Sharp XL-HF401PH (serv.man5) Service Manual ▷ View online
XL-HF401PH
4 – 1
CHAPTER 4. FLOWCHART
[1] Troubleshooting
1. When the CD does not function
The CD section may not operate when the objective lens of the optical pickup is dirty. Clean the objective lens, and
check the playback operation. When this section does not operate even after the above step is taken, check the
following items.
check the playback operation. When this section does not operate even after the above step is taken, check the
following items.
Remove the cabinet and follow the troubleshooting instructions.
"Track skipping and/or no TOC (Table Of Contents) may be caused by build up of dust other foreign matter on the
laser pickup lens. Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned
below."
laser pickup lens. Before attempting any adjustment make certain that the lens is clean. If not, clean it as mentioned
below."
Turn the power off.
Gently clean the lens with a lens cleaning tissue and a small amount of isopropyl alcohol.
Do not touch the lens with the bare hand.
2. When a CD cannot be played
2.1. Pressing the CD operation key is accepted, but playback does not occur.
1) Focus-HF system check
2) Tracking system check
3) Spin system check
4) PLL system check
Parts code
1.
CD optical pickup Lens cleaner disc
UDSKA0004AFZZ
HOW TO USE
CAUTION
Cleaning fluid
Cleaner disc
Using the brush in the cleaner cap, apply 1 or 2 drops of the cleaning fluid to the
brush on the CD cleaner disc which has the mark next to it.
Place the CD cleaner disc onto the CD disc tray with the brush side down, then
press the play button.
You will hear music for about 20 seconds and the CD player will automatically stop.
If it still play continuously, press the stop button.
1.
2.
3.
The CD lens cleaner should be effective for 30-50 operations, however if the
brushes become worn out earlier then please replace the cleaner disc.
If the CD cleaner brushes become very wet then wipe off any excess fluid with a soft
cloth.
Do not drink the cleaner fluid or allow it contact with the eyes. In the event of this
happening then drink and / or rinse with clean water and seek medical advice.
The CD cleaner disc must not be used on car CD players or on computer CD-ROM
drives.
All rights reserved. Unauthorized duplicating, broadcasting and renting this product
is prohibited by law.
XL-HF401PH
4 – 2
(1) Focus-HF system check.
Figure 2
Figure 3
102
101
IC1
IC1
1
FDO
TDO
Figure 1
Press the Tray1 CD Eject Button without inserting a disc, and try
starting the playback operation.
starting the playback operation.
2. Does the focus (lens) move up and down ?
(Waveform drawing Figure 1)
(Waveform drawing Figure 1)
1. Is focus servo activated ?
(Waveform drawing Figure 2)
(Waveform drawing Figure 2)
2. Is the RF waveform normal ?
(Waveform drawing Figure 3)
(Waveform drawing Figure 3)
1. Does the pickup move to the PICKUP-IN Switch (NSW1)
position ?
Sled motor (NM2).
Check the focus peripheral circuit.
Check the laser diode driver Q5 peripheral circuit.
Spindle motor (NM1).
If the level is not normal.
Pins 98, 99, 101, 102, 106 ~ 113 on IC1.
Check the laser diode driver Q4 peripheral circuit.
Check the laser diode driver Q4 peripheral circuit.
3. Is the laser lit ?
4. Is the turntable rotating ?
When a disc is loaded, start playback operation.
Although a CD is inserted and the cover is
closed, "NO DISC" is displayed.
closed, "NO DISC" is displayed.
Yes
Yes
Yes
Yes
No
No
No
No
No
No
2
102
63
IC1
IC1
1
4
118
IC1
7
FDO
TE
RFOUT
XL-HF401PH
4 – 3
The tracking servo is not activated.
Check the peripheral circuits at pins 98, 99, 101, 102 on IC1 and
FFC1.
Check the peripheral circuits at pins 98, 99, 101, 102 on IC1 and
FFC1.
(2) Focus-RF system check.
If the waveform shown in Figure 4 appears and soon after NO
DISC appears ?
DISC appears ?
Check the TE waveform at pin 16 on IC1.
"Initialization" is possible, but play is not possible ?
No
Yes
A normal jump operation cannot be completed or the begining of
the track cannot be found.
Check the around pin 101 on IC1.
the track cannot be found.
Check the around pin 101 on IC1.
Yes
"Initialization" is not possible.
No
When a disc is loaded, start play operation.
