Aiwa-NSXVC220-cs-sm维修电路原理图.pdf

《Aiwa-NSXVC220-cs-sm维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《Aiwa-NSXVC220-cs-sm维修电路原理图.pdf（33页珍藏版）》请在收音机爱好者资料库上搜索。

1、? ! #?$?%?&!?#?!()? !*?+# ?%?,+#? ! #)?&-?./?01?2?3?&*?&4?56?77?6?584?-?9?!(?!-&?, $?&!? &$?$?,? !?,1? ! #?&-?:;?1?2?3?&*?&4?=84?RadioFans.CN 收音机爱 好者资料库 2 SPECIFICATIONSMAIN UNIT CX-NVC220TUNERFM tuning range87.5 MHz to 108 MHzFM usable sensitivity (IHF)13.2 dBfFM antenna terminals75 ohms (unbalance

2、d)MW tuning range530 kHz to 1710 kHz (10 kHz step)531 kHz to 1602 kHz (9 kHz step)MW usable sensitivity350 V/mMW antennaLoop antennaSW tuning range5.730 MHz - 17.900 MHzSW usable sensitivity 40 V/m (IEC)SW antenna Wire antennaAMPLIFIERPower outputRated : 35W + 35W (6 ohms, T.H.D.1 %, 1 kHz)Reference

3、 : 40 W + 40 W (6 ohmsT.H.D. 10 %, 1 kHz)Total harmonic distortion 0.1 % (20 W, 1 kHz, 6 ohms, DINAUDIO)InputVIDEO/AUX : 500 mVMIC : 1.0 mV (10 kohms)OutputsSPEAKERS : 6 ohms or moreVIDEO OUT : 1.0 Vp-p (75 ohms)PHONES : 32 ohms or moreCASSETTE DECKTrack format4 tracks, 2 channels stereoFrequency re

4、sponse50 Hz - 8 kHzRecording systemAC biasHeadsDECK 1 : playback x 1DECK 2 : recording/playback x 1, erase x 1DISC PLAYERLaserSemiconductor laser ( = 780 nm)D/A converter1 bit dualSignal-to-noise ratio90 dB (1 kHz, 0 dB)Harmonic distortion0.05 % (1 kHz, 0 dB)Video signalNTSC/PAL color system(selecta

5、ble)Video dataMPEG 1Audio dataMPEG 1, Layer 2 (VCD)MPEG 1, Layer 3 (MP3-CD)GENERALPower requirements120 V/220 - 230 V/240 V AC(Switchable), 50 Hz/60 HzPower consumption70 WPower consumptionWith ECO mode on : 0.6 W in standby modeWith ECO mode off : 15 WDimensions (W x H x D)260 x 323 x 291 mmWeight6

6、.0 kgFRONT SPEAKERS SX-NVC222Speaker system2 way, bass reflex (magneticshielded)Speaker unitsWoofer : 120 mm coneTweeter : 120 mm ceramicImpedance6 ohmsDimensions (W x H x D)220 x 324 x 198 mmWeight2.3 kg Design and specifications are subject to change without notice.RadioFans.CN 收音机爱 好者资料库? ? ? ? ?

7、 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?!?!#$%?&#&?%$%?()!?*(%?#&+&?*&#,-./$+!?!%#()!?#!0!)!?+!#!?!)#+#!?*&# #&/&%#(10!)+(+)(-*!%? 2? )#&0&)$? %&*?&#,?&)$)!+$1+&#$)$? !33!1!#$%? !%0&%4+? 35? !%!#? +&#? &%? 0!4? +-?+3$?6?$1!+? ? 4$%!? 71(*+!%0+%8? *!%? !%0&%4!1$%(#+&#!+? 6,1? -+%)%8? )!+$1+#15)%8? +-? ,0$1

8、+*14$181&%+$%?6,1?)!+$1*)!+?2?+$?-6?-%#1-)+?-1?!4/(+#?$%#+?-1?3$16-1?!%?$?-6?31-?$ 4(1$+? -#.$1? #.!%? #.-+$? +3$?6$4? .$1%? ?!? 1$+()#? %.!9!14-(+?1!4!#-%?$:3-+(1$?;(#)+!#-%? 4$? ?-?!%4$+? 18)!8$+? -(? 31-?4(1$+!(#1$+?=($?$(:?+3?6%$1?(%$?4!%8$1$(+$:3-+#-%?!(:?1!4!#-%+?+%)8?)!+$1+#5)%8?0$4?57%8?%51?

