Sharp GF-320A Service Manual

Page 1
MANUAL
F320ABK
K) R) P)
L)
PHOTO:
in the interests of user-safety the set should be restored to its original condition and only parts identical to those specified be used.
TO CONTENTS
SPECIFICATIONS . . . . . . . . .
STRINGING OF DIAL CORD . . . .
NAMES OF PARTS . . . . . . . , . . .
DISASSEMBLY . . . . . . . . . . . . . .
BLOCK DIAGRAM . . . . . . . . .
CIRCUIT ADJUSTMENT . . . . . . . .
MECHANICAL ADJUSTMENT . . . .
EXPLODED VIEW . . . . . . . . .
SCHEMATIC DIAGRAM . . . . . .
WIRING SIDE OF
. . . .
NOTES ON SCHEMATIC DIAGRAM
TYPES OF TRANSISTOR AND LED
REPLACEMENT PARTS LIST . . . . .
r
Page
2
........
2 3
........
4
. . . . . . . .
5
. . . . . .
6-8
. . . . . 8
. . . . .
9, . . .
. . . . .
. . . . . . 15
. . . . . . .
. . . . .
16-19
Page 2
PLEASE REFER TO THE OPERATION MANUAL
GENERAL Power source:
Output power:
impedance:
Loaded impedance:
Dimensions:
Weight:
AC 240
50 Hz
DC 9
or R20
6) PMPO; 20W (low (AC operation) MPO;
(4W + (AC operation) RMS; (DC operation, 10% distortion) External mic; 600 ohms Headphones; 8-25 ohms External speakers; 4-8 ohms
Width; 494 mm
Height; 180 mm Depth; 130 mm
2.8 kg (6.2
without
RADIO Frequency range:
TAPE RECORDER Tape: Frequency response Signal/noise ratio: Wow and flutter: SPEAKER Speakers:
Impedance: Maximum power
handling capacity:
FM; 87.6
108 MHz
AM; 526.5
Compact cassette tape 100 Hz
10,000 Hz
36 dB
0.2% (WRMS)
woofer
2
Horn type tweeter
2
4 ohms
5
(maximum)
batteries
Specifications for this model are subject to change without
prior notice.
CORD
Cord Assembly
1. Wind the dial cord over the tuning control and attach the tuning control to the front cabinet.
2. Set the dial cord over the boss (A).
3. Set the dial cord over the bosses (B) and
Tuning control shaft (Knob)
Dial
Point
Figure
Page 3
PARTS
Cassette Compartment
2. Headphone Jack
3. Volume Control
4. Balance Control
5.
Power Indicator
6. FM Stereo indicator
7. Tuning Control
8. Function Selector Switch
9. Record Button Play Button
11. Rewind Button
12. Fast Forward Button
13. Stop/Eject Button
14. Pause Button
15. Graphic Equalizer Control
16. Speaker Cord Holder
17. Speaker Release Lever
18. External Microphone Jack
19. External Speaker Terminals
20. Telescopic Rod Antenna 2
Battery Compartment
AC Power Supply Socket
18
19
21 22
Figure
1
Figure 3-2
Page 4
Caution on Disassembly
notes
disassembling
and reassembling it, to keep its safety and excellent
1. Take
out
unit.
2.
Be sure to remove
supply
outlet before starting to disassemble the unit and remove the batteries from the unit.
3. Take off nylon bands or wire holders where they need be
disassembling
unit.
servic-
be sure
rearrange
leads
before disassembling.
4. Take sufficient care on static electricity of integrated cir­cuits and other circuits when servicing.
Note:
Set the mechanism in such a way as that the record/playback selector lever is
Fig.
Figure
1
Figure 4-4
Figure 4-2
Figure 4-3
Page 5
FUNCTION SELECTOR SWITCH
RECORD/PLAYBACK SWITCH
Figure 5 BLOCK DIAGRAM
Page 6
(TUNER SECTION
AM
ADJUSTMENT
Test AM
.
POSITION
AM
SIGNAL
Hz, 30%. AM modulated
GENERATOR
TEST
STEP STAGE
REMARKS
SETTING MENT
1
IF
455 kHz
High
Adjust for
frequency best “IF”
2
510
Lowest L8
Band
frequency
Adjust for
coverage
maximal
3
1,650
Highest
TC8 output.
