LG SH2 Service Manual Download

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SERVICE MANUAL

CAUTION

BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.

Internal Use Only

2.1 ch Sound Bar

MARCH, 2016

P/NO : AFN77457385

MODEL: SH2 (SH2, SPH2B-P)

MODEL: SH2

(SH2, SPH2B-P)

Summary of Contents for SH2

Page 1: ...E MANUAL SERVICE MANUAL CAUTION BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL Internal Use Only 2 1 ch Sound Bar MARCH 2016 P NO AFN77457385 MODEL SH2 SH2 SPH2B P MODEL SH2 SH2 SPH2B P ...

Page 2: ...1 1 CONTENTS SECTION 1 GENERAL SECTION 2 CABINET MAIN CHASSIS SECTION 3 ELECTRICAL SECTION 4 REPLACEMENT PARTS LIST ...

Page 3: ...1 2 SECTION 1 GENERAL CONTENTS ESD PRECAUTIONS 1 3 HIDDEN KEY MODE 1 4 FIRMWARE UPDATE 1 5 SPECIFICATIONS 1 6 ...

Page 4: ...harges sufficient to damage ESD devices 5 Do not use freon propelled chemicals These can generate electrical charges sufficient to damage ESD devices 6 Do not remove a replacement ESD device from its protective package until immediately before you are ready to install it Most replacement ESD devices are packaged with leads electrically shorted together by conductive foam aluminum foil or comparabl...

Page 5: ... version will be output by voice through Speaker with below order You can select each version by Volume key 1 DSP 2 CHECKSUM 3 Touch IC 4 EQ ex 1 D1512222 2 4A3B 3 T1507081 4 E1511261 USB SW update Front Vol Remote control Vol for 3 seconds Remote control F Function POWER OFF Turn on all of 4 white LED During SW update 4 white LED will turn on one by one and circularly ...

Page 6: ...e automatic reset When the unit goes into the standby mode the red LED lamp will be on Will take about 2 minutes 2 Urgent Firmware update description If the function LED lamps are sequentially lighting for more than 3 minutes unplug the power After waiting all the lamps go off plug the power again and then the Urgent firmware update function will automatically restart the update After the process ...

Page 7: ...Hz 44 1 kHz 48 kHz 88 2 kHz 96 kHz Available Digital Input Audio format Dolby Digital PCM INPUTS OPT IN Digital audio in 3 V p p Optical jack x 1 PORT IN Portable in 2 Vrms 3 5 mm stereo jack x 1 AMPLIFIER RMS OUTPUT POWER Total 100 W Front 25 W x 2 4 Ω at 1 kHz THD 10 Subwoofer 50 W 4 Ω at 100 Hz THD 10 SUBWOOFER Type 1 Way 1 Speaker Impedance 4 Ω Rated Input Power 50 W Max Input Power 100 W Dime...

Page 8: ...2 1 SECTION 2 CABINET MAIN CHASSIS CONTENTS EXPLODED VIEWS 2 3 1 MAIN UNIT SECTION 2 3 2 SUBWOOFER SECTION 2 7 3 PACKING ACCESSORY SECTION 2 8 ...

Page 9: ...2 2 ...

Page 10: ...G D F H CABLE4 A47 486 485 A46 486 486 A48 A55 265 A43 C D CABLE5 CABLE6 263 485 267 TOUCH KEY LED CABLE2 CABLE1 256 257 H 300 EXPLODED VIEWS 1 MAIN UNIT SECTION NOTES THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE ...

Page 11: ......

Page 12: ...A900 2 SUBWOOFER SECTION ...

Page 13: ...801 Owner s manual 835 Wall bracket 806 Optical cable 836 Screws 900 Remote control 803 Packing Main 802 Box 804 Bag 3 PACKING ACCESSORY SECTION ...

Page 14: ... 3 12 2 SYSTEM PART 2 I2S SIGNAL 3 13 3 SYSTEM PART 3 I2C SIGNAL 3 14 WIRING DIAGRAM 3 15 BLOCK DIAGRAMS 3 17 1 SYSTEM BLOCK DIAGRAM 3 17 2 POWER BLOCK DIAGRAM 3 19 CIRCUIT DIAGRAMS 3 21 1 SMPS CIRCUIT DIAGRAM 3 21 2 MAIN AMP POWER CIRCUIT DIAGRAM 3 23 3 MAIN DSP CIRCUIT DIAGRAM 3 25 4 JACK LED TOUCH KEY CIRCUIT DIAGRAM 3 27 CIRCUIT VOLTAGE CHART 3 29 1 ICs 3 29 2 DIODES 3 29 3 CAPACITORS 3 30 4 C...

