Kenwood MDX-F1 Service Manual page 8

MDX-F1
Port # Port Name
68,69 NC
70 PCNTO
71 EJECT
72 LDON
73 A/B
74 SBSY
75 DAPON
76 DFSO
77 DFSI
78 5/3
79 C/N
80 XRST
81 ADMUTE
82 LD+
83 LD-
84 MUTE
85 DOUT MT
86-88 TEST(2-0)
89 AVCK3
90 AVCK2
91 AVCK1
92 DTEMP
93 MINF
94,95 TEST(K1-K2)
96 GND
97 NC
98 VREF
99 AVCC
100 PR
7. Test Mode
7-1 Setting
Mode
AUX
TUNER
CD
MD -1
* TAPE
*** FTC & sub clock oscillation
MD-2
* Operation & Display in Test Mode
E E E E CrO2 detection
Half detection
FWD misrecord detection
RVS misrecord detection
** In Tape Mode, 4 seconds recording mode only.
*** FTC & Sub clock Oscillation
a) Check the oscillation(yes or no, period)before FTC test mode.
b) Check is 5 times by 200ms. FTC test mode is carried out if one time is OK.
c) Display shows error message as follows and test mode will be stop.
No oscillation
7-2 Cancel
a. Cancel the test mode and initialize the unit if pull out the power cord from AC outlet.
b. Cancel the test mode only if the power switch is off.
7-3 Operation in Test Mode
a. Muting does not work except power on/off.
b. No display demo mode.
c. Key is different operation from normal mode.
8
CIRCUIT DESCRIPTION
I/O
O No use
O Power control output port
O No use
O Laser diode on signal port(H:ON)
I AD/DA converter selector (in or out)
I Synchro signal input port
O No use
O No use
O No use
I GND
I GND
O MD LSI reset signal port
O AD muting port
O Loading motor positive control port
O Loading motor negative control port
O Muting signal output port
O No use
I No use
I Power supply monitor of motor driver
I Power supply monitor of AD/DC converters
I Power supply monitor of head circuit
I Temperature monitor port
I Disc, rec window,mechanism position
I No use
- GND
O No use
I +3.2V
I +3.2V
I GND
Key
SOUND
TUNER
CD PLAY Insert the AC power cord with pressing
MD PLAY the left key
TAPE PLAY
MENU
SET
H= sw off (E)
L= sw off (-)
î ERR 1 Poor period î ERR 2
Description
Setting
**TAPE REC key
Remarks