Pioneer CT-110 User manual

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ORDERNO.
ARP-215-O
STEREOCASSETTETAPEDECK
GT-llo
This
servicemanualisapplicable
Cemanuel
d'instruction
serefdre
Este
manualdeserviciotlatadel
CONTENTS
r. sPEcrFrcATtoNs
2- FRONTPANELFACILITIES
. , , ,
3. CIRCU|TDESCF|PTTONS.
.... ... ..
4. BLOCKDIACBAI!1
5. DISASSEI\4BLY
6. PARTS LOCATION
7. EXPLODEDVIEWS
AND
PARTS
LIST
,
PIClNEEFI ELEciTFIc!NIC CClFIFc'FATIclN
FIoNEEFT
ELECTFONTC€ (UAAI tNC. r9e5E OomnsuezSr,L
PToNEEF ELEcTFoNtc [EUFolPEI N.v.
FIONEEE ELECTEIONIC
to theZEtype.
aumode der6glage.
enfrangais.
metododeaiuste
esclitoenespafrol.
2
3
10
12
l3
lt.
12-
2l
23
24
27
30
8. ELECTBICALPARTSLIST.........
9. PACKING
]0. P,CBOABDS
CONNECTIONDIAGFAIV . . . .
SCHEfu'IATICDIAGRAN]
ADJUSTMENTS
YZ G) SEP.lq32 Prlnredin J:pdn

1.
SPEC|FtCATIONS
Systems Compact
cassette,2-channelstereo
Heads
. . . .
"Hard
Permalloy"
recording/playbackheadx
1
"Ferrite"
erasingh€adx 1
....... DCservomotorx 1
Nomorethan0.05%
(WRMS)
No
more
than
10.17%
(OlN
)
. Approximately
'l
10
seconds
{C-60
tape)
Input
(Sensitivity/l\4aximum
aliowableinput/lmpedance)
MIC
(L,
R) . .0.35mV/57mV/10.5kO,6mm
diam.
jack
(Reference
MICimpedance;250fl
to 1OkO)
LfNEflNPUT) . . . . . . . 50mV
/25Vl75kO
Output
(Reference
level/Load
impedance)
LINE(OUTPUT) 45OmV/50kf,2
SUBFUNCTIONS
. Dolby
NRsystem
(ON/OFF)
Btype
. 3 position
tapeselector
(NoFM/croz /M
ETAL)
. lCfull logic
control
. Air dampejectfunction
a Fullautomatic
stopmechanism
o One-touchrecording
system
. LEDlevel
meter
MISCELLANEOUS
PowerRequirements
.. .
.,. ......DC20V
Dimensions .420 (W)
x 101
{H)x 237
(D)
mm
16-9/16
(W)
x 4 (H)
x 9-3/8
(D)
in.
Weight
(without
package)
.
FURNISHED
PARTS
Connectioncord
DCPower cord
NOTES:
3.3k9
{7
lb4 oz)
1. ReferenceTapes: Normal& LH:DIN45513/BLATT
6
orequiv.
CrO, DIN 45513/BLATTT
(CrOz
)
orequrv.
2. ReferenceRecordingLevel: fvleter 0dB indicating
level ('l60nwb/m magneticlevel = Phillipscassette
reference
level)
3. Reference Signal:333H2
4. Wow & Flutter:
. JIS [3kHz,
with acousticcom-
pensation
(weighted)
rmsvalue]
DIN [3.150H2, with
acoustic
compensation
(weighted)
PEAK valuel;DIN
45507
5. FrequencyResponse:
a Measuredat -20d8 level.
DOLBY NR OF, leveldeviationis 16dB without
indication.
6. Signal
to NoiseRatio:
o Measured
at thethirdharmo-
nic distortion3% level,weighted
(DlN 45513/
BLATTT).
7. Sensitivity: Input level
(mV) requiredfor reference
recording level with input (REC) controls set to
maximum.
8. MaximumAllowableInput: While
decreasingsettings
of input (REC) level
controlsand increasinglevelat
input
jacks.
thisisthemaximuminputlevel
(mV)
at
the point whererecordingamplifier
outputwaveform
becomes
clipped.
9. BeferenceOutput Level:Playback
output levelwhen
meter
indicates0dB.
l\4otor.
. .
WowandFlutter.......
FastWindingTime
......
Frequency
Response
- 20dBrecording:
Normal
tape
Chrometape
lvletal
tape
Signal-to-NoiseRatio
DolbyNROFF.........
NoiseReductionEffect
DolbyNRON.........
HarmonicDistortion
. . . . . . .30to 16,000H2
(40
to 15.000H2
t3dB)
.......30to16,000H2
(40
to 15,000H2
i3dB)
.......301o16,500H2
(40
to 15,000H2
l3dB)
...... Morethan5TdB
Morethan
10dB
{at
skHz)
Nomorethan
1.0%
(0dB)

