SPP-A941
– 23 –
– 24 –
5-5.
PRINTED WIRING BOARD – BASE RF Board –
Caution:
Pattern face side:
Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Side A)
the parts face are indicated.
5-4.
NOTE FOR PRINTED WIRING BOARDS
AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram:
• 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.
•
f
: internal component.
•
4
: printed coil.
•
C
: panel designation.
•
U
: B+ Line.
•
H
: adjustment for repair.
• Power voltages are dc 9 V and fed with regulated dc power
supply from external power voltage jack (J8) on the BASE
MAIN board, dc 12 V and fed with regulated dc power
supply from modular jack (J7) on the BASE MAIN board
with 100
Ω
in series, and dc 3.6 V and fed with regulated
dc power supply from battery terminal on the HAND MAIN
board.
• Voltages and waveforms are dc with respect to ground in
test mode.
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
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.
N
: RX
O
: TX
P
: BELL
• Semiconductor
Location
Ref. No.
Location
D1
B-1
D2
B-1
D3
C-2
D5
E-2
Q1
B-2
Q2
C-4
Q3
E-3
Q4
F-3
Q8
B-2
Q9
C-3
U1
D-2
U10
C-1
Note on Printed Wiring Board:
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
x
: parts mounted on the conductor side.
•
W
: indicates side identified with part number.
•
z
: Through hole.
•
f
: internal component.
•
b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
•
: connected by carbon pattern.
BASE RF BOARD
(SIDE B)
BASE RF BOARD
(SIDE A)
00
00
35-4396-03-
35-4396-03-
R35
R34
C13
C12
C54
C51
C55
C79
C78
C74
C89
C27
C22
C37
C19
C18
C38
C58
C3
C1
C14
C17
C66
C8
C56
C57
C6
R33
R29
R40
R38
R5
R6
R7
R41
R57
R50
R52
R67
R12
R19
R179
R27
R66
C77
R47
R68
R28
C60
C81
C11
C63
C2
C4
C15
C16
C67
C69
C70
C72
C71
C65
C64
C36
C35
C21
C34
C9
C7
C5
C52
C59
C82
C76
C25
C28
C39
R54
R21
R16
R14
R53
R51
R61
C146
C147
C95
R17
R15
C30
C32
C29
C31
R48
R150
C23
C26
C85
C86
C24
C42
C33
C84
C83
R30
R2
R3
R32
R4
R25
R8
R37
R9
R39
R45
R10
R20
R13
R31
R58
F1
1
3
2
U10
D3
A
K
D1
D2
A
A
K
K
8
1
16
14
15
28
1
9
L13
U1
D5
A
K
Q3
B C E
Q4
B C E
Q2
Q1
EC
B
EC
B
Q8
B C E
B
C
E
E
1
1
3
2
2 3
4
5
6
F3
F2
(SHIELD CASE)
TP (ANT)
L1, 2
(PRINTED COIL)
L2
L1
ANT1
L6
L8
L7
L5
L16
L18
L4
L19
L20
L3
L9
L10
(SHIELD CASE)
L3-10, 16, 18-20
(PRINTED COIL)
C43
C40
C99
1
12
F5
F4
L12
Q9
05
1
2
3
4
5
6
7
8
A
B
C
D
E
F
A
BASE MAIN BOARD
J2
(Page 28)
Summary of Contents for SPP-A941 - Cordless Telephone With Answering System
Page 3: ... 3 SECTION 1 GENERAL This section is extracted from instruction manual ...
Page 4: ... 4 ...
Page 5: ... 5 ...
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Page 21: ...SPP A941 25 26 5 6 SCHEMATIC DIAGRAM BASE RF Board See page 43 for IC Block Diagrams Page 30 ...
Page 28: ...SPP A941 39 40 5 14 SCHEMATIC DIAGRAM HAND RF Board See page 43 for IC Block Diagrams Page 42 ...
