Kenwood HM-531MD User manual

(HM-531/581MD)
MICRO HiFi COMPONENT SYSTEM
RXD-M51/M51MD
SERVICE MANUAL
© 1998-9/B51-5477-00 (K/K) 2138
• Refer to DM-3090 service manual(B51-5396-00), if
require the following items in detail.
1) MD mechanism(MDM-98A) disassembly for repair
(page5,6)
2) Semiconductor description
IC1101:RF signal control(page9)
IC1201:ENDEC/ATRAC(page10,11)
IC1401:system microcomputer(page 12,13)
Caution : No connection of ground line if disassemble the
unit.
Please connect the ground line on rear panel,
PCBs, Chassis and some others.
KENWOOD-Crop. certifies this equipment conforms to DHHS
Regulations No. 21 DFR 1040. 10, Chapter 1, Subchapter J.
DANGER : Laser radiation when open and interlock defeated.
AVOID DIRECT EXPOSURE TO BEAM
Illustration is RXD-M51MD.
* Refer to parts list on page 49.
MD 6
TUNER
micro hi-fi component systemAuto Reverse
AUX
push
OPEN
MD rec
DISC LOADING MECHANISM
TAPE/preset band
1BIT DUAL D/A CONVERTER
TAPE rec
remote
TAPE
direction
set/demo
menu
repeat
sound
standby/timer
on/standby
3
d
o
w
n
u
p
2
V
O
L
U
M
E
/
m
u
l
t
i
c
o
n
t
r
o
l
phones
CD 6
74
1¡
¢
0
0
2 3
Panel
(A60-1496-11)
Indicator
(B12-0351-03)
Knob
(K29-6358-14)
Knob
(K29-7394-03)
Front glass
(B10-3419-14)
Miniature phone jack
(E11-0344-05)
Front glass
(B10-3418-03)
Dressing panel
(A21-3707-03)
Dressing panel
(A21-3721-03)
Knob
(K29-7392-02)
Panel (MD)
(A29-1022-04)
Knob
(K29-7393-03)
RXD-M51MD(K)COVER1,1P( 98.12.1019:11 y[W 2

SYSTEM MAIN UNIT DESTINATION SPEAKER SP CORD PARTS.NO.
HM-581MD RXD-M51MD E1T1 LS-M61 E30-5500-05
HM-531 RXD-M51 M1E2T2 LS-M51 E30-5500-05
Operation to reset
The microcomputer may fall into malfunction (impossibil-
ity to operate, erroneous display, etc.) when the power
cord is unplugged while unit is ON or due to an external
factor. In this case, execute the following procedure to
reset the microcomputer and return it to normal condi-
tion.
Unplug the power cord from the power outlet then, while
holding the “set/demo” key depressed, plug the power
cord again.
÷ Please note that resetting the microcomputer clears the
contents stored in and it returns to condition when it left
the factory.
set/demo
Batteries (R6/AA) (2)
Other countries
Remote control unit (1)
AM loop antenna stand (1)
Speaker cords (2)
Loop antenna (1) (T90-0833-05)
Please confirm that the following accessories are present.
FM indoor antenna (1)
Europe U.K. and Russia
AC plug adapter (1)
Use to adapt the plug on the power
cord to the shape of the wall outlet.
(Accessory only for regions where
use is necessary.
(T90-0810-05): TE
(E03-0115-05)
(E30-5500-05)
(A70-1236-05) : RC-M0503E Remote control unit (1) (A70-1242-05) : RC-F0503E Remote control unit (1) (A70-1241-05) : RC-F0503
(T90-0801-05): M (J19-3645-05))
¢
REMOTE CONTROL UNIT
RC-F0503E
SLEEP TONE SOUND
1 2 3 TIMER 4 5 6 REPEAT 789
RANDOM
+10 0 PGM CLEAR
DOT DISP.TIME DISP.
TAPE
P.CALL
TAPE TUNER
BAND CD
PTY
TA/NEWS
AUX
SET ENTER MUTE
¡4
2 3 7
%
fi
6
1
POWER
VOLUME
O.T.E.
