23
23
HCD-XGV50
Note on Schematic Diagram:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
•
2
: nonflammable resistor.
•
5
: fusible resistor.
Note on Printed Wiring Boards:
•
X
: parts extracted from the component side.
•
: Pattern from the side which enables seeing.
(The other layers´ Patterns are not indicated.)
• Indication of transistor.
•
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.
BD board section and VIDEO board section.
no mark: CD PLAY
Other board section
no mark: TUNER (FM/AM)
( ): TAPE PLAY
< >: TAPE REC
[ ]: CD PLAY
• 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.
F
: TUNER (FM/AM)
E
: TAPE PLAY (DECK A)
d
: TAPE PLAY (DECK B)
G
: RECORD
J
: CD PLAY
g
: VIDEO
Note:
The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
B
These are omitted.
C
E
Q
B
These are omitted.
C
E
Q
C
B
These are omitted.
E
Q
r
WAVEFORMS
– MAIN BOARD –
– BD BOARD –
– PANEL FL BOARD –
1
IC501
qa
(XC-OUT)
2
IC501
qd
(X-OUT)
3
CN321
2
TAPE REC only
4
CN321
3
TAPE REC only
3.0Vp-p
32KHz
VOL/DIV : 1V AC
TIME/DIV : 10
µ
sec
VOL/DIV : 1V AC
TIME/DIV : 50nsec
VOL/DIV : 10V AC
TIME/DIV : 5
µ
sec
VOL/DIV : 10V AC
TIME/DIV : 5
µ
sec
2.0Vp-p
16MHz
24Vp-p
18
µ
sec
36Vp-p
18
µ
sec
1
IC601
is
(X OUT)
VOL/DIV : 1V AC
TIME/DIV : 0.2
µ
sec
4MHz
3.0Vp-p
– VIDEO BOARD –
1
IC103
qg
(RFAC)
2
IC103
qh
(FE)
3
IC103
qk
(TE)
VOL/DIV : 0.2V AC
TIME/DIV : 0.5
µ
sec
VOL/DIV : 0.2V AC
TIME/DIV : 0.2msec
VOL/DIV : 1V AC
TIME/DIV : 0.2msec
0.8 Vp-p
0.15 Vp-p
0.7 Vp-p
5
Q301
E
6
IC307
6
(VOUT)
1.0 Vp-p
H
0.8 Vp-p
H
0.8 Vp-p
H
1
IC505 (XTAO)
150
2
IC505 (CLKB)
207
3
IC505 (RFAC)
173
2.5 Vp-p
33.8688 MHz
2.8 Vp-p
27 MHz
VOL/DIV : 1V AC
TIME/DIV : 20nsec
VOL/DIV : 1V AC
TIME/DIV : 20nsec
VOL/DIV : 0.5V AC
TIME/DIV : 20
µ
sec
VOL/DIV : 0.5V AC
TIME/DIV : 20
µ
sec
4
IC505
6
(EPSIG)
VOL/DIV : 0.5V AC
TIME/DIV : 20
µ
sec
VOL/DIV : 0.2V AC
TIME/DIV : 0.5
µ
sec
0.8 Vp-p
Summary of Contents for HCD-XGV50
Page 79: ...79 HCD XGV50 MEMO ...