Page 15: ...PC01 P2 PGPC02 P1 PGPC03 R1 PGPC04 R2 PGPC05 T2 PGPC06 P4 VDD33IO N5 VSS33IO T1 PGPC07 P5 PGPE00 U1 PGPC08 P6 PGPE01 U2 PGPC09 P7 PGPC10 U3 PGPE03 N7 PGPE03 T3 PGPC11 P8 PGPE04 U4 VDD12CORE T4 VSS12CORE U5 VDD33USB20 T5 PUID20 T6 PUVBUS20 T7 VSS33USB20 U7 PUDP20 T8 PRTUNE20 U8 PUDN20 T9 VSS33USB20 P9 VDD12USB20 N9 VSS12USB20 U9 VDD33OSC U10 PXI U11 PXO U12 VSS33OSC T10 PDD12ALIVE T11 PTEST T13 PRE...

Page 16: ...IC702 pin14 19 25 If 3 3 V voltage doesn t come out check IC101 pin B3 D8 D9 4 Please check I2S signal of IC701 IC702 pin15 20 21 22 and Replace it 2 1 3 Service hint Any picture Remark MAIN board bottom view Schematic point R717 C712 R703 R720 R719 C711 C704 R716 C706 C707 C714 C715 C728 C735 C708 C709 R718 R713 R704 C702 R715 R714 R706 R705 C705 R702 R701 C701 NO VIA CLOS C734 C731 C733 C732 TAS...

Page 17: ...HECK Assy No P N 6870S 0036A SH2 PV MAIN 2015 11 27 D751 C926 R935 R936 C922 C921 R716 R717 C705 R129 R123 C206 R662 R661 RA100 C144 C142 R757 D752 C720 C722 C735 C712 C928 R203 R136 R664 ZD622 R19J RA102 RA104 RA101 C143 C725 RA103 R758 R704 C708 R701 R703 C927 C924 R938 R131 R132 R133 R146 R128 R106 R107 R108 R109 R105 R111 R104 R217 R221 R222 Debug Monitor CN103 R180 R19B R19A R19C R19D R19H R1...

Page 18: ...oot Countermeasure 1 Please voltage check 3 3 V of PN261 pin1 If 3 3 V voltage doesn t come out Replace IC601 2 Please check IC101 pin L1 L2 K1 K2 M2 P7 N7 signal and Replace it 3 Please check PN261 pin2 3 4 5 7 9 10 signal and Replace it 4 Check BT Module 4 1 3 Service hint Any picture Remark MAIN board top view Schematic point 0V 0V 21V 0036A option 21V CHECK Assy No 0036B P N 6870S 0036A SH2 PV...

Page 19: ...icture Remark MAIN board top view Schematic point 0V 0V 21V 0036A option 21V CHECK Assy No P N 6870S 0036A SH2 PV MAIN 2015 11 27 D751 C926 R935 R936 C922 C921 R716 R717 C705 R129 R123 C206 R662 R661 RA100 C144 C142 R757 D752 C720 C722 C735 C712 C928 R203 R136 R664 ZD622 R19J RA102 RA104 RA101 C143 C725 RA103 R758 R704 C708 R701 R703 C927 C924 R938 R131 R132 R133 R146 R128 R106 R107 R108 R109 R105...

Page 20: ... R722 C764 R721 R716 R717 C705 C625 R177 R125 R129 R123 C206 33 R662 R661 RA100 C144 C142 R757 D752 C748 C750 C726 C720 C722 C735 C712 C928 R184 R145 R147 R203 R136 R152 FB652 R ZD62 R19J C127 R176 C621 R162 R169 R182 C128 RA102 RA104 RA101 C143 C725 8 0 C612 RA103 C626 53 65 D753 C605 R769 R767 R772 R758 R732 R707 C723 C703 R733 R704 C708 R701 R703 C611 R179 R138 R139 R131 R132 R133 R146 R128 R10...

Page 21: ...162 R169 R182 C128 RA102 RA104 RA101 C143 C725 8 0 C612 RA103 C626 53 65 D753 C605 R769 R767 R772 R758 R732 R707 C723 C703 R733 R704 C708 R701 R703 C927 C924 R938 C611 R179 R138 R139 R131 R132 R133 R146 R128 R106 R107 R108 R109 R105 R111 R104 R217 R221 R222 IC106 APX809 C126 R167 R171 R180 R19B R19A R19C R19D R19H R189 C148 ZD661 R665 FB654 C606 L601 Q751 R728 C759 R727 C746 C743 PN703 C761 C757 P...

Page 22: ...G GUIDE 1 SMPS PART POWER ON Start AC In Check the F1 U1 R24 R25 R26 Voltage between pin1 2 of the CN21 is whether 21 V Please check the Main board Repair the components described above Check the RS1 R9 C8 NO NO YES Clear NO Clear ...

