Kenwood DP-1100 B, Service Manual

Page: 93 / 159

DP-1100B II
2. IC OPERATION OF EACH CIRCUIT AND PIN DESCRIPTION
Pin No. Symbol I/O Waveform Description Remarks
60 DSLP 0
/ 1 3 8 ^ S \
5 v
( 50 nS
—-y 0 V
Data status signal output. (Error information signal output)
63 DAST 0
V I i i 11 11/ o V
138 nS
Data status signal output. (Error information signal output)
64
D I V -
0
138
ixS
Buffer memory status output.
Outputs an " H " signal when the jitter absorption buffer memory
enters range of + 2 or + 3 frames in its capacity of ± 4 frames.
This output is connected to pin DIV- of TC9178F (IC8) to lower the
disc motor revolution.
Connected to DIV —
(pin 5) of TC9178F
(IC8)
65 DIV + 0
138 nS
Buffer memory status output.
Outputs an " H " signal when the jitter absorption buffer memory
enters range of —2 or —3 frames in its capacity of ± 4 frames.
This output is connected to pin D I V + of TC9178F (IC8) to raise the
disc motor revolution.
Connected to DIV +
(pin 4) of TC9178F
(IC8)
66 BUSE 1
Buffer selection input pin.
Selects the output condition of DIV —/DIV + .
At " H " , D i v ± output are made when the buffer memory enters
range of ± 2 frames. |At " L " , D i v ± output are made when it enters
66 BUSE 1
range of ± 3 framesj
T a b l e 2 - 3 - 4 A
96