JVC-PCX270-cs-sm 维修电路原理图.pdf
《JVC-PCX270-cs-sm 维修电路原理图.pdf》由会员分享,可在线阅读,更多相关《JVC-PCX270-cs-sm 维修电路原理图.pdf(34页珍藏版)》请在收音机爱好者资料库上搜索。
1、 S E R V I C E M A N U A L MODEL : PC-X270 ( C ) AM/FM RADIO CASS CD PORTABLE SYSTEM RadioFans.CN 收音机爱 好者资料库 MATESTAR ELECTRONICS LTD. PERFORMANCE SPECIFICATIONSDate: 7 May , 2003Model : PC-X270Band: AM / FM (PLL RADIO)CD CASSETTE SystemPageTotal6 Pages GENERAL TEST CONDITIONOutput Load 3 ohm non-re
2、activeReference Output: 250 mWInput Signal Source: IRE LOOP for AM 75 ohm dummy for FMModulation : 30% 400 Hz for AM 22.5 KHz Deviation 1 KHz for FM 75KHz Modulation for FM MPXRemarks DC : 12VAC : 120V 60Hz * * * Subject to change without notice .Prepared byApproved bypage 1RadioFans.CN 收音机爱 好者资料库?
3、PERFORMANCE SPECIFICATIONSMODEL NO : PC-X270 Amplitude Modulation ( AM ) SectionTest Item Unit Nominal Limit#1#2A.01 Tuning RangeLOWKHz520+/-5HIGHKHz1710+/-5A.02 I.F. Frquency600KHzKHz450+/-5A.03 Sensitivity (AM Loop ANT.) (LOW TP)600KHzdB/m5868S/N 20dB (MID TP)1000KHzdB/m5866 (HIGH TP)1400KHzdB/m58
4、66A.04 Image Rejection1000KHzdB1400KHzdB3730A.05 S/N Ratio at 100dB/m Input600KHzdB35301000KHzdB35301400KHzdB3530A.06 I.F. Rejection(MW)600KHzdB4840A.07 AM Whistle Modulation910/1350KHz%-15A.08 Selectivity (+/-10KHz) (ACA)600KHzdB1000KHzdBA.09 AGC Figure of Merit (126dB)1000KHzdB4035A.10 Audio Respo
5、nse -6dB (AM:1000KHz)LOWHz70125HIGHKHz2K52KA.11 Distortion30% at Ref.1000KHz%1360% at Ref.1000KHz%510A.12 Modulation Hum (AC)1000KHzdB5040A.13 Overload (M=80% THD=10%)1000KHzmV/m100A.14 Min. Volume Hum and NoisemV0.71.2A.1510% THD Power(Mod:80%)(1-CH Load Only)( AC )W5A.16 Max. Vol. Audio Power Outp
6、ut (80% Mod)1000KHzWA.17 6dB Bandwidth at 20dB S/N1000KHzKHz4+/-3A.18 Auto Search Threshold600KHzdB/m60681000KHzdB/m60661400KHzdB/m6066A.19 OSC Dropout Voltage Max. Power (DC)1000KHzV8.410.8Fial Out Valtage (AC)1000KHz%70page 2? PERFORMANCE SPECIFICATIONSMODEL NO : PC-X270Frequency Modulation ( FM )
7、 SectionnTest Item Unit Nominal Limit#1#2F.01 Tuning RangeLOWMHz87.9+/-0.1HighMHz107.9+/-0.1F.02 Frequency Step200/100HzKHz F.03 I.F Frequency90.1MHzMHz10.7+/-0.09F.04 Sensitivity at -30dB S/N (MONO)90.1MHzdB/uM202898.1MHzdB/uM2028106.1MHzdB/uM2028F.05 3 dB Limit Sens98.1MHzdB1525F.06 Stereo Thresho
8、ld (Dev 75KHz)98.1MHzdB1525F.07 Overload98.1MHzdB110F.08 Image Rejection90.1MHzdB106.1MHzdB2518F.09 I.F. Rejection90.1MHzdB5040F.10 AM Suppression98.1MHzdB3024F.11 Spurious Suppression98.1MHzdBF.12 Selectivity at 98.1MHz +/-400KHz98.1MHzdBF.13 Audio Response -6dB 98.1MHzHz/KHz60/4K5100/4KF.14 Channe
9、l Separation (1KHz)98.1MHzdB3020F.15 Total Harmonic Distortion (60dB) Mono Ref.22.5KHz%13 Max Powe75KHz%1030F.16 Signal to Noise Ratio (Input 60dB)90.1MHzdB98.1MHzdB4540106.1MHzdBSTEREO S/N(INPUT 60dB) W/F B.P.F98.1MHzdB4030F.17 Auto Search Threshold98.1MHzdB2530106.1MHzdBF.18 Modulation Hum (AC)98.
