Aiwa JAX-S5 Service Manual download pdf (Page 19)

CX-JN10

1919

CD SECTION

Note:

1. CD Block is basically designed to operate without adjustment. Therefore,

check each item in order given.

2. Use YEDS-18 (3-702-101-01) unless otherwise indicated.

3. Use an oscilloscope with more than 10MΩ impedance.

4. Clean the object lens by an applicator with neutral detergent when the

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

S-CURVE CHECK

Procedure :

1. Connect an oscilloscope to TP (FE) and TP (VC).

2. Turn the power on.

3. Load a disc (YEDS-18) and actuate the focus search. (In

consequence of open and close the disc tray, actuate the focus

search)

4. Confirm that the oscilloscope waveform (S-curve) is

symmetrical between A and B. And confirm peak to peak level

within 3 ± 0.5 Vp-p.

Note: • Try to measure several times to make sure than the ratio

of A : B or B : A is more than 10 : 7.

• Take sweep time as long as possible and light up the

brightness to obtain best waveform.

RF LEVEL CHECK

Procedure :

1. Connect an oscilloscope to TP (RF) and TP (VC).

2. Turn the power on.

3. Load a disc (YEDS-18) and playback.

4. Confirm that oscilloscope waveform is clear and check if RF

signal level is correct or not.

BD board

Oscilloscope

TP(FE)

TP(VC)

symmetry

S-curve waveform

within 3

0.5Vp-

TP(RF)

BD board

oscilloscope

TP(VC)

Note: Clear RF signal waveform means that the shape “ ◊ ” can be clearly

distinguished at the center of the waveform.

Connecting Location: BD board

RF signal waveform

VOLT/DIV : 200mV

TIME/DIV : 500ns

level : 1.3

0.3Vp-

TP (VC)

TP (RF)

TP (FE)

IC721

– BD Board (Conductor side) –

SECTION 5

ELECTRICAL ADJUSTMENTS

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 71 72

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Aiwa JAX-S5 Service Manual Page 19

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