Repeat steps 2 and 3 until no further improvement can
Figure
1 AM IF
455
Figure
2 AM IF CURVE
Signal Generator
Test
Loop
Bar Antenna
Figure 6-3 AM RF
Figure
4 ADJUSTMENT POINTS
Page 7
FM IF/RF ADJUSTMENT
10.7 MHz
Oscilloscope
FM mono
SIGNAL GENERATOR
400 Hz, 30%. FM modulated.
TEST
STAGE
AD-
JUST-
REMARKS
1. Using a driver, turn
the core of
counter-
clockwise
before taking it out of the bobbin.
2. Adjust for
“IF”
curve.
Adjust for best “S” curve.
Figure 7-l FM IF
1
IF
MHz High
frequency
Figure 7-2 IF CURVE
Figure 7-3 FM
CURVE
Detection
Electronic
Repeat steps 1 and 2 until no further improvement can
FM
External
Voltmeter
Rod Antenna
Generator
Speaker
Terminal
Unit
be made.
Band
frequency
coverage
109 MHz
Highest
TC2
maximal output.
frequency
Repeat steps 4 and 5 until no further improvement can be made.
88 MHz
L2 Adjust for
108 MHz 108 MHz
output.
Repeat steps 7 and 8 until no further improvement can
be made.
5
Dummy (See Figure
6
7
Figure 74 FM RF
Electronic FM Generator
Rod Antenna
9
VCO FREQUENCY ADJUSTMENT
Dummy
Figure
SIGNAL
400 Hz, 30%. FM modulated
GENERATOR
Figure 7-5 VCO FREQUENCY
To Telescopic Rod Antenna
FM mono position
98 MHz at
98 MHz
60 dB
FM stereo position (unmodulated)
Adjust for
38.00
+ 100 Hz.
To Chassis
500hms
5.
Output impedance of signal generator
Figure 7-6 FM DUMMY
Page 8
SECTION)
SETTING
. Volume control. Maximum
POSITION
l
control: Center
OF SWITCH
l
Balance control. Center
AND KNOB
l
Tape
ITEM INPUT
MENT
REMARKS (CHECK)
POINT
PLAY BACK
Test tape
(1.2 V
AMPLIFIER
MTT-118
SENSITIVITY
ITEM
JIG
Driving power
Torque
meter
Fast-forward
TW-223 1
Rewind
TW-223 1
Azimuth
Tape speed
ADJUSTMENT
POINTS
I
Test Tape
Azimuth
adjusting screw
External
Oscilloscope
Test Tape MTT-118
Head
Figure
1
PLAYBACK AMPLIFIER SENSITIVITY
(More than 140
30
60
(Fast-forward:
55
(Rewind:
Sine waveform attains the
maximum.
3,000
Hz
Test MTT-1
ELECTRONIC VOLTMETER
External
‘ape
Head
AZIMUTH
External Speaker
Test Tape MTT-111
, Record/Playback
Head
3
Page 9
1
I
2
I
3
I
4
I
5
I
6
63
57x3
73
Page 10
203
605
GRAPHIC
238
21
Figure
CABINET EXPLODED VIEW
Page 11
RIPPLE FILTER
l
NOTES ON SCHEMATIC DIAGRAM can be found on page 15.
2
3
I
4
I
6
Figure 11
Page 12
MAIN
GR
GRAPHIC
GR
I
POWER SUPP
LY
I
11
12
1
SCHEMATIC
DIAGRAM
Page 13
1
I
2
3
I
4
I
5
I
6
Figure
WlRiNG
Page 14
7
I
8
I
9
IO
I
II
I
GRAPHIC EQUALIZER PW
7
I
8
I
9
I
IO
II
I
SIDE OF
Page 15
SCHEMATIC
l
Resistor:
To differentiate the units of resistors, such symbol K and
means 1000 ohm and the symbol
ohm-type resistor. Besides, the one with “Fusible” is a fuse
Capacitor:
To indicate the unit of capacitor, a symbol
is used: this
symbol
means micro-micro-farad and the unit of the capacitor without such a symbol is microfarad. As to elec­trolytic capacitor, the expression “capacitance/withstand voltage” is used.
