Vs Adjustment; Vs Ocp; Va Adjustment; Va Ocp - Sony PFM-42B1 Service Manual
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- Operating instructions manual (294 pages) ,
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- Supplement sheet (2 pages)
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3-7-8. VS Adjustment
1. Open the load on VS and VA outputs, and set the load
on the other outputs to the minimum.
2. Apply 100 V AC.
3. Turn the STBY signal ON (short between CN7 pin-1
and pin-2), and also the VRR signal ON (short be-
tween CN4 pin-7 and CN7 pin-2).
4. Apply 0 V DC to the VRS (CN4 pin-3).
Use CN4 pin-4 as GND.
5. Adjust the RV402 so that the voltage of VS output
(between CN5 pin-2 and pin-6) is about 149 V.
6. Adjust the RV400 so that the voltage satisfies 149.2 V.
7. Adjust the RV402 so that the voltage satisfies 150 0.1 V.
8. Apply 2 V DC to the VRS.
9. Check that the voltage satisfies 170
measured value is out of the range, repeat the above
steps from 4, where in step 6, shift the adjustment
value a little, then check the voltage.
3-7-9. VS OCP
1. Set the load on each output to the minimum.
2. Apply 100 V AC.
3. Turn the STBY signal ON (short between CN7 pin-1
and pin-2), and also the VRR signal ON (short be-
tween CN4 pin-7 and CN7 pin-2).
4. Apply 0 V DC to the VRS (CN4 pin-3).
Use CN4 pin-4 as GND.
5. Connect a voltmeter to the VS output (between CN5
pin-2 and pin-6).
6. Set the load on VS output to 3.8 A, and rotate the
RV401 until the output voltage varies.
Note : Be careful, not to turn excssively, because power can not be
obtained.
3-28
3-7-10. VA Adjustment
1. Open the load on VS and VA outputs, and set the load
on the other outputs to the minimum.
2. Apply 100 V AC.
3. Turn the STBY signal ON (short between CN7 pin-1
and pin-2), and also the VRR signal ON (short be-
tween CN4 pin-7 and CN7 pin-2).
4. Apply 0 V DC to the VRA (CN4 pin-5).
Use CN4 pin-6 as GND.
5. Adjust the RV602 so that the voltage of VA output
(between CN5 pin-5 and pin-1) is about 49 V.
6. Adjust the RV600 so that the voltage satisfies 49.2 V.
7. Adjust the RV602 so that the voltage satisfies 50 0.1 V.
8. Apply 2 V DC to the VRA.
0.3 V. If the
9. Check that the voltage satisfies 70
measured value is out of the range, repeat the above
steps from 4, where in step 6, shift the adjustment
value a little, then check the voltage.
Note : As the output voltage varies according to the voltage applied to the
3-7-11. VA OCP
1. Set the load on each output to the minimum.
2. Apply 100 V AC.
3. Turn the STBY signal ON (short between CN7 pin-1
and pin-2), and also the VRR signal ON (short be-
tween CN4 pin-7 and CN7 pin-2).
4. Apply 0 V DC to the VRA (CN4 pin-5).
Use CN4 pin-6 as GND.
5. Connect a voltmeter to the VA output (between CN5
pin-5 and pin-1).
6. Set the load on VA output to 4.4 A, and rotate the
RV601 until the output voltage varies.
Note : Be careful, not to turn excssively, because power can not be
VRA, do not shift the applied voltage (2 V DC).
obtained.
0.3 V. If the
PFM-42B1, PFM-42B1E
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