Sony ICD-55 Service Manual page 9
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Also See for ICD-55:
- Operating instructions manual (44 pages) ,
- Specifications (2 pages) ,
- Operating instructions manual (44 pages)
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• Waveforms
– MAIN Board –
1 IC101 @™ MCK, IC104 4 CLK OUT
6 IC701 &ª X2 (REC/PB mode)
(REC/PB mode) 1 V/DIV, 50 ns/DIV
1 V/DIV, 50 ns/DIV
3.4 Vp-p
3.5 Vp-p
200 ns
95 ns
2 IC101 @ª RSYNC, #º XSYNC
7 IC701 *™ XT1 (REC/PB mode)
(REC/PB mode) 1 V/DIV, 50 µs/DIV
1 V/DIV, 10 µs/DIV
2.4 Vp-p
3.4 Vp-p
123.5 µ s
30.6 us
3 IC705 1
8 IC703 1 32KOUT (REC/PB mode)
1 V/DIV, 50 µs/DIV
1 V/DIV, 10 µs/DIV
2.5 Vp-p
3.3 Vp-p
123.5 µ s
30.6 µ s
4 IC705 2
9 IC703 6 INTR (REC/PB mode)
1 V/DIV, 50 µs/DIV
1 V/DIV, 100 ms/DIV
4.3 Vp-p
3.4 Vp-p
123.5 µ s
500 ms
5 IC705 5
0 IC703 8 OSCOUT (REC/PB mode)
1 V/DIV, 50 µs/DIV
200 mV/DIV, 10 µs/DIV
3.4 Vp-p
1.1 Vp-p
30.5 µ s
123.5 µ s
– 14 –
• IC Block Diagrams
IC101 MSM7590L-01TS-K
!¡ IC502 4 LX (REC/PB mode)
1 V/DIV, 5 µs/DIV
AG
1
REFERENCE
SG
2
POWER SUPPLY
AIN1+
3
+
–
AIN1–
4
3.4 Vp-p
GSX1
5
AIN2
6
–
+
GSX2
7
10.4 µ s
!™ Q502 Base (REC/PB mode)
8
VFRO
200 mV/DIV, 5 µs/DIV
PWI
9
AOUT– 10
712 mVp-p
AOUT+ 11
–1
SAO+ 12
+1
SAO– 13
–1
10.4 µ s
!£ Q502 Collector (REC/PB mode)
PDN/RESET 14
1 V/DIV, 5 µs/DIV
VOXI 15
VDD 16
4.1 Vp-p
10.4 µ s
!¢ IC501 4 LX (REC/PB mode)
IC104 XC25A08510MR
1 V/DIV, 5 µs/DIV
CE
CLKOUT
5
4
BUFFER
3.9 Vp-p
1/2
VCO
L.P.F.
10.4 µ s
PHASE
DETECTOR
1/N
COUNTER
1
2
3
VSS
VDD
CLKIN
IC102 NJM2076M (TE2)
POWER
INVA IN
1
AMP
32
DG
POWER
NON INVB IN
2
AMP
BCLK
31
VDD
3
30
XSYNC
BASE B
4
29
RSYNC
PCM
ADPCM
ENCODER
ENCODER
PCMSO
28
27
PCMSI
P/S
IS
26
or
S/P
ATT
DTMF/
OTHERS TONE
GENERATOR
ATT
PCM
ADPCM
25
IR
DECODER
DECODER
24
PCMRO
23
PCMRI
CLOCK,
BACK-GROUND
TIMING
NOISE
22
MCK
GENERATOR
GENERATOR
21
DEN
CPU
20 EXCK
INTERFACE
19 DIN
18 DOUT
VOICE
17 VOXO
DETECT
IC501 XC6372C331PR
IC502 XC6372D351PR
SLOW
START
5
VLX
REFERENCE
LIMITER
VOLTAGE
NC
1
VDD
PWM/PFM
PHASE
4
BUFFER
CONTROL
COMPARATOR
VOUT
2
OSC 100kHz
–
+
CHIP
CE
3
ENABLE
– 15 –
IC703 RS5C348A-E2
8
BASE A
32 kHz
32KOUT
1
ALARM W REGISTER
OUTPUT
COMPARATOR
7
A OUT
CONTROL
(WEEK, MIN, HOUR)
W
VSS
6
ALARM D REGISTER
COMPARATOR
5
B OUT
(MIN, HOUR)
D
TIMER COUNTER
SEC, MIN, HOUR, WEEK,
DAY, MONTH, YEAR
SCLK
2
ADDRESS
ADDRESS
REGISTER
DECODER
SO
3
I/O
CONTROL
SHIFT
SI
4
INTERRUPT
REGISTER
CONTROL
VOLTAGE
VSS
5
DETECT
VSS
LX
VDD
10
VDD
9
OSCIN
DIVIDER
DIV
OSC
CORRECTION
8
OSCOUT
OSC
DETECT
7
CE
6
/INTR
– 16 –
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