2.
FRONT
PANEL
FACILITIES
@ eowen
swrrcH
Pushing
this switch turns on the power and causesthe power indi-
cator to light. Push the switch again to release
it when switching
off the power to the unit.
. The muting circuit is
activatedafter the POWER
switch has been
set to ON and the unit will not operate for about 4 seconds.
Thisisnot a failure
or malfunction.
. When
the POWER
switch is setto OFF while
theunit is
operating,
the unit's operation is released
and the stop mode isestablished.
@ e.lecr
BUTToN
Push this button to open the cassetteholder. To close the cassette
holder,
push
the top back until it locks.
. Do not press
this button while the tapeismoving.
@ cnsserrE
DooR
@ reee
couNTER
This shows the position of the tape by means
of a 3-digit meter.
@ coururEn
REsETBUTToN
Push
this button to reset
the tapecounterdisplay
to 000.
@ eowen
tNDtcAToR
@ nec
tNDtcAToR
Thislights
duringthe recording
mode.
@ enuse
rNDtcAToR
Thislights
duringthe pause
mode.
@ LEVEL
tNDtcAToRs
These
indicate
the input level
during recording
and the output level
duringplayback.
@ rurucrroN
swtrcHEs
O (REC) : Push
thisswitch to startrecording.
When
depressed
to the ON position, the REC indicator tights.
The switch does not work when a cassetteis not
loaded or when the erasure prevention tabs of a
loaded cassettehavebeen broken off.
< (REWI : Push this switch to rewind the tape at high speed
(from right to teft).
>> (FF) : Pushthis switch to send
the tape forward at hiqh
speed
(from left to right).
I (STOPI : Push
this switch to stop the tape travelling
and to
release
the function switches.
tl (Pausef: Push this switch to stop the tape temporarily
during recordingor playback. Releaseit to allow
the tape
to resume
traveling.
The tape does not stop during fast forward or re-
wind operations
even
when tne ll (nause)
switch
as
pushed.
@ reeesELEcroR
swtrcHEs
These
selectors
allow the tape's
biasandequalization
characteristics
to be selectedduring recording
and the equalization
characteristics
duringplayback, in line
with the type of tapebeingused.
Normaltape : Release
the teft switch to the "out" ( I ) posi-
tton.
Chrometape : Push the left switch to the "in" ( - ) position
and release the right switch to tlre "out" ( I )
oosition.
Motaltapo : Push both left and right switches to the ,'in"
position ( - ).
@ oolav* NR
swtrcH
Push this switch to ON when recording with the built-in Dolby
noise reduction system and when playing back tapes
which have
been recordedusing the system.For other tapes,
do not pushthis
switch.
@ rurc
JAcKs
These
are the input jacks for microphone recording.plug the left
channel microphone into the L jack and the right channelmicro-
phone
into the R .iack.
@ rrueur
LEvEL
coNTRoL
Usethis to adlustthe level
of the input signals
from the MIC iacks
or from the rear
panelLINE INPUT terminals.Rotating
this
control
clockwise
increases
the level.
For further details,
referto SETTING
THE
RECORDING
LEVEL.
The word "Dolby" and D0 are trademarks
of Dolby Laboratories
Licensing
Corporation.
NoiseReduction Systemmqnufacturedunder licensefrom Dolby
Laboratories
Licensi
ng
Corporation.
5

