HBD-E770W
HBD-E770W
34
34
For Schematic Diagrams.
Note:
• All capacitors are in
μ
F 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
speci
fi
ed.
•
f
: internal component.
•
2
: non
fl
ammable resistor.
•
5
: fusible resistor.
•
C
: panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
•
A
: B+ Line.
•
B
: B– Line.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
– MB-134 board –
no mark : BD PLAY
*
: Impossible to measure
– Other board –
no mark : TUNER
*
: Impossible to measure
• Voltages are taken with VOM (Input impedance 10 M
Ω
).
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
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
:
AUDIO
E
:
VIDEO
J
: DISC PLAY
L
:
USB
d
:
LAN
f
:
TUNER
N
:
MIC
• The voltage and waveform of CSP (chip size package)
cannot be measured, becaise its lead layout is different
from that of conventional IC.
For Printed Wiring Boards.
Note:
•
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.)
• Indication of transistor.
C
B
These are omitted.
E
Q
B
These are omitted.
C E
Q
• Lead layouts
surface
CSP (Chip Size Package)
Lead layout of conventional IC
Caution:
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
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.
• MAIN and MB-134 boards are multi-layer printed board.
However, the patterns of intermediate-layers have not
been included in this diagrams.
• Circuit Boards Location
Note:
The components identi
fi
ed by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number speci
fi
ed.
AUDIO board
MB-134 board
R-USB board
F-USB board
MAIN board
REG board
TUNER (FM) (TU1)
INCLUDE board
POWER board
KEY board
P-KEY board
FL board
Note 2:
When the POWER board is replaced, spread the compound
referring to “NOTE OF REPLACING THE D913, D931,
IC901 AND IC921 ON THE POWER BOARD AND THE
COMPLETE POWER BOARD” on servicing notes (page 9).
Note 2:
When the POWER board is replaced, spread the compound
referring to “NOTE OF REPLACING THE D913, D931,
IC901 AND IC921 ON THE POWER BOARD AND THE
COMPLETE POWER BOARD” on servicing notes (page 9).
Note 1:
When the MAIN board is replaced, spread the compound
referring to “NOTE OF REPLACING THE IC3100 AND
IC3200 ON THE MAIN BOARD AND THE COMPLETE
MAIN BOARD” on servicing notes (page 8).
Note 1:
When the MAIN board is replaced, spread the compound
referring to “NOTE OF REPLACING THE IC3100 AND
IC3200 ON THE MAIN BOARD AND THE COMPLETE
MAIN BOARD” on servicing notes (page 8).
w w w . x i a o y u 1 6 3 . c o m
Q Q 3 7 6 3 1 5 1 5 0
9
9
2
8
9
4
2
9
8
T E L
1 3 9 4 2 2 9 6 5 1 3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
