Onkyo HTR 540 Service Manual
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Extracted text from Onkyo HTR 540 Service Manual (Ocr-read)
Page 1
HT-R540
Ref. No. 3940
ONKYO SERVICE MANUAL 42°
AV RECEIVER
MODEL HT-R540
RC-649M
Black and Silver models
B MDD 120V AC, 60Hz -.. ___
B MDC 120V AC, 60Hz S MDC 120V AC, 60Hz
B MPA 230-240V AC, SOHZ S MPA 230-240V AC, SOHZ
SAFETY-RELATED COMPONENT
WARNING! !
COMPONENTS IDENTIFIED BY MARK A ()N THE
SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ()NKYO
PARTS WHOSE PART NUMBERS APPEAR AS SHOWN
IN THIS MANUAL.
MAKE LEAKAGE-CURRENT 0R 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
SERVICE PROCEDURE
1. Replacing the fuses
EE This symbol located near the fuse indicates that the
fuse used is slow operating type. For continued protection against
fire hazard, replace with same type fuse. For fuse rating, refer to
the marking adjacent to the symbol.
EE Ce symbole indique que le fusible utilise est e lent.
Pour une protection permanente, n'utiliser que des fusibles de meme
type. Ce demier est indique la qu le present symbol est appose.
REF NO. PART NAME DESCRIPTION PART NO. REMARKS
F901 FUSE 8A-UL/T-233 252329GR I,
F901 or FUSE 8A-T/UL-ST2 252261GR I,
F901 FUSE 4A-SE-EAK FUSE 252077GR I,
F901 or FUSE 4A-SE-TL250V 252277GR I,
F903 FUSE 5A-UL/T-233 252326GR I,
F903 or FUSE 5A-T/UL-ST2 252258GR I,
F903 FUSE 2.5A-SE-EAK FUSE 25207SGR I,
F903 or FUSE Z.5A-SE-TL250V 25227SGR I,
F6901 FUSE lOA-UL/T-233 2523SOGR I
F6901 or FUSE lOA-T/UL-ST2 252333GR I
F6902 FUSE lOA-UL/T-233 2523306R I
F6902 or FUSE 10A-T/UL-ST2 252333GR '
2. To initialize the unit
1. Press and hold down VIDEO 1NCR button, then press STANDBY/ON button when the unit is powered on.
2. After " Clear " is displayed, the preset memory and each mode stored in the memory, are initialized and
will return to the factory settings.
3. To check version of microprocessor
Main microprocessor Q701 only.
1. Press and hold down DISPLAY button, then press STANDBY/ON button when the unit is powered on.
The version will be displayed on FL display only for 3 seconds.
Ex.
Ver.1.01/05305a
2. Press STANDBY/ON button to power off.
4. Memory Backup
The AV receiver uses a battery-less memory backup system in order to retain radio presets and other settings
when it is unplugged or in the case of a power failure.
Although no batteries are required, the AV receiver must be plugged into a wall outlet in order to charge the
backup system. Once it has been charged, the AV receiver will retain the settings for several weeks,
although this depends on the environment and will be shorter in humid climates.
HT-R540