Diagrams; Ic Block Diagrams - Sony WM-EX651 Service Manual

WM-EX651
SECTION 6

DIAGRAMS

NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
For schematic diagrams.
Note:
• All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
• % : indicates tolerance.
• C : panel designation.
• A : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 1.5 V and fed with regulated dc power
supply from battery terminal.
no mark : PLAY
• Voltages and waveforms are dc with respect to ground in
playback mode.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
E : PB
• Waveforms
1
IC702 4 LX
30 Vp-p
µ
10 sec
1V/DIV, 5 µ s/DIV
2
IC701 wk XTO
1.3 Vp-p
µ
30 sec
0.5V/DIV, 10 µ s/DIV
3
IC601 5
OSC
20 mVp-p
1.5 m sec
20mV/DIV, 0.5 ms/DIV
WM-EX651
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• x : parts extracted from the conductor side.
• : Through hole.
®
• : Pattern from the side which enables seeing.
Caution:
Parts face side: Parts on the parts face side seen from
(Side A) the parts face are indicated.
Pattern face side: Parts on the pattern face side seen from
(Side B) the pattern face are indicated.

6-1. IC BLOCK DIAGRAMS

IC301 TA2123AF (EL)
36 35 34 33 32
BST
AGC
–
DET
+
CAMP SW 37
MT TC 38
BEEP 39 BEEP
AMS OUT 40
MT SW 41
PW SW 42
SWITCH
BST SW 43
F/R SW 44
PRE SW 45
PRE A
PRE B
M/N SW 46
PRE GND 47
VREF IN 48
VREF
1 2 3 4 5 6
IC601 MM1279XVBE
V 1
PW 2
MOTIVE
W
3
CONTROL
GND 4
CIRCUIT
MOTIVE/
MOTIVE
OSC 5
OSC
LOGIC
DR
6
BIAS
7
VREF
SPEED
REFERENCE
CONTROL
START 8
VOLTAGE
INVERTER
VSP
9
IN+ 10
12 12
31 30 29 28 27 26 25
24 RF IN
23 PW GND
–
22 PW OUT-R
+
PW B
21 PW OUT-C
PW A
PW C +
20 PW OUT-L
–
19 VCC
RIPPLE
18 BASE
FILTER
17 RF OUT
16 GND
COMPARATOR 15 AMS DET
14 AMS MIX
13 AMS SW
MIX
MTL DRV
7 8 9 10 11 12
20 PV
19 U
PRE DRIVER
18 PU
17 GND
16 VCC
15 FC
SOFT SWITCH
14 TC1
13 TC2
CURRENT
CONTROL
12 R1
OUTPUT
BIAS
11 OUT
–
+