Input/Output Levels And Impedance; Adjustment Sequence; Power Supply Check; Output Voltage Check (Ma-342 Board) - Sony SLV-789HF Service Manual
Hide thumbs
Also See for SLV-789HF:
- Service manual (86 pages) ,
- Service manual (31 pages) ,
- Service manual (31 pages)
Table of Contents
Advertisement
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.
Power Supply Check
Servo/Video System Adjustments
Audio System Adjustments
2-2.
POWER SUPPLY CHECK
2-2-1.
Output Voltage Check (MA-342 Board)
Mode
+30 V Check
Measurement point
Specified value
–11 V Check
Measurement point
Specified value
+6 V Check
Measurement point
Specified value
Mode
+12 V Check
Measurement point
Specified value
+5 V Check
Measurement point
Specified value
MTR12 V Check
Measurement point
Specified value
F Check
Measurement point
Specified value
[Check Method]
1) Each of these supply voltages must meet its specified value.
6-2
STANDBY
C627 '
31.0 – 39.0 V
C642 '
–29.5 to – 23.5 V
Corrector of Q607
5.65 to 6.25 V
E-E
IC601 pin 2
11.7 to 12.3 V
Emitter of Q603
4.8 to 5.4 V
Correcter of Q605
12.5 to 14.5 V
ND420 #∞ to 1
2.0 to 5.0V
- Quick Links:
- Table of Contents
- Error Code Indication
- General
Hide quick links:
Advertisement
Table of Contents