3.
CIRCUIT
DESCRIPTIONS
3.1 PLAYBACK
CIRCUIT
The signal from the playback head is amplified
by the Q102/Q103 2-stagedirect-coupled ampli-
fier. In the NORM position, the playback equali-
zation (120ps) compensation is achieved by the
NF circuit between the Q103 collector and Q102
emitter. In the METAL and CrOz positions,Q104
is turned on, and the equalization characteristics
switched from 120ps to 70ps to compensatethe
frequency response. The level of the EQ AMP
output is set by a variable resistor, and further
amplified by the Q401 flat amplifier before being
parised
through the MPX filter and applied to pin
2 of the Dolby IC.
This Dolby circuit consistsof IC401 (HA11226),
and the Dolby ON/OFF switch is linked to the
MPX filter ON/OFF switch. When the Dolby
switch is OFF, the 19kHz filter is bypassed.
The Dolby circuit output appears at pin 8 of
IC401, and is passed to LINE OUTPUT via a
switchingIC (IC402).
3.2 RECORDINGCIRCUIT
The input signal from the microphone jack is
amplified by the microphone amplifier IC101, and
passed via the MIC/LINE selector switch to the
INPUT volume control where the input level is
adjusted. This adjusted signal is passedvia IC103
to flat amplifierQ40l. D313 andD314 in the stage
before IC103 form a protector circuit designed
to protect IC103 from large input signals. The
signal amplified by the flat amplifier is pa.ssed
via
the MPX filter to pin 2 of the Dolby IC, the output
appearing at pin 8. The level of this output is
adjusted by variable resistor. Then after equaliza-
tion in the REC AMP (Q106) in accordance
to
the type of tape being used, the signal is passed
to the recordinghead. +g
3.3 CONTROLCIRCUIT
The control circuit in this deck utilizes a one-
chip IC (PM90028) which enablesfeather-touch
operations. In addition to mechanism control,
this IC also includes auto-stop function. And due
to the digital counter frequency divider system
employed in timing settings for the mechanism
control, all operational timing discrepancies have
been eliminated. The PM9002B pin layout is
shown in Fig. 3-3, the functional block diagram
in
Fig. 3-2, and the output pin time charts during
different modes in Figs. 3-4 and 3-5. For inter-
relations between circuits, see the block diagram
onpage
10,11 andin Fig.3-1.
4
Operations
duringEachMode
The mechanical operations effected by the
following circuit changes
are described in the next
chapter (seepage
7).
1.When
the POWER
Switch is SwitchedON
When the POWER switch is switchedon, *5V is
applied to pin 1 (Vcc) of IC102. During the initial
period when pin 1 voltage is being increased from
0V to 5V (approximately from 0.6V to 2.4V) the
IC's intemal reset circuit is activated, putting the
IC into stop status which is maintained for about
four seconds
after the power switchisswitchedON.
During this time, no change can be effected by
pressing
any of the other operation control buttons.
REC/PB
head
LINE
OUTPUI
rcroz
PM9OO2
B
pquse
an
REC REC
pr-a
y REc
STOP PAUSE
REW BIAS
osc
oFa
MUTE
SIGNAL
MS
LINE
PINCH MUTE
REw "iI&,
Er ENO
OETECT
TIME
Fig.3-1 Controlsystem
blockdiagram

