Toshiba QR-2000 User manual
SERVICE
DATA
FILE
NO.
150-128
TOSHIBA
LCD
QUARTZ
CLOCK
RADIO
R-2000
|
2R—2000
OPERATING
CONTROLS
c-
Telescopic
Antenna
|
Light/Snooze
l
|
—
Jack
——
\/olume
Control
Function
itch
aM
Tuning
Control
Volume
Control
Second
Reset
(VOL)
Button
(SECOND)
Time
Display
Select
Switch
Minute
Adjustment
1...
Alarm
Indicator
Button
(MINUTE)
2...
Time
Adjusting
3...
Second
Indicator
Hour
Adjustment
4...
Time
Indicator
Button
(HOUR)
Tuning
Control
(TUN)
:
Sleep
Button
(SLEEP)
Function
Switch
"
ee
ee
ee
|
(OF
F/ON/AUTO/
i
a
=
Clear
Button
(CLEAR)
ALARM)
Rio
ee
Band
Switch
(FM/AM)
Figure
1.
Figure
2.
DISASSEMBLY
INSTRUCTIONS
BACK
CABINET
REMOVAL
(Figure
3.)
MAIN
P.C.
BOARD
REMOVAL
(Figure
4.)
1.
Remove
4
Screws,
1)
and
(2)
:;
1.
Unsolder
five
points
in
the
main
P.C.
Board
and
speaker
2.
Remove
the
battery
cover
for
radio
side.
and
battery
lead
wires.
3.
Separate
the
cabinet
back
from
the
cabinet
front.
2.
Remove
the
Main
P.C.
Board
from
the
cabinet
upward.
(4)
......
Screw
OVL
2¢
x
16™™
(BLK)
(2)
......
Screw
OVL
26x
8™™
(BLK)
Figure
3.
Figure
4.
|
QR—2000
CLOCK
P.C.
BOARD
REMOVAL
(Figure
5.)
=f
1,
Remove
a
screw
(1)
andastud
(2)
.
I:
ache
Screw
BID
2¢
x
3
(BLK)
2.
Separate
the
CLOCK
P.C.
Board
from
the
cabinet
front.
Figure
5.
DIAL
CORD
RESTRINGING
GENERAL
1.
Remove
the
Dial
plate.
2.
Set
the
variable
capacitor
to
the
minimum
capacitance
(Plates
fully
open).
3.
Tie
the
spring
and
dial
cord
as
shown
in
the
illustration.
4.
Insert
the
dial
cord
through
the
dial
pulley
eye,
and
wind
the
cord
as
shown
in
the
illustration.
5.
Hook
the
spring
on
the
drum.
Dial
Cord
ee
Tuning
Knob
1%
Turns
Dial
Drum
Drum
Spring
Drum
Spring
47mm
(0.39)
Figure
6.
CLOCK
ALIGNMENT
CLOCK
ALIGNMENT
After
leaving
the
set
for
30
minutes
at
25°C
+5°C,
rotate
the
trimmer
capacitor
to
set
the
clock
to
O
second.
Proceed
the
above
adjustment
with
a
screwdriver
through
the
external
adjusting
hole
holding
the
Silver
Oxide
as
illustrated.
Rotating
the
trimmer
capacitor
about
by
ten
degrees
will
produce
a
time
difference
of
+0.4
second.
Counterclockwise
rotation
puts
the
clock
back
and
clockwise
rotation
on.
Silver
Oxide
Adjusting
Hole
Cabinet
Back
Figure
7.
—
3
—
\R—2000
|
5.
ALIGNMENT
INSTRUCTIONS
TEST
EQUIPMENTS
AM
Signal
Generator
with
frequency
range
of
at
least
from
145
kHz
to
23
MHz
AM.
FM
Signal
Generator
with
10.7
MHz
marker
signal.
FM
Sweep
Generator
with
a
wide
band
amplifier
of
approximately
500
kHz,
with
10.7
MHz
marker
signal.
