Sharp MD-X8 Service Manual Page 51
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- Table of contents
- TROUBLESHOOTING
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MD-X8
Figure 51 SCHEMATIC DIAGRAM (10/20)
7
8 9 10 11 12
12
11
10
9
8
7
6
5
4
3
2
1
4
3
2
1
6
5
5
6
6
5
8
7
6
5
4
3
2
1
6
5
4
3
2
1
8
7
4
3
2
1
8
7
4
3
2
1
8
7
4
3
2
1
12
11
10
9
8
7
6
5
4
3
2
1
4
3
2
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
+B
+B
+B
+B
+B
+B
+B
+B
+B+B
+B
+B
+B+B+B
+B +B
SW781 ~ SW784 : MULTI CONTROL
CNP975
TO MAIN PWB
P40 1-B
TO MAIN PWB
CNP970
P40 1-C
IC751 ~ IC753 : LCD AMP.
PWB-C6
SWITCH A PWB-C2
MD-PLAY
/PAUSE
M REC
INTER NET
MD PLAY
DISC2 P
DISC3 P
MD IN DISC1 P
CD PLAY
SRS
SW9
SW8
SW7
SW5
VDD
SW10
SW11
SW12
LCK1
SW5
SW4
SW3
SW1
SW2
OE
CLK
DATA
VSS
CNP940
FROM MAIN PWB
P41 12-D
VOLUME
FROM MAIN PWB
P41 12-E
CNP930
LCK2
CLK
DATA
D_GND
JOG2
RS
CS3
RESET
+13R5V
+5V
D GND
RESET
CS3
D0
D1
D2
D3
D4
D5
D6
D7
RS
WR
RD
–
–
+
+
E
XA
+
–
+
–
+
–
+
–
D7
RD
D0
D2
D1
D6
D5
D4
D3
WR
JOG1
RX_IN
D_GND
+13R5V
+5V
KEY3
KEY2
KEY1
KEY0
R754
270K
TP701
THERMISTOR
+B
BI752
BI755
CNS752
+B
R794
1K
R792
1K
LED771
R342MGF7
LED772
R342MGF7
LED773
SLR325MG
LED774
SLR325MG
LED775
SLR325MG
R791
1K
R793
1K
R795
1K
SW772
CD PLAY/PAUSE
SW771
ENTER
R778
1K
C773
150P
C772
150P
C771
390P
R776
1K
R777
1K
CNP773
CNP774
C775
1/50
IC771
BU2092F
C774
150P
SW788
MD-STOP
SW785
PRE-EQ
SW786
X-BASS
SW787
3D SURROUND
SW789
SW78
MULTI-LEFT3
SW782
MULTI-RIGHT
SW784
MULTI-UP
R788
18K
R781
1.2K
R783
1.8K
R782
1.5K
R787
8.2K
R784
2.2K
R785
3.3K
R786
4.7K
SW781
MULTI-DOWN
R771
1.2K
2
K
L752
4.7µH
L751
4.7µH
C762
1/50
C761
470P
R759
150K
R758
150K
IC753
BA10358
R755
39K
R757
39K
R756
39K
R753
120K
R752
100K
R760
220
C752
2.2/50
C754
2.2/50
C756
2.2/50
C758
2.2/50
C760
2.2/50
JOG701
C763
47/16
R761
100K
IC751
BA10358
IC752
BA10358
R732
1K
INPUT SELECTOR
10.6V
0V
0V
0.1V
4.7V
4.6V
0V
0.4V
8
7
6
5
4
3
2
1
PIN
NO.
VOLTAGE
IC771
10.4V
10.4V
11.9V
0.5V
10.4V
10.4V
10.4V
0V
16
15
14
13
12
11
10
9
4.3V
4.3V
5.1V
5.1V
5.1V
0V
4.3V
12V
8
7
6
5
4
3
2
1
PIN
NO.
VOLTAGE
IC751
18
17
0V
4.8V
2.8V
2.8V
3.6V
3.6V
3.6V
0V
2.8V
12V
8
7
6
5
4
3
2
1
PIN
NO.
VOLTAGE
IC752
10.8V
1V
8V
8V
8V
0V
0.2V
12V
8
7
6
5
4
3
2
1
PIN
NO.
