6-2
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
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-397 Board)
Mode
STANDBY
+30 V Check
Measurement point
C671
3
Specified value
31.0 to 39.0 V
–11 V Check
Measurement point
Anode of D420
Specified value
–12.5 to – 9.5 V
D+6 V Check
Measurement point
Collector of Q674
Specified value
5.56 to 6.25 V
Mode
E-E
Measuring Instrument
Digital voltmeter
SW+12 V Check
Measurement point
IC660 pin
2
Specified value
11.7 to 12.3 V
SW+5 V Check
Measurement point
Emitter of Q662
Specified value
4.8 to 5.4 V
MTR12 V Check
Measurement point
Collector of Q600
Specified value
12.5 to 14.5 V
F Check
Measurement point
ND420
e;
to
1
Specified value
2.0 to 5.0V
[Check Method]
1)
Each of these supply voltages must meet its specified value.
Power Supply Check
Servo/Video System Adjustments
Audio System Adjustments
Summary of Contents for SLV-LX80S
Page 28: ...SLV LX80S 3 1 3 2 SECTION 3 BLOCK DIAGRAMS 3 1 OVERALL BLOCK DIAGRAM ...
Page 30: ...SLV LX80S 3 3 SERVO SYSTEM CONTROL BLOCK DIAGRAM 90 89 87 95 79 80 39 36 43 3 5 3 6 ...
Page 31: ...SLV LX80S 3 4 TUNER BLOCK DIAGRAM 3 7 3 8 ...
Page 33: ...SLV LX80S 3 6 POWER BLOCK DIAGRAM CHILEAN MEXICAN 3 11 3 12E ...