Oscilloscope
with
a
wide
band
amplifier
of
approximately
100
kHz.
Test
loop.—
a
coil
of
any
size
wire
with
one
turn
or
more.
(AM)
VTVM.
75
ohm
dummy
antenna.
(FM)
Se
Se
Sa
NOTE:
When
proceeding
adjustment
with
the
Radio
P.C.
Board
separating
from
the
Clock
P.C.
Board,
@
should
be
connected
to
().
(See
figure
4.)
ont
t--3
ar
4
?
(AM
ANT.)
in
C104
(AM
OSC.)
LOOS
(FM
RF)
(FM
OSC,
(FM
IF)
Figure
8.
AM
ALIGNMENT
emu
e
Turn
on
the
AM
signal
generator
and
the
VTVM,
and
allow
a
fifteen-minute
warm-up
period.
Using
the
test
loop
across
the
output
of
the
signal
generator,
inductively
connect
the
signal
generator
to
the
radio.
Connect
the
VTVM
across
the
voice
coil
or
an
8
ohm
dummy
load.
Set
the
band
select
switch
to
AM
position.
Set
the
signal
generator
frequency
as
listed
in
AM
ALIGNMENT
CHART
and
maintain
a
sufficient
output
level
to
provide
an
indication
on
VTVM.
Set
the
volume
control
to
mid-position.
Proceed
as
outlined
in
the
AM-IF
ALIGNMENT
CHART.
|
OR-2000
arR—2000
|
AM
ALIGNMENT
CHART
Signal
Band
Step
Generator
Radio
Dial
Setting
Frequency
Approximate
1000
kHz
Adjust
for
maximum
indication
T101,
105
Tuning
Knob
Fully
Counter-
1
460
kHz
clockwise
L102
515
kHz
.
(Lowest
Frequency)
(Ose.
Coil)
9
1650
kHz
Tuning
Knob
Fully
Clockwise
C104
Adjust
for
maximum
(Highest
Frequency)
(Osc.
Trim.)
indication
Adjust
for
maximum
indication
AM
3
Repeat
steps
1
and
2
as
required
600
kHz
Tune
to
Signal
L101
Adjust
for
maximum
(Ant.
Coil)
indication
1400
kHz
Tune
to
Signal
C103
Adjust
for
maximum
(Ant.
Trim.)
indication
5
6
Repeat
steps
4
and
5
as
required
FM-IF
ALIGNMENT
1.
Set
the
select
switch
to
FM
position.
_
Turn
on
both
sweep
generator
and
oscilloscope,
and
allow
a
fifteen-minute
warm-up
period.
-
Connect
the
RF
SWEEP
SIGNAL
OUTPUT
from
the
signal
generator
through
the
loop
antenna
to
the
receiver.
_
Connect
the
oscilloscope
vertical
input
directly
to
the
test
point
TUN
OUT
H
and
connect
the
shielded
lead
to
the
WN
test
point
E
or
chassis
ground.
5.
Connect
the
SWEEP
VOLTAGE
OUTPUT
of
the
sweep
generator
to
the
oscilloscope.
6.
Proceed
as
outlined
in
the
FM-IF
ALIGNMENT
CHART.
FM-IF
ALIGNMENT
CHART
Tuning
Pointer
Set
scope
for
con-
Turn
the
core
of
T104
necting
output
counterclockwise
to
signal
from
TUN.
obtain
a
single
peak.
OUT
to
vertical
Adjust
the
core
of
T102
axis
of
scope
““V"’
and
T1103
in
order
until
and
sweep
gener-
the
best
single
peak
is
ator
output
to
obtained.
horizontal
axis
Finally
turn
the
core
of
seo
be
T104
to
obtain
S
curb.
Sweep
generator
of
|middle
10.7
MHz
position
center
freq.
with
10.7
MHz
marker.
Connect
sweep
generator
output
to
a
three-turn
loop
antenna
of
10cm
diameter.
