Onkyo TXSV 515 Pro Schematic

Page 1

TX-SV515PRO II

Ref. NO. 3483
QUARTZ SYNTHESIZED
TUNER AMPLIFIER
MODEL TX-SV515PROII
Buck model
BMD, BMDN, BMDC 120V AC,60HZ
BMI 230V AC. 50Hz
BMW 120/220V AC, 50/60H2
BMQA ' 240V AC, SOHZ 1
SAFETY-RELATED COMPONENT WARNINGH TABLE OF CONTENTS
COMPONENTS INDENTIFIED BY MARK AON
THE SCHEMATIC DIAGRAM AND IN THE Specifications ...... w2
PARTS LIST ARE CRITICAL FOR RISK 0?" Fl RI: Service procedures.. ...3
AND ELECTRIC SHOCK. REPLACE; THESE Exploded View. "A
COMPONENTS WITH ONKYO PARTS WHOSE Pans list ..... 5
PART NUMBERS APPEAR AS SHOWN IN THIS Microprocessor demipuonsm 5
MANUAL IC block diagrams and dcscriyuons 9

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

I ONKYOQ
Alllllll BUMPflNENIS

Block diagram .............................
Amplifier
Tuncr section
Adjustment procedures
Primad circuit board views from bottom sxdc..
Schematic diagram ..................................
Connection diagram of microproccssor
Tuner section ....................

Power supply and video section"
Audio section ........
Surround suction.

Primed circuit board-puts Iisl
Packing View

section

Page 3

SERVICE PROCEDURES

1. Replacing the fuses
For continued protection against fire hazard, replace only
with same type and same rating fuse.

Circuit no. Part no. Description
F901 252166Y A6.3A-UL/T-237,Primary fuse
F902 252076 A3.l5A-SE-EAK,Primary fuse

F903 252075 AZSA-SE-EAKAC outlet f use (P)
F911,F912 252166Y A6.3A-UL/T237.Secondary fuse (D)
252079 A6.3A-SE-EAK,Secondary [use

NOTE: (D) :Only 120V model
(P) :Only 230V model
(W) :Only Worldwide model
(P) :Only 240V model

2. Change of FM/AM band step.
With the exception of the Worldwide model, a BAND STEP
selector switch is not provided.

(AM)

BAND STEP R724 D711
lOkHz-rngz Addition Addition
9kHz-rlOkHz Eliminated Eliminated

In R724 Carbon resistor 1 k9
(Part No.4l7341024) is used.
In D711 Diode lSSZ70A
(Part No.223205) is used.
- Worldwide model-
Worldwide models are equipped with a step band selector
switch. This switch is located on the back panel. This
switch is set to 9kHz (AM) at the factory,
but may have to be reset to 10kHz depending
on the area where the unit is used.
AM step
9kHz
lOkHz

Europe:
U.S.A:

Rm mu

FuJORBCmTTUBE

DISPLAY CIRCUIT PC BOARD

TX»SV515PRO ll

RNA
can

AEEA

POWER SUPPLY CIRCUIT PC BOARD

mi

Eva

no

MAIN CIICUIT PC BOARD

3. Memory preservation

This unit does not require memory preservation batteries.
A builtdn memory power back-up system preserves
contents of the memory during power failures and even
when the unit is unplugged. The unit must be plugged in

and the power switch turned on and off once in order to
charge the back-up system. Note that since this is not a
permanent memory the power switch must be turned on
and off a few times each month to keep the back-up
system operative. The period of time during which
memory contents are preserved after power has last been
turned off varies depending on climate and placement of
the unit. On the average, memory contents are protected
over a period of 3 to 4 weeks (a minimum of 2 weeks) after
the last time power has been tumed off. This period is
shorter when the unit is exposed to very high humidity or
used in an area with an extremely humid climate.

4. Safety-check out

(Only U.S.A. model)

After correcting the original service problem perform
the following safety check before releasing the set to the
customer.

Connect the insulating-resistance tester between the plug. of
power supply cord and terminal GND on the back panel.
Specifications: 3.3 Mohrn 110% at 500V.

5. Change of voltage

Worldwide models are equipped with a voltage selector to
conform with local power supplies. This switch is located
on the back panel. Be sure to set this switch to match the
voltage of the power supply in your area before turning the
power switch on.

This switch is set to 220V at the factory. Voltage is
changed by sliding the groove in the switch with the screw-
driver to the right or left. Confirm that the switch has been
moved all the way to the right or left before turning the
power switch on.