Sharp SM-SX1 (serv.man2) Service Manual ▷ View online
SM-SX1H
– 9 –
Output
Connector
-22V Side
-22V Side
+22V Side
+22V Side
semifixed VOL
semifixed VOL
G
A
From Main PWB
Output
Connector
1-bit PWB adjusting method
Connect as shown Fig. 9-2.
AC IN 110-120, 220-240, 230V
AC IN 110-120, 220-240, 230V
AC POWER SUPPLY
UNIT
Digital Multimeter
Figure 9-2
AC/CD switching power supply, Output voltage adjustment
Figure 9-1
Check that the AC/DC output voltage is
±
22V
±
0.15V at the
Â
connector. (If different, adjust the voltage using the semifixed
VOL as described above.)
VOL as described above.)
[Simplified offset voltage adjustment]
1. It is fitled to the mechanical center of VRA1, VRA2, VRA3, and VRA4.(FIg. 10-1)
2. Connect the digital multimeter to the terminals of the speaker, and adjust the voltage between + and – of each terminal to 0
2. Connect the digital multimeter to the terminals of the speaker, and adjust the voltage between + and – of each terminal to 0
±
10 mVolt with VRA1 (L-ch) or VRA2 (R-ch). (Fig.9-3)
DIGITAL OUT
(OPTICAL)
RIGHT
+
-
RATED IMPEDANCE : 8
SPEAKERS
LEFT
+
-
R-ch 8
Ω
SP Terminal L-ch
Figure 9-3
SM-SX1H
– 10 –
(1 BIT PWB)
Figure 10-1
WIRING PROCESS DIAGRAM
Figure 10-2
Approx. 60mm
B1
side
B1
side
Wind once.
Connector
side
Connector
side
Tie with nylon band.
Wind the lead wire around the core
once. Mount the core and lock it.
Then, tie them together nylon band.
once. Mount the core and lock it.
Then, tie them together nylon band.
nylon band.
Core mounting position
Wind the 5P lead wire, as
shown, once around each
core . Mount the cores and
lock them. Then, insert the
connectors.
shown, once around each
core . Mount the cores and
lock them. Then, insert the
connectors.
Place the core around the
position shown above.
position shown above.
After processing the core, insert the 12P connector from
the terminal PWB.
(Microcomputer PWB CNP904) (See Fig.-A.)
the terminal PWB.
(Microcomputer PWB CNP904) (See Fig.-A.)
F i g - B
3 0 mm
3 0 mm
5P
Pull out the lead wires from above.
Press the lead wires wound around
the core toward the SP relay PWB.
Press the core to the terminal
board with the core stood.
board with the core stood.
core
core
F i g - A
Place the core near the
connector.
connector.
Twist the 12P lead wire and wind it
around core once (near the connector).
Mount the core and lock it. Then, insert
the connectors.
around core once (near the connector).
Mount the core and lock it. Then, insert
the connectors.
Fix the core to the aperture
using nylon band.
(Head inside)
using nylon band.
(Head inside)
After fixing the core, insert the 5P connector from
the digital PWB. (See Fig.-B.)
the digital PWB. (See Fig.-B.)
Insert the 2P connector
from the inlet.
from the inlet.
Detail drawing of winding lead wire
around the core
around the core
core
SM-SX1H
– 11 –
Push the core of the SP lead wires into the
space between the shield case and the
sperker relay PWB. (The direction of the
core can be either vertical or horizontal.)
space between the shield case and the
sperker relay PWB. (The direction of the
core can be either vertical or horizontal.)
Push in the core.
Push in the core.
Mount the core to the 11P lead wire.
70 5
5P
4PB 1
5P
4P
6P
4P
3P
3P
2P
2P
After passing through the cores, insert the
terminals in the 4P and 6P housings.
terminals in the 4P and 6P housings.
Core
After winding the lead wire around the core,
insert the 7P connector from the SP relay
PWB in the terminal PWB. (Perform the
above by placing the core around the place
shown). Be careful not to touch the screw.
insert the 7P connector from the SP relay
PWB in the terminal PWB. (Perform the
above by placing the core around the place
shown). Be careful not to touch the screw.
Figure 11-1
WIRING OF PRIMARILY SUPPLY LEADS (FOR U.K. ONLY)
If any one of the bands shown in Fig. 11-2 is removed some reason, be sure replace it to the original position and same appearance
as before.
as before.
Pull out the lead wires from above.
Press the lead wires wound around
the core toward the speaker relay PWB.
the core toward the speaker relay PWB.
Press the core to the terminal board with the core stood.
Insert the 2P connector
from the inlet.
from the inlet.
Tie with nylon band.
Tie with nylon band.
AC INPUT
FILTER PWB
FILTER PWB
POWER PWB
Figure 11-2
SM-SX1H
– 12 –
DIGITAL SIGNAL
ANALOG SIGNAL
RELAY CONTROL
PROTECT
3
13
13
3
7
8
7
8
10
1
6
44
40
37
~
~
3
1
~
5
1
3
~
38
39
42
39
42
35
27 33
1 13
3
8
5
11
11
1
9 5
10
12
1
12
11
15
17
~
18
20
24
25
26
38
1 2 3 29 26 33
35 41
43
~
~
~
1
3
~
11
17
~
5
13
J101
LINE2
LINE
OUT
OUT
RLY101
Q101
RLY102
Q102
RLY103
Q103
DIGITAL/ANALOG
CHANGE
RLY802
Q803
VOL301
MAIN
VOLUME
DIGITAL/ANALOG
CHANGE
RLY301,
RLY302
Q301
Q302
Q302
A
Q
IC
IC
A
B
IC102
INVERTER
74HC153F
IC103
BUFFER
AMP.
74HCT04F
1BIT TERMINAL
RX101
DIGITAL
IN-2
DIGITAL
IN-2
TX101
DIGITAL OUT
DIGITAL OUT
SOC101
IC800
DIGITAL
INTERFACE
RECEIVER
YM3436D
IC801
SAMPLING
RATE
CONVERTER
SM5844AF
IC803
1bit
CONVERSION
TDA1307
IC806
CONTROL
74ACT00F
IC811
TC7W74F
IC802
TC7W04F
IC807
SELECT
74ACT00F
IC804
CLOCK
SELECT
74ACT00F
IC805,IC809
WAVEFORM
RECTIFICATION
74HC74AF
RLY800
RLY801
RLY801
Q801
Q802
Q803
Q802
Q803
IC907
SYSTEM
MICROCOMPUTER
IX2845AF
SW900~904
FUNCTION
IC903~
IC905
LED
DRIVER
BU2114F
LED900~904
LED905~907
INITIALIZATION
SACD
LINE1
J102
J103
DIGITAL
IN-1
DIGITAL
IN-1
Figure 12 BLOCK DIAGRAM (1/2)
Click on the first or last page to see other SM-SX1 (serv.man2) service manuals if exist.