Sharp MD-MS200W Service Manual page 42

MD-MS200W/MD-MS200/MD-MS200H
• Recording/playback operation
Insert a low reflection disc, and ascertain audio output by normal playback, and then set TEST REC mode.
Does the head move down, failing to start record even
when the continuous record mode is set after address?
Is RF waveform output TP145 in recording/playback mode?
Does level of pins 6 and 54 of IC401 and pin 22 of IC101
change depending on record and playback?
Is RF pattern output from IC201 pin 60 and CNS201 pin 2?
Check whether there is any damage in IC101, periphery of
Q101, and laser diode.
Check for defects of IC351 in head drive flexible PWB,
Q351 to 354, head, flexible PWB.
Is audio monitor output given in normal mode LINE IN
record?
Is waveform obtained on IC501 pins 3 and 5?
Is audio waveform observed on the pins 18 and 19 of
IC703?
Check whether input waveform is observed on the pins 5
and 6 of IC703.
No
No
Yes
Yes
No
No
Yes
Check voltage of pins 56 and 57 of IC401, pins 2, 4, 7, and 9 of
Yes
IC851, pins 12 and 13 of CNS601. Check whether disc is
record-inhibited.
Yes
Check periphery of IC401 and IC101.
No
Check for soldering failure of IC201 and CNS201.
No
Check waveforms of pins 111, 12, 14, 15 of IC501, pins 76 to
Yes
79 of IC201.
Check whether the pin 24 of IC501 and the pin 75 of IC401 are
Yes
in H state.
Check whether the pin 8 of IC701 is in H state. Check whether
No
voltage of pins 13 to 15 of IC701 changes when the Record
Volume Up/Down button is pressed
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