2. PlayMode
When the PLAY button is pressed,
the level of
pin 5 (FLAY) of IC102 is switched to "L" level,
and the level of pin 24 (PINCH SOL) to "H"
level. Q306 is turned on and the pinch roller
activated. In addition, IC7O2 pin 27 (LINE
MUTE) is opened 416ms after the PLAY button
is pressed, thereby releasing the line mute status
to enable play mode operations to commence.
3. RecordingMode
When a cassettehalf with its erasureprevention
tabs intact is loaded in the deck, pin 3 (AR) of
ICLO? is switched to "H" level, thereby enabling
the deck to beswitchedto recordingmode.
When the REC button is pressed,IC102 pin 4
(REC) is changed to "L" level. Pin 20 (RE'C) is
also changedto "L" while pin 19 (REC) is open.
As a result, the REC indicator lights up and the
reed relay (RY301) is switched off, thereby
switching the signal path to the recording circuit.
And the IC102 pin 24 (PINCH SOL) changed
to
"H" level, tape transport is commenced. Pin 22
(BIAS OSC) is opened 52msafter the REC button
is pressed, thereby activating the bias oscillator.
Pin 27 (LINE MUTE) and pin 28 (REC MUTE)
are opened 416ms after the REC button ispressed,
thereby releasing the line mute and recording mute
statusto permit recording to start.
4. FastForwardMode
When the FF button is pressed,IC102 pin 8
(-F-F)
is changed to "L" level, followed by pin
26 (FF SOL) being changedto "H" level 416ms
later. Q304 is thus turned on, activating the FF
solenoid to start fast forward operation.
5. RewindMode
When the REW button is pressed,IC102 pin
? (REW) is changedto "L" level, followed by pin
25 (REW SOL) being changedto "H" level416ms
later. Q305 is thus turned on, activating the REW
solenoidto start rewind operation.
6. PauseMode
The pause mode in this deck is released by
pressingthe PAUSE button. The pause mode is
not released by pressing the PLAY button during
play/pause mode, or the REC button during re-
cording/pausemode. Note, however,that pressing
the PLAY button during recording/pausemode
switchesthe deck to play/pause
mode, andpressing
the REC button during play/pause mode switches
the deck to recording/pause
mode.
If the PAUSE button is pressed
during stop mode,
pin 2 (PAUSE)and pin 21 (PALJSE) of IC102are
both changedto "L" level,thereby lighting up the
PAUSE indicator. When both the PLAY and
EX0
+tzy PULSE
LINEMUlE
RECMUTE
Bras
osc
REC
AR
REC
pTiv
s-ioF
n-EF
n
vcc
plu *
RECIUTE
LITEMUTE
FF SOL
REW
SOL
Pr{ca soL
AUTO
STOP TIME
ENO PULS€
NFg
5
1,,,'
l
Fig.3-2 PM9002B internal
blockdiagram Fig.3-3 PM9002B
pin
layout

PAUSE buttons are pressed, IC702 pin 2t is
changed to "L" level, and the PAUSE indicator
lights up. And since pin 27 (LINE MUTE) of
this IC is changed to "H" Ievel, the signalcircuit is
muted. If the REC and PAUSE buttons are both
pressed,
IC102 pin 20 tnEel and pin Zf (FAUSB)
are changed to "L" level, resulting in both the
REC and PAUSE indicators lighting up, and the
signal circuit being switched to recording circuit.
Furthermore, pin 27 is opened,permitting output
of the signal to LINE OUTPUT, but sincepin 28
has been changed to "H" level, recording mute
modeis maintained.
o Timing
Chart
7. Auto-stop
Mode
A photo-interrupter output is applied to pin
16 (END PAUSE) of IC102 during tapetransport,
resulting in the capacitor connected to pin 17
(C312) being chargedup and dischargedrepeated-
ly. The potential at pin 17 is thus kept below the
threshold voltage, and prevents activation of the
auto-stopmechanism.
When tape travel stops and the take-up reel stops
turning, the photo-interrupter output is no longer
applied to pin 16, and the potential on the ca-
pacitor connected to pin L7 (CgLz\ continues to
increase until it exceeds the threshold voltage.
The IC is thus switched to stop mode, thereby
stoppingtapemechanisms.
Normal ooeration
\ Key input
\ .- M.d"-
Terminal \
PLAY STOP FF STOP REW STOP REC/PAUSEPAUSE STOP REC STOP PAUSE PAUSE PLAY PAUSE
lJr{
STO
PPLAY STOP FF STOP REW STOP R€C STOP REC STOP PAUSE
STOP STOP PLAY PAUSE
LINE IIUTE
( Pin 27 1
H
LI-L_
t_ t_ L
R€CMUTE
( Pin
28) t_ t_
REC
( Pin 20) LJJ
REC
( Pin 19)
HI I
ErAS OSC
I Pin 221
HJJ
PINCH
SOL
( Pin 24)
H
FF SOL.
( Pin 26)
H_,r-
REW SOL.
( Pin 25)
Hr
PAUSE
( Pin 2t,
Fig.
3-4 PM9002B timechart