9、+*$1.$4+!6714$1$1(4$?!6?6(%*#-%?%485?(4+?#$)+$?6-1?+#15)%8?.+?-?3!?#?+?3)!$1?+?)!+6$4?!+?!?2?31-4(?#?.$?2?)!7$)?+?)-?!#$4?-%?#.$1$!1?$:#$1-1?2?2?2?2? ?#$ ? ? ? ? ? ? ? ?%?&?(?&?&)*?RadioFans.CN 收音机爱 好者资料库 4 NOTE ON BEFORE STARTING REPAIRCharging voltage (V)Discharging Rated power (W)Parts number(C10

10、1, 102)resistor ()25-48100387-A00-247-09049-140220587-A00-232-090Note: The reference numbers (C101, C102) of the electrolytic capacitors can change depending on the models. Be sure to check thereference numbers of the charging capacitors on schematic diagram before starting the discharging work.2. C

11、heck items before exchanging the MICROCOMPUTERBe sure to check the following items before exchanging the MICROCOMPUTER. Exchange the MICROCOMPUTER after confirmingthat the MICROCOMPUTER is surely defective.2-1. Regarding the HOLD terminal of the MICROCOMPUTERWhen the HOLD terminal (INPUT) of the MIC

12、ROCOMPUTER is “H”, the MICROCOMPUTER is judged to be operating correctly.When this terminal is “L”, the main power cannot be turned on. Therefore, be sure to check the terminal voltage of the HOLDterminal before exchange.When the MICROCOMPUTER is not defective, the HOLD terminal can also go “L” when

13、 the POWER AMPLIFIER has anyabnormalities that triggers the abnormality detection circuit on the MAIN C. B. that sets the HOLD terminal to “L”.Good or no good judgement of the MICROCOMPUTER11111Turn on the AC main power.22222Confirm that the main power is turned on and the HOLD terminal of the MICRO

14、COMPUTER keeps the “H” level or not.33333When the HOLD terminal is “L” level, the abnormality detection circuit is judged to be working correctly and theMICROCOMPUTER is judged to be good.1. Forced discharge of electrolytic capacitor of power supply blockWhen repair is going to be attempted in the s

15、et that uses relay circuit in the power supply block, electric potential is kept charged acrossthe electrolytic capacitors (C101, 102) even though AC power cord is removed. If repair is attempted in this condition, secondary defectcan occur.In order to prevent the secondary trouble, perform the foll

16、owing measures before starting repair work.Discharge procedure11111Remove the AC power cord.22222Connect a discharging resistor at an end of lead wire thathas clips at both ends. Connect the other end of the leadwire to metal chassis.33333Contact the other end of the discharging resistor to theposit

17、ive (+) side (+VH) of C101. (For two seconds)44444Contact the same end of the discharging resistor as step33333 to the negative (-) side (-VH) of C102 in the same way.(For two seconds)55555Check that voltage across C101 and C102 has decreasedto 1 V or less using a multimeter or an oscilloscope.Selec

18、t a discharging resistor referring to the following table.Fig-1MAIN C.BD101C101C1022234RadioFans.CN 收音机爱 好者资料库 5 In such a case, check also if the POWER AMPLIFIER circuit or power supply circuit has any abnormalities or not.2-2. Regarding resetThere are cases that the machine does not work correctly

19、 because the MICROCOMPUTER is not reset even though the AC powercord is re-inserted, or the software reset (pressing the STOP key + POWER key) is performed.When the above described phenomenon occurs, it can lead to wrong judgement as if the MICROCOMPUTER is defective and toexchange the MICROCOMPUTER

20、. In such a case, perform the forced-reset by the following procedure and check good or nogood of the MICROCOMPUTER.11111Remove the AC power cord.22222Short both ends of the electrolytic capacitor C113 that is connected to VDD of the MICROCOMPUTER with tweezers.33333Connect the AC power cord again.

