GrundigSC420 维修电路图、原理图.pdf

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1、Sono Clock 420 Service Document Exchange Set Es gelten die Vorschriften und Sicherheitshinweise gem dem Service Manual Sicherheit, Material- nummer 72010 800 0000, sowie zustzlich die eventuell abweichenden, landesspezifischen Vor- schriften! The regulations and safety instructions shall be valid as

2、 provided by the Safety Service Manual, part number 72010 800 0000, 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 Made by GRUNDIG in Germany E-BS31 070

3、0 S Service Manual Sicherheit Safety Materialnr./Part No. 72010 800 0000 ? SonoClock 420 Alignment Information Model : GRUNDIG SC420 Ref. No. : SC420 Date : 21-Jan-00 A) FM Radio section 1)FM IF INPUTSIGNALOUTPUTSET RADIOADJUSTADJUST FORREMARK TP3,210.7MHzTP5,2Quiet PointT1,2Max. o/p symmetricalVol.

4、 at min. position 2)RF VOLTAGE BANDSIGNALOUTPUTSET RADIOADJUSTADJUST FORREMARK FM- -TP4,287.5MHzL21.9 2 .1Vhigh end 7.5 8V 3)FM RF INPUTSIGNALOUTPUTSET RADIOADJUSTADJUST FORREMARK TP1,290MHzSpeaker90MHzL1Max. o/pVol. at max. position TP1,2106MHz“ “106MHzTC1“ “ “ 4)75KHZ CRYSTAL OUTPUTADJUSTADJUST FO

5、RREMARK TP6,7TC275K 1HZ Note : 1.Use digital meter to measurement each required voltage on above items 2.Use weak signal in RF alignment 3.Radio & LCD board must be connected before alignment 4. Use the frequence counter to measurement each required frequence on about items. SonoClock 420 SonoClock

6、420 SonoClock 420 SonoClock 420 SonoClock 420 SonoClock 420 SonoClock 420 SonoClock 420 SonoClock 420 VOLTAGE TABLE OF MODEL : GRUNDIG SC420 (UNITS = VOLTS) DATE : 21 Jan 00 COMPONENTS : ICS IC 1, TA7358APIC 3, LM820 AT POWER ON CONDITIONAT POWER ON CONDITION PIN NO.V-OUT (Volts)PIN NO. V-OUT (Volts

7、) 10,9310,64 21,6420,56 35,130,002 41,640 5056,1 65,1611,6 74,41711,5 85,0786,9 95,1 IC 2, LA1260 IC 4, S-80720AL AT POWER ON CONDITIONAT POWER ON CONDITION PIN NO.V-OUT (Volts)PIN NO.V-OUT (Volts) 11,5112,03 21,5219,15 31,530 40 54,74 64,6 70,64 81,43 91,44 101,5 111,34 123,22 130 140 152,36 161,8

8、SonoClock 420 VOLTAGE TABLE OF MODEL : GRUNDIG SC420 (UNITS = VOLTS DATE : 21 Jan COMPONENTS : ICS IC 5, T-9512-1 AT POWER ON CONDITION (V-OUT = Volts or Milli-Volts (mV) PIN NO.V-OUTPIN NO. V-OUTPIN NO. V-OUT 10213,8411,9 20223,2424,7 34,75233,2431.7mV 40243,2441.7mV 54,73253,2 64,75263,2 74,74273,

9、2 84,74284,7 91,8291.5mV 103,26301.4mV 113,25311.5mV 123,25322,45 133,25331.7mV 143,253423mV 153,23354,72 163,23362,42 174,72370 183,25380 193,25394,7 203,25402,18 SonoClock 420 VOLTAGE TABLE OF MODEL : GRUNDIG SC420 (UNITS = VOLTS) DATE : 21 Jan 00 COMPONENTS : TRANSISTORS MEASURED CONDITION : AT P

10、OWER ON Q19018FQ89014CQ269014C C5,26C0,56C0 B3,33B0,5B0,35 E2,64E0E0 Q29018FQ99014C C2,52C10,9 B0,76B0,56 E0E0 Q39014CQ108550 C0,028C5,38 B0B10,9 E0E11,5 Q49018FQ129013 C0C1,36 B0B0 E0E0,2 Q59012HQ139014C C0,025C2 B0,64B1,02 E0,001E0,53 Q69012HQ149014C C11,5C2 B10,8B0,53 E11,6E0 Q79014CQ249012H C0,14C4,2 B0,7B4,61 E0E5,36 SonoClock 420