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VERY GOOD SERVICE.FAST ANS VERY HONEST PRICE .RHAANK HERNAN
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Thanks to this service manual I repaired my old camcorder! The manual perfectly explains how to disassemble the camcorder step by step.
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This manual is very useful because it presents the technical specifications of the cd player, including the manufacturer of the reader, this helps if you need to replace it. It also displays the settings and layout of the circuit.
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Manual was a good representation of service infomation for the EWV404. It worked well for my repair.
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Great quality copy, right what I was looking for, all I need to fix my radio.
Thanks
MD-DR470H/MD-DR480H
� Abnormal display
Is a waveform found in pins 8 to 10 of CN451 ? Is pin 2 (VCC) and pin 6 (GND) of CN451 normal ? No Check between IC401 and CN451. Check around IC401. Is a waveform found in pins 29 to 31 of IC401 ? Yes Yes No
Check the pattern and soldering of SW flexible PWB and LCD flexible PWB. If no problem is found, replace the LCD.
� Audio playback circuit
If playback time is counted but no sound is heard during continuous playback. Is an audio waveform found in pins 1 (TP721), 2 (TP722), 3 (TP723) and 4 (TP724) of J703 ? No Is there a pulse where duty varies in pins 2 and 5 of Q751, Q752, Q761 and Q762 ? No Is a pulse waveform found in pins 1, 4, 9 and 12 of IC751 and pins 1, 4, 9 and 12 of IC761 ? Are pins 2, 5, 10 and 13 of IC751 H ? Check pins 68, 69, 71 and 72 of IC201 and pin 19 of IC401. If the voltage of pin 6 of Q751 and Q752 and pin 3 of Q761 and Q762 is below 2 V when setting VOLUME to MAX, check the power supply circuit of IC813 and IC821. Check soldering of J703, the remote control and the earphones. Yes
Yes
No
� The spindle motor does not rotate.
Does a waveform appear in pins 26 and 27 of IC201 after ending the test mode AUTO2 ? Yes
No
Check the periphery of IC201.
Is a waveform found in pins 60 to 64 of IC601 ? Yes If there is no defect in soldering of IC601 and insertion of the flexible PWB, replace the spindle motor.
No
Check the periphery of IC601.
� 42 �
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