(CH), (TH), (RH), (UJ): Temperature compensation
8
000
0
l
The indicated voltage in each section is the one measured
by Digital
between such a section and the
chassis with no signal given.
Marking except
for
FM
mode
. Schematic diagram and Wiring Side of P.W.Board for this
model are subject to change for improvement without
prior notice.
l
Parts marked with
are important for main­taining the safety of the set. Be sure to replace these parts with
ones for maintaining the safety and perfor-
mance of the set.
Figure
TYPES OF TRANSISTORS AND LED
Page 16
REPLACEMENT PARTS LIST
“HOW TO ORDER REPLACEMENT PARTS”
To have your order filled promptly and correctly, please furnish the following information.
1. MODEL NUMBER
2.
REF. NO.
3. PART NO.
4. DESCRIPTION
NOTE:
Parts marked with
are important for maintaining the safety of the set.
Be sure to replace these parts with
specified ones for maintaining the safety and performance of the set.
ICI
Q701
Q704
D301
D303
CF2
PART NO.
CODE
PART NO.
DESCRIPTION
CODE
INTEGRATED CIRCUITS
CONTROLS
VH
FM Front-End, TA733.5 FM IF/AM Circuit, AN7224 PLL FM Stereo Multiplex,
TA7343 Pre Amp., M51 Power Amp.,
AG AH AG
AG AU
TRANSISTORS
VS2 SD655
1
NPN, Silicon, NPN, Silicon, NPN. Silicon, NPN, Silicon, NPN, Silicon. NPN. Silicon. NPN,
AC AB AB A8 AB AB AB
Variable Capacitors, Tuning
with Trimmers:
FM RF Trimmer
TC8; AM Oscillator Trimmer
5 kohms(B)
50 kohms (G) 20 kohms (U)
100 kohm (B)
ELECTROLYTIC CAPACITORS
[All
electrolytic capacitors are
type.)
DIODES
Silicon, 1 Silicon, 1 Silicon, 1 Silicon, 33 Silicon, 1 SS133 Silicon, 1 LEO, Red, LED, Red, Zener, Silicon,
SS133
JB2-1
Zener, 5.1
RD5.1 JB2 Silicon, Silicon, Silicon. Silicon,
AA
AA AA AA AA AC AC AB AA AA AB AB AB AB
COILS
FM Band Pass Filter FM RF FM Oscillator AM Bar Antenna AM Oscillator
TRANSFORMERS
AD AA AA AH AC
FM IF FM Detector
AM IF
A Power
FILTERS
AC AC AC
AT
Ceramic, FM IF 10.7 Ceramic, AM IF, 455 kHz
AD AD
Cl 2 Cl 5
C25 C26
c41 C42
c47 C48 c49 c74
Cl 17 Cl 18
Cl 21 Cl25 Cl26 Cl 34 Cl 42
c212 C213 C214 C215 C216 c219
c221 C223 C224 C727 C728
A
RC-EZAI
A A
RC-EZAI
A
RC-EZAI
A A A
RC-
A
RC-EZAI
A
A
A A A A
RC-
47
10
16V
47
100
1OV
4.7
10
16V
3.3
25V
1
50V
4.7
25V 1 PF, 50V 1 PF, 50V
220
1OV
10
16V
47
1OV 100 100
3.3
25V
3.3
25V 10
16V 470 47
1OV 100 10
16V 47 PF. 16V 22
1
50V
1 PF, 50V
33
16V 33
16V 47
1OV
330
16V 47 47
1OV
220
1OV 220 2200
16V
0.22
50V
0.22 50V
PF, 50V
AL
AB AD
AF AE
AB AB AB
AB
AB AB AB
AB
AB
AB
AB AB AB AB AB AB AB AB AB AB AB A8 A8 AB
AG
AB AB AB AB AB AC AB AB A8 AB AE AB AB AB AB
Page 17
PART NO. DESCRIPTION
CODE
47
16V
AB
c731
1
50V
C732
1
50V
c733
3.3
25V
c734
3.3
25V AB
4.7
CAPACITORS
There
are two types of
available and they can be Identified from each
other by
Part Numbers.
