XL-1500 (serv.man4). Troubleshooting and Function Tables — Sharp Audio Service Manual (repair manual)

Model
XL-1500 (serv.man4)
Pages
9
Size
98.23 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System / Troubleshooting and Function Tables
File
xl-1500-sm4.pdf
Date

View Sharp XL-1500 (serv.man4) Service Manual online

XL-1500H
– 36 –
TROUBLESHOOTING
Cleaner Liquid
Cleaning Disc
PARTS CODE: UDSKA0004AFZZ
HOW TO USE
1. 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.
2. Place the CD cleaner disc onto the CD disc tray with the brush side down, then press the play button.
3. You will hear music for about 20 seconds and the CD player will automatically stop. If it continues to turn, press the stop button.
CAUTION
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 to come in 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 player or on computer CD ROM drives.
All rights reserved. Unauthorized duplicating, broadcasting and renting product is prohibited by law.
When the CD does not function
When the CD section does not operate when the objective lens of the optical pickup is dirty, this section may not operate. 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.
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."
Turn off the power, and wipe the lens softly using a cleaning paper moistened with commercially available cleaning solution so
as not to damage it.
Be careful not to touch the lens with bare hands.
Dust gradually accumulates on the objective lens during use, and it may degrade performance.
To avoid this problem, use a cleaning disc designed for CD optical pickup lenses.
– 37 –
XL-1500H
Make sure that the disc is normal, and set the CD TEST MODE (STEP 1).
Is the measured voltage as specified in circuit diagram?
Check the main unit power supply circuit.
No
Yes
No
Is "Er-CD01" displayed"?
Yes
Move the pickup to most internal circumference side of disc.
Turn the power off and reset the CD TEST MODE (STEP 1).
Is "PU ERROR " not displayed?
Yes
Check the PWB pattern between pin 65 (CD_RES) of IC701 and
pin 63 (RST) of IC801.
No
Is +5V applied to pin 63 (RST) of IC801?
Yes
Is CD Lid switch SW802
ON condition ?
No
Does the CD TEST MODE advance from "STEP 2"?
Yes
Check the between pattern IC701 and SW802 If OK.
Check the main unit power supply circuit.
No
Does the laser come on in CD TEST MODE "STEP 2"?
Check the procedure in "LASER FAILURE".
Yes
Does the CD TEST MODE advance from "STEP 3" to "STEP
4"?
Check the procedure in "FOCUS FAILURE".
Yes
Yes
Does the spindle motor rotate normally when the CD TEST
MODE changes from "STEP 4" to "STEP 3"?
Yes
Is the HF output on pin 24 of IC801 in CD TEST MODE "STEP 5"?
Check the procedure "HF ERROR".
Yes
No
No
No
No
Check the pattern between pin 58 (PU_IN) of IC701 and
CNW704/CNP704.
Check the between CNW704/CNP704 and PU-IN switch.
Set ON condition the CD
Lid switch.
Check the procedure in "SPINDLE MOTOR CLV SERVO
FAILURE".
No
Does the sled motor
move ?
No
Does the sound heard when the optical pickup move to the
selected play by the FF 
 /REW 
 key.
Check the procedure "NO SOUND"
No
Yes
Check the procedure in
"SLED MOTOR
OPERATING FAILURE ".
Does the LCD track number and time indicator work properly ?
Check the pattern between IC701 and LCD701.
Yes
No
Is "Er-CD01 "
displayed ?
No
Turn the power off and then back on.
Does the unit initialize properly and start playback when PLAY
key is pressed?
Check the pattern between pin 58 (PU_IN) of IC701
and CNW704/CNP704. Check the between CNW704/
CNP704 and PU-IN switch.
No
Yes
Check the procedure in
"HF ERROR".
Yes
Does the unit play in order in the FF mode?
Check the procedure in "TRACK SEARCH FAILUR".
Yes
Does playback continue for 30 seconds after the start of
playback ?
Check the procedure in "SLED SERVO FAILURE".
Yes
Normal
No
No
Yes
XL-1500H
– 38 –
Check the PWB pattern between emiter of Q605 and CNP805/
CNW805.
• Laser failure.
Is 0V applied to the pin 38 (SEL) of IC801 ?
Yes
No
Does the laser come on when pattern cut between pin 8 (SEL) of
IC802 and pin 38 (SEL) of IC801 ?
Check the PWB pattern between IC701 and IC801 (BUCK/CCE/
BUS0~3)
Yes
Yes
No
Check the peripheral parts of IC802 and Q801. If it is normal, the
optical pickup is faulty.
No
Check CNP801/CNW801. If it is normal, the optical pickup is
faulty.
Is approx. 2V applied to the collector of Q801.
• Focus failure.
Does the optical pickup move up and down when the disc is
removed?
Is the following waveform ouput at the pin 29 (FEI) of IC801
when the disc is set?
Is the waveform shown above input at the pin 30 (SBAD) of
IC801?
Yes
Yes
No
No
The optical pickup is faulty.
Check as stated in item "FOCUS SERVO SAWTOOTH WAVE
FAILURE".
Yes
Check the periphery of IC802 and CNP801/CNW801. Is it normal?
No
Check the pattern between pin 12 of IC802 and pin 30 of IC801.
Check the periphery of IC802 and CNP801/CNW801.
IC802 is faulty.
Yes
Is +7.2V applied to the pin 1 of CNW805 ?
Is +5V applied to the cathode side of ZD801 ?
Yes
No
No
Check the peripheral parts of ZD801,C802 and C821.
Is +5V applied to the pin 64 (VDD) of IC801 ?
Is +3.3V applied to the pin 1 (VCC) of IC802 ?
Yes
No
No
Check the PWB pattern between cathode side of ZD801 and pin
64 of IC801.
Check the PWB pattern between collector of Q802 and pin 1 of
IC802.
pin 29
(FEI)
pin 33
(FOO)
pin 30
(SBAD)
Yes
Yes
– 39 –
XL-1500H
• Focus servo sawtooth wave failure.
Is +7.0V applied to the pins 21 and 22 (VCC) of IC803 ?
 