21、If the MICROCOMPUTER returns to the normal operation, the MICROCOMPUTER isgood.Note: The reference number or MICROCOMPUTER pin number of transistor (Q110) and electrolytic capacitor (C113) can change dependingon the models. Be sure to check the reference numbers on schematic diagram before starting

22、the discharging work.2-3. Confirmation of soldering state of MICROCOMPUTERCheck the soldering state of the MICROCOMPUTER in addition to the above described procedures. Be sure to exchange theMICROCOMPUTER after surely confirming that the trouble is not caused by poor soldering but the MICROCOMPUTER

23、itself.Fig-2-2MICRO-COMPUTERMICROCOMPUTERFRONT C.BFRONT C.BVSSVDDC113*%C1131815Short with tweezers.RadioFans.CN 收音机爱 好者资料库? ?!?!? ? ?!? ?!? ?#? ? ?!? ?!? ?# ?!? ? ?!? ?!? ?!?!#?!?!#? ?# ?!? ?!? ?# ?!? ?#? ? ?!?$? ?!? ?# ?!?!#? ?!? ?!? ?!?!?%!&? ?!?&? ?!?(? ?(?!?&?(? ?(?!?(? ?(?)?!?(? ?(?)?!?(? ?(?)?

24、!?)?)?)?)?)?)?)?)?)?!?!?!?!?)?)?)?(?)?)?)?)?)?)?!?)?(?)?(?)?#?)?#?)?)?)?)?)?#?#?#?#?#?!?)?#?!?)?#?)?)?)?)?(?)?)?!?!?#?)?#?)?#?)?)?)?)? ?RadioFans.CN 收音机爱 好者资料库?!?)?#?!?)?#?!?)?#?)?#?*? ? ? ?)?#?)?#?!?%!?#?!? ? ? ? ? ? ? ? ? ? ? ? ?#&?!?#&?!?!?#?!? ?!?&? #? $? ?$?!?!?!?!?!? ?!? ?!? ?!?&?!? ?)?)?#?)?(

25、?#?!?)?! ?)?! ?)?(?)?!?)?#?)?#?)?)?#? ?)?#?)?!?)?!?)?#?!?)?!?)?(?)?(?)?#?)?)?!?)?!?)? ?!?)?)?)?)?)?!?)?(?)?!?)?!?!?)?)? ? ?)?)?!?#?)?#?%!?#? ?)?(? ?#?)?(&?#?#?$? ?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+

26、?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!?!#+?&?!?!? ? $? ? ? ? $?#?*? ?)?)?)?#?)?#?)?#?)?#?)?#?!?)?!?)?)?)?#?)?!RadioFans.CN 收音机爱 好者资料库?)?#?)?#?)?#?!?)?)?!?)?)?)?)?)?)?)?)?)?)?#?)?#?)?#?)?#?)?#?)?#?)?#?)?#?)?#?)?#?)?#?)?(?)?#?)?#?)?#?

27、)?#?)?#?)?#?)?#?)?#?)?#?!?)?#?)?#?)?#?)?!?!?)?(?!?)?(?!?!?)?)?#?)?#?)?)?#?)?#?)?#?)?#?)?)?#? ?!?)? ?!?)? ? ? ?!?&!%? ?!?)?&?#? ?&?#?)?&?!?)?&?!?(? ?(? ?)?#?!?(?)?&?!?(?!?!?&?)?(?!?!?&?#?#?&?!?!?&?!? ?)?#? ? ? ? ? ?$?)?*?)?$? ? ?$?)?*?)?$?*?*?)?(?!?!?)?)?#? ?#? ?)?)?#?#?)?)?!?!?)?)?)?(?)?(?#?)?#?Radi

28、oFans.CN 收音机爱 好者资料库?8 8AResistor CodeChip Resistor Part CodingFigureValue of resistorChip resistorWattageTypeTolerance1/16W1/10W1/8W1608212532165%5%5%CJCJCJFormLWt1.60.80.4521.250.453.21.6108118128 : A : ACHIP RESISTOR PART CODE0.55Resistor CodeDimensions (mm)Symbol1/16W10055%CJ1.00.50.35104LtW? ? ?

