Onkyo TXSR 674 Service Manual
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Extracted text from Onkyo TXSR 674 Service Manual (Ocr-read)
Page 1
TX-SR674/674E/8
Ref. No. 3949
ON KYO SERVICE MANUAL 2"
AV RECEIVER
MODEL TX-SR674
MODEL TX-SR674E
MODEL TX-SR8467
RC-651 M
%1 \il
TX-SR674 Black, Golden and Silver models
B MDD, B MDC, S MDC 120V AC, 60Hz
B MPA, S MPA 230-240V AC, 50Hz
B MWT, B MWO, G MWT, G MWO 120V/220-24 0V AC, 50/60Hz
G MGR, G MGQ, G MGK 220-230V AC, 50/60Hz
TX-SR674E Black and Silver models
lB MPP, B MPB, s MPP, s MPB l 230-240v AC, 50112
TX-SR8467 Golden model
|G MGR
l 220-230v AC, 50/60Hz
SAFETY-RELATED COMPONENT
WARNING !!
COMPONENTS IDENTIFIED BY MARK A ON 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 ()R RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.
ONKYOE
IMAGINATIVE SIGHT & SOUND
Page 2
SERVICE PROCEDURE
1. Replacing the fuses
EE This symbol located near the fuse indicates that the
fuse used is show 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 1a qu 1e present symbol est apposre.
REF NO. PART NAME DESCRIPTION PART NO. REMARKS
F901 FUSE 10A-UL/T-233 25233OGR I,
F901 or FUSE 10AAT/UL-ST2 252333GR I,
F901 FUSE 5A-SEEAK 252078GR I,
F901 or FUSE 5A-SE-TL250V 25227SGR I,
F902 FUSE 5A7SEAEAK 252078GR I,
F902 or FUSE SA-SEATLZSOV 25227861? I,
F903 FUSE 5A»UL/T-233 252326GR I,
F903 or FUSE SA-T/ULASTZ 252258GR I,
F903 FUSE 2.5AASE-EAK 252075GR I,
F903 or FUSE 2.5AASEATL250V 25227SGR I.
F910 FUSE SAiUL/T7233 252326GR I
F910 or FUSE 5A»T/UL»ST2 25225861? I
F6901 FUSE 12A~TULA250V 2523016R I
F6902 FUSE IZA-TUL-ZSOV 252301GR I
2. To initialize the unit
1. Press and hold down the VIDEO 1/VCR 1 button, then press the STANDBY/ON button when the unit is Power 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 the version of microprocessor
Main microprocessor 0701 only.
1. Press and hold down the DISPLAY button , then press the STANDBY/ON button when the unit is Power on.
The version is displayed on FL display for 3 seconds.
Ex.
Main1.01/05305A
2. Press the 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's unplugged or in the case of a power failure.
Although no batteries are required, the AV receiver must be plugged into an AC 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.