AKA AC-400 User manual

AKAi SERVICE fflADUAL
0 0
AC-400
co
0
AC-405K
MINI COMPONENT SYSTEM
AC-400/AC-405K
SR-400

CONTENTS
[AC-400 / AC-4051<]
SAFETY INSTRUCTIONS .............................................................................................................................. 4
INFORMATIONS .................................................................................................................................................... 5
SPECIFICATIONS ................................................................................................................................................. 6
I. DISASSEMBLY ................................................................................................................................................ 8
II. PRINCIPAL PARTS LOCATIONS .................................................................................................... 9
III. REPLACEMENT OF PRINCIPAL MECHANICAL PARTS ...................................... 11
IV. ADJUSTMENT ............................................................................................................................................. 15
V. PARTS LIST .................................................................................................................................................... 19
VI. WIRING DIAGRAM .................................................................................................................................. 33
VII. BLOCK DIAGRAM ................................................................................................................................. 34
VIII. SCHEMATIC DIAGRAM .................................................................................................................. 38
IX. PCB LAYOUT ................................................................................................................................................ 45
X. INFORMATION OF ICs Ml-COM ................................................................................................ 51
ABBREVIATIONS .............................................................................................................................................. 60
[SR-400]
SPECIFICATIONS ............................................................................................................................................. 64
SCHEMATIC DIAGRAM .............................................................................................................................. 64
PARTS LIST ............................................................................................................................................................. 65
3

SAFETY INSTRUCTIONS
PRECAUTIONS DURING SERVICING
1. Parts indentified by the A (*)symbol parts are critical for
safety. Replace them only with parts whose numbers are
specified.
2. In addition to safety, other parts and assemblies are
specified for conformance with such regulations as
those applying to spurious radiation.
These must also be replaced only with specified replace-
ments.
Examples:RF converters, tuner units, antenna selection
switches, RF cables, noise-blocking capacitor~, noise-
blocking filters, etc.
3. Use specified internal wiring. Note especially:
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
4. Use specified insulating materials for hazardous live
parts. Note especially:
1) Insulating Tape
2) PVC tubing
3) Spacers(insulating barriers)
4) Insulating sheets for transistors
5) Plastic screws for fixing micro switches
5. When replacing AC primary side components (trans-
formers, power cords, noise blocking capacitors, etc.),
wrap ends of wires securely about the terminals before
soldering.
~
6. Make sure that wires do not contact heat generating
parts {heat sinks, oxide metal film resistors, fusible resis-
tors, etc.).
7. Check if replaced wires do not contact sharply edged or
pointed parts.
8. Also check areas surrounding repaired parts.
9. Make sure that foreign objects (screws, solder droplets,
etc,) do not remain inside the set.
MAKE YOUR CONTRIBUTION TO PROTECT
THE ENVIRONMENT
Used batteries with the ISO symbol for recy- ~
cling as well as small accumulators (recharge- TI ~\)
able batteries), mini-batteries (cells) and starter 'O <:;:,
batteries should not be thrown into the garbage can.
Please leave them at an appropriate depot. All other house-
hold batteries can be thrown out with the household waste.
SAFETY CHECK AFTER SERVICING
After servicing, make measurements of leakage-current or
resistance in order to check if exposed parts are accept-
ably
insulated from the supply circuit.
The leakage-current measurement should be done between
accessible metal parts (such as chassis, ground terminal,
microphone jacks, signal input/output connectors, etc.) and
the earth ground through a resister of 1500 ohms paralleled
with a 0.15µF capacitor, under the unit's normal working
condition.
4
The leakage-current should be less than 0.5mA r ms AC.
The resistance measurement should be done between
accesible exposed metal parts and power cord plug prongs
with the power switch "ON"(if included). The resistance
should be more than 2.2Mohms.
PRECAUTIONS IN REPAIRING
When repairing or adjusting the unit, please note the follow-
ing points.
1. Do not put excessive pressure on the mechanical part
(operation part), including the pick-up block, as extremely
high mechanical precision is required in these parts.
2. When the base is removed for repair or adjustment,
make sure that there are no metal objects between the
P.C board or the mecha parts and the base.
3. The Micro-Computer and the CD signal processing ICs
may be damaged by static electricity or leakage from a
soldering iron during repairing. While soldering, please
take the precautions against leakage as in the illustra-
tion.
, GND
4. Do not loosen any screws in the pick-up block.
Please refer to NOTE when replacing the pick up block.
5. To avoid hazardous invisible Laser Radiation, DO NOT
look at the Laser Beam (Objective lens) directly.
6. On models for some countries, laser warning labels are
affixed on and inside of the unit, as shown below.
For your safety,
read these labels carefully before
repairing or adjusting the unit.
CAUTION
The use of controls or adjustments or the performance of
procedures other than those specified herein may result in
hazardous radiation.
[EUROPE, SCANDINAVIA, UK and AUSTRALIA]
CLASS 1 LASER PRODUCT
KLASSE 1 LASER PRDDUKT
LUOKAN 1 LASER LAITE
KLASS 1 LASER APPARAT
Label affixed on the rear panel of the unit
CAUTION: INVJSllk.ElASERIWMTIONWHEN°"=N
ANO tNnAl.00(S DEFEATED AVOID EXPOIUM: TO 8EAM
AOVARSEL : USYNUG LASERSTRAUNO VED .....
HINl KA.A SIKKEAHED6AFWIYOEAI: EA UOE I# fUNKT10N
uNDG,i UD&IIIETTELSE FOA STAAI..ING
VARO : AVATTAESSA JA SUOJAL.UklTUS OHfTET-
TAESSA Olfl ALTTNNA NAKYMATTOIMlLE I.MIERSATE~
LYLEE
ALA KATSO SATEESEEN 1
VARNING ;()SYNI.IO LASERSTAAl.MNG MAR DENNA
DEL AA 0PPNAO OCH SPAAAEN AA UAKOPf'lAO
BETANClA EJ STRALEN'
Label affixed on the CD MECHA chassis

