11
11
ICD-CX50
ICD-CX50
SECTION 4
DIAGRAMS
Note on Schematic Diagrams:
• All capacitors are in
µ
F unless otherwise noted. (p: pF) 50 WV or
less are not indicated except for electrolytics and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise specified.
•
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 M
Ω
).
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.
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.)
*
Replacement of IC1001, 3951, 9301 and 9501 used in this set
requires a special tool.
• Lead layouts
Lead layout of
conventional IC
CSP (chip size package)
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.
surface
LCD board
JACK board
MAIN board
SWITCH board
MICROPHONE board
DETECTION SWITCH board
•
Circuit Boards Location
MEMO
