Sharp SD-NX10 (serv.man10) Service Manual ▷ View online
SD-NX10H
– 84 –
Yes
• Normal playback
Is initialization performed normally when high reflection disc is
played back ?
played back ?
Does disc rotate normally?
No
No
Check IC1201.
Is lead-in switch turned on in the TEST mode when the pickup is on
the innermost periphery ? (Is the pin 63 of IC1401 on L level ?)
the innermost periphery ? (Is the pin 63 of IC1401 on L level ?)
No
No
Check SW1936, soldered joints of mechanism switch PWB, and
periphery of pin 3 of CW1931.
periphery of pin 3 of CW1931.
Yes
When it has been confirmed that EEPROM value is normal in the TEST mode
Does the playback time display advance ?
Check the position as stated in item "Lead-in switch position
measurement mode".
measurement mode".
• Record and playback operations
Insert the low reflection disc, and after verifying the audio output in the normal mode playback set the record/playback TEST mode.
Is recording performed after displaying TEST REC ?
Yes
No
Check whether the disc is record-prohibited.
Is RF waveform output to the pin 1 of IC1201 or TP1201
when playback is performed after recording ?
when playback is performed after recording ?
No
Does RF pattern appear on the pin 50 of IC1201 during
recording ?
recording ?
Yes
No
No
Check for IC1201 soldering failure.
Yes
Is output waveform given to the pins 19 and 21 of CN1501 in
AUX input record in the Normal mode ?
AUX input record in the Normal mode ?
Is input waveform given to the pins 3 and 5 of IC1701 ?
Yes
No
Check the main PWB.
No
Check connection between IC1701 and CN1501.
Check the periphery of IC1701, and the pins 70, 71, 72, and
73 of IC1201.
73 of IC1201.
Yes
Yes
Does the level of pins 3, 26 and 43 of IC1401 in record state
differ from that in playback state ?
differ from that in playback state ?
Check IC1300 to 1302 and periphery of CN1300.
Check periphery of IC1401.
– 85 –
SD-NX10H
• The sled motor does not rotate.
Yes
Do the pins 23 of IC1201 change with the
/
button ?
No
No
Do the pins 14 and 15 of IC1601 and the pins 1 and 2 of CN1401
change with the / button ?
change with the / button ?
Check IC1601 and soldering of CN1401
Yes
Does voltage of the + and - terminals on the sled motor
change with the / button ?
change with the / button ?
No
Check the soldering connected to the sled motor and for
disconnection.
disconnection.
Yes
Replace the sled motor.
• The spindle motor does not rotate.
Is waveform output from the pins 25 of IC1201 in the step 4 of
AUTO auxiliary adjustment mode of TEST mode ?
AUTO auxiliary adjustment mode of TEST mode ?
Check IC1601, CN1402, and soldering of mechanism switch PWB.
Is waveform output from the pins 9 and 10 of IC1601 and the
pins 4 and 5 of CN1401 ?
pins 4 and 5 of CN1401 ?
Replace with a spindle motor (complete).
No
No
Yes
Yes
Check the pins 25 of IC1201, soldering of peripheral circuit, and
parts.
parts.
Check the waveform of pins 23 of IC1201, peripheral parts, and
soldering.
soldering.
Check in the test mode
SD-NX10H
– 86 –
FUNCTION TABLE OF IC
ICU01 VHiLC75341M-1: Audio Processor (LC75341M)
1
DI
Serial data and clock input terminal for control.
2
CE
Chip enable terminal.
When changing from "H" to "L", data is written in the internal latch and each analog switch is turned on.
Data transmission is enabled at "H" level.
When changing from "H" to "L", data is written in the internal latch and each analog switch is turned on.
Data transmission is enabled at "H" level.
3
VSS
Ground terminal.
4
LOUT
Bass band filter construction capacitor/resistor connection terminal and bass/treble output terminal.
5
LBASS
Bass band filter capacitor and resistor connection terminal.
6
LTRE
Treble band filter capacitor connection terminal.
7
LIN
L-CH signal input terminal.
8
LSEL0
Input selector output terminal.
9-12 (11*)
L4-L1
Input signal terminal.
