Sharp GF-9292X User manual

w Service Manual
The model GF-9292X
same as the former GF
(1) The meter is of LED indication.
(2) The front design is different from that of the GF-9191X.
(3) “AM” indication of the radio band selector is different from the
corresponding one (“MW”) of that of the GF-9191X.
As for the items “Description of APSS”, “Mechanical Adjustment”,
“Electrical Measurement” and “General Alignment Instruction”. they
are all omitted from the explanations of this Service Manual and there-
fore refer to the already issued
“GF-9191X Service Manual” to see the
details of them.
SPECIFICATIONS
GENERAL
Type:
Power source:
Power consumption:
Speaker:
Power output:
Semiconductors:
Dimentions:
Weight:
Input terminals:
Outout terminals:
Auto Program Search System
MODEL
GF-9292X
In the interests of user-safety the set should
be restored to its original condition and only
parts identical to those specified be used.
Portable stereophonic cassette tape
recorder with built-in AM/SW,/SWZ/
FM 4-band radio
AC 110/220/24OV, 50/60 Hz
DC 15V (Ten UM/SUM-1 , R20, “D”
size batteries or External DC supply)
35 w
16 cm (Woofer) x2,
5 cm (Tweeter) x 2
Dynamicpower20W(10W+10W)
8-IC (Integrated Circuit), 34-transistor
and 44-diode (13-Light Emitting Diode)
516mm(W) x115mmiD) x271mm(H)
[20-5/16“(W)x4-1/2”(D)x10-11/16”(H)1
6.5 kg (14.3 Ibs.) (without batteries)
1 EXT. MIC. 600 ohms (JlOl-A,
JlOl-B)
2 Mixing mic. 600 ohms (J401)
3 Remote control (JIOI-G)
4 EXT. DC power (JSOI )
5 AC input power (SO901)
6 REC/PB DIN socket, 2.5 mV/lO K
ohms (SO1 01)
7 FM EXT. antenna (TBI)
8 PHONO (J103-A, J103-B)
1 EXT. speaker, 4 - 8 ohms (JlOl-E,
JlOl-F)
2 PHONES, 8 - 25 ohms (J603)
3 REC/PB DIN socket, 0.7V/50K ohms
(s0101)
4 Line out, 0.7 V/50 K ohms (JlOl-C,
JIOI-D)
TAPE RECORDER SECTION
Type: 4-track stereo cassette tape recorder
Tape:
Philips type compact cassette tape
Tape speed:
4.8 cm/set.
Recording system: AC bias
Erasing system: AC erasing
Recording time: 60 minutes (with C-60 tape)
Fast forward or
rewind time:
120 sec. (with C-60 tape)
Frequency response: 40
- 15,000 Hz (CrOz tape)
40 - 12,000 Hz (Normal tape)
Wow and flutter:
0.09% (WR MS)
SIN ratio: 50
dB
RADIO SECTION
Frequency range:
AM 525 - 1,605 kHz
SW, 2.3 - 7.3 MHz
SW2 7.3 - 22 MHz
FM 87.6 - 108 MHz
Intermediate
frequency:
AM/SWI/SW2 455 kHz
FM 10.7 MHz
4-band superheterodyne system
AM/SW, ferrite core bar antenna
SW, /SW,/FM telescopic antenna
FM EXT. antenna
Circuit system:
Antenna:

NAMES OF PARTS
:ernal DC power jack
TunmglR-ch record and
playback level meter’-1
1
FM stereo indicator
Battery condition/L-ch
record and playback level
I Ii i
APSS lndvzator
Playback key
Fast forward/Cue key
Editor switch
Loudness switch
Meter selector/Dial light switch
Mains socket
Treble control
Volume control
Forward APSS key
Stop key
Digital tape counter
Earth terminal
Record key
Rewind/Review key
Eject key
7 Power switCh
m Function selector
Mode selectori
FM muting switch
Fader control
Mixing microphone jack
Revers APSS key
Figure 1
-2-

