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21
21
HCD-S400
• Indication of transistor
C E
B
These are omitted
Q
C
E
B
These are omitted
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. pF: µµF
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.
For printed wiring boards.
Note:
•
X
: parts extracted from the component side.
•
a
: Through hole.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
•
A
: B+ Line.
•
B
: B– Line.
•
H
: adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
RF-240 board section
no mark: DVD STOP
< >: DVD PLAY
* :
Inpossible to measure
Other board section
no mark: FM
< >: DVD PLAY
*
:
Inpossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
WAVEFORMS
– DVD BOARD –
– FP-1030 BOARD –
– RF-240 BOARD –
– I/O BOARD –
Note:
The components identified by mark
!
or dotted
line with mark
!
are critical for safety.
Replace only with part number specified.
Caution:
Pattern face side:
Parts on the pattern face side seen from
(Conductor B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component A)
the parts face are indicated.
– AMP BOARD –
– DDCOM-1030 BOARD –
SECTION 6
DIAGRAMS
6-1. CIRCUIT BOARD LOCATION
PW-1030 board
FU-1030 board
HP-1030 board
FP-1030 board
Loading board
RF-240 board
DVD board
TUNER UNIT
I/O board
SW (B)-1030 board
SW (A)-1030 board
AMP board
DDCON-1030 board
RR-1030 board
Switching Regulator
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
no mark : STOP
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
J
: CD
c
: DVD
g
: VIDEO
Содержание HCD-S400
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