Onkyo TA-2550 Service Manual

HD614128SA41 (COUNTER)
Terminal Name and Function
TA-2550
f-—#— REMA/CONS IN
REMA/ CONS OUT
microcomputer RES €7
ADJUST
o~o-4 oom / Ex
Le—-ake uP] ;
> rotation sensor
suey |
Pin No. Name Function _
1~3 Grid 5~7 FL tube grid (DIGIT) drive use output
4 Vdisp Input (FL tube use) for minus bias voltage to pin Nos. 1 ~ 3, 5,6,9 ~ 16, 39 ~ 42 |
5 CONS FL tube display use output (time lapse) 7
6 REMA FL tube display use output (time remaining)
9~15 a~g FL tube segment drive use output
16 Colon | FL tube “:” drive use output
[418 T,/T2 | Microcomputer T, /T2 function selection input (With-T, , system I/O receiving)
Deck mechanism status input (8 bit serial data) from mechanism control micro-
Sg abies computer
| 20 CLOCK Clock input for reading above DATA (DATA taken on pulse wave dropping)
21 Vee Microcomputer power source (+5V)
22 SUPPLY Cassette mechanism tape feed side turning pulse input |
23 TAKE UP Cassette mechanism tape windup side turning (pulse input )
14 DOM/EX Domestic/export setting use selector input (Tape size type selector use)
Domestic: With power ON C46—> C54 -—> C60 > C80 > C90 > C120 254
25 ADJUST ane buffer compensating value input (normally open,
26 RESET Microcomputer system reset
27 TEST Microcomputer internal test use port, normally connected to Vcc |
28,29 | OSC1, OSC2 Microcomputer clock oscillator terminal
30 GND Microcomputer power source (GND)
31 SIZE Tape size selector input |
| 32 RESET Lapsed time reset input (When displays, digits are 0 :O O)
33 CONS/REMA / Lapsed time « + remaining time selector input (toggle display)
34 BOUT System bus output
| 35 BIN System bus input I
| 36 REMA/CONS OUT __| Remaining time display/lapsed time display status output (when T3)
37 REMA/CONS IN Remaining time display/Japsed time display status input (when T.)
39~42 | Grid 1 ~4 FL tube grid (DIGIT) drive use output |
_7-

Onkyo TA-2550 Specifications

General

Brand	Onkyo
Model	TA-2550
Category	Tape Deck
Language	English