DOWNLOAD Sharp XL-35 (serv.man18) Service Manual ↓ Size: 53.87 KB | Pages: 6 in PDF or view online for FREE

Model
XL-35 (serv.man18)
Pages
6
Size
53.87 KB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System / Troubleshooting
File
xl-35-sm18.pdf
Date

Sharp XL-35 (serv.man18) Service Manual ▷ View online

– 31 –
XL-35H
TROUBLESHOOTING
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 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.
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.
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 earller 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 players or on computer CD ROM drives.
 All rights reserved.  Unauthorized duplicating, broadcasting and renting this product is prohibited by law.
Cleaner Liquid
Cleaning Disc
PARTS CODE: UDSKA0004AFZZ
XL-35H
– 32 –
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 59 (MRST) of IC701 and pin
18 (/RST) of IC801.
No
Is +5V applied to pin 18 (/RST) of IC801?
Yes
Is CD Lid switch SW801
ON condition ?
No
Does the CD TEST MODE advance from "STEP 2"?
Yes
Check the between pattern IC701 and SW801 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 34 of IC801 in CD TEST MODE "STEP 5"?
Check the procedure "HF ERROR".
Yes
No
No
No
No
Check the pattern between pin 58 (PUIN) of IC701 and
CNW803/CNS803.
Check the between CNW803/CNS803 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 (PUIN) of IC701 and
CNW803/CNS803. Check the between CNW803/
CNS803 and PICKUP-IN switch.
No
Yes
Is "Er-CD01" displayed?
Check the procedure in "HF ERROR".
Yes
Yes
Does the unit play in order in the FF mode?
Check the procedure in "TRACK SEARCH FAILURE".
Yes
Does playback continue for 30 seconds after the start of
playback ?
Check the procedure in "SLED SERVO FAILURE".
Yes
Normal
No
No
Yes
– 33 –
XL-35H
• Focus failure.
Does the optical pickup move up and down when the disc is
removed?
Is the following waveform output at the pin 32 (FE) of IC801
when the disc is set? (See Fig.15-1)
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 CNW802/CNS802. Is it normal?
IC802 is faulty.
• Laser failure.
Yes
No
Does the laser come on when pattern cut between pin 24 of IC802
and pin 40 of IC801 ?
Check the PWB pattern between IC701 and IC801 (MCLK/MLD/
MDATA/BL)
Yes
Yes
No
Check the peripheral parts of IC802 and Q801. If it is normal, the
optical pickup is faulty.
No
Check CNW802/CNS802. If it is normal, the optical pickup is
faulty.
Is approx. 2V applied to the collector of Q801.
Is +6.2V applied to the emitter of Q804 ?
Is +5V applied to the collector of Q804 ?
Yes
No
No
Check the PWB pattern between pin 5 of CNS605 and emitter of
Q804.
Check the peripheral parts of IC804 and Q804.
Is +5V applied to the pin 4 (DVDD1) of IC802 ?
Is +5V applied to the pin 3 (VCC) of IC802 ?
Yes
No
No
Check the PWB pattern between collector of Q804 and pin 4 of
IC802.
Check the PWB pattern between collector of Q804 and pin 3 of
IC802.
Yes
Yes
Is 0V applied to the pin 40 of IC801 ?
XL-35H
– 34 –
• Focus servo sawtooth wave failure.
Is +6.2V applied to the pins 21 and 22 (VCC) of IC804 ?
 
Is sawtooh wave output to the pin 28 (FOO) of IC801 ?
IC801 is faulty.
No
Yes
Yes
Is sawtooth wave obtained between pins 26 and 27 of IC804 ?
No
No
Check the PWB pattern
between pin 7 of IC804
and pin 60 (CD STB) of
IC701.
Is +5V applied to the pin 7
(MUTE) of IC804 ?
Check the PWB pattern between pin 28 (FOO) of IC801 and pins
24 and 25 of IC804.  If OK.  IC804 is faulty.
Check the PWB pattern between pin 5 of CNS605 and IC804.
No
Is sawtooth wave obtained between pins 3 and 4 of CNW801/
CNS801 ?  (as shown above)
Yes
Check the PWB pattern between CNW801/CNS801 and IC804.
No
CNW801/CNS801 connection failure or optical pickup failure.
Yes
• Spindle motor clv servo  failure.
Is above wave obtained between pins 9 and 10 of IC804 ?
Is following wave output to the pin 11,12 of IC804 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 24,25 of IC801 and pins 9
and 10 of IC804.  If OK.  IC804 is faulty.
No
Is above wave obtained between pins 5 and 6 of CNW801/
CNS801 ?
Yes
Check the PWB pattern between CNW801/CNS801 and IC804.
No
CNW801/CNS801 connection failure or optical pickup failure.
Yes
VO2
Yes
1.5~2.5sec
1.5~2.5sec
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Sharp XL-35 (serv.man18) Service Manual ▷ Download

  • DOWNLOAD Sharp XL-35 (serv.man18) Service Manual ↓ Size: 53.87 KB | Pages: 6 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the Sharp XL-35 (serv.man18) in PDF for free, which will help you to disassemble, recover, fix and repair Sharp XL-35 (serv.man18) System. Information contained in Sharp XL-35 (serv.man18) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.