DOWNLOAD Sharp QT-CD161H (serv.man2) Service Manual ↓ Size: 1.91 MB | Pages: 40 in PDF or view online for FREE

Model
QT-CD161H (serv.man2)
Pages
40
Size
1.91 MB
Type
PDF
Document
User Manual / Operation Manual
Brand
Device
Audio / Portable
File
qt-cd161h-sm2.pdf
Date
PREV: Sharp QT-CD161H User Manual / Operation Manual

Sharp QT-CD161H (serv.man2) User Manual / Operation Manual ▷ View online

QT-CD141H/161H/162H
– 29 –
The turntable fails to rotate or rotates at high speed.
Yes
Check the periphery of IC801 pins 23 to 27, pin 39 and pin 40,
IC802 pin 12 and pin 13, IC803 to BI803/CNS803.
The turntable rotates a little.
Yes
The spin driver circuit is normal.
Play operation is performed without disc.
•  Checking the spin system.
No
Yes
Check the IC801 pins 43 and 44, IC802 pins 3, 5, 7, 9 and 10.
Error
Yes
Check PDO waveform (Fig. 29).
•  Checking the VCO-PLL system
Play operation is performed when disc exits.
Yes
Although HF waveform is normal, TOC data cannot be read.
Figure 29
2
3
  0.5s
1.00 V
IC802   3   PDO
  0.5s
1.00 V
IC801  16   FD
As VCO freque-
ncy is locked at
4.32 M Hz, voltage
of PDO rises and
stabilizes.
Stop --> Play
Check IC802 pins 37and 40.
Check the periphery of IC802 (OPAMP).
Abnomal
Usually, the number of pulses of flawless disc is 100 pulses/sec
or less.
No
Yes
Check  IC802 pin 48 (EFLG).
•  Although HF waveform is normal and the time
indication is normal, no sound is emitted.
QT-CD141H/161H/162H
– 30 –
1,2
VL2
VL2
Input
LCD bias setting power input terminal.
3
P67/AN7
LID-SW (CD)
Input
CD cover position detection SW input terminal.
"L" = CD cover CLOSED, "H"= CD cover OPEN.
4
P66/AN6
CLOCK (TUNER)
Output
 PLL IC serial data transmission timing CLOCK output terminal.
5
P65/AN5
DATA (TUNER)
Input/Output PLL IC serial data input/output terminal.
Address 8 bits, sending/receiving 24-bit data.
6
P64/AN4
PERIOD(TUNER)
Output
PLL IC serial data transmission start/stop pulse output terminal.
7
*
P63/AN3
T-MUTE (TUNER)
Output
Tuner output mute output terminal.
"H" = Mute ON.
8
*
P62/AN2
AREA (TUNER)
Input
Destination voltage detection input. Operates as an A/D input port, and when a reset is executed,
detects the DC voltage present at the destination.
9
P61/AN1
KEY1
Input
Operation key input. Max. 8 keys.
10
P60/AN0
KET0
Input
Operation key input. Max. 8 keys.
11
P57/ADT
STEREO
Input
FM stereo broadcast detection input.
(TUNER)
"L" = When receiving a stereo broadcast 
.
12
P56/TOUT
MONO/ST
Output
 FM mode output terminal read by the tuner IF IC.
(TUNER)
"H" = FM stereo mode ("L" = FM mono/AM band).
13
P55/CNTR1
WRQ (CD)
Input
 Detection input to standby with sub Q code output from LC78623D.
14
P54/CNTR0
SD (TUMNER)
Input
Tuner carrier wave detection input.
"L" = When a carrier wave is detected.
15
P53/RTP0
PU IN (CD)
Input
CD pickup position detection SW input terminal.
"L" = Innermost circumference.
16
P52/RTP0
DRF (CD)
Input
HF level detection input terminal from LA9241M.
17
P51/INT3
CD-RESET (CD)
Output
LC78623D reset signal output.
18
P50/INT2
CQCK (CD)
Output
 Serial data synchronous clock for LA9241M/LC78623D interface.
19
P47/SRDY
COIN (CD)
Output
LA9241M/LC78623D control command output terminal.
20
P46/SCLK
RWC (CD)
Output
READ/WRITE control output terminal to LA9241M/LC78623D.
21
P45/TXD
SL+ (CD)
