Page 1
OUTSTANDING RECEPTION THE WORLD
067DCK
Photograph of RT-31
Notice: You can make use of the item “DISASSEMBLY”,
regardless of the difference in appearance of the set,
whose photographs are all those of Model
(not RT-31 for SEC.)
Power source:
Power consumption:
Semi-conductors:
Dimensions: Width;
Height;
Depth;
Weight:
Tape:
Tape speed
Wow
flutter:
Frequency response:
Normal tape;
H/HB)
Normal tape;
AC 11 OV/22OV/24OV,
Hz
(RT-31
AC
50/60 Hz (RT-31)
12 wattes (RT-31
wattes (RT-31)
7
(Integrated Circuits)
12 Transistors
9 Diodes
6
(Light Emitting Diodes)
430 mm (16-15116”)
1 15.5 mm
6”)
237 mm
6”)
3.9 kg (8.6
(RT-31 H/HB)
3.7 kg (8.2
Philips standard compact cassette
tape
4.8 cm/set.
0.19% (DIN 45 500)
0.06%
H/HB)
0.065% (W.R.M.S.)
40
12,500 Hz (DIN 45 500)
30
14,000 Hz
SYSTEM
Noise reduction system manufactured under license
from Dolby Laboratories Licensing Corporation.
“Dolby” and the double-D symbol are trademarks of
Dolby Laboratories Licensing Corporation.
and
In the interests of user-safety the set should be
restored to its original condition and only parts
identical to those specified by used.
MAXELL
tape;
H/HB)
40
13,000 Hz
3
MAXELL
tape;
30
15,000 Hz
40
13,009 Hz
3
TDK Metal tape; 40
16,000 Hz (DIN 45 500)
(RT-31 H/HB)
40
14,000 Hz
3
SONY
tape; 40
14,000 Hz (DIN 45 500)
H/HB)
40
13,000 Hz
3
S/N ratio (MAXELL
tape):
Dolby
off;
56
Dolby
on; 66
(at over 5
Input sensitivity and input impedance:
Microphones;
0.2
(6.8K ohms)
Line in;
50
(50K ohms)
DIN input;
0.2
ohms) (RT-31 H/HB)
Output level and loaded impedance:
Headphones;
46
(“0”
, 8 ohms
Line out; 550
dB), 50K ohms
DIN output; 550 mV
dB), 50K ohms
(RT-31 H/HB)
Specifications are subject to change without prior notice.
Page 2
(Photographs of RT-31H)
Prior to the disassembly, be sure to remove the AC supply
cord from a wall outlet and the input/output plugs from the
rear of the set. Take out a cassette tape, if loaded in the
cassette compartment,
REMOVAL OF CABINET
(See Figures
and
From the cabinet, remove four screws two each at its
right and left sides, and one screw at its rear surface.
Then take the cabinet off.
Figure 2-l
n
REMOVAL OF BOTTOM PLATE
(See Figure 2-3)
Turn the set upside down, remove two screws from the
bottom plate, and take the bottom plate off by shifting
it in the arrow direction.
n
REMOVAL OF FRONT PANEL
(See Figures 2-4 and 2-5)
Remove four screws from the front panel.
2 Push down three stoppers at the upper surface of the
front panel, See that the front panel is now free from
the stoppers.
Pull the front panel frontwards.
Figure 2-4
n
REMOVAL OF MECHANISM BLOCK
(See Figures 2-6 and
Note:
Be sure to open the cassette compartment lid before
disassembling the mechanism block,
1
Remove two screws from the bottom of the set.
2 Remove two screws from the rear of the mechanism
block.
Detach the tape counter belt from the tape counter.
4 Remove the record/playback selector switch rod.
5 Remove four sockets from the mechanism block P.W.
board. Then separate the mechanism block from the set.
Figure 2-2
Figure 2-3
Figure
Figure
Page 3
Figure 3-l
Figure 3-2
REMOVAL OF FRONT PANEL CHASSIS
(See Figures 3-2 and 3-3)
Pull out two record level control knobs
Remove one nut from the record level control,
Remove two screws.
Remove eight screws.
Remove one screw. Then the front panel chassis can be
separated from the set.
n
REMOVAL OF METER P.W. BOARD
(See Figure 3-3)
Push outward six tabs on the meter
board holder,
and remove the meter P.W. board.
Figure 3-3
(Use of RT-31H/HB)
The unit is designed to operate from
or
AC mains.
