Sony HCD-FX250 Service Manual ▷ View online
HCD-FX250
9
CD FACTORY MODE
Note 1: Do not enter the this mode while any other test mode is in prog-
ress.
Note 2: Do not enter any other test mode while the this mode is in prog-
ress.
Procedure:
1. Press the [
1. Press the [
?/1
] button to turn the power on.
2. Press the [FUNCTION] button to select CD function
3. Press three buttons of [DSGX], [DAB] and [
3. Press three buttons of [DSGX], [DAB] and [
?/1
] simultane-
ously.
4. It enters the CD factory mode and the message “FACTORY” is
displayed. When the [DSGX] button is pressed four times, the
following message (initial display) is displayed.
following message (initial display) is displayed.
– –X 1ON
S curve mode setting
Tracking servo setting
RF gain setting
Key Operation:
[DSGX]:
[DSGX]:
The display changes in the following order when-
ever the button is pressed.
ever the button is pressed.
(Initial display)
FCSAG
(
: Focus AGC value)
TRKAG
(
: Track AGC value)
RF_AG
(
: RF AGC value)
[ENTER]:
RF gain setting changes whenever the button is
pressed.
pressed.
“– –”: No gain fi xation.
“AL”: Fix to the gain for AL disc.
“RW”: Fix to the gain for RW disc.
[DAB INITIAL SCAN]:
Tracking servo setting changes whenever the but-
ton is pressed.
ton is pressed.
“ON”: Tracking servo ON.
“OFF”: Tracking servo OFF.
[FUNCTION]:
S curve mode setting changes whenever the button
is pressed.
is pressed.
“ ”: S curve mode OFF.
“S”: S curve mode ON.
5. To release from this mode, press three buttons of [DSGX],
[DAB] and [
?/1
] simultaneously.
SECTION 4
ELECTRICAL CHECK
CD SECTION
Note:
1. CD Block is basically constructed to operate without adjustment.
2. Use YEDS-18 disc (Part No. 3-702-101-01) unless otherwise indicat-
1. CD Block is basically constructed to operate without adjustment.
2. Use YEDS-18 disc (Part No. 3-702-101-01) unless otherwise indicat-
ed.
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 specifi ed value with the following checks.
5. Check the focus bias check when optical pick-up block is replaced.
FOCUS BIAS CHECK
Procedure:
1. Connect the oscilloscope to CL102 (RFOUT) and CL117
1. Connect the oscilloscope to CL102 (RFOUT) and CL117
(VREF) on the BD73 board.
2. Press the [
?/1
] button to turn the power on, and press the
[FUNCTION] button to select CD function.
3. Set disc (YEDS-18) and press the [
u] button to playback.
4. Confi rm that oscilloscope waveform is as shown in the fi gure
below (eye pattern).
A good eye pattern means that the diamond shape (
◊) in the
center of the waveform can be clearly distinguished.
Checking Location:
+
–
–
BD73 board
oscilloscope
(DC range)
CL102 (RFOUT)
CL117 (VREF)
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level:
1.1 ± 0.4 Vp-p
– BD73 Board (Conductor Side) –
IC101
CL102
(RFOUT)
CL117
(VREF)
HCD-FX250
10
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM - CD, TUNER Section -
B
C
D
D
E
A
F
SP+
SP-
LD
MD
VREF
AUTOMATIC
POWER
CONTROL
Q201
FOCUS/TRACKING COIL DRIVE,
SLED/SPINDLE MOTOR DRIVE
IC301
VO1+
2
VO1-
1
IN1 3
BIAS 23
SL+
SL-
VO2-
12
VO2+
11
IN2’ 9
T+
T-
VO3+
18
VO3-
17
IN3’ 20
F+
F-
VO4+
26
VO4-
27
IN4’ 24
MUTE 7
7 BIN
6 CIN
8 DIN
6 CIN
8 DIN
13 EIN
5 AIN
14 FIN
18 LDD
LDS
11 VREF
25 SPDO
19
24 SLDO
23 TDO
22 FDO
XOUT
XIN
X101
16.934MHz
S001
(LIMIT)
72
73
LIMIT-SW (CONT3) 32
LCHO
CD L
76
RCHO
R-CH
78
CE 43
CL 44
O-CD-CE
1
O-CD-CLK
5
DO 46
DI 45
I-CD-DI
4
O-CD-DO
3
O-CD-M-MUTE
2
O-CD-RES
A
B
I-CD-SW
88
94
I-DAB_RXD
93
O-DAB_TXD
3
CN5001
ANTENNA
DAB/FM
SW880
(CD LID OPEN/CLOSE DETECT)
R-CH
DAB L
6,*1$/3$7+
: CD PLAY
5FKLVRPLWWHGGXHWRVDPHDV/FK
