Service manual

The following waveforms were measured at the point of the corresponding
balloon number in the schematic diagram.
NOTE:
WAVEFORMS
49 REC
0.5V 0.5ms/div
SOUND AMP
51 POWER ON
200mV 50ns/div
T'TEXT
50 REC
0.5V 0.5ms/div
21PIN IN/OUT
46 POWER ON
0.5V 10µs/div
52 POWER ON
20mV 1ms/div
47 REC
0.5V 10µs/div
48 REC
100mV 0.5ms/div
IF
J-4
21PIN IN/OUT