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Model
HCD-FX350I
Pages
40
Size
1.73 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-fx350i.pdf
Date

Sony HCD-FX350I Service Manual ▷ View online

HCD-FX350i
9
SECTION  3
TEST  MODE
COLD  RESET
The cold reset clears all data including preset data stored in the 
memory to initial conditions. Execute this mode when returning 
the set to the customer.
Procedure:
1.  In the standby status, press the [
?/1
] button to turn the power 
on.
2.  Press three buttons of [FUNCTION], [DAB INITIAL SCAN] 
and [
?/1
] simultaneously.
3.  When “RESET” appears, the set enters standby status.
PANEL  TEST  MODE
Enter The Panel Test Mode
Procedure:
1.  In the standby status, press the [
?/1
] button to turn the power 
on.
2.  Press three buttons of [ENTER], [FUNCTION] and [
?/1
] si-
multaneously 
3.  When the panel test mode is activated, segments of the liquid 
crystal display are all turned on.
Version Check
Procedure:
1.  In the panel test mode (segments of the liquid crystal display 
are all turned on), press the [DAB INITIAL SCAN] button.
2.  On the liquid crystal display, date and version are displayed.
3.  From this status, press the [DAB] button, and the destination 
and model name are displayed.
4.  To release from this mode, press three button of [ENTER], 
[FUNCTION] and [
?/1
] simultaneously .
Key Test Mode
Procedure:
1.  In the panel test mode (segments of the liquid crystal display 
are all turned on), press the [
u] button.
2.  The message “KEY0 0 0”displayed. Whenever any buttons are 
pressed the value is changed.
 
The message “VOL UP” is displayed when [VOLUME] knob 
is turned clockwise, and “VOL DOWN” is displayed when 
[VOLUME] knob is turned counterclockwise.
3.  To release from this mode, press three button of [ENTER], 
[FUNCTION] and [
?/1
] simultaneously.
CD  POWER  MANAGE
This mode is for switch the CD power supply on/off. Even if this 
state pulls out AC plug, it is held.
Procedure:
1.  Press the [
?/1
] button to turn the power on.
2.  Press the [FUNCTION] button to select CD function.
3.  Press the [
?/1
] button again to turn the power off (standby).
4.  After pressing the [DISPLAY] button on the remote com-
mander, while pressing the [
x
] button, press the [
?/1
] button.
5.  It turns power on and display “CD POWER”, then display 
“ON” or “OFF”.
CD  SERVICE  MODE
This mode can move the SLED of the optical pick-up, and also can 
turn the optical pick-up laser power on and off.
Procedure:
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], [TUNE + 
M L] and [
?/1
simultaneously.
4.  It enters the CD service mode and displays “SERVICE”.
5.  To exit from this mode, press three buttons of [DSGX], 
[TUNE + 
M L] and [
?/1
] simultaneously.
Key Operation:
[TUNE + 
M L], [– TUNE l m]: 
 
Use these keys to move the SLED. 
 
When [TUNE + 
M L] is pressed in this mode, 
the SLED moves to outer circumference and the 
message “SLED OUT” is displayed. 
 When 
[– 
TUNE 
l m] is pressed in this mode, 
the SLED moves to inner circumference and the 
message “SLED IN” is displayed. 
[FUNCTION]: 
 
Use this key to turn the optical pick-up laser power 
on and off. When the laser power is turned on, the 
message “LD ON” is displayed. When the laser 
power is turned off, the message “LD OFF” is dis-
played. 
HCD-FX350i
10
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
] button to turn the power on.
2.  Press the [FUNCTION] button to select CD function
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.
  – –X 1ON   
 
 
     S curve mode setting
 
 
     Tracking servo setting
 
 RF gain setting
Key Operation:
[DSGX]:
 
The display changes in the following order when-
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.
 
“– –”: 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.
 
“ON”: Tracking servo ON.
 
“OFF”: Tracking servo OFF.
[FUNCTION]:
 
S curve mode setting changes whenever the button 
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-
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 
(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-FX350i
11
MEMO
HCD-FX350i
12
5-1.  BLOCK  DIAGRAM - CD, TUNER Section -
B
C
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
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
SECTION  5
DIAGRAMS
(Page 13)
(Page 13)
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