INFORMATIONS
SYMBOLS FOR PRIMARY DESTINATION
Alphabet indicates the destination of the units as listed
below.
Symbol Prinncipal Destination
[Kl USA
[[] UK
rn
Europe(except, UK)
rn
Australia
[y]
Germany
[[]
Universal
IY*I
Custom version
VOLTAGE CONVERSION ( IY] [Y] Model only)
Before connecting the power cord, set the VOLTAGE
SELECTOR located on the rear panel of the AC-400/AC-
405K so that the correct voltage for your area
is indicated.
220-230V 240V
110V
[U, Y]
5

SPECIFICATIONS
[AMPLIFIER Section]
Power output ....................................................................................................................................... 30W +30W(6 ohm, 1 KHz, 10% THD, EIAJ)
25W + 25W(6 ohm, 1 KHz, 1% THD, DIN)
Total harmonic distortion ........................................................................................................................................................ 0.05%(-10dB for RMS)
Input sensitivity
AUX ..................................................................................................................................................................................................... 400mV/47K ohms
S/N ratio
AUX ............................................................................................................................................................................................................................... 70d8
Channel separation ........................................................................................................................................................................................................ 55d8
[Deck Section]
Track system ........................................................................................................................................................................... 4 track, 2 channel system
Frequency response ......................................................................................................................................... 100-12,SOOHz ± 3dB(Normal tape)
100-12,SOOHz ± 3dB(Cr02 tape)
Wow & Flutter ................................................................................................................................................................................................... 0.2%(WRMS)
S/N ratio(CCIR/ARM) ..................................................................................................................................................... 62dB(DOLBY ON, Cr02 tape)
52dB(DOLBY OFF, Normal tape)
Total harmonic distortion .............................................................................................................................................. 1.0%(Normal tape, at 400Hz)
Channel separation ........................................................................................................................................................................................................ 35d8
[General]
Power requirement
AC-400'
E/V ..................................................................................................................................................................................................... AC 220-230V, 50Hz
B ................................................................................................................................................................................................................. AC 230V, 50Hz
S ................................................................................................................................................................................................................. AC 240\/, 50Hz
U, Y .......................................................................................................................................... AC 110/127 /220-230/240V, 50/60Hz convertible
AC-405K
U, Y .......................................................................................................................................... AC 110/127 /220-230/240V, 50/60Hz convertible
Dimension ........................................................................................................................................................................... 270(W) x 280(H) x 371 (D)mm
Weight ................................................................................................................................................................................................................................... 9Kg
Power consumption ....................................................................................................................................................................................................... 88W
6

