Technics SECH 510 Service Manual

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ORDER NO. AD940719708

Service Manual

Amplifier

SB-CH510A

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SB-CH510A

SL-CH510 ST-CH51O

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Remote Control RS-CH510
Transmitter

SE-CH510

Because of unique interconnecting cables,
when a component requires service, send
or bring in the entire system.

Amplifier
Colour
(K) ................ Black Type

Areas
Suffix for Area Colour
Model No.

(E) Europe

(EB) Great Britain

(EG) Germany and ltaly

(K)

Asia, Latin America,
(GC) Middle Near East and
Africa

(GN) Oceania

System: SC-CH510

Specrficatlons
Power output I General
DIN 1 kHz, THD 1%, both channel driven 2 X 35 W (69) Power consumption 128 W
Total harmonic distortion Power supply
Rated power at 1 kHz 1% (59) For (E) and (EG) areas 50 Hz/60 Hz AC. 230 V
Half power at 1 kHz 009% (60) For (EB) and (GN) areas 50 Hz/GO HZ AC. 230 V - 240 V
Load impedance .For (ac) area only 50 Hz/eo Hz Ac. 110 W127 V/220 V/24ov
MAIN 60 Dimensions (Wx Hx D) 270x118.5><339c5 mm
SIN (rated power) Weight
MAIN 84 dB For (E), (EB), (EG) and (GN) areas 4.2 kg
Frequency response For (GO) area only 44 kg
MAIN 40 Hz a 30 kHZ Notes:
1. Specifications are subject to change without notice.
Weight and dimensions are approximate.
2. Total harmonic distortion is measured by the digital spectrum
analyzer.
System Tuner/sound processor Compact disc player Amplifier Cassette Deck Speakers
SC-CH510 ST-CH510 SL-CH51 0 SE-CH510 RS-CH510 I; SB-CH510A

Technics®

*: For (E), (E6), (EB) areas ........ Made in PAES
For (60), (GN) areas .....,.......Made in NABEL

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SE H510

I Contents Page

0 Before Repair ....................................................................................
0 Protection Circuitry ..........
I Caution for AC Mains Lead.
O Accessorie
O Stacking the Components
0 Connections ................
0 Location of Controls .........................
0 Power Source ON/OFF of This Unit SE-CH510 .

N

0 Operation Check and

Main Component Replacement Procedures
0 Schematic Diagram ..............
0 Printed Circuit Board Diagram.
OWiring Connection Diagram .
0 Block Diagram ................
0 Replacement Parts List .
I Cabinet Parts Location

0 Packaging ..

I Before Repair

(1) Turn off the power supply. Using a 10 S2, 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 1 1O V/127 V/220 V/240 V.

Power supply voltage AC 230 V AC 240 v AC 110~127 v AC 220~24o v

Consumed current 50HZ 50~150 mA 50~150 mA 100~320 mA 50~160 mA

I Protection Circuitry

The protection circuitry may have operated if either of the following conditions is noticed:
* No sound is heard when the power is switched ON.
*Sound stops during a performance.
The functions of this circuitry is to prevent circuitw damage if. for example. the positive and negative speaker connection wires are shorted". or if
speaker systems with an impedance less than the indicated rated impedance ofthis unit are used.
if this occurs. follow the procedure outlined 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.

For aras except (E) (EB) (EG) (GN)
CAUTION:

The AC voltage differs according to the area.

Be sure to set the proper voltage in your area befor use.