29、!?%?)? ? ?!?%?)? ? ?!?%?)? ? ?!?%?)?!?#?!?#?#?)?(?!$?!$? ?!? ?!? ?)?#?#?!?!?(?!?!$?!?!?(?!?!$?!?!?!? ?!?!?!? ?!?!?!? ?!?!?!? ?!?!?!? ?!?(? ? ?RadioFans.CN 收音机爱 好者资料库 10 TRANSISTOR ILLUSTRATIONE C B2SA1980GCDA1585BCCSC4115BCKTC3198GRB C E2SK360EBCEDSGB C E2SA1981YE C B2SB1370E2SB16772SD2619CC5551STC2

30、50G D S2SK2937E C B2SJ4602SK25412SA1235F2SC2714O2SC3052F2SC5345SF/S(O)CSD1306ESBT5401SBT5551KRA102SKRC102S-RTKKRC104SKRA107SRadioFans.CN 收音机爱 好者资料库 11 WIRING 1 (MAIN / FRONT / TUNER)3231302928272625242322212019181716151413121110987654321ABCDEFGHIJKLMNOPQRSTURadioFans.CN 收音机爱 好者资料库 12 SCHEMATIC DIAGR

31、AM 1 (MAIN 1 / 2)RadioFans.CN 收音机爱 好者资料库 13 SCHEMATIC DIAGRAM 2 (FRONT / DECK)RadioFans.CN 收音机爱 好者资料库 14 SCHEMATIC DIAGRAM 3 (TUNER)RadioFans.CN 收音机爱 好者资料库 15 SCHEMATIC DIAGRAM 4 (MAIN 2 / 2 : PT SECTION)RadioFans.CN 收音机爱 好者资料库 16 WIRING 2 (AMP)3231302928272625242322212019181716151413121110987654321

32、ABCDEFGHIJKLMNOPQRSTURadioFans.CN 收音机爱 好者资料库 17 SCHEMATIC DIAGRAM 5 (AMP)RadioFans.CN 收音机爱 好者资料库?18?3?DECK?SW5(CAM2)SW1(CAM1)SOL1SOL2SW2(CST1)SW3(REA)SW4(CST2)IC213IC113L H+R1SFR1TO FRONT C.B CN504(FFC504)CN11 3 5 7 9 11 2 4 6 8 10W1M1TAPEMOTORL H+E DECK C.BRadioFans.CN 收音机爱 好者资料库 19 IC BLOCK DIAGRA

33、MRadioFans.CN 收音机爱 好者资料库?RadioFans.CN 收音机爱 好者资料库? ?!? ?!?#?$?%?&?%?(?%?(?)? !?*?+,?-?+?-.?!/?!/?0?1?!%2?!(?%2?#?#!? ?3?4?5?6?)?*?+,?-?+?7?-?.,?1?7?0,?1?8?&?1?,?(?,?&?(?,?%?,?&?%?9?&?8?&?#?(?+,?-?3?8?:?$?(!(+,?-?;?!/?#?!?!?#?)?(!(?!?+?7?4?:4?-?!%?+,?-?;?5?4?5?:?*?9=?(!(?9=?+,?-?.?!?3?+?7?4?:4?-?(!(?0

34、?/%?=?!%?+,?-?/%?=?3?;?1?!?&?(!(?#?!?!?#?(!(?+,?-?#?$? ?&?! ?%(?%?5?3?)?$?0? ?$?0? ?$1,?7?RadioFans.CN 收音机爱 好者资料库?$?(,?8?&?$?8?5?$?9?4?8?4?$?(?(?(?5?&?&?$?(?(?(?5?&?&?$)?(?(?(?5?&?&?$*?2?&?$.?2?&?$0?!/?7? ?+,?-?!?:?:?+?-? ?(?1(,?7?3?;?4?;?5?!%?+,?-?;?3?$?(!(?+?-?+,?-?&?+?-)?+,?-?&?+?-*?#?+,?-?;?5?8?

