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-318 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
www. xiaoyu163. com
QQ 376315150
9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
