Technics RSDC 8 Service Manual

Page 1

ORDER NO. ADS40307SCZ

Service Manual

DIGITAL

C'CC

COMPACT CASSETTE

AR1 D MECHANISM SERIES

SPECIFICATIONS

I Digital Recording/Playback
Tape recording system Stationary head type :CC
Sampling trequencies
(Analog input recording) 44 ' «F:
(PIaybacleigital Input recording
48 kHz, 44,1 kHz. 32 <
(selected automat
No. of quantizlng bits 1630i
Audio coding system
No. ot channels Z-channel -(
Frequency response
(44.1 kHz sampling frequency) to Hz-20 kHz (:
(48 kHz sampling lrequency) 10 Hz-22 kHz (2
(32 kHz sampling frequency) 10 Hz- 14 5 kHz (2
Total harmonic distortion

I
N

(Playback) 0.007% or less (1 kHz. 215*

(Recording/playback) 0,009% or less (1 kHz 2 38
Dynamic range

(Playback) 95 dB or more (A- weighted)

(Recording/playback) 90 am or more (A- -lwe 9 red:
SIN

(Playback) 95 dB or more (A- weigrteci

(Recording/playback) 90 dB or more (A- -wei<_:r~tec=

Channel separation
(Playback) 95 dB or more (1 (Hit
(Recordinglplayback) 80 dB or more (1 (H:

Wow and llutter Below measurable MT".

Technics

Digital Compact Cassette Deck

RS- D08

Colour
(Kin. Black Type

Area
Suffix for
Model No. Area Colour
(E) Europe.
(EB) Great Britain, (K)
(EG) Germany and Italy

*Dolby noise reduction manufactured under license
from Dolby Laboratories Licensing Corporation.
Dolby" and the double-D symbol are trade marks of
Dolby Laboratories Licensing Corporation.

I Analog Cassette Tape Playback

Deck system Analog compact cassette
Track system A-track. 2~cnannel (Stereo)
Frequency response (Dolby NR oil)
Normal 30 3-11-15 kHz (DIN)
cm; 30 Hz- 16 kHz (DIN)
Metal 30 HZ- l7 kHz (DIN)
SIN
(Signal level = 250 nwblm, ore, type tape)
NR oil 56 dB (A-weighted)
Dolby 8 NR on 65 dB (CClFl)
Dolby C NR on 74 dB (CCIR)
Wow and llutter 0,05% (WRMS)
102% (DIN)
I Terminals
Analog Input
Input sensitivity 100 mv
Input Impedance 47 k0
Analog output (ilxed)
Output level 500 mV (DOC - 12 dB)
Maximam output level 2 V (DOC 0 dB)
Output Impedance 1 kn

Headphones output

Maximum level 30 mw+30 mw

(32 0 load)

Load Impedance range 8-600 0
Digital Input Optical 2 input
(with select SW)

Digital output Optical

Page 2

» RS-DCB

I FRONT PANEL CONTROLS

1 4 6 3

No. Name Ref. page
3 Power STANDBY d) ION switch
(powm, STANDBY (b ION) 7

Press to switch the unit from on to standby mode or vice ver-
sa In standby mode, the unit is still consuming a small
amount at power.

Z STANDBY indicator (STANDBY) -
when the unit is connected to the AC mains supply, this in
dicator tights up in standby mode and goes out when the um,
iS turned On.

3) Dolby noise-reduction button
(DOLBY NR) 8

@ Reverse-mode selection button
(REVERSE MODE)

l

5) Recording input selection button

(INPUT SELECTOR) 13
@ Automatic marker writing button

(MARKER AUTO) 13
C7) Text mode selection button

(TEXT MODE) 10
3) Text scroll button (TEXT SCROLL) 10
® Cassette holder 7

@ Counter mode selection button
(COUNTER MODE) 11

® Counter reset button
(COUNTER RESET) II

® End search button (END SEARCH) 15

No. Name Ref. page
:3, Pause button (ll PAUSE) 7, 14
l3 Automatic-record-muting button

(OAUTO REC MUTE) 16
£5 Record button/indicator (O REC) 13
E Rewinditast-iorward buttons (REWIFF) 9
1"; Remote control signal sensor

(SENSOR) -
8 Timer switch (TIMER) 25
jg Headphones jack (PHONES) 9
2E Headphone level adjustment control

(PHONES LEVEL) 9
Z; Recording-balance control (BALANCE) 15
2 Recordingtlevel control (REC LEVEL) 15
Z; Sampling frequency indicators

(SAMPLING FREQUENCY) 16'
E Open/close button (A OPEN/CLOSE) 7
2:5» Tape side selection button

(4 > DIRECTION) 9
:6 Stop button (I) 7, 14
fl Playback buttonlindicator (b) 7, 13

11

2:8 Skip/TPS buttons (TPSIR.SKIPIF.SKIP)

Page 52

RS-DCB RS-DCB

I SCHEMATIC DIAGRAM 1 l 2 P 3 . 4 I 5 . 6 l 7
(Parts list on pages 96~103.)

