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-317 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 13.5 ± 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
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com
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