Check the voltage selector setting on the rear panel before
connecting with the AC supply cord.
Adjust the voltage selector to match your local AC power
The voltage selector is located on the rear panel of the unit.
If adjustment is necessary, use a screwdriver in order to turn
the selector in either direction until the correct voltage in the
window next to the adjusting screw.
Figure 3-4
CAUTION
H/HB)
If any one of the nylon bands shown in the Figure 3-5 is
once removed for some reason, be sure to reprise it to the
original place in the same appearance as before.
Figure 3-5
Page 4
Pinch Roller Spring
Figure 4-l
n
PINCH ROLLER PRESSURE ADJUSTMENT
(See Figure 4-l and 4-2)
Place the unit in play mode,
2. Use a tension gauge (0
500
to push it to a part
of the pinch roller until the pinch roller comes away
the capstan. Next gradually weaken the force in the
reverse direction until the pinch roller hits the capstan
(that is, it begins rotating), then see that tension gauge
is reading 295 to 365 grams.
3. Make sure there are clearances
,
between
the pinch roller lever and sub. chassis.
4. If the above value is not satisfied, adjust the pinch roller
pressure spring by bending it, or replace.
n
TORQUE CHECK AT PLAY, FAST FORWARD AND
REWIND MODES
1. Put a torque measuring cassette into the set.
2. The torque values, in each mode must be as tabulated
below.
n
TAPE SPEED ADJUSTMENT
1. Using a test tape (TEAC, MTT-113C, 8
recorded), play it back at the midpoint but not at the running
start or end point.
2. Connect a frequency counter to the line output socket.
3. Use a bladed screwdriver to adjust, through the adjusting
hole at the bottom of motor, the semivariable resistor
so that the frequency counter reads 2975 to 2995 Hz.
TEST
TAPE
MTT-1
PLAYBACK Mode
Frequency Counter
13c
000
RECORD/
PLAYBACK
HEAD
Line output socket (SO3 or S04)
Figure 4-3
Page 5
BIAS CURRENT AND BIAS OSCILLATION FREQUEN-
CY ADJUSTMENT OF RECORD AMPLIFIER
(See Figure 5-l)
SW7 is not used for model
Connect VTVM between the test point
(or
and ground.
2. Connect the vertical input terminal of oscilloscope to
the VTVM and its horizontal input terminal to CR
oscillator.
3. Apply the signal
from the CR oscillator to the
unit, and push the tape selector switch SW4.
4. Place the unit in record mode and adjust bias oscillation
coil
so that the bias oscillation frequency is
while watching Lissajous’ figure on the oscillo-
scope.
5. Push tape selector switch
6. Adjust semi-variable resistor VR301 (ro VR302) so that
VTVM indicates 70 mV.
7. Make sure the indicated value of VTVM varies according
to each position of tape selector switch as tabulated
below.
n
ERASE VOLTAGE CHECK
(See Figure 5-2)
Connect VTVM between test point
and
2. Connect oscilloscope to the output terminal of VTVM,
3. Push the tape selector switch SW6.
4. Place the unit in record mode, then see that VTVM is
value 210
n
RECORD/PLAYBACK HEAD AZIMUTH ADJUSTMENT
(See Figure 5-3)
Connect VTVM between the test point TP103 (or
TP203) and ground.
2. Push the tape selector switch SW4 and set the Dolby
switch SW3 at off position.
3. Put a test tape (TEAC, MTT-114,
kHz, 250
-10
recorded) into the unit and play it.
4. Adjust the head azimuth adjusting screw so that the
indicated value of VTVM reaches the maximum and a
difference in phase becomes as small as possible.
PLAYBACK FREQUENCY CHARACTERISTIC CHECK
(See Figure 5-4)
1. Connect VTVM to the line output socket.
2. Push the tape selector switch SW4 and set the Dolby
switch SW3 at off position.
3. Put a test tape (TEAC,
12.5
kHz/
40 Hz, 250
-10
recorded) into the unit
and play it.
4. See that VTVM is showing the deviation of two different
input signals (40
and 12.5
against the 1
input, as tabulated below.
Posit ion
Switch Indicated value
I
normal
Push SW4
37
Fe
Push SW7
Push SW5
41
52
Figure
Figure 5-2
Figure 5-3
Test Tape
With 40 Hz input
Deviation against 1
input
shown by VTVM
With 12.5
input
-3
to 4
I
Figure 5-4
Page 6
PLAYBACK SENSITIVITY ADJUSTMENT
(See Figure 6-l
1. Connect VTVM between test point
(or TP203)
and ground.