TRACK
EDIT
TITLE
INPUT
TITLE
SEARCH
TIMER
RANDOM
CLEAR
DELETE
REPEAT
6CD
6
TUNER
BAND
SET
DOT/CHARA.
TIME ENTER
SLEEP
123 456 789
+10 0
DOLBY NR
QUICK
MOVE
TAPE
PTY
TA/NEWS
AUX
¢
P.CALL
4
2 3
PGM
¡1
REMOTE CONTROL UNIT
RC-M0503E
SOUNDTONEMDTAPE
MD 7
%
fi
MUTE
V
O
L
U
M
E
C
O
N
T
R
O
L
DISPLAY
O.T.E.
POWER
¢
REMOTE CONTROL UNIT
RC-F0503
SLEEP TONE SOUND
1 2 3 TIMER 4 5 6 REPEAT 789
RANDOM
+10 0 PGM CLEAR
DOT DISP.TIME DISP.
TAPE
P.CALL
TAPE TUNER
BAND CD
AUX
SET ENTER MUTE
¡4
2 3 7
%
fi
6
1
POWER
VOLUME
O.T.E.
RXD-M51/M51MD
2
CONTENTS / ACCESSORIES / CAUTION
CONTENTS / ACCESSORIES / CAUTION.................2
EXTERNAL VIEW/DISASSEMBLY FOR REPAIR.......3
BLOCK DIAGRAM.......................................................4
CIRCUIT DESCRIPTION.............................................5
ADJUSTMENT.......................................................... 11
WIRING DIAGRAM....................................................12
PC BOARD ................................................................13
SCHEMATIC DIAGRAM............................................23
EXPLODED VIEW .....................................................45
PARTS LIST...............................................................49
SPECIFICATIONS.....................................................59
Accessories
Caution
System configuration
Contents
RXD-M51MD(K)COVER1,1P( 98.12.1019:11 y[W 3

1
2
3
Phono jack
(E63-1024-05)
Lock terminal board
(E70-0053-05)
Power cord bushing
(J42-0083-05) AC power cord *
(E30-)
Lock terminal board
(E70-0052-05)
RXD-M51/M51MD
3
EXTERNAL VIEW / DISASSEMBLY FOR REPAIR
DISASSEMBLY FOR REPAIR
Illustration is RXD-M51MD.
* Refer to parts list on page 49.
< How to check the PCB >
See the left figure, connect the SP terminal GND and the rear
panel (1), the front panel GND and the rear panel (2), MD
mecha chassis and the rear panel (3) (except RXD-M51) with
the wires connected alligator chips.
EXTERNAL VIEW
RXD-M51MD(K)COVER1,1P( 98.12.1019:11 y[W 6

RXD-M51/M51MD
4
BLOCK DIAGRAM
(X33)
(X14)
ONLY
(X09)
A301 (W02-)
(X14)
ONLY
E,T TYPE
(X33)
(X07)
RXD-M51MD
RXD-M51
RXD-M51
ONLY
RXD-M51MD
200mV/47k
AUX IN
AUX IN ATT
3dB
FM
AM
ANT TUNER PACK
ERASE
R/P BIAS TRAP
MPX
OSC
BIAS Q11,12
IC1 IC2
IC3
FE-BIAS
VR201
(RF-AMP)
CXA1571M
IC203
CXD2587Q
(DSP/DAC/CD-TEXT)
IC201
(4ch BTL-DRIVER)
BA5979S
IC202
MECHA.
CD
DIGITAL OUT
UPD7805BGC-A59
MD MECHA.
