SD-CX1 (serv.man10). Part 7 - Waveforms, Troubleshooting tables, IC tables - Sharp Audio Service Manual (repair manual)

Model: SD-CX1 (serv.man10)
Pages: 34
Size: 1.27 MB
Type: PDF
Document: Service Manual
Brand: Sharp
Device: Audio / System / Part 7 - Waveforms, Troubleshooting tables, IC tables
File: sd-cx1-sm10.pdf
Date: 2018-11-20

Next: Sharp SD-CX1 (serv.man11) Specification

Read Sharp SD-CX1 (serv.man10) Service Manual online

– 69 –
SD-CX1H
WAVEFORMS OF 1-BIT AMP. CIRCUIT
T
2
1
2.00V/div
500ns/div
194.545465
µ
s
520mV
2.00V/div
AD IC Output
+ Side
- Side
5V
Amplitude
from 0 to 5 V
1
2
2
1
2.00V/div
500ns/div
194.545465
µ
s
-12.30V
2.00V/div
AD IC NF IN
In partial pressure OUT, 4 to 7 V amplitude 
of GND reference is observed.
In IC of 75 kohms, the reference is 2.5 V 
because of VREF. Due to imaginary GND 
of operational amplifier inside IC, the 
waveform cannot be monitored.
This waveform is partial pressure OUT.
3
4
T
2.00V/div
50.0ns/div
0.0s
-12.30V
2.00V/div
LEVEL SHIFT OUT
DEAD TIME
ZOOM UP
Dead time is generated by level 
shift input.  
Leading edge is delayed at CR, 
passing R at DI.
Set value: 20 -25 nsec
5
6
T
2.00V/div
500ns/div
194.545465
µ
s
-12.47V
2.00V/div
POWER SUPPLY
LEVEL SHIFT OUT
5V
Waveform after level shift
On the reference side, 5 V amplitude 
is observed at + 2 V (negative supply 
voltage), corresponding to VINH and 
VINL of gate driver during 9 V operation. 
(Approx. 0.8 VCC and 0.2 VSS)
7
8
FET is based on the negative 
supply voltage; the gate voltage 
of the LOW side FET operates 
with the negative power and + 9 V.
To make HIGH SIDE FET 
completely on, the positive 
supply voltage of + 4.5 V or over 
is required. At the bootstrap, the 
gate drive voltage is generated; 
the HIGH side is driven between 
(positive power) + 6 V and the 
negative power.
T
2
1
10.0V/div
500ns/div
194.545465
µ
s
-12.3V
10.0V/div
HIGH SIDE OUT
LOW SIDE OUT
GATE DRIVE OUT
9
10
T
10.0V/div
500ns/div
194.545465
µ
s
-12.3V
10.0V/div
+SIDE
+FETOUT
- SIDE
Waveforms before low-pass filters at both ends of the speaker
H-bridge may be considered as BTL. 
However, here and at the gate drive, dead time is not observed;  
since bootstrap operates based on output, DEAD TIME part is in floating
condition. The waveform on the HI GH side shows that only the booted
voltage lowers. 
2
1
11
12

SD-CX1H
– 70 –
WAVEFORMS OF MD CIRCUIT
POWER ON
TOC READ (Low reflection disc)
TOC READ (Low reflection disc)
TOC READ (Low reflection disc)
PLAY (Low reflection disc)
PLAY (Low reflection disc)
TOC READ (High reflection disc)
TOC READ (High reflection disc)
TOC READ(High reflection disc)
STOP ---> PLAY
TP1518
(RESET)
TP1800
(3.2V)
TP1511
(PCONT0)
TP1212
(FEMON)
TP1422
(DSENSE)
TP1420
(FOK)
TP1201
(EFMMON)      
TP1135
(ADIPO) 
TP1122
(F+)
TP1207
(TEMON)
TP1603
(SP+)
TP1602
(SP-)
TP1122
(F+)
TP1122
(F+)
TP1207
(TEMON)
TP1603
(SP+)
TP1602
(SP-)
1
2
3
4
4
6
10
11
4
6
10
11
4
5
12
13
14
15
5
6
7
4
5
6
7
4
6
8
9
4
6
8
9
TP1122
(F+)
TP1212
(FEMON)
TP1207
(TEMON)
TP1451
(ADJUST)   
TP1122
(F+)
TP1212
(FEMON)
TP1207
(TEMON)
TP1451
(ADJUST)   
TP1122
(F+)
TP1207
(TEMON)
TP1601
(SLD+)   
TP1600
(SLD-)   
TP1122
(F+)
TP1207
(TEMON)
TP1601
(SLD+)   
TP1600
(SLD-)   

– 71 –
SD-CX1H
REC
Analog REC
Digital REC
Double speed REC
PLAY
PLAY(1kHz 0dB)
PLAY
TP1201
(EFMMON)    
TP1201
(EFMMON)    
TP1530
(CDLRCK)   
TP1515
(DIGIN)   
TP1533
(CDDATA)   
TP1524
(L OUT)   
TP1526
(R OUT)   
TP1531
(CDBCK)   
TP1207
(TEMON)
TP1207
(TEMON)
TP1121
   (T+)
TP1421
   (CIN)
TP1121
   (T+)
TP1421
   (CIN)
72
IC1201
   (DFCK)
72
IC1201
   (DFCK)
TP1300
   (REC HEAD)       
TP1302
   (EFMO)       
TP1105
   (LDVAL)       
TP1113
         (R/P)       
71
IC1201
   (BCLK) 
3
IC1202
       (WE) 
17
IC1202
       (CAS) 
1
IC1202
       (I/01) 
6
IC1202
       (A0) 
70
IC1201
   (LRCK) 
74
IC1201
   (DADATA) 
71
IC1201
   (BCLK) 
70
IC1201
   (LRCK) 
73
IC1201
   (ADDATA) 
PLAY (Low reflection disc)
PLAY (High reflection disc)
14
28
29
30
31
18
32
20
21
33
34
35
36
6
16
17
14
6
16
17
18
19
20
21
22
23
24
25
26
27

