CD-DP900 (serv.man19). Notes on schematic diagrams and waveforms - Sharp Audio Service Manual (repair manual)

Model: CD-DP900 (serv.man19)
Pages: 2 Few pages! See other manuals at the bottom of the first or last page.
Size: 338.73 KB
Type: PDF
Document: Service Manual
Brand: Sharp
Device: Audio / System / Notes on schematic diagrams and waveforms
File: cd-dp900-sm19.pdf
Date: 2018-11-20

Next: Sharp CD-DP900 (serv.man20) Service Manual

Read Sharp CD-DP900 (serv.man19) Service Manual online

– 23 –
CD-DP900H/E
•
 The indicated voltage in each section is the one measured
by Digital Multimeter between such a section and the chas-
sis with no signal given.
1. In the tuner section,
(  ) indicates AM
< > indicates FM stereo
2. In the main section, a tape is being played back.
3. In the deck section, a tape is being played back.
(  ) indicates the record state.
4. In the power section, a tape is being played back.
5. In the CD section, the CD is stopped.
•
 Parts marked with “       ” (                          ) are important for
maintaining the safety of the set. Be sure to replace these
parts with specified ones for maintaining the safety and
performance of the set.
NOTES ON SCHEMATIC DIAGRAM
•
 Resistor:
To differentiate the units of resistors, such symbol as K and
M are used: the symbol K means 1000 ohm and the symbol
M means 1000 kohm and the resistor without any symbol is
ohm-type resistor. Besides, the one with “Fusible” is a fuse
type.
•
 Capacitor:
To indicate the unit of capacitor, a symbol P is used: this
symbol P means micro-micro-farad and the unit of the
capacitor without such a symbol is microfarad. As to
electrolytic capacitor, the expression “capacitance/withstand
voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
(ML): Mylar type
(P.P.): Polypropylene type
•
 Schematic diagram and Wiring Side of P.W.Board for this
model are subject to change for improvement without prior
notice.
REF. NO
DESCRIPTION
POSITION
POSITION
SW714
VIDEO
ON—OFF
SW715
TIMER/SLEEP
ON—OFF
SW716
TUNING UP
ON—OFF
SW717
REC/PAUSE
ON—OFF
SW718
MEMORY SET
ON—OFF
SW719
TUNING DOWN
ON—OFF
SW720
CLOCK
ON—OFF
SW721
VOLUME UP
ON—OFF
SW722
VOLUME DOWN
ON—OFF
SW723
DISC SKIP
ON—OFF
SW724
OPEN CLOSE
ON—OFF
SW725
EQUALISER/X-BASS/DEMO
ON—OFF
SW727
DISPLAY MODE
ON—OFF
SW728
ASPM
ON—OFF
SW729
PTY.TI SEARCH
ON—OFF
REF. NO
DESCRIPTION
SW1
OPEN/CLOSE
ON—OFF
SW2
CLAMP
ON—OFF
SW3
DISC NUMBER
ON—OFF
SW4
PICKUP IN
ON—OFF
SW701
ON/STAND-BY
ON—OFF
SW702
REV
ON—OFF
SW703
FF
ON—OFF
SW704
STOP
ON—OFF
SW705
PLAY
ON—OFF
SW706
PHANTOM
ON—OFF
SW707
NORMAL
ON—OFF
SW708
BYPASS
ON—OFF
SW711
CD
ON—OFF
SW712
TUNER
ON—OFF
SW713
TAPE
ON—OFF
(1)  (2) (3) 
(S) (G) (D) 
E   C    B 
FRONT
VIEW
KTA1266  GR
KRC102  M
KRC104  M
KTA1274 Y
KTA1273  Y
KTC3203  Y
KTC3199  GR
2SC380  O
2SC1845  F
KTC2026
SLR342VC
B C E
FRONT
VIEW
FRONT
VIEW
Figure 23 TYPES OF TRANSISTOR AND LED
•
 SW727~729 (CD-DP900H ONLY)