(This schematic diagram may be modified at any .IiIEéEPgIgNCESIT n OPERATION CIRCU n.
time with the development of new technology.)
0783.764 |C702 078L782
No.3. m Esmzsosntt 355,7:th figaistosrrn
. A U -|15V F917!!!
- $291 : Cassette lid open detector switch. A JKTOI L W W E 1 1:13:13;
- 5292 : Cassette ild close detector switch. "WNW WW 0393 "702/:ng gm 3 113' 5.7321 a A m
- S701 : Cassette lid open/close switch Afa 3-K?) pr i the H as 4 i [ .I- 3:: . mai'V-u . L," m c'itrii'"
(A OPEN/CLOSE). Jim-fifty 1 e ,5 77;; r15 W "3:5 fig :3"); anew,
- S702 : Stop switch (l). ;6 1 - pg , mu: m-
- $703 : Fast-forward switch (FF). :21 [ f WWW -, m
- S704 : Rewind switch (REW). - ; t»; é §§§ . as our
- S705, 706: Skip/TPS switches. ;x K g; r g 2 g s at»
[8705: F. SKIPITPS, S706: R. SKIP/TPS] $3.51 :2 m? gs; W W cm a g 1 it: iii Zetafrm
. . iK l6V22 n: r G IENIOZI
S707 . Playback switch (>). (SENSOR) Issue 0782 7 I: J_-tl2 Know
0 S708 : Tape side selection switch (4} DIRECTION). " i; 0 °" ° 7
- S709 : Pause switch (II PAUSE).
'5710 : Automatic-record-muting switch(OAUTOREC B 5;: 71,5; 79:3 IL fif' 076! REV A 6 1:ng
UN42 I lTA .
MUTE). W o
. - r.
- S711 . Rec pause swrtch (II PAUSE). E J r3520 In."

«tbtPANELl (0.305,
0 LED srsv on m- as

_i_
can

t-o
_z_

_i_
)-a

573

( oomv NR)
5753

imnxsa Aumi

- S721 : End search switch (END SEARCH).
- S722 : Counter reset switch (COUNTER RESET).
~ S723 : Counter mode selector switch (COUNTER

5135
iFIEV tacos)

5732 (INPUT

:J

sELEc
[-0
s
(P

MODE).
. S731 : Power STANDBY (I; ION" switch (POWER, ' a F'- CIRCUIT
STANDBY (b ION)' ruoi insLoiss-Fi
- S732 : Recording input selection switch (lNPUT
SELECTOR). n nisvttv
0 S733 : Automatic marker writing switch (MARKER
AUTO).
. S734 : Dolby noise-reduction switch (DOLBY NR). C §
- S735 : Reverse-mode selection (REVERSE MODE). ~3§
' S736 : Text mode selection (TEXT MODE). 555 dang
- S737 : Text scroll switch (TEXT SCROLL). \
' S738 : Timer switch (TIMER). Z702
- $971 : Mode detection switch in off" position. isgiggo A a t: p F F G n i .i x L M N a P c
0 $972 : Half detection swltch in of! position. .. tr 1 7 i 070l-703
cssra : ATS (oroz) detection switch in off" position. sfgfigmm
- $914 : Reverse rec. Inhibit switch In off" position.
- $975 : Forward rec. inhibit switch in off" position. 073L732
- $976 : ATS (Metal) detection switch in off" position. UN 42llTA
- $981~983: DCC Tape length (LENGTH 2~0) detection 5, L V
switch. tom:
- $984 : DCC/ACC Cassette halt detection switch in D -o- o
0" position. (OAUTO 3118:: if:
-The voltage value and waveforms are the reference _a-~ m :-
voitage of this unit measured by DC electronic voltmeter I "11$? {6 m"
(high impedance) and oscilloscope on the basis of Lg-L K; issue)
chassis. 57° 5-:
Accordingly, there may arise some error in voltage - 2:330 K
values and waveforms depending upon the internal f7: E:
impedance of the tester or the measuring unlt. H+
No mark . .DCC playback 5705 g:
( .Voltage values at Dec record mode. if it: 1
< .Voitage values at A60 playback mode. "T: -°sros 2s J T
o Important safety notice: E A 5" 5" IC7OI - K
Components identified by A mark have special T2194 gx ESQ; wsfififcfifgfifl g; m fin-f _ L)
characteristics important for safety. Furthermore, [if :3 lemma, LEDW FL mm: _W ,
special parts which have purposes of fire-retardant 2, :x 572: ¥ ., v 75v 35f
(resistors), high-quality sound (capacitors), law-noise if; :5 '31" 5 WOW iiiiijiiiL \Hommnm I :31 .270]
(resistors), etc. are used as occation calls. When H m 0 N e m vowel: Y-Zom . i -z FLZ
repiacing any of components be sure to use only 517.0)? 3! Ltsaééén 3: c Wei 5 T "5 1W? ! AVPP
, , i . .. K __ it c 93 mm m A s save on
manufacturers speCiiied parts shown in the parts list. t-eJ _ _ e 003 a CLX our W K a 5 m? we
0The supply part number is described alone in the r; opens/Ram 1: .thssZ'acm I: F E c s 7,
_i_ K ._I_ k D D replacement parts. 1-6 W E I __
SV Y
Part No. Production Part No. Supply Part No. F r: in:
I0309 M5218AFPE3 M5218FPE2 a, 3%) :éf- ¥A . spam rééc'fin lam"
icso4 $81350HGT $81350HG F 39523.3" xI 5: egg. A g A 3:2,)??? $11325.
ic702 M5218AL M5218L .ss'éfm m" g g : :gw
ICP601 SRUN25T SRUN25 ;, 5'; w , _ . 2:13 m2
"_ K' 29 «69 3°.';, F sunny:
27m RCDHC-278»E ncoHc-27a 4 5% . 3%,; :31 521% 32' 31:.
- --/ ----: Positive voltage lines and - E W 5% ' "5
negative voltage lines. §§ ' Q '77 r- emu
«is : DCC (Playback) signal lines. '5 1 _, 7
fl : DCC (Record) signal lines. 1 f

