Diagrams - Sony ICD-CX50 Service Manual

Note on Schematic Diagrams:
• All capacitors are in µF unless otherwise noted. (p: pF) 50 WV or
less are not indicated except for electrolytics and tantalums.
• All resistors are in Ω and
1
/ W or less unless otherwise specified.
4
• f : internal tolerance.
• C : panel designation.
• A : B+ Line.
• Power voltage is dc 3.7V 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
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production toler-
ances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production toler-
ances.
• Circled numbers refer to waveforms.
• Signal path.
F
: PB
L : REC
Replacement of IC1001, 3951, 9301 and 9501 used in this set re-
*
quires a special tool.
• The voltage and waveform of CSP (chip size package) cannot be
measured, because its lead layout is different from that of conven-
tional IC.
• Circuit Boards Location
LCD board
SWITCH board
ICD-CX50
SECTION 4

DIAGRAMS

Note on Printed Wiring Boards:
• Y : parts extracted from the conductor 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
(Side B) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.
Replacement of IC1001, 3951, 9301 and 9501 used in this set
*
requires a special tool.
• Lead layouts
Lead layout of
conventional IC
MICROPHONE board
DETECTION SWITCH board
JACK board
MAIN board
MEMO
surface
CSP (chip size package)
11 11
ICD-CX50