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MZ-E900
Note on Printed Wiring Boards: MAIN SECTION
• X : parts extracted from the component side.
•
: Pattern from the side which enables seeing.
(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.
• Main boards is four-layer printed board.
However, the patterns of layer 2 and 3 have not been
included in this diagrams.
• Replacement of IC601 used in this set requires a special
tool.
• Lead Layouts
surface
Lead layout of
CSP (chip size package)
conventional IC
Note on Schematic Diagram: MAIN SECTION
• 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
/
W or less unless otherwise
4
specified.
•
f
: internal component.
Note: The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
•
: B+ Line.
• Power voltage is dc 1.5V 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 : PLAY
• Voltages are taken with a VOM (Input impedance 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.
• Signal path.
F
: Analog
J
: Digital
• Replacement of IC601 used in this set requires a special
tool.
• The voltage and waveform of CSP (chip size package)
cannot be measured, because its lead layout is different
form that of conventional IC.
WAVEFORMS
r
1
Approx.
12 mVp-p
IC501 1 TE
VOLT/DIV : 5 mV AC
TIME/DIV : 1 µsec
2
Approx.
1.2 Vp-p
IC501 ed (RF)
VOLT/DIV : 0.5 V AC
TIME/DIV : 0.5 µsec
3
Approx.
10 mVp-p
IC501 rs (FE)
VOLT/DIV : 5 mV AC
TIME/DIV : 1 µsec
22
r
IC BLOCK DIAGRAMS
IC301 TA2131FL-EL
18
17
16
15
14
13
PW
MT
BST
BEEP
V REF
12
VREF
SW
SW
SW
11
LPF1
TC MT
19
VCC
20
ADD
INR
21
10
BST NF1
BST1
INL
22
9
LPF2
BEEP
PW
PW
BST2
23
8
BST NF2
OUTB
A
B
7
BST OUT
BEEP
24
OUTA
BST
AGC
1
2
3
4
5
6
IC501 SN761057DBT
A+B+C+D
I+J
NPP
TE
1
TON
REXT
2
CSL
Wpp-LPF
Aw+Dw
3
TON Peak
VREF
4
TON Botm
C
5
ADIP
TE
D
6
TE
TEMP
D-C
7
Tpp/Wpp
Iy
8
Ix
9
FE
Jx
10
Jy
11
ABCD
A
12
A-C
13
B
14
TON-C
15
CIG
16
CDN
17
PD-NI
18
PD-I
19
APC
PD-O
20
ADIP
ADFG
21
DVDD
22
22
ADIP-IN
44
43
S-MON
TWpp
PK/BTM
Aw
CSLO
VREF075
A-C
S-MONITOR
D-C
Malfa
Mij
AwBPF
Dw
DwBPF
42
FE
41
ABCD
AVCC
40
OFC-1
39
38
OFC-2
37
PS
36
LP
RF
35
EQ
34
AGND
33
RF
32
CCSL2
31
VC
30
VREF075
29
PEAK
PEAK/BOTM
BOTM
28
27
DGND
OFTRK
T-ON
26
25
XRST
SERIAL
24
SCK
I/F
23
SBUS
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