Pioneer sx 880 service manual

Page 1

8,3 POWER AMPLIFIER

Tum VittiL) and want) hilly umumi in the
counterclockwise dimtiun. but set VR,(L) and
Vim) to the center positions. Without any land
Dl' Input signaL tum the POWER switch on:

DC Balance

Adjust WM!» and Vllnfll) so that potential
difference between terminals 50.) and 12m)
and ground reads um: volts (to within :30mV).

u this level cannot be attained. disconnnct the
Jumper leads P(L| and mm (or mannect it
alxeady disconnected), and then Radius!

Idlu Current

Adjust VR~(L) and VR.(R) so that the potential
difference between the plum) terminals sti
and 14m). and the minus (v) terminals 10(L)
Ind 161R) reads anniv tax at least in the 20 to
Man [311ch

After passing 1 current far about 10 minutes,
check these vniuge mdiiigs again.

SX-EBD

Output va Calibntinn

1. Set the SPEAKERS A swiu-n to ON. Ind con-
nect an AC voltmeter to the SPEAKERS A my»
mimis.

2. Set the BASS ind mama controls to Lhe nut
(center) position.

a. Set the ruivcnox switch to the Ale posi-
tion. and Ipply u lkHZ. 150mv signal to the
input terminals.

4. Adjust the VOLUME cantioi for In AC voll-
metzl reading of 213].

5. Adjust VR.(L) Ind mum for reading of
saw (ouni at the output meter undex mi; wn-
ditiun.

van. VR,

Fig 13 Oulpul meur ulibfllion

Fig. la PM! amplifieradiusimsni

Page 2

8. ADJUSTMENTS

3,1 FM TUNER
Tuning cm! in nu- FM front-end does not hm
an adjusting core, Cnnsaquently, tracking adjuw

menu II 230th an performed by legal-ting file'

up between the rowr and mm of the bunln:
cnplcimn (vc.. vc,, Wu. The expression
Idjusl vc." 01:3,. vc,) found in the ma mum
mu 0.. two ouler mun lat-dos of ml. of dune
tuning cap-bitch m w be extended outwudl
with spuuuu (Pm No.1 comm us shown in
Hz. a).

Rom: Mid!

Tuning
Caoaenov
Sun

Sum

Rem: mm
Fig 3 Adiuunmu M «m mnina cumin"

1. Connect the m: iumummu u thown in
Fig. 10.

2. Setthe FUNCTION switch to FM.

3. Turn mu m mmma switch m arr.

I. Set me am poinm 0! m. sx-sao to 106MHz.

5 Set am PM Sign] Genu-torflM so) output
to 6MB .1 108MHz, with 10092 modullfion
mskxz deviation) for 40on. m: mnauxu.
unn sewn; should be used (or an the mum.
in: adjustments (Motion 6 to 23).

6 Adjust To. to give the muimum tending on
the SIGNAL meter of the sx-sso.

7. Adjun (he prim-[y (lower) core or T, so am
the TUNING meta indie-tor needle of me
sx~sso mas deld center.

a. Set the m sc. output to 15a.

9 Adjust TC. and Tcz lo give me muimum
reading on um SIGNAL meur.

1a

10, Set the SX-BBO dill pointer to BOMHZ.

11 u Slt the FM SG output to 6N3 at 90M;

12. Adjust VC; for maximum reading on the
SIGNAL meat.

13. Set the FM 60 output tu 15(18.

l4. Adjust VC. Ind VC; In that the SIGNAL
male! In. niche! I maximum.

15. ummly reput the ldjustmenu or VC;I ,
VC, Ind VC, when the dlnl pointer is at
MHZ. and 0! TC). TC and TC, when the
dial pointer is it 106MHz. until adjustment at
lb: one inquemry xequlm no {mum re
ldj'ustment It the other kequency.

15. Adjust the can of T. to give the miximum
mding an the SIGNAL meter.

17.De~tune the SX-ESD (to a position It which
only intern-lion nail: in hard). Ind min
the plimlry (lawn) Cole 01 1, so am the
TUNING meter indicawr needle with dud
ccnur.

18. Set the FM SG output to GOdB at BBMHI.

19.11 the SX-SBO to I dial Riding of 985:
and check that the TUNING male! is reading
correctly at the center of menu- scale.

20. Adjust the moondlry (upper) com or T, to
give I mlnimum level of distortion.

21. Renal. the my: detailed ln mfion 17 to 20
for the adjustment at primary and mondnry
can: a! T, until born muimmmu as fully
allslml

22. Set the SXJBO dlll indie-lion Ind FM 56 fra-
quency for BSMHI.

23. Turn the FM MUTING switch tu 0N. and
check the muting Hue-hold. H the muting
threshold is more thun 2MB. cut lhe jumper
lead NIX-W310).

24 Set the FM 56 output to 10MB.

25. Adjust VB... no {hit the SIGNAL meter m
1.8 (50% of the dlltlnoe botwnn 4 Ind E on
the 2:13,: Fig, 9).

SINGANL mm:

FuNCTlON

Fig, 9 SIGNAL mum calibmian