Sharp XLUH260 Service Manual

XL-UH260

SERVICE MANUAL

No. S2603XLUH260/

MICRO COMPONENT SYSTEM

CONTENTS

PRECAUTIONS FOR USING LEAD-FREE SOLDER

CHAPTER 1. GENERAL DESCRIPTION

[1] IMPORTANT SERVICE NOTES ........... .......1-1

[2] SPECIFICATIONS........................................1-2

[3] NAMES OF PARTS......................................1-3

CHAPTER 2. ADJUSTMENTS

[1] CD Section....................................................2-1

[2] TEST MODE.................................................2-2

[3] Standard Specification of Stereo System

Error Message Display Contents..................2-4

[4] CD Changer Mechanism Section ................2-5

MODEL

XL-UH260 Micro Component System consisting of XL-UH260 (main unit) and CP-UH260 (speaker system).

• In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified be used.

CHAPTER 5. CIRCUIT DESCRIPTION

[1] WAVEFORMS OF SERVO CIRCUIT..............5-1

[2] VOLTAGE................................................ ......5-3

CHAPTER 6. CIRCUIT SCHEMATICS AND PARTS LAYOUT

[1] NOTES ON SCHEMA TIC DIAGRAM.............6-1

[2] TYPES OF TRANSISTOR AND LED.............6-1

[3] WIRING SIDE OF PWB/SCHEMATIC

DIAGRAM.......................................................6-2

CHAPTER 7. FLOWCHART

[1] TROUBLESHOOTING....................................7-1

XL-UH260

CHAPTER 3. MECHANICAL DESCRIPTION

[1] REMOVING AND REINSTALLING THE MAIN

PARTS..........................................................3-1

[2] DISASSEMBLY.............................................3-3

CHAPTER 4. DIAGRAMS

[1] BLOCK DIAGRAM........................................4-1

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.

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CHAPTER 8. OTHERS

[1] FUNCTION TABLE OF IC ..............................8-1

[2] FL DISPLAY..................................................8-10

Parts Guide

This document has been published to be used for after sales service only. The contents are subject to change without notice.

XL-UH260

PRECAUTIONS FOR USING LEAD-FREE SOLDER

1. Employing lead-free solder

"MAIN, POWER, SPEAKER, REFLASH MICOM, DISPLAY, USB, JACK, LED, SUB, CD MP3, SPEAKER LED PWB, CD MOTOR (PWB ONLY), CD CHANGER (PWB ONLY)" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWB and service manuals.The alphabetical character following LF shows the type of lead-free solder.

Example:

Indicates lead-free solder of tin, silver and copper.

2. Using lead-free wire solder

When fixing the PWB soldered with the lead-free solder, apply lead-free wire solder. Repairing with conventional lead wire solder may cause damage or accident due to cracks.use a dedicated soldering bit, if you are not familiar with how to obtain lead-free wire solder or soldering bit, contact

branch in your area.

As the melting point of lead-free solder (Sn-Ag-Cu) is higher than the lead wire solder by 40 C, we recommend you to use a dedicated soldering bit, if you are nto familiar with how to obtain lead-free wire solder or soldering bit, contact our service station or service branch in your area.

our service station or service

Soldering

As the melting point of lead-free solder (Sn-Ag-Cu) is about 220 C which is higher than the conventional lead solder by 40 C,and as it has poor solder wettability, you may be apt to keep the soldering bit in contact with the PWB for extended period oftime. However, since the land may be peeled of for the maximum heat-resistance temperature of parts may be exceeded, remove the bit from the PWB as soon as you confirm the steady soldering condition. Lead-free solder contains more tin, and the end of the soldering bit may be easily corrected. Make sure to turn on and off the power of the bit as required. If a different type of solder stays on the tip of the soldering bit,it is alloyed with lead-free solder. Clean the bit after every use of it. When the tip of the soldering bit is blackened during use, file it with steel wool or fine sand paper. Be careful when replacing parts with polarity indication on the PWB silk.

Lead-free wire solder for servicing

Ref No.

PWB-A 92LPWB6480MANS

PWB-B 92LPWB6480DPLS

PWB-C

PWB-D

PWB-E

PWB-F

Parts No.

