Pioneer GT-X5 User manual

() r:loNeerl"
ORDERNO.
ARP-218-O
STEREOCASSETTETAPEDECK
GT-X5
MODEL
CT-XSCOMESIN THREEVERSIONS
DISTINGUTSHED
AS FOLLOWS:
r Thisservicemanualisapplicableto the HE and HB types.Forservicing
of the Dtype,please refer
to
theadditional
service
manual
{ARP.236-0}.
o Ce
manuel
d'instruction
serefdre
aumodeder6glage,
enfrangais.
o Estemanual
deserviciotratadelmdtodo
deaiusteescritoenespafrol.
CONTENTS
r. sPEcrFrcATtoNS
... .......
2. FRONT PANELFACILITIES
. . .
3. D|SASSE|\,BLY
. . . . . . . . . .
4. PARTS
LOCATION
......
5. BLOCKDIAGRAM
6. CIRCUIT
DESCRIPTIONS.
.
7. EXPLODEDVIEWS
. . . . . .
8. PACKING
2
5
I
17
9. P.C. BOARDS
CONNECTION
DIAGRAM
10. SCHEMATIC
DIAGRAM
11. ELECTRICAL
PARTS
LIST
12. ADJUSTMENT
.....
REGLAGE
AJUSTE.
30
33
40
PIGINEEFI ELECTFICINIC CCIFIPG,FIATION a r, Mesu.o 1 chome. Mesu.o-ku. rokyo1s3, Japa.
PIC,NEEFI ELECTFIONICA IUBAI lNC. 1925 E. Oominguez Sr., Lons Beach. Catironnia gOE.1O Ll.S.A.
PIC'NEEFI ELECYFICINIC [EUFICIPEI N.v. Keetbe.glaan T,2740 Beve.en. Bets,um
PfONEEFf ELECTFIG|NIC3 AUAYFALIA PTY. LTEI. 17a 1a4 Bounda.y Fload, E.6es de. V cto.,a 31s5, Ausr.aha
YH O \OV. 1982 Printed
ldDdn
Type Voltag, Remark
HE 22OV and 24Ov (Switchable) Europe model
HB 22Ov and 24OV {Switchable} United Kingdom model
D12OV,22OV
and24OV
(Swatchable) Generalexport model