10、1MHzdB4540F.19 AFC Holding Range98.1MHzKHzF.20 Min. Volume Hum & Noise98.1MHzmV0.71.2F.2110% THD Power(Dev 75KHz)(1-CH Load Only)( AC )98.1MHzW5F.22 Max Power98.1MHzWF.23 OSC Dropout Voltage Max. Power (DC)98.1MHzV8.410.8 (AC)98.1MHz%70page 3? PERFORMANCE SPECIFICATIONSMODEL NO : PC-X270AUX SCETION:
11、Test Item Unit Nominal Limit#1#2C.01 THD 10% Power Output (AC) ( 1-CH Load Only)1KHzW5C.02 Noise Level (Volume Max.)mV515C.03 Noise Level (Volume Min.)mV0.71.2C.04 Distortion1KHz%14C.05 S/N Ratio1KHzdB5545C.06 Separation1KHzdB3525C.07 Mute Effect1KHzdB5545C.08 Aux Cross Talk CD (Tuner) W/B.P.F1K/10K
12、dB5550C.09 Function Level Deference (450mV/500mV) INdB0+/-5(1KHz 0dB)CDdB0+1122.5KHz Mod.FMdB0-10(30% Mod)MWdB0-101KHz -4dB INPUTTape playdB00Recording CD -10dBTape R/PdB0+/-5C.10 Frequency Response100HzdB+-3+5/-31KHzdB002KHzdB+-1+/-310KHzdB+-1+/-3page 4? PERFORMANCE SPECIFICATIONSCD SECTION : PC-X2
13、70Test ItemsUnit NominalLimit#1#21Flat (Bass off)100HzdB0-310KHzdB+2-3Rock (Bass off)100HzdB+10+13 10KHzdB+5+1Jazz (Bass off)100HzdB-4-610KHzdB-3-5Pop (Bass off)100HzdB0-1010KHzdB0-8Classic (Bass off)100HzdB+1-510KHzdB+4-102HPS VR 50%100HzdB+10+53Frequency Response TCD-782100HzdB+3-310KHzdB+3-320KHz
14、dB+3-84Signal to Noise Ratio (Unweighted)1KHzdB60505Dynamic Range 1KHzdB60506Channel Seperation 1KHzdB45307Total Harmonic Distortion TCD-7821KHz(0dB)%25338Total Harmonic Distortion TCD-7821KHz(-10dB)%13.59Channel Unbalance TCD-7821KHzdB 310Short Access Time TCD-782Secs2411Long Access Time (Stop to T
15、R24) TCD-782444Secs51312Interruption TCD725Bum0.80.613Black DotTCD725Bum6514Finger PrintoTCD725Bum6515Output Power at 10% THD T112(AC)(1-CH Load Only)1KHzW516Max. Vol. Audio Power Output (0dB)1KHzW17Skip Test (Madonna,Bass/Surr ON)TR 17Vol.Max.NO SKIP18Min Volume Noise (SP OUT)TCD-782mV 3.519Max. Vo
16、lume NoiseTCD-782mV51220Eccentricity TCD-782um0.740.6321Vertical DeviationTCD-782mm8.610.822Dropout Voltage 0dB (DC)1 KHzV8.610.8 (AC)1 KHz%70page 5? PERFORMANCE SPECIFICATIONSCASSETTE SECTION : PC-X270Test Items TAPEUnit Nomina Limit#1#2T.01 Playback S/N Ratio (Unweighted)-12ABdB4535T.02 Playback T
17、HK-T118 (at Ref O/P)AB%13T.03 Channel Seperation (PB Only)-T141AB1KHzdB4030T.04 Track Crosstalk (PB Only)-T121AB1KHzdB4030T.05 Tape Speed Deviation-T111AB3KHzKHz4.75CM/S+-3T.06 L/R CH. DifferenceABdB0+-3T.07 Wow and Flutter-JIS weighted-T111ABP/B Only%0.35R/P-0.5T.08 Winding Time C-60 TypeABF.FewSec