Output
Slide motor forward control output terminal to LA9241M.
22
P44/RXD
SL- (CD)
Output
Slide motor back control output terminal to LA9241M.
23
P43/INT1
REMOCON
Input
Remote control signal input terminal
Detected on the falling edge.
24
P42/INT0
SYS-STOP
Input
Input terminal for detecting a power failure or dead battery.
 "L" = The unit will enter the backup mode.
25
P41/Ø
SQOUT (CD)
Input
Sub code Q data input terminal from LC78623D.
26
*
P40
N.C
—
No connect.
27
RESET
RESET
Input
Microcomputer reset signal input.
28
*
P71/XCIN
N.C
—
No connect.
29
*
P70/XCOUT
N.C
—
No connect.
30
XIN
XIN
Input
Main clock oscillator connection terminal.
31
XOUT
XOUT
Output
Main clock ascillator connection terminal.
32
VSS
VSS
––
Microcomputer power GND.
33
*
P27
P-MUTE1
Output
Audio signal mute condition output terminal.
"H" = Mute ON.
34
P26
P-MUTE2
Output
 Audio signal mute condition output terminal.
"L" = Mute ON.
35
P25
CD-FUNC
Input
 CD function detection input terminal.
"H" = CD function.
36
P24
SYNC-IN
Input
 Record SW detection input terminal.
"H" = Record SW ON.
37
*
P23
N.C
—
 No connect.
38
*
P22
N.C
—
 No connect.
39
*
P21
N.C
—
 No connect.
40
P20
N.C
—
 No connect.
41
*
P17/SEG31
N.C
—
 No connect.
42
*
P16/SEG30
N.C
—
 No connect.
FUNCTION TABLE OF IC
IC501 RH-iX0016SJZZ (IX0016SJ): CD/Tuner Control Microcomputer (1/2)
Port Name
Function
Terminal
Name
Pin No.
Input/
Output
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
QT-CD141H/161H/162H
– 31 –
43
*
P15/SEG29
N.C
—
 No connect.
44
*
P14/SWG28
N.C
—
 No connect.
45
*
P13/SEG27
N.C
—
 No connect.
46
*
P12/SEG26
N.C
—
 No connect.
47
*
P11/SEG25
N.C
—
 No connect.
48
P10/SEG24
N.C
—
 No connect.
49
P07/SEG23
N.C
—
 No connect.
50
P06/SEG22
N.C
—
 No connect.
51
P05/SEG21
N.C
—
 No connect.
52
P04/SEG20
N.C
—
 No connect.
53
P03/SEG19
N.C
—
 No connect.
54
*
P02/SEG18
N.C
—
 No connect.
55
P01/SEG17
N.C
—
 No connect.
56
P00/SEG16
SEG16
Output
 LCD segment output.
57
P37/SEG15
SEG15
Output
 LCD segment output.
58
P36/SEG14
SEG14
Output
 LCD segment output.
59
P35/SEG13
SEG13
Output
 LCD segment output.
60
P34/SEG12
SEG12
Output
 LCD segment output.
61
SEG11
SEG11
Output
 LCD segment output.
62
SEG10
SEG10
Output
 LCD segment output.
63
SEG9
SEG9
Output
 LCD segment output.
64
SEG8
SEG8
Output
 LCD segment output.
65
SEG7
SEG7
Output
 LCD segment output.
66
SEG6
SEG6
Output
 LCD segment output.
67
SEG5
SEG5
Output
 LCD segment output.
68
SEG4
SEG4
Output
 LCD segment output.
69
SEG3
SEG3
Output
 LCD segment output.
70
SEG2
SEG2
Output
 LCD segment output.
71
SEG1
SEG1
Output
 LCD segment output.
72
SEG0
SEG0
Output
 LCD segment output.
73
VCC
VCC
—
Microcomputer power +5V.
74
VREF
VREF
—
A/D converter power +5V.
75
AVSS
AVSS
—
A/D converter power GND.
76
COM3
COM3
Output
 LCD common output terminal.
77
COM2
COM2
Output
 LCD common output terminal.
78
COM1
COM1
Output
 LCD common output terminal.
76
COM0
COM0
Output
 LCD common output terminal.
80
VL3
VL3
Input
 LCD bias setting power input terminal.
IC501 RH-iX0016SJZZ  (IX0016SJ): CD/Tuner Control Microcomputer (2/2)
Port Name
Function
Terminal
Name
Pin No.
Input/
Output
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
QT-CD141H/161H/162H
– 32 –
— M E M O —
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