Denon DP-59L - Microprocessor Explanation; Motor Control IC and Outputs; Speed Indicator and RPM Selector; Microprocessor Terminal Functions (Part 1)

EXPLANATION OF THE MICROPROCESSOR
@ Motor Control IC ..... IR3TO5 (at standard re- 5. Power source input
volution of 33 rpm)
The numbers on the left hand side indicates the terminal Vec: 5V +0.5V
number.
6. FGI bypass terminal
1. Stop output
E6=% Vcc
during stop control: OV
during start: open
7. FGI lowpass terminal
2. Lockindicator — ees
during lock ..... (LED lit dimly) fo)
Re eh a ea = 1.2~1.5V
69HZ
1/2
Vee
ey
| | T- 4v 8. FGI output
1.8mS
SOO csietdeiceamtes (LED iit)
=1.2~1.5V
during transition .... (LED flashes) 1/2 Vec
0.45S 2.2HZ 9.
| | | ji =4V The gain set element is connected.
FGI inverse input
E9=% Vcc
3. 0.22us (0%) 10. FGI non-inverse input
(0%) 10mVpp ~ 100mVpp
|
0.22us
|
E10=%
Vee
3V
11. -FG Il non-inverse input
OV
: | 10mVpp ~ 100mVpp
Frequency will vary by changing turntable revolution E113 % Vee
within the range of +9.9%.
4. rpm selector
P 12. FG Il inverse input
H: 45 rpm |
L: 33rpm The gain set element is connected,
E12=% Vee