The RF waveform is normal, but the TOC data cannot be read.
Check the PLL waveform. (Figure 6)
Check around pins 125 ~ 128 on IC1.
Data cannot be read. Check the VCO - PLL (Pin no. 125 ~128
on IC1) system.
on IC1) system.
(3) Spin system check.
(4) PLL system check.
Press the OPEN/CLOSE switch without inserting a disc, and
then try starting the play operation.
then try starting the play operation.
1. The turntable rotates a little ?
(Waveform drawing Figure 5)
(Waveform drawing Figure 5)
Yes
2. The turntable does not rotate.
The spin driver circuit is OK.
Check around pin 98 on IC1, pins 1 and 2 on CNP2.
No
Figure 5
Figure 4
63
118
IC1
IC1
4
TE
RFOUT
7
102
98
IC1
IC1
1
FDO
SPDO
3
Figure 6
126
127
IC1
IC1
5
PLLF
PLLFO
6
102
IC1
FDO
1
XL-HF401PH
5 – 1
CHAPTER 5. MAJOR PART DRAWING
[1] Function Table Of IC
IC500 RH-IXA336AW00 : Microcomputer IXA336AW00 (1/4)
Pin
No.
No.
NAME
Input/
Output
Type
Description
1
FW_UPD_PRO
Input
CMOS Input /
Output
FIRMWARE UPDATE PROGRESS
P141/PCLBUZ1/INTP7
2
USB_IN
Input
CMOS Input /
Output
USB DETECTION
H : DETACH , L : ATTACH
H : DETACH , L : ATTACH
P140/PCLBUZ0/INTP6
3
CD_RST
Output
CMOS Input /
Output
CD DSP RESET
P120/ANI19
4
CD_SI
Output
CMOS Input /
Output
DATA INPUT TO CD DSP
P45/SO01
5
CD_SO
Input
CMOS Input /
Output
DATA OUTPUT FROM CD DSP
P44/SI01/SDA01
6
CD_SCLK
Output
CMOS Input /
Output
DATA TRANSMISSION/RECEPTION SYNCHRONOUS CLOCK
TO CD DSP
TO CD DSP
P43/SCK01/SCL01
7
NC
Output
CMOS Input /
Output
FIX "L"
P42/TI04/TO04
8
CD_MREQ
Output
CMOS Input /
Output
DATA TRANSMISSION REQUEST TO CD DSP
P41/TI07/TO07
9
TOOL
FLASH . MEMORY . PROGRAM/ I/O DATA FOR DEBUG
P40/TOOL0
10
RESET
RESET INPUT. ACTIVE "L"
CONNECT TO WRITER RESET LINE DURING FLASH
CONNECT TO WRITER RESET LINE DURING FLASH
RESET
11
XCOUT
32.768kHz CRYSTAL (SUB CLOCK)
P124/XT2/EXCLKS
12
XCIN
32.768kHz CRYSTAL (SUB CLOCK)
P123/XT1
13
CD_SREQ
Input
CMOS Input /
Output
DATA TRANSMISSION REQUEST FROM CD DSP
P137/INTP0
14
NC
Input
CMOS Input /
Output
Connect to VSS through resistor
P122/X2/EXCLK
15
NC
Input
CMOS Input /
Output
Connect to VSS through resistor
P121/X1
16
REGC
Connect to VSS through condensor0.471F
REGC
17
VSS
VSS
18
VSS
EVSS0
19
VDD
VDD
20
VDD
EVDD0
21
TUN/DAP_SCL
Output
Nch
TUNER/DAP CLOCK I2C BUS LINE
P60/SCLA0
22
TUN/DAP_SDA
Input /
Output
Nch
TUNER/DAP DATA I2C BUS LINE
P61/SDAA0
23
TUN_RST
Output
Nch
TUNER RESET CONTROL
P62/SCLA1
24
SWF_MUTE
Output
Nch
SUB-WOOFER MUTE CONTROL
H: MUTE ON, L: MUTE OFF
H: MUTE ON, L: MUTE OFF
P63/SDAA1
25
RX_IN
Input
CMOS Input /
Output
REMOCON SENSOR INPUT
P31/TI03/TO03/INTP4
26
DAP_RST
Output
CMOS Input /
Output
DAP RESET CONTROL
H : NORMAL , L : RESET
H : NORMAL , L : RESET
P64/TI10/TO10
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