1.
SPECIFICATIONS
Systems Compactcassette,2-channel
stereo
Heads........
"HardPermalloy"
recording/playback
headx 1
"Ferrite" erasing head
x 1
Motor........... DCservo
motor
x1
WowandFlutter
................
No
mor€than
0.05%
(WRMS)
Nomorethan
+
0.17%
(DlN)
Fast
windingTime...Approximately
110seconds
(C-60
tape)
FrequencyResponse
-20 dB recording:
Normal
tape ........
4O
to15,000Hz
+3
dB
(30
to 16,000
Hz)
Chrometape .......40to15,000H2+3dB
(30
to 16,000Hz)
Metaltape 40to 15.000
Hz
+ 3dB
(30
to 16,500Hz)
Signal-to-NoiseRatio
DolbyNR
OFF
............. More
than
57dB
NoiseReduction
Effect
DolbyNR
ON
.....................
More
than
10dB
(at
5
kHz)
Harmonic
Distortion No
morethan
1.0olo
(0
dB)
Input
(Sensitivity/Maximum
allowable
input/lmpedance)
LINE
(INPUT) 63
mV/25
V/50ka
Output
(Reference
level/Load
impedance)
LINE
(OUTPUT)
.................. 450mV/50
ka
Subfunctions
r DolbyNRsystem
(ON/OFF)
Btype
. 3 position
tapeselector
(NORM/CrOr/METALI
o Air damp
ejectfunction
o Full
automatic
stoD
function
o RECmuting
function
o Music
search
function
r Timer
stand-byfunction
. One-touchrecordingfunction
o Operating
modeindicator
(POWER,
REC,PAUSE)
o A.L.C(Automatic
LevelControl)recordingfunction
o lC-based
full logic control
Miscellaneous
PowerRequirements.............
AC220V
/
24 V(switchable)
50/60Hz
Power
Consumotion............ ........
30watts
Dimensions .320(W)x99.5(Hlx200(D)mm
12-5l8
(W)
x
3-15/16
(H)
x7-7l8
(Dl
in
Weight
(without
package) .3.6kg
(7
lb15oz)
SuppliedParts
Operating
instructions ...........................
1
Connectioncordwith
pinplug .................
2
NOTES:
Specifications and the design subject to possible
modificationswithout notice due to improvements.
NOTES:
1. ReferenceTapes:
Normal6 LH:DIN44513/BLATT6
orequiv.
CrOr
DIN455'13/BLATTT
(CrO2)
orequiv.
2. ReferenceRecording
Level:
-7 dBv levelat line out
(160
nwb/m magnetic
level
: Philipscassette
reference
levell
3. ReferenceSignal:333
Hz
4.
E
Wow I Flutter: o JIS [3 kHz, with acoustic compensa-
tion (weighted) rms valuel; DIN t3,150 Hz. with
acoustic compensation (weighted) PEAK value DIN
45507
Frequency Response: o Measured at - 20 dB level,
DOLBY NR OFF, leveldeviation
is +6 dB without in-
dication.
Signalto Noise
Ratio:
o Measured
atthe thirdharmonic
distortion 3o/o
level, weighted (DlN 455.|3/BLATTT).
Sensitivity: Input level (mV) required for reference
recording level with input (REC) level controls set to
maximum.
Maximum Allowable Input: While decreasing
settings
of input (REC) level controls and increasing
level
at
input lacks, this isthe maximum input level(mVl at
the point where recording
amplifier output waveform
becomesclipped.
Reference
Output Level:
-7 dBv level
at line out during
playback.
Thismodel
doesnot employ
a recording/playback
con-
nector(DlN-type).
o PowER
SWTTCH
When
this
switchis
depressed,thepower
isturnedonand
the OPERATIONMODEindicator
(POWER-l lights.
Depressthe
switchagainto release
itwhenturning
offthe
power
to thedeck.
r Themuting
circuitis
actuated
after
thePOWER
sivitch
hasbeen
setto ONandthere
will be no operation
for
about4 seconds.Thisisnotfailureor malfunction.
. When the POWER
switch is set to the OFFposition
whilethetape
deckisoperating,the
deck'soperationis
released
andthestopmodeisestablished.
€) EJECT
BUTTON
Depressthisbuttonto openthecassetteholder.To close
thecassetteholder,
push
thetop back
untilit locks.
Do not press thisbuttonwhenthetaoe
isin motion.
O) TAPE
COUNTER
Thiscounter
showstheposition
of thetape
usingathree-
digitmeter.
O) COUNTERRESET
BUTTON
Depressthis
buttonto resetthetape
counter
displayto000.
o oPERATTNG
MODE
TNDTCATORS
REC: This lights
whentheREC
switch
(o)
is
pressed.
POWER: Thislights
whenthePOWER
switch
is
pressed.
PAUSE: This lights
whenthePAUSE
switch
( I I ) is
Dressed,
G) TAPE
SELECTOR
SWTTCHES
Thisselector
allows
the
bias
andequalizercharacteristicsto
beselectedduringrecording
andequalizercharacteristics
during
playback
inline
withthetype
of tape
youareusing.
NORMAL:Fornormaltapes
CrOr: For
chrome
tapes
METAL: Formetaltapes
7.
8.
10

2.FRONT PANELFACILITIES
o TTMER
START
SWTTCH
This switch is used when an optionalaudio timer is
employed
for unattened
recording
or wake-up_ playback
operations.
Keepthis
switch
at theOFF
position
whenthe
timer
isnot being
used.
REC: Set to this position to set the tape deck
automatically
to the recording
mode at the
time
preset
ontheaudiotimer
andto start
the
recordingof programsunattended,
for in_
stance.
OFF: For when the timer is not being used.
PLAY: Set to this position to set the taoe deck
automatically
to the
playback
mode
atthe
time
preseton the audio timer and to start the
playback.
The tapeplayback
function
canoe
usedto wake-up
in the morning
instead
of an
alarm
clock.
o) MUS|C
SEARCH
SWTTCH
Use this switch when playing a tape with music recorded
on it to quickly locate the beginning of songs separatedby
a non-recorded section of over 4 seconds duration. ln the
fast-forward mode or rewind mode. when this switch isset
to ON, tape travel will stop in the non-recorded area bet-
ween songs and the unit is automatically set to the
playback
mode. This is a handy function for locating
the
program.
o REC
SWTTCH
Depressthis switch to start tape recording. This switch will
not work when a cassetteis not loadedor when the erasure
prevention tabs of a loaded cassettehave been broken off.
When this switch is depressed to the ON position, the
OPERATIONMODE indicator
(RECo)will be iiluminated.
@ PAUSE
SWTTCH
Depressthis
switch
to stop thetapetravel
temporarilydur-
ing recording
or playback. Depressthis switch again to
allow
the tapeto continueto travel.When thisswitchis
depressed
to theON position,
theOPERATIONMODE in-
dicator
(PAUSE
I I )willbeilluminat€d.
. Thetape
does
not stopduringfast forwardor rewind
oo€rationsevenwhenthe PAUSE
switch
isdeoressed.
o REC
MUTE
SWTTCH
Depressing
thisswitchduringrecording
makesit possible
to create
anunrecorded
blank
onthe cassette
tape
onlyfor
the timeduringwhich the switchis keptdepressed.
This
switchisusedfor providing
blanks
of the required
length
between
programs
and
editingtapes
sothatthey
are
easier
to listen
to andfor creatingthe unrecorded
blanks
which
arerequired
for
operatingthe
MUSIC
SEARCHfacility.
. Nosignalis
recorded
whenthe
switchistouched
during
recording.
Donottouch
theswitchunless
necessarv.
(D *DOLBY
NRSWTTCH
Depressthis switchto ONfor recording
with the built-in
Dolby
NoiseReduction
system
andfor playback
of tapes
which have
beenrecorded
usingthe Dolby
NoiseReduc-
tionsystem.
Forothertapes,
do notpress this
switch.
*The word "Dolby" and 00 are trademarks
of Dolby
Laboratories
Licensing
Corporation.
NoiseReduction
System
manufactured
underlicense
from
DolbyLaboratories
Licensing
Corporation.
@ oPERATING
SWTTCHES
REW(<<l: Depressthisswitchto rewindthe tape
at
high
speed
(The
tape
willrravel
from right
to left).
FF
(>>l: Depress
this switchto send
the taoe
for-
ward at high speed
(Thetape will travel
fromleftto rightl.
STOP(tl: Depressthis
switchto stopthetapetravel
andto release theoperating
switches.
PLAY(>l: Depressthis
switch
to start
tape
playback.
(0 ProNc@

