Sony TCM-929 - Troubleshooting; Common Operational Problems

TCM-929/939
4-2. SCHEMATIC DIAGRAM
1
2
|
3
|
4
rs)
6
7
8
9g
10
11
12
en
rm
rrr
erm
rrr
ee
oe
A ' [ MAIN BOARD ]
TPtOS
103 R103
° wl 2.2K
J101 As
A iz |
PLUG
IN
POWER
Vhs)
[A
|
J102
EAR
B TP106
R101
18k =
I
SP101
SPEAKER
MIC1O1
Cc MICROPHONE TP1O1 Rize | Rize
&
|
£101
-
M901
x
(M)
REEL/CAPSTAN
104
R102
c
=
MOTOR
MTZJ-T-73-3.0 3. 3k ee
[Vote pow
0 e TC POWER
TP102 C133 PB—=REC SWITCH
D x S101-6
4 5
O in
TP105 C102 ae
HE101
190
2
(CHASSIS)
[==]
ERASE
HEAD
TP108
>
eval
=
5
:
LON
ose
f=)
© R104 oa oR + el axl LF J103
I 22k oS < eT LBF Te
: a 8 ~ | oe
3B
as
BC
IN
6V
HRP 101 ae
PLAYBACK/RECORA
HEAB
TOTAL
CURRENT
WHT
oy
PLAY:150mA
“[
7
oe
REC:150mA
“T
RED
FF:
125mA
TL
R108 6.8k Cllé + RI2 1 TP110 I REW:125mA
R106 eae TPitt
F 7.5k I
+
0.0047 X 4.7 S0V SIZE “AA‘
|
|
{TEC
BESIGNATION
Ré)
Note:
e All capacitors are in uF unless otherwise noted. pF: wuF
50 WV or less are not indicated except for electrolytics
and tantalums.
e All resistors are in Q and % W or less unless otherwise
specified.
° : B+ Line.
e Power voltage is de 6 V and fed with regulated dc power supply
from external power voltage jack.
e Voltages are de with respect to ground under no-signal
conditions.
no mark : PLAY
e Voltages are taken with a VOM (10 MQ/V).
Voltage variations may be noted due to normal! production
tolerances.
e Signal path.
>> : PB
—9— : 7 —10—