Sony CDX-805 User manual

COMPACT DISC CHANGER
US Model
Canadian Model
AEP Model
UK Model
E Model
SERVICE MANUAL
CDX-805
– Continued on next page –
Photo: Except US model
Model Name Using Similar Mechanism NEW
CD Drive Mechanism Type MG-250A-137
Optical Pick-up Name KSS-521A/J2RP
SPECIFICATIONS
System Compact disc digital audio system
Laser diode properties
Material: GaAlAs
Wavelength: 780 nm
Emission Duration: Continuous
Laser Output Power: Less than
44.6 µW*
* This output is the value
measured at a distance of 200
mm from the objective lens
surface on the Optical Pick-up
Block.
Frequency respones
5–20,000 Hz
Wow and flutter Below the measurable limit
Signal-to-noise ratio
99 dB
Outputs Optical digital output
BUS control output (8 PIN)
Analog audio output (RCA PIN)
Current drain 800 mA (during CD playback)
800 mA (during loading or
ejecting a disc)
Operating temperature
–10°C to +55°C (14°F to 131°F)
Dimensions Approx. 262 ×90 ×181.5 mm
(103/8×35/8×71/4in.) (w/h/d)
not incl. projecting parts and
controls
Mass Approx. 2.1 kg (4 lb. 10 oz.)
Power requirement
12V DC car battery (negative
ground)
Supplied accessories
Disc magazine (1)
Parts for installation and
connections (1 set)
Design and specifications subject to change without
notice.
Ver 1.1 2001.08
9-925-522-12 Sony Corporation
2001H0500-1 e Vehicle Company
C2001.8 ShinagawaTec Service Manual Production Group

– 2 –
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE !
SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ
DE FONCTIONNEMENT. NE REMPLACER CES COM-
POSANTS QUE PAR DES PIÈCES SONY DONT LES
NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
TABLE OF CONTENTS
1. GENERAL
Installation ......................................................................... 4
Connections ....................................................................... 5
2. DISASSEMBLY............................................................ 7
3. ELECTRICAL ADJUSTMENTS ........................... 13
4. DIAGRAMS
4-1. Block Diagram................................................................... 15
4-2. Printed Wiring Board – RF Section – ................................ 17
4-3. Schematic Diagram – RF Section –................................... 19
4-4. Schematic Diagram – MAIN Section –............................. 23
4-5. Printed Wiring Board – MAIN Section – .......................... 27
4-6. IC Pin Function Description .............................................. 35
5. EXPLODED VIEWS ................................................... 38
6. ELECTRICAL PARTS LIST .................................... 43
The laser diode in the optical pick-up block may suffer electrostatic
breakdown because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic breakdown and also use
the procedure in the printed matter which is included in the repair
parts.
The flexible board is easily damaged and should be handled with
care.
NOTES ON HANDLING THE OPTICAL PICK-UP
BLOCK OR BASE UNIT
Laser Diode Properites
• Material: GaAlAs
• Wavelength: 780 nm
• Emission Duration: continuous
• Laser Output Power: less than 44.6 µW*
* This output is the value measured at a distance of 200 mm
from the objective lens surface on the Optical Pick-up Block.
CAUTION
Use of controls or adjustments or performance of
procedures other than those specified herein may
result in hazardous radiation exposure.
Flexible Circuit Board Repairing
•Keep the temperature of the soldering iron around 270 ˚C during
repairing.
•Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
•Be careful not to apply force on the conductor when soldering or
unsoldering.
Notes on chip component replacement
•Never reuse a disconnected chip component.
•Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED
LINE WITH MARK !ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
SERVICING NOTES

–3 –
Lever (stop) ass’y
Magazine ass’y
DISC MAGAZINE GETTING OUT PROCEDURE ON THE
POWER SUPPLY IS OFF
Remove the CASE (LOWER) assembly beforehand
1) Press the lever (stop) assy to arrow direction.
2) Removal the magazine assy.
Note:Take out the magazine only when the tray is completely within
the magazine. If the disk or tray is sticking out, turn on the
power and eject the magazine.

– 4 –
SECTION 1
GENERAL
This section is extracted
from instruction manual.