Normal op€rataon Oirsct changs
\ Key input
\ -M;A\ FF Blank
REC PAUSE
Terminal \STOP REC
LINEMUTE
I Pin ?rl
H
LL
RECMUTE
( Pin 28) t_
REC
( Pin 20l
H
REC
( Pin 19)
fl
8r
AS
( Pin osc
221) HJ
PINCH SOL.
( Pin 291
tl
L
FF SOL.
( Pin 26)
H
REWSOL.
( Pin 251
H
PAUSE
( Pin 2l)
Fig.
3-5 PM9002B timechart
3.4 MECHANICAL OPERATIONS
PlaybackMode
The CT-110 makes use of the capstan torque
when shifting the head baseduring playback mode.
(Both the recording/playback and eraseheads are
mounted on the headbase).
o Stop
Mode
(see
Fig.3-6)
The head base shift mechanism during stop
mode is shown in Fig. 3-6. Operating lever (A)
pressesdown towards cam (C) due to operating
lever spring (B). With cam (C) combined with cam
gear(D), clockwise torque is applied to this cam
gear. Solenoid P is inactive, and the hook of gear
lever (F) is kept againststopper (G) of cam gear
(D) by the cam gear retum spring (E), thereby
keeping cam gear (D) stationary. The flywheel is
belt-driven by the capstan motor, and rotates
counterclockwise together with the capstan gear.
Gearleverreturn
spring
(E)
Cam
gpar
(Dl
SotenojF Operatinglever'Spring
(
Bl
Capstan
gear
Nff."
Fig.3-6 STOP
operation

Switch
toPlaybackMode
fromStop
Mode
(see
Fis.
3-7)
1. Solenoid P is activated () , and the hook of
gear
lever(F) isreleased
from stopper(G) O .
2. Operatinglever (A) is pressed
down onto cam
(C) by operating lever spring (B) O , ctun
gear (D) rotates @ .nd engages
capstangear
(H)0.
Solenoid
P \e/ t!,
Fig.3-7 STOP
-+PLAYoperation
1
Switch
toPlayback
ModefromStop
Mode
(see
Fig.3€)
3. Cam geax (H) continues rotating due to
capstan gear (H) @ , attd cam (C) pushes
operating
lever(A) up O .
4. After cam (C) passes
the point of maximum
lift, cam gear (D) disengages capstan gear
(H)o.
(D)
Fig.3-8 STOP
-+ PLAYoPeration
2
Switch
to Playback
Modefrom StopMode
(see
Fig.
3'9)
5. Operating lever spring (B) forces operating
lever (A) to press against cam (C) €) ,
thereby tending to continue the rotationary
motion of cam gear (D), but since stopper
(G) catches the arm of gear lever (F) (E ,
cam gezr (D) stops rotating and operating
lever (A) becomes stationary (playback
mode).
(B)
Fig.
3-9STOP
-+PLAYoPeration3
o Operation
of Different
Parts
As can be seenin Fig. 3-9, the head base
drive
pin of operating lever (A) rises during playback
mode. This pin forces the head baseup through
the action of the HB drive spring. The pinch
pressuer spring is also lifted at the same time,
iorcing the pinch roller into closecontact with the
capstan. Furthermore, the brake plate is lifted to
releur" the reel brake. Pressure
is also applied to
the idler arm, resulting in the TU idler transmitting
drive gear rotation to the TU reel base (the drive
gear being belt-driven by the capstan motor)'
(see
Fig.3-10).
Drive
gear
TUreel
base
Fig.3-10
Generation
oftake-up
torque
(c)
1A)