DISASSEMBLY
q FRONT CABINET REMOVAL (Refer to Figures 2 and 3)
I. Pull out the power cord plug or adaptor plug from the unit.
2. Take out the cassette tape from the cassette holder.
3. Remove eight (8) screws retaining the front cabinet.
4. Gently pull out the front cabinet and disconnect four (4)
tros (Soeaker) connected to the
main P.W.
board
q OPERATION PANEL REMOVAL (Refer to Figure 3)
1. Remove the front cabinet as described in front cabinet
removal.
2. Remove seven (7) knobs (record level, bass, treble, volume Figure 2
and fader).
3. Gently lift up the operation panel from the back cabinet.
a DIAL SCALE PLATE REMOVAL (Refer to Figure 3)
I. Remove the operation panel as described in operation panel
removal.
2. Remove four (4) screws retaining the dial scale plate.
3. Gently pull out the dial scale plate from the chassis.
@ MECHANISM BLOCK REMOVAL (Refer to Figure 4)
1. Remove the dial scale plate as described in dial scale plate
removal.
2. Disconnect the tip (muting) and two (2) sockets (Sol,
SOZ) connected to the main P.W. board and the motor
P.W. board.
3. Remove four (4) screws retaining the mechanism block.
4. Gently pull out the mechanism block from the main P.W.
board holder.
q PHONO JACK PLATE REMOVAL (Refer to Figure 5)
1. Remove the mechanism block as described in mechanism
block removal.
2. Remove two (2) screws retaining the phono jack plate.
3. Gently pull out the phono jack plate from the back cabinet.
a
CHASSIS (P.W.B.) REMOVAL (Refer to Figure 5)
1. Remove the phono jack plate as described in phono jack
plate removal.
2. Remove two (2) knobs (tuning and fine tuning).
3. Disconnect three (3) tips (Antenna) and two (2) tips (DC
supply) connected to the main P.W. board.
4. Remove seven (7) screws retarning the chassis (P.W.B.).
5. Gently pull out the chassis (P.W.B.) from the back cabinet.
L
Figure 3
Figure 4
Figure 5
-3

As for “Description of APSS”, “Mechanical Adjustment”,A
S for all the items except “VU-Meter Adjustment”, refer to
“General Alignment Instruction” and “Electrical Measure- Service Manual of Model GF-9191X.
ment”, refer to Service Manual of Model GF-9191 X.
LEVEL AND SENSITIVITY ADJUSTMENT OF VU METER
1. Connect the V.T.V.M. across the 100 ohm resistors (RI 15,
R116).
2. Short circuit the primary coil of the oscillation coil (L301 )
to stop bias oscillation.
3. Connect the signal generator to the EXT. MIC jacks (JlOl A,
JlOlB) and apply signal (IkHz, -6OdB) to the unit.
4. Place the unit in RECORD mode.
5. Connect DC voltmeter between TP51 and TP52 (ground)
and adjust left channel record level control (R148) so that
DC voltmeter indicates I .OV.
6. Adjust the semi-variable resistor (R907) so that 5th LED
7. Next, change the voltage of TP51 to 0.95V by sliding the
record level control (R148), and in this time, check the 5th
LED (D914) of VU meter fails to light.
8. Adjust the record level controls (R147, R148) so that the
V.T.V.M. reads 3.5mV.
9. Adjust the semi-variable resistors (R 187, R188) so that 4th
LEDs (D908, D913) of VU meters begin to light.
IO. Set the level of signal generator to -6ldB and this time,
check the 4th LEDs (D908, D913) of VU meters fail to
light.
(D914) of VU meter begins to light.
SWITCH POSITION
lower (SW1 01 F) tape
node (SW107) stereo
neter/light (SWlO9) VU
nixing (SW104)
off
oudness (SW1 08) off
:ape (SW106) normal
-ecord mode (SWIOS)
manual
SIGNAL GENARATOR
R/P HEAD
MIC JACK RECORD mode
DC VOLTME TEF
TP52
Figure 6

J401
RI39
SW104
RI40
SW107
SWlOlF SWlOlE SWIOID
SWlOlC SWIOIB
SWIOIA
/
D913
D911
0906 D908
D914 D912 D9,D
TUNING/RIGHT-“,
I .
LCh RCh
spa
(Lch)
EXT. SP EXT.
MIC
.
LINE OUT
(TP5)
m
.
l[TP
a
, L
B-A
Lch
Rch
L-JUU ’
L-
REMOTE
SW301
JIOI-F JIOI-E JIOI-D
JIOI-C
so I01
JIOI-8 JIOI-G JIOI-A
Figure 7 ALIGNMENT POINTS