Kenwood DPC-885, Service Manual

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DPC-885
5
CIRCUIT DESCRIPTION
Pin No. Name I/O Function
91 LINE I Line out detection terminal
92 HOLD I HOLD switch on/off
93 LD O Laser diode output terminal
94 LIDSW I Cover open detection switch
95 XWIH O Write permission signal output for RL5C356
96 XEMP I Read prohibition signal input for RL5C356
97 XWRE I Write prohibition signal input for RL5C356
98 XQOK O CD sub code Q OK signal output for RL5C356
99 XLT O LATCH output to RL5C356
100 SQSO I CDQ code data input from CXD 3009Q
2. Test Mode
2-1 Setting the test mode
This model can be set to the test mode by shorting
the test-land of the X32 board.
START
Turn on lid
switch
Is test land
shorted?
Test mode
processing
Is key pushed?
Track No. "01"
is displayed.
TEST MODE YES
NO
NO
See following table.
Normal operation
No. Mode Key Name Function TRACK No. display
1 05
PLAY/PAUSE
(
6
)
1. Focus servo.....................................................................................................ON
2. Tracking servo.................................................................................................ON
3. Feed servo ......................................................................................................ON
Absolute time at position of limit SW is displayed in time area, then play is started.
05
After 1, 2 and 3 are
finished, track No.
played currently and its
play time are indicated.
2 03
UP
(
¢
)
1. Focus servo.....................................................................................................ON
2. Tracking servo...............................................................................................OFF
3. Feed servo ....................................................................................................OFF
03
3 01
STOP
(
7
)
1. Focus servo...................................................................................................OFF
2. Tracking servo...............................................................................................OFF
3. Feed servo ....................................................................................................OFF
✜
Test mode can be can celled while pressing the STOP (
7
) Key in 01 mode.
01
4
While pressing the
P. MODE/SEARCH Key,
turn the AC ON
All LCD is turned ON for 2 seconds.
ó
All LCD is turned OFF for 2 seconds.
ó
Returned to normal mode.
—
2-2 Key and functions avild in test mode
COVER/CIR/EXP-INT 98.4.24 2:57 PM y [ W 5