Is sawtooh wave output to the pin 33 (FOO) of IC801 ?
IC801 is faulty.
No
Yes
Yes
Is sawtooth wave obtained between pins 17 and 18 of IC803 ?
No
No
Check the PWB pattern
between pin 7 of IC803
and pin 66 (CD STB) of
IC701.
Is +5V applied to the pin 7
(MUTE) of IC803 ?
Check the PWB pattern between pin 33 (FOO) of IC801 and pins
19 and 20 of IC803.  If OK.  IC803 is faulty.
Check the PWB pattern between pin emiter of Q605 and IC803.
No
Is sawtooth wave obtained between pins 13 and 16 of
CNP801/CNW801 ?  (as shown above)
Yes
Check the PWB pattern between CNP801/CNW801 and IC803.
No
CNP801/CNW801 connection failure or optical pickup failure.
Yes
• Spindle motor clv servo  failure.
Is above wave obtained between pins 1 and 2 of IC803 ?
Is following wave output to the pin 41 (DMO) of IC801 when
the CD TEST MODE "STEP 3" is changed to " STEP 4" ?
No
Yes
Check the procedure in "HF ERROR".
If OK.  IC801 is faulty.
Check the PWB pattern between pin 41 (DMO) of IC801 and pins
9 and 10 of IC803.  If OK.  IC803 is faulty.
No
Is above wave obtained between pins 9 and 12 of CNP801/
CNW801 ?
Yes
Check the PWB pattern between CNP801/CNW801 and IC803.
No
CNP801/CNW801 connection failure or optical pickup failure.
Yes
DMO
Yes
1.5~2.5sec
1.5~2.5sec
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Download Sharp XL-1500 (serv.man4) Service Manual (Repair Manual)

Here you can view online or download Sharp XL-1500 (serv.man4) Service Manual in pdf. This Service Manual can help you recover, restore, fix, disassemble and repair Sharp XL-1500 (serv.man4) System. Information contained in Sharp XL-1500 (serv.man4) service manual (repair manual) typically includes:

  • Disassembly, troubleshooting, programming, maintenance, remote, adjustment, installation and setup instructions.
  • Schematics, wiring and block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Parts list (bill of materials).