2. Push the tape selector switch SW4 and set the Dolby
switch SW3 at off position.
3. Put a test tape (TEAC, MTT-150,400 Hz, 200
recorded) into the unit and play it.
4. Adjust semi-variable resistor
(or VR201) so that
580 mV will be indicated on VTVM.
n
RECORD/PLAYBACK SENSITIVITY ADJUSTMENT
(See Figure 6-2)
SW7 is not used for model RT-31H.
1. Connect VTVM between test point TP103 (or TP203)
and ground.
2. Connect CR oscillator to the line input socket, and
apply the signal of oscillation frequency 400 Hz, output
level -13
(0
V) to the unit.
3. Push tape selector switch SW4 and set the Dolby
switch SW3 at off position.
4. Put a normal tape (TEAC, MTT-502, blank) into the
unit, and place it in record mode. Adjust the record
level control VRIOZ (or VR202) so that the reading
of VTVM becomes 390 mV.
5. Playback the normal tape which has been recorded
in the step 4, and adjust the semi-variable resistor
comes 410 mV. Repeat the steps 4 and 5 until the
VTVM reading stays in the range from 360
to
460
6. Put a
tape (MAXELL, UDXL
into the unit.
7. Push the tape selector switch SW5, and place the unit in
record mode.
8. Playback the
tape which has been recorded in the
step 7, and make sure VTVM indicates the reading
within 326 mV to 487 mV.
PEAK LEVEL DISPLAY METER SENSITIVITY ADJUST-
MENT
(See Figure 6-3)
Connect VTVM between test point TPI 02 (or
and ground.
2. Set the Dolby
switch SW3 at off position and
input selector switch SW2 at “LINE” position.
3. Connect CR oscillator to the line input socket, and
apply the signal of oscillation frequency
316
(-10
to the unit, placing it in record mode.
4. Adjust record level control VR102 (or VR202) so that
VTVM will indicate 580 mV (-4.7 dB).
5. Change the output level of CR oscillator from 316
(-10
to 305 mV (-10.3
then adjust the
segments
up to 0
of the peak level display
meter light up.
6. Again change the output level of CR oscillator from
305 mV (-10.3
to 295 mV (-10.6 dB), then see
that the segments up to -3
remain lit.
n
DOLBY NOISE REDUCTION CIRCUIT CHECK
(See Figure 6-4)
1. Connect VTVM between test point TPI 03 (or
and ground.
2. Push the tape selector switch SW4, and set the input
selector switch
at LINE
switch SW3 at off position.
3. Connect CR oscillator to the line input socket, and
apply the signal of oscillation frequency
Hz, output
level -35
(0 1
to the unit.
Figure 6-l
9. Put a metal tape (TDK, AC-71
into the unit.
Push the tape selector switch SW6, and place the unit
in record mode.
11. Playback the metal tape which has been recorded in the
step
and make sure VTVM indicates the reading
within 326
to 487 mV.
12. Put a Fe-Cr tape (SONY, CS-30) into the unit.
13. Push the tape selector switch SW7 and place the unit
in record mode.
14. Playback the Fe-Cr tape which has been recorded
in the step
and make sure VTVM indicates the
reading within 326 mV to 487 mV.
Figure 6-2
Figure 6-3
Frequency
12.5
Indicated
45.7 to 44.5 to 42.6 to
Value 81
70 mV 68.2 mV
Table
Frequency
1
12.5
Indicated
8.2 to 13.7 to 13.5 to
Value 16.4
24.9 mV 23.4 mV
Table 2
Figure 6-4
Page 7
4. Put a normal tape into the unit and place it in record
mode. Adjust the record level control
02 (or
6. Give the set the
of oscillation frequency 100 Hz,
output level -50
1 Vi, then adjust the record
indicate 32.6
5. Give the set signal,
signal and 12.5
level control VR102 (or VR202) so that VTVM will
indicate 5.8 mV.
signal one after another, then see that VTVM indicates
the reading listed in Table 1.
7. In the same manner as in the step 5 give the set 1
signal,
signal and 12.5
Consequently, make
sure VTVM indicates the reading listed in Table 2.
Figure 7-l
VIEW
Page 8
I
2SCl214C
I
MARKING SIDE
(Specifications or wiring diagrams of this model
2
I
NOTES:
0702 2SD794P
are subject to change for improvement without prior notice.)
