QW-1572
MODULE NO.
R
REF. NO. S/M-553
APRIL 1997
W-741
SERVICE MANUAL
& PARTS LIST
(WITHOUT PRICE)
INDEX
-- 1 --
Item
Detail
Battery
CR2016
Battery life
Approx. 7 years
Current consumption
1.22
µA maximum
Alarm system
Piezo plate on Back cover
Accuracy
±30 sec./month
Accuracy setting system
Pad selection (CG1 ~ CG3)
Accuracy checking
See page 7
Accuracy setting
Unadjustable
Functions
· Electro-luminescent backlight
· 1/100 sec. stopwatch
Measuring capacity: 59'59.99"
Measuring mode: Net time, split time, 1st-2nd place times
· Daily alarm
· Hourly time signals
· Regular timekeeping: Hr, min, sec, am/pm, day, date
· Auto-calendar (28 days for February)
· 12/24-hour formats
1. SPECIFICATIONS: QW-1572
CONTENTS
1. SPECIFICATIONS: QW-1572 ........................................................................ 1
2. OPERATION CHART: QW-1572 ................................................................... 2
3. DRAWINGS
3-1. BLOCK DIAGRAMS: QW-1572 ........................................................................
3
3-2. CHECKING TERMINALS AND COMPONENTS: QW-1572 ............................
4
3-3. N1 ~ N3, CG1 ~ CG3 PADS ..............................................................................
4
4. EXPLODED VIEW: QW-1572 ........................................................................ 5
5. PARTS LIST: QW-1572 ................................................................................. 6
6. PRECAUTIONS FOR REPAIR: QW-1572
6-1. AC (ALL CLEAR) AND REMOVING OF MODULE ..........................................
7
6-2. ACCURACY CHECKING ..................................................................................
7
-- 2 --
2. OPERATION CHART: QW-1572
-- 3 --
CG1
CG2
CG3
XTB
XT
Xtal
LSI (CMOS)
T3
T1
T2
T4
S1
S3
S4
AC
VBAT2
L1
L24
C2
C4
SF
EL
L
VBAT1
VCC
VC
VSS1
VSS2
VDD
BD
N1
N2
N3
LCX
LCY
LCZ
C5
Tns
Tr2
Tr1
TE
TB
R
SE
PF
PE
C3
+
C1
PZ
BAT
TOTAL
BONDING
51PINS
49PINS
p1
p1. No bonding.
p1
3. DRAWINGS
3-1. BLOCK DIAGRAMS: QW-1572
PM
L1
L2
L3
L4
L5
L6
LCX
LCY
LCZ
L7
L8
L9
L10
L11
L12
L13
L14
L15
L16
L17
L18
L19
L20
L21
L22
L23
L24
L4Z
L4Y
L3X
L7Y
L3Z
L3Y
L4X
L6Y
L5Y
L6Y
L6Z
L5Z
L5X
L6X
L2X
L1Y
L8Y
L7X
L8X
L7Z
L8Z
L2X
L2Z
L1Z
L1X
L2Y
L23Z
L22Z
L21Y
L21X
L22X
L22Y
L21Z
L20X
L20Z
L17X
L17Y
L17Z
L16Z
L16X
L16Y
L15X
L15Z
L14Y
L15Y
L18Z
L13X
L13Y
L13Y
L12Y
L12Y
L12Z
L13Z
L11X
L11Y
L11Z
L10Z
L10X
L9Y
L10Y
L9X
L12X
L9Z
L19Y
L18X
L19X
L20Y
L19Z
L18Y
L14Y
L23Y
L24X
L24Z
L14Z
L23X
L24Y
-- 4 --
3-2. CHECKING TERMINALS AND COMPONENTS: QW-1572
Top view of P.C.B. ass'y
Bottom view of P.C.B. ass'y
VDD
S4
S3
SE
SF
PF
PE
PE
TE
(VBAT1)
TB
(SF)
S1
VSS2
VDD
VSS2
VSS1
VDD
VDD
L
VSS1
VDD
VBAT1
VBAT1
VBAT1
VCC
VC
S4
SF
(VBAT1)
TE
TB
(SF)
VC
AC
SE
BD
VBAT1
L
L
VDD
VDD VBAT1
XTB
XT
SE
S4
S3
S4
S1
VDD
N3
N1
XT
CG1
XT
CG2
XT
CG3
N2
VDD
VDD
2. PCB ass'y
(7240 9753)
C4 7. Capacitor/Tantalum
(2895 2044)
L 5. Coil
(7020 0503)
Tr1 4. Transistor
(7101 1151)
C1 8. Capacitor/Chip
(7103 3866)
C3 8. Capacitor/Chip
(7103 3866)
C2 8. Capacitor/Chip
(7103 3866)
Tr2 3. Transistor
(7101 1409)
C5 8. Capacitor/Chip
(7103 3866)
19. Cushion/506
(7211 9631)
Tns 6. Transformer
(7101 5854)
20. Tape/Adhesive 1416
(7229 0623)
R 9. Resistor/Chip
(2791 0599)
3-3. N1 ~ N3, CG1 ~ CG3 PADS
Never solder or desolder these pads, because they have been selected best in the production line.
A new P.C.B. with new components as a spare parts will be supplied with factory adjustment of
these pads.