[Tuner Section]
Frequency range
FM ....................................................................................................................................................................................... 87 .5-108MHz(50KHz step)
MW ........................................................................................................................................................................................ 531-1602KHz(9KHz step)
[E/V /S/B/U5/Y1 /Y3/Y1]
530-161 0KHz(1 0KHz step)
[Ua/Y2/Y4]
LW ............................................................................................................................................................................................. 144-288KHz(1 KHz step)
SW ........................................................................................................................................................................................... 3.8-12.5MHz(5KHz step)
Sensitivity
FM ............................................................................................................................................................................ 3µV (IHF, THO 3%) [EXCEPT V]
5µV (IHF, THO 3%) M
MW ............................................................................................................................................................................................ 700µV (IHF, THO 10%)
LW ............................................................................................................................................................................................ 1500µV (IHF, THO 10%)
SW ................................................................................................................................................................................................ 30µV (IHF, THO 10%)
S/N ratio(IHF A NETWORK)
FM ..................................................................................................................................................................................................................... Mono:70dB
Stereo:65dB
MW ................................................................................................................................................................................................................................. 40dB
LW .................................................................................................................................................................................................................................. 30dB
SW ................................................................................................................................................................................................................................. 30dB
Total H!lrrnonic distortion(at 1 KHz)
FM ..................................................................................................................................................................................................................... Mono:0.8%
Stereo:1.0%
MW .................................................................................................................................................................................................................................. 1.0%
LW .................................................................................................................................................................................................................................. 1.0%
SW .................................................................................................................................................................................................................................. 2.0%
Stereo separation ......................................................................................................................................................................................... 35dB(at 1 KHz)
[Graphic Equlizer]
Center frequency .................................................................................................................... 63Hz/160Hz/400Hz/1 KHz/2.5KHz/6.3KHz/16KHz
Control range ............................................................................................................................................................................................. ±8dB(2dB step)
[CD Section]
Pick up system ................................................................................................................................................................................................. 3 Beam laser
Sampling frequency ................................................................................................................................................................................................. 44.1 KHz
Error correction system ............................................................................................................................................. Cross interleave reed solomon
Number of channels ........................................................................................................................................................................................... 2 Channel
Frequency response .................................................................................................................................................................................... 20Hz~20KHz
S/N ratio ............................................................................................................................................................................................................................. 90dB
Wow & flutter ............................................................................................................................................................................. Below measurable limits
Total harmonic distortion ...................................................................................................................................................................... 0.07% (at 1 KHz)
Channel separation ..................................................................................................................................................................................... 85dB (at 1 KHz)
Dynamic range ............................................................................................................................................................................................. 85dB (at 1 KHz)
* For improvement purposes, specifications and design are subject to change without notice.
7

I. DISASSEMBLY
1. REMOVAL OF COVER-TOP
FRONT-PANEL
--
----
----
---
CHASSIS- BACK
~
.
@-- -- Ulll!!P-!l
-~
0 0
~ ~~ ~~~~~11~~ ~ ~~~~~
-----
~~ij~~~~ 0 ~
----
0-
0o 111111,llll~lllu111111i
~~~~~~~~
-• - 0
~~~~~~~II
------
----
----
(1
0 0
----
-------
.,,/
-------
-----
.,,/
..,
_,/
"
---- ----
---
/
..,
"'
COVER-TOP
2. REMOVAL OF CD MECHA & CASSETTE DECK MAINTENANCE
MECHA-CD
CHASSIS-BACK
CHASSIS-CD
FRONT-PANEL
CHASSIS- BOTTOM
MECHA-DECK
8

II. PRINCIPAL PARTS LOCATIONS
PCB-KARAOKE
PCB-PHONE
PCB-KEY
PCB-CD
PCB-CDG
MECHA-CD
PCB-FRONT
CHASSIS- BACK
COVER-TOP
CHASSIS-CD
PCB-VOLUME
PCB-MIC
PCB-LENS
KNOB-VOLUME
9

COVER-RADIATOR
~
RADIATOR-L
/
PCB-VOLTAGE/SELECT /
\
vv
I PCB-PO'w'ER l
PO'w'ER-TRANS
MECHA-DECK
CHASSIS-BOTTOM
\
1/ ~
I l
I I
10

ill. REPLACEMENT OF PRINCIPAL MECHANICAL PARTS
CD MECHANISM
1. DISMANTLING PROCEDURE OF THE COMPONENTS
CD MAIN PCB
I
I
·co MECHANISM :1----------.------: TRAY BLOCK I
1--------1: PICK-UP BLOCK I
t--------1
1.
SPINDLE MOTOR I
t--------1: TRAY MOTOR I
I SLED MOTOR I
2.REMOVAL OF THE CD MAIN PCB 3.REMOVAL OF THE CD MECHANISM
1)Disconnect the four connectors carefully (These are on the
CD PCB. fig 1. CN601, CN602, CN605, CN606).
1)Remove the four retaining screws, then remove the CD
mecha. unit (fig 2)
DPCB
BACKSIDE
I, SCREW
Fig.1 Fig.2
11

