Sony HCD-XB88AVK / HCD-XB88K / LBT-XB88AVK / LBT-XB88KS Service Manual ▷ View online
– KEY CON SECTION –
– 25 –
HCD-XB88AVK/XB88K
J761
MIC LEVEL
RV760
MIC 1
3
1
J762
MIC 2
IC1403
6
7
1
2
9
8
5
3
4
9 10 11
Q1401
7 8 9
L OUT
A
MAIN
SECTION
• R CH : Same as Lch
• Signal path
: FM
: MIC
• Signal path
: FM
: MIC
(Page 21)
22
15
MIX
OUT
LPF1
IN
Rch
DATA
CLK
LATCH
K CON
L IN
DATA
CLOCK
STORBE
KEY CONTROL
IC1401
SWITCH
ECHO LEVEL
RV761
IC761
ECHO
LPF1
LPF2
IC760 (2/2)
ECHO AMP
IC760 (1/2)
MIC AMP
09
– 27 –
– 28 –
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.)
For schematic diagrams.
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
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.
•
¢
: internal component.
•
2
: nonflammable resistor.
•
5
: fusible resistor.
•
C
: panel designation.
For printed wiring boards.
Note:
•
X
: parts extracted from the component side.
•
p
: parts mounted on the conductor side.
•
®
: Through hole.
•
¢
: internal component.
•
b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
•
U
: B+ Line.
•
V
: B– Line.
•
H
: adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• 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 pro-
duction tolerances.
duction tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: FM
f
: AM
E
: PB (DECK A)
d
: PB (DECK B)
G
: REC (DECK B)
J
: CD
c
: digital out
I
: PHONO
Note: The components identified by mark
!
or dotted
line with mark
!
are critical for safety.
Replace only with part number specified.
• Indication of transistor
C
These are omitted
E
B
Q
C
These are omitted
E
B
IC103
@¶
MDP
1
2
3
4
5
WAVEFORMS
– CD SECTION –
– CD SECTION –
IC101
#£
RFO
IC101
2
FEI
IC101
$¶
TEI
IC103
^™
RFCK
6
IC103
^º
XPCK
7
IC103
&¢
WFCK
IC103
*ª
XTAI
8
500mV/DIV, 500nsec/DIV
1.3Vp-p
200mV/DIV, 1
µ
sec/DIV
0.5Vp-p
50mV/DIV, 1msec/DIV
0.2Vp-p
7.8
µ
sec
2.5Vp-p
230
µ
sec
5Vp-p
135
µ
sec
5Vp-p
135
µ
sec
5Vp-p
16.9344MHz
2.6Vp-p
1
IC601
!™
X-OUT
– DISPLAY SECTION –
1
IC602
@¢
XTAL
– MAIN SECTION (1/5) –
1
2
IC701
!£
XT2
IC701
0
X2
– MAIN SECTION (2/5) –
8MHz
4.8Vp-p
32.768kHz
5.2Vp-p
8MHz
4Vp-p
8MHz
5.5Vp-p
– 29 –
– 30 –
HCD-XB88AVK/XB88K
6-3. SCHEMATIC DIAGRAM – KEY CON SECTION –
• See page 81 for IC Block Diagrams.
6-4. PRINTED WIRING BOARD – KEY CON SECTION –
• See page 16 for Circuit Boards Location.
– 31 –
– 32 –
6-5. PRINTED WIRING BOARD – CD SECTION –
• See page 16 for Circuit Boards Location.
Ref. No.
Location
• Semiconductor
Location
IC101
C-5
IC102
B-5
IC103
C-6
Q101
C-3
(Page 36)
HCD-XB88AVK/XB88K
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