Technics SHE 4 Service Manual

Page 1

' The colors of this model include silver and black.
' The black type model is indicated by (K) in the
L Service Manual.

ORDER NO. HA083122693C9

Service Manual

Stereo Graphic Equalizer

SH-E4/(K)

[D].[EKl.[EVVl.iEBl,lEF],
[EGA],[EH],[XA],[XL],[Ei],[PC]

Areas

( N

' [D] is available in Scandinavia.

' [EK] is available in United Kingdom.

[EW] is available in Switzerland.

[E8] is available in Belgium.

" [EF] is available in France.

[EGA] is available in FR. Germany.

[EH] is available in Holland.

' [XA] is available in Southeast Asia, Oceania, Africa,
Middle Near East and Central South America.

' [XL] is available in Australia.

' [Ei] is available in Italy.

' [PC] is available in European Audio Club.

J
SPECificationS (Specifications are subject to change without notice for further improvement.)
(DIN 45 500) Band level controls : + 12 dB~ - 12 d8
Frequency response (12 elements continuously variable)
(center position) :5 Hz~ 100 kHz. -3 08 Center frequency :25 Hz. 40 Hz. 63 Hz. 100 Hz.
Maximum output 160 Hz, 250 Hz. 500 Hz. 1 kHz.
voltage :8Vi1 kHz,THD 0.01%) 2kHz.4kHz.8kHz.16kHz
Rated out ut volta e : 1 V
p 9 GENERAL
Rated total harmonic P l _ AC 240 V 50 Hz/60 Hz
distortion :o.005% (20 Hz~20 kHz) '9' PP V . - . - _
0 0030/ (1 kHz) (For United Kingdom and Australia)
. 0
Input sensitivity : 1 V AFC 220 V_ 50 HIZ/ESO HZ-
Slgnal-to-nolse ratio :95 dB (100 dB, IHF A) ( or continenta urope)
Maximum input AC 110 W120 V/220 V/240 V.
voltage : 8 V (1 kHz) 5: Hzio HZ-
lnput impedance :47 k0 ( 0" 9'5)
Gain :0:1 dB Power consumption : 9.5 W
Channel balance Dimensions
250 Hz~6300 Hz :tO.5dB (HXWXD) 250"<315><240 mm
Channel separation (1 -31x32" >< 12-13/32"x 9-7/16")
1 kHz :60 d8 Weight :2.0 kg (4.4 lb)
Page Page
SAFETY PRECATION .......................... 2 TERMINAL FUNCTION OF DIRECT
STANDARD CONNECTION METHOD WITH CONNECTOR ....................... 1O
DIRECT CONNECTORS ................. 2 TOTAL FREQUENCY RESPONSE ................... 10
LOCATION OF CONTROLS ....................... 3 BLOCK DIAGRAM ............................ 11
CONNECT WITH DIRECT CONNECTORS .............. 4 POWER CIRCUITS TO BE CHANGED AND THE AREAS ..... 12
CONNECT WITH PIN CORDS ...................... 5 SCHEMATIC DIAGRAM ..................... 13 ~ 16
DIRECT OPE RATIDN .......................... 5 REPLACEMENT PARTS LIST ...................... 17
DISASSEMBLY INSTRUCTIONS ................... 6, 7 EXPLDDED VIEWS ......................... 18, 19
CIRCUIT BOARDS AND WIRING RESISTORS & CAPACITORS ...................... 2O
CONNECTION DIAGRAM ............... 8, 9

Technics

Matsushita Electric Trading Co., Ltd.
PO. Box 228. Central Osaka Japan

Page 2

I SAFETY PRECAUTION

1. Before servicing, unplug the power cord to prevent an electric shock.

2. When replacing parts, use only manufacturer's recommended components for safety.

3. Check the condition of the power cord. Replace if wear or damage is evident.

4. After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.

5. Before returning the serviced equipment to the customer, be sure to make the following insulation resistance test to
prevent the customer from being exposed to a shock hazard.

e INSULATION RESISTANCE TEST

1. Unplug the power cord and short the two prongs of the plug with a jumper wire.

2. Turn on the power switch.

3. Measure the resistance value with ohmmeter between the jumpered AC plug and each exposed metal cabinet part, such as
screwheads antenna, control shafts, handle brackets, etc. Equipment with antenna terminals should read between 3M9
and 5.2MQ to all exposed parts. (Fig. A) Equipment without antenna terminals should read approximately infinity to
all exposed parts. (Fig. B)

Note: Some exposed parts may be isolated from the chassis by design. These will read infinity.

Antenna
terminal

Exposed EXDOSed
metal metal
part part
Ohmmeter
(Fig. A) (Fig.8)
Resistance = 3MQ-5.2MQ Resistance = Approx 00

4. If the measurement is outside the specified limits, there is a possibility of a shock hazard. The equipment should be
repaired and rechecked before it is returned to the customer.

. STANDARD CONNECTION METHOD WITH DIRECT CONNECTORS

(9 Lift the direct connector on the tape deck. @ Insert the pin into the top panel. (Push in Notes:
Push it straight down to lock it into place. and turn clockwise 90°.) 1. When using the direct connectors, do not
a use pin cords.
Momma. ? 2. When using this unit (SH-E4). place it
I o between amplifier and tape deck.
E Tuner
push down. I l 1 E
(a) Lower this unit (SH-E4) onto the tape Amplifier
I deck. Line up the direct connector and :51 g 1:
stabilizing pin properly. This unit (SH-E4)
1 1 I 1"

Tape deck
® Remove the stabilizing pin from the back U 1.1 u
' 3. Position the units in a straight column to

panel. (Turn counter-clockwise 90° and
avoid twisting and breaking the direct

pull.)
connectors.
4. If this unit is installed in a rack, first make
the direct connector connections.

4°
J @ In the same way as in steps ®~©, place
K, the amplifier on the equalizer. and
connect the tuner to the amplifier.

Connect the turntable and speakers with
their respective accompanying cords.