Read Sony NW-E8P Service Manual online
9
9
NW-E8P
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
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.
• Main board is six-layer printed board.
However, the patterns of layers 2 to 5 have not been
included in this diagrams.
included in this diagrams.
Lead layout of
conventional IC
conventional IC
CSP (chip size package)
*
Replacement of IC710 used in the set requires a spe-
cial tool.
cial tool.
• Lead Layouts
surface
z
Waveforms
1
VOLT/DIV : 0.5 V AC
TIME/DIV : 0.2 nsec
TIME/DIV : 0.2 nsec
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
•
: B+ Line.
• Power voltage is dc 1.5 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground in
playback mode.
no mark : PLAY
no mark : PLAY
∗
: 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.
• Signal path.
J
: DIGITAL
F
: ANALOG
• The voltage and waveform of CSP (chip size package)
cannot be measured, because its lead layout is different
form that of conventional IC.
form that of conventional IC.
*
Replacement of IC710 used in the set requires a spe-
cial tool.
cial tool.
2
VOLT/DIV : 1 V AC
TIME/DIV : 20
TIME/DIV : 20
µ
sec
VOLT/DIV : 1 V AC
TIME/DIV : 20
TIME/DIV : 20
µ
sec
3
Q902
D
IC901
5
EXT
VOLT/DIV :1 V AC
TIME/DIV : 5
TIME/DIV : 5
µ
sec
4
Q903
D
1Vp-p
22.5792MHz
2.8Vp-p
3Vp-p
2.2Vp-p
10
µ
sec
IC701
<zb/
XTO
— MAIN SECTION —
— POWER SECTION —
LCD check
Check the condition of indication by all display is lit or not.
Bx key : check start
Flash memory bad block check
OK
: FL OK The back light turns on
NG
: FL NG The back light turns on and off
AVLS key : select the destination
AR J (AEP, E).
Destination setting
Bx key : Enter the destination
OK
: WT OK The back light turns on
NG
: WT NG The back light turns on and off
Contrast adjustment
Display
t LC45
contrast value (Initial value : 45)
>, . key : Select the contrast value.
Bx key
: Enter the contrast value.
Normally, do not perform this adjustment.
Low voltage check
Low voltage detection check
OK
: LB OK The back light turns on
NG
: LB NG The back light turns on and off
Battery high voltage detection check
High DC detection check
OK
: HD OK The back light turns on
NG
: HD NG The back light turns on and off
Battery low voltage detection check
Low DC detection check
OK
: LD OK The back light turns on
NG
: LD NG The back light turns on and off
Description of each Mode ( : indication on display)
R
The regulated DC power supply voltage supplied to USB connector on checking each voltage value.
OK
NG
Low voltage check
0.9V
1.0V or more
High DC detection check
7.0V or more
6.0V or less
Low DC detection check
4.0V or less
5.0V or more
SECTION 5
DIAGRAMS
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