3
I
4
5
6
Figure 9 SCHEMATIC
Page 9
8
9
11
12
A3_= 2SC945AP
Parts marked with
are
1. Resistor:
2. Capacitor:
for maintaining the safety of the
To differentiate the units of resistors, such
To indicate the unit of capacitor, a symbol
set. Be sure to replace these parts with
symbols as
and M are used; the symbol
used; this symbol
means
specified ones for main taining the
means 1000 ohm and the symbol
means
and the unit of the capacitor without
safety and performance of the set.
ohm and the resistor without any
symbol
is
microfarad.
As to
symbol is ohm-type resistor. Besides, the one
capacitor,
the expression
“capacitance/wit
with “Fusible” is a fuse type.
stand voltage” is used.
is
ic
h-
I
7
8
9
10
11
12
TIC DIAGRAM
_--____
Page 10
1
2
3
4
5
-
1
2
3
4
I
5
Figure 11 WIRING SIDE OF PRINT
Page 11
7
9
10
11
12
A
II
------
7
8
I
9
10
11
12
PRINTED WIRING BOARD
-12-
Page 12
2
3
4
5
6
A
a70
MARKING SIDE
2SCl214C
NOTES:
Pa
(Specifications or wiring diagrams of this model are subject to change for improvement without prior notice.)
I
2
I
3
I
4
I
5
6
Figure 13 SCHEMATIC
Page 13
I
2SC945AP
l
I
I I
‘ES: Parts marked with
are
1. Resistor:
2. Capacitor:
for maintaining the safety of the
To differentiate the units of resistors, such
To indicate the unit of capacitor, a symbol
set. Be sure to replace these parts with
symbols as
and M are used; the symbol
used; this symbol
means micro-microfarao
specified ones for main
the
means 1000 ohm and the symbol M means
and the unit of the capacitor without suer
safety and performance of the set.
ohm and the resistor without any
symbol
is
microfarad. As to electrolytic
is ohm-Woe resistor. Besides. the one
capacitor, the expression “capacitance/with
with “Fusible” is a fuse type.
stand voltage” is used.
7
8
I
11
12
DIAGRAM
-14-
Page 14
,
2 3
4
5
I
Figure 15 WIRING SIDE OF
Page 15
7
8
9
10
11
12
I
LEFT
.
I
8
9
I
10
I
11
I
12
WIRING BOARD (RT-31)
Page 16
TOP
BOTTOM
Figure 17 MECHANISM EXPLODED VIEW
Page 17
1
2
3
4
5
6
,
1
A
2
3 4
5
6
Figure 18 CABINET EXPLODED VIEW (Use of
Page 18
REPLACEMENT PARTS LIST
REF. NO.
PART NO.
DESCRIPTION
CODE
INTEGRATED CIRCUITS
ICI
Pre-amplifier (Record/ AG
playback)
Dolby B-type Noise Reduc-
AM
tion Circuit
APSS Circuit
AK
Peak Level Display Meter
AL
Driver (I
Hall Element
AK
0102,202
0103,203
0104,204
0301,302
Switching, Dolby
Record Equalization
Amplifier
Muting
Audio Amplifier (Head-
phones)
Bias Oscillation
AC
APSS Circuit
AC
APSS Solenoid Driver AE
0103.203
0104,204
TRANSISTORS (RT-31)
Switching, Dolby AB
Record Equalization
fier
Muting
Audio Amplifier (Head-
phones)
Q701
Q702
Bias Oscillation
APSS Circuit
APSS Solenoid Driver
AC
AC
AE
ZENER DIODE
DIODES AND LEDS (RT-31H/HB)
01,201
D301
D603
Muting
LED, Record Indicator
Surge Absorver
OE
Power Rectifier
AC
AC
LED, Peak Level Indicator
AK
“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
As to Transistors, Diodes, Zener Diode and LED described in this parts list, they are different according to the Model RT-
31
or RT-31,
A distinction is drawn between the
items by description of the used units parenthesized.
NOTES: 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.
REF. NO.
PART NO.