VOLTAGE
IC753
CNS755
- SERVICE MANUAL 1
- SPECIFICATIONS 2
- IMPORTANT SERVICE NOTES 2
- NAMES OF PARTS 3
- REMOTE CONTROL 4
- MINIDISC SYSTEM LIMITATIONS 5
- If a problem occurs 6
- TROUBLESHOOTING 6
- MD / CD STEREO 7
- Quick-Guide 7
- Guía rápida 7
- DISASSEMBLY 8
- Figure 10-2 10
- Figure 10-3 10
- Figure 10-1 10
- MD Mechanism 11
- MD MECHANISM SECTION 12
- Loading pinch 13
- Fixing washer 13
- (G1) x 1 13
- MD mechanism 13
- CD MECHANISM SECTION 14
- ADJUSTMENT 15
- CD TEST MODE 16
- MD SECTION 17
- • Test Mode 18
- 2. AUTO adjustment mode 19
- 3. RESULT sub-mode 19
- : Measurement value 24
- 8. TEST-PLAY mode 25
- 9. TEST-REC mode 25
- 10. INNER mode 25
- Jitter Meter 26
- EXPLANATION OF ERROR DISPLAY 27
- -PROM Setting Mode Chart 30
- Figure 30 30
- NOTES ON SCHEMATIC DIAGRAM 31
- FAN MOTOR 33
- AC POWER 33
- CORD(265) 33
- M56748FP 35
- TO µ-COM 36
- IX2679AF 37
- MIC PWB-C7 38
- JACK PWB-E 38
- AM SIGNALFM SIGNAL 39
- MAIN PWB-A(1/3) 39
- MAIN PWB-A(2/3) 40
- FM SIGNAL 41
- CD SIGNAL 41
- MAIN PWB-A(3/3) 42
- LC75396E 43
- AUDIO PROCESSOR 43
- MAIN PWB-A 44
- 8 9 10 11 12 45
- FOCUS/TRACKING/ 46
- SPIN/SLIDE DRIVER 46
- MD OPTICAL 48
- PICK UP UNIT 48
- MD MECHANISM SWITCH PWB-H 48
- DISPLAY PWB 50
- LED PWB-C4 50
- SWITCH B PWB-C3 50
- SWITCH C PWB-C5 50
- LAMP PWB-C1 50
- SWITCH A PWB-C2 51
- LAMP PWB-C1 SWITCH A PWB-C2 52
- DISPLAY PWB-C6 53
- POWER PWB-B1 55
- POWER AMP. PWB-B2 57
- SITUATION : 58
- MD MAIN PWB-G 61
- MD MECHANISM SWITCH 62
- MD OPTICIAL PICKUP UNIT 62
- MD PLAYBACK SIGNAL 65
- MD RECORD SIGNAL 65
- MD MAIN PWB -G(TOP) 66
- MD MAIN PWB - G (BOTTOM) 67
- VOLTAGE (MD MAIN PWB) 68
- WAVEFORMS OF CD CIRCUIT 69
- WAVEFORMS OF MD CIRCUIT 70
- D/A CONVERSION PLAY 71
- TROUBLESHOOTING (CD SECTION) 72
- 1.0V/DIV 73
- 0.5µsec/DIV(DC) 73
- (When playing 73
- back the disc) 73
- TROUBLE SHOOTING (MD SECTION) 76
- • Normal playback 78
- • Audio playback circuit 78
- • Focus servo failure 79
- • Disc motor fails to run 80
- • Tracking servo failure 80
- • Slide servo failure 80
- FUNCTION TABLE OF IC 81
- ROM:128K 84
- REF — + 3.15V 89
- PARTS GUIDE 91
- INTEGRATED CIRCUITS 92
- TRANSISTORS 92
- TRANSFORMERS 92
- VARIABLE RESISTORS 93
- VIBRATORS 93
- CAPACITORS 93
- DESCRIPTIONNO 94
- PART CODE NO. PARTS CODE 94
- DESCRIPTION 94
- RESISTORS 95
- DESCRIPTIONPARTS CODE 97
- NO. PART CODE 97
- OTHER CIRCUITRY PARTS 98
- MD MECHANISM PARTS 99
- CD MECHANISM PARTS 100
- CHANGER MECHANISM 100
- CABINET PARTS 100
- OTHER SERVICE PARTS 101
- SPEAKER BOX PARTS 101
- ACCESSORIES 101
- MAIN UNIT 107
- Pad, Remote 107
- Remote Control 107
- ALL RIGHTS RESERVED 108
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