Technics SA 404 Service Manual

Page 2

I CONTENTS

LOCATION OF CONTROLS .................... 2, 3 TERMINAL GUIDE OF TRANSISTORS 81 IC ........... 16
DISASSEMBLY INSTRUCTIONS ................ 3 ~ 5 EXPLODED VIEW ......................... 17, 18
ALIGNMENT INSTRUCTIONS .................... 6 REPLACEMENT PARTS LIST

ALIGNMENT POINTS .......................... 7 (Cabinet, chassis & packing parts) ............... . 19
BLOCK DIAGRAM ............................ 8 REPLACEMENT PARTS LIST (Electric parts) ......... 19, 20
DIAL CORD INSTALLATION GUIDE ................ 9 SCHEMATIC DIAGRAM ..................... 21, 22
BLOCK DIAGRAM OF IC ..................... 9 ~11 REPLACEMENT PARTS LIST

PRINTED CIRCUIT BOARD WIRING VIEW
(FM/AM tuner and equalizer circuit board) ......... 12, 13

PRINTED CIRCUIT BOARD WIRING VIEW
(Tone, main amplifier, power supply and speaker
protection circuit board) ................... 14, 15

I LOCATION OF CONTROLS

Power

Head phones

Power display range selector--
(XO.1 .. X1 .. off)

Speakers
(remote .. main «main and remote)

Power level indicator

r-l

Left Right

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V \V

l

Bass -

Treble-
(Boost «off «filter) Low -

(Boost «off «filter) High-l

AM antenna

FM antenna (750)

FM antenna (300(2)

Ground

Phonoinput
Auxinput

, 0
a «fl.

"p-H-l-l-

Playback--

Rec out-

(Resistors & capacitors) ...................... 23,24

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- Balance

Rec outfi

-Tape 1
Playback -'

-Program indicator
Signal strength indicator
FM stereo indicator

Main speakers

-Tape 2

Tuning

Volume

FM muting/mode (on/FM auto »
off/FM mono)

Selector (AM 0 FM «phono «aux)
(Source «tape 2)-
(Source «tape 1)->

-Tape monitor

- Loudness (off «on)

~'--~\....

AC outlet

Remote speakers