Service manual

HCD-EH10
1717
HCD-EH10
• Note for Printed Wiring Boards and Schematic Diagrams
• Indication of transistor
C
B
These are omitted.
E
Q
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
f
: internal component.
• : 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
(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.
B
These are omitted.
CE
Q
• Waveforms
– CD Board – – MAIN Board – – PANEL Board –
3
IC201 u; (RFACO)
(CD PLAY mode)
200 mV/DIV, 500 ns/DIV
0.5 to 1.3 Vp-p
22.8 µ s
3.3 Vp-p
1
IC201 1 (LRCK)
(CD PLAY mode)
1 V/DIV, 10 µ s/DIV
2
IC201 5 (BCK)
(CD PLAY mode)
1 V/DIV, 200 ns/DIV
472 ns
3.3 Vp-p
4
IC201 <z/, (XTAO)
(CD PLAY mode)
1 V/DIV, 20 ns/DIV
59.4 ns
2.3 Vp-p
qa
IC801 w; (XOUT)
(tuner mode)
500 mV/DIV, 5 µ s/DIV
13.3 µ s
1.6 Vp-p
qs
IC861 qf (XOUT)
(FM mode)
1 V/DIV, 100 ns/DIV
230 ns
4 Vp-p
ws
IC701 os (X1)
1 V/DIV, 100 ns/DIV
239 ns
3.1Vp-p
wa
IC701 qf (X1A)
1 V/DIV, 10 µ s/DIV
30.6 µ s
3.2 Vp-p
Ver. 1.4
Note on Schematic Diagram:
• 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
/
4
W or less unless otherwise
specified.
• f : internal component.
• C : panel designation.
• A : B+ Line.
• B : B– Line.
• H : Adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
– CD Board –
no mark : CD PLAY
– Other Section –
no mark : FM
[]: AM
(): CD PLAY
〈〈 〉〉 : TAPE PLAY
{ }: REC
• 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 PLAY
E : TAPE PLAY
j : REC
i : AUX IN
• Abbreviation
AUS: Australian model
CND : Canadian model
EE : East European model
KR : Korean model
RU : Russian model
SP : Singapore model
TW : Taiwan model
Note:
The components identi-
fied by mark 0 or dotted
line with mark 0 are criti-
cal for safety.
Replace only with part
number specified.
Note:
Les composants identifiés par
une marque 0 sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro
spécifié.
MAIN board
PT-AC board
AC-SW board
PANEL board
CD boar
d
• Circuit Boards Location