– 5 –

– 6 –

– 7 –
SECTION 2
DISASSEMBLY
Note: Follow the disassembly procedure in the numerical order given.
COVER (UPPER), FRONT PANEL ASS’Y
MECHANISM DECK
1 screw
(PTT2.6 × 6)
3 lever (FL)
1 screw
(PTT2.6
× 6)
1 screw
(PTT2.6
× 6)
2 case (upper)
1 screw
(PTT2.6
× 6)
3 lever (FL)
1 screw
(PTT2.6 × 6)
4 front panel ass’y
1 two dampers (250)
2 spring (FL)
4 mechanism deck
2 spring (FL)
1 two dampers (250)
3 jack flexible board
(CN901)

–8 –
JACK BOARD, DIGITAL OUT BOARD
1 main flexible board
(CNJ12)
6 three screws
(ground)
7 main board
2 connector
(CNP301)
3 screw
(B2 × 3)
4 heat sink
5 two screws
(P 2 × 2.5)
MAIN BOARD
5 digital out board
2 screw
(BVTT2.6
× 5)
Remove the jack board
of the arrow.
3 jack board
4 screw
(BVTT2 × 6)
1 connector
(CN902)
1 connector
(CN801)

–9 –
ELEVATOR MOTOR ASS’Y (M104)
ESCUTCHEON
3 elevator motor ass’y
2 bracket (ELV motor)
1 screw
(P2
× 2.2)
3 two claws
2 Remove the claw
of the arrow A .
4 Remove the ditch
of the arrow B .
5 Remove the escutcheon
of the arrow C .
4 ditch
1 screw
(M2 × 3)
B
A
C

–10 –
CASE (UPPER) ASS’Y
CHASSIS ASS’Y
1 polyethylene washer
2
2
3 chassis ass‘y
1 two polyethylene washers
1 three screws
(B2
× 3)
1 screw
(B2 × 3)
1 two screws
(B 2 × 3)
3 Remove the edge
of the arrow
A .
4 Remove the case
(upper) ass’y of the
arrow B .
B
2
A

–11 –
RF BOARD 1
OP flexible board
(CNJ11)
2 two screws
(P2 × 2.5)
4 RF board
5 two connectors
(CNP11, 503)
5 connector
(CNP52)
SLED MOTOR ASS’Y (M102), OPTICAL PICK-UP (KSS-521A/J2RP)
1 two screws
(P2 × 3)
2 sled motor ass‘y
3 optical pick-up
(KSS-521A/J2RP)
4 Turn at the direction of the
arrow, then remove
shaft (sled) ass‘y
3 screw
(P2
× 3)

–12 –
SW BOARD, SPINDLE MOTOR ASS’Y (M101)
3 bracket
(load motor)
4 chucking motor ass‘y
(M103)
1 connector
(CNP51)
CHUCKING MOTOR ASS’Y (M103)
2 two screws (P2 × 2.5)
9 Remove the spindle motor ass‘y (M101)
of the arrow.
3 spring (chucking)
1 screw
(P2 × 2.2)
2 SW board
5 bracket (CP)
6 retainer (disc)
7
4
screw
(P2
× 2.2)
8 two screws
(P1.7 × 2.2)

– 13 –
A
B
0 V
A=B
traverse waveform
(100 track jump waveform)
VOLT/DIV : 500 mV
TIME/DIV : 2 msec
Center : 0 V
SECTION 3
ELECTRICAL ADJUSTMENTS
Note:
1. Perform adjustments as given.
2. Be sure to use the disc “YEDS-18” parts code: 3-702-101-01,
but only when indicated.
3. Power supply voltage: DC14.4 V (more than 3A).
• Focus Bias Check
[RF BOARD] – Conductor Side –
• Tracking Offset Check
[RF BOARD] – Conductor Side –
Procedure:
1. Connect the oscilloscope to RF board test point RF.
2. Put the set into play mode by loading the disc.
3. Confirm that oscilloscope waveform is clear and check RF sig-
nal level is correct or not.
Note:
Clear RF signal waveform means that the shape “≈” can be clearly
distinguished at the center of the waveform.
Procedure:
1. Connect the oscilloscope to RF board bridge point TE.
2. Put the set into play mode by loading the disc.
3. Press the =AMS +button, then, check the traverse wave-
form.
4. Confirm that the oscilloscope waveform is symmetrical on the
top and bottom in relation to 0 V dc, and check this level.
* Traverse waveform: This is the tracking error wave form ap-
pears when crossing the track.
RF signal waveform
VOLT/DIV: 200 mV
TIME/DIV: 500 nsec
level: 1.4 ±0.3 Vp-p
TP
(VC)
IC11
IC51
CNJ12
BP11
(TE)
oscilloscope
+
–
TP
(VC)
IC11
IC51
CNJ12
TP (RF)
oscilloscope
+
–