13-16 (14*) R1-R4
Input signal terminal.
17
RSEL0
Input selector output terminal.
18
RIN
R-CH signal input terminal.
19
RTRE
Treble band filter capacitor connection terminal.
20
RBASS
Bass band filter capacitor and resistor connection terminal.
21
ROUT
Bass band filter capacitor/resistor connection terminal and bass/treble output terminal.
22
Vref
0.5
×
VDD voltage generation section for analog ground. Connect a capacitor of 10
µ
F or more between
Vref and AVSS (VSS) as a countermeasure against the power supply ripple.
23
VDD
Power supply terminal.
24
CL
Serial data and clock input terminal for control.
Pin No.
Terminal Name
Function
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
Figure 86 BLOCK DIAGRAM OF IC
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
LVref
RVref
CCB
INTERFACE
CONTROL
CIRCUIT
LOGIC
CIRCUIT
CONTROL
CIRCUIT
ROUT
RBASS
RTRE
RIN
RSELO
L1
L2
L3
L4
R1
R2
R3
R4
LOUT
LBASS
LTRE
LIN
LSELO
VSS
CE
DI
CL
VDD
Vref
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
LC75341M
CL
VDD
VREF
ROUT
RBASS
RTRE
RIN
RSELO
R4
R3
R2
R1
DI
CE
VSS
LOUT
LBASS
LTRE
LIN
LSEL0
L4
L3
L2
L1
– 87 –
SD-NX10H
1
VDDL
Input
L channel digital output section power terminal
2
OUTL (+)
Output
L channel forward output terminal
3
OUTL (–)
Output
L channel reverse output terminal
4
GNDD
—
Digital output section ground terminal
5
OUTR (–)
Output
R channel reverse output terminal
6
OUTR (+)
Output
R channel forward output terminal
7
VDDR
Input
R channel digital output section power terminal
8
VDDX
Input
Oscillation section power terminal
9
XI
Input
Quartz oscillator connection terminal. Clock necessary for the system is generated.
10
XO
Output
Quartz oscillator connection terminal. Clock necessary for the system is generated.
11
GNDX
—
Oscillation section ground terminal
12*
MCK
Output
System clock output terminal
13
TEST
Input
Test terminal. As usual, it is used at "L".
14
NFR1 (+)
Input
R channel forward signal feedback input terminal
15
NFR2 (–)
Input
R channel reverse signal feedback input terminal
16
GNDA
—
Analog ground terminal for AD converter
17
Rch IN
Input
R channel analog input terminal
18
Rch Vref
Input
Reference voltage terminal for R channel
19
Lch Vref
Input
Reference voltage terminal for L channel
20
Lch IN
Input
L channel analog input terminal
21
RESET
Input
Reset terminal. It is reset with "L".
22
NFL2 (–)
Input
L channel reverse signal feedback input terminal
23
NFL1 (+)
Input
L channel forward signal feedback input terminal
24
VDDA
Input
Analog current terminal for AD converter
Pin No.
Port Name
Input/Output
Function
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
ICA100 RH-iX2815AFZZ: 7th Order Modulation Conversion LSI (IX2815AF)
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VDDL
VDDA
NFL1(+)
NFL2(–)
RESET
Lch IN
Lch Vref
Rch Vref
Rch IN
GNDA
NFR2(–)
NFR1(+)
TEST
OUTL(+)
OUTL(–)
GNDD
OUTR(–)
OUTR(+)
VDDR
VDDX
XI
XO
GNDX
MCK
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
VDA
NFL1(+)
NFL2(–)
RESET
Lch IN
Lch Vref
Rch Vre
f
Rch IN
GNDA
NFR2(–)
NFR1(+)
TEST
VDDL
OUTL(+)
OUTL(–)
GNDD
OUTR(–)
OUTR(+)
VDDR
VDDX
XI
XO
GNDX
MCK
Comparator
Comparator
Amplitude Doubling
Converter
Amplitude Doubling
Converter
Oscillator
Lch 7th order
Modulation Circuit
Rch 7th order
Modulation Circuit
Figure 87 BLOCK DIAGRAM OF IC
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