Md Section - Kenwood RXD-M32MD Service Manual

RXD-M32MD
QQ
3 7 63 1515 0

4-2 MD SECTION

1. Preparation for Adjustment
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.
Temperature
Repair(replace)
Standard Set
pickup
recording head
mechanism
pcb parts
MD microprocessor
MD LSI
RF IC
EEPROM
note: figures order of steps. - = no need.
* Result of EEPROM
OK_EEPROM
WR_EEPROM
TE
L 13942296513
NG_EEPROM
** Carry out the TEST-PLAY , TEST-REC and C1 error in test mode after AUTO_ADJ and AUTO_FAB.
1-2 Test disc
Type
1 High reflection disc TGYS1 (SONY)
2 Low reflection disc
3
2. Test Mode
1. Holding down the MD rec button and turn the power on. (State A)
2. To enter the test mode stop state(State B), press the STOP button.
3. Load the playback disc 1(high reflection disc) or recording disc 2(low reflection disc).
A
MD TEST
ó
(Press STOP key)
B
tsm
ó
(MD DISC LOAD IN)
C
LOADING
ó
D
AUT YOBI
www
Entering the specific mode
Whenever the SKIP DOWN
AUTO pre-adjustment
(AUT YOBI)
EEPROM setting
(EEPROM SET)
6
CIRCUIT DESCRIPTION
EEPROM set
Auto pre adj
value check
TEMP EEPROM_SET AUTO_YOBI AUTO_ADJ AUTO_FAB
- 1
- -
- 1
1 2
- 1
- -
1 2
1 2
Write the data of setting values and AUTO-pre adjustment perfectly.
Write the data of setting values perfectly however not write AUTO pre-adjustment.
Carry out AUTO-pre adjustment and write data to EEPROM.
Not write the data of setting values.
Check the connection of MD microprocessor and EEPROM.
Test disc
Recording minidisc
Head Adjusting transparent
e ---- TEST MODE STOP STATE
(When the STOP button is pressed in the D state, the indication B state is
restored.
To restore D state again, press the SKIP DOWN key once.
x ao
y
button is pressed, the mode is changed.
. i
AUTO adjustment
(AUTO AJST)
MANUAL adjustment
(MNU AJST)
8
Auto adj Auto Fab adj *EEPROM data write
2 3 4
- - -
2 3 4
3 4 5
- - -
1 2 3
3 4 5
3 4 5
Q Q
3 6 7 1 3
represents version of MD microcomputer
u163
.
AUT RESULT SUB
(AUT FAB) (RST YOBI)
MANUAL pre-adjustment
(MNU YOBI)
2 9 9 4 2 8
** Operation check
CANCEL TEST MODE TEST-PLAY TEST-REC
5 6
- -
5 6
6 7
2 3
4 5
6 7
6 7
1 5 0 5 8 2 9 9 4
m
co
RESULT
(RESULT)
9 9
7
1
7
8
4
6
8
8
2 8 9 9