35、+?-.?(?&?0?!?8?4?)1?(?(?;?8?4?A?B?C?)?( ?( ?!?8?4?)?(/!?(/!?!?8?4?)?(/!?(/!?!?8?4?)$?( ?( ?8?4?)?%?%?;?8?4?A?B?C?)?!?8?4?)*?( ?1?#?:?( ?1?+?-?).?( ?!?#?:?( ?!?+?-?)0?9?#?:?9?+?-?*1?$?9?#?:?$?9?*?!?#?:?!?+?-?*?)?#?:?)?+?-?*?*?D?#?:?*?,?+?-?*$?.? ?#?:?.? ?+?-?*?0?E(?#?:?0?E(?*)?1?#?#?:?1?#?*? (?#?:? (

36、?+?-?*.?#?:?*0,?8?&?.1,?(?8?&?5?#?&?RadioFans.CN 收音机爱 好者资料库?.?6?01?6?#?:?6?0?6?117?6?7?1?#?:?7?6?7?1?RadioFans.CN 收音机爱 好者资料库? ?!? ?#$?%&?!?$(?%&?)?*(?%&? ?+?,!-?.?+?,!-?.? ?/(0 ?!? ?1?$?%&?!?!-?/(0?2?.?3?$?+?)?$?$(?+? ?(0$?%&?!?.?$?0?+?0? ?,!-?.?3?4?/?5?,!-?.?/(? ? #$0?%&?/*? ?*$*?%& ?!?/*?2?6?!-?.?

37、7?#0$?%&?!-?!?.8?.?.?2?/(?7?*$*?%&?!-?.8?.?.?2?/*?*?+?,!-?.?+?,!-?.?/*? ?!?1?/? %&?!?!-?/*?2?.?3?$?+?)?$?$(?+?(?10 %&?!?.?$?0?+?(?,!-?.?3?4?/?5?,!-?.?/*? ?(?10? %&?/*0?1?/? %& ?!?/*0?2?6?!-?.?7?(?10? %&?!-?.8?.?.?2?/*?7?1?/? %&?!-?.8?.?.?2?/*0?#? ?+?,!-?.?+?,!-?.?/$# ?!? ?$3?$? %&?!?!-?/$#?2?.?1?$?+

38、?)?$?+? ?31?(? %&?!?.?$?(?+?1? ?,!-?.?3?4?/?5?,!-?.? ?/$0 ?!? ?/3?$? %&?!?!-?/$0?/?!9:+?3?, ?;?,!-?.?3?4?/?5?,!-?.?3$? ? *($?%&/?9?=? ?,!-?.?04?*?5?;?,!-?.? ?3$?;?7?#$?!9:+ ?!? ?/3?$? %&?!?!-?3$?!?.?.?8?4?7?2?0?!?*?$?+?)?($?.+?$? :A?,!-?.?(?BCA?,?#?D?B5E?6?6?(?!?#?!-?($?2?.?/?*1$?%&?)?$?$/?%&?/?013?

39、%&?G?/?(#?%&?RadioFans.CN 收音机爱 好者资料库? ?!?,!-?.?B?,H?$?3?4?/?5?,!-?.? ?5? ?!?2?!?!-?5?2?.?0$?%&?)?(?%&?!?BB?)?*(%&?5B+?6?!?!? %?!?,&?.?,!-?.?B?4?B?,H00$?3?4?/?5?,!-?.?%?!?&?.?!-?.? ?!?2?3?%&?6?!-?2?.?.8?.?.?8?4?6?.?5B+?,C?.?!?0? ?9?5?B?4?B?,H00$?3?4?/?5? ?!?2?0?(?%&?!?3?%&?6?!?6?3?%&?6?0?(?%&?$?!9?)?

40、0?!9?*? ?9?7?B?4?B?,H?$?3?4?/?5? ?!?2?!?7?6?$?.+?)?0?!9?(? 5B?=?9?5?7?34?/2?.?$?.+?5?!?!?2?%&?!3?%&?!?6?3?%&?$?!9?)?(?!9?6?%&?#? 5B?=?9?7?7?34?/2?.?$?.+?5?!?!?2?3?%&?!?H?!9?)?0?(?!9?RadioFans.CN 收音机爱 好者资料库? ? !?#? ?$?$? %?&?&?#?(?#?$)?*?#?&?+? ?,- ?.?&?&?&?(?/?&?&?&?/?,0?&?&?&?/?&?&?#?&?&?/?/?&?&?&?

41、1- 2?&?/?&?%?.?/?&(3?&?&(?&(?4?!?!?&?$?#?.?!?!?!?$?$?#?$?! ?%?% ?5% ?4? ?#?&?% ?6? !? !?&?&?7 ?)?&?7 )?7 ?&?&?&?,7 !?&?(?&(7 ?#?&(7 ?/?&?/?&?&?&?7 ?&(?.?5?7 ?&?$?! ?&(?.?5?7 $?&(?.?&?&?/?&?1?(?&(?&?&?/?&?7 $?&(?.?&?&?/?&?1?(?&(?&?&?/?&?7 ?/?8?9?#?&(?#?#?&(?7 ?)?&?&(7 4?&?&?&?&(7 ?$?&?&?&?&(7 )?&?7 ?

