Pioneer CT-70R User manual

VY) PIONEER’
Setvice
PAZETTET
REPAIR & ADJUSTMENTS
ORDER NO.
ARP- 260-0
STEREO CASSETTE TAPE DECK
Cir- 7OR
MODEL CT-70R COMES IN SEVEN VERSIONS DISTINGUISHED AS FOLLOWS:
~T Whom; . |
Type Voltage Remarks
KU AC120V only U.S.A. model
__|
KC AC120V only Canada model
+
HE AC220V, 240V (switchable) European continent model
HB AC220V, 240V (switchable) United Kingdom model
AC220V, 240V (switchable) Australia model
AC120V, 220V, 240V (switchable) General export model
AC120V, 220V, 240V (switchable) U.S. Military model
This service manual is applicable to the KU type. For servicing of the other types, please refer to pp.
66~76.
For the circuit and mechanism descriptions, please refer to the CT-90R service manual (ARP-364-0).
Ce manuel d’instruction se refére au mode de reglage, en francais.
Este manual de servicio trata del método de ajuste escrito en espajiol.
CONTENTS
1. SPECIFICATIONS ......0.0. 050055 085 ea% 3 9. ELECTRICAL PARTS LIST .............. 33
2. FRONT PANEL FACILITIES ............. 4 10. ADJUSTMENTS .......... 0.0.0. cee eee 38
3. DISASSEMBLY ............. 00.0 00000- 8 REGU AGE soc skeek eae ok seek Cav awe 47
4. PARTS LOCATION ................004. 10 ASUSTEES 2.3 Gace a Periebdetesabs achudee o alierccd SBE S 56
5S, ‘EXPLODED VIEW: s 2 pg gees gee gine ams 12 11. SUPPLEMENT FOR HE, HBANDHPTYPES .. 66
6: PACKING «5 esea dead cedaarevss dee ews 18 12. SUPPLEMENT FOR KC TYPE ............ 71
7. P.C. BOARDS CONNECTION DIAGRAM ..... 20 13. SUPPLEMENT FOR D AND D/G TYPES .... 72
8. SCHEMATIC DIAGRAM ................ 27
PIONEER ELECTRONIC CORPORATION 3-1, Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan
PIONEER ELECTRONICS (USA) INC. 1925 E. Dominquez St., Long Beach, California 90810 U.S.A.
PIONEER ELECTRONIC [EUROPE] N.V. Keetbergiaan 1,2740 Beveren, Belgium
PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia
YH © MAY 1983 Printed in Japan
an

CT-70OR
SAFETY
INFORMATION
1. SAFETY PRECAUTIONS
The following check should be performed for the
continued
protection
of
the
customer
and
service
tech-
nician.
LEAKAGE CURRENT CHECK
Measure
leakage
current
to
a
known
earth
ground
(water
pipe,
conduit,
etc.)
by
connecting
a
leakage
current
tester
such
as
Simpson
Model
229-2
or
equivalent
between
the
earth
ground
and
all
exposed
metal
parts
of
the
appli-
ance
(input/output
terminals,
screwheads,
metal
overlays,
control
shaft,
etc.).
Plug
the
AC
line
cord
of
the
appliance
directly
into
a
120V
AC
60Hz
outlet
and
turn
the
AC
power
switch
on.
Any
current
measured
must
not
exceed
0.5mA.
Leakage
current
tester
Reading should
not be above
0.5mA
Test all
exposed metal
surfaces
2-wire cord
@ Also test with }
plug reversed 1 Earth
(Using AC adapter "ground
plug as required)
AC Leakage Test
ANY MEASUREMENTS NOT WITHIN THE LIMITS
OUTLINED ABOVE ARE INDICATIVE OF A PO-
TENTIAL SHOCK HAZARD AND MUST BE COR-
RECTED BEFORE RETURNING THE APPLIANCE
TO THE CUSTOMER.
2. PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in the appliance
have special safety related characteristics. These are often
not evident from visual inspection nor the protection
afforded by them necessarily can be obtained by using
replacement components rated for voltage, wattage, etc.
Replacement parts which have these special safety charac-
teristics are identified in this Service Manual.
Electrical components having such features are identified
by marking with a A\ on the schematics and on the parts
list in this Service Manual.
The use of a substitute replacement component which
dose not have the same safety characteristics as the
PIONEER recommended replacement one, shown in the
parts list in this Service Manual, may create shock, fire,
or other hazards.
Product Safety is continuously under review and new
instructions are issued from time to time. For the latest
information, always consult the current PIONEER Service
Manual. A subscription to, or additional copies of, PIONEER
Service
Manual
may
be
obtained
at
a
nominal
charge
from
PIONEER.

