Akai AC 413 R Service Manual

Page 2

CONTENTS

SAFETY INSTRUCTIONS ........................................................................................... 2
INFORMATIONS ........................................................................................................... 3
SPECIFICATIONS ....................................................................................................... 4
CONTROLS ................................................................................................................. 6
I. DISASSEMBLY ........................................................................................................ 8
II. PRINCIPAL PARTS LOCATION ........................................................................... 9
III. DISASSEMBLY OF MAIN COMPONENTS .......................................................... 11
IV. MECHANICAL ADJUSTMENT .............................................................................. 16
V. ELECTRICAL ADJUSTMENT ................................................................................ 17
VI. PARTS LIST ......................................................................................................... 19
VII. ABBREVITIONS .................................................................................................... 34

Page 15

3-2.TAPE-I & TAPE-ll MECHANISM BLOCK

3-2-1. Removal of the MECHANISM BLOCK

1) Remove the FRONT PANEL BLOCK.

2) Remove the tour screws for each of the TAPE-l and
TAPE-ll MECHANISM BLOCKs then remove the
MECHANISM BLOCKS Irom the FRONT PANEL BLOCK.

TAPE JIMECHA. BLOCK TAPE -I MECHA. BLOCK

Fig. 3-15

32-2. Replacement of the CAPSTAN MOTOR

NOTE :Alter replacement. tape speed adjustment must be
performed.

1) Unsolder the flat cable on the CAPSTAN MOTOR with a
soldering iron.
2) While pressing the INTER-LOCK LEVER in the direction

of the arrow, remove the two ® screws and then remove
the CAPSTAN MOTOR.

scnew

CAPSTAN MOTOR

Fig. 3-16

3) Install a new motor and re-assemble in the reverse order
for installation.

14

3-2-3. Replacement ot the FR BELT

1) Unthread the MAIN BELT and replace the FR BELT as
shown in Fig. 3-17.

2) Proceed in the reverse order for installation.

3-2-4. Replacement of the MAIN BELT
1) Remove the CAPSTAN MOTOR

2) Replace the MAIN BELT and re~assemble in the reverse
order (or installation.

FR BELT

MAIN BELT

Fig. 3-17

3) After replacement, check the tape speed and N the result

is not satisfactory, tape speed adjustment must be
performed.

3-2-5. Replacement of the PINCH ROLLER BLOCK
1) Extract the PINCH ROLLER BLOCK upwards while

releasing the pinch roller retaining hook in thedirection oi
the arrow.

CAPST AN

PINCH ROLLER BLOCK

Fig. 3-18

2) Replace the PINCH ROLLER BLOCK and re assemble in
the reverse order. Attach the spring in the corect position
when placing the PINCH ROLLER BLOCK.

Page 19

5-2.CD PLAYER SECTION
TEST MODE FOR co PLAYERZS OPERATION

Some adjustments of the CD PLAYER section are automatically carried out by the micro computer.

if the CD player section is defective and it is necessary to partially check the operation, CD TEST" mode can be used while

repairing.

Engaging the CD TEST MODE

While pressing and holding both the CD1" and >(F)" buttons, plug in the AC power cord to the AC outlet.

Note '.

A During CD TEST" mode, only the DiSC"1"A open/close button can be used for loading. 80, place a disc on TRAY 1",

' Proceed testing by pressing the CD1" button once for each testing step.
- To disengage the CD TEST" mode, press the POWER ON/STANDBY button or disconnect the AC. power cord from the

AC outlet.

i
DISPLAY

FUNCTION

T0 (TEST-O)

Initial condition of the "CD TEST" mode.

T1 (TEST-1 )

Perform focus search".

T2 (TEST-2)

Turn on the focus servo".

T3 (TEST-3)

Mode of the "E-F balance" adjustment

T4 (TEST-4)

E~F balance adjustment is carried out automatically and its data value is displaflon the FLD.

T5 (TEST-5)

Mode of the Tracking gain adjustment.

T6 (TEST-6)

Tracking gain adjustment is carried out automatically and its data value is disflyed on the FLD.

T7 (TEST-7)

Normal playback mode is engaged.

TC-DK PCB 2. Play back
MW 3. JW44 and VR1200
JmarsVR1-209____-" 4. Connect the hot side probe of an AC
" milivoltmeter to JW44 on the BIAS osc

1 FOCUS OFFSET

1, Test disc (SONY TYPE-Ill)

PCB and GND side probe to the chats is.
Adjust the VR1200 on the TC-DK PCB until
indication of the AC milivoltmeer is

maximum.