22> :ACC (Playback) signal lines.
7 57 .e
_. 58 _

Page 105

TROUBLESHOOTING 1 DCC Playback System Troubleshooting

Test Polht Waveform
le Pln ®~®, ©~®
EVE MONITOR
® ® (9
Hanna.
m w m 0 no Icm
c evmm. f2; PLAY/BACK wrrn musxc SIGNAL CH 1; o,sv A; 1mg
» RDMUX V : 21ml I 0
is x : new:
K330) PHI 0 RDSVNC (C" 1)
loam m o RDMUX (cm 2) IC314 @
SERVE? © 5v
PROCESSOR
(-94
PLAY] BACK W|TH were sremu. 01 8 us
CH1YZD.ZVK IO
X C 0.2;)!
C! V 1 50111)! X 0
Presumable x 1"
Trouble Checking Procedure Defect. Part mm p." 05m (cm)
«can: Pm 0 sum: (cu 2) IC301.MSPEED
-No DCC Sound is-> Play a DCC fape '
heard. .1 ;- + (-
(ACC 0.K.) N9 change (Ten digits all 1) T T
Read me a" error rate in wrfh 9821 Confirm display of YES © ® 5V
Service Mode No. 1. Service Mode No. 2 Head~ "31 !0301
ICSOG defective.
1 (Error rate changes.) (Some out of ten digixs are a.) P Y, H mm we 5 G L 20 us
LA BA | NA
.Sound skips-> AZIMUTH Adjustment 5mm Tis changing
(DRough adjustmenf is Service Mode No. 2. Refer 0 P'131132 u.
d. . - . . .
®Aocurafe a lustment In Servrce Mode No 1 Test Pomr {$3 2:23 $3112 562:1 u |c302 @ pm
1, NO F5258
Waveform ® appears ? No (D
(REED/WRITE PCB) Head fem"?-
mumgvswsme © (D
an - In
l YES I NO ® p
Waveform (3 appears '.7 (Mam PCB) | 01 defective.
1' YES PLAY/BACK WITH MUSIC SIGNAL F = 12.288MHZ
Y 3 0.2Vx In
Waveform a are ? Mai PCB N0 © X I 02"
O we ( n ) IC301 defective .
Waveform ®appears 7 (Mam PCB) ® rcaoe defective. "3302 Pm
1 YES IC303®SDAH F8258
No CD) -
Waveform ® appears ? (Main PCB) IC302 defective. T
Waveform ® appears '2 (Main PCB) .._l G G) 5v @ 4V
MES © H i
Waveform :3 rs ? Main PCB L ICSOS defective.
[ ® ppea ( ) I 0.35 s F = 12.288MHz
has (9
. I IC401\ @463
I Waveform ® appears ? (Mam PCB) | defective.
) YES ©
f IC30L I 31
[ Waveform ©appears 7 (Mam PCB) f d elective? 4

_125__ ~126"