92LPWB6475CDUS

92LPWB6274LEDS

QPWBF0027AWZZ

QPWBF1055AWZZ

MAIN (A1), POWER (A2), SPEAKER (A3), REFLASH MICOM (A4)

DISPLAY (B1), USB (B2), JACK (B3), LED (B4), SUB (B5)

CD MP3

SPEAKER LED

CD MOTOR (PWB ONLY)

CD CHANGER (PWB ONLY)

Description

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XL-UH260

CHAPTER 1.

FOR A COMPLETE DESCRIPTION OF THE OPERATION OF THIS UNIT, PLEASE REFER TO THE OPERATION MANUAL.

BEFORE RETURNING THE AUDIO PRODUCT

(Fire & Shock Hazard) Before returning the audio product to the user, perform

the following safety checks.

1. Inspect all lead dress to make certain that leads are not pinched or that hardware is not lodged between the chassis and other metal parts in the audio product.

2. Inspect all protective devices such as insulating materials, cabinet, terminal board, adjustment and compartment covers or shields, mechanical insulators etc.

3. To be sure that no shock hazard exists, check for leakage current in the following manner.

Plug the AC line cord directly into a 120 volt AC outlet.

* * Using two clip leads, connect a 1.5k ohm, 10 watt

resistor paralleled by a 0.15µF capacitor in series with all exposed metal cabinet parts and a known earth ground, such as conduit or electrical ground connected to earth ground.

Use a VTVM or VOM with 1000 ohm per volt, or

higher, sensitivity to measure the AC voltage drop across the resistor (See diagram).

* Connect the resistor connection to all exposed metal

parts having a return path to the chassis (antenna, metal cabinet, screw heads, knobs and control shafts, escutcheon, etc.) and measure the AC voltage drop across the resistor.

GENERAL DESCRIPTION

VTVM

AC SCALE

1.5k ohms 10W

0.15 µ F

TO EXPOSED

TEST PROBE

METAL PARTS

All check must be repeated with the AC line cord plug connection reversed.

Any reading of 0.3 volt RMS (this corresponds to 0.2 milliamp. AC.) Or more is excessive and indicates a potential shock hazard which must be corrected before returning the audio product to the owner.

CONNECT TO KNOWN EARTH GROUND

1 – 3

1 – 1

XL-UH260

[2]

SPECIFICATIONS

General

Power source AC 120 V, 60 Hz Power

consumption Dimensions Width: 6-3/4" (175 mm)

Weight 12.4 lbs. (5.6 kg)

96 W

Height: 9-1/2" (240 mm) Depth: 12-1/5" (315 mm)

Amplifier

Output power 115 watts minimum RMS per channel into 6

Output terminals Speakers: 6 ohms

Input terminals Video/Auxiliary (audio signal):

ohms from 100 Hz to 20 kHz, 10% total harmonic distortion

Headphones: 16 - 50 ohms (recommended: 32 ohms)

Subwoofer pre-out (audio signal): 200 mV/10 k ohms at 70 Hz

500 mV/47 k ohms

USB

Class Mass storage class Support File MP3/WMA (do not support DRM file) Format support FAT 16 or FAT 32 Bitrate support MP3 (32 ~ 320 kbps)

Other MP3 lD3 - tag only supports version 1.x

WMA (64 ~ 160 kbps)

USB supports version 2.0

CD player

Type 5-disc multi-play compact disc player Signal readout Non-contact, 3-beam semiconductor laser

D/A converter 1-bit D/A converter Frequency

response Dynamic range 90 dB (1 kHz)

pickup

20 - 20,000 Hz

Tuner

Frequency range FM: 87.5 - 108 MHz

AM: 530 - 1,720 kHz

Speaker

Type 2-way type light-up speaker system

2" (5 cm) tweeter

5-1/8" (13 cm) woofer

Maximum input power

Rated input power 115 W

Impedance 6 ohms

Dimensions Width: 6-1/2" (165 mm)

Weight 6.21 lbs. (2.8 kg/each)

230 W

Height: 10-1/4" (260 mm) Depth: 10-13/16" (275 mm)

1 – 4

1 – 2

[3]