IC1 DIGITAL IN
(LEVEL SHIFT)
TC74HCT7007AF
RDS
(MAIN u-COM)
IC205
IC206
REMOTE FL
FL
DRIVER
(A/D)
KEY ENCODER ROTARY C0NTROL LED
MID
TREBLE
BASS
EX. BASS
LOUD
J1
HEADPHONES
AMP
POWER
D1
38V
AVR
D2
+12V
AVR
+8V
AVR
D3
P. T.
T1
+5.6V
AVR
D16-21
DECK MECHA
DECK ANALOG
TUNER
AUDIO
CD BTL-DRIVER
MD ANALOG
MD MECHA. DIGITAL
CD DSP. RF-AMP
FL DRIVER DISPLAY
MD u-COM
MAIN u-COM
IC1
S1 Q1-6
IC2
A1
IC3
MD MECHA.
MDM-98A
IC5
IC4
Q3,4
Q5-16
PROTECTION
CIRCUIT
Q17-21
FL
Q32,35
Q27-29
Q30,31
+5V
AVR
Q208
Q205
+5V
AVR
Q7,8
AVR
+6.5V/5V
Q9
AVR
+6V
+5V
AVR
Q201,202
FL FILAMENT
AC4.5V
K1
POWER
RELAY
Q33
AC IN
DIGITAL OUT A201
DECK
SP. OUTPUT
M,E,T 12.25V/6 (10%)
POWER RELAY
J1
CONTROL u-COM
L3,4
SPEAKERS
D5
ED1
MECHA.
DECK
425mV
FE
TE
SI
RF
FFDR
FRDR
TFDR
TRDR
SFDR
SRDR
MDP
Rch-OUT
Lch-OUT
PB AMP
REC AMP
DOLBY B OUT 580mV
IN
R/P (REC=H)
DOUT
RESET
(FCS.TRK.SLD.SFD-DRIVE)
DSCK
RESET
PDOWN
MD-ST
SERCH
KDATA U.T.D
U.K.D
X1
X1
X2
DSTB
MDDATA
LOAD SW
MD R.D
MD T.D
+
+
+
+
+
5.0V
3.3V
1.2V1.8V
+3dB
MUTE
200mV
DOLBY
DECK
TUNER
AUX
CD
MD
850mV
+12V
(5MHz)
850mV
RXD-M51MD(K)COVER1,1P( 98.12.1019:11 y[W 7

RXD-M51/M51MD
5
CIRCUIT DESCRIPTION
1. Initialization
1-1 Setting of initial conditions
While pressing the [SET] key, plug the AC power cord
into an AC power outlet.
1-2 Initializing operation
•A microcomputer is initialized for start when the AC
power is turned on while pressing the [SET] key. At
that time, CD mechanism, MD mechanism and CAS-
SETTE mechanism are also initialized.
•During the initial operation, the display shows “INITIAL-
IZE”and after that the clock blinks up on display.
1-3 Initial items and back up data
1-4 Mechanism initialization
1-4-1 CD mechanism
•If a mechanism error occurs, “C”is indicated on the
display.
1-4-2 MD mechanism
•The MD ON code is input within 4 seconds after turned
the power port on, the MD initial code (D122H) is out-
put.
If the MD on code is not input, the error indication is
displayed as "M" on the display.
1-4-3 CASSETTE mechanism
• If a mechanism error occurs, "X" is indicated on the dis-
play.
