Schematic Diagram (Digital Section) - Sony ICD-R100PC Service Manual

ICD-R100PC
4-5. PRINTED WIRING BOARDS (DIGITAL SECTION)
1 2 3 4
D502
[DIGITAL BOARD] (SIDE A) [DIGITAL BOARD] (SIDE B)
OPR
R507 Q501
A
S711
R505 D502
1
3
2
D504
D503
IC505
CN702
1
LCD BACK LIGHT
5
B
S703
LCD101 S701
10
LIQUID CRYSTAL DISPLAY
15
C504
20
C
S702 R501
25
IC501
30
S712
R502
C715
34
R721
24 20 15 10 5 1
R731
D
R722
BP701
IC701
S704
ERASE
E
C709
R701
R730
R728 1 6
25 30 35 40 45 48
IC703
CN704
2 2
3 1 3 1
F
4 5
4 5
IC702
R766
11
1-673-292- (11)
SWITCH UNIT
G 02
DISPLAY MENU STOP
"PLAY/STOP
=REVIEW/– +CUE/+
– 17 –
r Semiconductor
5 6
Location
Ref. No. Location
D502 A-3
D503 B-1
D504 B-2
D701 E-2
IC501 C-4
IC505 A-2
IC701 E-2
IC702 F-1
IC703 F-2
IC704 C-5
IC706 E-5
Q501 A-2
Q503 A-2
Q701 F-5
Q702 F-6
50 45 40 35 30 26
Q703 F-1
25
51
55 20
60
IC704
15
C501
65 10
70
5
75 1
JC702
95
76 80 85 90 100
X702
C711
C726
C712
R739 IC706 FB703
5 1
CN705
R740
25 26
30
20
6 10
35
15 MAIN BOARD
A
CN703
40
C708
10
(Page 11)
45
5
1 50
C702
C701
Q701
Q702
Note on Printed Wiring Boards:
Note:
1-673-292- R703 • X : parts extracted from the component side.
• ¢ : internal component.
R704 • : Through hole.
®
11 • b : Pattern from the side which enables seeing.
(11)
(The other layers' patterns are not indicated.)
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B) pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A) parts face are indicated.
– 18 –

4-6. SCHEMATIC DIAGRAM (DIGITAL SECTION)

r Refer to page 22 for IC Block Diagrams.
– 19 –
Waveforms
r
1 4
1.3 Vp-p 3.5 Vp-p
5 MHz
REC 11 kHz
PLAY 13 kHz
VOLT/DIV : 0.5 V AC
IC704 &ª VOLT/DIV : 1 V AC
IC704 !§
TIME/DIV : 50 nsec TIME/DIV : 20 µsec
2 5
438 mVp-p 0.8 Vp-p
32.768 kHz
32.768 kHz
VOLT/DIV : 0.1 V AC
IC706 8 VOLT/DIV : 0.2 V AC
IC704 *™
TIME/DIV : 10 µsec
TIME/DIV : 10 µsec
3
3.5 Vp-p
REC 11 kHz
PLAY 13 kHz
VOLT/DIV : 1 V AC
IC704 !∞
TIME/DIV : 20 µsec
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
1
/ 4 W or less unless otherwise
specified.
• ¢ : internal component.
• U : B+ Line.
• Power voltage is dc 3V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : REC
( ) : PLAY
• Voltages and current are taken with a VOM (Input imped-
ance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
– 20 –