IF
Sweep
Test
Generator
Coupling
Hook-up
FM
Generator
Receiver
under
test
FM
Sweep
Generator
Receiver
under
test
3-turn
Loop
Antenna
located
near
the
LOO6
Figure
9.
pees
ee
S
Curve
Figure
10.
FM-RF
ALIGNMENT
.
Turn
on
the
signal
generator
and
the
VTVM,and
allow
a
fifteen-minute
warm-up
period.
.
Connect
the
signal
generator
output
through
a
75
ohm
dummy
antenna
across
FM
ANT.
.
Connect
the
VTVM
across
the
voice
coil
or
an
8
ohm
dummy
load.
.
Set
the
volume
control
to
mid-position.
.
Adjust
the
signal
generator
frequency
as
indicated
in
FM-RF
ALIGNMENT
CHART,
and
maintain
a
sufficient
signal
output
level
to
provide
a
measurable
indication.
6.
Proceed
as
outlined
in
the
FM-RF
ALIGNMENT
CHART.
om
Bm
WN
—
FM-RF
ALIGNMENT
CHART
Step
|
Signal
Generator
Radio
Dial
Setting
Adjustment
Remarks
1
87.5
MHz
Tuning
Knob
fully
L007
Adjust
for
maximum
|
Counterclockwise
Osc.
Coil
ee
ar
(Lowest
Frequency)
(
output
indication
109MHz
Tuning
Knob
fully
C004
Adjust
for
maximum
Clockwise
(Osc.
Trim.)
(Highest
Frequency)
Repeat
steps
1
and
2
as
required.
4
|
90MHz
C003
5
106MHz
|
(RF
Trim.)
pe
|
Repeat
steps
4
and
5
as
required.
output
indication
LOOS
(RF
Coil)
;
Adjust
for
maximum
Tune
to
signal
Output
indication
(Sor
ee
ee
a
oe
7
A
To
signal
generator
50
ohm
|
To
receiver
(SG
impedance
50
ohm);
50
ohm
,
|
E
75
ohm
dummy
antenna
Figure
11.
CAUTION:
When
realigning
the
FM
Receiving
Frequency,
the
lowest
side
of
the
frequency
range
must
not
be
below
87.5
MHz
in
order
to
comply
with
FTZ
regulations
in
West
Germany.
a
Gop
QR—2000
QR—2000
ELECTRICAL
PARTS
LOCATIONS
BATTERY
DC1.5V_
G-I3
TELESCOPIC
ANTENNA
0802
1S155
TP-2
Q
802
25C1000-GR
Pras
e
Figure
12.
SNOOZE
$806
$802
DISPLAY
SWITCH
ALARM
TIME
ADJ.
SECOND
TIME
5
864
MINUTE
OFF
ON
AUTO
ALARM
to
SP
ra
to
Battery
(-)
S80!
Battery
(+)
FUNCTION
SWITCH
SPEAKER
4Q
BATTERY
SUM-3x2
DC3V
Figure
14.
|
QR—2000
QR—2000
|
SCHEMATIC
DIAGRAM
aaeneshonic
[QO0I
2SC7e4-R
002
2SC785-0
corn
sp
Foor
wx
9102
DIFAO-O
OOS
PSCTE4O
104
ZSCIBO-Y
105
25C784-0
pio)
plowINGOFDI
ios
NEO
.
ANTENNA
;
heed
DOP
ane
ary
“pore
-
C00?
R003
«~—Ss«C
,
82256
we
pear
wa)
ares
LOOI
L002
2.5P
0.4V
QO0!
2
ay
33
SP
gay
QQOQ2
{ROG
22
—
T02
C)
wy
wy
:
1
|
By
QI02
Q103
y
Z102
QI04
06
Apall
8"
SFE-I0.7MS2
&
:
100
ONOF
Cx
RII2
47
;
)
we
=
!
C006
56P
C005
5P
C401
one"
ee
a
D104
Henley
~~
C20!
