Technics RS 9900 US Service Manual

Page 1

DU DDLBY SYLSLEMI

RS-9900U MECHANISM SERIES

Service Manual

ORDER NO. ARD-77070 76C

Cassette Deck

RS-QQOOUS

High Fidelity Stereo Cassette System with Closed-Loop,

Double-Capstan, 3-Motor

Specifications (Catalog specifications for sales)

H3329! (Gilt; 10'77131'.

V1010

Tl fiv':.{ 3:1")..(3'11 .
RQCCCL'IEE; 7."52'19'W
ripe SIC-)CC

155173.33 H j L...:
:CCCLCCCLr' '88:)an

Signal-1111'

1051-3 1&1 0

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1":
1...;

.
._r'

HIE? Irkifia

I.
131171.

VJTSJT

Thchnics

byPanasonic

AC; 2? CI \1' E31Tfl1_.-f~ff,-f) 1-1:.
Power consurmt on 45W
.3' "otor cosec- loop couple-capstan system
I .
1-03. DC a lsnless capstan 1110101
C C or reel table drive

.5 11, ':'J'ele§)s TlOiO'
-'l-'r11;:1.;_ ) " o ucordrng and playlwack

, VVRMS)
C10 ape 2'13 -- 2C SOC 11?
Karin: , ape 2518 COCH: (7.1731
10 :11 NR 11 o (.18 (a pox-e Ek-lzl
1.)0'12 NR on :1 CB

1SI;{~'11~31 eve? namnum reco'dlng level}

. 1: 1. 1 C10 '1:)-"'1;al tape 16:) nWazm 333 Hz)

Ms. aerissf 1', f. 25311'V'aop cabie micropnone
11 1; :11;-';1t1_111 1:3 '1 EUR ~7OK£2

1,1110; sens 1-;- 13.11 11V inpu' 11"1peczacce 81511K$£

71:11 5111355111111}- OCPI'VVY "2"111 1113811111118 185 0K1!

1.111e 13111171111 ever {1113\1 oad 1111081113nce471<83

(fife?!
.T _ ,1 \ ,
six-01,511 out 0.1.»
7 K33 OWE"

:11: level 3 4? V. load impedance

SIS-81:11 I:

81lC'lS are 1511518121

Gut-poi

F:ast forward and
rewind tune:

P1fcn control:
Calibration control:

Head
Dimensions
Weéght .

Panasonic Company
Division of Matsushita Electric
Corporation of America
One Panasonic Way. Secaucus.
New Jersey 07094

Drive, Separate Amplifier Unit

Aux; out put level 0 42Vloac1moeoarce '47 M:
over

Headphones: outpct level O~ 900 mvlrrrpeca'ice
812 -~ 12512

Approx 7C seconds mitt C 600 cassette la e

Tape speec .ariasle range 11. 90 at p avaa: n:

Play cal; piayback level variaalc range :: 3118 a:
333 Hz

Rec cal recording efvel variable range 1. 1; 1 .E. a.
1 OOOHz

Bias; bias Current variable ra1ge -- C7 -- 1 1? 'C;
(1000 re: standa d tape)

EQ; recording equalizer variable "ange 35133113 at
10.000 Hz

3-head system:

2-HDF neads or react rd "pla; back

16011393318th Snead lo r erasi re
Transport on .
19"(\'\"1-?'1 7-5 8'11-1):~< 14 1-4'11111

Arrlplilier 11-11:.

1971-11) mfg-778111} ~ 14-3361 (Dl
Transport on: ' .3- lbs.
Amplifier 111ml C 2-7'8l%>s

to change 1111111011. notice

Matsushita Electric of Hawaii. Inc
320 Waiakamilo Road. Honolulu.
Hawaii 96817

Page 2

LOCATION OF CONTROLS
AND COMPONENTS

"l; Power indication lariio
72, Morlltor switch
'3 Mcrophooe attenuator swltco
4 Taoe selector
log, OSClllt3lQr' switch
1'6)- Dolbl, mouse-'edoctloo swrtcl'r
Multiplex lilter sw:tcts
18;: Bias calibration control s;:re~.vs
l9} Equalization calioratiori (TiOrWtrl screws
10? Dolby FM catibrat or: contra) sizzrews
ill} OSClllatlon calibration control screws
'32) Peak meters
13;? Record indicator amp
l4; Preset marks
:13. Line-input level CO'ttrO
06 Output level control
'le Microphonegauxileary vipot sevel ccmt'ot
4,83 Pitch control
5.1.9,» Tape time
20 Tape COlmter and reset button.
'2l Pause buttow
22 Fast forward bottom
.3 . . , . . , _ . _ . 3 , \ 23 Playback button
31 30. 29 28, 27 26, 25, 24, 23 22, 24 Stop putton
42. (43/ 4'41 '45; 25 Rewrrld button
26 Record option
"27 Memory swrtclt
,28' Timer swrtclt
'29. Head cover
30 Microohoneacks
'3l Auxiliary input jack tlelt). Anxmary outpit Jam lrlgri'
.32 Power sthch
33 Power sllCllC'aIQF lamp
34 Cassette door
35 Eject button
36' Headphones Jack
37. Headphones level control
381 Record calibration control screws
39 Playback calloratlm control screws
.40 Var.aole,'pre-set oustipottow swrtct:
Al Varsable indicator lamp
.142" Line-output jacks
543 "Through out" Jacks
'44. Line-input jacks
"'45" 20-pin connection termrrlals
463 Groonc terminal
473 Remote control comection socket
49: 148 6-Dlfl connection terminals
.49} Power cord

l 2, 3,. 24,. 5f 6 7; $8,? '9 10; ii:

1 a?! 300v is the mile man a;:' DC! BY E..:':ll.).'.i.:".2l'

Page 33

ITEM MEASUREMENT & ADJUSTMENT

6.

Confirm that the measured value at REC-OUT,/TP7 tor L-CH. REGOUT/TPM tor
R-CH is +2i025 dB greater than the measured value (+8:025d8) in the above
step 5 when bet-ween FET GATE and GROUND (TPS and TP4 (Ground) for L-CH).
(TP12 and TP11 (Ground) for R-CH) 0t ENCODER is shorted.

Adjustment method

1 .

2.
3.

it the Dolby ENCODER circuit doesn't meet the above specifications. adjust the follow-
ing controls

Set VRSOI (L. R-CH) to maximum posrtion (turn to counter-clockwise direction (; l).
Adjust VR503 (L. R-CH) to obtain an output level at REC-OUTJTP7 tor L-CH. TPM
tor R-CH which is + lOdB greater than the "OUT" posnion of S3 Dolby NR switch

. Adjust VR501 (L, R-CH) to Obtain an output level at RECOUT/TP7 for L-CH, TPM

tor RoCH which is «~2dB lower than that obtained in step 3 above.
(See adjustment parts location on page 44.)

30