NAMES OF PARTS

XL-UH260

Controls and indicators

Front panel

1. Disc Trays

2. Timer Indicator

3. Remote Sensor

4. Disc or USB Stop Button

5. Disc or USB Play or Repeat Button

6. Power ON/STANDBY Button

7. CD Button

8. Tuner (Band) Button

9. Video/Auxiliary/USB Button

10. USB Terminal

11. Headphone Jack

12. Volume Control

13. Disc Number Select Buttons

14. Disc Tray Open/Close Button

12 3 45 67

13 14

9 10 11

ANTENNA

GND

75 OHMS

VIDEO/AUX I

RIGHTLEFT

SPEAKER

RATED SPEAKER IMPEDANCE

6 OHMS MIN

AC INPUT

RIGHT

LEFT

R E

U O

U S

6 7

Display

1. Disc Number Indicators

2. MP3/WMA Folder Indicator

3. MP3/WMA Title Indicators

4. MP3 Indicator

5. WMA Indicator

6. Sleep Indicator

7. Timer Play Indicator

8. MP3/WMA Total Indicator

9. Daily Timer Indicator

10. FM Stereo Mode Indicator

11. FM Stereo Receiving Indicator

12. Memory Indicator

13. Extra Bass Indicator

14. Disc or USB Repeat Play Indicator

15. Disc or USB Pause Indicator

16. Disc or USB Play Indicator

Rear panel

1. Speaker Terminals

2. AC Power Cord

3. FM 75 Ohms Antenna Jack

4. AM Antenna Ground Terminal

5. AM Loop Antenna Terminal

6. Video/Auxiliary (Audio Signal) Input Jacks

7. Cooling Fan

8. Speaker Light-up Jacks

9. Subwoofer Pre-output Jack

Speaker system

1.Tweeter

2.Woofer

3.Bass Reflex Duct

Speaker Light-up Wire Speaker Wire 5.

1 – 5

1 – 3

XL-UH260

19 20

2221

23 24

4 5

Remote control

1. Remote Control Transmitter

2. Disc Number Select Buttons

3. Disc Direct Search Buttons

4. Equalizer Mode Select Button

5. Extra Bass/Demo Button

6. Volume Up and Down Buttons

7. Power On/Stand-by Button

8. CD Button

9. Tuner (Band) Button

10. Video/Auxiliary/USB Button

11. Disc Clear/Dimmer Button

12. Disc Random Button

13. Disc Stop Button

14. USB Stop Button

15. Memory Button

16. Disc/USB Pause Button

17. Disc Play or Repeat Button

18. USB Play or Repeat Button

19. Tuning Up Button

20. CD Track Up or Fast Forward, Tuner Preset Up, Time Up Button

21. CD Track Down or Fast Reverse, Tuner Preset Down, Time Down Button

22. Tuning Down Button

23. Display Button

24. Folder Button

25. Clock/Timer Button

1 – 6

1 – 4

CHAPTER 2. ADJUSTMENTS

[1] CD SECTION

1. CD SECTION

• Adjustment Since this CD system incorporates the following auto-

matic adjustment functions, readjustment is not needed when replacing the pickup. Therefore, different PWBs and pickups can be combined freely.

Each time a disc is changed, these adjustments are performed automatically. Therefore, playback of each disc can be performed under optimum conditions.

Items adjusted automatically

1) Offset adjustment (The offset voltage between the head amplifier output and the VREF reference voltage is compensated inside the IC.)

* Focus offset adjustment * Tracking offset adjustment

2) Tracking balance adjustment

3) Gain adjustment (The gain is compensated inside the IC so that the loop gain at the gain crossover frequency will be 0 dB.)

* Focus gain adjustment

XL-UH260

* Tracking gain adjustment

2. CD ERROR CODE DESCRIPTION

Error Explanation

10* CAM error. Can't detect CAM switch when CAM is moving. 11* When it detect cam operation error during initialize process. 20* TRAY error. Can't detect TRAY switch when TRAY is mov-

ing.

21* When it detect TRAY operation error during initialize pro-

cess.

* 'CHECKING'

If Error is detected, 'CHECKING' will be displayed instead of 'ER-CD**'. 'ER-CD**' display will only be

displayed when error had been detected for the 5 times.

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XL-UH260

[2] TEST MODE

• Setting the test mode

During stand-by mode, press STOP button while pres sing down the button and button. Then, press

the CD button to enter the test mode.

Step

C DTEST

OPEN/CLOSE operation is using manual. IL isn’t done

<< >> key input.

Laser ON.