3.DISASSEMBLY
. Tape
transport
unit
Remove
the four screws
(E).
. Front panel assembly
Remove
the sixscrews
(D).
. Door assembly
1. Depress
the EJECT button and
openthe cassette
holdel.
2. Remove
the hooks (C).
3. Pullup the door assemblv
. Bottom plate
Remove the
two screws
(B).

4. PARTS LOCATION
FrontPanel
View
FrontPanelassembly
RX8-692
Ejectknob
RAC-281
RX8.693
Knob (POWER)
RAC.280
Standbyknob B-^
(TIMER)
RAC-294
Front View with Panel Removed
Tapecounter
RAW-189
LED
(LED4O1,
REC}
PR5524S
Cassette
plate
RAH.433
* Erasehead
RP8-096
(
R
P8-085)
** REC/PBhead
RPB.O89
** Pinch
armassembly
RX
B-720
t* Slideswitch
{S4O9.
TIMER)
RSH-064
NO?ES:
c Partsutithout part number cannot besupplied.
o The I marh found on some component parts indicates the importance of the
safety factor of the part. Therefore, when replacing, be sure to use partsof identical
designation.
o For your Parts Stoch Control, the fast mouing items are indicated with the marhs
** and *.
** GENERALLY MOT'"ES
FASTER THAN *.
This classification shallbe adjusted by eachdistributor because it depends on model
number, temperature,humidity, etc.
Knob B (TAPE
SELECTOR)
RAC-286
Knob
A (PAUSE, RECMUTE)
RAC-276
Bonnet ,-
RNA-592 |
I
I
** Door assembly I
l
'@l
KnobB (REC)
RAC-277
Knob
(PLAY,
FF,
REW,
STOP)
F.AC-282
Knob
A (DOLBY
NRI
RAC-285
Standbyknob
(MUSIC
SEARCH)
RAC-234
* LED ILED4O2,
POWER)
8G5524S
* LED
(LED4O3.
PAUSE)
BG55245
** Push
switch (S4O1-54071
RSG-143
Controlassembly
RWG-137
** Push
switch (5305)
RSG-144
** Push
switch
assembly
(s302-s304)
RSG-145
** Slide
switch (5408)
RSH-066
5

TopView
/\** Transistor
(o701)
25D1
265
r\ ** Transistor
(o801
)
25D1265
1\** Fuse
(FU1,
T8O0mA)
REK-O64
A * Po*ur
transformer
12201240V],
RTT-293
*'t Motor assembly
RXM.O76
A tt Plrng"t
solenoid
R
RXP-127
(R
XP-131
)
f'1
* Plunger
solenoid
F
RXP.126
(RXP-130)
i\ ** eusn
switch
(S301)
RSA-060
RearPanel
View
[ ** Line voltage selector
RSX-045
* Variable
resistor
(lNPUT}
RCV-106
Terminal4-P
(l
NPUT/OUTPUT)
RKB.O2O
Variableresistor
RCV-106 (
I
NPUT}
-
Mainassembly
RWX.631
Side
assembly
RWX-643
t
"d#lY1-:-""-_*
** Push
switch (5305)
RSG-144
t* Push
switchassembly
(s302-s304)
RSG.145
Strain
relief
REC-396
f AC power cord
RDG-O36
(for HE type)
RDG-049 (for HB type)
- -
-
6-