1. SPECIFICATIONS
SYSTEM: iccidatie netted hateeedters Compact cassette, 2-channel stereo
HeadSicccodscngeevceduedeaecnces “Ribbon Sendust”’ recording/ playback
head x1
erasing head x 2
Mtor iisisecsestendvltaven bibeatasbestecondeesnnds DC servo capstan motor x 1
DC ree! motor x 2
Wow/ Flutter .........:ccecceeeceeceeeeeeeens No more than 0.03% (WRMS)
No more than + 0.16% (DIN)
Fast Winding Time ................00.08 Approx. 90 seconds (C-60 tape)
Frequency Response
— 20 dB recording:
Normal ta00 visisccsiscecssscescsedseeverscssgatweesevaensve 25 to 17,000 Hz
(30 to 16,000 Hz + 3 dB)
CHROME tape nice see ctictdinaionesevs ideas a euenee deeb oe 25 to 17,000 Hz
(30 to 17,000 Hz + 3 dB)
Metal tape: .ecccscccictiisevetedesciaceccssdeisiarsevecmacave 25 to 19,000 Hz
(30 to 18,000 Hz + 3 dB)
0 dB recording:
NOFMal tape sepsis sowed sonveeasdte pes eseneensbdsvees ebend tea er 25 to 9,000 Hz
Chrome tape ...........ccceccecccusesccceseeveneecaeeeueueees 25 to 9,000 Hz
Metal tape ...........ccccceccsceescucececcveueeseeesaeueuees 25 to 14,000 Hz
Signal-to-Noise Ratio
Dolby NR OFF 00.0... cccecceceececsecceesecvesaeeeeueues More than 58 dB
Noise Reduction Effect
Dolby type B NR ON .................:ee eee More than 10 dB (at 5 kHz)
Dolby type CNRON ........ eee More than 19 dB (at 5 kHz)
Harmonic Distortion (Metal tape) No more than 1.0 % (0 dB)
Input (Sensitivity)
MIC (L,R) 2... ee ee ee 0.25 mV, 6 mm diam. jack
(Source impedance 600 2}
LINE (INPUT) .. 0... ..20.... 0.200000 0008 70 mV
(Input impedance 50 k& or more)
Output (Reference level)
LINEMOUT PUR) ice ee ree iat hee EE AG vee ds 450 mV
(Output impedance 10 k& or less)
Headphones... 2... es 0.3 mW
(Load impedance 82)
SUBFUNCTIONS
© Recording playback auto reverse (Quick reverse)
¢ Dolby NR system (type B and C)
Music search function
Skip function
Index scan
Blank search
Music repeat
Auto tape selector function
4-digit tape counter
12 Segment level meter (LED)
Wired remote control
Timer standby function
REC muting function
MISCELLANEOUS
Power Requirements
KU KG models enced teeta cto ssa chag een ae eke AC 120 V, 60 Hz
HE, H& and HP models ......... AC 220/240 V, 50/60 Hz (switchable)
D, D/G models ............... AC 120/220/240V, 50/60 Hz (switchable)
Power Consumption
KAD, BG IMOGEIS se eaha ls evel ig leadun suas veceks cociwiaiwe telat: 51 watts
HE, HB and HP models ... 5Owatts
De D/G Models) ficccse es o0- asc ve caeccna eee oas alate areeeuabe ccna 40 watts
Dimensions... s256.255 cesesnevieasahs sanseeee 420 (W) x 120 (H) x 355 (D) mm
16-9/ 16 (W) x 4-12/16 (H) x 14(D) in
Weight (without packaging) ............cccccseseeneeeee ee 6.6 kg (14 Ib 9 oz)
FURNISHED PARTS
Operating instructions ............cccecccceeseeeeea seca eeeeneeeenseneeneeanees 1
Connection cord assembly ............cceccceceecucecevencessaceeeeeneeerenees 2
NOTES:
1. Reference Tapes:
Normal & LH: DIN 44513/BLATTE or equiv.
CrO, DIN 45513/BLATT7 (CrO,) or equiv.
2. Reference Recording Level: Meter 0 dB indicating level (160
nwb/m magnetic level = Philips cassette reference level)
3. Reference Signal: 315 Hz
4. Wow & Flutter: © JIS (3 kHz, with acoustic compensation
(weighted) rms value); DIN 3,150Hz with acoustic compensation
tion (weighted) PEAK value DIN 45507
5. Frequency Response: * Measured at — 20 dB level, DOLBY NR
OFF, level deviation is + € dB without indication.
6. Signal-to-Noise Ratio: ¢ Measured at 3rd harmonic distortion 3%
level, weighted (DIN 45513/BLATT7)
7. Sensitivity: Input level (mV) required for reference recording tevel
with input (REC) fevel control set to maximum
8. Reference Output Level: Playback output level when meter in-
dicates 0 dB.
9. This model does not employ a recording/playback connector
(DIN-type).
NOTE:
Specifications and the design are subject to possible modifications
without notice due to improvements.