4.REMOVAL OF THE TRAY BLOCK
1) Remove the four retaining screws for clamper and tray.
(fig. 3)
SCREW
CLAMPER
Fig.3
2) Slide the bracket in the direction of the arrow (fig. 4)
Fig.4
3) Pull out the tray ass'y slowly in the direction of the arrow
(fig. 5)
Fig.5
4) Remove the tray block.
12
5.REPLACEMENT OF THE TRAY MOTOR
1) Remove the tray-belt
2) Unsolder the lead wires and PCB of the tran-motor with
a soldering-iron.
3) Remove the tray-motor retaining screws.
4) Remove and replace the tray-motor.
5) Reassemble in the reverse order.
BELT TRAY
SCREW
Fig.6
6.REPLACEMENT OF THE SLED-MOTOR &
REPLACEMENT OF THE SPINDLE -MOTOR
• Remove the four SHAFT CD and the four RUBBER CD
for ASS'Y-MECHA FEED.
• Replacement of the spindle-motor itself is not recom-
mended, because the adjustment
of the turn table
height
is quite critical and necessitating the use of a
special jig.
• Therefore, when need to replace the spindle-motor, please
replace with a ASS'Y-MECHA FEED.
(CD MECHA;CMS-A30A:ADCD-00110-031)
SHAFT ~
CD 7,J
RUBBER-@
CD
Fig. 7
rsHAFTCD
, ®._ RUBBER CD

2. CASSETTE DECK MECHANISM
2-1. REPLACEMENT OF THE PINCH ROLLER
BLOCK
1)Pull the PINCH ROLLER BLOCK upward( ... ) while re-
leasing the PINCH ROLLER RETAINING HOOK.
2) Reassemble in the reverse order.
PINCH ROLLER BLOCK
, __ PINCH ROLLER
RETAINING HOOK
l O O 0
Fig. 2-1
2-2. REPLACEMENT OF THE PB HEAD (TAPE I}
1) Remove the two HEAD RETAINING ® SCREWS.
2) Pull out the HEAD and disconnect all the lead wires with
a
soldering iron, then replace the PB HEAD.
3) Reassemble in the reverse order. After replacement, head
azimuth and PB level adjustment must be performed.
~ HEAD RETAINING
~®SCREWS
Fig. 2-2 '
BLACK/ I '-RED
WHITE
Fig. 2-3
2-3. REPLACEMENT OF THE REC/PB HEAD
(TAPE Il}
1)Removethetwo HEAD RETAINING@ SCREWS.
2) Pull out the HEAD and disconnect all lead wires with a
soldering
iron, then replace the REC/PB HEAD.
3) Reassemble in the reverse order, After replacement,
head azimuth, PB level BIAS current and REC level
adjustments
must be performed.
0
~ HEAD RETAINING
~®SCREWS RE{/ \ \ BLK
/ BLU GND(BLK)
WHT GAN
Fig.2-4 Fig.2-5
2-4. REPLACEMENT OF THE CAPSTAN MOTOR
1) Disconnect the lead wire of the CAPSTAN MOTOR with
a soldering iron.
2)Remove the CAPSTAN MOTOR RETAINING @
SCREWS, then replace the CAPSTAN MOTOR.
3) Reassemble in the reverse order and set the DRIVE BELT.
After replacement, tape speed adjustment must be per-
formed.
CAPSTAN
MOTOR
LEAD WIRE
CAPSTAN MOTOR
- - RETAINING @ SCREW
~
Fig. 2-6
2-5. REPLACEMENT OF THE DRIVE BELT
1)Remove the CAPSTAN MOTOR RETAINING @
SCREWS. (refer illustration Fig. 2-6)
2)Separate the MOTOR PCB from the MECHA BLK.
Replace the DRIVE BELT.
3) Reassemble in the reverse order. After replacement, con-
firm the tape speed and if the result is not satisfactory,
adjust the tape speed.
MOTOR PCB
DRIVE BELT
Fig. 2-7
13

MECHANICAL ADJUSTMENT
2-6. ADJUSTMENT OF,J"HE PB HEAD AZIMUTH
ALIGNMENT (TAPE I)
REV AZIMUTH ALIGNMENT
@SCREW
Fig. 2-8
FWD AZIMUTH ALIGNMENT
®SCREW
1)Connect an AC milli-voltmeter to the TEST POINT TP401
(refer to the illustration on page8.) and connect an oscil-
loscope's
input CH-1 and CH-2 to the output of the AC
milli-voltmeters.
2) Play back the 10kHz(-15dB), HEAD AZIMUTH ALIGN-
MENT TEST TAPE(MTT-357G) then adjust the PB HEAD
AZIMUTH ALIGNMENT ® (FWD PLAY) and @ (REV
PLAY) SCREW respectively so that the reading on the AC
milli-voltmeters are at maximum and waveforms on the
oscilloscope are in the same phase, in both FWD and
REV directions.
2-7. ADJUSTMENT OF THE REC/PB HEAD
AZIMUTH ALIGNMENT (TAPE Il)
1)Connect an AC milli-voltmeter to the TEST POINT TP401
(refer to the illustration on page8.) and connect an oscil-
loscope's
input CH-1 and CH-2 to the output of the AC
milli-voltmeters.
2) Play back the 10kHz(-15dB), HEAD AZIMUTH ALIGN-
MENT TEST TAPE(MTT-357G) then adjust the REC/PB
HEAD AZIMUTH ALIGNMENT ® (FWD PLAY) and @
(REV PLAY) SCREW respectively so that the reading on
the AC milli-voltmeters are at maximum and waveforms
on the oscilloscope are in the same phase, in both FWD
and REV directions.
REV AZIMUTH ALIGNMENT
@SCREW
14
Fig.2-9
FWD AZIMUTH ALIGNMENT
®SCREW