–14 –
•When gain is lowered...
The set does not play because of no focus operation.
•When gain is highered...
Operation noise is heard due to a scratch or a dust, then operation
will be unstable.
•FOCUS GAIN ADJUSTMENT
(COARSE ADJUSTMENT)
This adjustment is to be performed when replacing the following
parts.
•Optical Pick-up Block
•RV14
[RF BOARD] –Conductor Side –
Procedure:
1. Set RV14 (RF board) to the standard position.
2. Check that there is not an abnormal amount of operation noise
(white noise) from the 2-axis devise. If there is, turn RV14
slightly clockwise.
[RF BOARD] –Conductor Side –
RV14 IC11
IC51
CNJ12
MIN side
(low gain)
MAX side
(high gain)
RV14 standard positio
n

– 15 – – 16 –
CDX-805
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM
OPTICAL PICK-UP BLOCK
(KSS-521A)
41 F
42 E
38 PD1
39 PD2
I-V AMP
36 LD
37 PD
PD
LD
LD DRIVE
Q11
13
FOCUS
12
DRIVER
CONTROL
9
10 VC
IC51
4CH.SERVO DRIVER
1
TRACKING
2
DRIVER
CONTROL
5
4
27
M102
(SLED)
26
DRIVER
CONTROL
23
24
M
16
M101
(SPINDLE)
17
DRIVER
CONTROL
20
19
M
IC11
RF SIGNAL PROCESSING
SERVO AMPLIFIER
SENS2
FOK
C.OUT
XRST
27
26
24
23
RF_O
LOCK
33
19
SL_O 16
TA_O
FE_O
13
6
FEO
1
FEI
2
FOCUS
GAIN
RV14
SENS1 25
DATA
XLT
CLK
21
22
20
23
44 RF
13 SEIN
29
15 DATO
16 XLTO
17 CLKO
14 100
IC101
DIGITAL SIGNAL
PROCESSOR
PCMO
BCKO
52
54
GTOP
RFCK
XROF
62
58
64
C4M
WFCK
70
74
SCOR 75
WDCK
27 MDP
49
FOK
CNIN
XRST
LOCK
LRCK
DOUT
50
71
6XROI
7RFCK
5C4M
3WFCK
61 SCOR
GRST
XWRE
1
44
XRDE
XLT
XSOE
46
45
49
SDTO
XQOK
50
59
OSCR 60
11 DATI
9BCKI
8GTOP
4DIN
12 LRCI
1
67 13 WDCI
2XRST
IC403
TIMING
IC401
DRAM CONTROLLER
SDTI
SCK
47
48
DOUT 20
DATA
CLOCK
10
12
XLAT
SQCK
SQSO
7
11
8
SENS
GFS
9
61
SBSO 76
XRAS
XWE
28
29
XCAS
XOE 35
34
25
ı
22
·
40
ı
36
·
27
31
·
30
·
33
·
32
9
ı
12
·
14
ı
18
·
5
1
·
2
·
24
·
25
4XRAS
3XWE
23 XCAS
22 XOE
D4
D1
A9
A0
D4
D1
A9
A0
IC402
DRAM
6
57
DATA 18 8 DATA OUT.L 18
IC601
D/A CONVERTER IC602(1/2)
LINE AMP
2
31
OUT.R 17
IC602(2/2)
LINE AMP
RESET
ML
6
11
EMP 12
47 D/A.RESET
45 ML
44 EMP
IC603
CLOCK OSC
XTAI 89
5
4
XTO
XTI
22 FOK
8SENS2
54 C.OUT
21 XRST
42 XWRE
25 GRSRT
41 XRDE
29 ESPXLT
27 SDTI
28 XSOE
26 SQOK
46 GRSCOR
65 CD.CLK
67 CD.DATA
66 CD.XLT
51 SCLK
23 SENS
52 SUBQ
24 GFS
63 SCOR
31
32
X201
8MHz XTAL
EXTAL
57 MGLK
SW201
MAGAZINE
EJECT END
DETECT
60 MAG.SW
SW202
MAGAZINE
IN/OUT
DETECT
















