Kenwood MDX-F1 Service Manual

MDX-F1
10
CIRCUIT DESCRIPTION
Repair(replace)
Temperature
Standard Set
EEPROM set
value check
Auto pre adj Auto adj Auto Fab adj *EEPROM data write ** Operation check
TEMP EEPROM_SET AUTO_YOBI AUTO_ADJ AUTO_FAB CANCEL TEST MODE TEST-PLAY TEST-REC
pickup - 1 2 3 4 5 6 7
recording head - - - - - - - 1
mechanism - 1 2 3 4 5 6 7
pcb parts 1 2 3 4 5 6 7 8
MD microprocessor - 1 - - - 2 3 4
MD LSI - - 1 2 3 4 5 6
RF iC 1 2 3 4 5 6 7 8
EEPROM 1 2 3 4 5 6 7 8
1. Preparation for Adjustment(MD-2)
You have to carry out the following test mode items if replace MD mechanism, pickup, head and pc board.
1-1 Procedure
1. Short-circuit #4(vss) and #7(wp) of IC1402(EEPROM).
2. Set the unit to test mode and carry out the every adjustment in test mode.
3. Stop the test mode by pressing the STOP key for 3 secs
4. Remove the short circuit of IC1402. Carry out reset start.
note: figures order of steps. - = no need.
* Result of EEPROM
OK_EEPROM Write the data of setting values and AUTO-pre adjustment perfectly.
WR_EEPROM Write the data of setting values perfectly however not write AUTO pre-adjustment.
Carry out AUTO-pre adjustment and write data to EEPROM.
NG_EEPROM Not write the data of setting values.
Check the connection of MD microprocessor and EEPROM.
** Carry out the TEST-PLAY , TEST-REC and C1 error in test mode after AUTO_ADJ and AUTO_FAB.
7-4-4 MD SECTION
1-2 Test disc
Type Test disc
1 High reflection disc TGYS1 (SONY)
2 Low reflection disc Recording minidisc
3 Head Adjusting transparent
2. Test mode
Test mode setting method
1. Holding down the SET button and turn power on.
(State A )
2. Insert the playback disc 1 (high reflection disc) or recording disc 2 (low reflection disc).
(State B is set.)
(During disc loading : display LOADING)
Thus, the test mode state is set.
A
tsm
e : TEST MODE represents version of MD microcomputer.
TEST STOP state (When the (STOP) button is ressed in the A state, the indication
C
is restored. To restore B again, press the MD REC button.)
B AUT
YOBI
C
MD
TEST
Entering the specific mode
Whenever the buttonMD REC is pressed, the mode is changed.
AUTO
(AUT YOBI) (AUTO AJST) (AUT FAB) (RST YOBI) (RESULT)
(MNU YOBI)(EEPROM SET) (MNU AJST)
pre-adjustment AUTO adjustment RESULT SUB RESULT
EEPROM setting MANUAL adjustment MANUAL pre-adjustment
AUT

Kenwood MDX-F1 Specifications

Amplifier Section

rated output power during STEREO operation	4 W + 4 W
speaker unit	80 mm, cone type

Tuner Section

FM tuning frequency range	87.5 MHz ~ 108 MHz
MW (AM) tuning frequency range	531 kHz ~ 1, 602 kHz

General Specifications

power consumption	38 W
standby power consumption	0.3 W
dimensions (W x H x D)	464 mm x 182 mm x 243 mm
weight (net)	5.4 kg