Onkyo TXNR 708 Service Manual

Page 1

ONKYO SERVICE MANUAL

AV RECEIVER
MODEL TX-NR708(B)I(S)

I

Black and Silver models

B MDC, B MDF

120V AC, 60Hz

B MMP, B MMA, S MMP

2207240V AC, 50/60Hz

B MMR, B MMQ

220-240V 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 LEAKAGEACURRENT OR RESISTANCE
MEASUREMENTS TO DETERMINE THAT EXPOSED
PARTS ARE ACCEPTABLY INSULATED FROM THE
SUPPLY CIRCUIT BEFORE RETURNING THE
APPLIANCE TO THE CUSTOMER.

ONKYQ

IMAGINATIVE SIGHT & SOUND

TX-NR708

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TX-N R708

SERVICE PROCEDURE-1

1. Replacing the fuses

Eg 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.

Eg' Ce symbole indique que le fusible utilise est e lent.

Pour une protection permanente, n'utiliser que des fusibles de meme
type. Ce dernier est indique la qu le present symbol est apposre.

REF NO. PART NAME DESCRIPTION PART NO. REMARKS

F2000 FUSE 4A-ULff-233 252325GR

F2000 or FUSE 4A-TlUL-ST2 252257GR

F2001 FUSE 2A-ULfT-233 25232OGR

F2001 or FUSE 2A-T1'UL-ST2 252253GR

F6901 FUSE 15A-TUL-250V 252303GR

F6901 or FUSE 15A-ULfT-314 252197GR

F6902 FUSE 15A-TUL-250V 252303GR

F6902 or FUSE 15A-ULfT-314 252197GR

F901 FUSE lOA-UL-ST6 N1 252382GR

F901 FUSE SA-SE-EAK 25207 SGR
F901 or FUSE 5A-SE-TL250V 252278GR

: 120V,Canadian model

: 230V,CE(European) country model
: 230V,Australian model

: 220/230-240V,Hong kong model
: 2201'230-240V,Chinese model

2. Safety check out
(USA. model only)
After correcting the original service problem, perform the following safety check before releasing the unit to the customer.
Leakage current Check
Measure the leakage current to a known earth ground (water pipe or conduct etc.) by connecting a leakage current
tester between the earth ground and exposed metal parts of the unit (input/output ground terminals, screw heads or metal overlays etc.).
Plug the power supply cord directly into a 120Vac 60H: wall socket and turn ON/STANDBY button on.
Any current measured must not exceed 0.5mA.

3. Memory Backup
This model uses a EE-PROM lC in order to retain radio presets and other settings. So, memory contents will be
kept eternally with no care.

4. To initializethe unit
1. ON/STANDBY (Power On)

2. VCR/DVR + ON/STANDBY. ON/STANDBY VCR/DVR

Preset memory and each mode stored in the memory, are
initialized and will return to the factory settings.