Technics SEA 70 Service Manual

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ORDER NO. HAD8606585A4

Service Manual

Stereo DC Power Amplifiero

SE- A705

Color

(K)...B|ack Type

Color Areas

(K) [PA]....Far East PX.
(K) [PE].,..European Military.

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Please use this manual together with the service manual tor Model No. SE-ASMKZ, Order No. HADB403273101.
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SPECIFICATIONS
(IHF 78)
I AMPLIFIER SECTION input sensitivity 90 mV (1V, IHF '66)
S/N (IHF, A) 102 dB (121 dB. iHF 66)
Rated minimum sine wave HMS power output Resident hum and noise 0.13 mv
20 Hz~20 kHz both channels driven Input Impedance 47 kilohms
0.002% Oa' harmonic distortion Low frequency damping tactor 100 (8 ohms)
160W per channel (8 ohms) L d_ d 50 (4 Ohms?
20 Hz~20 kHz both channels driven °a dzwofgcgmom 4~16 ohms
0.002% total harmonic distortion MAIN and REMOTE s~16 ohms

160W per channel (4 ohms)
1 kHz continuous power output
both channels driven
0.002% total harmonic distortion
160W per channel (8 ohms)
0.002% total harmonic distortion
160W per channel (4 ohms)
1.5 dB (8 ohms)
3.6 dB (4 ohms)

Dynamic headroom

Total harmonic distortion
rated power at 20 Hz~20 kHz 0.002% (8 ohms/4 ohms)
halt power at 20 Hz~20 kHz 0.001% (8 ohms)
hall power at 1 kHz 0.0005% (8 ohms)
Power bandwidth
both channels driven. 73 dB T.H.D. 0.01%
5 Hz~100 kHz (8 ohms)
unmeasurabiy smalt
0.002% (8 ohms)

Transient intermoduiatlon distortion
SMPTE intermodulation distortion
Frequency response
DC~20 kHz (+0 (18. *0.1 dB)
DC~150 kHz ()0 dB, -3 dB)

Technics

Matsushitl Electric Trading 00., Ltd.
PO. Box 238, Central Osaka Japan

Meter
reading range 0,0001W~400W
*60 dB~+ 4 dB
(logarithmic compression)
lrequency response (reading accuracy)
20 Hz~20 kHz :2 dB (more than >~50 dB)

20 Hz~20 kHz 3.3 08 (less than *50 dB)
I GENERAL

Power consumption 980W
Power supply AC 110V/i20V/220V/240V, 50 Hz/GO HZ
Dimensions (WXHXD) 476 X 178 X 416 mm
(18-23/32" X 7" X 16'3/8)

Weight 20.4 kg
(44.88 lb.)

Note:
Total harmonic distortion is measured by the digital spectrum
analyzer (HP. 3045 system).

Specifications are subject to change without notice tor further
improvement.
Weights and dimensions shown are approximate.

Panasonic Tokyo Oilice
Matsushlta Electric Trading 00.. Ltdt
6th Floor, Worm Trade Center Bldg,
No, 4-1, Hamamatsu-cho 2~Chome. Minato~ku,
Tokyo 105, Japan

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I LOCATION OF CONTRO

- Rear panel Dc
Input selector { 1 }--

LS

fi-Maln speakers
R L

NORMAL I I
Input level controls-l-l
R L + - - +
O O
O O
Q _J
R L + _ _ + Voltage selector
(110V H120V 4-» 220V (-t 240V)

Input terminals

I | AC outlet (unswltchsd 50W MAX)

R L
;I-Remote speakers

I BEFORE REPAIR AND ADJUSTMENT

1. Turn off the power, Discharge both power supply 2. After completion of repair. slowly apply the primary
capacitors (0401, 403, 402, 404, 8200118 through a voltage by using a varlac to avoid over current.
10!) SW resistor to ground. Do not short between Current consumption at 50Hz in no signal mode
C401. 403 and C402. 403- It may damage the should by shown with respect to supply voltage
capacitors. 110VI1 20Vl220VI240 V.

Power supply voltage

110V 120V 220V 240V

Consumed current 50/60Hz 0.41~0.93A 0.37~0.84A 0.21~0.46A. 0.19~0.44A

CHANGE

I CHANGE OF THE REPLACEMENT PARTS LIST

NM": ' Please U39 "5 part WWW! for P8715 orders. characteristics important lor saleiy. When replacing
' Important salety "ONCE any at these components use only manufacturers
Components identified by A mark have special specified parts.
change at Paris No.
Hot, No. Part Name A Description
ssmxuiii) # SE-ATtHPA, PE)
TRANSFORMERS
T501 A SLrsssa sussro Power Source
7502 A SLT5L178 ensure-1 Power Source
METER
| ssmevr ] ssmss ] Power Meter
FUSES
F1 A xaAiFeouuu xsazcamno 250v, 4A
F2 A xaazmnutoo xaAzmorm 350v, 4A
F3 A xaAzoosTRo 250v, 315nm (Addition)
SWITCH
$601 A | _ essence | Voltage Selector (Addition)
RESISTORS
R407, 408A ERDZSFJzaz 2.2 (Addition)
R804 ERDstJisi ERDS1FJ821 820
H705, 104 3105me enmnsei 560
CAPACITOR
(309,910 I - I ECKTii-iuaZF ] 0,033 (Addition)

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