Kenwood DP-1100 B Service Manual page 80

2. IC OPERATION OF EACH CIRCUIT AND PIN DESCRIPTION
Pin f u n c t i o n s
Pin No. Symbol I/O
-
1 NC
2 2 2 2 2 2 2 PCSA PCSA PCSA PCSA PCSA PCSA PCSA
I I I I I I I
3 3 3 3 3 3 3 PCSB PCSB PCSB PCSB PCSB PCSB PCSB
( (
4 4 DIV + DIV + I I
(Appears (Appears
low disc rotation.) low disc rotation.)
5 5 5 5 5 I I I I I
D I V - D I V - D I V - D I V - D I V -
(Appears (Appears (Appears (Appears (Appears
high disc rotation.) high disc rotation.) high disc rotation.) high disc rotation.) high disc rotation.)
6 6 6 6 DIVC DIVC DIVC DIVC I I I I
7 C21K I
TES-1 ~
8 - 1 0
I
TES-3
-
11 NC
12 EMPH 0
Waveform
-
Not connected
These inputs determines the phase comparison frequency.
Phase comparison frequency = 7 . 3 5 kHz (frame sync signal)/N
PCSA
L
H
L
H
Input for setting reference frequency division coefficient in APC signal
10.5/xS 10.5/xS
generation circuit for CLV servo control.
o v o v
Input as buffer memory status signal from TC9179F (IC6).
only only at at In addition, the varying amount is selectable by DIVC.
DIV + DIV + D I V - D I V -
L L
L
H
only only only only only at at at at at
H L
L L H H
L H
H H
* Don't care
2.1168 MHz input. This signal, the clock pulse obtained from
4-division of X'tal OSC frequency 8.4672 MHz, is input from
TC9179F (IC6). Its duty ratio is 50.
Test inputs, which operates normally at " H " or open state.
Not connected.
Output for emphasis presence/absence judgement represented by
control bit of sub-code signal Q.
" H " = de-emphasis ON
Table 2-3-3A
Description
PCSB N fc (Hz)
1 2 2 5
L 6
9 1 8 . 7 5
L 8
17 6 1 2 . 5
H
4 5 9 . 3 7 5
H 16
Reference f r e ­ Reference f r e ­
Disc m o t o r Disc m o t o r
DIVC DIVC q u e n c y division q u e n c y division
c o e f f i c i e n t c o e f f i c i e n t
*
1 / 2 8 8
L 1 / 2 8 7 . 5
H 1 / 2 8 7
L L 1 / 2 8 8 . 5 1 / 2 8 8 . 5
H 1 / 2 8 9
#
1 / 2 8 8
D P - 1 1 0 0 B II
Remarks
Connected to each of Connected to each of Connected to each of Connected to each of Connected to each of Connected to each of Connected to each of Connected to each of Connected to each of Connected to each of Connected to each of
TC9179F D I V + TC9179F D I V + TC9179F D I V + TC9179F D I V + TC9179F D I V + TC9179F D I V + TC9179F D I V + TC9179F D I V + TC9179F D I V + TC9179F D I V + TC9179F D I V +
65) and D I V - 65) and D I V - 65) and D I V - 65) and D I V - 65) and D I V - 65) and D I V - 65) and D I V - 65) and D I V - 65) and D I V - 65) and D I V - 65) and D I V -
64) 64) 64) 64) 64) 64) 64) 64) 64) 64) 64)
s p e e d s p e e d
Higher
Higher
L o w e r L o w e r
L o w e r
Connected to CK2M
(pin 56) of TC9179F
(IC6)
Pullup resistor incor­
porated
(pin (pin (pin (pin (pin (pin (pin (pin (pin (pin (pin
(pin (pin (pin (pin (pin (pin (pin (pin (pin (pin (pin
8 3