Service Procedures - Onkyo TX-SV535 Service Manual

SERVICE PROCEDURES
1. Replacing the fuses
Ш [L-mi symbol located near the fuse indicates that Ше fuse
used is fast operating type. For continued protection against fire
hazard, replace with same type fuse. For fuse rating refer to the
marking adjacent to the symbol.
W ІІ. Ce symbole indique que le fusible utlise est a rapide.
Pour une protection permanente, n'utiliser que des fusibles de meme
type. Ce darnier est indique la qu le present symbol est appose.
CIRCUITNO. PART МО. DESCRIPTION
F901 252166Y | 6.3A-UL/T-237, Primary <D/W>
F902 252076 3.15A-TSC, Primary «P/W»
F903 252075 2.5A-SE-EAK, Primary <P>
NOTE: <D> :120V model only
<P> :230V model only
<W>:Worldwide model only
2. To Initialize the unit
This device employs a microprocessor to perform various
functions and operations. If interference generated by an external
power supply, radio wave, or other electrical source results in
accident which causes the specified operations and functions to
operate abnormally.
To perform a result, please follow the procedure below.
1. Press and hold down the VIDEO-1 button, then press the
POWER button.
2. After "clear" is displayed, the preset memory and each
mode stored in the memory, such as surround, are
initialized and wil! return to the factory settings.
3. 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 the screw on the back panel.
Specifications: 3.3 Mohm+10% at 500V.
4. Change of voltage
Worldwide models are equipment 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
TX-SV535
sliding the groove in the switch with the screwdriver 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.
VOLTAGE
SELECTOR
220V~ 120V~
5. Memory preservation
This unit does not require memory preservation batteries.
A built-in memory power back-up system preserves contents of
the memory during power failures and even when the unit 15
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 the keep the back-up system
operative.
The period of the 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 turned off. This
period is shorted when the unit is exposed to very high humidity
or used in an area with an extremely humid climate.
6. Setting the tuning step frequency
Worldwide models are equipped with a step band selector switch.
This switch is located on the back panel. This switch is set to 9
kHz at the factory, but may have to be reset to 10 kHz depending
on the area where the unit is used.
AM band step
Europe: 9 kHz
U.S.A.: 10kHz
AM FREQ.
STEP
9kHz 10kHz
7. Changing the band step
With the exception of the worldwide models, a tuning step selector
switch is not provided. When you change the band step, change
the parts as shown below.
To 10 kHz To 9 kHz
R764 1.8 kohm 3 kohm