Sony CDX-GT740UI / CDX-GT747UI / CDX-GT790UI Service Manual ▷ View online
CDX-GT740UI/GT747UI/GT790UI
13
3-9. SLED MOTOR ASSY
3
sled motor assy
sled motor assy
1
spring
spring
stand
stand
turn table
2
three serration screws
(M
2
u 3)
three serration screws
(M 2
(M 2
u 3)
Note: Place the stand with care not to touch the turn table.
Note:
Never remove these parts since they were adjusted.
Never remove these parts since they were adjusted.
Note for Assembly
Note: Take care to prevent the chassis from being bent
when tightening the three machine screws.
bearing (R)
bearing (F)
CDX-GT740UI/GT747UI/GT790UI
14
3-10. OPTICAL PICK-UP SECTION
3-11. OPTICAL PICK-UP
1
2
optical pick-up section
Note: Be careful not to touch the lens and hologram
terminal when removing the optical pick-up section.
1
tapping screw
(P
1.4)
2
leaf spring (OPS)
3
rack
5
optical pick-up
4
lead screw assy
CDX-GT740UI/GT747UI/GT790UI
15
MEMO
CDX-GT740UI/GT747UI/GT790UI
16
SECTION 4
DIAGRAMS
• A : B+ Line.
• B : B– Line.
• Voltages and waveforms are dc with respect to ground
• B : B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• no mark : FM
( ) : AM or MW
< > : CD PLAY
• Voltages are taken with VOM (Input impedance 10 M
( ) : AM or MW
< > : CD PLAY
• Voltages are taken with VOM (Input impedance 10 M
).
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
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J :
J :
CD
F :
FM
f
: AM or MW
L :
AUX
c :
USB
g : BUS AUDIO
• Abbreviation
RU
RU
: Russian model
For schematic diagrams:
Note:
Note:
• All capacitors are in μF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
and
1
/
4
W or less unless otherwise
specifi ed.
• f : internal component.
• C : panel designation.
• C : panel designation.
For Printed Wiring Boards:
Note:
• X : Parts extracted from the component side.
• Y : parts extracted from the conductor side.
• a :
• X : Parts extracted from the component side.
• Y : parts extracted from the conductor side.
• a :
Through
hole.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A)
Pattern face side:
(SIDE B)
Parts face side:
(SIDE A)
Parts on the pattern face side seen
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in
each block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in
each block.)
• Abbreviation
RU
RU
: Russian model
• Waveforms
– MAIN Board –
Note: The components identifi ed by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specifi ed.
0.05 Vp-p
4 MHz
2.8 Vp-p
32.768 kHz
0.05 V/DIV, 50 nsec/DIV
1 V/DIV, 20 ȝsec/DIV
1
IC1
qh (XTAL1)
2
IC501
qa (X_IN)
3.6 Vp-p
7.92 MHz
1 V/DIV, 50 nsec/DIV
3
IC501
oa (OSC_IN)
1.2 Vp-p
8.664 MHz
0.5 V/DIV, 50 nsec/DIV
4
IC50
9 (XTI)
(AEP,UK,RU model)
– KEY Board –
1.4 Vp-p
8 MHz
0.5 V/DIV, 50 nsec/DIV
IC901 RB (XOUT)
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