2. FRONT PANEL FACILITIES
“@ AUTO REVERSE >
2 PRONMEER ertmes Camm TTE ane DaCx
@ POWER SWITCH (POWER)
The power is switched on when this switch is pressed. Release the
switch to turn off the power.
e After the switch is set to the ON position, the muting circuit is
activated and so the unit will not operate for about 4 seconds.
e When the POWER switch is set to OFF while the tape deck is
operating, the operational mode is released and the unit is set to
the stop mode.
e When the POWER switch is set to ON while the TIMER switch is
at the REC or PLAY position, the recording or playback mode is
established automatically. Make sure that the TIMER switch is at
OFF when an unattended recording or wake-up playback opera-
tion is not to be performed.
e When the POWER switch is set to ON, the head section func-
tions momentarily. This is normal and not an indication of a
malfunction.
@
TIMER
START
SWITCH
(TIMER)
This switch is used when an optional audio timer is employed for
unattended recording or wake-up playback operations. Keep this
switch at the OFF position when the timer is not being used.
REC: Set to this position to set the tape deck automatically to
the recording mode at the time preset on the audio
timer and to start the recording of programs unattend-
ed, for instance.
OFF: For when the timer is not being used.
PLAY: Set to this position to set the tape deck automatically to
the playback mode at the time preset on the audio timer
and to start the playback. The tape playback function
can be used to wake-up in the morning instead of an
alarm clock.
© EJECT BUTTON (EJECT)
The cassette door opens when this button is pressed. When it is
pressed while the tape is traveling or during a recording or playback
standby operation, noise will be generated and possible malfunc-
tioning may occur. Even if pressed, the cassette door will not open.
© CASSETTE DOOR
@
DIRECTION
SWITCH
(DIRECTION)
Press this switch to select the direction in which the tape is to travel.
When the tape is moving forward and the switch is pressed, the
tape direction is reversed; when the tape is moving in the reverse
direction, it starts moving forward. The direction indicator lights up
to show the direction of the tape movement. Since the tape’s direc-
tion can be reversed with a push of this switch, there is no need to
turn over the tape and re-load it.
When this switch is pressed even in the playback or recording
standby mode, the tape’s direction is reversed.
@ DIRECTION INDICATORS
These indicate the direction of the tape transport.
@ TAPE COUNTER
The numbers change as the tape is playing. Tape position is in-
dicated with a four-column digital counter.
@ RESET BUTTON (RESET)
Depressing this button resets the tape counter to “‘0000’’. Depress
this button before recording or playback to reset the counter to
0000". If you make a memo of the tape contents and correspon-
ding tape counter numbers during recording and playback, you will
have an index of the programs on the tape enabling you to conve-
niently find any desired program on the tape.

@ MEMORY SWITCH
Memory stop operations can be performed when this switch is
pressed to the ON position. The tape counter is set to ’’0000’’
beforehand and the tape is rewound. As soon as the tape is re-
wound to the ‘‘0000"' position, it stops automatically. Use this func-
tion to rewind a recorded program and play it back immediately or to
repeatedly listen to the same program. Normally, this switch is kept
at the released OFF position. The memory stop function also
operates in the fast forward mode.
@ PLAY SWITCH (PLAY)
Depress this switch to playback a tape.
@ PLAY INDICATOR (m)
@ REW SWITCH (<x)
Depress this switch to rewind the tape at high speed (The tape will
travel from right to left).
@® FF SWITCH (co)
Depress this switch to send the tape forward at high speed (The
tape will travel from left to right).
@ STOP SWITCH (sTopP)
Depress this switch to stop the tape travel and to release the
Operating switches.
@ DOLBY INDICATORS (DOLBY NR)
These light when the DOLBY NR switch is set to ON ( = ).
[B}: This lights when the B type Dolby noise reduction system is
operating.
IC]: This lights when the C type Dolby noise reduction system is
operating.
@ PAUSE SWITCH (PAUSE)
Press to temporarily stop the tape transport in the playback or recor-
ding mode. At times like this, the pause indicator (#—) lights. When
pressed again, the pause function is released and the tape starts to
travel again. The switch does not function in the fast forward or re-
wind modes. When it is pressed in the stop mode, the pause in-
dicator lights; when it is pressed again, the unit is reset to the stop
mode and the tape does not move.
@ PAUSE INDICATOR (18)
This lights when the unit is set to the pause mode.
@ RECORDING SWITCH (REC)
This switch is depressed to record a tape. The recording indicator
(©) will light. The switch cannot be placed in the ON position if the
accidental erasure prevention tabs on the cassette have been broken
off, or if no cassette is in the unit.
@ RECORDING INDICATOR (e@)
This lights when the unit is set to the recording mode.
@ RECORDING MUTE SWITCH
(REC MUTE)
When this switch is pressed during recording, unrecorded blanks
can be created for as long as the switch is kept depressed. While
depressed, the MUTE indicator (MM ) lights. Use this switch for effi-
cient editing of tapes with sufficient blanks between the programs
and for providing the unrecorded blanks which are required to
operate the index scan, music search/skip, music repeat and blank
search accessory functions.
This switch does not lock and so functions only while it is kept in
the depressed position. When pressed during a recording, no
sound is recorded and so the switch should not be pressed
unless absolutely necessary.
@ RECORDING MUTE INDICATOR (@)
This lights while the REC MUTE switch is pressed during a recor-
ding.
@ RECORDING LEVEL CONTROLS (INPUT)
These controls adjust the input from the rear panel INPUT terminals
or from the MIC jack. When slid toward the right, the recording level
is increased; when slid toward the left, it is reduced. The top control
is for the left (L) channel and the bottom control for the right (R}
channel.
@ HEADPHONE JACK (PHONES)
This is the output jack for the stereo headphones. Plug the head-
phones into this jack to monitor the quality of a recording or to listen
to a tape privately.
NOTE:
¢ Use headphones with a low impedance. Sufficient volume will
not be obtained with high-impedance headphones.
@ MIC JACKS
These are the input jacks for microphone recording. Plug the left
channel microphone into the L jack and the right channel
microphone into the R jack.
@ LEVEL METER
This indicates the recording level during recording and the output
level during playback. The top part is for the left (L) channel and the
bottom part for the right (R) channel. The meter has a high response
speed and it indicates the ever-changing peak values faithfully so
that level adjustment can be performed accurately.
@ INDEX SCAN SWITCH (INDEX SCAN)
Press this switch to listen to the beginnings of programs on a tape
such as a music tape and to find the program which you want to
listen to. When the switch is pressed, the tape is fast forwarded or
rewound in the direction selected by the DIRECTION switch and the
start of the program is searched. When the start of one program is
played back for about 7 seconds, the tape is again fast forwarded or
rewound.
The
following
mode
change
is
repeated:
fast
forward
(rewind)
~
play
(approx.
7
seconds)
~
fast
forward
(rewind)
~
play
(approx.
7
seconds).
Press
the
PLAY
switch
when
the
desired
program
has
been
located.
/f the tape direction is selected by the FF or REW switch during
index scanning, the scanning operation will function in that
direction too.

