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A-1001
CIRCUIT DESCRIPTION
AMP u-COM: PD75004CU-199 (X11:IC1)
1. Initial Status
After the power is turned ON, the initial status will be as
follows:
POSITION = TUNER
CD DIRECT = OFF
MUTE = OFF
MUTE = ON (Sound is muted)
MUTE = OFF (Sound is not muted)
The VOLUME LED will blink for four seconds after the power
is turned ON, then it will stay lit.
2. Test Mode
2-1 Test Mode with the Main Unit Keys
(1
(2
) Setting Procedure
While pressing the CD DIR key, connect the AC outlet.
) Cancellation
Disconnect the AC outlet. The initial setting will take effect
and the test mode will be canceled.
(3) Description
oak,
. Auto POWER ON
When the AC outlet is connected while the CD DIR key is
held down, the POWER will turn ON and all function will
be at the initial setting.
. ALL LED ON Mode
When the AC outlet is connected while the CD DIR key is
held down, all the LEDs will light. Any key operation on
the main unit thereafter will return the LEDs to normal.
. Auto Motor VR UP/DOWN
When the CD DIR key is pressed during the test mode
set with the main unit keys, the motor VR will operate as
follows:
16 sec. UP - 16 sec. DOWN - STOP
During this motor operation, the CD DIR key will be inef-
fective.
. MUTE Signal Output
The MUTE signal will function normally.
2-2 Test Mode With Serial Communications
(1) Setting Procedure
Connect the AC outlet and enter the TEST ON code.
TEST ON (C27F)
(2) Cancellation
Enter the TEST OFF code or disconnect the AC outlet.
TEST OFF (C27E)
(3) Description
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. Other operations during the test mode (serial
communications)
During the test mode (serial communications), the main
unit's keys, remote controller keys, and normal serial
code will be ineffective.
. Required operations for the test mode (serial
communications)
The serial code for the test mode (serial communications)
can be used to check the operation of all circuits.
Refer to the test mode serial code table.
During the test mode (serial communications), the MUTE
signal is not output. This is for reducing the input-output
switching time during the measurement.
When a valid serial code for the test mode is received,
the code identical to the code entered will be output.
The code entered during the test mode (serial communi-
cations) will become valid regardless of the display mode.
For checking the MUTE operation, MUTE
has specific
codes.
MUTE ON (C20D)
MUTE ALL OFF (C20F)
To switch cyclically, enter the individual serial code.
Ex.: Enter the following two codes for SPEAKER ON/OFF.
SPEAKER ON (C21F)
SPEAKER OFF (C21E)
Set the motor VR UP/DOWN.
All LEDs will light. To cancel, enter the ALL LED ON
cancellation code. The LEDs will then return to normal.
ALL LED ON OFF (C27B)
All functions (including the test mode) will be initialized.
AMP INITIAL (C27D)
A-1001
CIRCUIT DESCRIPTION
2-3 Initial Settings
(1) Setting Procedure
(2) Description
Pin Connection
eT
1
Vss
(GND)
xXT2
2
L CD DIR
RESET
3
L, co
x1
4
tL TUNER
X2
S
L DECK
P ROT
L
6
tL MD/DAT
P ROT R
7
a
L AUX
S DATA
8
-
V LED
S BUSY
a,
P53
P81
O
P60
P80
+
P61
K POWER
5
P62
PO2
in
V UP
K CD DIR
~
V DOWN
BACK
UP
a
MUTE
HEAD
ON/OFF
er
SP
PROTECT
SEL
RELAY
P11
POWER
REMIN
T
ST
NC
T BT
Vdd
T CLK
Unused pin settings:
Open: XT2, P53 to P62, P80, P81
Vss Connected: XT1, P02, P11
Vpp Connected: NC
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