Switchto Stop
ModefromPlaybackMode
(see
Fig.3-11)
1. When solenoidP is deactivated O , the arm
of gear lever (F) is disconnectedfrom stopper
(G) bV the action of gear
lever retum spring
(E) @
2. Operating lever spring (B) forces operating
Iever (A) against cam (C) (D , resulting in
rotation of cam gear (D) @ and lowering
of the head basedrive pin (p
3. Stopper (G) catches the hook of gear lever
(F), stopping the mechanismin the condition
shownin Fig.3-6(stop
mode).
Fig.
3-11 PLAY
-+ STOPoperation
FastForward Operation
When solenoid F is activated, the drive arm is
moved to the right, and the drive gear on the arm
engages
the idler gear, resulting in rotation of the
TU reel base
asshown in Fig. 3-12 (the drive gear
being belt-driven by the capstan motor). At the
sametime, the pin on the branch of the drive arm
pushes the brake plate up, thereby releasing the
reelbrake.
Brakeshoe
Drive
gear
TU reel
base
Brake
plate
Drive
arm Drivearmbracket
pin
Rewind
Operation
When solenoid R is activated (see Fig. 3-18),
the drive arm is moved to the left, and the drive
gear on the arm engages
the supply reel gearresult-
ing in rotation of the supply reel base.At the same
time, the pin at the tip of the drive arm pushes
the
brake plate up, thereby releasingthe reel brake.
Brake
shoeBrake
plate
I
SolenoidR
Supply
reel
base
Brake
plate Drivearm
Fig.
3-13 Rewind operation
I
Brake
plate SolenoidF
Fig.
3-12 Fastforward operation

4. BLOCKDIAGRAM
,. MIC AMPLIFIER
+
EQUALIZER
AMPLIFIER
t<_ 25 dB _____->l
CONTROL
CIRCUIT
REC,/PB
HEAD
ERASE
HEAD

20 dB --*l
I DOLBY
NR CtRcutT I
MPX FILTER
LINE
OUTPUT
swrTcH
stor :
s30r-7:
s30r-9;
s60r :
s6O2 r
5604 i
s605 .
s606 r
S9Ol r
s
r20l
DOLBYNR
FF
REW
STOP
PLA
Y
PA
USE
REC
POW
ER
INPUT
SELECTOR LINE - MIC
TAPE SELECTOR I.IOR
U - IIIEN
TAPE SELECTOR CrOa - METAL
ON - OFF
ON - OFF
ON - OFF
oN - oFF
ON - OFF
oN
-_qir
ON - OFF
ERASE
PREVENT
DETECTOR
HOLE- NOHOLE
Theunderlined
indicates
theswitch
position.
+Bt(il.7v)
+ 82(12.3v)
+83(r2.3V)
+84(5V)
REC AMPLIFIER METER
CIRCUIT
I tc
roz
HIGH
I I METAL
h6
-ql | -l
ffinu-c'o'
s30r-3 s30t-7
POWER
SUPPLY
CIRCUIT
11

5.DISASSEMBLY
Counterbelt
Volume
knobassemblyS
Volume knob panel
Eiect
knob
N.-
N
Door assembly
t1

