Panasonic SA-PMX70 - Troubleshooting Guide; No Power Troubleshooting; No Sound Troubleshooting

19
7 Troubleshooting Guide
7.1. No Power
7.2. No Sound to speaker unit (at times or all the times)
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Pin No.㩷 Voltage Value㩷㩷
㩷 㩷
㩷 㩷
㩷 㩷
㩷 㩷
㩷 㩷
㩷 㩷
㩷 㨪㩷
㩷 㩷
㩷 㩷
Table1
Table1
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Yes
Yes
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No
No
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Yes
Yes
0Q
SMPS㧔H2015㧕-MAIN㧔CN1100)
No
No power during power-on of the unit
Confirmation if AC Power from SMPS P.C.B. to Main P.C.B.
Check AC Cord and AC Inlet & replace them
Is AC Power present at the AC Inlet (P5701) ?
Is fuse (F1) on SMPS P.C.B. OK?
Check & replace Fuse (F1)
Is AC Power present at H2015 (SMPS) to CN1100 (Main)?
Replace Main P.C.B.
Is 15P wire between H2015 (SMPS) to CN1100 (Main)OK ?
Check each component on SMPS P.C.B.
Replace 15P wire
࡮ Switch between L and R speaker. If no sound continues, speakers are faulty.
࡮ Check value of resistance for speakers. (if it is пǡ speakers are faulty.)
Table2
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Yes
Yes
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No
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
Yes
Yes
Yes
Yes
No
No
No
No
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Pin No.㩷 Waveform Output㩷
㩷 4㩷
㩷 4㪄㪀㩷
㪊.㩷
㪋 㪣㩷㩿㪀㩷
㩷 )0& 㩷
Table 2
PWM singnal output(Pin28, 31, 36, 39) from D-AMP IC4200 is OK?
PWM singnal input(Pin6, 8, 16, 18) to D-AMP IC4200 is OK?
PWM singnal output(Pin27, 28, 29, 30) from D-AMP IC4100 is OK?
PWM singnal input(Pin4, 5, 8) to D-AMP IC4100 is OK?
Check sound input circuit (Tuner/CD/USB/BT P.C.B., etc.)
Replace speaker unit
Replace Main P.C.B.
Replace Main P.C.B.
Replace Main P.C.B.
Replace Main P.C.B.
No Sound from speaker unit
Check main unit or speaker is faulty.
Is sound waveform output from speaker terminal (CN4200) ?
Check connection of speaker cables and any damage/breaking with cables