Sony HCD-C5 Auto Gain Control Output Level Adjustment, Adjustment and checking Loacation

HCD-C5

16. AUTO GAIN CONTROL OUTPUT LEVEL ADJUSTMENT

Be sure to perform this adjustment when the optical pick-up is replaced.

If the adjustment results becomes “Adjust NG!”, the optical pick-up may be faulty or the servo system circuits may be abnormal.

16-1. CD Auto Gain Control Output Level Adjustment

Procedure:

1.Load the check disc (TDYS-1).

2.Press the . m “R” or M > “R” button to display “AG Set (CD)” (C11).

3.When the ENTER/YES “R” button is pressed, the adjustment will be performed automatically.

“Complete!” will then be displayed momentarily when the value is recorded in the non-volatile memory, after which the display changes to “AG Set (CD)” (C11).

4.Press the MD Z button and take out the check disc.

16-2. MO Auto Gain Control Output Level Adjustment

Procedure:

1.Load the test disc (MDW-74/GA-1).

2.Press the . “R” or > “R” button to display “AG Set (MO)” (C10).

3.When the ENTER/YES “R” button is pressed, the adjustment will be performed automatically.

“Complete!” will then be displayed momentarily when the value is recorded in the non-volatile memory, after which the display changes to “AG Set (MO)” (C10).

4.Press the MD Z button and take out the test disc.

Adjustment and checking Loacation:

– BD (MD) BOARD (Component Side) – – BD (MD) BOARD (Conductor Side) –

D101

IC101

	CN105	1. I+3V
CN101
	1

2. IOP

	7	3. GND
		4. TE
		5. FE
		6. VC
IC151		7. RF
IC190

Note: It is useful to use the jig for checking the waveform. (Refer to Servicing Notes on page 6)

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