12V
Q2
FM
10
FM OSC
16
A IN
19
A OUT
20
PD
B+
(+7.4V)
B+
(+5V)
18
PLL
IC51
7
FM
15
AM OSC
9
VCO STOP
8
IF REQ
6
DO
4
DI
5
CL
3
CE
XIN
1
XOUT
22
X51
4.5MHz
RF IF
AMP
AMP
Q1
CF1
CF2
DO
DI
CL
CE
2
1
11
9
3
10
7
8
RB41
AM FRONT-END
2
AM MIX OUT
AM/IF
11
AM OSC
24
VCO STOP
12
IF REQ MUTING
10
AM RF IN
21
AM OSC
23
VCC
FM IF
1
AM/FM IF AMP, MPX
IC11
13
L OUT
14
R OUT
BUFFER
Q11
LPF11
LPF
4
AM IF IN
IFT11
R-CH
6
TUNED
7
9
STEREO
D51
ST MUTING
21
ST CE
22
ST CLK
27
ST DOUT
23
ST DIN
25
STEREO
2
TUNED
3
MASTER CONTROL
IC501(1/2)
DO
CL
CE
DI
DI
OPTICAL
PICK-UP
BLOCK
(A-MAX.3)
+5V
LD
DRIVE
Q101
RF AMP
IC103
VC
VC
VCC
PD1
PD2
I5-10
I1-6
LD
LD GND
PD
GND
F-
SW
F+
T-
T+
27
12
VFC
25
A
6
B
7
C
8
D
9
E
10
F
11
LD
1
PD
2
IC102
MOTOR/COIL DRIVE
CH1RO
13
CH1FO
14
CH2RO
11
CH2FO
12
CH3RO
18
CH3FO
17
M
M102
SLED
MOTOR
CH4RO
16
CH4FO
15
M
M101
SPINDLE
MOTOR
3
CH1RI
2
CH1FI
6
CH2RI
5
CH2FI
23
CH3RI
24
CH3FI
25
CH4INS
20
MUTING
MDP
26
SFDR
28
SRDR
29
TRDR
30
TFDR
31
FRDR
32
FFDR
33
SSTP
27
DIGITAL SIGNAL PROCESSOR
D/A CONVERTER
IC101
DIGITAL SERVO
60
D OUT
RFAC
51
28
RFDCO
15
RFAC
SW
16
FE
18
TE
19
TE BAL
RFDC
43
FE
39
TE
41
SE
40
72
L OUT
OUT
IC201
75
R OUT
5
DATA
R-CH
L OUT
L-CH
7
CLOK
6
XLAT
2
SQCK
9
SCLK
20
SCOR
1
SQSO
66
XTAI
67
XTAO
3
XRST
X101
16.9344MHz
CD DATA
35
CD CLK
37
XLT
42
SQ CLK
33
SCOR
19
SQ DATA
32
XRST
43
TBL ADDRESS
SENSOR
49
T SENS
IC711
48
BU UP/DOWN SW
46
OPEN SW
47
CLOSE SW
44
LOAD IN
OPEN/CLOSE
S701
BU UP/
DOWN
S711
45
LOAD OUT
MOTOR
DRIVE
9
7
4
2
M
IC701
TURN
MOTOR
M721
6
12
IF IN
RV11
+B
(+7.4V)
AFC
22
BU PWM2
26
HOLD
40
BU PWM3
24
BU PWM1
28
29
RFDCI
17
FEI
+3.3V
REG
Q102
DVDD
+3.3V
8
SENS
13
12
1
2
11
10
3
4
9
8
5
6
SENS
34
DIGITAL
OPTICAL
OPTICAL
CD DIGITAL OUT
E-F
BALANCE
RV101
(Page 22)
(Page 22)
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