Sony DFX-51 User Manual
4-1 (E)
DXF-51
Section 4
Electrical Adjustments
4-1. Preparation
Make adjustment under the following conditions, unless
otherwise specified:
. BRIGHT : Mechanical center
. CONTRAST : Marker points “3 o’clock” position
. PEAKING switch : OFF
. Input signal : Enter NTSC monoscope signal to pin 6
otherwise specified:
. BRIGHT : Mechanical center
. CONTRAST : Marker points “3 o’clock” position
. PEAKING switch : OFF
. Input signal : Enter NTSC monoscope signal to pin 6
of D-sub 26-pin connector (CN702)
4-2. Switching Power Output (RV501)
Adjustment
n
All items of electrical adjustment must be checked, if this
All items of electrical adjustment must be checked, if this
adjustment was made.
1.
Connect a digital voltmeter to TP103.
2.
Rotating RV501, adjust the power to DC9.5
±
0.1 V.
4-3. H.V. (RV302) High Voltage
Adjustment
n
The H-SIZE, V-SIZE, and Heater Voltage must be
checked, if this adjustment was made.
The H-SIZE, V-SIZE, and Heater Voltage must be
checked, if this adjustment was made.
1.
Connect a high voltage meter too the HV pin of
FBT301 on the P board.
2.
Adjust RV302 to attain DC8 kV.
4-4. H-HOLD (RV104) Adjustment
Preparation : No signal input.
1.
1.
Connect a frequency counter to TP111.
2.
Adjust RV104 to attain 15.734
±
0.1 kHz.
4-5. V-HOLD (RV103) Adjustment
Preparation : No signal input.
1.
Connect a frequency counter to TP112.
2.
Adjust RV103 to attain 42
±
1Hz.
4-6. V-DUTY (RV107) Adjustment
1.
Enter PAL signal or NTSC signal to pin 6 of a D-sub
26-pin connector (CN702).
26-pin connector (CN702).
2.
Connect an oscilloscope to TP114 and observe a
waveform.
waveform.
3.
Adjust RV107 as follows.
4-7. H-LEN (L302) Adjustment
1.
Adjust L302 so as to attain the best linearity (horizon-
tal direction) of screen.
tal direction) of screen.
4-8. H-SIZE (RV301) Adjustment
n
The Heater voltage must be checked, if this adjustment
The Heater voltage must be checked, if this adjustment
was made.
1.
Adjust RV301 so that horizontal amplitude of screen
becomes 98
becomes 98
±
2 mm.
4-9. Heater Voltage Adjustment
1.
Connect a digital voltmeter to TP118.
2.
Confirm that the voltage is DC11.7
±
0.3 V.
3.
If exceeding this specification. Break the solder of
JP301 and JP302 in this order.
JP301 and JP302 in this order.
18.35
±
0.5 msec
18.35
±
0.5 msec
NTSC
PAL