Y Out Level Adjustment (Bypass Mode); Clamp Pulse Width Adjustment (Ntsc); Burst Gate Pulse Width Adjustment (Ntsc); F0 Adjustment (Ntsc) - Sony TRINITRON PVM-14L5 Service Manual

4-3-2. Y OUT Level Adjustment (BYPASS
Mode)
1. Input the Y-signal of the SMPTE/EBU N-10 level
without burst to the VIDEO IN connector of LINE A.
2. Adjust Y LEVEL (AE_08) in the menu until the
signal level at TP801 meets the standard value.
A
Standard value : A = 620
Fig. 4-26
4-3-3. Clamp Pulse Width Adjustment
(NTSC)
1. Input the NTSC 100 % color bar signal to the VIDEO
IN connector of INPUT A.
2. Adjust CLP W (A-02) of the menu until the pulse
width at TP2801 meets the standard value.
Standard value : A = 1.5
Fig. 4-27
4-3-4. Burst Gate Pulse Width Adjustment
(NTSC)
1. Input the NTSC 100 % color bar signal to the VIDEO
IN connector of INPUT A.
2. Adjust BGP W (AE_10) of the menu until the wave-
form at TP2804 meets the standard value with refer-
ence to the waveform at TP801.
TP801
TP2804
Standard value : A = 3.4
Fig. 4-28
PVM-14L5/20L5/D14L5A/D20L5A
±
10 mv
A
±
0.25 u u u u u sec
A
±
0.1 u u u u u sec

4-3-5. 3.58 f0 Adjustment (NTSC)

1. Input the NTSC 100 % color bar signal to the VIDEO
IN connector of INPUT A.
2. Short circuit IC2803 pin-1 and TP2803 (5 V).
3. Adjust F0 (AE_1A) of the menu until the waveform at
TP3802 moves slowly as shown.
Fig. 4-29

4-3-6. Phase Adjustment (NTSC)

1. Input the NTSC color bar signal in which B-Y signal is
turned OFF, to the RGB/COMPONENT connector.
2. Adjust the SUB PHASE of the menu until waveform
at TP3802 becomes flat as shown.
Standard value : A = 10 mV or less
Fig. 4-30
3. Input the NTSC color bar signal in which R-Y signal is
turned OFF, to the RGB/COMPONENT connector.
4. Adjust the R-Y PHASE (AE_16) of the menu until
waveform at TP3801 becomes flat as shown.
Standard value: B = 10 mV or less
Fig. 4-31
A
B
4-9