Fostex D-108 Service Manual page 18

D-108
4-5-5. S/P DIF In/Out (44.1kHz) Check
By connecting the DATA IN and OUT terminals, this tests checks if the S/P DIF signal output by itself is correctly
received. If the PLL circuit is not in a "LOCKED" condition, the prompt below will be displayed.
OL
0
3
6
9
12
18
24
30
42
The following is considered to be the cause of problem.
* Defect on DIGITAL OUT
- No oscillation of resonator X1.
- Connector J4, gate array U5, U20 and / or surrounding circuit are defective.
* Defect on DIGITAL IN
- Connector J5, gate array U5, U20 and / or surrounding circuit are defective.
- PLL circuit (U10 and surrounding circuit) are defective.
* The SETUP "DIGITAL IN" is set other than "L: - R: -".
Even if the before mentioned prompt is displayed, pressing the EXECUTE/YES key would reach the next test.
4-5-6. Adat In/Out (48kHz) Check
By connecting the DATA IN and OUT terminals, this tests checks if the ADAT digital signal output by itself is correctly
received. If the PLL circuit is not in a "LOCKED" condition, the prompt below will be displayed.
OL
0
3
6
9
12
18
24
30
42
The following is considered to be the cause of problem.
* Defect on DIGITAL OUT
- No oscillation of resonator X2.
- Connector J4, gate array U5, U20 and / or surrodunding circuit are defective.
* Defect on DIGITAL IN
- Connector J5, gate array U5, U20 and / or surrounding circuit are defective.
- PLL circuit (U22, 23, 35, 36, 37, 38, 39 and / or surrounding circuit) are defective.
* The SETUP "DIGITAL IN" is set other than "L: - R: -".
Even if the before mentioned prompt is displayed, pressing the EXECUTE/YES key would reach the next test.
18
5
1 2 3 4 6 7
1 2 3 4 5 6
7
8
8
44.1kHz
48kHz