E15.BLOCK DIAGRAM
RECORDING
gIAS OSCILLATOR
3
2
B
REC/PB SWICHES FLAT AMPLIFIER
[.--,.*l i...
I i:+r
I +--rt_jr +.
i'--q I
I h l::r'f
?Y]
.-|.
tm
LINEOUTPUTMUTEGATE
*-LadB-
DOLBY NOIS
I o5os
P.-.
HREc>
NORM
: 42l.7mV
CrOz
: 489.8mv
METALT
69t.8mV
RECOROING
AMP.
TAPE SELECTOR SWITCHES
D
3
2
1
-l' I

65
4
CONTROLCIRCUIT
PLAY
-o o--1
FF I
{H
REw I
-o5
sToP I
-on I
m
I
PAUSE I
.H I
m
AL IN
MUTE
BIAS OSC, PAJSE
PATJSE
FF SOL. MS
REW SOL.
PrN
cHsoL. IlXrtSr,
MS SOL.
aT
ENO PULSE RECMUTE
LINE MUTE
-
-
-
TION CIRCUIT
tc301
RECORDING
AMP.
POWER
SUPPLY
CIRCUIT
POWERIND,
6
5
4

6.
CIRCUIT DESCRIPTIONS
6.1 OUTLINE
OF MAIN
STAGE
PlaybackEqualizer
Circuit
TheEQamplifieremploys
2-stagedirect-coupled
amplifier, ild the NFB circuit is designed for
playback equalizationwith normal (NORM) tapes.
For playback equalization with chrome (CrO2
)
and metal (METAL) tapes, the transistor switch
is turned on to incorporate the RC network in the
output circuit of the EQ amplifier.
Dolby Noise
Reduction
System
The CT-X5 features the B-type Dolby noise
reduction system (where the S/N ratio is improved
by up to 10dB above SkHz) incorporated in a
Dolby IC (HA1L226).
Recording
Amplifier
The recording amplifier uses a single transistor
and has a high frequency peaking circuit in the
emitter, and a trap in the output circuit to prevent
leakage of the recording bias signal. The peaking
response of the high frequency equalization cir-
cuit can be changed to give three different re-
sponses
by the TAPE SELECT switchesfor dif-
ferent types of tape (NORM, CrO, and METAL).
Further, during playback, both the input and
output circuits of this amplifier a^re
grounded.
BiasOscillator
This push-pull oscillator circuit supplies the
eraseheadwith the erase
current, and the recording
head with the recording bias current. The dif-
ferent recording bias levelsfor the different types
of tape (NORM, CrO2 and METAL) are switched
by changing the oscillator power supply voltage
which in turn varies
the oscillating power.
6.2 CONTROLCIRCUIT
The control circuit in this deck utilizes a one-
chip IC (PM9002B) which enablesfeather-touch
operations. In addition to mechanism control,
this IC alsoincludesmusic search (MS),auto-stop,
and timer start functions. And due to the digital
counter frequency divider system employed in
timing settings for the mechanism control, all
operational timing discrepancies
have been elimi-
nated. The PM9002B pin layout is shown in
Fig. 6-1, the functional block diagramin Fig. 6-2,
and the output pin time charts during different
modes in Figs. 6-3 and 6-4. For interrelations
between circuits, seethe block diagram on page
7.
Operations
duringEachMode
The mechanical operations effected by the
following circuit changes
are describedin the next
chapter(seepage 14).
"..J
''"t'
vcc
pltrse
a-E-
OFF O
erav
f
l,
ENO
PULSE
REC
PLAY
srop
n-e
w
M5
TIM
ING
SENSE
TIM
ING
NOISE
FIL
SIGNAL
IN
GND
NOISE
FILTERx
itw-
si6F
FrIV
TEC
FAUSE
AR
LTimanO
clck OSC
&
divrdcr
Fig.6-2 PM9002B
internal
block
diagram
Fig.6-1 PM9002B
pin
layout

Normal ooeration
PLAY STOP FF STOP REW STOP REC,/PAUSE
PAUSE STOP REC STOP PAUSE PAUSE PLAY PAUSE
LINE I'UTE
( Pin 27)
RECMUT€
( Pin
28)
PINCH
SOL
( Pin 24)
FF SOL.
( Pin 2O)
R€W SOL.
( Pin 25)
MS SOL.
( Pin 23 1
Normal operation MSSW:ON
Fig.6-3 PM9002Btimechart
(When
MS
switch
is
OFF)
Dir&t change
STOP R€W FF STOP PLAY STOP REC STOP REC FF REC PAUSE
LINE
MUT€
( Pin 271
REC
MUTE
( Pin 28)
ErAS
OSC
( Pin 22)
PINCH SOL.
{ Pin 29)
FF SOL.
( Pin 26)
REW SOL.
( Pin 25 I
MS SOL.
{ Pin 23}
PAUSE
Pin 2l
)
'1
0
Fig.
6-4 PM9002Btimechart
(When
MS
switch
isON)