18

Page 28

9. AC-410I413RI41 5K

mummAwN-xfi
.71
Z
O

to

10
11
12
13
14
15
16
17
18
19
20
21-3
21-h
22
23-.(AC-410)
23-b(AC-413R)
23-C(AC-41 5K)
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41

PARTS NO.
606A301208-00
606A301208-00
402-385002-01
495-385017-01
284-385001-01R
619-300208-00
619-300208-00
619-300208-00
428385001-01
619-300208-00
619-300208-00
292-385002-01 S
229-385011-01R
291v385014-01 S
606A301208-00
291-385005-01 Z
250-385001-013
292-385001-018
259-385004-01 Z
291 -385001 -01 S
229-385006-01Z
229-385001 ~01Z
291-385002-018
200-385011-01R
200-38501 1 ~03R
200-385013-01 R
275-385001-018
261-385001-01 K
259-385001-015
219-385002-01 R
286-385001-018
263-385001-01 K
601 ~264506-60A
619-300312-00
273-335001-015
619-300306-00
211-385011-015
263-38500301 L
234-38501 1~01K
273-385002-01 S
606A301208-00
606A301208-00
614-300208-00
606A301208-00

42-a(AC-410 E1.B1,E3)495-385001-01

42-b(AC-410 S1)
42-C(AC-413R RE1)
42-d(AC-415K U5,Y6)
42-e(AC-415K U8,Y7)
43

44

45

46

47

48

49

495-385001 ~03
495-385001 ~05
495-385002-01
495-385002-03
650-381301-01
619-300403-00
207-385101-012
619-300208-00
428-385003-01
428-385001-01
481 -3851 01 ~01

27

DESCRIPTION

TAPING SCREW P TYPE BID H 3X1.25PX8MM
TAPING SCREW P TYPE BID H 3X125PX8MM
MAIN COVER BLACK

REAR CABINET SUB

MECH SPACER BLACK HI-PS

TAPING SCREW P TYPE BID H 3X8MM BLACK
TAPING SCREW P TYPE BID H 3X8MM BLACK
TAPING SCREW P TYPE BID H 3X8MM BLACK
CD BRACKET 'L'

TAPING SCREW P TYPE BID H 3XBMM BLACK
TAPING SCREW P TYPE BID H 3X8MM BLACK
DOLABY BUTTON (A)

FLD BRACKET HI-PS

FUNCTION BUTTON ABS

TAPING SCREW P TYPE BID H 3X1.25PX8MM
CD FUNCTION BUTTON ( B ) ABS+PC

LAMP HOLDER WHITE ABS

REC BUTTON BLACK ABS

INTERLOCK 'R' POM

POWER BUTTON BLACK ABS

LATCH BRACKET BLACK POM

LATCH BRACKET (L) POM

CD FUNCTION BUTTON (A )

FRONT CABINET Hl-PS

FRONT CABINET Hl-PS

FRONT CABINET Hl-PS

TIMER BUTTON BLACK ABS

CASS DOOR LENS ( L ) SMOKE

INTERLOCK HOLDER 'L' ABS

CD DOOR Hl-PS

NAME PLATE 'AKAI

DISPLAY LENS AS

TAPPING SCREW FLAT HEAD 2L6X6MM
TAPPING SCREW P TYPE FLAT HEAD 3XBMM
VOLUME KNOB ABS

TAPING SCREW P TYPE FLAT HEAD 3X6MM
CASS DOOR ( L ) HI-Ps

DIR LENS CLEAR ACRYLIC

CONTORL SUB PANEL AS

MIC KNOB BLACK ABS

TAPING SCREW P TYPE BID H 3X1.25PX8MM
TAPING SCREW P TYPE BID H 3X1.25PX8MM
SELF-TAPPING SCREW Brr 3X8MM BLACK
TAPING SCREW P TYPE BID H 3X1.25PX8MM
PANEL REAR

PANEL REAR

PANEL REAR

PANEL REAR

PANEL REAR

CORD BUSHING

TAPING SCREW BIT WASHER 3X8MM BLACK
REAR FOOT (PLASTIC) BLACK EVA

TAPING SCREW P TYPE BID H 3X8MM BLACK
HOLDER BRACKET SECC-E20 T=1

HOLDER BRACKET ( H )

HEAT SINK ( H )

Page 35

XII. ABBREVIATIONS

TUNER

ABBREVIATION EXPLANATION ABBREVIA110N EXPLANATION

AFC Auto Frequency Control MEVIO MEMOry

AGC Auto Gain Control Ml-COM Mloro-COMputer

ALC Auto Level Control MIN MlNimum

AM Amplitude Modulation MD( MlXing

AMP AMPIifier MPX MultiPIeX

ANT ANTenna MW Medium Wave(trequency)
BATI' BATI'ery NC No Connection

BLK BLOCK NFB Negative Feed Back
BUFF BuFFer OSC OSCillator

COMP COMParator PCB Printed Circuit Board

DET DETect(DETector) PLL Phase Locked Loop

FLD FLuorescent Display Q.D Quadrature Detector

FM Frequency Modulation Rch Right channel

FREQ FREQuency REF REFerence

GND GrouND REG REGulator

H High RF Radio Frequency

HPF High Pass Filter SEG SEGmenl

IF Intermediate Frequency SELE SELEctor

IHF Institut of High Fidelity SENS SENSitivity

lND INDicator SIG SlGnal

I/O lnlOut SIN Signal to Noise Ratio

JW Jumper Wire SSG Standard Signal Generator
L Low STD STanDard

LCD Liquid Crystal Display SW Switch: Short Wave(frequency)
LCH Left CHannel THD Total Harmonic Distortion
LED Light Emith'ng Diode TP Test Point

LPF Low Pass Filter VCO Voltage Controlled Oscillatcr
LW Long Wave (Frequency) VR Variable Resistor

X'TAL Crystal

34