l
its Part Number
is
at
its
l
The
capacitance error of each capacttor is Indicated by the symbol given at the
13th digit of the Part Number as
(f0.25
“D” j&O.5 (Tubular type ceramic-capacnor is Identitled by the symbol MF of the part No. VCOOMFOOOOOOO;
this MF does not mean the lead
Cl
Cl 9 c21 c22 C23 C24
c43 c45 C46 c73 c77 Cl 03
Cl 05
06 Cl 07 Cl 08 Cl 11 Cl 12 Cl 22 Cl 24 Cl 29 Cl 30 Cl 31 Cl 32
Cl 37 Cl38
c217 C218 c222
L18OJ 18
50V
0.0047
50V
VCTYMFI
0.0047
50V 22 pF(CH), 50V 22
RH), 50V
33 pF(CH), 50V
3.9 pF(CH), 50V
VCTYMFl
0.0047
50V
VCTYMFl
16V
f*F,
VCTYMFI
0.01
25V
VCTYMFI
16V
16V
VCKYMFl HB221
220
50V
CY223 VCTYMFl VCTYMFI
16V
VCTYMFl
12V
VCTYMFl
12V
VCTYMFl
6.8 pF(RH), 50V
J
50V
HLl 01
100
50V
0.001
50V
VCKYMFl
50V
VCTYMFl
0.0015
50V
52K 0.0015
50V 25V 25V
VCTYMFI
0.01
25V
16V
VCKYMFI HB821
820
50V
HB821
820
50V
47
50V
47
50V
VCTYMFl
PF. 16V
PF.
0.01
16V
VCKYMFI
50V
VCKYMFl
PF. 50V
0.1
25V EXI 04K 0.1 FF, 25V EXI 52K 0.0015
0.01
50V
0.01
50V
0.01
50V
0.01
50V
AA AA AA AA AA AA AA AA AA AA
AA AA
AA AA AA
AA AA
AB
AA AA
AA
AA AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
PART NO. DESCRIPTION
CODE
0.0082
25V
AA
0.0082
25V
AA
PF. 50V
AA
VCKYMFl
PF. 50V
AA
HB561
560
50V
AA
C712
VCKYMFI HB561
560
50V
AA
c715
VCTYMFl
AA
C716
VCTYMFl
AA
C721
VCTYMFI
0.0082
25V
AA
C722 VCTYMFI
0.0082
25V
AA
0.0015
50V
AA
RESISTORS
(Unless othenwse specified, resistors are
carbon type.)
(Tubular type carbon film resistor
is identified the symbol MF of the part
No. VRD-MFOOOOOOO: this MF does not mean lead wire.)
0 ohm,
ohms, AA
1
R65
1
RI 13
RI 29
RI 43
RI 50
82J
Jumper 680 ohms, 820 kohms,
5.6 kohms,
8.2 kohms.
2.7 kohms, 68 ohms, 470 ohms,
1.5 kohms,
470 ohms,
1 kohm.
10 kohm, 220 kohms. 470 ohms,
3.3 kohms.
3.3 kohms,
1 kohm,
1 kohm,
ohm, 470 ohms, 47 ohms,
100 ohm,
1.8 kohms,
8.2 kohms,
8.2 kohms. ohm,
100 ohm,
2.2 kohms,
2.2 kohms,
kohms, 12 kohms, 15 ohms, 15 ohms,
1.8 kohms, 47 kohms,
47 kohms,
1.2 kohms,
2.2 kohms, 47 kohms, 47 kohms.
1.2 Mohms, 33 kohms, 1 kohm. 39 kohms, 39 kohms,
1.8 kohms,
1.8 kohms,
3.3 kohms,
3.3 kohms, 220 ohms, 220 ohms,
AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA
AA AA AA AA AA
AA AA AA
AA
AA AA
AA AA
AA
AA AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
Page 18
PART NO.