DESCRIPTION
CODE
D607
D610
D614
D701
LED, Peak Level Indicator
LED, Peak Level indicator
LED, Peak Level indicator
LT-3001
3702
D703
Reverse Current Prevention
LED, APSS Indicator
AC
Reverse Current Prevention
DIODES AND
(RT-31)
3401
1
Muting
LED, Record Indicator AC
Surge Absorver
AB
3603
Power Rectifier
AC
LED, Peak Level Indicator
I
I
I
I
I
I
I
I
I
3701
LT-3001
LED, Peak Level Indicator
LT-3001
LED, Peak Level Indicator
AK
LED, Peak Level Indicator
3702
3703
1
1
Reverse Current Prevention
LED, APSS Indicator
Reverse Current Prevention
AC
Reverse Current Prevention
ZENER DIODE (RT-31)
Reverse Current Prevention
AB
201
Record Equalizer
AC
Bias Step-up AD
Bias Oscillation
Noise Killer (100,~H) AC
Page 19
For VHI LA3160//-1 (ICI
see Figure 7-2
7.
(IC2,
I
DOLBY B-TYPE
‘OWE
CIRCUIT
TOP VIEW
N/C
OUTPUT
REFERENCE
OUTPUT
IN PUT
INPUT
Figure
BLOCK DIAGRAM
(IC4)
FRONT VIEW
Figure
BLOCK DIAGRAM
TOP VIEW
Figure
BLOCK DIAGRAM
FRONT VIEW
Figure
EQUIVALENT CIRCUIT
Page 20
1
2
3 4 5 6
1
2
3 4 5 6
Figure 19 CABINET EXPLODED VIEW (Use of
A
Page 21
PARTS LIST
REF. NO.
AT501
,201
202
201
Cl 04,204
Cl
Cl 09,209
210
c112.212
Cl 23,223
Cl 25
Cl 26,225
C226
C127.227
Cl 28,228
Cl 36,236
Cl 40
Cl42
PART NO.
DESCRIPTION
TRANSFORMER
CAPACITORS
Power (RT-31
Power
AU
HE821
82OPF,
Ceramic AA
AA
Ceramic
Mylar AB
L271
Ceramic AA
AB
Semiconductor
Mylar
MFD,
AA
Ceramic
AB
VCQY
5OV,
Mylar A0
AB
AA
Semiconductor
Mylar AB
AA
Semiconductor
AA
Semiconductor
5OV,
AA
Ceramic
L471
Ceramic AA
AB
Polypropylene
VCQY
Mylar AB
Mylar AB
A0
Mylar AB
AB
5OV,
-20%. AA
Ceramic (RT-31
AA
Semiconductor
Semiconductor
5OV, +80
AA
Ceramic
FILTERS
Dolby,
Pass Filter)
and
Trap
CONTROLS
50K
Playback
Sensitivity Adjust
Record Level
Control
Record
Sensitivity Adjust
Bias Current
Adjust
50K
Peak Level
Display Meter Sensitivity
Adjust
A
HW224M
IOMFD,
HW334K
1 OMFD,
5OV. 120%
HW154M
1 MFD, 5OV.
5OV.
IOMFD,
1 OMFD,
V
5OV.
1 MFD, 5OV.
IOMFD,
47M
AG
AB
AK
AB
AB
AB
AB
AC
AB
AB
AC
AF
AB
AB
AC
AB
AB
AB
AC
AB
AB
A0
A0
REF. NO.
Cl 16,216
Cl 20,220
Cl 22,222
Cl 24,224
Cl 29,229
Cl 30,230
Cl 32,232
Cl 34,234
Cl38
505
PART NO.
DESCRIPTION
CODE
RESISTORS
(Unless otherwise specified resistors are
Carbon Type)
209
33K ohm
100 ohm
ohm
ohm
ohm
ohm
ohm
68 ohm
ohm
ohm
ohm
270K ohm
ohm
AA
Page 22
PARTS LIST
REF. NO. PART NO.
