Sony M-425 - Troubleshooting; Cassette Insertion Issues; Playback and Sound Problems; Recording Problems

Should any problem persist after you have made these
checks, consult your nearest Sony dealer.
A cassette cannot be inserted.
—» The cassette is being inserted in the wrong way.
(The cassette should be inserted in the lid with the
tape side facing you.)
—» <i has been already pressed.
@ cannot be pressed.
—» There is no cassette in the cassette compartment.
—» The cassette tab has been removed.
@ or <4 cannot be pressed.
—» The tape has reached the end.
—» After the automatic shut-off, <t-=-PAUSE is slid in
the direction of the arrow...
The tape stops in the cue or review mode.
After the fast forward or rewind, the tape does
not move even though you press ~<4i.
-—» The batteries are weak.
The unit does not operate.
~~» The batteries have been inserted with incorrect
polarity.
-» The batteries are weak.
—> <texPAUSE is slid’in the direction of the arrow.
-—+ The AC power adaptor or car battery cord is
connected to the unit only and you are going to use
the unit on batteries.
_ No sound comes from the speaker.
-» The earphone is plugged in.
-» The volume is turned down completely.
Tape speed is too fast or too slow in the
playback mode.
—» Improper setting of the TAPE SPEED switch. Set it
to the same speed as that used for recording.
bea sound drops out or comes with excessive
noise.
—» The volume is turned down completely.
—» The batteries are weak.
—» The head is contaminated. See “Maintenance”.
Recording cannot be made.
—+ Connection is made incorrectly.
—» The batteries are weak.
—» The head is contaminated.
—» Improper setting of the VOR switch (M-527V/
627V /677V /727V only). Set it to H or OFF.
Recording is interrupted.
—» The VOR switch (M-527V /627V /677V /727V only)
is set to H or L. When you do not use VOR, set it to
OFF.
Recording cannot be erased completely.
-> The head is contaminated.
Tape speed is faster than the normal piayback
speed
—» The FAST PB switch (M-527V /627V /677V /727V
only) is slid in the direction of the arrow.
—» The TAPE SPEED switch is set between the 1.2 cm
and 2.4 cm positions.
e