2. TUNER ELECTRICAL ADJUSTMENT
NOTE: 1.Set the S.S.G. to 1kHz, 75kHz
deviation
for@], ~, [[], ~, ~ or []
NOTE: 1. Set the S.S.G to 1 kHz 30% modulation
model, 1kHz, 40kHz deviation for ~ model.
on each adjustment.
2. Frequencies indicated in < > are for
the SW model.
EDI ADJUSTMENT.ITEM
LW<SW>
1. SSG FREQ. & OUTPUT LEVEL
LW<SW>OSC
2. SET Tuning FREQ.
IJI LW <SW> SENSITIVITY
1. -
3.ADJ.
Part
1. 160kHz, 70d8µ <4MHz, 35d8µ>
2. 144kHz <3.8MHz> PRESET 11 CH <11 CH>
4. REMARKs( •) & RESULT{*) 2.160kHz
<4MHz> PRESET 12CH <12CH>
3.T104
,/
3. T102 4. • Connect the Digital DC Voltmeter between
/
4. • Connect the milli-voltmeter to LINE OUT
JW4andGND.
~/
* Maximum output level. * 1.4 ± 0.1V <1.0 ± 0.1V>
Test Point
Adjustment Part
AM
FM
NOTE:Set the S.S.G to 1 kHz 30% modulation
on each adjustment.
I
111
DISTORTION(STEREO)
1. 98.0MHz, 60d8µ (STEREO Lor R channel
Ill AMIF
only)
>
2. 98.0MHz (PRESET 3CH)
T106
I
FRONT
1. 603kHz, 60d8µ
3. IFT (FRONT END)
FE101
~-
2. 603kHz (PRESET 7CH)
4. • Connect the distortion meter to LINE OUT.
TE101
~
3.T106
* Minimum Distortion
....
SV103
4. • Connect the milli-voltmeter to LINE OUT.
I @ *
Maximum output level.
SV101
Ill TUN&NG LED
@
1. 98.0MHz, 22dBµ (MONO)
T101
I 1-------T..,
30
25 20
16
II
TUNING LED
~~
..., •------ I 2 I
2. 98.0MHz (PRESET 3CH)
I I
JC101
1. 603kHz, 60d8µ
3. TUNED indicator on the FL display.
I
2. 603kHz (PRESET 7CH)
I
4. * TUNED indicator is lit.
T102
I 1 5
10
15
3. TUNED indicator on the FL display, SV103
I
[j]-
I @
4. TUNED indicator is lit.
I
I
T105
l
SV102
Ill CENTER VOLTAGE
l
~
T103
I
r}~
1. 98.0MHz, 60d8µ (MONO)
~
I
AM(MW)OSC
...
L a:
l
2. 98.0MHz (PRESET 3CH)
1.-
3.T105 •
2. 531 kHz(PRESET 6CH)
4. • Connect the DC Digital Voltmeter to both
~
3.T103
ends of R138.
4. • Connect the Digital DC Voltmeter
*0±50mV
T104
between JW4 and GND.
*1.0V ± 0.1V
--------
_....
- STEREOSEPARATION
--
-
1. 98.0MHz, 60d8µ (STEREO Lor R channel
AM(MW) SENSITIVITY
only)
MAIN PCB(A1U-311)
1. 603kHz, 70d8µ
2. 98.0MHz (PRESET 3CH)
TUNER PART <TOP VIEW>
2. 603kHz (PRESET 7CH)
3.SV102
3.T101
4. • Connect the milli-voltmeter to LINE OUT.
4. • Connect the milli-voltmeter to LINE OUT
* Minimum output level for opposite channel.
* Maximum output level.
16

IV.ADJUSTMENT
1. TUNER INSTRUMENT CONNECTIONS
AM S.S.G
OUTPUT
TEST LOOP
ANTENNA
closer to the set
DISTORTION
METER
INPUT
SET
Leh OR Reh.
OUTPUT
Instrument connection for AM (MW, LW) section adjustment
AC
VOLTMETER
AC
VOLTMETER
AM (SW) S.S.G
04-...;...+-+---+-<J 75 OHMS
OUTPUT ANTENNA
TERMINAL
AC
VOLTMETER
FM STEREO
GENERATOR
SET INPUT
DISTORTION
METER
Leh
INPUT
Instrument connection for AM
(SW) section adjustment
FM S.S.G
Leh
OUTPUT
n-1-...:......~~ EXT. MOD 0-4-~....,;.----4-0 75 OHMS
OUTPUT INPUT ANTENNA
OUTPUT TERMINAL
Reh
OUTPUT
AC
VOLTMETER
INPUT
AC
VOLTMETER
SET INPUT
DISTORTION
METER
Leh
INPUT
tnstrument connection for FM section adjustment
15

