CDX-C680, CDX-C780 - Sony Car Audio Service Manual (repair manual)

Model
CDX-C680 CDX-C780
Pages
16
Size
85.96 KB
Type
PDF
Document
Service Manual
Brand
Device
Car Audio / SUPPLEMENT-3
File
cdx-c680-cdx-c780-1-2-3.pdf
Date

View Sony CDX-C680 / CDX-C780 Service Manual online

– 1 –
SERVICE MANUAL
US Model
CDX-C680/C780
SUPPLEMENT-1
File this supplement with the service manual.
Subject : Change of Key, Main, Relay and Servo Boards
When performing service and inspection, check the suffix of the part number of
the key, main, relay and servo boards.
(ECN-CS800990)
- KEY BOARD - (SIDE B)
- RELAY BOARD - (SIDE A)
- MAIN BOARD - (SIDE A)
- SERVO BOARD - (SIDE A)
Key board Part No.
Former : 1-669-502-11
New     : 1-669-502-12
Main board Part No.
Former : 1-668-087-11
New     : 1-668-087-12
Servo board Part No.
Former : 1-664-298-13
New     : 1-664-298-14
Relay board Part No.
Former : 1-668-088-11
New     : 1-668-088-12
– 2 –
1. IC PIN DESCRIPTION
• IC5 CXP84640-011Q (CD SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1 – 5
NCO
Not used in this set.
6
FP OPEN
I
Front panel open detection input
7
FP CLOSE
O
Front panel close control output
8
LINKOFF
I
Bus interface link input (Not used in this set.)
9
DRV OE
O
Focus/tracking coil/sled motor control output
10
D SW
I
Down switch input (SW4)
11 – 13
NCO
Not used in this set.
14
LM EJ
O
Loading motor control output
15
LM LOD
O
Loading motor control output
16
EMPH O
O
De-emphasis ON/OFF control output
17
CDMON
O
CD mechanism deck power control output
18
CD ON
O
CD power control output
19
A MUT
O
System attenuate control output
20
LD ON
O
Lazer power ON/OFF control output
21
CD RST
O
CD system reset output
22 – 24
Not used in this set.
25
PH3
I
Not used in this set.
26
TSTIN0
I
Not used in this set.
27
TSTIN1
I
Not used in this set.
28
TST CLV
I
Not used in this set.
29
NCO
Not used in this set.
30
RESET
I
System reset input (“L” = Reset)
31
X IN
I
X’tal oscillator input of system clock. (10 MHz)
32
X OUT
O
X’tal oscillator output of system clock. (10 MHz)
33
GND
Analog GND
34
XT OUT
O
Not used in this set.
35
XT IN
I
Not used in this set.
36
AVSS
A/D converter GND
37
AVREF
I
A/D converter reference voltage input
38
TEP L
I
Not used in this set.
39
TEP H
I
Not used in this set.
40
NCO
Not used in this set.
41
PH2
I
Not used in this set.
42
SCLK
O
CD-TEXT data read clock output
43
ESPXQOK
O
XQOK signal output to DRAM controller.
44
ESPSDT
I
Serial data input from DRAM controller.
45
GRSRST
O
Reaet signal output to DRAM controller.
46
GRSCOR
I
Sub-cord sync input from DRAM controller.
47
CD XLAT
O
CD signal process serial latch output
48
TX CLK
O
EEPROM serial clock output
49
TX DATA
O
EEPROM serial data output
50
UNISO
O
Not used in this set.
51
BUS CLK
I/O
Bus system serial clock input/output
52
BUS SI
I
Bus system serial interface input
53
BUS SO
O
Bus system serial interface output
54
F OK
I
Focus OK signal input
55
GFS
I
GFS signal detection input
56
SCOR
O
Sub-cord sync output
57
SENS
I
SENS signal input
58
I
Fixed at “H” in this set.
59
CD CKO
O
CD signal process serial clock output
– 3 –
Pin No.
Pin Name
I/O
Pin Description
60
BU.IN
I
Back-up power detection input
61
BUSON
I
Bus on control input
62
IN SW
I
Disc in switch input (SW2)
63
SELF SW
I
Self switch input (SW2)
64
TX CE
O
EEPROM chip enable output
65
SCK2
O
Sub Q read clock output
66
SI2
I
Sub Q 80 bit, PCM peak and level data 16 bit input
67
CD DATA™
O
CD signal process serial data output
68
ESPXWRE
O
Write signal output to DRAM controller.
69
ESPXRDE
O
Read signal output to DRAM controller.
70
ESPXLT
O
Serial data latch output to DRAM controller.
71
ESPXSOE
O
XSOE signal output to DRAM controller.
72
VDD
Power supply
73
HIN
I
Fixed at “H” in this set.
74
TEXT.ON/OFF
I
Fixed at “H” in this set.
75
PH1
I
Not used in this set.
76
FBTBSEL
I
Not used in this set.
77
CDOSEL
I
Not used in this set.
78 – 80
Not used in this set.
– 11 –
CDX-C680/C780
• Waveforms
(MODE:PLAY)
1
2
3
4
5
6
7
Approx. 620mVp-p
IC1  
  (FE)
0V
IC1  
  (RFO)
1.2Vp-p
Approx. 200mVp-p
IC1  
  (TE)
0V
IC501  
  (MDP)
2.6Vp-p
7.6
µ
sec
IC501  
  (LRCK)
5.8Vp-p
22.7
µ
sec
IC501  
  (BCK)
5.7Vp-p
474nsec
16.89MHz
IC501  
`⁄‚‹ 
  (XTAI)
3.2Vp-p
Note: The components identified by mark 
!
 or dotted line
with mark 
!
 are critical for safety.
Replace only with part number specified.
Note:
• All capacitors are in 
µ
F unless otherwise noted.  pF: 
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in 
 and 
1
/
4
 
W or less unless otherwise
specified.
%
: indicates tolerance.
¢
: internal component.
U
: B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltage and waveforms are dc with respect to ground
under no-signal conditions.
no mark : CD PLAY
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
J
: CD

Download Sony CDX-C680 / CDX-C780 Service Manual (Repair Manual)

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