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25
25
7-5.
NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS
(In addition to this, the necessary note is printed in each block)
Note on Schematic Diagram:
• 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.
•
5
: fusible resistor.
•
C
: panel designation.
•
U
: B+ Line.
•
V
: B– Line.
•
H
: adjustment for repair.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
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.
E
: TAPE PLAYBACK (DECK A)
d
: TAPE PLAYBACK (DECK B)
G
: RECORD
J
: CD PLAY (AUDIO)
L
: CD PLAY (VIDEO)
c
: DIGITAL OUT
• Abbreviation
CH
: Chinese model
HK
: Hong Kong model
MY
: Malaysia model
SP
: Singapore model
TH
: Thai model
Note on Printed Wiring Board:
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
x
: parts mounted on the conductor side.
•
b
: 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
(Side B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Side A)
the parts face are indicated.
• Indication of transistor.
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
B
These are omitted.
C
E
Q
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
• Circuit Boards Location
CLAMP MOTOR board
BD board
IN SW board
INT/COUNT SW board
MAIN board
CONNECTOR board
LOAD MOTOR board
POWER board
AUDIO board
OUT SW board
PANEL TC-A board
PANEL TC-B board
LEAF SW board
PANEL board
SENSOR board
SENSOR 2 board
VIDEO board
Содержание HTC-NX300
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