DESCRIPTION CODE
213
214
215
Knob, Power Switch
AE
Knob, Power Switch
AD
Knob, Tape Selector Switch/ AN
Dolby
Selector Switch
Knob, Tape Selector Switch/ AM
Dolby
Selector Switch (RT-31 HB)
JKNBN0491 AFSA
Knob, Record Level Control AE
AFSB
Knob, Record Level Control
HB)
216216
Tape Counter
Tape Counter
AKAK
: :Bushing, AC Supp,ply’Cd;.d:
: :Bushing, AC Supp,ply’Cd;.d:
AC
AC
‘Bushing, AC
‘Bushing, AC
‘,
Chassis
Chassis
Main Chassis (RT-31) AM
Main Chassis (RT-31) AM
Front Panel ChassisFront Panel Chassis
ATAT
219
220
221
222
223
224
225
226
227
22%
229
230
231
232
233
234
235
A236
237
23%
239
Front Panel Chassis
AT
Peak Level Display Meter AE
Chassis
Wire Holder
AA
Record Indicator/ AC
APSS Indicator
LH
Holder,
Peak
Level Display AC
Meter
Damper
AD
Rod, Record/Playback
AC
Selector Switch
Spring, Cassette Holder
AB
Spring (Plate type), Cassette AA
Pressure
Belt, Tape Counter
AB
PF LT-OSBSAFZZ
Felt, Rear
AA
PF LT-0440AFOO
Felt, Front Reg
AA
Heat Sink
AD
Sheet, Cassette Holder Cover AB
Shield Plate, Record Level AC
Control
PSPAN0051 AFZZ
Spacer, Head Sink AA
Spacer, Power Switch Knob
Spacer, Power Switch Knob
AL
AGZZ AC
Cord
AL
Supply Cord
AC
Cord
AK
AC
Cord
Supply Cord
AG
Lug Terminal,
AA
Lug Terminal,
AA
57AFFN Terminal, Ground
AB
Specification Sheet (RT-31
AC
Specification Sheet
AC
Sheet
AB
PF
Felt, Cabinet AA
Spacer, Voltage Selector
AA
Socket (RT-31
241
242
243
REF. NO. PART NO.
DESCRIPTION
CODE
.:‘”
;;rr*,
245
LANG F041
Spacer, Transformer AA
Reinforcement (RT-31
246
Spacer, Front Panel Chassis
247
Rubber, Cabinet
24%
Shield Plate, Power Trans-
former IRT-31
249 LX-WZBOI 7CEFN Stop Washer
250
Screw, Power Switch
Retaining
Connecting Plug (B-Pin)
AB
Connecting Plug (Z-Pin)
AA
Connecting Plug (8-Pin)
AC
CNP4
Connecting Plug (Z-Pin) AB
Connecting Socket (6-Pin) AK
Connecting Socket (Z-Pin) AE
Connecting Socket (Z-Pin)
Connecting Cord, RCA-Pin AH
QCNW-0727AFZZ
Connecting Cord, DIN Type, AP
75cm (RT-31
Connecting Cord, DIN Type,
150cm
for UK)
5 Lead of Jumper
AD
QCNW-1
3 Lead of Jumper
AC
QCNW-11
2 Lead of Jumper
AB
Jack, Headphones AE
Jack, Microphone Left
AE
Jack, Microphone Right
Fuse,
AE
Fuse Holder
AA
2.
so5
.
SW1
SW2 IA,
SW3 (A, B)
SW4
B)
(A-D)
SW8
Sockets,
2 Line Input
Line Output
Socket, DIN (5-Pin) AE
Record/Playback
Voltage Selector
HMB)
Switch, Record/Playback AH
Selector
Switches,
Input Selector
SW3; Dolby NR
SW4; Tape Selector
AP
(Normal)
SW5; Tape Selector (CrOz
Tape Selector (Metal)
SW7; Tape Selector
Switch, Power (RT-31
Switch, Power
AF
Switch, Muting
AE
Switch, APSS
AD
Switch, Bias
AD
Solenoid, APSS
AM
Solenoid, APSS
AK
AC Adaptor
AF
QPLGA0251 AFZZ AC Adaptor
Cushion, Packing Case, Left
Cushion, Packing Case, Right
Packing Case
AH
Packing Case (RT-31 HB)
AH
Page 23
PARTS LIST
REF. NO.
PART NO.
DESCRIPTION CODE REF. NO.
PART NO.
DESCRIPTION
CODE
017
018
019
020
021
LX-HZ0081
022
023
024 LX-WZ501
025
026
028
029
030
031
032
033
034
035
036
037
038
MLEVP0221 AFZZ
039
040
041
042
043
044
045
046
047
048
AFZZ
049
050
051
052
053
054
055
056
057
058
059
060
061 MSPRD031
062
063
064
065
067
068
069
070
071
072
073
074
Spring, Record Prevention
Lever
Spring, Auto Stop Killer
075
AFFJ
Spring, Brake Lever/Lock
Release Lever
Spring, P.A.D. Lock Lever
Spring, Cassette Lock Lever/
Play Release Lever
Spring, Pause Lever
Spring, Play Lever
Spring, Sub Chassis
Steel Ball 2mm Dia
Flywheel Drive
Belt, Play
Turntable, Take-up
Turntable, Supply
Flywheel Assembly
Gear, P.A.D.
