Tandy Radio Shack Realistic PRO-2004 Service Manual page 23

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Symptom
Cause/Remedy
9) No sound in AM mode but NFM,
1) Defective ICS02 or ICS03: Replace.
WFM operate.
2) Defective Switch ing circuit consists of 029, D40, D4S: Replace the
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defective components.
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3) Defective AN L, AF Pre Amp. circuit consists of D32, 022 : Repface
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the defective components.
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4) Defective AM IF DET. circuit consists of 016, Q17, D31 : Replace
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the defective components.
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10) No sound in NFM mode but AM, 1) Defective ICS02 or ICS03: Replace.
WFM operate.
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2) Defective Switching circuit consists of 028, D46: Replace the
, defective components.
11) No sound in AM
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NFM MODE 1) Defective IC2 : Replace. •
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but WFM operate.
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12) No sound in WFM mode but AM, 1) Defective ICS02, S03 or IC1: Replace.
NFM operate. 2) Defective Switching circuit consists of 027, D47 : Replace the defective
components.
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13) Low sensitivity between 2S.0000 to
1) Defective DECODER $WITCHING circuit consists of ICSOl, QS01 :
39.99S0 MHz. Replace the defective components.
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2) Defective Bandpass filter IS.P.F) : Replace the defective components.
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14) Low sensitivity between 40.0000 to
1) Defective DECODER SWITCHING circuit consists of ICSOl , OS02:
. 67.99S0 MHz.
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Replace the defective components.
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2) Defective a.p.F: Replace the defective components.
lS) Low sens itivity between 68.0000 to 1) Defective DECODER SWITCHING circuit consists of ICSOl, OS03:
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107.99S0 MHz. Replace the defective components.
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2) Defective a.p.F: Replace the defective components.
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16) Low sensitivity between 1) Defective DECODER SWITCHING circuit consists of ICSOl, OS04:
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108.0000 to 173.99S0 MHz. Replace the defective components.
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2) Defective a .p.F: Replace the defective components.
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17) Low sensitivity between 1) Defective DECODER SWITCHING circuit consists of ICSOl , OSOS: ,
174.0000 to 279.99S0 MHz. Repface the defective components.
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2) Defective a.p.F: Replace the defective components.
18) Low sensitivity between 1) Defective DECODER SWITCHING circuit consists of ICSOl, OS06:
280.0000 toS20 .0000 MHz. Replace the defective components.
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2) Defective a.p .F: Replace the defective components. :
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19) Low sensitivity between 1) Defective DECODER SWITCHING circuit consists of ICSOl, OS07:
760.0000 to 1300.0000 MHz. Replace the defective components.
2) Defective a.p.F : Replace the defective components.
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20) Does not operate between Defective ICS03 port PlO, ICS02, 031S and/or VCO-l circuit:
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2S.0000 to 220.49S0 MHz or Replace the defective components.
760.0000 to 10S2.49S0 MHz.
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