(WITHOUT PRICE)
SERVICE MANUAL
& PARTS LIST
REF. NO. S/M-526
MAY 1996
QW-1557
MODULE NO.
R
DW-002SD
(QW-1557)
- 1 -
OPERATION CHART:MODULE QW-1557
- 3 -
DRAWINGS AND SPECIFICATIONS: MODULE QW-1557
[BLOCK DIAGRAM]
- 4 -
[N1~N4 PADS]
Never solder or desolder these pads, because they have been selected best in the production line.
A new P.C.B. with components as a spare parts will be supplied with factory adjustment of these pads.
[SPECIFICATIONS]
[CHECKING TERMINALS AND COMPONENTS]
KI2
KI8
VDD
VDD
SE
KI5
KI3
KI1
VDD
KI8
N4
N3
N2
N1
VSS3
VSS2
L
L
VDD
L
BD
VCH
VSS2
VDD
VDD
KI2
XT
AC
VSS2
LD1
VDD
VDD
XT XTB
VSS1
VDD
TB
VSS2 LD1
TE
TB
KI1
KI3
TE
TE
TB
VC1
VDD
VDD
L
VCH
KI5
VSS2
VDD
VDD
TE
VDD
SE
SE
VDD(PF)
PE
TB
(SF)
PE
VC1
VC2
VDD
VDD
C7 13 .Chip capacitor
(7103 3866)
3 .Transistor
(7101 1409)
Tr2
14 .Chip resistor
(2791 2079)
R
35 .Cushion 6
(7211 0064)
8 .Quartz oscillator
(7110 5014)
Xtal
13 .Chip capacitor
(7103 3866)
C2
9 .Trimmer capacitor
(7103 0458)
CT
40 .Adhesive tape 1199
(7229 0616)
Tr1
5 .Transistor
(7101 1151)
Tns1 7 .Transformer
(7101 1417)
C6
11 .Tantalum capacitor
(7911 1260)
C5
10 .Tantalum capacitor
(7103 7275)
C4
12 .Chip capacitor
(7103 2477)
L
6 .Coil
(7020 0333)
C3
13 .Chip capacitor
(7103 3866)
13 .Chip capacitor
(7103 3866)
C1
4 .Transistor
(7101 5413)
Tr3
2 .P.C.B. with
components
(7240 9165)
Top view of P.C.B. ass'y
Bottom view of P.C.B. ass'y
Item
Detail
Item
Deail
Battery
CR2016
Accuracy
±15sec./month
Battery life
Approx. 2 years
Accuracy setting system Trimmer capacitor
Current consumption
1.91
µA maximum
Accuracy checking
See page 7
Alarm system
Piezo plate on Back cover
Accuracy setting
+0.25~0.35sec./day