7-2
Mode
E-E
Measuring Instrument
Digital voltmeter
+F, –F check
Measurement Point
Pin
!§
(+),
!ª
(–) of CN601
Specified Value
2.9 ± 1 Vdc
–11.5 V check
Measurement Point
Pin
!•
of , CN601
Specified Value
–11.5 ± 1 Vdc
D6 V check
Measurement Point
Pin
!¢
of CN601
Specified Value
5.9 ± 0.5 V
SW12 V
Measurement Point
Pin
!™
of CN601
Specified Value
12 ± 1 Vdc
MTR12 V check
Measurement Point
Pin
7
,
8
of CN601
Specified Value
13.5 ± 1 Vdc
+13 V check
Measurement Point
Pin
5
,
6
of CN201
Specified Value
13.5 ± 1 Vdc
+38 V check
Measurement Point
Pin
4
of CN601
Specified Value
38.0 ± 3 Vdc
SW5 V check
Measurement Point
Pin
2
,
3
of CN601
Specified Value
5 ± 0.5 Vdc
2-2.
POWER SUPPLY ADJUSTMENT
2-2-1.
Power Supply Check
(SR-825 BOARD)
Checking Method:
1) Confirm that each voltage meets its specified value.
Checking power supply
Video system
adjustment
Servo system adjustment
Audio system
adjustment
2-1-5.
Specified I/O Level and Impedance
Input/output terminal
Video inputs
LINE IN
: phono jacks
EURO-AV : 21-pin (Pin
@º
) 1 Vp-p, 75
Ω
,
unbalanced, sync nagative
Audio inputs
LINE IN
: phono jack
47 kW, –75 dBs (0 dBs = 0.775 Vrms)
EURO-AV : 21-pin (Pin
2
and
6
)
More than 10 k
Ω
, –4 dBs
Video outputs
LINE OUT : phono jack
EURO-AV : 21-pin (Pin
!ª
) 1 Vp-p, 75
Ω
,
unbalanced, sync negative
Audio outputs
LINE OUT : phono jacks
–7.5 dBs at load
impedance 47 k
Ω
Output impedance : less than 10 k
Ω
EURO-AV : 21-pin (Pin
1
and
3
)
Output impedance : less than 1 k
Ω
–4 dBs with 10 k
Ω
load
2-1-6.
Adjusting Sequence
Make the electrical adjustment in the following sequence.
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TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
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7
3
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TEL 13942296513 QQ 376315150 892498299
