Read Sony MDS-JB980 Service Manual online
41
41
MDS-JB980
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
C
: panel designation.
For printed wiring boards.
Note:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
a
: Through hole.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
•
A
: B+ Line.
•
B
: B– Line.
•
H
: adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : STOP
(
)
: PLAY
<
>
: REC
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
E
: PB
j
: REC
l
: REC (DIGITAL IN)
p
: PLAY (DIGITAL OUT)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)
Pattern face side: Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side:
Parts on the parts face side seen from the
(Side A)
parts face are indicated.
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
B
These are omitted.
C
E
Note:
The components identified by mark
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
6-4. CIRCUIT BOARDS LOCATION
– USB Board –
IC201
rj
(XTAL)
1
3.7Vp-p
12MHz
– MAIN Board –
IC1
qd
(XOUT)
1
IC500
8
(XTO)
2
3.0Vp-p
10 MHz
4.5Vp-p
11.2896 MHz
MAIN board
USB board
SW board
DISPLAY board
BD board
PSW board
KEY board
HP board
PT board
• Waveforms
– BD Board –
– BD Board –
IC101
wh
(TE) Play Mode
1
IC201
w;
(OSCO)
5
IC101
ef
(FE) Play Mode
2
IC201
ef
(LRCK)
6
3
7
IC101
ek
(RF)
IC201
eg
(XBCK)
IC803
1
(XIN)
4
1.5Vp-p
On track jumping
0.1Vp-p
1.2Vp-p
2Vp-p
11.2896 MHz
2.5Vp-p
90.3 MHz
3.2Vp-p
23
µ
sec
0.36
µ
sec
3.2Vp-p
Click on the first or last page to see other MDS-JB980 service manuals if exist.