42、&?&?.?/?&?&(7 ?&?.?/?&?&(8?%?&?97 ?&?.?&?&?&?&(?7 ?%?&?&(7 ?&(?&?&?&(7 !?&?&?&?&(7 ?&(?&?&?&?&(7 4?&?&?&(7 $?&(?&?&(7 !?&?&?7 !?,1:;=RadioFans.CN 收音机爱 好者资料库?AAAAAAAAAAACBAAAAAAAADAEAAAAEFFAAZZM-3abbccaPWBPWBPWBHT-SINKFLBZG-2CABI, BOTTOMPLATE,SHIELD12345678910111213141516174018381941208111221CUSH, 11

43、-8.5-223282627282930313334353637392425253222PLATE,EARTH MICAAAAAAWIRE,BINDERWIRE,BINDERWIRE,BINDERWIRE ASSY,160 BLK 24WIRE,ASSYLUGWIRE ASSY,160 BLK 24RadioFans.CN 收音机爱 好者资料库?!? ? ?!?#$?#?#$?%?!%?%?!?&?$?&?%&?%?!?&?(?$?&?$?&#?!? ?!?#?$?$?$?$?%?$?%?&?!?$?%?$?%?!?$?%?$?$?%?#?$?%? ?$?%? ?!&?()*?+? ?+? ?

44、,?&? ?!? ?%?$?$?%?& ?$?%? ?!?#?-?-?-?&?!?#?-?-?!?&?-?(?,?*?RadioFans.CN 收音机爱 好者资料库?ATERMINAL,LB1AABTERMINAL,LB11234556678991011101112121313141415151616181819192020212130222324252627282223242526272829313233343536373738383939404142434451524546474849505354541755303529313233525144454342IC, EW732IC, EW73

45、2baabcc404146474849PWBRadioFans.CN 收音机爱 好者资料库? ?!?!? ? ?#?!?!?$?#?!?$?!?#?$?#?!? ?%?!? ?!?!?!#? ? ?#?$?$?#?#?#?!?$?&?$?$?#?$?$?!?!?!? ?#?!?$?()?!?$? ?%!?%?$?&?!?!? ?!%?$*?%!?RadioFans.CN 收音机爱 好者资料库 31 GENERAL SPEAKER DISASSEMBLY INSTRUCTIONS (FOR REFERENCE)Insert a flat-bladed screwdriver into the p

46、osition indicated by thearrows and remove the panel. Remove the screws of each speakerunit and then remove the speaker units.Type.1Type.3Type.2Type.4Fig-1Fig-2Fig-3How to Attach the PANEL, FRAttach the PANEL, FR to the PANEL, SPKR. Tap the fourcorners of the PANEL, FR with the plastic hammer to fit

47、thePANEL, FR into the PANEL, SPKR completely.123Insert a flat-bladed screwdriver into the position indicated by thearrows and remove the panel. Turn the speaker unit to counter-clockwise direction while inserting a flat-bladed screwdriver intoone of the hollows around speaker unit, and then remove t

48、he speakerunit. After replacing the speaker unit, install it turning to clockwisedirection until click sound comes out.Remove the grill frame and four pieces of rubber caps by pullingout with a flat-bladed screwdriver. Remove the screws from holewhere installed rubber caps. Insert a flat-bladed scre

49、wdriver intothe position indicated by the arrows and remove the panel. Re-move the screws of each speaker unit and then remove the speakerunits.TOOLS1Plastic head hammer2() flat head screwdriver3Cut chiselHow to Remove the PANEL, FR1.Insert the () flat head screwdriver tip into the gapbetween the PA

50、NEL, FR and the PANEL, SPKR. Tap thehead of the () flat head screwdriver with the plastichammer head, and create the clearance as shown in Fig-1.2.Insert the cut chisel in the clearance, and tap the head ofthe cut chisel with plastic hammer as shown in Fig-2, toremove the PANEL, FR.3.Place the speak