9LIM.SW
SW1
(LIMIT)
6LOAD2
SW11
(LOAD IN)
7LOAD1
SW12
(LOAD OUT)
IC52
MOTOR DRIVER
7
M103
(CHUCKING)
1
DRIVER
CONTROL
5
4
M
4CH.F
5CH.R
• SIGNAL PATH
: CD
: DIGITAL OUT
IC202
EEPROM
6 5
11 EE.CLK
12 EE.DATA
BUSY
REQ
74
76
CCLK
CSI
CSO
78
77
79
4REQ
56 BUSY
5CCLK
6CSI
7CSO
77 WFCK
76 SCOR
9SSI
8SCLK
11
ı
18
·
64
ı
69
·
74
10
ı
3
·
25
·
24
·
21
·
23
·
2
·
26
·
1
11
ı
13
·
15
ı
19
DATA7
DATA0
ADD14
ADD0
DO7
DO0
A14
A0
20
ı
27
WE 63 27 WE
CE 62 20 CE
29
30
X501
10MHz
XTAL
EXTAL IC502
SRAM
RST
BUCK 78
IC501
CD TEXT DECODER
RESET 75
RST 30
SINGLE 20
EE.INIT 10
SWITCH
Q201
ELV.ON 69
CD.ON 68
MCK 38 RV201
EHS 39
RV202
LINER
POSITION
SENSOR
LINER POSITION
SENSOR
IC301
ELEVATOR MOTOR DRIVER
4
M104
(ELEVATOR)
5
CONTROL
DRIVER
1
7
M
BU CHK
77 EXCK
WFCK
SBSO
SCOR
IC503
CLOCK OSC
WFCK
SCOR
SBSO SCOR
IC201
SYSTEM CONTROLLER
BCK
LRCK
17
19
7BCK
9LRCK
CN901
8
1
3
7
(SONY BUS)
AUDIO OUT
R
L
A.MUTE 43 MUTE DRIVE
Q601, 602
MUTE
Q603
MUTE
Q604
ELV.F 58
ELV.R 70
A/D.SW 56 SW801
ANALOG DIGITAL
SCK
SI
48
49
SO 50
11 SCK
10 SI
9SO
BUS.ON
W.UP
55
62
EJECT 64
1BUS ON OUT
8RESET
MICON
+5V
CLK
DATA
BUS ON IN
LOF 12
RST
4
6
5
4
6
2
IC304
RESET
IC305
+5V REG.
SERVO
+5V
IC307
+5V REG.
IC601
+5V
IC306
+8V REG.
IC602
+8V
IC302
+5V
MICON
+5V
BACK-UP
SWITCH
Q301, Q302
61
B+ SW
Q305
REG.
Q303
CD ON SWITCH
Q304
2
7
4
1
2IC303
+9V REG.
MOTOR DRIVE
+9V
SW301
(EJECT)
IC302
SONY BUS INTERFACE
4
IC801
OPTICAL
DIGITAL
OUT
CDX-805
VC
VC
51
IV
IV
IV
IV
XTAI 16
X601
16MHz
H.TEMP
AVREF 37
40
TH201








28
IC604
INVERTER

– 31 –
• Waveforms
1IC101 @¶ (MDP) 5IC101 &¢ (WFCK) 9IC401 !¶ (BCK)
2.5 Vp-p
7.6 µsec
6.1 Vp-p
91 µsec
6.8 Vp-p
472 nsec
2IC101 $ª (WDCK) 6IC101 *ª (XTAI) !º IC401 !£ (WDCI)
5.7 Vp-p
7.6
µ
sec
3.4 Vp-p
59 nsec
6.4 Vp-p
11.4 µsec
7IC201 #¡ (EXTAL) !¡ IC501 @ª (EXTAL)3IC101 %º (LRCK)
6.1 Vp-p
15
µ
sec
3.4 Vp-p
125 nsec
3.3 Vp-p
100 nsec
!™ IC601 5(XTI)
8IC401 !ª (LRCK)
4IC101 ^™ (RFCK)
5.5 Vp-p
91 µsec
3.5 Vp-p
62 nsec
6.5 Vp-p
23
µ
sec