Onkyo TXSR 508 Service Manual

Page 1

Ref. No. 4189

ON KYO SERVICE MANUAL 2"

AV RECEIVER
MODEL TX-SR508(B)/(S)/(G) g; : Black model

: Silver model
(G) : Golden model

AV RECEIVER only
TX-SR508(B)
: 120V, 60Hz, Canadian model
: 220/230-24ov, 60Hz, Saidi Arabian model RC'754M
: 220/230-240V, 50Hz, Hong kong model
: 230V, 50Hz, CE(European) country model
: 230V, 50Hz, UK model
TX-SR508(G)
: 220/230-240V, 50Hz, Chinese model
TX-SR508($)
: 230V, 50Hz, CE(European) country model

AV RECEIVER in HTiB(Home-Theater-in-a-Box)
TX-SR508(B) in HT-$6305(B)
: 230V, 50Hz, CE(European) country model

SAFETY-RELATED COMPONENT
WARNINGI!

COMPONENTS IDENTIFIED BY MARK AON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO
PARTS WHOSE PART NUMBERS APPEAR AS SHOWN
IN THIS MANUAL.

MAKE LEAKAGE-CURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.

ONKYO

IMAGINATIVE SIGHT & SOUND

Page 2

TROUBLE SHOOT-1
No Power

No Power

1

BAETC-0376/0390 (Power supply)
BADG-O364 (MPU Board)
JL901 4pin +12V

2pin +10V

NO

V

BAETC-(B76/0390 (Power supply)
Replace Power Supply Board orRepair
Sub Transformer T902 and itsperipheral
circuit.

TX-SRSOB/ /508/ 578/ 608 HT-R280/ 380/ 8/ 580/ 680/ 980/ C230/ 0260 DTFl-20.2/ 30.2

YES

After replacing F901 on
BAETC-0376/0390 (Power supply)

either of F901 on Power supply Board
or F6901/F6902 on BAAF-0341 (AF
Board) blows out?

NC

This is just for general reference and does not including every single case.

BAETC-0376/0390
(Power supply)
BADG-0364 (MPU Board)

After Power on,
Voltage atJL90171 pin is changed
from +12V t 0 0V?

NO

1 YES

BAETC-0376/O390
(Power Suppl
F901 is blown out?

y)

(No

BADG-0346 (MPU Board)

After Power on, Voltage at

1 YES

Replacing F901 will not
improve the unit.

BAAF-0355(AF Board)

Replace AF Board".
or D6901 (Powersupply diode)

Power AMP(Final_TR and A_Class AMP) "

and also repair their peripheral circuit.

P200122/21pin +5V
17/18pin +12V

YES

BADG-0364 (MPU Board)
Replace 0701 and also
repairits peripheral circuit.

fl

NO

BA ETC-0359/0352/0345/

(trans teminal Board)
After Power on, Voltage at
JL952 AC1OV

(No

Replace Power
Transformer or
Repair its peripheral circuit.

BAVD-0375/0389
(Video board)

Replace Video Board or
Repair D901/09023/09031
and their peripheral circuit.

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