44
1
2
3
4
1
2
3
4
C
D
F
A
B
E
XV-DV303
1
IC301 - pin 3 [RF]
V: 200mV/div. H: 0.1
µ
sec/div.
3
IC1921 - pin 3 [AUDIO DAC -LRCK]
V: 2V/div. H: 5
µ
sec/div.
2
IC251 - pin 24 [FG]
V: 1V/div. H: 5msec/div.
1
2
IC1921 - pin 16 [AUDIO DAC -MCK]
V: 1V/div. H: 20nsec/div.
IC1921 - pin 1 [AUDIO DAC -BCK]
V: 2V/div. H: 200nsec/div.
GND
5
IC601 - pin 116 [LOAD_DRV]
V: 1V/div. H: 5
µ
sec/div.
4
IC301 - pin 42 [SPDL_PDM]
5
4
IC1921 - pin 3
[AUDIO DAC -LRCK]
V: 2V/div. H: 500nsec/div.
IC1921 - pin 1
[AUDIO DAC -BCK]
V: 2V/div. H: 500nsec/div.
6
IC1921 - pin 2
[AUDIO DAC -DATA]
V: 2V/div. H: 500nsec/div.
(DATA is unsettled)
8
IC1941 - pin 24, 25
[Component Video output -Y]
V: 1V/div. H: 10
µ
sec/div.
9
IC1941 - pin 21, 22
[Component Video output -Cb]
V: 2V/div. H: 10
µ
sec/div.
11
IC1941 - pin 27, 28
[S Video output -Y]
V: 1V/div. H: 10
µ
sec/div.
12
Foot of C1951 (IC1941 - pin 33)
[S Video output -C]
V: 1V/div. H: 10
µ
sec/div.
10
IC1941 - pin 18, 19
[Component Video output -Cr]
V: 2V/div. H: 10
µ
sec/div.
7
IC1941 - pin 30, 31
[Composite Video output]
V: 1V/div. H: 10
µ
sec/div.
DVDM ASSY
B
Measurement condition : No. 1 and 2 : reference A1 (DVD), T2-chp 19, Color-bar
DVD IF ASSY
C
Measurement condition : No. 1 to 6 : reference A1 (DVD), T2-chp 1
No. 7 to 12
: reference A1 (DVD), T2-chp 19, Color-bar
GND
4
5
6
8
9
11
12
10
[Tray stops]
[Tray is opening]
[Tray is closing]
[PLAY]
[STOP
→
PLAY
→
STOP]
[STOP]
STOP
STOP
PLAY
Accelertar
ON
Brakes
ON
V: 2V/div. H: 500nsec/div.
V: 2V/div. H: 500nsec/div.
3
IC251 - pin 2, 4, 7
[Spindle driver -A3, A2, A1]
V: 2V/div. H: 2msec/div.
[PLAY]
V: 2V/div. H: 1sec/div.
Note : The encircled numbers denote measuring point in the schematic diagram.
3.15 WAVEFORMS