Read Sony ICD-B500 Service Manual online
10
10
ICD-B500
ICD-B500
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.)
Common Note on Schematic Diagrams:
• All capacitors are in µF unless otherwise noted. (p: pF)
• All capacitors are in µF unless otherwise noted. (p: pF)
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.
• A : B+ Line.
• Power voltage is dc 3 V and fed with regulated dc power
• Power voltage is dc 3 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : PB
(
) : REC
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
E
: PB
a
: REC
Common Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
z
: Through hole.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
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.
• Waveforms
— MAIN Board —
— MAIN Board —
1
IC703 qj (OSC1)
0.5 V/DIV, 0.1
µ
sec/DIV
2
IC703 w; (XI)
0.5 V/DIV, 20
µ
sec/DIV
32.768 kHz
1.1 Vp-p
8 MHz
1.3 Vp-p
• IC BLOCK DIAGRAMS
IC102 MM3111AWLE
1
BIAS
3
4
2
8
6
5
7
SHUTDOWN
BYPASS
+IN
-IN
VO2
GND
VDD
VO1
IC506 XC9105D091MR
5
BUFFER
DRIVER
DRIVER
PHASE
COMPENSATION
PHASE
COMPARATOR
RAMP WAVE
GENERATOR,
OSC
4
CURRENT
RIPPLE DETED
AND FB
VREF WITH
SOFT START,
CE
PWM/PFM
CONTROLER
ERROR
AMP
1
2
3
FB
VDD
CE
EXT
GND
Ref. No.
Location
(D505)
H-6
D701
E-12
D702
E-12
IC101
C-9
IC102
D-11
(IC501)
J-6
(IC502)
G-6
(IC503)
I-6
(IC504)
G-3
(IC506)
H-6
(IC701)
I-7
(IC702)
G-10
(IC703)
I-10
(Q101)
G-11
(Q102)
F-12
Q106
B-10
(Q506)
H-5
(Q507)
I-4
(Q508)
I-4
(Q702)
H-10
Q703
C-8
• Semiconductor
Location
(MAIN Section)
(MAIN Section)
( ): SIDE B
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