Sony BKM-21D Maintenance Manual page 24

8. Connect the oscilloscope as follows.
CH1 : TP201 of BD board (Y OUT)
CH2 : TP601 of BD board (PR OUT)
EXT. TRIG. : Pin
20a
SYNC)
9. Adjust the position of the oscilloscope and coincide
the TP201 and TP 601 waveform as shown in Fig. 2-9
(1).
10. Set the oscilloscope to the delay mode and enlarge the
border between the green and magenta as shown in
Fig. 2-9 (2) and (3).
(Setting the oscilloscope to the EXT.TRIG mode)
11. Coincide the center of the TP601 (PR OUT) waveform
to the horizontal vertical center of the oscilloscope.
12. Adjust the data as follows so that the horizontal
deviation B of the TP201 (Y OUT) waveform is within
the specification.
(If deviated to the left as shown in Fig. 2-9 (2). )
YW1 : 1 → 1 → 1
YW0 : 0 → 0 → 0
YB2 : 0 → 0 → 0
YB1 : 0 → 1 → 1
YB0 : 1 → 0 → 1
(If deviated to the right as shown in Fig. 2-9 (3). )
YW1 : 1 → 1 → 0
YW0 : 0 → 0 → 1
YB2 : 0 → 0 → 1
YB1 : 0 → 0 → 1
YB0 : 1 → 0 → 1
3-10 (E)
of CN2 of the BD board (H
(1)
TP201
Enlargement
(2)
a
c
d
b
B
(3)
a
c
d
b
B
Specification B = Below 35 nsec
Fig. 2-9.
TP601
a
c
Vertical center
of the oscilloscope
d
b
PR
Horizontal vertical center
of the oscilloscope
Y
a = b
c = d
PR
Horizontal vertical center
of the oscilloscope
Y
a = b
c = d
BKM-21D