Page 23: ...OK Check IC604 and SMPS Check IC601 Check IC604 and SMPS Check IC501 IC101 Replace X101 Check IC501 IC603 1 2 VA OK LED 3 3 V OK IC601 M3 3 VA OK IC501 function key in touch data OK X101 24 MHz OK IC501 LED CTL OK MAIN Board TOUCH Board TOUCH MAIN Board NO NO NO NO NO NO NO YES YES YES YES YES YES ...

Page 24: ...e Check IC921 or Replace Check IC701 IC702 output stage and speaker terminal Check IC701 IC702 output stage and speaker terminal Check IC101 or Replace IC201 pin6 OPT_IN signal OK IC921 pin13 14 input signal OK IC101 D1 D2 E1 E4 I2S signal OK IC101 F1 F2 G1 G2 I2S signal OK IC101 F1 F2 G1 G2 I2S signal OK IC201 pin13 14 15 signal OK IC101 D1 D2 E1 E4 I2S signal OK NO NO NO NO NO NO NO Pairing OK Y...

Page 25: ...E00 U1 PGPC08 P6 PGPE01 U2 PGPC09 P7 PGPC10 U3 PGPE03 N7 PGPE03 T3 PGPC11 P8 PGPE04 U4 VDD12CORE T4 VSS12CORE U5 VDD33USB20 T5 PUID20 T6 PUVBUS20 T7 VSS33USB20 U7 PUDP20 T8 PRTUNE20 U8 PUDN20 T9 VSS33USB20 P9 VDD12USB20 N9 VSS12USB20 U9 VDD33OSC U10 PXI U11 PXO U12 VSS33OSC T10 PDD12ALIVE T11 PTEST T13 PREMOCON PGPE 10 T12 PRESETN P10 PGPE05 P11 PGPE06 U14 PSPDIFRX PGPE 12 T14 PEXTSRC0 PGPE 13 N11...

Page 26: ...703 R720 R719 C711 C727 R711 C718 3P 2 5mm 2P 2 5mm PN701 C704 R716 C706 C707 C714 C715 C728 C735 C708 C709 C724 R712 R709 C756 R710 C761 C757 C737 C721 C725 C726 C720 C722 4ohm R718 R713 R704 C702 R715 R714 R706 R705 C705 R702 R701 C701 C736 NO VIA CLOSE TO IC C734 C731 C733 L702 1 L701 2 L701 1 C732 L702 2 TAS5733 IC701 NO VIA CLOSE TO IC FB702 ...

Page 27: ...IC201 CS8422 7 8 FIG 3 2 TOUCH IC501 TC354K 9 10 7 8 R218 C211 C213 R221 R222 R203 C222 C225 C223 C224 C203 FB201 C202 C205 C206 R215 C221 R213 R214 R211 R212 R216 R217 R223 R224 FB221 R202 C201 9 10 L501 IC501 TOUCH_SCL TOUCH_SDA DIR_SCL DIR_SDA ...

Page 28: ...PN506 CN110 OPTICAL JACK USB JACK SVC PN501 PN502 PN502 3P WHITE RED 380 100 24 2P WHITE RED 230 100 24 4P 90 mm 2 5 mm 10P 60 mm 1 0 mm FFC 10P 110 mm 1 0 mm FFC 8P 60 mm 1 0 mm FFC 7P 130 mm 1 0 mm FFC 90 mm 1P 24 712AX BS 2 To CHASSIS MAIN PORTABLE JACK SPK WOOFER JACK PN505 PN703 CN501 2P 140 mm 2 5 mm WIRING DIAGRAM ...

Page 29: ...3 18 3 17 BLOCK DIAGRAMS 1 SYSTEM BLOCK DIAGRAM ...

Page 30: ...3 20 3 19 2 POWER BLOCK DIAGRAM ...

Page 31: ... COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT SPECIAL COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER FROM THE ACTUAL CIRCUIT USED THIS WAY IMPLEMENTATION OF THE LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE LITERATURE IS PRINTED 1 Shaded par...

Page 32: ...C761 C757 C746 C744 C737 C721 C725 C726 C720 C722 4ohm R621 R616 R939 R628 R731 R733 FB632 R718 R713 R704 C702 C765 ADD PV 16 POINT AMP CLIP DETECT CIRCUIT C618 R611 TPS563200_DD IC601 NR6045T_3R0M L602 R603 POWER PN601 100nF C926 R625 R622 C620 NR6045T_2R3M L603 C619 10uF 2 C623 R617 R614 R615 C605 R605 C607 10uF 2 C610 R608 R940 C921 C922 R911 FB653 R627 R732 C764 FB652 FB651 FB641 ZD661 R715 R7...

