Sony Car Audio Cdx 2250 3500 Manual

Ð 1 Ð
Model Name Using Similar Mechanism CDX-2180
CD Drive Mechanism Type MG-363X-121
Optical Pick-up Name KSS-521A
SERVICE MANUALUS Model
Canadian Model
CDX-2250
E Model
CDX-3500
CDX-2250/3500
FM/AM COMPACT DISC PLAYER
MICROFILM
SPECIFICATIONS
Photo: CDX-2250 

Ð 19 Ð
SECTION 4
DIAGRAMS
4-1. IC PIN DESCRIPTION
¥ IC801 µPD17705GC-537-3B9 (SYSTEM CONTROL)
Pin No. Pin Name I/O Pin Description
1 SIRCS I SIRCS input (A/D)
2 IN-SW I CD mechanism position detection
3 D-SW I CD mechanism position detection
4 SELF-SW I CD mechanism position detection
5 L-SW I LIMIT switch
6 LM-EJ O Loading motor control (Eject direction)
7 LM-LOD O Loading motor control (Loading direction)
8 AMP/ANT-ON O Power control for amplifier.
9 MONO O Force MONO output
10 SD I SD signal input
11...

Ð 20 Ð
Pin No. Pin Name I/O Pin Description
54 ILL-ON O Illumination output
55 C.ALARM I Caution alarm select input (Used/Not used)
56 NC I Not used (Connect to ground)
57 NC Ñ Fixed at ÒHÓ in this set.
58 LCD-CE O LCD drive chip select output
59 EZ-SEL I SHIFT + input
60 SENS I Information input from servo IC.
61 FOK I Focus OK input
62 LD-ON O Laser diode control
63 NC Ñ Not used. (Connect to ground)
64 [IN] ST/MONO I/O Used for both STEREO indicator display input and force MONO output. (FM)
[OUT]...

4-4. SCHEMATIC DIAGRAM Ñ CD MECHANISM SECTION Ñ ¥ Refer to page 22 for Waveforms and Note and page 37 for IC Block Diagrams.
CDX-2250/3500
Ð 25 ÐÐ 26 Ð
(Page 
33) 

Note:
¥ All capacitors are in µF unless otherwise noted.  pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
¥ All resistors are in W and 
1/4
 W or less unless otherwise
specified.
¥U: B+ Line.
¥ Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.¥C: panel designation.
¥ Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
¥ Voltages are taken with a VOM (Input impedance 10 MW).
Voltage variations may be...

Note:
¥ All capacitors are in µF unless otherwise noted.  pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
¥ All resistors are in W and 
1/4
 W or less unless otherwise
specified.
¥
¢
: internal component.
¥C: panel designation.
¥U: B+ Line.
¥ Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
¥ Voltage is dc with respect to ground under no-signal
(detuned) condition.
no mark : FM
( ) : AM
< > : CD PLAY
*
: Impossible to measure
¥...

Ð 35 ÐÐ 36 Ð
4-8. SCHEMATIC DIAGRAM Ñ MAIN SECTION (2/2) Ñ ¥ Refer to page 37 for IC Block Diagrams.CDX-2250/3500
(Page 29) 

Ð 37 Ð
¥ IC Block Diagrams
IC3  BA6796FP-T1
123 4
5
6789
101112 1314
OPOUT
CH4-IN
CH4
CTL1
CTL2
FWD
REV
TRAY
GND
CH3 –CH5 –
COM
CH4 +
CH3 +CH3-INCH3VREF
CH2
CH2-IN
VCC
VCC
CH1 –
CH2 – CH1-INOP IN –
CH1
CH1 +OP IN +
CH2 +
DRIVE
BUFFER DRIVE
BUFFER DRIVE
BUFFER DRIVE
BUFFER DRIVE
BUFFERDRIVE
BUFFERDRIVE
BUFFERDRIVE
BUFFERDRIVE
BUFFER
LEVEL
SHIFT
LEVEL
SHIFT LEVEL
SHIFT LEVEL
SHIFT
THERMAL
SHUT
DOWN15
16 17 18 19 20
21 22
23 24 25 26
27 28
LOGIC
CTL1 CTL2 FWD REVV/I
IC401  LC75374E
+
–
+
–+
–
+ –+ –
+
–
+...

Ð 38 Ð
IC2  CXA1782BQ
36 35 34
3332
3130 29 28 27 26 25
24
23
22
21
20
19
18
17
16
15
14
13
12 11
10 9 8 7
6 5
4 3
2
1 37
38
39
40
41
42
43
44
45
46
47
48
PHD 2
PHD 1
PHD
LD
RF O
RF I
CP
CB
CC1
CC2
FOK
SENS
C.OUT
XRST
DATA
XLT
CLK
VCC
ISET
SL O
SL M
SL P
TA O
TA MFSETTG2 TGU SRCHFE OFLB FGD FDFCT
FE MFEI FEO
FE BIAS
F
E
EI
VEE
TED
LPFI
TEI
ATSC
TZC
TDFCT
VCAPCLEVEL  S
FOKMIRR
RF IV AMP1
RF IV AMP2
FE AMP
TTL
IIL
FZC COMPDFCTIIL
TTL
IIL DATA REGISTER
INPUT SHIFT REGISTER
ADDRESS DECODER
OUTPUT DECODERTTL...