Kenwood DP-4090 Service Manual page 8

DP-4090/5090/D-S300
Pin No. Name
64, 65 NC
66 GFS
67 NC
68 VDD
69 X2
70 X1
71 IC
72 XT2
73 FOK
74 AVDD
75 AVREF0
76 50 / 40
77, 78 A / D0 ,A/D1
79 PEAK
80 RMUTE
2. Test mode
2-1 Setting the test mode
÷ The microprocessor built in the unit can be put to TEST
MODE by just pressing the UP key when set to power on.
2-2 Key vs Function in test mode
keys
UP ¢
(Keep to press up
key and AC ON)
PLAY/PAUSE 6
UP ¢
* FF 1
* FB ¡
* STOP 7
*
* PEAK SEARCH
DOWN 4
* DP 4090/DP-5090 only
The following keys are not operate in the test mode.
• TEXT DISPLAY KEY (DP-4090/DP-5090)
• REPEAT / RANDOM KEY (D-S300)
8
DIRCUIT DESCRIPTION
I/O
O No used
I Frame signal input from CXD2507AQ
O No used
– Power supply (+5V)
– system clock input
I system clock input
– GND
– No used
I F.OK signal input
– Vdd
I Vdd
I Model discrimination
I A/D key input
I A/D peak search input
O Analog mute control
Display
TEST Tray opens automatically.
(1) Focus servo – – – – ON
8 30 – – : – –
(2) Tracking servo – – OFF
(3) Feed servo – – – – OFF
(1) Focus servo – – – – ON
‰ 05 00 : 00
(2) Tracking servo – – – ON
(3) Feed servo – – – – – ON
î FL all light up î dot demonstration mode ì
ììì normal test mode indication íìììì
Move the pick - up to the direction of the outer circumfer-
FEED OUT
ence.
Move the pick - up to the direction of the inner circumfer-
FEED IN
ence.
TEST 00 Disc will be stopped.
8 BIT SYNC 8 bit sync and 16 bit sync will be displayed by changing
16 BIT SYNC the SL16/XS8 switch on the rear panel.
Change the output level cyclically.
ì Max î -10dB î Min
ììììììíììììì
‰ 01
Cancellation of the test mode and 01 play.
Description
Description
Active
5V : D-S300 / 2. 5V : DP-5090 /
0V : DP-4090
Remarks
Setting the test mode
TE-balance adjustment
Focus gain / Tracking
gain and FE- balance
adjustment