Sharp WQ-T281Z - Page 4

WQ-T2812
WQ-T2812
DISASSEMBLY
Caution on Disassembly
Follow the below-mentioned notes when disassembling the
unit and reassembling it, to keep its safety and excellent
performance:
. Take cassette tape out of the unit.
. Be sure to remove the power supply plug from the wall
outlet before starting to disassemble the unit and remove
the batteries from the unit.
. Take off nylon bands or wire holders where they need
to be removed when disassembling the unit. After
servicing the unit, be sure to rearrange the leads where
they were before disassembling.
. Take sufficient care on static electricity of integrated
circuits and other circuits when servicing.
STEP | REMOVAL PROCEDURE | FIGURE |
Front cabinet
. Open the cassette holder
.Socket........... (C)x1
Mechanism 1.Screw. .......208- (D)x1
2. Mechanism mode lever . .(E)
3.Socket........... (F)x3
Frame
(with P.W.
Board)
. Battery case... .....
.Shield plate ........ (1}x1
Ooi | © ene a ee (J)x 1
z -
*1 Keep horizontal the handle as shown in Fig. 5—4, and
remove it in the numerical order.
e Cautions on reassembly
1. For reassembly of the mechanism, be sure, beforehand, to
arrange the head’s leads, 11-pin connector’s leads and 2-pin
connector’s leads (from the power PWB) so that they won’t
be entangled with the motor belt and record lever.
2. When attaching the front cabinet, keep the PLAY @ button
depressed to avoid entanglement of the mechanism leads
with the cabinet.
(B)x8
$3 x 65mm {A}
Rear Cabinet
Figure 5—1
(D) x1
(D)x1 o3 x 6.5mm
3x 25mm CW) pring
ec{e
4}
(D) x 1 =
4 x 10mm &
T Mechanism Mode
Switch Lever
ceatseteGs:
(C) x1
63 x 10mm
Mechanism
(G) x 2
o3 x 12mm
Figure 5—2
(G)x1
63 x 8mm
(tf) x 1
(F) x3 | f
i so ; (J) x1
CAL gg Se eT a ceeeeee :
a
oT
ee
(H) :
(G) x 3
$3 x 10mm (G) x 1
63 x 25mm
Figure 5—3
(O)
(N) x 4
$2.6 x 10mm
Figure 5—4
ROD ANTENNA
SWIi-A
td LI
AM BPF
vo
Swi Lé
SW2 SWe2 ANT.
L?
L7
AM ANT
CO/ LINE
JIO?! (a
L-ch (9)
JIo2
R-ch
JIO3
EXT. MIC.
IN MIC.
DECK |
PLAYBACK HEAD
R-ch—~e
REC/PB
SWIO5-A,B,C,D .
* P.g (x)
DECK 2
RECORD /
PLAYBACK HEAD REC
R-ch=*¢]
aT he
FM DET
(iz)
Ic | Th CFI QUED
o FM FRONT END ) FM IF oe
Vee Ic 2
(2) 3) (6)
1 L2 L3
! FM RF FM OSC
(~)
Vee
swi-D
SWw2z
GRAPHI
c
. EQUALIZER
CD, LINE/RADIO
TAPE 6% VRIOW,B) Lf ion
SELECTOR xX 2 Sioa
SWIOH(A,B) VRIO4IA,
LINE AMP.
RECORD AMP
MUTING
DUSBING
SWI03-A
Swid2 ic , D)
TAPE SELECTOR
0508,
Q309
NORMAL / HIGH
EQUALIZER
SELECTOR
MECHANISM
MODE SELETOR
SWw503
MECHANISM
ELECTOR
PRE-AMP
Sen SOL5O1 SWS5O2 j
; SOLENOID APSS
oe
@302
S<)
+B2
DSO7
Co L350! ae Q50! DECK |
SWwio4 SWIOS-E CONSTANT nic.
BEAT CANCEL REC/PB VOLTAGE
Figure 6 BLOCK DIAGRAM
26 =
SWITCHING
NTROL
ere / HIGH
Q504,0505
VRSO!
aiene / TWIN
Q3506, 0507,Q510
FM iF/AM MIX.OSC IF
(18) ie = ts) (6)
Swi ANT yu AM
ic al LT me La L9 LIO +B2 3
© fo lswe osc] Isw: osc] | am osc CFS
+82
VOLUME
DUBBING
QIO3-B
ae
SW503
MUTING
GI0?7,
0108
VRi
DIIO
V.C.0. FM STEREO
ADu. IND.
JIOS
POWER AMP. PHONES
WOOFER
3 Spi,
DUBBING
+8
swioi-c K
CD, LINE /RADIO/ v4
TAPE SELECTOR
MECHANISM
(> C) MODE
{ Y¥ SELECTOR
Tl T2
+6 +8
0508
DECK 2
IND.
D6Ol
RECTIFIER
SWSOl
F6OI
2A
I
(8)--—+0! SPEAKER
i= SP3,4
Tr TWEETER
RIPPLE
FILTER
+82
D503
r POWER
ND.
TBI
T6O!
POWER
TRANSFORMER
S060)
s AC SOCKET
AC HO~i27V
220~240V
Jo eccccengf oA
BATTRIES 15V