@ MUSIC SEARCH/SKIP SWITCH
(MS/SKIP)
Push this switch and the FF switch (C{>) or REW switch (<k)).
The unit is automatically set to the playback mode when it locates
an unrecorded blank between the programs over 4 seconds long
while the tape is being fast forwarded or rewound. This function is
known as ‘music search.”
When the unrecorded blank continues for more than 8 seconds in
the playback mode, the tape is fast forwarded or rewound in the
direction selected by the DIRECTION switch. When the next pro-
gram is detected, the unit is again set to the playback mode. This
function is convenient for listening efficiently to tapes with long
unrecorded blanks between programs, and it is known as the “skip
function.”
When the MS/SKIP switch is pressed, the @ indicator lights. To
release these functions, press the switch again.
@ MUSIC SEARCH/SKIP INDICATOR (ON)
@ MUSIC REPEAT SWITCH
(MUSIC REPEAT)
When this switch is pressed during tape playback, the @ indicator
lights and the desired program can be played back repeatedly up to
8 times.
@ MUSIC REPEAT INDICATOR (ON)
@ BLANK SEARCH SWITCH
(BLANK SEARCH)
When this switch is pressed, the unit is set to the fast forward
mode. When an unrecorded blank of more than 8 seconds is
detected in this mode, the tape is rewound and an unrecorded blank
of 4 seconds is automatically set.
@ *DOLBY NR SWITCH
(DOLBY NR ON/OFF)
Press this switch to the ON ( -m ) position when recording material
with the Dolby noise reduction system or when playing back a tape
which has been recorded with the system. Release the switch to the
OFF ( 8) position when recording material without the Dolby
system or when playing back a tape which has not been recorded
with the system.
° /f you make a note on the tapes of material recorded with the
Dolby system, there will be less chance that the DOLBY NR
switch will be set to the wrong position during playback.
© When a recording has been made with the system, ensure
that it is played back with the system. Proper sound will not
be reproduced if a tape recorded with the Dolby system is
played back with the switch at the OFF position or if a tape
recorded with the switch at the OFF position is played back
with the Dolby system.
“The word “Dolby” and [JQ are trademarks of Dolby Laboratories
Licensing Corporation.
Noise Reduction System manufactured under license from Dolby
Laboratories Licensing Corporation.

@ DOLBY B/C SELECTOR SWITCH
(DOLBY NR B/C)
This deck comes with both type B and type C Dolby noise reduction
systems. After the DOLBY NR ON/OFF switch has been pressed,
select type B or C using this switch. When pressed in ( -_), type C
is seiected; when released { MM ), type B is selected. The Dolby in-
dicator corresponding to the switch position lights.
@ TAPE INDICATORS
~ (NORM/Cr0O,/METAL)
This mechanism uses the sensor holes on the cassette to detect the
type of tape being used. It then automatically adjusts the proper
recording bias and equalization for the tape. The type of tape is then
shown on the tape indicator. Refer to page 9 for the different types
of cassette tapes and their hole positions.
NORM: _ This indicator lights when normai tapes are used.
Ccro,: This indicator lights when CrO, tapes are used.
METAL: _ This indicator lights when metal tapes are used.
NOTE:
When using metal tapes without sensor holes, the tape selector
will be set on the CrO, position. In this case, optimum recording
and erasure may not be possible. We thus recommend that you
use metal tapes with sensor holes. Pre-recorded metal tapes can
be played as is on this unit.
€ MODE SWITCH (MODE)
This selects the tape transport mode during playback or recording.
== =: One-way playback (one-way recording)
When the tape is wound up onto one of the reels, the
autostop mechanism is activated and the tape is
automatically stopped. Set the switch to this position for
playing back (recording) one side of a tape.
==> : Auto reverse (both-ways playback, both-ways recording)
When the tape finishes running in the forward direction and
is fully wound up, its running direction is automatically
reversed. When the tape comes to the end in the reverse
direction, the auto-stop mechanism is activated and the
tape is stopped automatically. When a start has been made
from reverse playback (recording), the tape stops
automatically at the end.
ome) : Auto repeat
This function allows both sides A and B to be repeatedly
played back four times each (8 times together). Side A is
played back first, this is followed by side B and then side A
is played back again, etc. When the tape comes to the end,
the auto-stop mechanism is activated and the tape is stop-
ped automatically.
@ When the PAUSE switch is pushed during playback to
set the unit to the pause mode and then the same
switch is released to resume playback, sides A and B of
a tape can be played back four times each (8 times
together) anew.
e In the recording mode the tape runs through both sides
and then stops whether the MODE switch is at the C_D
or “a> position.
NOTE:
The auto-stop mechanism (leader tape sensing mechanism) may
malfunction in the following cases:
e When a strong beam of light has been shone near the heads.
CT- 7OR
°* The tape direction is automatically reversed at the tape end
even if there is a malfunction because of the leader tape sens-
ing. (The tape stops at the == MODE switch position but
reverses at the => or CZ position.
@ MULTIPLEX FILTER SWITCH
(MPX FILTER)
Push this switch when recording FM stereo broadcasts or TV pro-
grams using the Dolby noise reduction system.
Contained among the FM stereo signals are a 19 kHz pilot signal and
the 38 kHz subcarrier. The MPX FILTER switch is pressed in order to
safeguard against incorrect operation of the Dolby circuit due to
these signals. Release the switch for any other recording. The
switch does not function during playback.