18、s 170PlaySecs 170T.09 TorqueABRewindgm-cm35-70F.Fgm-cm75551KHzgm-cm7555T.10 P/R Dist. at Standard O/PA1KHz%27T.11 R/P Difference (CD-10dB 1KHz)A1KHzdB+3-3T.12 R/P Separation (W/1KHz BPF)AB1KHzdB3530T.13 R/P Cross Talk (W/1KHz BPF)AB1KHzdB4540T.14 R/P S/N Ratio (W/1KHz BPF)A1KHzdB6035T.15 R/P Erase R
19、atio (W/1KHz BPF)A1KHzdB6035T.16 R/P Channel BalanceA0+-3T.17 R/P Freq. Response 1KHz Ref125HzdB+-1+-36K3dB+-1+3/-6T.18 Min. Volume HumAPlaymV 3.5T.19 Max. Volume Hum & NoiseAmV3080T.20 Output Power at 10% THD-T112 0dB(AC)AB1KHzW5(1-CH Load Only)T.21 AC Bais FREQ.KHz65+0.5T.22 ALC Effect-65dB(-45dB
20、INPUT)ABdB05? ? ? ? ? ? ?page 6 IC &TRANSISTOR VOLTAGESMODEL : PC-X270 IC901 LA9242M(CD P/B MODE)Pin No.12345678910111213141516Voltage (v)2.572.572.612.612.552.502.552.502.502.572.572.572.502.502.702.52Pin No.17181920212223242526272829303132Voltage (v)2.502.502.502.502.5002.502.502.502.503.012.502.5
21、2.22.30Pin No.33343536373839404142434445464748Voltage (v)(play)05.0500.804.000.42.202.472.502.5602.502.610Pin No.49505152535455565758596061626364Voltage (v)(play)0.052.414.0600.024.9205.052.502.502.352.372.203.220.215.05 IC902 LC78622E(CD P/B MODE)Pin No.12345678910111213141516Voltage (v)001.4701.60
22、5.050.320.022.562.500.020.60000.051.40Pin No.17181920212223242526272829303132Voltage (v)05.05002.405.055.060000.045.050.040.042.350Pin No.33343536373839404142434445464748Voltage (v)(play)00.010.024.251.700.010.011.704.250.025.042.122.1100.10.15Pin No.49505152535455565758596061626364Voltage (v)(play)
23、0.12.500.042.501.850004.05.002.212.34000 IC903 LA6541D (CD P/B MODE)Pin No.12345678910111213141516Voltage (v)8.60.82.742.554.243.640003.804.002.562.645.058.015.00Pin No.1718192021222324252627282930Voltage (v)4.922.602.564.003.840003.963.902.562.502.568.6 IC701 LC587008 (CD P/B MODE)Pin No.1234567891
24、0111213141516Voltage (v)(stop)2.22.21.753.104.34.3004.272.204.3000.60.6Pin No.17181920212223242526272829303132Voltage (v)4.84.42.171.31.52.8904.31.72.24.64.64.81.30.050.05Pin No.33343536373839404142434445464748Voltage (v)(play)0.0504.34.32.44.31.61.5503.904.74.1000Pin No.4950515253545556575859606162
25、6364Voltage (v)(play)01.500002.22.22.22.22.22.22.22.22.22.2Pin No.65666768697071727374757677787980Voltage (v)(play)2.22.22.22.22.22.22.22.22.22.22.22.22.22.22.22.2 IC101 LA1823 (RADIO MODE)Pin No.12345678910111213141516AM Voltage (v)1.241.244.94.92.70004.84.91.241.240.54.30.360.151.26FMS Voltage (v)
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- JVC-PCX270-cs-sm 维修电路原理图 JVC PCX270 cs sm 维修 电路 原理图