Sony WM-10 User Manual

WM-T O WM-20
uit Operation
* Drive Circuit Operation
C607 Q603 0*06 Q604 Rotation
if reverse
ie time as
charging
OFF OFF OFF high speed relation
charging completed ON ON ON Servo applied
Symptoms Defective Parts
Tape Huns aWay. Q6Q3, Q6041 open
j short
Q6D5, Q606J between E-U
short open
C6G7
R6I0
R620
€607
€608
Stow speed, uneven rotation
0*04 short between E-C
Rotates intermittently
R6U I
FLV60! j " PGn
* Feedback Circuit Operation
Motor cannot rotate if there is no voltage here. Check that there
is approximately 0.6 V at C6G1 © . If not, check voltage at 10501
pins @ , (fi) , @ .
Symptoms. Defective Parts
Tape runs away
R*05 open
Q6 01, Q6 02 short be tween E €
Tends to run slow
0606 open
0*02 short between E—B
Slightly fast D601 open
Rotation uneven R&2.8 open
For no rotation, unsolder A phase (or 0 phase) to
make it open and rotate the motor by hand. If the
motor rotates at high speed only for B phase only,
B phase drive circuit is OK and A phase is defective.
Symptoms
Defective Parts
Slow speed
R*02, R6G&, R624
Q610, Q61), Q*| 2]
Q609,Q613 1
open
short
between E-C
Tape runs away
R&01, R6M open
• Fast, Slow Speed
FWD mode
Symptoms
Defective Parts
Fast speed R6I3, R614 \
(.TH601, R640) J 0pen
€612 short
Stow speed
R618 open
0*07 short between E-C
R.V601 hits control panel.
Slow speed, uneven
rotation
R615 open
I
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Sony WM-10 Specifications

General

Brand	Sony
Model	WM-10
Category	Cassette Player
Language	English