Pioneer PDP-503PC Service Manual page 67

5
SUS-D Adjustment (Y DRIVE)
1ms/div
Magnify 6SF block
5µs/div
1ms/div
Magnify 6SF block
500ns/div
1ms/div
Magnify 6SF block
Lower PM
20 - 25ns
10ns/div
CH1 : Y SUS-D Under (K2225), 50V/div
CH2 : Y SUS-D Upper (K2207), 50V/div
CH4 : YPR-U1 (K2038)- Trigger, 5V/div
Trigger : 2msec delay
Waveform Confirmation after Adjustment completion
Measurement of the SUSOUT waveform
1ms/div
Magnify the adjustment waveform
500ns/div
5
6
Magnification
Magnification
Upper PM
Caution:
Not absolutely mistaking upper
and lower of waveform.
CH1 : Y SUSOUT Under (K2203), 50V/div
CH2 : Y SUSOUT Upper (K2212), 50V/div
CH4 : YPR-U1 (K2038)- Trigger, 5V/div
Trigger : 2msec delay
PDP-503PC
6
7
SUS-U Adjustment (Y DRIVE)
1ms/div
Magnify 6SF block
5µs/div
1ms/div
Magnify 6SF block
200ns/div
1ms/div
Magnify 6SF block
Lower PM
10ns/div
CH1 : Y SUS-U Under (K2224), 50V/div
CH2 : Y SUS-U Upper (K2220), 50V/div
CH4 : YPR-U1 (K2038)- Trigger, 5V/div
Trigger : 2msec delay
• Check whether there is a large gap between the CH1 and CH2 waves
in the circled part of the 500 ns graph.
• In this specific case the drive power needs to be on, but whenever
possible turn the drive power off (RS-232C command: DRF).
If the drive power is on the pulse module temperature will increase
and the waveform will be harder to measure accurately.
7
8
Magnification
Magnification
20 - 25ns
Upper PM
8
A
B
C
D
E
F
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