Akai AJC 3300 Service Manual

Page 1

4.

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9"AKAI , - T , : MODEL
Service Manual AJ-C3300

CAUTION : Before servicing the chassis, read The important service safety mfonnation Section on
page 2 of this manual. _. 1 a

PORTABLE AM/FM RADIO WITH CD PLAYER AND CASSETTE RECORDER

SPECIFICATIONS , ' ' CONTENTS
mm TUNER SECTION fixerORTANT SERVICE SAFETY INFORMTID -A
ANTENNA SYSTEM AM: FERRITE BAR ' DISASSEMBLY INSTRUCTIONS"... ............. _
FM: TELESCOPIC MSMNT LOCATIONS-m;-
TUNING RANGE AM: 5224mm _ ALIGMNT PROCEDURES .............. _ I
FM: 87. s~10sMh: 1c Tamer; Dmcms __-_ ......... _
AUDIO SECTION . Vt VOLTAGE CHARTS- ..................
SPEAKER IMPEDANCE : 4 Ohms _ . RchK DIAGRAM .................................
GENERAL : 2.0W l 2;; I .' WING DIAGRAM _____________________________ _
VPOWER INPUT : Ac 230v, sofii DC 12v PRTN'IED CIRCUIT BOARDS-- .................... _
AC POWER CONSUMPTION 12w SCI-[EMATIC DIAGRAMS-.--. .................. ..
DIMENSIONS , : sum) x 324(W)>< 206(11)mm ETXPLODED VIEW/PARTS LIST(CABINE'I)--- -
WEIGHT .» 3.21:; RETLACEMENT PARTS LIST - "w

[SERVICE PUBLICATION-
Note: All The Specifications features Subject to change without notice. 1 1 JUN 2002

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t. SAFETY PRECAUTIONS - ~
(amt-emu unitto lhecustomer. olwaysmaha Inletyotleckollhe

mm. mwmmumolmbuerunwmam
I. Besmthalnobliif-In ploiectivedevtcesarodelecttve Ildlorhav'obeen

defeated during servicing-
(1) ProtectIVI shields are provided Ito protect both the technician and

the customer. Correctly replace all missing protective shields1

I-tetudlru any retrieved tor seMctrlg convenience. ~

(2; mmualiirumechasslsendforomersssernbleshthocabinct.
hemloputbackin pbcealproteottvedevloes.. Itcudmbtlml
limited to. nonmetatlic control knobs. Insulating ltshpapers.
odittsbnflltarrdcomparbnenteovemshietds andhotalionresistorr
capacitu'networis. Donuopolabctt'llsunltol'permifllobeeperete'd
vdtltomalprotectivedctdcoscorrecuykfitaliedandlmctlorung.

b. He su-e that there are no cabinet openings through which an earth or
child mtghtheable Io hectihelrllngetsanacanlaculezarumvmge.
Such openings hlclude. butare not limited to. encusivdywide cabinet

vatfltadonclélsardmlmpmperlyrfledandlorhconectlysecruedcabinet
back cover.

5'. mm: currutt Hut check- with the unl. completely reassembled.

plug the Ac tine acid directly Into a IZOVAO outlet. (Do not use an

isolation Iranslormuduflnglhiclcs't.) Use: teatcagecwrenttestemra
mctcrina system thatcflmptiflmhmflcanNatimalShndalds Inetiuie

(ANSI) .6101 .I 'Leatlaue current for Appliances' and Undenilrlters

Labantiplies NUI410.(5IJ.7).W311 the unltAC switch lirst. h the ON

posiionandthfllhlheOFFposiimmcasmkpmalowwnearthgmmd

(metal water ptpa. conduit. etc.) to all exposed metal parts of the unit

(antemas. handle bracket. metal cabinet. screwheads. metallicwedays.

control shalt. etc). especially any exposed metal parts Illat offer an

electrical return path to the chassis. My current measured must not
exceed 0.5 rrlIIIiamp. Reverse the unit potter cord plug In the outlet and
repeal teat. ANY MEASUREMENTS NOT WITHIN THE LIMITS

SPECIFIED HERENIN INDICATE A POTENTIAL SHOCK HAZARD

TAHT MUST BE EUMINATED BEFORE RETURNING THE UNIT TO_

THE CUSTOMER. _ ._

Ac Leakage Test $33953???
0.5M)
TEST ALI.
353E: estrogen MEW- +
TEST - LEAKAGE
. CURRENT , ,
WE CORD TESTER 1
ALSO TEST MTH
PLUG REVERSED EARTH . .
a (USING Ac ADAPTER GROUND
PLUG A5 REQUIRED) H

.1. Insulation Resistance Test Gold Check _ _.
Unplug the power supply cord and connect a jumper wire between the
two prongs of the plug.
Turn on the power switch of the unit.