DESCRIPTION
2.2 ohms, 1
2.2 ohms,
J
150 ohms,
J
ohms,
3.3 kohms,
3.3 kohms, 47 kohms, 47 kohms,
47 kohms, 47 kohms, 47 kohms,
47 kohms,
2.7 kohms,
2.7 kohms, 22 kohms,
22 kohms,
22 kohms,
22 kohms,
15 kohms, 15 kohms, 12 kohms,
12 kohms,
12 kohms, 12 kohms,
J
270 ohms,
J
270 ohms,
3.9 kohms,
3.9 kohms,
680 kohms,
680 kohms,
1.2 kohms,
1.2 kohms, 220 ohms, 820 kohms, 820 kohms,
J 560 ohms, J
560 ohms,
4.7 kohms,
4.7 kohms,
CODE
PART NO.
DESCRIPTION CODE
AA AA AA AA AA AA AA AA AA AA AA AA AA
AA AA AA AA AA AA AA AA AA AA AA
AA AA AA AA AA AA AA AA AA AA AA AA AA AA AA
CIRCUIT PARTS
CNP102
01
Ml
Connector Assembly, 3Pin Connector Assembly,
36CAFZZ Plug, 3 Pin
Plug, Jack External Microphone Jack Headphones
Motor, Assembly Socket,
Power Supply (with AC/DC Selector Switch)
Speaker, Woofer Speaker, Ceramic Tweeter Switch, Slide Type Switch,
Type
ACV Switch, Leaf Type
AD
AC AB AB A8 AE AE AT AH
02
SW401
AM
AC AH AF AD
MECHANICAL PARTS
83
1
Main Chassis
2
Switch Plate
AC
3
501 Push Button Actuator Ass’y AD
4
Lever, Record Button
AC
5
Lever, Play Button AC
6
Lever, Rewind Button AC
7
Lever, Fast Forward Button
AC
8
Lever, Stop Button
AC
9
Lever Ass’y, Pause Button AD
11 12 13
15
16 17
19 20 21 22
24
8290110 25 26 27 28 30
31 33 34 35 36 37 39 40
42 44 45
A 46 47 48
49 50 51 52
94 RI 82910302
53
94 RI 8000201
54
55 56 57 59
94 RI 7200905 62 63 64 66 67 70 71
94 73
Lever, Rewind AC Lever, Pause
AC
Spring, Pause Lever
AB
Stopper, Pause
AA
Button Lever
AB
Sub-Chassis AD
Spring, Play Button Lever AB
Switch Actuator AC
Spring, Actuator AB
Lever, Auto
AC Auto Lever AB Button Lever AB
Stopper
AC
MG Arm AB
Head Panel
AD
Head Base AC
Sensing Plate Ass’y
AD
Spring, Head Panel
AB
MG Arm
AC
Screw, P.M.
AA
Spring,
AB
Pinch Roller Arm Ass’y
AG
Spring, Pinch Roller MS Screw
AC
RF Pulley Arm Ass’y
AH
Spring, RF Pulley Arm
AB AB
RF Belt
AG
Flywheel Ass’y
AK
Reel Base Ass’y
AG
Take-Up Gear Plate Ass’y
AD
Gear, Take-Up Roller
AB
Plate Spring,
AB
Gear, Fast Forward
AB
Spring, Back Tension
AB
Supply Reel Ass’y
AF
Take-Up Reel
AF
Lever, Record Safety
AC
Spring, Back Tension
AB
Bracket, Motor
AE
Rubber, Motor
AA
Screw, Motor
AA
Belt, Main
AG
Lever, Eject Slide
AC
Spring,
Slide Lever
A8
Plate Spring, Pack
AC
Head,
AM
Head, Erase
AG AA AA AA
74 75
94 R90040000 77 78 82
94
Tams Screw,
X Tapping Screw, Tapping Bind Screw,
X
Screw,
X
Screw,
X
Screw, (p2 X
Screw, Azimuth
Washer,
X
X
Washer,
X
X
AA AA
AA AA AA
AA
84
Washer,
X AA
85
Washer,
Lever, Operation Frame Shaft, Button Lever Screw, Screw,
X
AA
87 88
89
90
96
AC
AF AD AA AA
18
Page 19
DESCRIPTION
CODE
101
Bracket, Button Lever Shaft AB
102
Bracket, Record
AB
Nylon Band
AA
NET
PARTS
201 CSPRTI
Dial Cord Assembly
AD
202
Front Cabinet Assembly. (BK) AV
202
Front Cabinet Assembly, (R) AV
202
Front
Assembly, (P) AV
202
Front Cabinet
AV
202
Front Cabinet Assembly,
Front Cabinet, (BK)
