Symphonic ST419E - Page 37

Input: NTSC Color Bar Signal (with 1kHz Audio Signal)
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%
)
WF1 ~ WF16 = Waveforms to be observed at
Waveform check points.
(Shown in Schematic Diagram.)
10 V 5 ms
1DIV: 200V 20µsec
CN 571 Pin 1
W
F9
GND
1DIV: 5V 20µsec
WH501A Pin 3
WF10
GND
1DIV: 2V 5msec
IC 551 Pin 7
W
F11
1DIV: 10V 5msec
CN 571 Pin 4
WF12
1DIV: 20V 20µsec
Q 502 Collector
WF14
1DIV: 20V 20µsec
Q503 Collector
WF13
1DIV: 20V 20µsec
Q 501 Collector
WF15
1DIV: 0.2V 20µsec
TU 1 Pin 8
WF16
L14WF8-2