: TUNER (DAB/FM)
SYSTEM CONTROLLER
IC801 (1/2)
47
RESB
CD-MP3 PROCESSOR
IC101
100
OPTICAL PICK-UP BLOCK
(DA11MMVGP)
DAB1
DAB TUNER MODULE
SIGNAL
S1_DIN
AUDR
AUDL
S1_DOUT
LINE AMP
IC370
(Page 11)
(Page 11)
HCD-FX250
HCD-FX250
11
11
5-2. BLOCK DIAGRAM - OUTPUT, PANEL, POWER SUPPLY Section -
SYSTEM CONTROLLER
IC801 (2/2)
RESET 11
35
O-POWER
MAIN POWER
ON/OFF CONTROL
Q909
+9V
REGULATOR
IC901
RESET SIGNAL
GENERATOR
IC802
+4V
REGULATOR
IC970
+9V
+7V
REGULATOR
Q915, 931, 932, 940
REGULATOR
Q910, 930, 934
RESET
SWITCH
Q802
SYSTEM +3.3V
D801
D907
VSTBY
RECT
D925 – 928
I_POWER_MONITOR 26
X802
15MHz
Main Clock (15MHz)
Main Clock (15MHz)
16
15
X801
32.768kHz
Sub Clock (32kHz)
Sub Clock (32kHz)
13
12
I-RMC(SIRCS)
29
REMOTE CONTROL
RECEIVER
IC860
LED DRIVE
Q860
D860
(LCD BACK LIGHT)
O-LED-LCD
87
LCD801
LIQUID
CRYSTAL
DISPLAY
ROTARY
ENCODER
S850
VOLUME
S820 – 824,
S830 – 833
(FRONT PANEL KEYS)
I-KEY1, I-KEY2
19, 20
I-VOL-ENC-A,
I-VOL-ENC-B
I-VOL-ENC-B
32, 33
COM1 – COM4
83 – 86
SEG1 – SEG32
46 – 53, 56 – 79
_I-AC-CUT 27
VM (7V)
AMP VCC
DAB +1.2V
D953, 954
D802
+1.2V
REGULATOR
IC754
CD +3.3V
+3.3V
REGULATOR
IC980, Q981, 982
OVER VOLTAGE
DETECT
Q960
D910
D913
D931
PROTECT
DETECT
Q987 – 989
30
I-PROTECT
38
O-DAB-1.2V
36
O-CD-POW
PROTECT
SWITCH
Q801
R-CH
R-CH
J320
5 IN-L4
28
SDA
27
SCL
32
12
IN-L1
SEL L
1 IN-L2
O-AUDIO IC-DA
TA
23
O-AUDIO IC-CLK
24
I-LEVEL
25
O-AMP-ON
34
13
VOL L
ELECTRICAL VOLUME,
INPUT SELECTOR
IC301
: TUNER (DAB/FM)
: CD PLAY
SIGNAL PATH
R-ch is omitted due to same as L-ch.
: AUDIO IN
A
CD L
B
DAB L
MIXER
IC310
25
OUT L
24
SB L
J350
R-CH
PHONES
POWER
AMP
IC350
STANDBY
SWITCH
Q902, 903
LEVEL
DETECT
Q301, 302
+
–
–
–
+
J351
OVER LOAD
DETECT
Q150, 250
AUDUO IN
39
O-DAB-3V
S840
I/
1
_I_WAKEUP
28
SPEAKER
R
L
RECT
D901, 904,
D905, 906
T002
SUB POWER
TRANSFORMER
T001
MAIN POWER
TRANSFORMER
(AC IN)
RY001
F002
DAB +3.3V
+3.3V
REGULATOR
IC950
(Page 10)
(Page 10)
HCD-FX250
HCD-FX250
12
12
For Schematic Diagrams.
Note:
• All capacitors are in μF unless otherwise noted. (p: pF) 50
• All capacitors are in μF unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specifi ed.
• f : internal component.
•
C : panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
For Printed Wiring Boards.
Note:
•
•
X : Parts extracted from the component side.
•
Y : Parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Indication of transistor.
C
B
These are omitted.
E
Q
Caution:
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
Parts on the pattern face side seen
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
• Circuit Boards Location
BD73 board
POWER-TR board
REG board
PANEL board
MAIN board
PT board
MODULE (DAB TUNER)
(DAB1)
(DAB1)
•
A : B+ Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
– CD Board –
no mark : CD PLAY
– Other Boards –
no mark : TUNER (FM)
( ) : CD PLAY
• Voltages are taken with VOM (Input impedance 10 M
no mark : CD PLAY
– Other Boards –
no mark : TUNER (FM)
( ) : CD PLAY
• Voltages are taken with VOM (Input impedance 10 M
Ω).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F :
TUNER
(DAB/FM)
J
: CD PLAY
f :
AUDIO
IN
Note: The components identifi ed by mark
0 or dotted
line with mark
0 are critical for safety.
Replace only with part number specifi ed.
• Waveforms
– BD73 Board –
– PANEL Board –
1
IC101 us (XOUT)
1 V/DIV, 50 ns/DIV
59 ns
2.2 Vp-p
0
IC801
qd (Sub Clock (32kHz))
qd (Sub Clock (32kHz))
2 V/DIV, 20
Ps/DIV
30.4
Ps
3 Vp-p
qa
IC801
qh (Main Clock (15MHz))
qh (Main Clock (15MHz))
1 V/DIV, 50 ns/DIV
67 ns
2.4 Vp-p
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