Circuit Boards Location - Sony CDX-GT800D Service Manual

CDX-GT800D/GT805DX

4-4. CIRCUIT BOARDS LOCATION

SENSOR board
DISPLAY board
BASE PANEL board
• Waveforms
— SERVO Board —
(CD PLAY)
1 4
IC2 5 (FEI) IC2 ia (RFI)
0 V
Approx. 100 mVp-p
50 mV/DIV, 5 msec/DIV
0.5 V/DIV, 0.5 µ sec/DIV
2
5
IC2 6 (TEI) IC2 of (FNI2), og (FNI1)
0 V
Approx. 400 mVp-p
200 mV/DIV, 5 msec/DIV 0.5 V/DIV, 0.5 µ sec/DIV
3 6
IC2 wd (XI) IC2 oh (FPI2), oj (FPI1)
0.6 Vp-p
16.9344 MHz
0.2 V/DIV, 0.2 µ sec/DIV 0.5 V/DIV, 0.5 µ sec/DIV
CDX-GT800D/GT805DX
SERVO board
tuner unit
(TUX501)
MAIN board
SUB PANEL board
7
IC3 ia (X1)
Approx.
1Vp-p
1.1 Vp-p
12 MHz
0.5 V/DIV, 0.2 µ sec/DIV
1.5 Vp-p
— DISPLAY Board —
1
IC901 qa (XOUT)
3.0 Vp-p
1.5 Vp-p
6.747 kHz
1 V/div, 50 nsec/div
22
• NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC 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 schematic diagrams.
Note:
• 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
4
specified.
• 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.
• A : B+ Line.
• B : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• CD mechanism section (1/2), (2/2)
no mark : CD PLAY
• Main (1/4), (2/4), (3/4), (4/4) and Display sections
no mark : FM/MW/LW
< > : CD PLAY
∗ : Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J
: CD PLAY
F
: FM
f
: MW/LW
L : BUS AUDIO
— MAIN Board —
1 3
IC551 0 (XT0) IC650 4 (OUT)
2.1 Vp-p
8.664 MHz
3 µ sec
1 V/DIV, 50 nsec/DIV
5 V/div, 1 µ sec/div
2 4
IC801 ed (MCLKI) IC303 9 (XCOUT)
3.2 Vp-p
32.768 kHz
11.2896 MHz
1 V/div, 50 nsec/div 1 V/div, 10 µ sec/div
22
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
• : Through hole.
a
• : 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 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.
C
Q
These are omitted
B E
B E C
These are omitted
E C B
These are omitted
• Abbreviation
CH : Chinese model.
5
IC303 qa (XOUT)
10 Vp-p 3.6 Vp-p
6 MHz
1 V/DIV, 50 nsec/DIV
6
IC620 4 (OUT)
11 Vp-p
2.7 Vp-p
2.97 µ sec
5 V/div, 1 µ sec/div