Sony HCD-C5 Service Manual page 44

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) –
D101
CN101
Note: It is useful to use the jig for checking the waveform. (Refer to Servicing Notes on page 6)
44
– BD (MD) BOARD (Conductor Side) –
IC151
IC190
IC101
CN105
1. I+3V
1
2. IOP
7
3. GND
4. TE
5. FE
6. VC
7. RF