Optonica rt 3838 service manual

Page 1

RT-3838HA
Rnasssno

0

" DDLBY SYSTEMIL

I Dolby and the DocjbleD svnIQoIs are [race mark
cI Dolby Laboratories.
» Manuiaw C! under IIcerIce from DoIby Laboratories

MODEL
RT-3838HA
(Silver Panel)

RT-3838HD
(Black Panel). '

'ose specnied be used. '_

In the interests of user- -safeiy the set should be restored toyits original condition and only parts identical toL

L SPECIFICATIONS

,4 track 2 hanneI stereo cassette tape
recorcte player deck with built- In

lLSi (Large Scale Integrated Circuit)
54C (lntegrated Circuit)
L 52-Transistor
~294Diode
'2ALED (Light Emitting'Diode)
Widthi 442mm (17.3/8)
Height: 144 mm (541/16)
Depth: 357 mm AH/'16)
9 kg ( 9 lbs)
PhiIips standard compact cassette tape
, 015% (DIN 45 500)
' 30 ~ 13,000 Hz (DIN 45500)
(Use of normaidape)
- 30 ~ 16,000 Hz (DIN 45 500)

S/N raIIof.

(Use of Fe- Cr tape). _3
3Q ~ 15;L000 HZL (DIN 4'5 500)
,(Use of MAXELL UDX II tape) _
Better than SQdB (eightedl ,.or
normal Tape at LINE IN, without
_ Dolby Noise ReductiQn
Dolby NR effect: l0 dB (at ever BkHz)
input sensitivityand Input Impedance:_ ' , _ '
Microphone 0.2mv (6.8kbh'rrisl
Line * - 50 mV (54k ohms)
Record/Playback Socket 0.1mV (1th SI
Output Llevel and loaded impedance: ~ L L

Headphones L89,mV ( 0
L _ , , 7 Bohm V ,
rLlne - 1 1775mv (210 W
L 50Kohms

7,75mv1("0~ ,v

Recotd/Plavback Socket
_ I , 50k ohms

SHARP CORPORATION OSAKA, JAPAN

Page 2

BEMOVAL OF THE BOTTLOMPLATE, (See Figure 6)

TAMI we 391 am am; removefhh-fhmo é {he 0th 9km: H Is then possum: no dxztam 1hr:
imflmn plan"

Figure 6'

REMOVAL OF THE FRONT PANEL, VU METER AND CONTROL UNIT (See' Figure 7 to 14)

'Figure?

PM! out The seven Knobs ia: 1013 ~77 His power m
kmlb {M}: ether swrch Knob {x13 fine rscmd a" ;'

tonnes - {:42}, zmcrophme $50.! Rave} cantm
1 mobs (x23 and output mp. comm? Mob-1x33.
V' Remwe We we 5: rte from pa 9! QM"
i them pass Me T " mm! nzi

'WS reaming the V1; meter M

than possmn
:Huminatwom and hem he

Figure 8