203 203 203 203 203 204
204
204
204
205
205
205
205
206 206 206 206 206 207
208 208
A-RD 208 208 208 209 210
Front Cabinet, (R) Front Cabinet, (P) Front Cabinet, Front Cabinet, (BL) Operation Plate
AK
HDECAOGI
Decoration Plate, Graphic AG
Equalizer, (BK)
HDECAOGI SAFSE Decoration Plate, Graphic
AG
Equalizer, (P)
AG
HDECAOGI SAFSD Decoration Plate, Graphic
Equalizer,
AG
AG
Equalizer,
Operation Plate, Mechanism AC
1
AC
Speaker Front Cabinet, (BK) AM
A-RD Speaker Front Cabinet (R)
AM
Speaker Front Cabinet (P)
AM
Speaker Front Cabinet,
AM
Speaker Front Cabinet. (BL) AM
Speaker Back Cabinet, Left, AM
BLRD Speaker Back Cabinet, Left,
AM
Speaker Back Cabinet, Left, (P) AM
Speaker Back Cabinet, Left,
AM
Speaker Back Cabinet, Left, AM
Speaker Back Cabinet, Right, AM
BRRD Speaker Back Cabinet, Right, AM
Speaker Back Cabinet, Right, AM
Speaker Back Cabinet, Right, AM
Speaker Back Cabinet, Right, AM
B-BK
Back Cabinet, (BK) Back Cabinet,
PK
Back Cabinet, (P)
Back Cabinet,
Back Cabinet, (BL) AQ Cassette Holder Assembly AH Cassette Holder Operation Plate, Cassette
Holder
Battery Compartment Lid, (BK) Battery Compartment
(R)
Battery Compartment Lid, (P)
Battery Compartment Lid,
Battery Compartment Lid, (BL)
Dial Pointer
Handle, (BK)
AC
AD AD AD AD AD
AB AE
PART NO.
DESCRIPTION
CODE
210
210 210 210 211 212 213 214 215 216 217
218 219 220 221 222 223
224 226 227 228 229 230 231 232 233 234 238 238 238 238 238 601 602 603 604 605 606
Handle,
AE
Handle, (P)
AE
Handle,
AE
Handle, (BL)
AE
Knob, Band Selector
AB
Knob, Volume
AB
Knob, Balance
AA
Button, Mechanism Operation AB
Knob, Tuning Knob, Graphic Equalizer Bracket, Mechanism
Retaining
Damper
Spring, Batten/
Spring, Batten/ Spring, Battery Spring, Cassette Holder Up Spring, Record/Playback
Drum
Felt, Cabinet 70mm
AFZZ FM Telescopic Rod Antenna
Speaker Cord
1 CEFW Lug Terminal,
Core
Cushion, FM RF/Osc. Coil
Tip, with Lead Wire A Label, Specifications, (BK) A
Label, Specifications, (R) Label, Specifications, (P) Label, Specifications, Label, Specifications, (BL) Screw with Washer Screw,
X 25mm
X
Screw,
X 1Omm
Screw,
X
Screw,
X
ACCESSORIES/PACKING PARTS
Sheet, Cassette
AC Power Supply Cord
Label, Special Feature,
Cassette Holder
A Operation Manual
Warranty Card
A Packing Case, (BK)
A
Case, (R) Case, (P) Case, Case, (BL)
AE
AB
AC AB AA AA AA AB
AE AA AA AM AC AA
AA
AB AA AB
AB
AB
AB
AB
AB
AA AA AA
AA
AA
AA
AL
AC
AC
AA
AN
AN AN AN
AN
A
Label, Caution, (BK), (R), (BL) AC Label, Caution, (P),
AC
Packing, Add., Unit
AF
Polyethylene Bag, Operation AA
Manual
Polyethylene Bag, Unit
AB
Polyethylene Bag, Speaker AB
Add., Speaker
Replacement Item)
MAN01 Main/Power Supply PWB
(Combined
Assembly)
PWB-
Graphic Equalizer PWB
Page 20
SHARP
Writer and Editor:
Quality
Reliability Control Center of Audio Systems Group, Sharp
Printed in Japan
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