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– 25 –

Procedure :
1. Set to the test mode.
2. Push the  SOURCE  button and set to FM.

Display

SOURCE button : FM

3. Push the preset  3  button.

Display

4. Adjust with the volume RV2 on FE601 so that the “FM”

indication turns to “FM0” indication on the display window.
But, in case of already indicated “FM0”, turn the RV2 so that put
out light “0” indication and adjustment.

Display

REG

SHUF1

REG

SHUF1

*1 : “REG” is displayed only for CDX-C860RDS.
*2 : CDX-C860RDS has the “98.00” displayed.

Adjustment Location : See page 27.

REG

SHUF1

*

1

*

2

*

1

*

2

*

1

*

2

When the tuner unit is defective, replace it by a new one because
its internal block is difficult to repair.

This set have the test mode function. In the test mode, FM Auto Scan/
Stop Level and AM (MW) Auto Scan/Stop Level adjustments can be
performed easier than it in ordinary procedure.

<Set the Test Mode>
1. Set the “OFF” mode.
2. Push the preset  4  button.
3. Push the preset  5  button.
4. Press the preset  1  button for more than two seconds.
5. Then the display indicates all lights, the test mode is set.

<Release the Test Mode>
1. Push the  OFF  button.

The adjustments of tuner section, should be performed according to
the following sequence.
1. FM Auto Scan/Stop Level Adjustment
2. FM Stereo Separation Adjustment
3. FM RDS S-Meter Adjustment (CDX-C860RDS only)
4. AM (MW) Auto Scan/Stop Level Adjustment

Carrier frequency : 97.9 MHz (C860)

: 98.00 MHz (C860RDS)

Output level

: 22 dB (12.6 µV)

Mode

: mono

Modulation

: 1 kHz, 22.5 kHz deviation (30%)

FM RF signal

generator

0.01 µF

antenna
terminal

set

– 26 –

SOURCE button : FM

FM RF signal

generator

0.01 µF

antenna
terminal

Carrier frequency : 98.00 MHz
Output level

: 35 dB (56.2 µV)

Mode

: mono

Modulation

: no modulation

Procedure :
1. Set to the test mode. (See page 25.)
2. Push the  SOURCE  button and set to FM.

Display

SOURCE button : FM

3. Push the preset  3  button.

Display

FM RF signal

generator

antenna
terminal

set

0.01 µF

10 k 

Ω

level meter

LINE OUT REAR

Carrier frequency : 97.9 MHz (C860)

: 98.00 MHz (C860RDS)

Output level

: 70 dB (3.2 mV)

Mode

: stereo

Modulation

: main : 1 kHz, 33.75 kHz deviation (45%) (C860)

1 kHz, 20 kHz deviation (26.5%) (C860RDS)

  sub

: 1 kHz, 33.75 kHz deviation (45%) (C860)

1 kHz, 20 kHz deviation (26.5%) (C860RDS)

  19 kHz pilot : 1 kHz, 7.5 kHz deviation (10%)

L-CH

L-CH

A

B

R-CH

L-CH

Adjust RV4 on FE601 for
minimum reading.

R-CH

R-CH

C

D

L-CH

R-CH

Adjust RV4 on FE601 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 25 dB

Adjustment Location : See page 27.

4. Push the preset  10  button.
5. Adjust RV601 so that the display indication is “16.0”.

Display

Specification : Display indication : 15.8 to 16.2.

Adjustment Location : See page 27.

SHUF1

SHUF1

SHUF1

REG

REG

REG

set

– 27 –

SOURCE 

n MODE button : AM (C860)

: MW (C860RDS)

AM RF signal

generator

AM dummy
antenna (50 

Ω

)

antenna
terminal

set

15 pF

30 

Ω

65 pF

Procedure :
1. Set to the test mode. (See page 25.)
2. Push the  SOURCE  button.
3. Push the   MODE   button and set to AM (C860) or MW (C860RDS).

Display

Adjustment Location : tuner unit (FE601)

Carrier frequency : 1000 kHz (C860)

999 kHz (C860RDS)

30% amplitude
modulation by
1 kHz signal
output level

: 33 dB (44.7 µV)

4. Push the preset  3  button.

Display

5. Adjust with the volume RV1 on FE601 so that the “AM” (C860)

or “MW” (C860RDS) indication turns to “AM0” (C860) or
“MW0” (C860RDS) indication on the display window.
But, in case of already indicated “AM0” (C860) or “MW0”
(C860RDS), turn the RV1 so that put out light “0” indication and
adjustment.

Display

*3 : CDX-C860RDS has the “MW” displayed.
*4 : “REG” is displayed only for CDX-C860RDS.
*5 : CDX-C860RDS has the “999” displayed.

Adjustment Location : tuner unit (FE601)

REG

REG

REG

SHUF1

SHUF1

SHUF1

*

4

*

3

*

5

*

4

*

3

*

5

*

4

*

3

*

5

TP

TP

TP

RV1

AM (MW) AUTO SCAN/

STOP LEVEL ADJ

RV2

FM AUTO SCAN/

STOP LEVEL ADJ

RV4

FM STEREO

SEPARATION ADJ

FE601

RV601

FM RDS

S-METER

ADJ

(CDX-C860RDS

ONLY)

–set upper view–

– 28 –

Note :
1. CD Block basically constructed to operate without adjustment.

Therefore, check each item in order given.

2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use the oscilloscope with more than 10 MΩ impedance.
4. Clean an objective lens by an applicator with neutral detergent

when the signal level is low than specified value with the following
checks.

Setting : This adjustment is performed with the set placed horizontally.

This adjustment is not required unless the following parts are replaced:
•

Optical pick-up

•

RV4

Procedure :
1. Set RV4 to the standard position. (mechanical center)
2. Check whether operation noise (while noise type) caused by the

2-axis device (lens section of the optical pick-up) is abnormally
loud.
If the operation noise is too loud, turn RV4 slightly counter-
clockwise.

•

If the gain is too low :
Focus does not function and no music is selected.

•

If the gain is too high :
Noise caused by scratches and dust is heard and the operation
becomes unstable.

Adjustment Location : servo board

Adjustment Location : servo board (component side)

Procedure :
1. Connect an oscilloscope between TP (RF) and TP (RF GND) on

the SERVO board.

2. Connect the power supply.
3. Push the  RESET  button (S502) on the main board.
4. Insert the disc (YEDS-18) and playback.
5. Adjust RV1 so that the oscilloscope waveform is clear and check

RF signal level is correct or not.

Note : Clear RF signal waveform means that the sharp “≈” can be

clearly distinguished at the center of the waveform.

RF signal waveform

•

When observing the eye pattern, set the oscilloscope to AC range
and raise the vertical sensitivity so that it may be easily seen.

Adjustment Location : servo board

VOLT/DIV: 200 mV
TIME/DIV: 500 nS

level: 1.0 – 1.5 Vp-p

CN2

RV1

FOCUS BIAS ADJ

FOCUS GAIN ADJ

RV4

IC1

IC3

IC2

SERVO board

oscilloscope

TP (RF)

TP (RF GND)

CN3

TP

(RF GND)

CN1

TP

(RF)