Service Procedure; Replacing The Fuses; Safety Check Out; To Initialize The Unit - Onkyo TX-NR525 Service Manual

SERVICE PROCEDURE-1

1. Replacing the fuses

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.
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 apposre.
REF NO. PART NAME DESCRIPTION
F6401 FUSE
F6401 or FUSE
F6402 FUSE
F6402 or FUSE
F9002 FUSE
F9002 FUSE
F9001 FUSE
F201 FUSE

2. Safety check out

(U.S.A. 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 60Hz wall socket and turn ON/STANDBY button on.
Any current measured must not exceed 0.5mA.

3. To initialize the unit

Press ON/STANDBY button while pressing down VCR/DVR(TX-NR525/HT-RC550 is CBL/SAT) button
when the unit is POWER ON, then the FL displays "CLEAR", and turn to STAND-BY. Remove power cord from power line.
4. To check version of each Firmware
a. Push STANDBY/ON key while pushing down DISPLAY key to display MMPU(Main Microprocessor) version.
e.g.
M 1 .0 1 /1 3 2 0 4 AL N
b. In display version, -(TONE) key and +(TONE) key are pushed to display another F/W version.
-(TONE)
e.g.
M1.0 1 /1 3 2 0 4 AL N
-(TONE)
e.g.
D1 .0 2 /1 3 2 0 2 AEA
-(TONE)
e.g.
O1 .0 0 /1 2 Z1 8 AL
PART NO.
10A-UL/T-233 252330GR
10A-T/UL-ST2 252333GR
10A-UL/T-233 252330GR
10A-T/UL-ST2 252333GR
4A-SE-EAK 252077GR
8A-UL/T-233 252329GR
1A-SEUL-TL250V 252397T
4A-SEUL-TL250V 252392T
+(TONE)
+(TONE)
+(TONE)
<Notes>
<MDC> : 120V,Canadian model
<MPP> : 230V,CE(European) country model
<MPB> : 230V,UK model
<MMK> : 220/230-240V, Korean model
<MMQ> : 220/230-240V,Hong kong model
<MPA> : 230V,Australian model
<MMR> : 220/230-240V,Chinese model
<MDF> : 120V,Taiwanese model
REMARKS
!
!
!
!
!
<MMK, MMQ, MMR, MPA, MPB, MPP>
!
<MDC, MDF>
!
!
Version of MMPU displayed only for 3 seconds.
MMPU
Version displayed
DSP
only for 3 seconds.
HDMI/Video
Microprocessor
TX-NR525