1.When
the POWER
Switch is
Switched
ON
Then the POWERswitch is switchedon, * bV is
applied to pin 1 (Vcc) of IC401. During the initial
period when pin 1 voltage is being increasedfrom
0V to 5V (approximately from 0.6V to 2.4V) the
IC's internal reset circuit is activated, putting the
IC into stop status which is maintained for about
four seconds.During this time, Do changecan be
effected by pressing any of the other operation
control buttons.
2. PlaylVlode
When the PLAY button is pressed,
the level of
pin 5 (PIEY) of IC401 is switched to ,,L,, level,
and the level of pin 24 (PINCH SOL) to ..H"
level. Q503 is turned on and the pinch roller
activated. In addition, IC401 pin 27 (LINE
MUTE) is opened 416ms after the PLAy button
is pressed, thereby releasingthe line mute status
to enable play mode operations to commence.
ALTNE
g/OUTPUT
Fig.
6-5 PLAY mode
operation
3. Recording
Mode
When a cassette
half with its erasure
prevention
tabs intact is loaded in the deck, pin B (AR) of
IC4OL is switched to ('H" level, thereby enabling
the deckto beswitchedto recording
mode.
When the REC button is pressed,
IC401 pin 4
tnEel is changed to "L" level. PitjlO (REC) is
also changedto "L" while pin l-g (REC) is open.
As a result, the REC indicator lights up and the
reed relay (RY501) is switched off, therebyT
7
switching the signal path to the recording circuit.
And the IC401 pin 24 (PINCH SOL) changed
to
'6H" level, tape transport is commenced. pin 22
(BIAS OSC) is opened 52ms
after the RECbutton
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.
PINCH
SOL.
+12vA)
LINE
INPUT 'H'ACTVE
B|AS
OSC.
PINCH
PLAY SOL.,
-'l--------{1
LINE
MUTE
Llct6msl-
(oPEN)
RTE
(GNO)
REC
fi-0-
CASSETTE
HAtf
WITH
E.P TABS
IS LOADEO
PUSH
UP
HEAO BASE
AAIOPINCH
ROLLER
Fn prNcH
SOL.
z
ie;ri5
bsc.
r-152m# - -
I
r44,t6
rnsf--
I REC
MUTE
I
I r-rrueuure
)-lqe.n,t!, -
nEi
t
| ^-^
L------rREC
REC/P
B.
HEAD
TO
OPEN
('H' LEVEL)
Fig.
6-6 RECmode
operation
H'ACTIVE
.\LINE
g/UJTPUT

4. Fast ForwardMode
When the FF button is pressedIC401 pin 8
(TD is changed to "L" level, followed by pin
26 (FF SOL) being changed
to "H" level 416ms
later. Q50L is thus turned on, activating the FF
solenoidto start fast forward operation.
Fig.
6-7 FF modeoperation
5. RewindMode
When the REW button is pressed,IC401 pin
7 (RE-W) is changedto "L" level, followed by pin
25 (REW SOL) beingchanged
to "H" level416ms
later. Q502 is thus turned on, activating the REW
solenoidto steut rewind operation.
+lx
;
lights up. And since pin 27 (LINE MUTE) of
this IC is changedto ('H" level, the signalcircuit is
muted. If the REC and PAUSE buttons are both
pressed,
IC401 pin 20 tnEel and pin Zf IFAUSE-)
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 ts opened,permitting output
of the signal to LINE OUTPUT, but since
pin 28
has been changed to 66H"level, recording mute
mode is maintained.
q
pause
$lX
BUrroN x
Fis.6-9 PAUSE
mode
operation
. PLAY-PLAY MUSE
tc4o4
REW
BUTTON
f.frqp"t-
+,;
E0Y?5*or
REc +
BUTTON
Fig.6-10
PLAYPAUSE
mode
operation
Fig.
6-8 REWmode operation
6. Pause Mode
The pause mode in this deck is released by
pressing
the PAUSE button. The pause mode is
not releasedby pressingthe PLAY button during
play/pause mode, or the REC button during re-
cording/pause mode. Note, however, that pressing
the PLAY button during recording/pause mode
switchesthe deck to play/pausemode, and pressing
the REC button during play/pause mode switches
the deckto recording/pause
mode.
If the PAUSE button is pressed
during stop mode,
pin 2 (FAttSE) and pin 21 (PAUSE)of IC401 are
both changed
to "L" level,
thereby lighting up the
PAUSE indicator. When both the PLAY and
PAUSE buttons are pressed, IC401 pin 2L is
changedto '(L" level, and the PAUSE indicator
12
. STOP-REC PAUSE
r--r lC4O4
O5Ol: OFF(z146ms)-ON
REC MUTE
LINE MUTE
0502:OFF(4{6ms}
-ON
Fig.
6-11 REC PAUSE
mode
operation

