Sony MDX-C7900 / MDX-C7900R Service Manual ▷ View online
MDX-C7900/C7900R
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5-6.
SCHEMATIC DIAGRAM – MECHANISM DECK Section –
•
See page 39 for IC Block Diagrams and page 45 for Waveforms.
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
U
: B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : MD
no mark : MD
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
E
: MD
Note:
The components identi-
fied by mark
The components identi-
fied by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number specified.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
0
sont critiques
pour la sécurité.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
Ne les remplacer que par une
piéce por tant le numéro
spécifié.
MDX-C7900/C7900R
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5-7.
SCHEMATIC DIAGRAM – MAIN Section –
•
See page 3 for Type A/Type B Discrimination.
•
See page 42 for IC Block Diagrams and page 45 for Waveforms.
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
C
: panel designation.
•
U
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
no mark : FM
(
) : AM
〈〈
〉〉
: LW
<
> : MD
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: FM
f
: AM
E
: MD
L
: BUS AUDIO IN
• Abbreviation
CND : Canadian
G
G
: German
MDX-C7900/C7900R
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– 42 –
5-8.
PRINTED WIRING BOARD – MAIN Section –
•
See page 3 for Type A/Type B Discrimination.
D3
F-11
D5
H-12
D200
J-5
D201
D-7
D202
D-6
D302
B-12
D303
G-8
D500
B-5
D501
B-5
D504
B-7
D505
B-6
D506
B-7
D507
B-8
D508
B-8
D600
B-2
D601
B-2
D602
C-2
D603
D-3
D701
K-7
D702
K-10
D800
F-3
D801
E-4
D802
I-2
D803
I-2
D900
B-1
D901
J-6
D902
K-10
D903
K-10
D904
K-9
D907
J-7
D909
J-11
D910
J-11
D911
J-11
D912
J-11
D913
D-4
D914
G-1
IC100
E-12
IC102
I-12
IC103
H-12
IC200
F-3
IC202
G-5
IC203
H-5
IC204
E-4
IC250
J-6
IC300
E-8
IC600
D-2
IC700
I-8
IC801
J-2
IC802
J-2
Q1
D-11
Q2
C-11
Q4
F-13
Q5
H-12
Q6
C-13
Q50
I-13
Q51
J-13
Q100
H-13
Q102
G-12
Q103
H-12
Q250
J-5
Q252
D-7
Q253
D-6
Q254
C-6
Q255
D-5
Q300
C-7
Q301
C-7
Q302
C-7
Q303
C-7
Q400
C-8
Q401
C-9
Q402
B-8
Q403
B-9
Q500
B-6
Q600
D-3
Q603
D-2
Q700
G-7
Q900
D-4
Q901
K-7
Q902
K-6
Q905
K-10
Q906
J-7
Q991
G-7
Q993
G-5
Ref. No. Location
Ref. No. Location
• Semiconductor Location
(Component Side)
D1
C-2
D4
C-4
D300
B-5
D301
B-3
D502
B-12
D503
B-8
D509
B-7
D510
B-7
D604
C-13
D700
H-7
D905
K-5
D906
K-5
D908
K-7
D916
K-12
IC201
E-10
IC500
A-7
IC800
E-13
IC900
F-13
Q101
H-4
Q251
I-9
Q601
D-13
Q701
K-9
Q903
H-13
Q904
H-12
Q992
G-5
• Semiconductor
Location
(Conductor Side)
(Conductor Side)
Ref. No. Location
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
•
f
: internal component.
• b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• Abbreviation
CND : Canadian
Caution:
Pattern face side:
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.
MDX-C7900/C7900R
– 43 –
– 44 –
– 45 –
– 46 –
5-9.
PRINTED WIRING BOARD – PANEL Section –
• Semiconductor
Location
(Conductor Side)
(Conductor Side)
Ref. No. Location
D802
B-12
D803
B-12
D804
B-12
D806
B-6
D807
B-6
D808
C-12
D819
B-2
Q801
B-5
Q802
B-5
Q803
B-5
Q804
B-5
Q805
B-2
• Semiconductor
Location
(Component Side)
(Component Side)
Ref. No. Location
D811
C-3
D812
B-3
D813
A-4
D814
A-2
D815
B-1
D816
C-2
D817
A-11
IC801
B-8
Q806
C-4
Q807
B-1
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
• b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
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.
5-10.
SCHEMATIC DIAGRAM – PANEL Section –
•
See page 46 for Waveform.
Note on Schematic Diagram:
• All capacitors are in
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
C
: panel designation.
•
U
: B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM (AMBER Illumination)
(
no mark : FM (AMBER Illumination)
(
) : FM (GREEN Illumination)
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
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