Gear, Play
Gear, Play Drive
Idler, Play
Idler, Rewind
Pulley
Fast-forward Roller Assembly
Rewind Roller Assembly
Pressure Roller Assembly
Shaft, Pulley
Shaft, Record Conversion
Lever
Cushion, P.A.D. Lever
Erase Head
Record/Playback Head
Motor DC
Earth Terminal with Lead
AB
AA
Screw, 3mm Dia
Screw,
Dia
Screw,
Dia
Screw, 3mm Dia
Screw, 3mm Dia
Screw, Record/Playback
Selector Switch Interlocking
Lever Retaining
Lock Washer,
Dia
Washer, 2.1 mm Dia
Washer, I .7mm Dia
Washer, Oil Cut
Washer, 1.5mm Dia
Washer, 2mm Dia
Cam, Pause
Lever, P.A.D.
AD
Lever, Record/Playback AC
Selector Switch
Lever, Cassette Lock
Lever, Record
Lever, Play
076
077
AB
AB
078
079
080
081
082
083
084
085
086 NFLYCOOQOAFZZ
087
088
089 NGERP0051 AFZZ
090
091
092 NPLY ROO76AFZZ
093
094
095
096
097
NSFTTOI
AB
AB
AB
AA
AC
AG
AE
AP
AE
AD
AB
AF
AF
AD
Lever, Rewind
Lever, Fast-forward
Lever, Pause
Lever, P.A.D. Lock
Lever, Auxiliary P.A.D. Lock
Lever, Start
Lever, Eject Prevention
Lever, Record Prevention
Lever, Lock Release
Lever, Brake Release
Lever, APSS Switch
Lever, Fast-forward/Rewind
Prevention
Lever, Record Sensor
Lever, Sub Chassis Lock
Lever, Play Release
Lever, Brake
Lever, Auto Stop Killer
Lever, Sensor
Lever, Erase Prevention
Lever, Record Interlocking
Lever, Thrust
Lever, Damper
AB
AC
A0
AD
AC
AC
098
099
100
101
102
AB
AL
AR
AV
AC
MISCELLANEOUS
201
‘.
202
Cover, Peak Level
AH
203
204
Meter (Transparent)
GCOVAI 249AFSA Cover, Cassette Holder AG
Scale, Peak Level Display AH
Meter
157AFSA Cassette Holder
AH
GFTACI
Cassette Holder
HB) AH
Bottom Plate
AF
Decoration Plate, Cassette AG
Holder Cover
Decoration Plate, Cassette AG
Holder Cover lRT-31 HB)
Decoration Plate, Peak Level AD
Display Meter
Decoration, Plate, Peak Level AD
Display Meter
HB)
Mirror, Cassette Compart- AC
ment
Mirror, Cassette Compart- AC
ment
205
Spring, Pause Lever Pin
Spring, Head Azimuth
Spring, APSS Solenoid
Spring, Sensor Lever
Spring, Over Stroke
Spring, P.A.D. Lock Lever
Spring, Pinch Roller
Spring, Record Sensor Lever
Spring, Fast-forward/Rewind
Release
Spring, Pinch Roller Return
Spring, Pause Cam
Spring, Sub Chassis Lock
Lever
Spring, P.A.D. Gear
Spring, Dumper Lever
Spring (Plate type), Sub
Chassis Retaining
Spring, (Plate type), Cassette
Press
207
208
209
Scale Plate, Cassette Compart- AD
ment
Scale Plate, Cassette
AC
ment lRT-31 HB)
Front Panel (RT-31 H)
AX
HPN
Front Panel (RT-31 HB)
AY
Front Panel
Knob, Record Level Control AF
(Right)
Knob, Record Level Control AF
210
21
212
-24-
Page 24
PARTS LIST
REF. NO. PART NO.
