Waveforms - Pioneer DV-470-S Service Manual

1

3.2 WAVEFORMS

Note : The encircled numbers denote measuring point in the schematic diagram.
B
DVDM ASSY
A
Measurement condition ;
No. 2 to 9 : reference A1 (DVD), T2-chp 19, Color-bar
No. 10 to 15 : reference A1 (DVD), T2-chp 1
B
IC201-pin 39 [TROPENPWM]
3
V: 1V/div. H: 5µsec/div.
[Tray stops]
C
Foot of R201 (IC201-pin 37) [DMSO]
4
V: 1V/div. H: 10µsec/div.
[DMSO_OPEN]
D
OPEN KEY ON :
The condition which braking is worn in a turn of disc.
CN102-pin 11, 10, 9 (IC101-pin 14, 13, 12)
5
[SPINDLE (WVU)]
V: 2V/div. H: 2msec/div.
E
JA401 [Composite Video Out]
6
V: 1V/div. H: 10µsec/div.
F
18
1
2
IC101-pin 24 [FG]
2
V: 1V/div. H: 5msec/div.
[Tray is opening]
GND
V: 1V/div. H: 10µsec/div.
[DMSO_PLAY]
GND
JA401 [Component Video Out-Y]
7
V: 1V/div. H: 10µsec/div.
JA401 [Component Video Out-P
8
V: 2V/div. H: 10µsec/div.
JA401 [Component Video Out-P
9
V: 2V/div. H: 10µsec/div.
GND
IC501-pin 16 [PCMCK]
10
V: 100mV/div. H: 20nsec/div. fs=48kHz
GND
DV-470-S
2
3
GND
[Tray is closing]
GND
V: 1V/div. H: 2sec/div.
Tray :
opening
GND
PLAY
OPEN KEY ON
Braking a turn of disc
]
B
7
]
R
8
9
IC501-pin 1 [PCMBCK]
11
V: 2V/div. H: 200nsec/div.
GND
3
4
GND
[DMS~3]
GND
PLAY KEY ON :
starting a turn of disc
GND
GND
GND
GND
4