Measue the resistance with an ohmmeter between the jumpered AC ,

plug and each exposed metallic cabinet part on the unit. such as
screwheads. antenna. control strolls. handle brackets. etc. When the
exposed meterlc part has a return pattt to the chaste. the reading should
be between I and 5.2 megohms. When there is no return path to the
classic the reading must be'hl'rlie". If It Is notwihin the Inlfls specified.

Ihere' rs the possibility ol a shock hazard. and the unit must be repaired '

2 and rechecked before it Is returned to the customer.

' IMPORTANT Slight-3E SAFETYINFORMATION

ANTENNA
TERMINAL

EXPOSED

iiii __.-_¢i'
- . Q OHMMETER

7. PRODUCT SAFETY NOTICE

Some electrical and mechanical parts have special salety reia.
duractoflstics which are alien not evident Irorn visual inspection. not" i
the protection they give necessarily be obtained by replacing them tl
components rated (or higher wilaoe. e. etc. Paris that have sper
safety characteristics are Identified by a on schematic and parts I
Use of a substitute replacement that does not have the same saf-
charactertstlos as the recommended mpiacernent part might create she.
ttle, Inde other hazards. Product Safety I: under review! 'ccnttnucusly a
new Instructions are issued Mlenevcr appropriate.

SERVICING PRECAUTIDNS

cAU'flONfleI'ure servicing the unharmed by his service manual ar
I3 supplements. mad Ind IoIIoW'ti'li' -§1AFETY PRECAUTIONS on in
pago. NOTE: It unforeseen circtimstances create I conflit between tl
following scrvtclng' prcauttons andany- oi the screw precautions. alwag
follow the safety preauttons. Remember: Safety FiraL

General Servicing Precautions.

I. Army: unplug Ihe mire Ac poWer cord [rpm the Ac power sour

before: -
(I) ramming or reinstalling any component, circuit board. module, or a

other unit assembly.
(2) disconnecting or reconnecting any Unit eieclrtcai plug or olhor electric

connection.
(3) connecting a test substitute In parallel with an eiecu'olytic capacitor

the unit. .
Caution: A_ wrong part substitution of Incorrect polarity Installation

eieolrotytic capacitors may result In an explosion hazard.
b. Do not defeat any plug/socket Br- voltage tnmrlochs with which the ul
covered by this service manual might be equipped.
c. Do mtapplyAcpowertzo this utit andror myolls electrical asset-non:
unless all solid-state device heat sinks are corrcctly installed.

a. Always correct a test unt. Instruments ground lead to the unr's chase

.ground before connecting the test Instruments positive lead. Alwa:
remove the tcstlnstrum'ent's ground lead last.

. LASER PRECAUTIONS

WARNING" .
1. When serVIcIng. (In case it Is necessary to confirm Laser Bea
Emission) be sure not to place your eyes any closer than 1 it or 30::
lrom the surface of the Objective Lens on the Opticvai Pickup Btocl

HANDLING THE IASER PICKUP

2. Laser clinics are cflrerrreiy susceptible to damage from static eiectricil
Even If a static discharge does not min the diode. it can shorten Its it
or cause It to work Improperly When replacing the pickup. Use
conductive mat on the floor and desk and wear a wrist band connecte
to around through a 1M ohm resistor to protect the laser diode II'DI

' static damage. If the lens should get dusty, blow oil the dust careful
Irorrr the object. .

3. There are no adjustable parts In the pickup assembly. If it Is delectiv

replace the whole pickup assembly

CAUTIO N:

USE OF CONTROLS. ADJUSTMENTS OR PERFORMANCE o
PROCEDURES HEREIN MAY RESULT IN HAZARDOU
RADIATION EXPOSURE.

DANGER

IF INTERLOCK FAILS OR IS DEFEATED, THE LASER LIGHT |
ABLE TO FUNCTION. THE LASER IS INVISIBLE. AVOID DIREC
EXPOSURE TO BEAM.