RI 19,219
,221
23,223
RI 25,225
R127.227
234
RI 38,238
R301
ROJ
R505
603
610
ROJ
DESCRIPTION
47K ohm
ohm
12K ohm
560K ohm
ohm
22K ohm
ohm
47 ohm
ohm
ohm
ohm
ohm (R-i-31
15K ohm (RT-31
ohm
ohm
82K ohm
ohm
ohm
82 ohm
560 ohm
33K ohm
ohm
22K ohm
ohm
68 ohm
Oxide
Film (RT-31
68 ohm
ohm
56K ohm
ohm
ohm
100 ohm
68 ohm,
Fusible
68 ohm,
Carbon
82 ohm (RT-31
22K ohm
ohm
10 ohm
82 ohm
68 ohm (RT-31
ohm
12 ohm,
Fusible
680 ohm
ohm
1 ohm,
Fusible
15K ohm
18K ohm
ohm
22 ohm, 1/4W.
Fusible
22 ohm
ohm
15K ohm
CODE
AA
AB
AA
AB
AA
AB
AA
AA
AA
AB
AA
AA
AA
AA
AB
AA
AA
AA
AA
-23-
:
REF. NO.
613
R709
001
PART NO.
DESCRIPTION CODE
ohm
ohm
ohm
180 ohm
ohm
27K ohm
120 ohm
ohm
22K ohm
ohm
22K ohm
820 ohm
MECHANICAL PARTS
Mechanism Control Button
Assembly
Mechanism Control Button
AA
AK
Assembly CRT-31HB)
SOAFSA
Button, Cassette Eject
002
KNBPOI 50AFSB
Button, Cassette Eject
Button, Record
AFSB
Button, Record
HB)
Button, Stop
Button, Stop (RT-31 HB)
Button, Play/Fast-forward/
Rewind/Pause
53AFSB Button, Play/Fast-forward/
Rewind/Pause
HB)
Button Block Assembly
Bracket, Control Button
AR
AFZZ
0
1
2
3
4
5
6
003
004
005
LANG
006
007
AFZZ
008
009
LCHSSO159AFZ.Z
010
011
012
AFZZ
013
014
4AFFW
015
LSTWC2001 AFZZ
016
Arm, APSS Prevention
Lever, APSS Prevention
Lever, Main Lock
Lever, Sub Lock
Lever, Pause Button
Lever, Fast-forward/Forward
APSS Button
Lever, Rewind/Reverse
APSS Button
Lever, Stop Button
Lever, Play Button
Lever, Record Button
Lever, Cassette Eject Button
Spring, APSS Prevention
Spring (Plate type), Control
Button Lever
Pin, APSS Prevention Arm
Shaft, Control Button Lever
Bracket, Flywheel
Bracket, Sub Chassis Guide
Bracket, Motor
Bracket, Head Base
Second Chassis
Mechanism Main Chassis
Sub Chassis
Wire Holder
Wire Holder
Pin, Pause Lever
Spacer, Sensor Lever
Spacer, Mechanism
Board
Stop Ring, 2mm’ Dia
Stop Ring,
Dia
AD
AE
AC
AC
AA
AA
AA
AC
AB
AA
AA
Page 25
PARTS LIST
REF. NO.
PART NO.
DESCRIPTION
CODE
REF. NO.
PART NO.
DESCRIPTION CODE
Packing Case
Wrapping Paper, Connecting AD
Cord
Polyethylene Bag, Operation AA
Manual
Polyethylene Bag, Unit AB
Operation Manual AK
Operation Manual (R-T-31)
Connection
AC supply cord
Bushing
Figure
Projection
stripe
Brand stamp
Brown
Brown
Black Black
Black Black
Brown
Blue
AGZZ LBSHC0004AGZZ
Brown
Light blue
P.W.B. ASSEMBLY (Not replacement item)
Main Circuit/Power Switch
(Combined Assembly) Circuit/Peak Level Indi-
cator Circuit
Main Circuit/Power Switch
(Combined Assembly) Circuit/Peak Level Indi-
cator Circuit
Figure 26 AC SUPPLY CORD WIRING CONNECTIONS
SHARP CORPORATION
SHARP ELECTRONICS CORPORATION
Executive
10 Keystone Place,
Paramus,
New Jersey 07652 (201)
Distribution Centers,
2 Keystone Place,
Paramus,
New Jersey 07652 (201) 265-5600
20600
Alameda St.
Carson,
90810 (213) 637-9488
430
Plainfield Rd. Countryside, Illinois
60525
482-9292
U.S.
of Sharp Corporation, Osaka, Japan
Parts Centers:
P.O. Box 664
Paramus,
New Jersey 07652 (201) 265-5600
P.O. Box 20394
Long Beach,
9080 1
(2
Box 10
La Grange,
Illinois
60525 (312) 482-9292
Printed in
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