4. CASSETTE DECK ELECTRICAL ADJUSTMENT
[PRECAUTIONS BEFORE ADJUSTMENl]
1. Before adjustment, clean and de-magnetize the
heads and tape guides.
2. Set the Dolby NR switch off.
3. Use the following recording test tapes.
NORMAL position : TDK AC-224
Cr02 position : TDK AC-513
4. LINE OUT = TP401
ADJUSTMENT
1. TEST TAPE/INPUT SIGNAL
2.MODE
3. CHECK POINT, ADJUSTMENT PART
4. REMARKS(•) and RESULT(*)
18
,,,,,,,
/
/
Adjustment Part Test Point
RECORDING LEVEL
1. NORMAL recording test tape(AC-224),
1 KHz, -6.0dBs(LINE OUl)
2. REC----+PLAY
3. LINE OUT, SV405(L-ch), SV406(R-ch)
4. • Connect an AC milli-voltmeter to LINE OUT
* -6dBs(±1dB)
TAPE I PB LEVEL
1. 400Hz test tape(MTT-150)
2.PLAY
3. LINE OUT, SV401 (L-ch), SV403(R-ch)
4. • Connect an AC milli-voltmeter to LINE OUT
* 580mV(-2.5dBs)
TAPE I PB LEVEL
1. 400Hz test tape(MTT-150)
2. PLAY
3. LINE OUT, SV402(L-ch), SV404(R-ch)
4. • Connect an AC milli-voltmeter to LINE OUT
* 580mV(-2.5dBs)
NOR HI H
@@
SV1 SV2
RX1001
~·
.. TP1001
D
FRONT PCB(A 1 U-312A) <TOP VIEW>
NOR
SV3 @----------+---.
SV4@
HIGH
MAIN PCl,l(A1U-$11) DECK PART <TOP VIEW>
8 IC402 ~
8 IC305 ~
~~□
EJ 6 . 9~
D
6
SV405 SV406
@@
IC303
SV401 SV403
@@
T403
--~
----::----:,
I
~ @@
O
f Ol
~ ..... SV408 SV407
@@
.__ ___________ s_v __ 4,,_02_s .. "'4_04------+-------1--------- ~
BIASOSC FREQUENCY
1. Cr02 type blank tape
2.REC
3. P31 (6 pin), T 403
4. • Connect a frequency counter between
P31(6 pin) and GND
*105 ± 5KHz
TAPE l HIGH (X 2) SPEED
1. 3,000Hz test tape (MTT-111 DN) in TAPE I
A
blank tape in TAPE Il
2. PLAY(press the x 2 DUBBING START button)
3. LINE OUT, SV2
4. • Connect a frequency counter to the
LINE OUT
* 6,000 ± 120Hz
TAPE I NORMAL(X1)SPEED
1. 3,000Hz test tape (MTT-111 DN)
2. PLAY
3. LINE OUT, SV1
4. • Connect a frequency counter to the
LINE OUT
* 3,000 ± 60Hz
TAPE I HIGH (X2} SPEED
1. 3,000Hz test tape (MTT-111 DN) in TAPE IT
2. PLA Y(During adjustment, short TP1001.
After adjustment, remove it.)
3. LINE OUT, SV4
4. • Connect a frequency counter to the
LINE OUT
* 6,000 ± 120Hz
TAPE ll NORMAL (X1) SPEED
1. 3,000Hz test tape (MTT-111 DN)
2. PLAY
3. LINE OUT, SV3
4. • Connect a frequency counter to the
LINE OUT
* 3,000 ± 60Hz
HEAD AZIMUTH ALIGNMEN't(TAPE: I & ll)
1. 1 0KHz -15VU test tape(MTT-357G)
2. PLAY
3. LINE OUT, HEAD AZIMUTH ALIGNMENT
SCREW (refer to the page 14)
4. • Connect an AC milli-voltmeter to LINE OUT
* Maximum output level.
N.ORMAL POSITION BIAS
1. NORMAL recording test tape(AC-224),
1 KHz and 1 0KHz, -26dBs(LINE OUl)
2. REC----+PLAY
3. LINE OUT SV408(L-ch), SV407(R-ch)
4. • Connect an AC-milli voltmeter to
LINE OUT
* Playback level difference between 1 kHz
and 10kHz after recording is within ± 0.3dB

