Sony SLV-286EE - Specified;O Level and Impedance; Servo;Video System Adjustments -Ccrssott Tt

2-1-5. Specified I/O Level and Impedance
input/output terminal
Video input LINEIN : phono jack
1 Vp-p, 75 Q , unbalanced, sync negative
Audio input LINEIN : phono jack
47kQ , — 7.5 dBs (0 dBs = 0.775 Vrms)
More than 10kQ , — 4dBs
LINE OUT : phono jack
1 Vp-p, 75 Q , unbalanced, sync negative
LINE OUT : phono jack
— 7.5 dBs at load impedance 47 kQ
Output impedance : less than 10kQ
Video output
Audio output
2-1-6. Adjusting Sequence
Make the electrical adjustment in the following sequence.
Checking power supply
Servo/Video system adjustment
Audio system adjustment
2-2. POWER SUPPLY CHECK (MA-203 BOARD)
Measuring Instrument Digital voltmater
Pin © of 1C121
12.0 + 0.3 Vde
Measurement Point
Specified Value
MTR 12 V check
Measurement Point
Cathode of D121
12.4 + 0.5 Vde
Specified Value
SW 5 V check
Measurement Point
Enter of Q123
Specified Value 5.0 + 0.2 Vde
DS V check
Measurement Point
Cathode of D502
§.1+0.2V
Specified Value
DC 40 V check
Measurement Point C187 @ side
44.0 + 1.5 V Vde
Specified Value
Checking Method:
1) Confirm that each voltage meets its specified value.
2-3. SERVO/VIDEO SYSTEM ADJUSTMENTS
e NOTE ON REPAIRING RV-33 BOARD
[Servicing Jig]
MA-203 © RV-33 Extension cable.
@ 14 pins (J-6090-046-A) CN801 <— CNOO1
® 20 pins (J-6090-045-A) CN802 < CNO02
@ There are two types of the connectors between MA-203 and
RV-33 boards according to the manufacturing companies
(TAIKO or MOLEX). They are not interchangeable.
@ Servicing jigs are for common use.
When using it, please be sure to confirm the form of
connectors.
© MOLEX parts © TAIKO parts
(two claws) (three claws)
iy
2)
yf,
i)
{ {_
(Female) (I (Female) [—
(Male) (Male)
OLEX
(Female)
TAIKO
(Male)
MOLEX
TAIKO
(Female)
(Male)
@: Pin @side
FFC cable
Fig. 7-2-3
e@ EXTENSION CABLE USING LOCATION
(See page 7-1 for details of extension cables.)
p
(J-6090-043-A)
14 pins
(J-6090-044-A)
Fig. 7-2-4.
7-2