ICF-CD855V
1919
6-4. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
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 component.
• C : panel designation.
• A : B+ Line.
• H : adjustment for repair.
•Voltages and waveforms are dc with respect to ground
under no-signal conditions.
– CD Board –
[]: CD PLAY
– TUNER Board –
no mark : FM/TV (2 – 6 ch)
(): AM
[]: TV (7 – 13 ch)/WEATHER (1 – 7 ch)
– Other Boards –
no mark : FM
(): CD PLAY
•Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
•Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F : FM/TV (2 – 6 ch)
L : TV (7 – 13 ch)/WEATHER (1 – 7 ch)
f : AM
J : CD PLAY
Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• W : indicates side identified with part number.
•
f
: internal component.
• : 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
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
• Circuit Boards Location
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
SWITCH board
LCD board
SIDE board
MAIN board
RELAY board
KEY-B board
TUNER board
SNOOZE board
CD board
KEY-A board
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