Onkyo TA-2800 Service Manual

TA-2800
HD614128SA41 (COUNTER)
REMA/CONS IN
REMA/ CONS OUT
BIN
CONS/ REMA
RESE?
SIZE
microcomputer QE SE +
ADJUST
DOM / Ex
SERIAL DATA '
CLOCK 20 23 “AKE uP |
[20] | ae > rotation sensor
vec (+5V) L SUPPLY |
Terminal Name and Function
Name : Function |
l1~3 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)
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
18 T,/T2 Microcomputer T,/T, function selection input (With T, , system I/O receiving) |
19 DATA coms mechanism status input (8 bit serial data) from mechanism control micro-
20 CLOCK Clock input for reading above DATA (DATA taken on pulse wave dropping)
21 Vcc __ 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 )
74 : DOM/EX Domestic/export setting use selector input (Tape size type selector use)
Domestic: With powerON C46 > C54 > C60 > C80>C90>C120 |
25 | ADIUST compensating or ound) 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 7
30 GND Microcomputer power source (GND
31 SIZE | Tape size selector input
32, RESET Lapsed time reset input (When displays, digits are O: OO)
33 CONS/REMA Lapsed time « > remaining time selector input (toggle display)
340 BOUT System bus output
35 | BIN __|_ System bus input
| 36 | REMA/CONS OUT _ Remaining time display/lapsed time display status output (when T,
Remaining time display/lapsed time display status input (when T,
39 ~ 42 Grid 1 ~ 4 FL tube grid (DIGIT) drive use output

Onkyo TA-2800 Specifications

General

Brand	Onkyo
Model	TA-2800
Category	Tape Deck
Language	English