Denon UD-M31 Service Manual page 13

LC78625E Terminal Function
Pin No. Symbol I/O
1 DEFI I Defect detection signal (DEF) input (This pin must be connected to 0 V if unused.)
2 TAI I
3 PDO O
VV
4
SS PLL pins
5 ISET AI
VV
6
DD
7 FR AI
8 VSS Digital system ground. (This pin must be connected to 0 V.)
9 EFMO O
10 EFMO O Slice level control
11 EFMIN I
12 TEST2 I Test input. A pull-down resistor is built in. This pin must be connected to 0 V in normal operation.
+
13 O Spindle servo control output. Acceleration when CLV+ is high, deceleration when CLV- is high.
CLV
-
14 O Three-value output is also possible when specified by microprocessor command.
CLV
Rough servo/phase control automatic switching monitor output. Outputs a high level during rough servo and a low
15 V/P O
level during phase control.
16 FOCS O Focus servo on/off output. Focus servo is on when the output is low.
17 FST O Focus start pulse output. This is an open-drain output.
18 FZD I Focus error zero cross signal input. (This pin must be connected to 0 V if unused.)
19 HFL I Track detection signal input. This is a Schmitt input.
20 TES I Tracking error signal input. This is a Schmitt input
21 PCK O EFM data playback clock monitor. Outputs 4.3218 MHz when the phase is locked.
Synchronization signal detection output. Outputs a high level when the synchronization signal detected from the
22 FSEQ O
EFM signal and the internally generated synchronization signal agree.
23 TOFF O Tracking off output
24 TGL O Tracking gain switching output. Increase the gain when low.
25 THLD O Tracking hold output
26 TEST3 I Test input. A pull-down resistor is built in. (This pin must be connected to 0 V.)
V
27 Digital system power supply.
DD
Track jump output. A high level output from JP+ indicates acceleration during an outward jump or deceleration dur-
+
28 O
JP
ing an inward jump.
A high level output from JP- indicates acceleration during an inward jump or deceleration during an outward
-
29 O
JP
jump.Three-value output is also possible when specified by microprocessor command.
Sound output function input used for end product adjustment manufacturing steps. A pull-down resistor is built in.
30 DEMO I
(This pin must be connected to 0 V.)
31 TEST4 I Test input. A pull-down resistor is built in. (This pin must be connected to 0 V.)
32 EMPH O De-emphasis monitor pin. A high level indicates playback of a de-emphasis disk.
33 LRCKO O
34 DFORO O
Digital filter outputs
35 DFOLO O
36 DACKO O
37 TST10 O Test output. Leave open. (Normally outputs a low level.)
ASDACK When antishock
38 I/O
/P0 mode is not
used,these pins are
ASDFIN/
39 I/O
used as general pur-
P1
pose I/O ports (P0 to
ASDEPC
P3). They must either
40 I/O
/P2
be set to input mode
and connected to 0 V,
or set to output mode
ASLRCK/
41 I/O
and left open, if
P3
unused.
Function
Test input. A pull-down resistor is built in. (This pin must be connected to 0 V in normal
operation.)
External VCO control phase comparator output
Internal VCO ground. (This pin must be connected to 0 V.) PLL pins
PDO output current adjustment resistor connection
Internal VCO power supply.
VCO frequency range adjustment
EFM signal inverted output
EFM signal output
EFM signal input
Word clock output
Right channel data output
Left channel data output
Bit clock output
The antishock inputs in antishock
mode.
13
Bit clock input
Left and right channel data input
Sets the built-in de-emphasis filter on or off.(High:
on, low: off)
L/R clock input
UD-M31 13