1. Remove the bonnet by undoing screws O and
lifting the back part of the bonnet up and pull-
ing it to the rear.
2. Remove the cassette
door by pushing the eject
button to open it and then pulling it up and out.
3. The volume assemblycan be removed along with
the volume panel by pulling off the volume
knob and then undoing the volume assembly,s
hexagonalnut.
4. The counter is removed by undoing screws @
and slipping off the counter drive belt. The
counter drive belt can be temporarily rested on
the side panel R assembly of the mechanical
assembly.
5. The display assembly is removed by lifting up
and releasing the three hooks on the top part of
the front panel assembly @ , pushing down
and releasing the two hooks on the center
section, and pushing the top part of the dis-
play assemblyto the rear.
6. The froqt panel assemblyis removed by undoing
screws @
7. The mechanical assemblyis removed by undoing
screws @ and then sliding it to the rear.
WARNING:
When assembling, first attach the f-ront panel assembly,
then attach the disphy assembly. At this time be sure
to connect the ground lead to the front panel,
6. PARTS LOCATION
Front
Panel
View
NOTES:
c Parts without part number cannot be supplied.
o 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.
o For your Parts Stoch Control, the fast mouing items are indicated with the marhs
** and ,r,
** GENERALLYMOVESFASTER THAN *.
This classification shall be adjusted by each distributor because it depends on model
number, temperature, humidity, etc.
nob cap
A
RAC-287
r LED
LN31
7GP
' LED
LN21
7RP
LED
LN101111P
Volume knob assembly
RAA-372
MIC
jack
RKN-O8O
nob cap C
RAC-289
Push
knob
RAC-290
Bonnet
RN4.595
** Door assembly
RXB-724
Front panelassembly
RXB-725
Eject knob
RAC-292
Power knob
RAC-29'l
Counter
RAW.190
Functionpanel
RAH-439
Knob capB
RAC-288
IJ

Top
ViewwithBonnet
Removed
D.C.
powerjack
RNK-082
Transistorassembly
(F)
Transistor
assembly
(E)
** D.C.
power switch
R5A-062
** Motor assembly
RXM-076
** Plunger
solenoid
R
RXP-127
(RXP-I31
)
* Plunger
solenoid
F
BXP-126
(RXP-130)
RearPanel
View
Terminal
(LINE)
RKB-018
Main
assembly
RWX-637
Terminal
(LlNEl
RKB-018
LBY NR assembly
RWX-638
t* Push
switchassembly
RSG-139
Volume assembly
Sensing
assembly
Counterbelt
RE846g
14

7.
EXPLODED
VIEWS AND PARTS LIST
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NO?ES;
o Parts
without part number cannot besupplied.
o The A marh found on some component pafts indicatos the importance of the
safety factor of the part. Therefore, tthen replocing, be sureto use parts of ide.nticat
designation.
o For your PartsStoch Control, the fost mouing items are indicated with the marhs
** and.
*.
** GENERALLY MovEs FASTERTHAN *.
This classification shallbe adjusted by eoch distributor because
it dependson model
number, temperature, humidity, e
tc.
Part
List
Mark No. Part No. Description Mark No. Part No. Description
1. RNA-595
2. RBH-956
3. RAC-292
4. RX8-725
5. RXB-724
6. RAC-287
7. RAC_288
8. RAC-289
9. RAH439
10. RAA-372
11. RAH437
12. RAH-436
13.
14.
* 15. GP-4118
16. RN
L-536
** 17. REB468
18. RAW-I90
19.
20.
21
. RCV-I04
22. RAH438
23. RWX-639
24.
* 25. LN317GP
). 26. LN217Rp
** 21. Rsc-143
* 2a. LN101it1p
29. RWX-638
30. RKP-606
31.
32.
33. RKP-663
34. RWX-637
35. RKNO82
36. RKB-O18
37.
38. RKP-629
39. RKP630
40. RKP628
Bonnet
Eject
spring
Eject
knob
Front panel
assembly
Door assembly
Knob capA
Knob cap B
Knob capC
Function panel
Volume knob assembly
Volume panel
Cassette
plate
Mechanism
assembly
Sensing
assembly
Photo interruptor
Counterholder
Counterbelt
Counter
P.C.B.
holder
Volume assembly
Variableresistor
(20k)
Meter panel
Indicator
assembly
LED holder
LED
LED
Push
switch
LED
DOLBY NR assembty
Connector
socket14P
Connectorsocket10P
Connector
assembly
2P
Connector
assembly
6P
Mainassembly
D.C.
powerlack
Terminal
(LINE)
Connector
2P
Connector
3P (Bl
Connector
3P (C)
Connector
3P (A)
4'1
. RKP€24
** 42. RSG-139
43. RKP-625
44. RKP_626
45. RKN{80
46. RAC-290
47.
** 48. 25D1276
49.
50.
51. RSAO62
52. RAC-291
53. RBH-955
54. RBM-O01
55.
56. REC-355
57. REC-369
58. BBZ30P080FZK
59. PMA3OPO6OFMC
60.
Connector
10P
Push
switchassembly
Connector4P
Connector
6P
MIC
jack
Push
knob
Transistor
assembly
(F)
Transi
stor
Transistor
assembly
(E)
Power switch assembly
D.C.
power
switch
Power
knob
Earth
spring
Rivet
Mainchassis
Sliding
stopper
Foot assembly
Screw
Screw
Plate
17