CD-DP900H/E
– 24 –
T
T
DATA
DATACK
LRSY
Stopped
CH1=2 V
DC   10:1
CH2=2 V
DC   10:1
CH3=2 V
DC   10:1
5 
µ
s/div
(5 
µ
s/div)
NORM:100 kS/s
1
2
3
=Record Length=
Smoothing :   ON
CH1  :        0.00 V
CH2  :        0.00 V
Main  :        5 K
Zoom  :     100
Mode  :   AUTO
Type   :   EDGE CH3
Delay  :                    0.0 ns
Hold off  :                0.2 
µ
s
CH3  :        0.00 V
CH4  :        0.00 V
BW   : FULL
=Trigger=
=Filter=
=Offset=
CH3
  v/DIV
       2 V
1999/04/05  20:50:17
10
IC1   58
IC1  59
IC1  60
11
12
T
T
DOUT
Stopped
CH1=2 V
DC   10:1
500 ns/div
1999/04/07  09:25:28
(500 ns/div)
NORM:200 MS/s
1
=Record Length=
Smoothing :   ON
CH1  :        0.00 V
CH2  :        0.00 V
Main  :         1 K
Zoom  :      100
Mode  :   NORMAL
Type   :   EDGE CH1
Delay  :               2.887 ms
Hold off  :                0.2 
µ
s
CH3  :        0.00 V
CH4  :        0.00 V
BW   : FULL
=Trigger=
=Filter=
=Offset=
9
IC1  39
T
FDO
PDO2
PDO1
Stopped
CH1=500 mV
DC   10:1
CH3=1 V
DC   10:1
CH4=1 V
DC   10:1
500 ms/div
(500 ms/div)
NORM:20 kS/s
1
4
3
=Record Length=
Smoothing :   ON
CH1  :      0.000 V
CH2  :          0.0 V
Main  :      100 K
Zoom  :         2 K
Mode  :   AUTO
Type   :   EDGE CH2
Delay  :                    0.0 ns
Hold off  :                0.2 
µ
s
CH3  :        0.00 V
CH4  :        0.00 V
BW   : FULL
=Trigger=
=Filter=
=Offset=
CH1
  v/DIV
  500 mV
1999/04/05  17:33:17
1
IC1  21
7
IC1  73
8
IC1  74
T
T
FDO
SPDO
Stopped
CH1=200 mV
DC   10:1
CH2=500 mV
DC   10:1
500 ms/div
1999/04/07  09:51:15
(500 ms/div)
NORM:20 kS/s
2
1
=Record Length=
Smoothing :   ON
CH1  :      0.000 V
CH2  :      0.000 V
Main  :      100 K
Zoom  :         2 K
Mode  :   NORMAL
Type   :   EDGE CH2
Delay  :               2.924 ms
Hold off  :                0.2 
µ
s
CH3  :        0.00 V
CH4  :        0.00 V
BW   : FULL
=Trigger=
=Filter=
=Offset=
1
IC1  21
6
IC1  22
T
T
TE
DRF
Stopped
CH1=10 V
DC   10:1
CH2=1 V
DC   10:1
100 ms/div
(100 ms/div)
NORM:100 kS/s
2
1
=Record Length=
Smoothing :   ON
CH1  :           0.0 V
CH2  :         0.00 V
Main  :      100 K
Zoom  :         2 K
Mode  :   NORMAL
Type   :   EDGE CH1
Delay  :               2.924 ms
Hold off  :                0.2 
µ
s
CH3  :         0.00 V
CH4  :         0.00 V
BW   : FULL
=Trigger=
=Filter=
=Offset=
3
IC1  67
4
IC1  15
Vp-p=1.0 V~1.3 V
0.5 mV/div,0.5 
µ
sec/div
5
IC1   4
T
FDO
DRF
TE
Stopped
CH1=500 mV
DC   10:1
CH2=10 V
DC   10:1
CH3=1 V
DC   10:1
500 ms/div
(500 ms/div)
NORM:20 kS/s
1
2
3
=Record Length=
Smoothing :   ON
CH1  :      0.000 V
CH2  :          0.0 V
Main  :      100 K
Zoom  :         2 K
Mode  :   AUTO
Type   :   EDGE CH1
Delay  :                   0.0 ns
Hold off  :                0.2 
µ
s
CH3  :        0.00 V
CH4  :        0.00 V
BW   : FULL
=Trigger=
=Filter=
=Offset=
-3 div
-1 div
0 div
+1 div
+3 div
CH  Position  To
CH2
  Position
  0.20 div
1
IC1  21
3
IC1  67
4
IC1  15
T
FDO
TDO
Stopped
CH1=500 mV
DC   10:1
CH3=500 mV
DC   10:1
500 ms/div
(500 ms/div)
NORM:20 kS/s
1
3
=Record Length=
Smoothing :   ON
CH1  :      0.000 V
CH2  :          0.0 V
Main  :      100 K
Zoom  :         2 K
Mode  :   AUTO
Type   :   EDGE CH1
Delay  :                   0.0 ns
Hold off  :                0.2 
µ
s
CH3  :      0.000 V
CH4  :        0.00 V
BW   : FULL
=Trigger=
=Filter=
=Offset=
CH1
  v/DIV
  500 mV
1
IC1  21
2
IC1  20
WAVEFORMS OF CD CIRCUIT

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Here you can read online and download Sharp CD-DP900 (serv.man19) Service Manual in PDF. CD-DP900 (serv.man19) service manual will guide through the process and help you recover, restore, fix, disassemble and repair Sharp CD-DP900 (serv.man19) 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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