Read Sony ICD-MS1 Service Manual online
– 36 –
– 37 –
– 38 –
• Waveforms
– MAIN Board –
– MAIN Board –
1
IC522
5
(EXT), Q522 (Gate)
2V/DIV, 2µs/DIV
3.7 Vp-p
9.8
µ
s
4.3 Vp-p
1.3
µ
s
4.8 Vp-p
535 ns
3.3 Vp-p
264 ns
3.9 Vp-p
91
µ
s
2
IC721
6
(CLK), IC722
qj
(RTCCE)
2V/DIV, 500ns/DIV
3
IC722
uj
(XBCK)
2V/DIV, 500ns/DIV
4
IC722
<zzb
(XTAL)
1V/DIV, 100ns/DIV
5
IC722
<zb.
(SYNC)
2V/DIV, 50µs/DIV
6
Q522 (Drain)
2V/DIV, 5µs/DIV
2V/DIV, 5µs/DIV
4.2 Vp-p
9.8
µ
s
– AUDIO Board –
7
IC164
w;
(MCK), IC165
4
(OUT)
2V/DIV, 50ns/DIV
4.6 Vp-p
71 ns
8
IC164
wk
(SYC), IC165
3
(IN)
2V/DIV, 50µs/DIV
3.1 Vp-p
91
µ
s
9
IC169
2
(IN)
2V/DIV, 500ns/DIV
4.8 Vp-p
535 ns
0
IC561
4
(LX)
2V/DIV, 2µs/DIV
5.6 Vp-p
6.3
µ
s
qa
Q162 (Emitter), Q167 (Collector)
2V/DIV, 50µs/DIV
2V/DIV, 50µs/DIV
3.4 Vp-p
91
µ
s
qs
Q167 (Base)
2V/DIV, 50µs/DIV
2V/DIV, 50µs/DIV
3.9 Vp-p
91
µ
s
• IC Block Diagrams
– MAIN Board –
– MAIN Board –
IC522
XC6368A351MR
IC523, 524
XC62HR3102MR
+
–
–
1
2
3
+
–
–
VREF WITH
SOFT START,
CE
RAMP WAVE
GENERATOR,
OSC
PWM/PFM
CONTROLLER
PHASE
COMPENSATION
BUFFER,
DRIVER
5
4
VOUT
VDD
CE
GND
EXT
ERROR
AMP
PWM
COMPARATOR
+
–
–
3
OUTPUT
CONTROL
REFERENCE
VOLTAGE
4
1
2
5
CURRENT
LIMIT
NC
VIN
CE
VSS
VOUT
IC721
RTC4574JE-TP
1
2
3
4
5
6
7
8
9
10
INTERRUPTS
CONTROLLER
BUS
INTERFACE
CIRCUIT
OUTPUT
CONTROLLER
ALARM
REGISTER
SHIFT
REGISTER
DIVIDER
OSC
32.768kHz
CONTROL
REGISTER
TIMER
REGISTER
CLOCK&
CALENDER
12
11
13
14
15
16
17
18
19
20
VDD
FOUT
CEO
/AIRQ
/TIRQ
CLK
DATA
CE1
FCON
GND
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
– AUDIO Board –
IC163
NJM2072M
1
2
3
4
5
6
7
8
INPUT
GAIN CONT
AMP OUT
GND
VCC
OUTPUT1
RECOVERY
TIME CAP
TIME CAP
OUTPUT2
IC164
ML7029MBZ020
1
2
4
5
6
7
8
9
10
11
12
13
14
15
30
29
28
27
22
21
20
19
18
17
16
+
–
3
REFERENCE
VOLTAGE
A/D
CONVERTER
TXON/OFF
D/A
CONVERTER
PCM
EXPANDER
B. P. F./L. P. F.
ATTENUATOR
PCM
COMPRESSOR
20k
Ω
ATTENUATOR
+
L. P. F.
ATTENUATOR
RXON/OFF
MCU
INTERFACE
ADPCM
26
25
24
23
20k
Ω
GSX
NC
AIN–
NC
SG
NC
VA
NC
AG
NC
VFRO
NC
NC
DG
PDN
VD
BCLK
SYNC
PCMSO
PCMSI
IS
IR
PCMRO
PCMRI
NC
MCK
DEN
EXCK
DIN
DOUT
IC165
XC25A08510MR
CLKIN
VSS
VDD
CLKOUT
PHASE
DETECTOR
1/N
COUNTER
L.P.F.
VCO
1/2
BUFFER
2
1
3
4
CE
5
IC561
XC6371C402PR
IC562
XC62HR3302MR
IC563
XC62HR3102MR
IC564
XC62HR3502MR
+
–
–
3
OUTPUT
CONTROL
REFERENCE
VOLTAGE
4
1
2
5
CURRENT
LIMIT
NC
VIN
CE
VSS
VOUT
1
2
3
+
–
–
VDD
REFERENCE
VOLTAGE
SLOW
START
VLX
LIMITER
PHASE
COMPARATOR
CHIP
ENABLE
PWM CONTROL
OSC 50/100/180kHz
BUFFER
4
5
NC
VOUT
CE
VSS
LX
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