7. MS
Operation
When the FF or REW button is pressed
with
the MS button ON, tape transport is stopped at the
blank portion of tape between tunes, and then
recommenced
in play mode. When the FF button
is pressed with the MS button ON, IC401 pin 24
(PINCH SOL) is changedto "H" Ievelfor 312ms.
The pinch solenoid is thereby activated and the
headbase
starts
to rise.
Pin 23 (MS SOL) of IC401
is changedto ((H" level260msafter the FF button
is pressed,
resulting in Q504 beingturned on and
the MS solenoid being activated. Following com-
pletion of the "power assist" operation, the head
base is thus moved to the MS position. The FF
solenoid is activated 416ms after the FF button is
pressed, resulting in fast forward tape travel.
During this action, a fast forward playback signal
is applied to pin L3 (SIGNAL IN) of IC401, and
if this signal is interrupted for about 84ms (cor-
responding to a portion of blank tape between
tunes) IC401 switches to playback mode auto-
matically. The above operation is much the same
when the REW button is pressedinstead of the
FF button.
8.Auto-stopMode
A photo-interrupter output is applied to pin
16 (END PULSE) of IC401 during tapetransport,
resulting in the capacitor connected to pin L7
(C408) being chargedup and dischargedrepeated-
ly. The potential at pin 17 is thus kept below the
threshold voltage, and prevents activation of the
auto-stop mechanism.
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 17 (C408) continuesto
increase until it exceeds the threshold voltage.
The IC is thus switched to stop mode, thereby
stoppingtapemechanisms.
Fig.
6-13 Tapetraveldetection
obl}$,,
Fig.
6-12 MS
operation
IOFF(416ms){fil
'-leiemsf ---{
; FF SOL.
L--------
I otN
:MS
; soL.
Q)1+zeo'*-
FFi
I
' L|NE
i.____-l'!u_r_q
iot.l
(32ms)
MUSIC
SEARCH
(CUE)

9.TimerStartOperation
Timer recording,timer playback and off modes
are attained by changing the potential of IC401
pin 18 (TIMER) to * Vcc, ground, and open
respectively.
When a cassette
tape with erasure
prevention tabs
intact isloaded,
andthe POWERswitch isswitched
ON with the TIMER switch(S409) in the TIMER
REC position, recording mode is started about
four seconds after the power comes on. If the
erasureprevention tabs have been removed, how-
ever,
the tapedeckremains
in stop mode.
If the POWER switch is switched ON with the
TIMER switch in the TIMER PLAY position,
playback mode is started about four seconds
after the power line voltage is established.
There is
no timer start operations when the TIMER switch
isleft in the OFF position.
. TIMER REC
t\,tc
REC
orr o
er-av
t
flr
TIMER
(s409)
CASSETTEHALF
WITH
E.P TABS
IS LOADED
Fig.
6-14 Timer
start
operation
TIMER
STANOBY
6.3 MECHANICALOPERATIONS
Playback
Mode
The CT-X5 makes use of the capstan torque
when shifting the headbase
during playback mode.
(Both the recording/playback and erase
headsare
mounted on the head
base).
o StopMode
(see
Fig.6-151
The head base shift mechanism during stop
mode is shown in Fig. 6-15. Operating lever (A)
presses
down towards cam (C) due to operating
leverspring(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 return 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.
14
Gear
lever
return
spring
(E) Flywheel
Operating
lever
(A
Solenor=E"liOperating
leveiS[ring
(Bl Hebd
base
drive
pin
Cam
gear
(D)
Gearlever
(F)
Capstan
gear
ilffi
Fig.
6-15 STOPoperation

Switch to Playback Mode from Stop Mode
(see
Fig.6-16)
1. Solenoid P is activated O , ffid the hook of
gear
lever
(F) isreleasedfrom stopper(G) O .
2. Operatinglever (A) ispressed
down onto cam
(C) by operating lever spring (B) O , carn
gear(D) rotates @ and engages
capstan
gear
(H)
o
Solenoid
P '"' lE
Fig.6-16
STOP
-+ PLAY
operation
1
Switchto Playback
Mode
from StopMode
(see
Fig.6-17)
3. Cam gear (H) continues rotating due to
capstan gear (H) @ , ffid cam (C) pushes
operating lever (A) up O
4. After cam (C) pasises
the point of maximum
lift, cam gear (D) disengages capstan gear
(H) @
- (D)
Fig.6-17
STOP
-+
PLAY
operation
2
o Switch
toPlayback Modefrom
StopMode
(see
Fig.6-18)
5.Operating lever spring (B) forces operating
lever (A) to press against cam (C) Q) ,
thereby tending to continue the rotationary
motion of cam gear (D), but since stopper
(G) catchesthe arm of gear lever (F) (E ,
cam gear (D) stops rotating and operating
lever (A) becomes stationary (playback
mode).
(B)
Fig.
6-18
STOP
-+
PLAY
operation
3
o Operation
of DifferentParts
As can be seen in Fig. 6-18, the head base
drive pin of operating lever (A) risesduring play-
back mode. This pin forces the head base up
through the action of the HB drive spring. The
pinch compressor spring is also lifted at the same
time, forcing the pinch roller into close contact
with the capstan. Furthermore, the brake plate is
lifted to releasethe reel brake. Pressureis 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.6-19).
Drive
gear
TU reelbase
TUidler
Fis.6-19
Generationof take-uptorque

