Technics SECH 515 A Service Manual

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ORDER NO. AD931232302

ervice Manual

Amplifier
SE CH515A
Remote Control SL-CH515 ST-CH505 Colour
Transmitter
(K) . . . .Black Type
Areas
Suffix for
Model No. Area Colour
SB-CH515A RS-CH505 SE-CH515A SB~CH515A (E) Europe
(EB) Great Britain (K)
EG cl l l
Because of unique interconnecting cables, ( ) Germany an my
when a component requires service, send Etystem: SC-CH515
or bring in the entire system.
Specifications
Power output I General
DlN 1 kHz, THD 1%, both channel driven Power consumption 170 W
2X50 W (60) Power supply
Total harmonic distortion For (E) (EG) areas 230 V, AC 50/60 Hz
Rated power at 1 kHz 1% (60) For (EB) area 280 V~240 V, AC 50/60 Hz

Half power at 1 kHz

0.09% (69)

Dimensions (WXHXD) 270x118.5><336 mm

Load impedance Weight 4.4 kg
MAIN 6~SQ
SURROUND SQ Notes:
SIN (rated power) 84 dB 1. Weights and dimensions shown are approximate.
Input M10; 6000, Q52 2. Design and specifications are subject to change
Output HEADPHONE; 32:2, $3.5 without notice
8. Total harmonic distortion is measured by the
digital spectrum analyzer.
System Tuner Compact disc player Amplifier Cassette deck Speakers
SC-CH515 ST-CHSOS SL-CH515 SE-CH515A RS-CH505 SB-CH515A

Technics

Made in PAES

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7 SE-CH515A

l Contents
Page Page
tBEFORE REPAIR .................................... 2 OSCHEMATIC DIAGRAM ........................... 15~19
CPROTECTION CIRCUITRY ............................ 2 OPRINTED CIRCUIT BOARD DIAGRAM ............... 20~22
'ACCESSORIES ..................................... 2 OWIRING CONNECTION DIAGRAM ...................... 22
OCAUTION FOR AC MAlNS LEAD . . 3 UBLOCK DIAGRAM . . .23
oSTACKlNG THE COMPONENTS ........................ 4 OFUNCTION OF IC TERMINALS ......................... 24
ICONNECTIONS .................................... 5~8 OREPLACEMENT PARTS LIST ...................... 25~28
CLOCATION OF CONTROLS . . . 8 OCABINET PARTS LOCATION . ..... 29
OTROUBLESHOOTING GUIDE ........................ 9, 10 IPACKAGING .................................... 30, 31
IDISASSEMBLY INSTRUCTIONS .................... 11N14
l Before Repair
(1) Turn off the power supply. Using a 100, 10 W resistor, connect both ends of power supply capacitors (C701, C702) in order to discharge the
voltage.
(2) Before turning the power supply on, after completion of repair, slowly apply the primary voltage by using a power supply voltage controller to
make sure that the consumed current at 50/60 Hz in NO SIGNAL mode should be shown below with respect to supply voltage 230 V~24O V.
Power supply voltage AC 230 V AC 240 V
Consumed current 50 Hz 80~180 mA 80~180 mA
I Protection Circuitry
The protection circuitry may have operated it either of the following conditions is noticed:
No sound is heard when the power is switched 0N,
Sound stops during a performance. _
The functions of this circuitry is to prevent circuitry damage it, for example, the positive and negative speaker connection wires are shorted, or it
speaker systems with an impedance less than the indicated rated impedance of this unit are used.
If this occurs, follow the procedure outilined below:
1. Switch OFF the power.
2 Determine the cause of the problem and correct it.
3. Switch ON the power once again.
Note:
When the protection circuitry functions, the unit will not operate unless the power is first switched OFF and then ON again.
I Accessories
AC power supply cord ................ 1 pc. Flat cable (Long) .................... 1 pc. Speaker cords ..................... 2 pcs.
(VJA0733) (RJAOO19-2K) (HEX051 1) (REE0499)
...for (EB) area ...for (E) (E6) areas
(RFtelrnégzl-cogmltsansmitter ............ 1 pc. gagiggzezgsmn) ................... 1 pc. AM loop antenna (RSA0010) IIIIIIIIII 1 pc.
Antenna holder (RMN0244) . .1 pc.
Screw (XT N3+10AFZ) ............... 1 pc.
FM indoor antenna .................. 1 pc. I 2 4
Remote control batteries ............. 2 pcs. (RSAOOO7)
(UM-4, AAA, 903) Attachment plug .................... 1 pc.

Note: These are available on sale route.

(SJPQOOQ)...tor (EB) area

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