OQ
® Bottom Plate
Remove screws B.
:
o
3
2
ee
o§
2
Ro
nan
-
oO
5%
2Oc
w
ono
+
@
c
7
e
2
¥~3
gw
EE
foi
oe
St
53
ax
430
mo
=
oteval
ei
cZ3e¢
om
~
oO
Oar
Eat
e
B>'c
erat
SSees
wee
le
e
WA
Sy
RV
Aik
isety
Remove screws F (front side)
@ Tape Transport Mechanism
and G (upper side).
Front panel
DISASSEMBLY
e Door Assembly
Open the cassette holder,
and pull up the door assembly.
Door assembly
3.
Disassembly
Fig. 3-1

Removing the Head Assembly
1. Remove the two azimuth adjustment screws
and remove the stopper holder.
2. Remove the stopper.
3. Push the slide plate all the way to the right (the
forward position) and pull the head assembly
in the direction of the arrow to remove it.
: on Head azimuth screw
i
i. < i
Stopper
=
Head assembly oe .
Fig. 3-2 Disassembly of the head assembly
Reassembly Precautions
When replacing the head assembly, be sure the
gears mesh as shown in Fig. 3-3.
Head assembly
Smail protrusion
(The second tooth on the sector
gear should be aligned with this
mark.)
Sector gear
Slide plate
Fig. 3-3 Relationship between head assembly
and sector gear
Removal of the Capstan Belt
Undo screws (F), remove the capstan motor
control ass’y, and then remove the capstan belt.
Capstan motor
control assembly
Idler pulley
assembly
Capstan belt
Capstan rotor
assembly Sub capstan
assembly
Fig. 3-4 Removal of the capstan belt

4. PARTS LOCATION
Parts without part number cannot be supplied.
The /\ mark. found on some component parts indicates the importance of the
safety factor of the part. Therefore, when replacing, be sure to use parts of identical
designation.
e For your Parts Stock Control, the fast moving items are indicated with the marks
wk and *.
*#k GENERALLY MOVES FASTER THAN *.
This classification shall be adjusted by each distributor because it depends on model
number, temperature, humidity, etc.
Front Panel View
Knob (INDEX SCAN)
RAC-330
Knob (MEMORY)
RAC-338
Knob
(MS/SKIP)
RAC-331
Knob (COUNTER RESET)
Knob (MUSIC REPEAT
Se oae nab ( Cc AT)
RAC-332
Knob (BLANK SEARCH)
RAC-333
Dummy knob
RAC-339
Bonnet case
Knob (DOLBY NR, TYPE)
RNA-608
RAC-337
*&* Door assembly
Dummy knob
RXB-837
RAC-339
Front panel
RAH 452 Dummy knob assembly C
R XB-784
Eject knob assembly
ear:
me
oem:
:
ee
prey
keer]
bed
bee
beard
ea
oa
Indication
panel
RAC-329
am
: i
:
-
4
RNLESS
Knob
(Timen)
———_____sh.
a
Knob
(MODE)
RAC-314
a
ne
: os : ms = RAC-309
Fel. Sess (MPX FILTER)
RAC-336
Power knob cap
RAD-196
Sash
RAH-453 Knob (INPUT)
RAC-326
Switch assembly B
RXB-870
10

CT- 7OR
Front View with Panel Removed
* LED (D1)
SLF-201C
Indicator assembly B
RAW-193
Cassette
plate
assembly
————___==—==—
4
cf
E
|
--——
Prone
jack
(MIC)
RXX-402
i
:
mg
:.|.--|
|
=
RKN-080
%*&* Pinch roller arm assembly
RXB-550
Phone Jack (PHONES)
RKN-081
* Erase head with sensor
RPB-103
Sub panel stay
RNL-577
*k* REC/PB head assembly
RXX-401
* Erase head *xk Pinch roller arm assembly
RPB-101 RXB-550
Top View
A\ *& Transistor (0342)
28D1265-P
A i% Transistor (Q349)
2SD1265-P
Mute assembly
RWX-844
AN Strain relief
REC-395
A AC power cord
RDG 048 Dolby NR assembly
RWX -838
A\* Power transformer
RTT-329 Mother assembly
RWX-833
RM control assembly D
Z\ %*& Push switch (POWER)
RSA.063
CM control assembly
RWX-654
. N Bugs te ceer A P Control assembly
: ST if RWX-839
ee
‘ ———____ MIC amplifier assembly
‘$$ RWX-841
a Th
es 1 SW assembly
RWS-197
41