Switch
toStop
Mode
from
PlaybackMode
(see
Fig.6-20)
1. When solenoid P is deactivated O , the arm
of gearlever (F) is disconnectedfrom stopper
(G) bV the action of gearlever retum spring
(E) (D
2. Operating lever spring (B) forces operating
lever (A) against cam (C) (D , resulting in
rotation of cam gear (D) @ and lowering
of the headbasedrive pin @
3. Stopper (G) catchesthe hook of gear lever
(F), stopping the mechanism in the condition
shown
in Fig.6-15(stop
mode).
(B)
Fig.
6-20
PLAY
+ STOP
operation
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 g€il, resulting in rotation of the
TU reel base
asshown in Fig. 6-2L (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 releasingthe
reelbrake.
Brakeshoe
Drive
gear
TU reel
base
Brake
plate
Drivearm Drivearm
bracket
pin
Rewind
Operation
When solenoid R is activated (see Fig.6-22'1,
the drive arm is moved to the left, and the drive
gearon the arm engages
the supply reel gear result-
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 releasing
the reel brake.
Brake
shoe
Solenoid
RBrake
shoe
Supply
reel
base
Drive
gear
Brake
plate Drive
arm
Fig.
6-22
Rewind
operation
MS
Operation
(Music
Search)
MS operation involves combination with fast
forward and rewind operations similar to cue and
review operations. At the beginning of MS opera-
tion, po\Meris applied to solenoid P, resulting in
the playback operationoutlined in Figs.
6-16, 6-17
and 6-18 being effected in very short period of
time, the head basebeinglifted by capstan
torque.
During this period, power is also supplied to the
PMS solenoid. Although solenoid P is soon re-
leased,the PMS solenoid maintains the head base
through the stopper lever. Since this PMSsolenoid
is.designed to maintain only the head base,the
pinch roller and TU idler are released. This is
followed by power also being supplied to solenoid
F or solenoid R, resulting in cue or review opera-
tion respectively.
Note: If MS operation is started after fast forward or
rewind mode has already started, solenoid F or
solenoid R is released temporarily, and reactiuated
after a brief period of playback mode (mechanically
speahing).
-
Brake
plate
Brake
plate Solenoid
F
Fig.6-21 Fastforward
operation
-

2
T.EXPLODED
VIEWS
A
B
C
D
1
..aa''
2t--€_-A
-/
20' 22
I
T
T
./
\..-2' 6//
-l 17 L

65
4
A
&:"
B
C
D
6
5
4
l
\

Parts
Listof Exploded
View
Mark No. Part No.
NO?ES:
o Parts
without part number cannot besupplied.
o The I marh 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 *.
** GENERALLY MOVES f'AS?EA THAN T.
This classification shall be adjusted by eachdistributor because
it dependson model
number, temperature,
humidity, etc.
Description Mark No. Part No. Description
**
A*
**
a**
1. RNA-592
2. BBZ3OPOSOFMC
3. RAH433
4. RX8-693
5. RX8-692
6. RAC-282
7. RAC-277
8. RAC-276
9. REK-o@I
10. RWX-631
11. RAC-280
12. VBZ40P060FMC
13. RTT-293
14. BBZ30P080FZK
15. RE8-240
16. RAW-189
17. vBZ26PO60FMC
18. RAC-281
19. RWG-137
20. RAC-234
21. RAC-294
22. RAC-286
23. RAC-285
24. RSXO4s
25. REC-355
Bonnet
Screw
Cassette
plate
Door assembly
Front panel
assembly
Knob (CONTROL)
Knob B
KnobA
Fuse
(T800mA)
Mainassembly
Knob (POWER)
Screw
Power
transf
ormer l22O|
24OY
I
Screw
Sensingbelt
Tape counter
Screw
Ejectknob
Control assembly
Standby knob
Standby knob B
Knob B
Knob
A
Line
voltage
selector
Slidingstopper
AC power cord (for HE type)
AC powercord (for HB
type)
Strain
relief
Sideassembly
Foot assembly
Connectorassembly
6-P
Front panel
Mask
Indicator
panel
Connector
assembly7-P
P.C.
board
spacer
Counter
holder
Sensor
assembly
Eject
plate
Transistor
assemblyB
Transistor
assembly
A
61.
62.
63.
64.
b5.
66.
67.
68.
69. See
pp.20-23.
Heatsink
Holder
Chass
is
Panel
stay
Bottom plate
Connector2-P
Cush
ion
Connector 5-P
Tape
transportmechanism
A
A
26.
27-1. RDG-036
27-2. RDG-049
24. REC-396
29. RWX-il3
30. REC-369
31.
51.
52.
53.
54.
55.
56.
57.
58.
59.
60.
RKP.663
19

