Roland JD-XA - Page 34

34
Jul. 2015 JD-XA
5. VCF2 Check
This verifies the circuit of VCF2 (Transistor Ladder Filter).
+————————————————+
|A1-VCF2: CUT Min|
|Press [ENTER] |
+————————————————+
1. Verify that the frequency of the signal shown in the figure is lower than
20 Hz.
fig.test-a-5-1.eps
2. Press Enter.
A screen like the one shown below is displayed.
+————————————————+
|A1-VCF2: CUT Max|
|Press [ENTER] |
+————————————————+
3. Verify that the frequency of the signal shown in the figure is higher than
8 kHz.
fig.test-a-5-2.eps
4. Press Enter.
A screen like the one shown below is displayed.
+————————————————+
|A1-VCF2: RES Min|
|Press [ENTER] |
+————————————————+
5. Verify that no signal is output, and then press Enter.
Execution advances to the check of the next wave form.
6. For A2-VCF2, A3-VCF2 and A4-VCF2, verify in the same way as steps 1
through 5.
7. Press to advance to the next test item.
6. VCF3 Check
This verifies the circuit of VCF3 (State Variable Filter).
+————————————————+
|A1-VCF3: CUT Max|
|Press [ENTER] |
+————————————————+
1. Verify that a signal like the one shown in the figure is output.
fig.test-a-6.eps
2. Press Enter.
A screen like the one shown below is displayed.
+————————————————+
|A1-VCF3: CUT Min|
|Press [ENTER] |
+————————————————+
3. Verify that no signal is output, and then press Enter.
Execution advances to the check of the next wave form.
4. For A2-VCF3, A3-VCF3 and A4-VCF3, verify in the same way as steps 1
through 3.
5. Press to advance to the next test item.
7. Routing Check
This verifies the signal flow of each oscillator and filter.
+————————————————+
|A1-Routing1: ON|
|Press [ENTER] |
+————————————————+
1. Verify that a signal is output, and then press Enter.
2. For A1-Routing2 through 9, verify in the same way as step 1.
* Wave forms are different for each routing.
At last, when Enter is pressed, a screen like the one shown below
appears.
+————————————————+
|A1-Routing10:OFF|
|Press [ENTER] |
+————————————————+
3. Verify that no signal is output, and then press Enter.
4. For A1-Routing11 and 12, verify in the same way as step 3.
5. For A2-Routing1 through A2-Routing12, verify in the same way as steps
1 through 4.
6. For A3-Routing1 through A3-Routing12, verify in the same way as steps
1 through 4.
7. For A4-Routing1 through A4-Routing12, verify in the same way as steps
1 through 4.
8. Press to advance to the next test item.