Basic
line
a
measuring
voltage
for
QO01},Q002
,QIOI
at
pe
C103
L1Q|
C106
0,01
EARPHONE
IQiG3
wy
1
=
BATTERY
DC3V
I
1
'y
lois}
71
“Ico,
100
BATTERY
DCI.SV
G-I3
Letters
in
black
show
24
hours.
Letters
in
red
show
{2
hours.
a
L
JU
ene
dc
3e 3d
3c00R2e
2d
2c
le
Id
Ic
i
ees
|
eee
le
SUM-3X
2
7
SPEAKER
rt
Cet
Aohm
C407
S101,
102---Band
Switch
nS
BH
oO,
IBV
Basic
line
for
measuring
om
for
Q
AOI,
0402,
Q
:
position
to
FM.
||
|__
ai
151555
|
|...
Variable
Capacitor
COO!
to
COO4/C101
to
C104
4b
AM
3g3f
3a
3b
2g
2f
20
2b
Iq
If
ta
Ib
NDOO@OOOQODOOQOU
OG
Ghl2
(28
CNT.
OUT
@
63)
\
2
SLP.
OUT
804
Cn
Fs
(6)
D804
TOK
|
6)Cir
&OC
Fu
@
TON
LAUTO_ALARM
ee
Cop
xDC
Q803
FH
(8)
0.|
aS
Con
28
;
uPD833G
BOTTOM
VIEW
OF
TIO3
p
|
wc
rs
me
TOP
VIEW
OF
LSI
‘LSI
O-4
B04
eens
©
QO)
V
op
ALS
@
e
tsi
€5
OSC
OUT
SEC
@
ae
AL
OZ
ea
J
Za
Ne
ees
,
are
B03
[32.768
|
|
=
ae
|
|
Kk
Q2)
60/120
SCI
t
R
Hal
@)
60/30
ALM
OUT
©
COLLECTOR
MARK
32
Q)
OB
AD”
OB
OB
DOO
Cs
80
rv
c
ZIO1
TERMINAL
NO.
-
C
sa
nl
Gadge
4c
3e
3d
SOR
2d
2c
Ie
Id
Ic
Sgo4
i
|
NOTE:
PM
4b,4c
ON
O
O-@MINUTE
All
resiotance
values
are
shown
in
ohms.
S805
Except
where
noted
by
P
all
capacitance
are
shown
in
microfarads.
HOUR
K=1000
M=1,000,000
P=
7%
Se06
alle
A
----
Micro
Resistor
(1/16
W)
D802
D803
SNOOZE
;
@
+=
Tip
Capacitor
S807_
5
6-4
CLEAR
@
----
Temperature
Compensation
(CH)
le
eke
15802
DISPLAY
SWITCH
Sg08
alle
O
-----Carbon
Solid
Resistor,
other
no
mark
resistors
are
carbon
film
I/8W.
p80!
to
0804
1S
1555
De
C-P
SLEEE
©
-----Metal
film
Resistor
|/8W
ALARM
TIME
ADJ,
SECOND
eS
ST
as
—
All
voltages
are
measured
with
Tester
of
2OQKohms.
Figure
15.
|
OQR—2000
-
QR-2000
|
EXPLODED
VIEW
PARTS
LIST
Symbol
No.
|
Part
No.