3. CD ELECTRICAL ADJUSTMENT
* CD adjustment starts after T.O.C. in the normal mode.
ADJUSTMENT
1. TEST DISC
2.MODE
3. TEST POINT and ADJUSTMENT parts.
4. REMARK(~) and RESULT(*)
/
Test Point
/
/
Adjustment Part
TRACKING SERVO GAIN
CN602 J I CN601
r---
1. Test disc A-BEX TCD-781 I
2. PLAY mode I
3. IC601 48pin/SV601 I
4. • Connect an osciiloscope to the I
IC601 48pin. I
~;;....... r;i; ~ ~~
@
SV604
@
SV603
AC-200/400 CD
pin
TP-
l . """--------
1
00
•••••••••• tJ i TE1 I
,,.~~""'"'' 0 : r------1---+-----'--------+---~i----+--
' .180mV ~- 2.5V J I
"~ lililiiiiL.ll.ti.l!Ual; 11UJ ~i.lf 1u1i ~ .. ~ as
I 111111 C @@ l~aooj I=\
L ■_■_■ __ ■_■_ ■_ ■_■_ ■ ___ J--t----r------s-=---""°' _SV602_J •. !C600 I fCNeos 1.--
1
--
, -------==::::; _ CN615
L...--------------..........1 L!:::==:!._ _ _J
FOCUS SERVO GAIN
1. Test disc A-BEX TCD-781
2. PLAY mode
3. IC601 46pin/SV602
4. • Connect an oscilloscope to the
IC601 46pin
*50mV
FOCUS BIAS
1. Test disc A-BEX TCD-781
2. PLAY mode
3. CN607(1, 2pin)/SV604
4. • Connect an oscilloscope to the RF and GND
Press PLAY button and adjust the RF
signal to maximum
*1.4Vp-p
E-FBALANCE
1. Test disc A-BEX TCD-781
2.PLAYmode
3. CN607(3, 7pin)/SV603
4. • Connect an oscilloscope to the TEO
or TE1 and 2.5V(CN607 ?pin)
• Set SV601 to minimum position.
(Center--+ Left) then, set SV601 to
CENTER position
*A=B
■
DC
2.sv--iff
••••
■■■■■
17

