Onkyo TX-7430 - Service Procedures; Replacing the Fuses

TX·7430
Remote Control transmitter RC -82S
Tr ansmiu er: Inlrar ed
S
ign nl range: Appr o x. 5 meters (1 6ft. 4")
Power supply:
Two "AA" baueries (l .5V x 2 )
Dim ensrions (W x H x 0) :
64 x 18 x 149 mm
2-1/2" x 11/16" x 5-7/8 "
Weight :
110 grams 3.9 oz. (in clutl ing uaueri es)
SERVICE PROCEDURES
1. R eplacing the fuses
f or co nt inucd prrn cc tion ;);:;Ullst lir c ha za rd.replnce
0111\' with sa ure tvp e and s.uuc rat ing (use.
Circu it no. Part no. Des cripti on
f9 02 25207 5 2.5A-SE -EAK, Pri mary
f903 , P9 04 252078 5A-SE-EAK, Sec ondary
P905 252070 lA-SE-EAK , Scc ondary
2 . Change of FM/AM band step.
This mo del is not loca red Ihe band sclcc to r swilch.
If th e PM b and step is eha nged from 50k Hz 10 200k Hz, rcm ovc rwo
died es (lSS133) to 07 09 and 0710 on th e display PC boar d.
If th e AM band st cp is chungcd from 9kH z to 1 0kHz, rernov e 01 diodc
(lS S133) 10 0711 on th e displuy PC board.
3. Memory preservati on
Th is un it does 1I 0t req uire m emor y pr eserva tion b au cries .
A hu il t- in me mory p ower bac k- up sy stem prese rves co nten ts
01 th e m emory durin g p owe r lailur es and eve n when t he
Pli .
unit is unplugged . Th e unit rnust he pl ugge d in and the
power sw itch t urn ed Oll a nd oll on ce in order to char ge the
ba ck -up system . No te rhnt since th is is not a perma nent
mem ory,the po w er switch rnust be turn ed 00 a nd off a few
ti mes eac h mont h 10 keep the back -u p systern ope ra tive .
Th e per iod o f time dur ing whic h mem ory co nte nts ar e
preserved after pow er has last been turned off va ries
d cpen din g on climat e and placement of th e unit.
On the ave r age, mem ory contents ar e pro tec ted over a
pe ri od of 3 10 4 wee ks (a mi nimu m of 2 wee ks) af ter
the last time po w er has been turncd off. T his pe riod is
shor l er whe n the un it is ex pos cd to very high hum idit y or
used in an a rca with an ex tremel y humid clim a te.
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