Kenwood DP-1100 B Service Manual page 65

D P - 1 1 0 0 B II
2. IC OPERATION OF EACH CIRCUIT AND PIN DESCRIPTION
Pin f u n c t i o n s
Pin No. Symbol
Tracking error pulse con­
1 TEP
trol output
Tracking Tracking Tracking Tracking
2 2 2 2
TEG2 TEG2 TEG2 TEG2
control (1) input control (1) input control (1) input control (1) input
Tracking Tracking Tracking
6 6 6 TEG1 TEG1 TEG1
control (2) input control (2) input control (2) input
Tracking
3 TEON
output
Tracking
4 TEOP
output
Tracking error polarity in­
5 TES
dication input
7 TTAC Track TAC output
PU motor control input
8 PUD
9 OPNS Open/close output
10 DSG Data slice control input
6 8
Pin name
IN/OUT
Outputs a " H " signal only during play. However, it becomes " L " when
0
the kick signal is output during play.
TEG1
error error error error detector detector detector detector
I I I I I I I
error error error detector detector detector
error negative
When TS2 advances in edge phase against T S 1 , outputs a " L " signal
0
(at normal operation).
error positive
When TS2 delays in edge phase against T S 1 , outputs a " H " signal (at
0
normal operation).
I Control signal input used in kick control for search operation
Pin outputs clock pulse which the microprocessor is informed of com­
0
pletion of kick or the count number of tracks.
Input which stops the PU motor only when the PU motor compulsory-
I
carry signal is a specific code ... (PUD = " H " ) .
Output for disc tray drive motor open-close control signal.
0
" L " = open, " H " = close, HiZ = OFF
Input for control signal which stops the sub-control of the data slice
circuit.
I
" H " input = OFF.
Description
TEG2 Function
Tracking error detection and normal oper­
H H
ation
TEOP outputs a " H " signal at the timing
of the absolute phase difference between
L
H
TS1 and TS2.
TEON is fixed to " H " .
TEON outputs a " L " signal at the timing
of the absolute phase difference between
H L
TS1 and TS2.
TEOP is fixed to " L " .
Stop of tracking error detection. TEOP is
L L
fixed to " L " .
TEON is fixed to " H " .
Table 2 - 2 A
Remarks
Pullup Pullup Pullup Pullup Pullup Pullup Pullup resistor resistor resistor resistor resistor resistor resistor
incorporated incorporated incorporated incorporated incorporated incorporated incorporated
Pullup resistor
incorporated
3-state output
Pullup resistor
incorporated