Sony SLV-L49 - Input;Output Levels and Impedance; Adjustment Sequence; Power Supply Check; Output Voltage Check (MA-341 Board)

6-2
1-5. Input/Output Levels and Impedance
Video input: LINE IN
Input signal: 1 Vp-p, 75 ohms, unbalanced,
sync negative
Video output: LINE OUT
Output signal: 1 Vp-p, 75 ohms, unbalanced,
sync negative
Audio input: LINE IN
Input level: –7.5 dBs
(0 dBs= 0.775 Vrms)
Input impedance: more than 47 kilohms
Audio output:LINE OUT
Standard level: –7.5 dBs at load impedance 47
kilohms
Output impedance: less than 10 kilohms
1-6. Adjustment Sequence
The adjustments should be performed in the following sequence.
2. POWER SUPPLY CHECK
2-1. Output Voltage Check (MA-341 Board)
Mode STANDBY
+30 V Check
Measurement point C627 ‘
Specified value 31.0 – 39.0 V
–11 V Check
Measurement point C642 ’
Specified value –12.5 – – 9.5 V
+6 V Check
Measurement point Corrector of Q607
Specified value 5.56 – 6.25 V
Mode E-E
Measuring Instrument Digital voltmeter
+12 V Check
Measurement point IC601 pin 2
Specified value 11.7 –12.3 V
+5 V Check
Measurement point Emitter of Q603
Specified value 4.8 –5.4 V
MTR12 V Check
Measurement point Correcter of Q605
Specified value 12.5 –14.5 V
[Check Method]
1) Each of these supply voltages must meet its specified value.
Power Supply Check
Servo/Video System Adjustments
Audio System Adjustments