Page 33: ...PGPC15 M2 M1 PGPB14 N4 PGPC00 N2 PGPC01 P2 PGPC02 P1 PGPC03 R1 PGPC04 R2 PGPC05 T2 PGPC06 P4 VDD33IO N5 VSS33IO T1 PGPC07 P5 PGPE00 U1 PGPC08 P6 PGPE01 U2 PGPC09 P7 PGPC10 U3 PGPE03 N7 PGPE03 T3 PGPC11 P8 PGPE04 U4 VDD12CORE T4 VSS12CORE U5 VDD33USB20 T5 PUID20 T6 PUVBUS20 T7 VSS33USB20 U7 PUDP20 T8 PRTUNE20 U8 PUDN20 T9 VSS33USB20 P9 VDD12USB20 N9 VSS12USB20 U9 VDD33OSC U10 PXI U11 PXO U12 VSS33O...

Page 34: ... From Touch C505 From MAIN LD501 From MAIN PORTABLE IN C553 L551 OPTICAL IN PN503 BLUTOOTH LD502 LD503 LD504 IC501 PORTABLE MUTE LD505 PN502 PN508 AGNDJ JK553 JK551 PN501 From MAIN PN505 JK552 DOWN LOAD OPTION PORTABLE FUNCTION From MAIN SUB WPPFER OUTPUT SP_TERMINAL MLC3730 A2 HIGH OPTICAL BT LG TV PORTABLE MLC3730 A2 LOW OPTICAL BT LG TV MUTE L552 4 JACK LED TOUCH KEY CIRCUIT DIAGRAM ...

Page 35: ...Voltage_Spec Measure Margin C3 C4 330 pF 400 119 281 C5 68 450 335 115 C6 Peak to Peak 2200 pF 400 82 318 C7 0 1 50 1 17 48 83 C8 1000 pF 50 0 008 49 992 C9 47 50 13 59 36 41 C10 Peak to Peak 2200 pF 400 22 378 C12 0 1 50 13 33 36 67 C21 Peak to Peak 1000 pF 400 168 232 C22 1000 25 21 4 C24 1 50 14 4 35 6 C25 0 1 50 21 29 C101 2 2 16 3 32 12 68 C102 C107 C111 C112 C118 C131 C133 C143 C144 C145 C14...

Page 36: ...3 D 4 DGND 0 0 PN110 PN501 1 3V3_MICOM 3 14 3 47 3 32 2 DGND 0 0 3 TOUCH_IRQ 2 3 3 47 3 32 4 TOUCH_SDA 2 3 3 47 3 32 5 TOUCH_SCL 2 3 3 47 3 32 6 DGND 0 0 7 STBT_LED 2 3 3 47 3 31 PN506 1 3V3_MICOM 3 14 3 47 3 32 2 OPT_OUT 2 3 3 47 3 31 3 DGND 0 0 4 AGND 0 0 5 POT_R 6 AGND 0 0 7 POT_L 8 VCC55 4 65 5 35 5 14 9 D 10 D PN701 1 FR 0 0 2 FR 0 0 PN702 1 FL 0 0 2 NC 3 FL 0 0 PN703 1 Woofer 0 0 2 Woofer 0 ...

Page 37: ...3 34 3 33 PRINTED CIRCUIT BOARD DIAGRAMS 1 SMPS P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW NOTE Warning Parts that are critical with respect to risk of fire or electrical shock ...

Page 38: ...9 R105 R111 R104 R217 R221 R222 Debug Monitor CN103 IC106 APX809 C126 R167 R171 R180 R19B R19A R19C R19D R19H R189 C148 ZD661 R665 FB654 C129 C606 L601 Q756 Q751 R728 C759 R727 C746 C743 PN703 C761 C757 PN702 C174 C175 C176 C177 10 PN506 Q752 C721 C737 PN701 C752 C701 C704 IC921 PCM1808 TPS563200_DD IC601 R149 R144 R140 R148 R137 R121 R126 R124 Q121 Q122 R235 R917 R234 R232 R237 C231 R236 R233 C22...

Page 39: ... JACK P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW 33V BT MU OPT STB DGND BT_LED LED3 3V STBY_LED OPT_LED DGND A PWR DG A P GD MUTE POR Rev 2 0 PN503 SH2 PV LED 2015 11 26 P N 6870S 0039A R523 R525 R526 R524 R522 C506 To Key PN503 4 LED P C BOARD DIAGRAM TOP VIEW BOTTOM VIEW DG 33V IRQ 33V 33V DG SDA OPT SCL STB BT 3V3_MICOM TOUCH_SDA TOUCH_SCL TOUCH_IRQ DGND STBY_LED PN501 DGND LED3 3V DGND BT_LED OPT_...

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