SD-CX1H
– 72 –
WAVEFORMS OF CD CIRCUIT
T
IC2 11pin
Stopped
CH1=200mV
2000/09/18   16:56:26
DC   10:1
5ms/div
(5ms/div)
NORM:200kS/s
1
=Record Length=
Smoothing :   ON
CH1  :      0.000V
CH2  :        0.00V
Main  :         10K
Zoom  :         4K
Mode  :   AUTO
Type   :   EDGE CH1
Delay  :                102.3ns
Hold off  :         MINIMUM
CH3  :        0.00V
CH4  :        0.00V
BW   : 20MHz
=Trigger=
=Filter=
VAR
CH1  V/DIV
CAL
=Offset=
CH1
  V/DIV
  200mV
T
Disc playback
When there is no
wound in the disc.
1
Tracking error
TEO
T
TEO
Stopped
CH1=1V
2000/09/18   16:55:04
DC   10:1
5ms/div
(5ms/div)
NORM:200kS/s
1
=Record Length=
Smoothing :   ON
CH1  :        0.00V
CH2  :        0.00V
Main  :         10K
Zoom  :         4K
Mode  :   AUTO
Type   :   EDGE CH1
Delay  :                102.3ns
Hold off  :         MINIMUM
CH3  :        0.00V
CH4  :        0.00V
BW   : 20MHz
=Trigger=
=Filter=
VAR
CH1  V/DIV
CAL
=Offset=
CH1
  V/DIV
       1V
T
By the 
test mode 3
1
Tracking
IC2 11pin
T
TEO
RFRP
Stopped
CH1=1V
2000/09/18   17:01:23
DC   10:1
CH2=1V
DC   10:1
2ms/div
(2ms/div)
NORM:500kS/s
1
2
=Record Length=
Smoothing :   ON
CH1  :        0.00V
CH2  :        0.00V
Main  :         10K
Zoom  :         5K
Mode  :  SINGLE
Type   :  EDGE CH1
Delay  :                102.3ns
Hold off  :         MINIMUM
CH3  :        0.00V
CH4  :        0.00V
BW   : 20MHz
=Trigger=
=Filter=
CH2
CH3
CH4
EXT
LINE
=Offset=
CH1
  Level
    0.54V
T
Track jump
CH1
1
During the tracking jump TEO, RFRP
2
IC2 11pin
IC2 17pin
T
IC2 15
 
pin
IC1 4 pin
IC1 3 pin
Stopped
CH1=500mV
2000/09/18   15:29:21
DC   10:1
CH2=2V
DC   10:1
CH3=2V
DC   10:1
2ms/div
(2ms/div)
NORM:500kS/s
1
2
3
=Record Length=
Smoothing :   ON
CH1  :      0.000V
CH2  :        0.00V
Main  :         10K
Zoom  :         5K
Mode  :  SINGLE
Type   :  EDGE CH2
Delay  :                102.3ns
Hold off  :         MINIMUM
CH3  :        0.00V
CH4  :        0.00V
BW   : 20MHz
=Trigger=
=Filter=
CH1
CH3
CH4
EXT
LINE
=Offset=
CH2
  Level
    2.48V
T
When a cap was
closed, disc, 
dovetail
CH2
3
4
5
Focus servo on
FEO
FO+
FO-
T
RFGO
Stopped
CH1=500mV
2000/09/18   14:55:22
DC   10:1
500ms/div
(500ms/div)
NORM:200kS/s
1
=Record Length=
Smoothing :   ON
CH1  :      0.000V
CH2  :        0.00V
Main  :          1K
Zoom  :       400
Mode  :  SINGLE
Type   :  EDGE CH1
Delay  :                102.3ns
Hold off  :         MINIMUM
CH3  :      0.000V
CH4  :        0.00V
BW   : 20MHz
=Trigger=
=Filter=
Format
BMP
FileName
AutoFile
ON
OFF
To
TopMenu
=Offset=
Disc playback
T
6
RF
IC2 19 pin
T
DMO
RFDC
RFRP
Stopped
CH1=1V
2000/09/18   16:45:07
DC   10:1
CH2=1V
DC   10:1
CH3=1V
DC   10:1
500ms/div
(500ms/div)
NORM:2kS/s
1
2
3
=Record Length=
Smoothing :   ON
CH1  :        0.00V
CH2  :        0.00V
Main  :         10K
Zoom  :         4K
Mode  :  SINGLE
Type   :  EDGE CH1
Delay  :                102.3ns
Hold off  :         MINIMUM
CH3  :        0.00V
CH4  :        0.00V
BW   : 20MHz
=Trigger=
=Filter=
=Offset=
T
CD test 2->3 
upgrade
CH3
  V/DIV
    1V
7
Disc motor and CD related signal
8
2
IC3 41pin
IC2 12pin
IC2 17pin

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Download Sharp SD-CX1 (serv.man10) Service Manual (Repair Manual)

Here you can read online and download Sharp SD-CX1 (serv.man10) Service Manual in PDF. SD-CX1 (serv.man10) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp SD-CX1 (serv.man10) System. Information contained in service manuals typically includes schematics / circuit diagrams, wiring diagrams, block diagrams, printed wiring boards, exploded views, parts list, disassembly / assembly, pcb.

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