Description
TRANSISTORS
&
DIODES
0001
Transistor,
25C784-R
0002
Transistor,
2SC785-O
0101
Transistor,
2SC941-O
0102
Transistor,
25C380-O
0103,
104,
Transistor,
2SC784-O
105
0401,
402
Transistor,
2SA495-O
0403,
404
Transistor,
25B415-B
DOO1,
003,
Diode,
1N60,
FD1
101,
102
DOO2
Diode,
1$2236
D103
Diode,
1N60
D104
22692017
|
Diode,
KB-269
D401
Diode,
181555
LOO2
22292112)|
Coil,
Antenna,
FM
with
Core
LOO3,
004
22294230
|
Coil,
Antenna,
FM
LOO5S
22294362
|
Coil,
RF,
FM
LOOG,
001
22292077
|
Coil,
Antenna,
FM
LOO7
22294016
|
Coil,
Oscillator,
FM
22242691
|
Coil,
Antenna,
AM,
with
Core
22245236
|
Coil,
Oscillator,
AM,
RED
22264749
|
Transformer,
IF,
1764749,
AM,
WHT
22265766
|
Transformer,
IF,
1T65766,
FM,
VLT
22267353
|
Transformer,
IF,
1T67353,
FM,
RED
22267354
|
Transformer,
IF,
1767354,
FM,
BLU
22266343
|
Transformer,
IF,
1T66343,
AM,
BLK
22214324
|
Transformer,
Input
22216307
|
Transformer,
Output
ELECTRICAL
PARTS
22195107
|
Switch,
Band
Change
22153083
|
Ceramic
Filter
22153058
|
Ceramic
Filter,
FM,
10.7
MHz
22151741
|
Speaker,
SP-O5S1E
22163682
|
Jack,
Earphone,
3.5¢
22124474
|
Telescopic
Antenna
22104453
|
Clock
Ass’y,
24H
CAPACITORS
Capacitors
are
Ceramic
50V
unless
otherwise
noted.
D
=+0.5pF
J=15%
K=+10%
M=+20%
Z
=
*80x%
Figure
16.
es
Os
CDILS
&
TRANSFORMERS
C001
to
004
|
22308164
|
Poly-variable
C101
to
104
C005
C006
C007
C008
C009
C010
C011
C012
C013
C014
C015
C016
C017
C018
22360360
22360351
22360382
22360381
22360366
22360344
22360356
22360360
22360362
22360356
22360344
22360361
22360383
22360360
22360345
22306344
22306371
22360344
22306345
22360360
22360366
22360366
22360366
22360347
22490011
22360344
22360347
22360346
22490002
5pF,
K
56pF,
K
2.5pF,
K
51pF,
K
0.001uF,
K
0.01uF,
M,
25V,
Barrier
Layer
22pF,
K
5pF,
K
470pF,
K
22pF,
K
0.01uF,
M,
25V,
Barrier
Layer
3pF,
K
15pF,
K
5pF,
K
0.022uF,
M,
25V,
Barrier
Layer
0.01uF,
M,
25V,
Barrier
Layer
4pF,
K
0.01uF,
M,
25V,
Barrier
Layer
0.022uF,
M,
25V,
Barrier
Layer
5pF,
K
0.001uF,
K
0.001nF,
K
0.001uF,
K
0.1uF,
12V,
M,
Barrier
Layer
TUF,
35V,
Electrolytic,
Tantalum
0.01uF,
M,
25V,
Barrier
Layer
0.1uF,
12V,
M,
Barrier
Layer
0.047uF,
M,
12V,
Barrier
Layer
10uUF,
3.15V,
Electrolytic,
Tantalum
330pF,
K
330pF,
K
0.022uF,
25V,
M,
Barrier
Layer
0.01uF,
M,
25V,
Barrier
Layer
0.01uF,
M,
25V,
Barrier
Layer
100uUF,
3.15V,
Electrolytic,
Tantalum
1uF,
35V,
Electrolytic,
Tantalum
TWF,
35V,
Electrolytic,
Tantalum
0.47uF,
35V,
Electrolytic,
Tantalum
220pF,
K
0.1uF,
35V,
Electrolytic
Tantalum
:
100uF,
3.15V,
Electrolytic,
Tantalum
100
uF,
6.3V,
Electrolytic,
Tantalum
0.0iuF,
M,
25V,
Barrier
Layer
0.01uF,
M,
25V,
Barrier
Layer
0.1uF,
12V,
M,
Barrier
Layer
22360363
22360363
22360345
22360344
22360344
22490005
22490011
22490011
22490013
22360364
22490012
22490005
22490008
22360344
22360344
22360347
|
QR-—2000
C412
22490005
|100uF,
3.15V,
Electrolytic,
22550167
|68
ohm,
Carbon
Film
1/8W
Tantalum
—
|
22570413
|
39K
ohm
22570390
|
470
ohm
22550191
|6.8K
ohm,
Carbon
Film
1/8W
22570395
|
1.2K
ohm
22550171
|150
ohm,
Carbon
Film
1/8W
RESISTORS
; .
wes
;
92570431
|1
ohm,
Metal
Oxide
Film
1/8W
oe
oo
are
Micro
Resistor
1/16W
+5%
unless
otherwise
Thermistor,
D91A
noted.
