Sony SLV-M20HF - Video Cassette Recorder, Service Manual

Page: 64 / 143

6-2
2-1-5. Input/Output Levels and Impedance
Video input: LINE IN
Input signal: 1Vp-p, 75ohms, unbalanced,
sync negative
Video output: LINE OUT
Output signal: 1Vp-p, 75ohms, unbalanced,
sync negative
Audio input: LINE IN
Input level: –7.5 dBs
(0dBs= 0.775Vrms)
Input impedance: more than 47 kilohms
Audio output: LINE OUT
Standard level: –7.5dBs at load impedance 47
kilohms
Output impedance: less than 10 kilohms
2-1-6. Adjustment Sequence
The adjustments should be performed in the following sequence.
2-2. POWER SUPPLY CHECK
2-2-1. Output Voltage Check (MA-335 Board)
Mode E-E
Measuring Instrument Digital voltmeter
SW 12V Check
Measurement point IC601 pin
2
Specified value 12.0 ± 0.3V
MTR12V Check
Measurement point Q605
C
Specified value 13.2 ± 1.0V
SW5V Check
Measurement point Q603
E
Specified value 5.1 ± 0.3V
[Check Method]
1)
Each of these supply voltages must meet its specified value.
Power Supply Check
Servo System Adjustments
Video System Adjustments
Audio System Adjustments
Tuner System Adjustments