Sony ST H500 Service Manual

Page 2

ST-HSOO

MODEL IDENTIFICATION
-Model Number Label-

SONYo

FM STER EO/FM-AM TUNER

MODEL N0 ST»H500

m

AEP, UK, Model : (AE)
ltarian (IT) Model: (IT)

0 Power supply for service
Since this machine has no power source in itself, the power is supplied form AMP TA-H500 used for this series.
As shown in the following table, this machine requires 4types of voltage, and supplying each type of voltage
separately makes complicated connections.
Accordingly, make connection with TA-H500 at time of service, such as electrifying repair.
AC 3.9V FL»tube filament voltage
DC -24V Display controller IC701, grid voltage
DC 5V Display controller IC701, Vcc
DC 13V PLL control voltage
0 Service mode for checking the timer ON/OFF
1) Connect with AMP TA-H500 and set the power switch of TA-H500 to the state of STANDBY.
2) Set the time of tuner to a proper time (any time).
3) Press 3 switches simultaneously, namely, PRESET 1O, O and O BAND.
4) F L-tube display

All lamps lighting
1

1 sec.

10: 23

i 0.5 sec,

10:24

i 0.5 sec.

-»voWERoN

l 3 sec.
--* POWER OFF

5) End

SA FETY-RELATED COMPONENT WARNINGI!

COMPONENTS IDENTIFIED BY MARK A 0R DOTTED
LINE WITH MARK A ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.

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