Sony CDX-C7000X Service Manual page 54

2. Change of Main and Display Boards
When performing service and inspection, check the part number
of the main and display boards.
2-1. Discrimination
-MAIN BOARD (COMPONENT SIDE)-
Main board part No.
Former:1-676-688-11
New :1-676-688-12
-DISPLAY BOARD (CONDUCTOR SIDE)-
2
Display board part No.
Former:1-676-689-11
New :1-676-689-12
2-2. Diagrams
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
for schamatic 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
specified.
• % : indicates tolerance.
f
• : internal component.
• C : panel designation.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• U : B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• 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
f
: AM
J
: CD
for printed wiring boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• a
: Through hole.
• b : Pattern from the side which enables seeing.
(The other layer's 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.
( ) : Refer to page of supplement-1.
< > : Refer to page of service manual.
W or less unless otherwise