Specified I/O Level And Impedance; Adjusting Sequence; Power Supply Adjustment; Power Supply Check - Sony SLV-E580EE Service Manual

2-1-5.

Specified I/O Level and Impedance

Input/output terminal
Video inputs LINE IN
EURO-AV : 21-pin (Pin @º) 1 Vp-p, 75 ,
Audio inputs LINE IN
47 kW, –75 dBs (0 dBs = 0.775 Vrms)
EURO-AV : 21-pin (Pin 2 and 6)
Video outputs LINE OUT : phono jack
EURO-AV : 21-pin (Pin !ª) 1 Vp-p, 75 ,
Audio outputs LINE OUT : phono jacks
Output impedance : less than 10 k
EURO-AV : 21-pin (Pin 1 and 3)
Output impedance : less than 1 k

2-1-6. Adjusting Sequence

Make the electrical adjustment in the following sequence.
Checking power supply
Servo system adjustment
Video system
adjustment
: phono jacks
unbalanced, sync nagative
: phono jack
More than 10 k , –4 dBs
unbalanced, sync negative
–7.5 dBs at load
impedance 47 k
–4 dBs with 10 k load
Audio system
adjustment
2-2.

POWER SUPPLY ADJUSTMENT

2-2-1.

Power Supply Check

(SR-825 BOARD)
Mode
Measuring Instrument
+F, –F check
Measurement Point
Specified Value
–11.5 V check
Measurement Point
Specified Value
D6 V check
Measurement Point
Specified Value
SW12 V
Measurement Point
Specified Value
MTR12 V check
Measurement Point
Specified Value
+13 V check
Measurement Point
Specified Value
+38 V check
Measurement Point
Specified Value
SW5 V check
Measurement Point
Specified Value
Checking Method:
1) Confirm that each voltage meets its specified value.
7-2
E-E
Digital voltmeter
Pin !§ (+), !ª (–) of CN601
2.9 ± 1 Vdc
Pin !• of , CN601
–11.5 ± 1 Vdc
Pin !¢ of CN601
5.9 ± 0.5 V
Pin !™ of CN601
12 ± 1 Vdc
Pin 7, 8 of CN601
13.5 ± 1 Vdc
Pin 5, 6 of CN201
13.5 ± 1 Vdc
Pin 4 of CN601
38.0 ± 3 Vdc
Pin 2, 3 of CN601
5 ± 0.5 Vdc