Waveforms - Sylvania 6509DD Service Manual

WF1 ~ WF20 = Waveforms to be observed at
Waveform check points.
(Shown in Schematic Diagram.)
GND
WF1 1DIV: 0.5V 20µsec
WF5
TU1001 Pin 17
WF2 1DIV: 0.5V 20µsec
WF6
IC 1201 Pin 14
GND
1DIV: 2V 20µsec WF7
WF3
Q501 Base
GND
WF8
WF4 1DIV: 2V 20µsec
Q 502 Base
1-11-1

WAVEFORMS

GND
1DIV: 2V 20µsec
WF9
1DIV: 200V 20µsec
Q 503 Base
CN 571 Pin 1
1DIV: 0.2V 20msec WF10 1DIV: 5V 20µsec
TU1001 Pin 6 WH551 Pin 3
GND
1DIV: 10V 20µsec
WF11 1DIV: 2V 5msec
Q 572 Collector
IC 551 Pin 7
10 V
WF12 1DIV: 10V 5msec
1DIV: 5V 20µsec
CN 571 Pin 4
Q 571 Base
Input: NTSC Color Bar Signal ( with 1kHz Audio Signal ) --- WF1~WF16
DVD Video( Power on ( Stop ) MODE ) --- WF17, WF18
CD( 1KHz Play ) --- WF19, WF20
INITIAL POSITION: Unplug unit from AC outlet for at least 5 minutes.
reconnect to AC outlet and then turn power on.
(Brightness---Center Color---Center Tint --- Center Contrast---Approx 70%)
GND
WF13
1DIV: 20V 20µsec
Q503 Collector
GND
WF14 1DIV: 20V 20µsec
Q 502 Collector
WF15 1DIV: 20V 20µsec
Q 501 Collector
5 ms
WF16 1DIV: 0.2V 20µsec
TU 1001 Pin 13
WF17
1DIV: 0.2V 20µsec
CN1731 Pin 12
WF18 1DIV: 0.2V 20µsec
CN1731 Pin 10
WF19 1DIV: 1V 0.5msec
CN1731 Pin 6
SPDIF 1V 0.1µsec
WF20 1DIV: 1V 0.1µsec
CN1731 Pin 1
1-11-2 X4_9WF