Technics QUARTZ SL-MA1 - Page 2

Dimensions: 45.3 x 17 x 40.8 cm
gy Generar (W x H x D) (17-27/32" x 6-11/16" x 16-1/16")
Power supply: For U.S.A. and Canaca Maximum height when dust cover is
AC 120V, 60 Hz open
For other countries 45.3 x 52 x 60cm
~ 110-127/220-240V , 50 or 60 Hz (17-27/32" x 20-15/32" x 23-5/8")
Power consumption: For U.S.A. Canada 15W/2W Weight: 9kg (19.8 Ib.)
with the power switch OFF.
For other countries 18W/2W Specifications are subject to change without notice for further
with the power switch OFF. improvement. : :
Weight and dimensions shown are approximate.
@ CONTENTS
Page Page
LOCATION OF CONTROLS... ...... 02-0 ee ee eee 3 REPLACEMENT PARTS LIST. ...........2.225008- 24
DISASSEMBLY INSTRUCTIONS .........-22 0002 cour 4 EXPLODED VIEW. ...... cee eee eee eet es 25
MEASUREMENTS AND ADJUSTMENT... ......--0005 8 CIRCUIT BOARDS AND WIRING
HOW TO CHECK EACH CIRCUIT... 1... 0... 2 eee ee ee 10 CONNECTION OF DIAGRAM.........+2-+ 0500858 28
TECHNICAL GUIDE... 0... ee 12 SCHEMATIC DIAGRAM .........-2 00 eee ee eeee 31
BLOCK DIAGRAM. .. 1... 0.0 eee ee et ene 18 POWER SOURCE CIRCUIT. . 1.1... cee ee eee ee 35
FUNCTION OF TERMINAL (MN1420FPS) ............ 21 RESISTORS AND CAPACITORS .........-0 +e ee eee 37
OPERATION TIMING CHART. .......- 20005 ce vee 23 PACKING .. 0... ec ee ee ee ee es 38
a SAFETY PRECAUTION (This ‘‘safety precuation" is applied only in U.S.A.)
Before servicing, unplug the power cord to prevent an electric shock.
When replacing parts, use only manufacturer’s recommended components for safety.
Check the condition of the power cord. Replace if wear or damage is evident.
After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
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.
aAfFWN>
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 3MQ
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 Exposed
metal metal
part part
Ohmmeter Ohmmeter
(Fig. A) (Fig. B)
Resistance = 3MQ2—5.2MQ Resistance = Approx oo
4. |f 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.