DOWNLOAD Sony CDX-C880R Service Manual ↓ Size: 10.49 MB | Pages: 68 in PDF or view online for FREE

Name: Sony CDX-C880R
Brand: Sony
SKU: 8966
Rating: 4 (1 reviews)

Model: CDX-C880R
Pages: 68
Size: 10.49 MB
Type: PDF
Document: Service Manual
Brand: Sony
Device: Car Audio
File: cdx-c880r.pdf
Date: 2018-11-20

Sony CDX-C880R Service Manual ▷ View online

– 21 –
FM RF signal
generator
antenna
terminal
set
level meter
10 k 
Ω
LINE OUT REAR
0.01 
µ
F
FM RF signal
generator
antenna
terminal
set
level meter
10 k 
Ω
LINE OUT REAR
0.01 
µ
F
FM Stereo Separation Adjustment (WIDE)
Setting :
SOURCE button : FM
Carrier frequency : 98.00 MHz
Output level
: 70 dB (3.2 mV)
Mode
: stereo
Modulation
: main : 1 kHz, 20 kHz deviation (26.5%)
  sub
: 1 kHz, 20 kHz deviation (26.5%)
  19 kHz pilot : 7.5 kHz deviation (10%)
FM stereo
Level meter
Level meter
signal generator
connection
reading (dB)
output channel
L-CH
L-CH
A
B
R-CH
L-CH
Adjust RV3 on TU10 for
minimum reading.
R-CH
R-CH
C
D
L-CH
R-CH
Adjust RV3 on TU10 for
minimum reading.
L-CH stereo separation : A – B
R-CH stereo separation : C – D
The separations of both channels should be equal.

Specification : Separation more than 24 dB

Adjustment Location : See page 23.
Procedure :
FM Stereo Separation Adjustment (NARROW)
Setting :
SOURCE button : FM
Carrier frequency : 98.00 MHz
Output level
: 70 dB (3.2 mV)
Mode
: stereo
Modulation
: main : 1 kHz, 20 kHz deviation (26.5%)
  sub
: 1 kHz, 20 kHz deviation (26.5%)
  19 kHz pilot : 7.5 kHz deviation (10%)
FM stereo
Level meter
Level meter
signal generator
connection
reading (dB)
output channel
L-CH
L-CH
A
B
R-CH
L-CH
Adjust RV4 on TU10 for
minimum reading.
R-CH
R-CH
C
D
L-CH
R-CH
Adjust RV4 on TU10 for
minimum reading.
L-CH stereo separation : A – B
R-CH stereo separation : C – D
The separations of both channels should be equal.

Specification : Separation more than 18 dB

Adjustment Location : See page 23.

Procedure :
1. Set to the test mode.
2. Push the  SHIFT  button.
3. Push the  4  button three times.
4. Push the  5  button twice and set to NARROW mode.
Ver 1.1
1. Set to the test mode.
2. Push the  SHIFT  button.
3. Push the  4  button three times.
4. Push the  5  button once and set to WIDE mode.

– 22 –
SHUF
REG
FM RF signal
generator
antenna
terminal
0.01 
µ
F
set
TP
SHUF
REG
TP
SHUF
REG
TP
SHUF
REG
AM RF signal
generator
antenna
terminal
AM dummy
antenna(50 
Ω
)
30 
Ω
65 pF
15 pF
set
SHUF
REG
MW Auto Scan/Stop Level Adjustment
Setting :
SOURCE 
n MODE button : MW

Procedure :
1. Set to the test mode. (See page 20.)
2. Push the  SOURCE  button.
3. Push the  MODE  button and set to MW.
Display
4. Push the preset  3  button.
Display
5. Adjust with the volume RV1 on TU10 so that the “MW”
indication turns to “MW0” indication on the display window.
But, in case of already indicated “MW0”, turn the RV1 so that
put out light “0” indication and adjustment.
Display
Carrier frequency : 999 kHz
30% amplitude
modulation by
1 kHz signal
output level
: 33 dB (44.7 
µ
V)

Adjustment Location : See page 23.
Carrier frequency : 98.00 MHz
Output level
: 35 dB (56.2 
µ
V)
Mode
: mono
Modulation
: no modulation

Procedure :
1. Set to the test mode. (See page 20.)
2. Push the  SOURCE  button and set to FM.
Display
FM RDS S-Meter Adjustment
Setting :
SOURCE button : FM
3. Push the preset  10  button.
4. Adjust RV10 so that the display indication is “13.0”.
Display

Specification : Display indication : 12.8 to 13.2.

Adjustment Location : See page 23.

– 23 –
TU10
RV1
MW AUTO SCAN/
STOP LEVEL ADJ
RV2
FM AUTO SCAN/
STOP LEVEL ADJ
RV10
FM RDS
S-METER
ADJ
RV3
FM STEREO
SEPARATION ADJ
(WIDE)
RV4
FM STEREO
SEPARATION ADJ
(NARROW)

Adjustment Location : tuner unit (TU10)
–set upper view–

– 24 –
4-1. IC PIN DESCRIPTIONS
• IC5 CXP84640-011Q (CD SYSTEM CONTROL) (SERVO BOARD)
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
SECTION 4
DIAGRAMS

Display

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