Parts
Listof TapetransportMechanism
Mark No. Part
No.
NO?ES:
o Parts
without part number cannot be supplied.
c The $, marh found on some component parts indicates the importance of the
safety factor of the part. Therefore, when replacing, be sure to use partsof identicat
designation.
c For your Parts Stoch Control, the fast mouing items are indicated with the marks
t* and *.
** GENERALLY MOWS FASTER THAN *.
This classification shallbe adjusted by eachdistributor because it depends on model
number, temperature, humidity, etc.
Description Mark No. Part No. Description
A
1. YE3OFUC
2. RBH-949
3. RBH-951
4. YS3OFBT
5. vcz26P090FMC
6. RN
L-261
7. REB447
8. RNL-534
9. RBK-175
10. RN
L-525
11. ATZ26P080FMC
12. RBH-948
13. RN
L-529
14. PMZ26P100FMC
** 15. RSH-Os8
16. VCZ26P060FMC
17. RNH-219
18. RN
L-524
19. RBH-778
20. YE4OFUC
21. RBH€65
22. REB416
23. RN L-527
24. RXB-716
25. R
BF-050
26. RBH-794
* 21. RPB{96
(RPB-085)
** 28. RPB-089
29. RBH-723
30. RNL-5)3
31. PMZ20P1
50FMC
32. rMZ20Y150FMC
33. RNF-989
34. RKP-663
* 35. RXP-127
(RXP-l31
)
36. RNL{47
37. PMZ26PO6OFMC
38. PMZ26P030FMC
* 39. RXP-126
(RXP-l30)
40. RBH-722
41
. RNL-051
* 42. RXP-125
(RXP-1291
** 43. RXB-720
WasherE-type
Ejectlever
spring
Eiect
spring
Washer
CS-type
Screw
Cylinder
O ring
Piston
Pocketspring
Pocket
Screw
Lock lever spring
Detector lever
Screw
Slideswitch
Screw
Halfspring
Half
holder
Returnspring
WasherE-type
HB returnspring
Shaft stopper
Reference
pin
Metal holder assembly
Oil stopwasher
HBdrive
spring
Erasehead
REC/PBhead
Head
adjustspring
Subhead base
Screw
Screw
Spacer
(for height
adj.)
Connectorassembly
6-P
Plunger
solenoid
R
Solenoid
arm
Screw
Screw
Plunger
solenoid
F
Gearlever
returnspring
Gearlever
Plunger
solenoidP
Pinch
arm assembly
44. RBH€90
45. YE2OFUC
** 46. REB446
47. RX8-376
48. RBH-725
49. RXB-721
50. RBH-727
51. YS2OFBT
52. REB-187
53. RNK-998
54. WA21D040D025
55. WA17D032D025
56. RXB-714
57. RXB-715
58. RNL-059
59. RXB-723
60. RBH-842
61. RXB-374
62. RBH-724
63. RNK-999
** 64. RXM-076
65. PM426PO4OFMC
66. RXB-717
** 67. REB483
68.
69. RNE-513
70. RBH-952
71. RBAO70
A * 72. RXP-128
73. RLB-390
101.
102.
103.
104.
105.
1
06.
't07.
108.
109.
110.
111.
112.
113.
114.
1
15.
1
16.
Pinch
pressure
spring
WasherE-type
Drivebelt
Drivearm full assembly
FRspring
Reel
base
assembly
Brakespring
Washer
CS-type
Brakeshoe
ldlergear
Washer
Washer
Supply reel baseassembly
TU reel baseassembly
Cam gear
Leverassembly
Leverspring
ldler arm assembly
ldler pressure spring
TU idler
Motor assembly
Screw
Flywheel
assembly
Capstanbelt
Cordclamper
Eject
plate
spring
Steppedscrew
Plunger
solenoid
PMS
Collar
Eiect
plate
Eject lever
Pocket frame
Lock lever
Side
plate L assembly
Head base
Connectorassembly2-P
Solenoid
bracketR
SolenoidbracketF
Chassisassembly
PMS
plate
Brake
plate
Flywheelholder
Thrust holder
Side
plate
R
Stopperlever
A
A
eo