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 BAND-SW I Initialize switch input terminal
12 AREA1-SW I Initialize switch input terminal
13 AREA2-SW I Initialize switch input terminal
14, 15 RE1, 2 I Rotary encoder input 1, 2
16 SEEK O SEEK output
17 CD-ON I/O Servo drive power
18 FM-ON I/O FM select output
19 TU-ON I/O AM select output
20 NC Ñ Not used.
21 GND3 Ñ Ground
22 KEYIN3 I Not used (Connect to ground)
23, 24 KEYIN2, 1 I A/D key input 2, 1
25 ROT-IN I Rotary commander input
26 S-METER I FM and AM common signal meter A/D conversion input
27 TEST-SW I TEST mode select input
28 AM-IFC I AM center frequency input
29 FM-IFC I FM center frequency input
30 VDD2 Ñ Power supply (+5 V)
31 VCOH-FM I Local oscillation frequency input (FM)
32 VCOL-AM I Local oscillation frequency input (AM)
33 GND2 Ñ Ground
34 NC Ñ Not used.
35 EO1-PDOUT O Error out output
36 TESTO Ñ Connect to ground
37 AM-ON(TU-ON) O AM power output (AM select)
38 FM-ON(FM/AM) O FM power output (FM select)
39 LCL/DX O LOCAL/DX select (ÒHÓ : LOCAL, ÒLÓ : DX)
40 BEEP O BEEP output
41 ACC-IN I Accessory input
42 SCOR I SUBQ data read request
43 MUTE O System mute output
44 AMP-MUTE O Power amplifier mute output
45 TEL-MUTE O Telephone mute output
46 NC Ñ Fixed at ÒHÓ in this set.
47 VOL-CE O Electric volume chip select
48 VOL-CLK O Electric volume serial clock
49 VOL-DATA O Electric volume serial data
50 EMPHO O De-emphasis control output
51 PW-ON O System power control
52 MD-ON O Loading motor power
53 CD-ON O Servo drive power 
						

							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] MONO
65 LCD-CKO O LCD driver serial clock output
66 LCD-So O LCD driver serial data output
67 INH O INHbit output
68 SQ-CKo O Q data read serial clock output
69 CD-RST O Servo IC/DAC reset output
70 SQ-SI I Q data input
71 CD-SO O Serial data output to servo IC.
72 CD-LAT O Data latch output to servo IC.
73 CD-CKO O Serial clock output to servo IC.
74 VREF Ñ Not used.
75 GND1 Ñ Ground
76 X-OUT Ñ Crystal oscillator connection (4.5 MHz)
77 X-IN I Crystal oscillator connection (4.5 MHz)
78 BU-IN I Back-up detection
79 VDD1 Ñ Power supply (+5 V)
80 RESET I RESET input 
						

							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 noted due to normal production
tolerances.
4-6. SCHEMATIC DIAGRAM Ñ DISPLAY SECTION Ñ
Ð 29 ÐÐ 30 Ð
CDX-2250/3500
(Page 36) 
						

							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
¥ Voltages are taken with a VOM (Input impedance 10 MW).
Voltage variations may be noted due to normal production
tolerances.
¥ Signal path.
F: FM
f: AM
J: CD
¥ Abbreviation
CND : Canadian model.
4-8. SCHEMATIC DIAGRAM Ñ MAIN SECTION (1/2) Ñ
Ð 33 ÐÐ 34 Ð
CDX-2250/3500
(Page 26) 
						

							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
+
–
+
–+
–
+ –+ –
+
–
+
–
+
–
+
–+
–
+–+ –
+
–
+
–DECODER LATCHSHIFT
REGISTERCONTROL
–
+
+ –
12345678910
20
19
18171615
14
13
12
11
21
22
2324252627282930313233
3435363738
39
4041424344
LSELO
L4
L3
L2
L1
VDD
R1
R2
R3
R4
RSELO
RVRIN
RCOM
RT1
RT2
RT3
RTOUT
RSIN
NC
NC
RSB1
RSB2
RFIN RFOUT RROUT VSS CL DI CE VREF LROUT LFOUT LFIN
LSB2 LSB1 NC NC LSIN LTOUT LT3 LT2 LT1 LCOM LVRIN
12345678910111213141516171819202122232425
TA B
PW-GND
OUT2–
ST-BY
OUT2+
Vcc1
OUT1–
PW-GND1
OUT1+
SVR
IN1
IN2
S-GND
IN4
IN3
AC-GND
OUT3+
PW-GND3
OUT3–
Vcc2
OUT4+
MUTE
OUT4–
PW-GND4
DIAGNOSTICS OUT
IC402  TDA7385 
						

							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
IIL
TOG1-3
BAL1-3FS1-4 TG1-2 TM1-7 PS1-4
F IV AMP
E IV AMP
BAL1
BAL2
BAL 3
TE AMP
TZC COMP
DFCT
TM1
DFCT
FS4 ATSC WINDOW COMP
TOG1
TOG2
TOG3
FCS PHASE
COMPENSATION
FS1
F SETTG2
TM7TM3TM4 TM5TM6ISET TRACKING
PHASE
COMPENSATION HPF COMP
LPF COMP
TG1
FS2TM2
RF  M