Technical Information; Circuit Analysis - JVC AV-2771S Service Manual

AV-2771S |
TECHNICAL INFORMATION
m CIRCUIT ANALYSIS
@®MICRO PROCESSING CONTROL CIRCUIT [ in MAIN PCB Ass'y ]
° The microprocessor circuit of this model is composed mainly of a 64-pins control CPU (MN1872013JXR#) and non-volatile
memory (MN12C261D).
The circuit functions are essentially the same as the AV-2780S and AV-3150S, except for slight differences in PIP and sound
systems.
@CPU (Micro computer)
e=[ = EEL =
No. | OUT name OUT name
Ps [8 [pone [arcmnecowa ide | ee [orem
[a [aor [ven eve sv eons aio=onoy 05 [ w|i [Reysemny
Pe [iw | none [puceekasecin ernney [se |W | P60 |Kersameainanon ood |
7 [out | ro [Siumcowana @atay or |W | AGW [one aC moa tormer seine) —_|
fe [our | rst [Syoncnsane e.ocK fe | | 80_|Sine anexien onc era)
Pe [our] re [Smuncmenc _|s» [out | vos [onasen aapay taco |
fio [our | res [Siemcomano 40 | ou | vows |oramee apy) bck |
Pie [our [ree [e1occ tnersoreoncr 1 [our | vowe [orarom ampave |
Fie [our [rss [onta tine snstconen [| [our] vows [orsacen aor) |
fis [our | ros [evasie riers coor [ss [our] Toe [Ave ming mana:ry |
fis [our [per [rcrsamng des [our | roe |aocmim
fiz [our | oxco [vounecmes [se [out | 0s [aie TVA oising Sm vra>
pie [our | mcr [rnreowa ier [our | Pen [Poneronetowionny
fie [our | oace [eotoncone —_—iss [ou | Pes [ewncwerneeze oon orn |
|
| Peo |
ST
ree [Moe oon oe |
[Pes _[ NS mae icin AWIEAP) |
Pin | pas Key scanning ;
| our |
our |
[our
|v rst [row
[| rar [Remote cont signa nenatve) |
[IN [svc |. enc. anal (or character serraon_|
[NV S¥Nc [v. sync. sia or castor genraon |
ma
| iGO | Power stoppage detection
PIP on/off (off : H)
5. | in | sett | Compulink detection (detecting : L)
5 SBDO | PIP position control
OUT
OUT
OUT
OUT
IN
IN
IN
IN
IN
UT
IN
UT
a a a a a a
ololwlo ln nwmyrn]{rwlnr
fefele]s fala [a]? /s|
(e)
c
|
OUT | SBTO | PIP position control
20 (No.50577)