5. EXPLODED VIEW
Mark No.
kk
11.
13.
ke 14,
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
35.
36.
37.
38.
39.
40.
41.
42.
43.
44,
A ow 45.
12
akan >
SO OND
Part No.
RNA-608
RBH-901
RAC-329
RNL-590
RXB8-837
RBM-012
RAH-452
RXB-870
RAH-453
RBM-011
RXX-402
Refer pp. 15-18.
RCG-006
RSA-063
RNL-623
RNT-033
RAC-314
RBH-982
RAC-315
RAD-196
REC-355
RBN-006
RAW-193
REC-399
RNL-655
RAC-309
RWS-197
RBH-981
RNL-577
RAC-339
RAC-335
RAC-330
RAC-331
RAC-332
RAC-333
RAC-337
RXB-784
RAC-338
RAC-336
RAC-326
RNL-638
RNE-513
RTT-329
e Parts without part number cannot be supplied.
e The A\ mark found on some component parts indicates the importance of the
safety factor of the part. Therefore, when replacing, be sure to use parts of identical
designation.
e For your Parts Stock Control, the fast moving items are indicated with the marks
wk and *.
kk GENERALLY MOVES FASTER THAN *.
This classification shall be adjusted by each distributor because it depends on model
number, temperature, humidity, etc.
Description : Mark No. _ Part No. Description
Bonnet case A 46. RDG-048 AC power cord
Eject spring A 47. REC-395 Strain relief
Eject knob assembly 48. REC-369 Foot assembly
Spacer AO el ha ees
Door assembly BOL ise dee cts
Plastic rivet Bi. RWX-839 Control assembly
Front panel 52. RWX-833 Mother assembly
Switch assembly B 53. RWX-838 Dolby NR assembly
Sash 54. RWX-841 MIC amplifier assembly
Plastic rivet 55. RWX-844 Mute assembly
Cassette plate assembly * 56. SLF-201C LED (D1)
Tape transport mechanism Sy a ee a
Ceramic capacitor (C1) =|: ee
Push switch (S1, POWER) aera
Rod 60. sseseas
Panel stay 61. FBT40PO80FNi Screw4x8
Knob (TIMER) 62. BBZ30PO80FMC Screw 3 x 8
Spring 63. VBT30PO60FMC Screw 3 x 6
Knob (POWER) 64. PBZ20PO60FMC Screw 2x 6
POWER knob cap 65. PMB26PO50FMC Screw 2.6 x 5
Skid 66. VPZ30PO80FMC Screw 3x 8
Nut 67. PMB30POSOFMC Screw 3x5
Indicator assembly B 68. BBZ26PO60FNi Screw 2.6 x 6
Diffusion sheet 69. V8BZ40PO80FMC Screw 4 x 8
Indication panel WO; © oceth send 2
Knob (MODE) 71. Cushion
SW assernbly 72. Felt
Spring 73. Connection cap
Sub panel stay 74, RM control assembly C
Oummy knob 75. Timer switch assembly
Knob (COUNTER RESET) 76. Chassis
Knob (INDEX SCAN) 77, Heat sink
Knob (MS/SKIP) 78. Transistor B assembly
Knob (MUSIC REPEAT) 79. Transistor A assembly
Knob (BLANK SEARCH) 80. Bottom plate
Knob (DOLBY NR, TYPE) 81. Spacer
82. P.C. board holder
Dummy knob assembly C 83. Stopper
Knob (MEMORY) 84. Transformer base
Knob (MPX FILTER) 85. fb letivaus
Knob (INPUT)
VR slider
Cord fixer
Power transformer

CT-7OR
Ney
EH
Hf
WG
Ca
>
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SALE
LSE
AX
\
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is
Wa
14
>

