Service manual

SERVICE MANUAL
IC DATA AND WAVEFORMS OF KEY POINTS
(continued)
MM1031
Video Amplifier
1. Outline
This IC is a 6dB amp for video signals (Y or composite signals). Gain is fixed at 6dB and it is used in
75e Signals). Gain is fixed at 6dB and it is used in 75Ω output circuits.
2. Features
1) For video signal (Y or composite) amplification
2) Built-in clamp circuit
3) 75
driver built in
4) Frequency response 7MHz
5) Current consumption 4mA typ.
6) Power supply voltage 5V
3. Block Diagram
25
Fig. 17
4. Refer to Table 14 about Functions and Service Data of MM1031
s Each Pin.