Sony HCD-ECL77BT / HCD-ECL99BT Service Manual ▷ View online
HCD-ECL77BT/ECL99BT
HCD-ECL77BT/ECL99BT
17
17
SECTION 4
ELECTRICAL CHECK
CD SECTION
Note:
1. CD block is basically constructed to operate without adjustment.
2. Use YEDS-18 disc (Part No. 3-702-101-01) unless otherwise indicat-
1. CD block is basically constructed to operate without adjustment.
2. Use YEDS-18 disc (Part No. 3-702-101-01) unless otherwise indicat-
ed.
3. Use an oscilloscope with more than 10 M
impedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specifi ed value with the following check.
RF SIGNAL CHECK
+
–
–
MAIN board
TP27 (PUHRF)
TP31 (VREF1)
TP31 (VREF1)
oscilloscope
(DC range)
Procedure:
1. Connect the oscilloscope to TP27 (PUHRF) and TP31
1. Connect the oscilloscope to TP27 (PUHRF) and TP31
(VREF1) on the MAIN board.
2. Press the [
?
/
1
] button to turn the power on.
3. Press the [FUNCTION] button to turn the CD function.
4. Press the [
4. Press the [
Z
] button to open the disc tray.
5. Set the disc (YEDS-18) on the disc tray.
6. Press the [
6. Press the [
Z
] button to close the disc tray.
7. Press the [
u
] button to playback.
8. Confi rm that oscilloscope waveform is as shown in the fi gure
below. (eye pattern)
A good eye pattern means that the diamond shape (
) in the
center of the waveform can be clearly distinguished.
VOLT/DIV: 200 mV
TIME/DIV: 400 ns
TIME/DIV: 400 ns
level: 1.2 ± 0.2 Vp-p
Connection Location:
– MAIN Board (Conductor Side) –
TP31
(VREF1)
TP27
(PUHRF)
TP31
(VREF1)
TP27
(PUHRF)
HCD-ECL77BT/ECL99BT
HCD-ECL77BT/ECL99BT
18
18
SECTION 5
DIAGRAMS
5-1. BLOCK DIAGRAM (1/2)
HCD-ECL77BT/ECL99BT
HCD-ECL77BT/ECL99BT
19
19
5-2. BLOCK DIAGRAM (2/2)
HCD-ECL77BT/ECL99BT
HCD-ECL77BT/ECL99BT
20
20
For Schematic Diagrams.
Note:
• All capacitors are in
• All capacitors are in
μF unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
tantalums.
• All resistors are in
Ω and 1/4 W or less unless otherwise
specifi ed.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
For Printed Wiring Boards.
Note:
•
•
: Pattern from the side which enables seeing.
(The other layers’ patterns are not indicated.)
Caution:
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
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.
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
• Circuit Boards Location
Note:
The components identi-
fi
The components identi-
fi
ed by mark 0 or dotted
line with mark 0 are criti-
cal for safety.
Replace only with part
number specifi ed.
cal for safety.
Replace only with part
number specifi ed.
Note:
Les composants identifi és
par une marque 0 sont
critiques pour la sécurité.
Ne les remplacer que par
une pièce portant le nu-
méro spécifi é.
Les composants identifi és
par une marque 0 sont
critiques pour la sécurité.
Ne les remplacer que par
une pièce portant le nu-
méro spécifi é.
Note: When replacing the MAIN board, be sure replace both the
MAIN board and the NFC module at the same time.
The MAIN board or the NFC module cannot replace with single.
Note: When replacing the MAIN board, be sure replace both the
MAIN board and the NFC module at the same time.
The MAIN board or the NFC module cannot replace with single.
USB board
NFC module
POWER board
FRONT board
TUNER board
MAIN board
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