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19

Part
List
Mark No. Part No. Description Mark No. Part No. Description
1. Eject lever
2. RBH-949 Eiectlever
spring
3. RBH-951 Eject spring
4. RNL-261 Cylinder
5. REB447 O ring
17. Head base
18. RBH€65 HB return
spring
19. REB416 Shaftstopper
20. RNL-527 Reference
pin
6. RNL-534 Piston 56. RBH-724 ldler pressure
spring
7. RBK-175 Pocketspring 57. RNK-999 TU idler
8. RNL-525 Pocket ** 58. RXMO76 Motor assembly
9. Lock lever 59. Flywheelholder
10. RBH-948 Lock leverspring 60. Thrust receptacle
11. RNL-529 Detecterlever 61. RXB-717 Flywheel assembly
12. RSH{58 Slideswitch ** 62. REB483 Capstanbelt
13. SideplateLassembly 63. RNE-51 3 Cordclamper
14. RNH-219 Halfspring U. Side
plate R
15. RNL-524 Half recectacle 65. YS3OFUC Washer
16. RBH-778 Returnspring
51. RXB-715 TU reel baseassembly
52. RNLOsg Cam
gear
53. RXB-723 Leverassembly
54. RBH€42 Leverspring
55. RXB-374 ldlerarm assembly
66. YS3OFBT Washer
67. VCZ26PO9OF MC Screw
68. PMZ26P1OOFMC
Screw
69. VCZ26P06OFMC Screw
70. YE4OFUC Washer
21. RXB-71
6 Metalholderassembly 71. RBFO5O Oil stop washer
22. RBH-794 HB drivespring 72. PMZ2OP1
50FMC Screw
23. Connector assembly2P 73. |MZ20Y1 50FMC Screw
* 2q. RPB-G)G Erase
head 74. RNF-989 Spacer
(0.1)
(RPBO8S) 75. PMZ26P060FMC Screw
** 25. RPB-089 REC/PBhead 76. PMZ26P030FMC Screw
26. RBH-723 Headadlustspring 77. YE2OFUC Screw
27. RNL-523 Sub headbase 78. YS2OFBT Screw
2A. RKP€63 Connector assembly6P 79. WA21D040D025 Washer
A * 29. RKP-127 PlungersolenoidR 80. WA17D032D025 washer
(RKP-l31
I
30. RNLO47 Solenoid
arm 81. PMA26P040FMC Screw
31. SolenoidbracketR
A * 32. RXP-126 Plungersolenoid
F
(RXP-130)
33. Solenoid
bracketF
34. RBH-722 Gearleverreturn spring
35. RNL-OSl Gearlever
A * 36. RXP-125 PlungersolenoidP
(RXP-1
29)
37. Chassis assembly
** 38. REB468 Counterbelt
39. PMS
plate
** 40. RXB-720 Pincharm assemblv
41
. RBH-89O Pinch
pressure
spring
** 42. REB446 Drivebelt
43. RXB-376 Drive
arm full assembly
44. RBH-725 FR spring
45. RXB-721 Reel baseassemblv
46. RBH-727 Brake spring
47. Brake plate
* 48. REB-187 Brakeshoe
49. RNK-998 ldlergear
50. RXB-714 Supply reelbaseassembly