Read Sony ICD-B120 (serv.man2) Service Manual online
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ICD-B120
ICD-B120
• IC BLOCK DIAGRAMS
IC506 XC9105D091MR
IC102 MM3111AWLE
• Waveforms
— MAIN Board —
1
IC703
qj
(OSC1)
0.5 V/DIV, 0.1
µ
sec/DIV
2
IC703
w;
(XI)
0.5 V/DIV, 20
µ
sec/DIV
32.768 kHz
1.1 Vp-p
8 MHz
1.3 Vp-p
5
BUFFER
DRIVER
DRIVER
PHASE
COMPENSATION
PHASE
COMPARATOR
RAMP WAVE
GENERATOR,
OSC
4
CURRENT
RIPPLE DETED
AND FB
VREF WITH
SOFT START,
CE
PWM/PFM
CONTROLER
ERROR
AMP
1
2
3
FB
VDD
CE
EXT
GND
1
BIAS
3
4
2
8
6
5
7
SHUTDOWN
BYPASS
+IN
-IN
VO2
GND
VDD
VO1
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