<< >> key input.

Focus ON

<< >> key input.

CLV Servo ON

<< >> key input.

Tracking Servo ON

IL isn’t done

Step

Hold down << CD >> key for more than 2 sec.

Start Auto Adjustment at current pick-up location.

<< >> key input.

Reading Sub-code and Display

<<STOP>> key input.

STOP and return to Step

<<STOP>> key input.

STOP and return to Step

Everytime << DISPLAY >> key input

2 – 2

a) Focus Balance = FB : XX b) Focus Gain = FG : XX c) Tracking Balance = TB : XX d) Tracking Gain = TG : XX e) Focus Offset = FOFF : XX f) Tracking Offset = TOFF : XX g) RFRP = RFRP : XX

h) Focus Error (RW Judgement) = RW : XX - XX =XX i) Focus Error (Other than RW Judgement) = DA : XX - XX =XX

<<STOP>> key input.

XL-UH260

STOP and return to Step

Note

Sliding the PICKUP with<< >>, << >> button can be set in STOP mode or play mode.

During at Step , if press << >> for more than 1 sec, it directly goes to step .

To cancel: Power OFF

2 – 3

XL-UH260

[3] Standard Specification of Stereo System Error Message Display Contents

Error Contents DISPLAY Notes

CD CD Changer Mechanism Error. ‘ER-CD**’ (*) 10: CAM SW Detection NG during normal operation

11: CAM SW Detection NG during initialize process 20: TRAY SW Detection NG during normal operation 21: TRAY SW Detection NG during initialize process

Focus Not Match/IL Time Over. ‘NO DISC’

TUNER PLL Unlock.

87.50

FM MHz

(*) CHECKING: If CD changer mechanism error is detected, 'CHECKING' will be display instead of 'ER-CD**'. 'ER-CD**' display will only

be display when error had been detected for the 5

times.

Speaker abnormal detection and +B PROTECTION display

In case speaker abnormal detection or +B PROTECTION had occurred, the unit will automatically enter to stand-by mode and Timer indicator will flashing as below.

Example:In case of speaker abnormal

PLL Unlock.

FLASHING FLASHING

ON ON ON

TIMER LED OFF OFF

NO NO. 1.1

NO. 2

FRAME

OFF

OFF OFF OFF OFF

NO. 2

(REPEAT)

NO. 1 : +B PROTECTION NO. 2 : Speaker abnormal

BEFORE TRANSPORTING THE UNIT

The following process need to be taken after set tapering/parts replacement.

1. Press the POWER ON/STAND-BY button to enter stand-b y mode.

2. While pressing down the button and the button, press the button. The Micro Computer version number

will be displayed as "XL-U-****” and " FW****_V**”.

3. Turn the VOLUME KNOB until FL will display “INIT_ _MENU.”

4. Press the button until "WAIT"--> "FINISHED" appears.

5. Unplug the AC cord and the unit is ready for transporting.

2 – 4

[4] CD Changer mechanism section

• All numbers in the drawing correspond to those in parts guide (CHANGER MECHANISM PARTS).

141

XL-UH260

2 – 5

140

HALF GEAR MUST BE ARRANGED AS SHOWN

XL-UH260

139

APPLY SANKOL SHS1001 BEFORE FIX

FIX ITEM 139 ACCORDING TO THE PICTURE AS SHOWN ABOVE

ROTATE MODE BIG GEAR UNTIL REACH AS SHOWN IN PICTURE

2 – 6

XL-UH260

143

APPLY GREASE SC141

112

PULL THE LEVER UNITIL REACH THE ARROW MARK

2 – 7

XL-UH260

FIGURE 2

FIGURE 1

152

142

APPLY GREASE SC141

118

SLOT CLAMP SWITCH ARM INSIDE BASE SLOT

HALF GEAR MUST BE ARRANGED AS SHOWN

2 – 8

XL-UH260

APPLY GREASE SC141 AT BOTTOM SIDE OF GEAR FOLLOW MARKING (REFER TO GRAY AREA)

NO NEED TO APPLY GREASE AT BOTTOM SIDE

FIGURE 1

APPLY GREASE SC141 AT TOP SIDE OF GEAR FOLLOW MARKING (REFER TO GRAY AREA)