Parts List of Tape Transport Mechanism
e Parts without part number cannot be supplied.
e The /{\ make found on some component parts indicates the importance of the
safety factor of the part. Therefore, when replacing, be sure to use parts of identical
designation.
Mark
e For your Parts Stock Control, the fast moving items are indicated with the marks
wk and *.
wk GENERALLY MOVES FASTER THAN *.
This classification shall be adjusted by each distributor because it depends on model
number, temperature, humidity, etc.
Mark No. Part No, Description Mark
1. RNL-266 Lock arm
2. RNL-265 Eject prevent lever
3: RBH-957 Lever spring
4. RNL-261 Cylinder
5. RBH-937 Damper spring
6. REB-447 O-ring
7. RNL-510 Piston
8. RBH-861 Pinch return spring (L)
9. RNL-267 Sub pinch arm
10. RBH-851 Pinch pressure spring (L) Ak
wk 11. RXB-550 Pinch roller arm assembly
12, RNG-319 Cam follow lever
13. RNL-435 Hook (L)
14. RNL-436 Hook (R)
15. RNL-255 Connection plate
16. RNL-306 Pinch plate
17. RNH-077 Change plate
18. RNL-509 Actuater
wk 19. RXX-359 Reel motor assembly
20. RXX-365 Rotor assembly
21. RNH-252 Shield plate
22. RNL-541 Pocket L
23. RBK-174 Pressure spring
24, RNL-542 Pocket R
* 25. RPB-103 Erase head with sensor
* 26. RPB-101 Erase head kk
27. RBH-863 Height adjust spring (L)
28. RBH-864 Height adjust spring (R)
29. RXB-671 Erase head base assembly
30. REF-022 Steel ball (3¢)
31. RBH-853 Azimuth spring
32. RNH-140 Stopper holder
33. RNL-262 Stopper
kk 34. RXX-401 REC/PB head assembly
35. RXB-661 Housing
36. RNL-312 Sector gear
37. RBH-906 Gear spring
38. RNL-317 Slide plate
39. RNH-146 Head base spring
40. REC-377 Shield sheet
41. RBH-946 Arm spring
42. RBH-944 Switch lever spring A
43. RNH-198 Switch lever
44, RNL-506 REC detector arm
45. RNL-507 Chrome detector arm
No.
46.
47.
48.
49.
50.
51.
52.
53.
54.
55.
56.
57.
58.
59.
60.
61.
62.
63.
64.
65.
66.
67.
68.
69.
70.
71.
72.
73.
74.
75.
76.
77.
78.
79.
80.
81.
82.
83.
84.
85.
86.
87.
88.
89.
90.
Part No.
RBH-945
RNL-508
REB-473
RNL-433
RBH-927
RNL-434
RBK-176
RBH-847
RXB-620
RXP-111
RNL-256
RNL-307
RNL-308
RBH-846
RNL-257
RNL-309
RBF-030
REF-023
RLB-434
REB-260
RBH-961
RBH-962
RNL-264
RXB-696
RXX-395
REB-480
RBH-923
RNH-064
RXX-334
RNH-202
RXB-697
RWX-654
RBH-862
RNL-268
RBH-852
RXB-699
RNH-220
Description
Switch lever spring B
Metal detector arm
Brake shoe (B)
Brake plate L
Brake spring
Brake plate R
Half set spring
Spring (R)
Idler pulley assembly
Plunger solenoid
Trigger lever (L)
Assist gear (L)
Assist gear (R)
Spring (L)
Trigger lever (R)
Reference pin
Oil stopper washer
Steel ball (49)
Guide roller
Stopper
Ratch spring (L)
Ratch spring (R)
Eject lever
Sub capstan assembly
Capstan rotor assembly
Capstan belt
Spring (B)
FG plate
FG coil assembly
FG shield plate
Housing
CM control assembly
Pinch return spring (R)
Sub pinch arm R
Pinch pressure spring (R)
Metal sleeve assembly
Shield plate F
17
Mark
No.
Part
No.
Description
Mark
No.
91.
YE30FUC
Washer
E-type
111.
92.
VCZ30PO60FMC
Screw
3
x
6
112.
93.
PMA30PO60FMC
Screw
3x
6
113.
94.
YS24FBT
Washer
C-type
114,
95.
VCZ26PO60FMC
Screw
2.6
x
6
115.
96.
YE25FUC
Washer
E-type
116.
97.
ATZ26PO80FMC
Screw
2.6
x
8
117.
98.
VCZ26P140FMC
Screw
2.6
x
14
118.
99.
ATZ30PO80FMC
Screw
3
x
8
119.
100.
RBA-073
Special
nut
120.
101.
RBA-080
Azimuth
screw
121.
102,
BMZ2GPO50FMC
Screw
2.6
x
5
122.
103.
YE20FUC
Washer
E-type
123.
104.
WA017D034D025
Washer
124.
105.
WA21D040D025
Washer
125.
106.
RBF-058
Washer
126.
107.
PMA26POSOFMC
Screw
2.6
x
5
127.
108.
BMZ26PO80BNi
Screw
2.6
x
8
128.
109.
RBF-059
Washer
129.
110,
wo...
130.
No.
Part
No.
Description
Ts
RHG-624
Packing
case
2.
RRB-214
Operating
instructions
3.
RRR-0O6
Label
4.
RNL-480
Head
base
stopper
(B)
5.
RDE-010
Connection
cord
6.
RHA-251
Pad
Part No.
Description
Cord fixer
Holder B assembly
Cord fixer
Head base assembly
Main shaft
Arm assembly
Chassis
RM control assembly C
Side frame R
Side frame L assembly
Cushion
Stopper
18

PA2011
PA2009
PA3010
PA2012
PA2010
MS218L '
S NJM4558D ss
BA4558 ?
AN6552
Index
PA3012
PD6006
18
External Appearance of Transistors and ICs
28C1815
282240 are
2SA1015 TyPe No
hee
2SC2634NC
2SA1127NC
Type No
hee Lot No
2SC1740LN
2SA933LN Tyne Ne
Suffix
nee Lot Now,
2SA934
2SC2060 Type No
hee Lot No
E
c
8
2SD882
2SC2497
2S8D1189
CT- 7OR
2SA881 Lot No
2S8C2458
28C1173
2SD880
2S8C1383NC
Type No
2SD1265
2SC2021
19

