Technics RSM 88 Service Manual

Page 1

ORDER NO. ARD-790806SC

ervice Manual

Cassette Deck

RS-M88

(Black Face)

Quartz-Locked Direct-Drive Cassette Deck Silver Face

with Metal Tape Recording Capability

This is the Serwce Manual for the

following areas.

IE] For All European areas except
United Kingdom.

[I] DOLBY SYSTEM I-~For United Kingdom.

f ' nl erie
RS-M85 MECHANISM SERIES Pro eSSIO a S 5

Specifications
Track systen 4rtrack Zrchanne stereo recordingi and playback Outpats LlNE output level 700mV load impedance
Tape speed 48cms 22k£2 over
Wow and ilutter O 035% (WRMSY i010% (DlN) HEADPHONE output level 140 mV load
Frequency response Metal tape 20 , 20,000 Hz impedance 892
3C *18000HZ (DlNl Rec PR connection 5P DIN type, input senSitivity O 25mV
307 717OOOl-lz :3dB impedance 4k£2
(O VU) 40 13000 Hz :3dB output level 700 mV. impedance 1 SW
CrOz, Fe-Cr taper 20718OOOHZ Bias requency 85km
30 18000 HZ (D'N) Motors 2 motor system
30 16900Hz i3dB Capstan, 1-quatz control phase-locked DC
Normal tape. 20 161100 HZ brushless directrdrive motor
30 ' 16000 HZ (Elm Reel table LDC coreless motor
30714000 HZ 3dB l-leads 27head system

Signalrtornoee ratio Dolby NR lli 69 dB (above 5kl-lz)
Dolby NR out 59 dB (Signal level max record
ing level FeCr/CrOr type tape)

1-SX (Sendust Extra) head for rec/playback
1rsendust/territe doublegap head for erasure
Power requirements AC 110/125220/240V 50760 Hz

Fast forward and Preset power vjltage 240V only for England

revvind time Approx 80 seconds With 060 cassette tape

lnouts MlC senSitivity O 25mv. applicable microphone POWEV consumption 35W
impedance 40032 10k£2 Dimensions 9 7Cm(H)><450cm(W)><403cm(D)
LlNE sensitivity 60 mV input impedance 68m Weight, 10 5kg

SpeCitications are subiect to change Without notice
* Dolby and the doubleD symbol are trademarks ot Dolby Laboratories

I I 'echnics Matsushita Electric Trading Co., Ltd.
PO, Box 288, Central Osaka Japan

Page 2

RS-M88

LOCATION OF CONTROLS
AND COMPONENTS

Tedlnrcsmaa

alumna-u um: Lllsl 0
llul Delirium
a , . .t

(D Power Switch (power)

® Eject Button (eject)

© Cassette Holder

® Tape Counter. Reset Button

6) FL (Fluorescent Level) Meters

© Output Level Control (output level)

® Input Level Controls (input level)

Headphones Jack (phones)

Record Button with Record Indication Lamp (record) (0)

Rewind Button (rewind) (<4)

@ Stop Button (stop) (I)

6}) Playback Button with Playback Indication Lamp (play) (b)

@ Fast-Forward Button (II) (b?)

® Pause Button with Pause Indication Lamp (pause) (ll)

@ BIas-Adlustment Control/Metal tape" selector (bias
ndlust) (pull Metal)

® Tape Selector (tape select)

@ Meter-Brighlness/Function Selector (meter)

@ Function Selector (Iunction)

Dolby Noise-Reduction Switch (Dolby NR)

@ Input Selector (Input select)

® Microphone Jacks (mic)

@ Line Output Jacks (LINE OUT) (R, L)

® Record/Playback Connection Socket (REC/PB)
@ Line Input Jacks (LINE IN) (R, L)

® Meler-Brightness-Adiustment Control (meter light)
® Power Cord

@ Voltage Selector (VOLTAGE SELECTOR)

@ Remote-Control Connector (REMOTE CONTROL)

Page 20

RS-M88

SCHEMATIC DIAGRAM

Power Supply Section

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e : TFhozaoa 2501684 I
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240% A I m II 5' K!
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E; IQ) I E
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z 3 r ""1
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3 MPH
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A : III I
2401 _ - r 3 l E
A If) . TR407 250389 I O :
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Has mm mm JV .{9 IVRR 5.7V
(EA ¢->-N-< 5 +4 : @ chc 5v TO MAIN comm
Ell ' W 5 £8 D413 é -o: @ :va Izv SECTION
: 2 '- 2© IVPR 20V
: g "has fi/D :SAFETY RESET
I 8. 3, : 6 .qu 7.5V
I 384 I! 3 25C1684 L_.U,
AC POWER : U; C: FEW
: f (I) : m
' I Q I ]~> TO MAIN AMP seem"
as l
I. _:_ J
r. ___________________________ .1
TR409 ZSC1684 I
l
I
a a .
I
Rw I NOTE:
TM? : 0 S401 ------- Power ON/OFF SWltCh,
(70 l 0 S402 ------- AC power voltage select switch.
ll 0 VR401 ------ Voltage (20V) adjustment VR.
ADMWQMWS I O ReSIstance are In ohms (0), 1/4 watt unless speCIerd otherwlse.
r-§.L - - I K:1,000Q.
_ g g 1 O CapaCIty are In mlcrolarads (uF) unless speCIerd OtheYWlSe.
:2 * E E I PZPICO'faYadS.
* f 9; § § I 0 All voltage values shown In curcwtry are under no sIgnal condltlon With
-4 5 5 c: : volume control at mInImum posmon.
_ :1 A A I For measurement. use VTVM.
_l a . I O A Indicates that only parts specified by the manufacturer be used for safety,
I
-*- WHO/2) I
RHOM'iUL/z :
I_ ______________ "I __________________ J