127

IF DIRECTION IS OTHER THAN DIRECTION SHOWN IN FIGURE 1, IT IS INCORRECT

CORRECT

128

INCORRECT

BLACK MARK

2 – 9

XL-UH260

APPLY GREASE SC141 AT HALF GEAR AREA

ROTATE CLOCKWISE UNTIL REACH HERE (MAXIMUM)

129

2 – 10

XL-UH260

151150149

2 – 11

XL-UH260

THE SHOWN AREAMUST FREE FROM GREASE

CORRECT

GREASE SC141 APPLICATION LENGTH

GREASE APPLICATION PORTION

INCORRECT

SHOWN HOLE MUST FACING ARROW DIRECTION

124

131

2 – 12

138

126

125

XL-UH260

APPLY GREASE SC141 AT BOTTOM SIDE ONLY

TR-RE JOINT GEAR C

2 – 13

APPLY GREASE SC141 ONLY AT TOP SIDE GEAR

MUST BE FIXED ACCORDINGLY TO THE HOLE'S

XL-UH260

148

147

146

145

2 – 14

XL-UH260

121

144

WHEN FIXING ITEM 144 MUST FOLLOW AS SHOWN

APPLY GREASE SC141

130

2 – 15

XL-UH260

117

FIGURE 2

FIGURE 1

APPLY GREASE SC141

FIGURE 3

APPLY GREASE SC141

2 – 16

XL-UH260

ITEM 133 , 134 MUST APPLY GREASE SC141 ON TOP SIDE GEAR ONLY

134

GEAR 112 GEAR 112

133

132

CORRECT

TOP VIEW AFTER BEING ASSEMBLED

INCORRECT

IT IS INCORRECT TO FIX IT IN REVERSED DIRECTION

2 – 17

XL-UH260

APPLY GREASE SC141 BEFORE FIX

MOVE 112 UNTIL TOUCH THE WALL

DURING GEAR A ROTATE MUST PRESS SHOWN AREA

AND LEVER B WILL MOVE ARROW DIRECTION THEN FIX PART 108

SCREW TORQUE

+0.5

2 kgf-cm

-0

108

803 x6

APPLY GREASE SC141

CONFIRM WHETHER FIXED PROPELY OR NOT

2 – 18

XL-UH260

APPLY GREASE SC141

113

BEHIND THE LEVER NEED TO APPLY GREASE SC141

PULL IT THEN LEVER WILL MOVE IN

2 – 19

XL-UH260

123

115

APPLY GREASE SC141

APPLY GREASE SC141 BEFORE FIX

APPLY GREASE SC141 AT BOSS

SPRING MUST BE ARRANGED UNDER THE HOOK

BOARD R

LR JOINT LEV

2 – 20

XL-UH260

IT IS INCORRECT IF ASSEMBLED IN A REVERSED DIRECTION

103

137

136

APPLY GREASE SC141

BIG SLOT MUST FACING OUT WHEN FIX AND AFTER FIXED TO BASE CHASSIS. AFTER ASSEMBLY, CONFIRM WITH FREE DROP TEST

GEAR POSITION DURING FIXING

2 – 21

XL-UH260

IT IS INCORRECT IF ASSEMBLED IN A REVERSED DIRECTION

APPLY GREASE SC141

104

135

136

BIG SLOT MUST FACING OUT WHEN FIX AND AFTER FIXED TO BASE CHASSIS

AFTER ASSEMBLY, CONFIRM WITH FREE DROP TEST

GEAR POSITION DURING FIXING

CONFIRM BOTH GEARS SIT PROPERLY AND LOCKED

2 – 22

XL-UH260

AFTER FIX OUTER UP/DOWN LEVER HOLD AS SHOWN PORTION AND MOVE UP/DOWN THEN CONFIRM WHETHER LEVER GO INSIDE THE HOLE OR NOT

120

137

119

BIGGER SLOT FACING OUT

135

BIGGER SLOT FACING OUT

IT IS CORRECT IF THE LEVER HOLD ENTERS THE HOLE

IT IS INCORRECT IF THE LEVER HOLD DOES NOT ENTER THE HOLE

ALL OF THIS 135 AND 137 GEAR FIX TOGETHER WITH 119 AND 120 LEVER ( MOVE TOGETHER )

2 – 23

XL-UH260

BIGSLOTFACINGOUT

110

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