1. RECOMMENDED SPARE PARTS
31 ICDG-01300-TP0 ECHO SOUND PROCESSOR
ES56028E DIP28 [405K]
Ref.No. Part No.
Description
32 ICDG-00370-S20 IC TAPE SELECTOR
• ACAC-00063-000 CORD-AC [E, V, U, Y]
µPC1330HA SIP9
KKP419C
33
ICDG-00560-SO0 IC MOTOR DRIVER
2 * ACAC-00083-000 CORD-AC[S)
BA6208SIP9
KKP-500
34
ICDG-00940-SE0 IC D.S.P+D.A.C (CDP)
3 *
ACAC-00094-000 CORD-AC[B)
KS-9282B QFP80
CW3201
35 ICDG-00950-SE0 IC RF+SERVO (CDP)
4 BTCE-00050-Q04 FILTER-CERAMIC
KA-9220B QFP80
SFU450B
36
ICHP-00070-S10 IC HYBRID AMP-POWER
5
BTCE-00060-107
FILTER-CERAMIC [EXCEPT V1)
STK4142 Il 25Wx2 SIP18
SFE 10.7MS3G-A
37 ICHY-00210-SG0 IC REMOTE RECEIV
6
BTCE-00152-107 FILTER-CERAMIC [V1]
NJH41 H380-L UNIT 4
SFE 10. 7MJA 1 OM-A
38
ICLN-00540-SO0 IC 2CH PRE AMP
7 * CACS-U102K-129 CAPACITOR AC
BA3416BL DIP16
DE7090B102KVA1-KC 400V S
39
ICLN-00610-S10 IC AUDIO SENSER
8
DDMR-0021 0-T11 DIODE-RECTIFIER
LA2000SIP9
1 N5402S (200V 3A) D0-20 M
40
ICLN-00681-SA0 ICOOLBYB
9
DDSV-0003B-S30
DIODE-WC
HA12136A DIP16
1SV149B AM 8V DIP2 S
41 ICLN-01550-S50 IC7BANDEQ
10 DDTR-00040-T10 DIODE-RECTIFIER
AN7337N DIP20
1 N4004 (400V 1A) D0-41 T
42 ICLN-0181 0-S40 IC VOCAL FADER [405K]
11
DDTS-00060-SOO
DIODE-SI
CXA1642P DIPS
1SS131 (90V 0.13A) D0-40 T
43
ICMP-01260-SA0
IC UCOMPUTER
12
DDTZ-G056B-SOO DIODE ZENER
TCM-9503-008 QIP100
MTZ5.6B 5.45-5.73 D040 T 44
ICMP-01270-SA0 IC UCOMPUTER
13 DDTZ-G082C-SOO DIODE ZENER
TCM-9503-009 QIP80
MTZ8.2C 8.03-8.45 D040 T
45 ICLN-01590-SE0 IC MOTOR CONTROL CDP
14 DDTZ-G091 B-SOO DIODE ZENER
KA-9258D HSOP28
MTZ9.1 B 9.01 D040T
46 ICOP-00130-SE0 IC DUAL OP AMP
15 DDTZ-G130B-SOO DIODE ZENER
KA4558S SIP9
MTZ13B 12.55-13.21 D040 T
47 ICLN-01640-S10 IC AM/FM IF MPX
16 DPFL-00370-GCF V.F.D
LA1851N DIP30
CM1369D
48 ICOP-00131-SE0 IC DUAL OP AMP
17 DPLT-00073-YC3 DOT-LED
KA4558C DIPS
SLR-34YC3 YEL R3 TAPPING
49 ICRG-00081-SE0
IC REGULATOR
18
DPLT-00311-WW5
DOT-LED
KA7924 24V 3mm TO-220
SPR-54MVW (2COLOR) R5 D
50 ICRG-00091-SE0
IC REGULATOR
19
DPLT-00452-YC5 DOT-LED
KA7806 6V 3mm T0-220
AL-151YC YEL R5 N
51 ICRG-00191-SE0
IC REGULATOR
20
ESRY-00010-120 RELAY
KA7912 12V 3mm TO-220
HR-703V DC 12V
52 ICRG-00218-SE0
IC REGULATOR
21
• FGFB-S1002-337 FUSE GLASS [U, Y]
KA781212V3mmTO-220
1A250V5x20 53
ICRG-00240-SE0
IC REGULATOR
22
* FGFB-S2002-337 FUSE GLASS
MC78L05 5V T0-92
2A250V 5x20
54
IFFD-00140-E60
IFT-FM DET
23
• FGFB-S8001-337 FUSE GLASS
AFD014 7.4mm-CAN
800mA 250V 5x 20
55
KIAA-00140-EDO
COIL-AM IFT
24
ICCM-00060-SQO
IC QUAD SWITCH
AAA-014B
GD4066B DIP14
56 KIAO-00240-E20
COIL-AMOSC
25
ICCM-00170-SQO
IC 4CH MUX/DEMUX
AAO024 MW ?mm-CAN
GD4052B DIP16
57 KIAO-00250-E20
COIL-AMOSC
26
ICCM-20360-TOO IC VOLTAGE DETECTOR
AAO025 LW ?mm-CAN
S80721AN T0-90
58 KIA0-00260-E20
COIL-AMOSC
27
ICCM-20380-S10 ICPLL
AAO026 SW ?mm-CAN
LC7218 DIP24S
59
KIAT-00301-E20
COIL-AM ANT
28
ICCM-20390-SGO
IC ELECTRONIC VOLUME
AAT030-1 LW 1 0mm-CAN
NJU7305 SDIP28
60
KIAT-00351-E20
COIL-AM ANT
29
ICCM-20501-S30 IC CMOS
AAT035-1 MW 1 0mm-CAN
TC4094B DIP16
61 KIAT-00370-E20
COIL-AM ANT
30
ICCM-20710-TQO
IC GRAPHIC EQ FILTER
AAT037 SW 10mm-CAN
XR-1093 DIP14
20

V. PARTS LIST
ATTENTION
1. When placing an order for parts, be sure to list Part No, Model No. and the description of each part.
Otherwise, the. non-delivery of the part or the delivery of a wrong part may result.
2. Please make sure that Part No. is correct When ordering.
If not, a part different from the one you ordered may be delivered.
3. Since the parts shown in Parts Ust of Preliminary Service Manual may have been the subject of changes,
please use this Parts List for all future reference. ·
[NOTE]
1. This Parts List lists those parts which are considered necessary for repairs. Other common parts, such as resistors and
capacitors, are listed in the "Common List for Service Parts" from which these parts should be selected and stocked.
2. The Recommended Spare Parts List shows those parts in the Parts List which are considered particularly important
for service.
3. Parts not shown in the Parts List and "Common List for Service Parts" will not in principle be supplied .
. YI~
A(*) l~OIOAttc ~ CAmoAL COMPONENTS. FOR CONTINUED~. REPLACE •SAFETY
CRITIC,tl C()MPONENTS .ONLY WITH MANUFJ\QTUAE'S R~OPAATS.
AVERTISSIMENT .
A(*) ll INOIQUE LES COMPOSANTS CRmQOES OE SiCUFUTE. POUA MAINTENIR LE lleGRI± OE
SECURIJEOE l'APPAREIL. NE REMPLACEA QlJE DES PIECES RSOOMMANOEES PAA IA FABBICANT.
19