GrundigSC620LED 维修电路图、原理图.pdf

《GrundigSC620LED 维修电路图、原理图.pdf》由会员分享，可在线阅读，更多相关《GrundigSC620LED 维修电路图、原理图.pdf（14页珍藏版）》请在收音机爱好者资料库上搜索。

1、ab Seriennummer 059398 from serial number 059398 on Service Document Exchange Set Es gelten die Vorschriften und Sicherheitshinweise gem dem Service Manual Sicherheit, Material- nummer 720108000000, sowie zustzlich die even- tuell abweichenden, landesspezifischen Vorschrif- ten! The regulations and

2、safety instructions shall be valid as provided by the Safety Service Manual, part number 720108000000, as well as the respective national deviations. S Dieses Service Dokument ist nur in Datenform verfgbar This Service Document is only available as data nderungen vorbehalten/Subject to alteration Ma

3、de by GRUNDIG in Germany E-BS-SA 0502 S Service Manual Sicherheit Safety Materialnr./Part No. 720108000000 ? Sono Clock 620 LED ? 1 Alignment Information Model : GRUNDIG SC620 Ref. No. : SC620 Date : 21-Jan-00 A) FM Radio section 1)FM IF INPUTSIGNALOUTPUTSET RADIOADJUSTADJUST FORREMARK TP3,210.7MHzT

4、P5,2Quiet PointT1,2Max. o/p symmetricalVol. at min. position 2)RF VOLTAGE BANDSIGNALOUTPUTSET RADIOADJUSTADJUST FORREMARK FM- -TP4,287.5MHzL21.9 2 .1V high end 7.5 8V 3)FM RF INPUTSIGNALOUTPUTSET RADIOADJUSTADJUST FORREMARK TP1,290MHzSpeaker90MHzL1Max. o/pVol. at max. position TP1,2106MHz 106MHzTC1

5、4)75KHZ CRYSTAL OUTPUTADJUSTADJUST FORREMARK TP6,7TC275K_ 10HZ 5) 4.332MHZ CRYSTAL OUTPUTADJUSTADJUST FORREMARK TP8,9TC34.332M_ 10HZ Note : 1.Use a digital meter to measure each required voltage on above items 2.Use weak signal in RF alignment 3.Radio & LCD board must be connected before alignment 4

6、. Use the frequence counter to measure each required frequency on above items. SonoClock 620 LED ? SonoClock 620 LED ? SonoClock 620 LED ? SonoClock 620 LED ? SonoClock 620 LED ? SonoClock 620 LED ? SonoClock 620 LED ? SonoClock 620 LED ? SonoClock 620 LED ? VOLTAGE TABLE OF MODEL : GRUNDIG SC620 (U

7、NITS = VOLTS) DATE : 21 Jan 00 COMPONENTS : ICS IC 1, TA7358APIC 3, KA2201 AT POWER ON CONDITIONAT POWER ON CONDITION PIN NO.V-OUT (Volts) PIN NO. V-OUT (Volts) 10,53 10,64 21,24 20,6 35,38 30 41,23 40 50 56,16 65,36 611,65 74,72711,5 85,3386,91 95,36 IC 2, LA1260 IC 4, 78L12 AT POWER ON CONDITIONAT

8、 POWER ON CONDITION PIN NO.V-OUT (Volts)PIN NO.V-OUT (Volts) 11,54118,95 21,5420 31,54312,15 40 54,95 64,69IC 5, BU2614 70,65AT POWER ON CONDITION 81,57PIN NO. V-OUT (Volts) 91,4512,64 101,5421,82 111,4130,06 123,445,01 13050,08 14-2,4560 152,4175,32 162,2885,32 90,01 100 110 122,58 135,46 145,46 15

9、0,56 160 SonoClock 620 LED ? VOLTAGE TABLE OF MODEL : GRUNDIG SC620 (UNITS = VOLTS) DATE : 21 Jan 00 COMPONENTS : ICS IC 6, SAA6579T AT POWER ON CONDITION PIN NO.V-OUT (Volts) 14,58 21,8 32,29 42,28 54,58 60 72,27 82,34 90 100 110 124,57 132,29 142,32 152,29 162,29 IC 8, T98F1 AT POWER ON CONDITION

10、(V-OUT = VOLTS) PIN NO.V-OUT PIN NO.V-OUT PIN NO.V-OUT PIN NO.V-OUT 11,49211,51414,99614,99 21,49221,51424,99624,99 31,51231,51432,15633,64 41,51241,51441,6644,7 51,49255450,16654,73 61,52263,01460664,74 71,52272,02470674,75 81,5281,01484,99684,82 91,49290490691,5 101,5300500701,5 111,5310510711,51

11、121,48320524,99721,49 131,49330530731,5 141,51340544,99741,5 151,5350551,48751,35 161,5360562,54761,5 171,51374,99574,99771,5 181,5380,05582781,5 191,51395592,89791,5 201,5405604,99800 SonoClock 620 LED ? VOLTAGE TABLE OF MODEL : GRUNDIG SC620 (UNITS = VOLTS) DATE : 21 Jan 00 COMPONENTS : TRANSISTOR

12、S MEASURED CONDITION : AT POWER ON Q19018FQ89014CQ19902H C5,32C0,55C1,05 B3,41B0,5B3,37 E2,7E0E3,4 Q29018FQ99014CQ209013 C2,5C10,96C10,1 B0,77B0,55B4,04 E0E0E3,4 Q39014CQ108550Q219014 C0C5,68C0,05 B0B11,07B0,57 E0E11,7E0 Q49018FQ129013Q249012H C0C0C5,64 B0B0B4,91 E0E2,85E5,67 Q59012HQ139014CQ25A10156R C0C1,47C4,98 B0,6B0,55B1,02 E0E0E4,99 Q68550Q169014CQ269014C C11,68C0,3C0 B10,82B0B0,07 E11,72E0E0 Q79014DQ189013Q359014C C0,1C1,05C4,99 B0,7B0,35B5,24 E0E0E4,58 Q379014C C5,23 B0,11 E0 SonoClock 620 LED ? SonoClock 620 LED