Technics SADV 290 EE Service Manual

Page 1

ADO30301OC8

Service Manual

Cassette Deck

RS-DV290EG
Colour
(S)..........Silver Type

Remote
Central
Transmitter

SL-EHSSO SH-EHSSH

sB-EHssu RS-DVZBD SA-EHSJU sB-EHsso

SPECIFICATIONS
system sc-EHsso
Sound Processor SH-EHSQO
Because of unique interconnecting cables. when a component Tuner/Amplifier SA-EHSSO
requires service, send or bring In the entire system. co Player SL-EHSSU
Cassema Deck Hs-szso
Front Speakers SB-EHSQG

* : Made in Singapore.

Specifications

Deck system: Stereo cassette deck SIN (Signal level = max recordlng level. TYPE 11 type tape):
Track system: 4 track, 2 channel NR ufl; 56 dB (A weighted)
Recording system: AC bias Dolby B NH on; 66 dB [A weighled]
Bias frequency: 100 kHz Input sensitivity and impedance:
Erasing system: AC erase REC (IN): 150 mV/ 23 kn
Heads: Output voltage and impedance:
Deck 1 PLAY (OUT); 280 mV/ 360 51
(Playback head); Permalloy head General
Deck 2 Dimensions (WXHXD): 294m l85x281 mm
(Recording/Playback headl: Fem-alloy head Mass: 21 k9
(Erasing head); Double gap Ierrlte head
Mom's; Notes: Specifications are subject to change Without notice
Deck 1, 2 Capslan drive; DC servD motor Mass and dimensions are approximate
Tape speed: 4.8 cm/s
Wow and flutter: 0:16 "/e (WHMSJ

Manufactured under license from Dolby Laboratories.

Fas' mam "d W'MI'MBS: App'ox'cjggcsgnggg: 'Dolby" and me acumen symbol are trademarks or Dolby
Frequency response (Dolby NR ofl): Emmy

TYPE I (NORMAL); 20 Hz - 16 kHz (DlN)

TYPE 1'1 (HIGH); 20 Hz - is kHz (DlN)

TYPE IV (METAL); 20 H2 716 kHz (DlN)

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A. WARNING

This service information is designed for experienced repair technicians only and is not designed for use by the general public.

It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced prolessional technicians Any attempt to service
or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.

Technics
1. Note

Refer to the service manual for Model No. SA-EH590EG, SA-EH590EP (Order No. AD0302008C8)
for information on Accessories and Packaging.

2. Location of Controls

3. Operation Checks and Component Replacement I

Procedures

- This section describes procedures for checking the operation of
the major printed circuit boards and replacing the main
components.

- For reassembly after operation checks or replacement, reverse the
respective procedures. Special reassembly procedures are
described only when required.

3.1. Checking for the main P.C.B.

Step 3)
emove the top cabinet.

9x4

- Check the main P.C.B. as shown above.

3.2. Checking for the operation P.C.B.
- Follow the (Step 1) - (Step 3) of item 3.1.

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Pin Terminal IIO Function
NO- Name
21 SH REG 0 Request signal output to
Sound Processor
22 NC(GND) - Not used, connected to GND
23 VR l Volume control signal input
JOGB
24 VR
JOGA
25 MIC DET l Microphone connecting
detect signal input (Not
used, connected to VDD )
26 HP SW l Headphone connecting
detect signal input
27 RDS l RDS clock signal input
CLK
28 RDS l RDS data signal input
DATA
29 QEMOCON l Remote control signal input
30- 8G-1G 0 Grid signal output
37
38- P1 -P8 0 Segment signal output
45
46 VDD 3 | Power supply terminal
47- P9-P12 0 Segment signal output
50
51 -VP l Power supply terminal
(Negative)
52- P13-P32 0 Segment signal output
71
72 VDD 4 l Power supply terminal
73- P33-P38 0 Segment signal output
78
79 REGINO - Not used, connected to GND
80 REG|N1
81 STANDBY 0 LED (STANDBY) drive
signal output
82 TIMER 0 LED (TIMER) drive signal
output
83 S.W.LED 0 LED (DIGITAL S.WOOFER)
drive signal output
84 LOUNGE - LED (LOUNGE) drive signal
output (Not used,
connected to GND)

Page 164

Hexagonal Step 6) .
wrench heart the gear With hexagonal
wrench into the hole.

Hexagonal
leP 7) wrench

otate the hexagonal wrench in the direction
of arrow and then open the disc tray iully.

Step 8)
elease the both claws, and
then draw the disc tray.

Disc tray

Claw

(Step 9)

With forcing the left guide

bar manually because the
leit guide bar interfers with
claw, draw the disc tray.

Disc tray