Akai DT 100 DT 200 Service Manual

Page 2

DT-100

DT-200

AUDIO-TIMER

DT -100
MODEL DT-ZOO

TABLE OF CONTENTS

SECTION I SERVICE MANUAL ............ 3
SECTION 2 PARTS LIST .................. . 19
SECTION 3 SCHEMATIC DIAGRAM ......... .. 28

Page 7

2. MODEL DT-200

FD

.mflggi-WNT

mum mun

POWER MODE SELECTOR

FUNCTION SELECTOR KEYS

PROGRAM MEMORY SELECTOR KEYS (1 to 4)
DAY SET KEY

DIMMEH SENSOR (Auko)

DIGITAL FL DISPLAY

AC OUTLET 1ND|CATOR

ONE HOUR PLAY INDICATOR

AM/PM PROGRAMING KEYS (No! on some modeis)
PROGRAMING KEYS

, AM/PM INDICATORS (Not on some models)
. ONE HOUR PLAY KEY

C LEAR KEY

T TURN OFF KEY

TURN ON KEY
UNSWITCHED AC OUTLET (Not on some medals)

. SWITCHED AC OUTLETS
T VOLTAGE SELECTOR (No: on some models)

19.

20.

21.

:nnlmu mum:
» u "mu-1
umllmslhu mm

Fig. 2 Controls

12 HOUR/24 HOUR DISPLAY SELECTOR

(Not on some models)

AC POWER CORD (Some models are equipped with an
AC Inlet instead of an AC cord. Connect wih an ap-
propriate power and)

AC OUTLETS (Switched)

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V. ADJUSTMENT

Dr- too I DT-zco

TP (Dr-too)

wimm
lesseeoo to
16566.99? #5

FREQ, COUNTER

flflflflflfl

wannabe)
(ca PW. -1

MAW Pic BOARD

L" DDD DD

FUNCTION : PERJoD

Fig. 7 Instrument Connections

FRONT SIDE MAIN RC BOARD

Pea-4

Fig. 5 Main [C Board PCB-4 (DT-IOO)

as I:

499»st an
hymLuscs fl

FRONT SIDE MAlN P.c BOARD
PCB-(2

Fig. 6 Main P.C Board PCB-L2 (DT-200)

REFERENCE PERIOD SIGNAL MICROADJUST~
MENT (Refer to Fig. 5 to 7.) Connect the frequency counter
to TP (DTJOO), TPZ (Ur-200) and pin ® of 1C2, set
function to period.

Adjust the trimmer capacitor C4 so that frequency counter
reads within 16666600 to 16666.699 ,us.

Quick continuation of the timer setting is possible by short

circuiting TPls (DT-ZOO only), as this will cause the set's

time count to become 60 times as large, changing the digit

that would otherwise be for minutes into seconds, and

that for hours into minutes.

NOTE: Disconnect the power cord before short (or release).
TPls.

ll

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MEMO

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