TRANSISTOR
A ASSY
HEAD ASS’Y
RXX - 401
RCH UCH
CONNECTOR
ASS'Y
MIC AMPLIFIER ASS’Y
RWX - 841
20 1
4
MOTHER ASSY RWX-833
0
"0349
NJM45680
BAas5e
AN6552
PA30IO
25A933LN
r 28Al015
or 25)
25088)
i ispar3
25aeBt
or 2SAN127NC
320,344 2S5C1383NC
C2060.
VR301
VR303
9340
>
9339 0343
a3
Q304
54
305 9346,353
Q3a7 DI
SLF ~ 20{C
ST SOST
oO
9309~ 312, 318, 333,334
2SCITAOLN- 5
D =T
or 28¢2a97-R
or) 280882 - a
+Q0303.,306 1k 60
3 03077341 314-317, 318,3
10.7 2305328, 331,
VR306
Q319
0320
Q32t
314 a316
9322
Q332
o3s7~
0338
Q333
9334
336,337
9331 9344
19330,329
0328
362
Q335
iC 303
ic302z
O3I7
C4i0,01
0356 /AC 250
0355 RCG -006
a2 ico om Oo 14
310 RTT-329
AC {20V
60Hz
AC POWER CORD
ROG- 048
{3 TRANSISTOR
Q1306
014305
Q1302 41304
Qi304 Q1303
O13O1, (304, 1305 OZ0IN 1309452473 or USIOGO.
2SCi740LN
104302, 1303, (306
2SA933LN or
2SAI015 or
2SA1427NC
MUTE ASS'Y
RWxX - 844
INDICATOR AS
ok
(REV) (FWO)
a Ts o
pp -
(PLAY) (RE
FL
t
f
$2 oe

4
MOTHER ASS Y RWX-833
356
Q¥2 IC301
9310
5
6
7
8
9
INDICATOR ASS'Y B RAW- 193 _
C4
0.04
ee
[
e z
pee,
a
ane
Penn
veave
ita
|
/AC250
S|
oe
|
ee
fe
Oo)
aay
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7
|
|
|
sa
LANSKY
Pat
fara
+
|
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238
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=
sz
|
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|
RTT-329
|
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be
|
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|
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4
toy
ti
1
—
Tae
eee
eee
eae
Piel
foo
|
te
i
AC
420V
|
60Hz
4
bet
AC
POWER
CORD
||
a3oq
0339
9343.
RDG~
048
KNORM)
(CrO2
MMETAL)
|
|
—
ee
ay
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|
amd
|
|
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:
nese
:
-
nace
VR302
see
|
|
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5.6
105
ee
|
ais
aston
9305
0346,365
Ol
faa]
TRANSISTOR
-
=
8
Yui
Yue
i
:
iF
or
2SAL127NC
R303
SLE
=
20iC
a
:
1
|
320,344
25C1383NC
YR304
|
356
--}3Sor265..P
B
ASS
Y
c
|
or
25C2060
307
F
—~
Q347,
354
rey
Nay,
i or 254934 0352
i] E Oat
“Sasi9 250880 0308
2SCI740LN-S
—
enemies
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250802
6
|
(REV)
(EWD)
DIRECTION
STOP
0
0303-306
1
60
Qi306
FECIO.7
s2ahised
331,393
coat
ae
01305
|
i
33
|
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op
URiog
1302
91304
4
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se
ie
0320
a
4304
1303
|
9
|
£20322,
7)
VR306.
Q32i
or
US:
(Sane
—
—_4—_
|
ee
wsc7acuN
SWITCH
ASS
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B.
RXB-870
ee
ee
21502,
03,
1306
ae
=
=
9322 SAI33LN © f
25015
or
|
(PAUSE)
_
25A1427NC
|
(PLAY)
(REC)
I
|
ae
a
[(REC
MUTE)
pee
easoio
19330,329
{
MUTE
REC
PLAY
|
PAUSE
FF
4
REW
STOP
|
y
Q328
i
VR307.
i
l
oO
ll
al
al
‘l
l
“ll
Q357~ 362
0338S
i ]VR309 0338
0336,337
VR3I3—.
VR3I8-
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16
4
8
j
i
VRE
I.
i VR3I2
£ VR3IO
vR308 0318
1€303
tT
MUIE ASSY
Q333.
1c302
RWX
=e
844
YR3!9|
0334
o3ir
——
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a
ee
Los
it
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CO
CO

|
@2OS8OQ09 09009
A
1C604
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ROOT 22k.
[oleae
years
IC6Ol,
602
PAIOAZ
DEO...
IS2473
O6O1~604, 2SC{740UN
OF
Q607
DOLBY NR».
8
SH2 © oS TON
MPX { [ 1
FILTER | a
eras
| R665. 82k
pe
RESI.
Q901 2SCI740LN
soeres
0901n, 907 © AG3932S__
0909 182473 or USIO40
DOLBY
NR
ASS'Y
RWX-838
SW
ASSY
RWS—197
0804 0805 _1c802 a801
| 9803
0802
RAO3 100 _|[eo eo eo oe eo a 6
au edt
TIMER
SWITCH ASS'Y
e00068 05006000000
ee
cae |
| aNROL es a ae

10
RM CONTROL ASS'Y D
IC201 Q204Q205 Q201 a202
SOL.L
RXP-144
VRIOL
C104 IC1O2 Qos O13
C104 PA2ZO14
{C102 PA2OI2
isc2497
SO1189
i svi
2 WO3Ry or WOE
G4 152473 or USIO40
RCX O10 or RCX -O
250934
2SA86t
CM CONTROL ASS’Y
RWX - 654 Pee N |
{4
FG COIL ASS'Y
RXX -334
of ERASE HEAD
fs RPB-104
ERASE
HEAD
RPB-i03
10
11