Technics SAGX 100 Service Manual

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SA-GX100

I AM TUNER SECTION

Frequency range
Sensitivity

Selectivity

Image rejection at 1000 kHz
IF reflection at 1000 kHz

I CONTENTS

SAFETY PRECAUTION.
ACCESSORIES ......

REAR PANEL TERMINALS AND FUNCTIONS
FRONT PANEL CONTROLS AND FUNCTIONS.

DISASSEMBLY INSTRUCTIONS
PROTECTION CIRCUITRY ......

BEFORE REPAIR AND ADJUSTMENT.
MEASUREMENTS AND ADJUSTMENTS

TERMINAL FUNCTION OF IC
INTERNAL CONNECTION OF FL.

I SAFETY PRECAUTION

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

When replacing parts, use only manufacturers recommended components for safety.

. Check the condition of the power cord. Replace I? 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.

(receive

530~i720 kHz
20 [.1V, 330 uV/rn
55 dB

40 dB

60 dB

- INSULATION RESISTANCE TEST
1. Unplug the power cord and short the two prongs of the plug with a iumper 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.

I GENERAL

Power consumption 170 w

Power supply AC 120V, 60Hz

Dimensions (W x H x D) 430 X124 x 300 mm
(16-15/16"X 4-7/8"XI1-13/16")

Weight 5.9 kg (13.1 lb.)

Note:

Total harmonic distortion is measured by the digital spectrum

analyzer.

BLOCK DIAGRAM
TERMINAL GUIDE OF IC TRANSISTORS AND DIODES
SCHEMATIC DIAGRAM ..
PRINTED CIRCUIT BOAR
WIRING CONNECTION DIAGRAM
EXPLODED VIEW .....
REPLACEMENT PARTS LIST.
PACKING....
RESISTORS 8t CAPACITORS

(This safety precaution is applied only in U.S.A.)

Equipment with antenna terminals should read between EMS"!

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 /

metal
pan

Ohmrneter

{Fig.A)
Resistance = 3MQ-5.2MQ

Exposed
metal
part

Ohmrneter
(Fig. B)
Resustance = 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.

- Remote control transmitter

I ACC ESSO RI ES
- AC power supply cord
(SJA172»1)(P) ............ ipc.
(SJAtIZ) (PC) ............ 1pc.

. FM indoor antenna

(SSA272M) .............. 1 pc.

(RAK»SA301 P) ........... 1 pc.
0 AM loop antenna - AM antenna holder 0 Screws
(SPBt 163T) .............. ipc. (SMA233-1 M) ........... 1pc. (XTNS +10AFZ) ......... 2pcs.

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