2.2K
ohm,
Carbon
Film
1/8W
22550185
22550180
22570405
22570376
22570391
22570406
22570374
22570418
22550204
22540162
22570406
22570396
22570390
22570382
22570404
22570392
22570394
820
ohm,
Carbon
Film
1/8W
8.2K
ohm
33
ohm
560
ohm
10K
ohm
22
ohm
100K
ohm
100K
ohm,
Carbon
Film
1/8W
4100
ohm,
Carbon
Film
1/8W
10K
ohm
1.5K
ohm
470
ohm
100
ohm
6.8K
ohm
680
ohm
1K
ohm
CABINET
PARTS
22811080
22832486
22822131
22902040
22842169
22824246
22826212
22824247
22824248
22774550
25772459
22755107
22758070
Cabinet
Front
Ass’y
Cabinet
Back
Battery
Cover
Ass’y
for
Clock
Label
Cover
Ass‘y,
Control
Knob,
Tune
Knob,
Volume
Button,
Snooz
Button,
Clock
Plate
Spring,
Lock
Spring,
Battery
Support,
Tune
Sheet,
Antenna
22570394
;1K
ohm
22703246
|
Hold
Washer
22570392
|680
ohm
22743224
|
Tuning
Shaft
22570382
|100
ohm
22742202
|
Dial
Drum
22550185
|2.2K
ohm,
Carbon
Film
1/8W
22847350
|
Dial
Plate
22570414
|47K
ohm
25771910
|
Spring,
Drum
22570382
|100
ohm
22702150
|
Nut
4¢
22570394
11K
ohm
22757087
|
Holder,
Antenna
22570415
|56K
ohm
22753025
|
Stud
22550163
22570388
22570385
22550181
22550181
22570403
22570403
22570394
22570394
22570395
22570406
22570415
22570406
22613031
33
ohm,
Carbon
Film
1/8W
330
ohm
180
ohm
1K
ohm,
Carbon
Film
1/8W
1K
ohm,
Carbon
Film
1/8W
5.6K
ohm
5.6K
ohm
1K
ohm
1K
ohm
1K
ohm
10K
ohm
56K
ohm
10K
ohm
Variable,
124,
10K
ohm-D,
with
22758064
22758065
22725171
22758067
22751160
22822130
70432004
22707217
22707214
22707216
22707215
22707261
22707262
22707257
22758088
22751146
Cover
A,
Switch
Cover
B,
Switch
Battery
Contact
A
Cover
C,
Switch
Cushion,
Battery
Battery
Cover
Ass’y
Screw,
BID2¢
x
4mm
Screw,
BID1.7¢
x
2.5mm
Screw,
BID2¢
x
3mm,
BLK
Screw,
BID2¢
x
1.8mm
Screw,
BID1.7%
x
1.8mm
Screw,
OVL
24
x
8mm,
BLK
Screw,
OVL
2¢
x
16mm,
BLK
Screw,
FLT1.7¢
x
2mm,
BLK
Switch
Cover
D,
Function
Switch
Rubber
Button,
2
Gang,
Electric
Conduction
Rubber
Button,
3
Gang,
Electric
Conduction
Bobbin,
Antenna,
BLK
22570398
22570418
22570405
22570374
22550191
100K
ohm
8.2K
ohm
22
ohm
6.8K
ohm,
Carbon
Film
1/8W
22751147
22875037
S240
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