Sony KV-28FQ70B Service Manual ▷ View online
- 3 -
CAUTION
Lead Free Soldered Boards
The circuit boards listed below [Table 1] used in these models
may have been processed using Lead Free Solder. The boards are
identified by the LF logo located close to the board designation
e.g. F1, H1 etc [ see examples ]. The servicing of these boards
requires special precautions to be taken as outlined below.
may have been processed using Lead Free Solder. The boards are
identified by the LF logo located close to the board designation
e.g. F1, H1 etc [ see examples ]. The servicing of these boards
requires special precautions to be taken as outlined below.
Table 1
example 1
example 2
It is strongly recommended to use Lead Free Solder material in order to guarantee optimal quality of new solder joints. Lead Free Solder is
available under the following part numbers :
available under the following part numbers :
Due to the higher melting point of Lead Free Solder the soldering iron tip temperature needs to be set to 370 degrees centigrade. This
requires soldering equipment capable of accurate temperature control coupled with a good heat recovery characteristics.
requires soldering equipment capable of accurate temperature control coupled with a good heat recovery characteristics.
For more information on the use of Lead Free Solder, please refer to http://www.sony-training.com
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- 5 -
WARNING (UK Models only)
The flexible mains lead is supplied connected to a B.S. 1363 fused
plug having a fuse of 5 AMP rating. Should the fuse need to be
replaced, use a 5 AMP FUSE approved by ASTA to BS 1362, ie one
that carries the
plug having a fuse of 5 AMP rating. Should the fuse need to be
replaced, use a 5 AMP FUSE approved by ASTA to BS 1362, ie one
that carries the
ASA
T
mark.
IF THE PLUG SUPPLIED WITH THIS APPLIANCE IS NOT SUIT-
ABLE FOR THE OUTLET SOCKETS IN YOUR HOME, IT SHOULD
BE CUT OFF AND AN APPROPRIATE PLUG FITTED. THE PLUG
SEVERED FROM THE MAINS LEAD MUST BE DESTROYED AS A
PLUG WITH BARED WIRES IS DANGEROUS IF ENGAGED IN A
LIVE SOCKET.
ABLE FOR THE OUTLET SOCKETS IN YOUR HOME, IT SHOULD
BE CUT OFF AND AN APPROPRIATE PLUG FITTED. THE PLUG
SEVERED FROM THE MAINS LEAD MUST BE DESTROYED AS A
PLUG WITH BARED WIRES IS DANGEROUS IF ENGAGED IN A
LIVE SOCKET.
When an alternative type of plug is used, it should be fitted with a
5 AMP FUSE, otherwise the circuit should be protected by a 5 AMP
FUSE at the distribution board.
5 AMP FUSE, otherwise the circuit should be protected by a 5 AMP
FUSE at the distribution board.
How to replace the fuse.
Open the fuse compartment with
a screwdriver blade and replace
the fuse.
Open the fuse compartment with
a screwdriver blade and replace
the fuse.
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- 6 -
Connected
Not Connected (open) * at 20Hz - 20kHz
Pin No
1
2
4
Signal
Signal level
1
Audio output B
(right)
(right)
Standard level : 0.5V rms
Output impedence : Less than 1kohm*
Output impedence : Less than 1kohm*
2
Audio input B
(right)
(right)
Standard level : 0.5V rms
Output impedence : More than 10kohm*
Output impedence : More than 10kohm*
3
Audio output A
(left)
(left)
Standard level : 0.5V rms
Output impedence : Less than 1kohm*
Output impedence : Less than 1kohm*
4
Ground (audio)
5
Ground (blue)
6
Audio input A
(left)
(left)
Standard level : 0.5V rms
Output impedence : More than 10kohm*
Output impedence : More than 10kohm*
7
Blue input
0.7 +/- 3dB, 75 ohms positive
8
Function select
(AV control)
(AV control)
High state (9.5-12V) : Part mode
Low state (0-2V) : TV mode
Input impedence : More than 10K ohms
Input capacitance : Less than 2nF
Low state (0-2V) : TV mode
Input impedence : More than 10K ohms
Input capacitance : Less than 2nF
9
Ground (green)
10
Open
11
Green
Green signal : 0.7 +/- 3dB, 75 ohms,
positive
positive
12
Open
13
Ground (red)
14
Ground (blanking)
15
_
_
Red input
0.7 +/- 3dB, 75 ohms, positive
_
(S signal Chroma
input)
input)
0.3 +/- 3dB, 75 ohms, positive
16
Blanking input
(Ys signal)
(Ys signal)
High state (1-3V) Low state (0-0.4V)
Input impedence : 75 ohms
Input impedence : 75 ohms
17
Ground (video
output)
output)
18
Ground (video
input)
input)
19
Video output
1V +/- 3dB, 75ohms, positive sync 0.3V
(-3+10dB)
(-3+10dB)
20
_
_
Video input
1V +/- 3dB, 75ohms, positive sync 0.3V
(-3+10dB)
(-3+10dB)
_
Video input
Y (S signal)
Y (S signal)
1V +/- 3dB, 75ohms, positive sync 0.3V
(-3+10dB)
(-3+10dB)
21
Common ground
(plug, shield)
(plug, shield)
21 pin connector
19
17
15
13
11
9
7
5
3
1
20
18
16
14
12
10
8
6
4
2
21
Rear Connection Panel
Front Connection Panel
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