ch Destination
K2 E2 E1/H
1 FM 97.50MHz FM 97.50MHz FM 97.50MHz
2 FM 108.00MHz FM 108.00MHz FM 108.00MHz
3 AM 630kHz AM 630kHz AM 630kHz
4 AM 1000kHz AM 999kHz AM 999kHz
5 AM 1440kHz AM 1440kHz AM 1440kHz
6 AM 1610kHz AM 1602kHz AM 1602kHz
7 FM 87.50MHz FM 87.50MHz FM 87.50MHz
8 FM 87.50MHz FM 87.50MHz FM 87.50MHz
9 FM 87.50MHz FM 87.50MHz FM 87.50MHz
10 FM 89.10MHz FM 89.10MHz FM 89.10MHz
11 FM 87.50MHz FM 87.50MHz FM 87.50MHz
12 FM 90.00MHz FM 90.00MHz FM 90.00MHz
13 FM 106.00MHz FM 106.00MHz FM 106.00MHz
14 AM 530kHz AM 531kHz AM 531kHz
15 FM 87.50MHz FM 87.50MHz FM 87.50MHz
16 FM 98.00MHz FM 98.00MHz FM 98.00MHz
17 FM 98.50MHz FM 98.50MHz FM 98.50MHz
18 FM 87.50MHz FM 87.50MHz FM 87.50MHz
19 AM 990kHz AM 990kHz AM 990kHz
20 FM 97.40MHz FM 97.40MHz FM 97.40MHz
21 FM 87.50MHz FM 87.50MHz FM 87.50MHz
22 FM 87.50MHz FM 87.50MHz FM 87.50MHz
23 FM 87.50MHz FM 87.50MHz FM 87.50MHz
24 FM 87.50MHz FM 87.50MHz FM 87.50MHz
25 FM 87.50MHz FM 87.50MHz FM 87.50MHz
26 FM 87.50MHz FM 87.50MHz FM 87.50MHz
27 FM 87.50MHz FM 87.50MHz FM 87.50MHz
28 FM 87.50MHz FM 87.50MHz FM 87.50MHz
29 FM 87.50MHz FM 87.50MHz FM 87.50MHz
30 FM 87.50MHz FM 87.50MHz FM 87.50MHz
31 FM 87.50MHz FM 87.50MHz FM 87.50MHz
32 FM 87.50MHz FM 87.50MHz FM 87.50MHz
33 FM 87.50MHz FM 87.50MHz FM 87.50MHz
34 FM 87.50MHz FM 87.50MHz FM 87.50MHz
35 FM 87.50MHz FM 87.50MHz FM 87.50MHz
36 FM 87.50MHz FM 87.50MHz FM 87.50MHz
37 FM 87.50MHz FM 87.50MHz FM 87.50MHz
38 FM 87.50MHz FM 87.50MHz FML 74.00MHz
39 FM 87.50MHz FM 87.50MHz FML 65.00MHz
40 FM 87.50MHz FM 87.50MHz FML 69.00MHz
2. TUNER preset frequency
ITEMS
POWER OFF
VOLUME 15
BALANCE CENTER
LOUDNESS OFF
AMP EX. BASS ON
INPUT SEL TUNER
AUX INPUT 0 (-6dB)
BASS 0
TREBLE 0
BAND FM
LAST f LIMIT
TUNER LAST Pch
AUTO/MONO AUTO
Pch TEST f
CLOCK AM 12 : 00
PROG ON AM 12 : 00
CLOCK PROG OFF AM 12 : 00
TIMER PRO MODE PLAY
SOURCE TUNER
Pch 1
EXE OFF
OTT OFF
SLEEP OFF
PLAY MODE TRACK
REPEAT OFF
CD RANDOM OFF
PLAY MODE STOP
TIME SINGLE
DIRECTION FORWARD
DECK RVS MODE p
DOLBY NR OFF
OPERATION MODE STOP
back up data
4. Main microprocessor M30622MA-174FP (X09 : IC205)
4-1 Microprocessor periphery block diagram
4-2 Key matrix
Vref = 5V ( ) of KEY : RXD-M51
Desti- U-COM Discrimination Receiving frequency Channel PORT
nation Desti- DSW4 DSW3 DSW2 Band range space IF RF 92
nation
K, P K1 0 0 0 FM 87.5MHz~108.0MHz 100kHz +10.7MHz 25kHz 0
AM 530kHz~1700kHz 10kHz +450kHz 10kHz 0
M, Y K2 0 1 1 FM 87.5MHz~108.0MHz 100kHz +10.7MHz 25kHz 1
AM 530kHz~1610kHz 10kHz +450kHz 10kHz 0
JJ00 FM 76.0MHz~108.0MHz 100kHz -10.7MHz 25kHz 0
AM 531kHz~1629kHz 9kHz +450kHz 9kHz 0
QFMH 87.5MHz~108.0MHz 50kHz +10.7MHz 10kHz 0
QRDS 1 0 FML 65.0MHz~74.0MHz 10kHz +10.7MHz 10kHz 0
AM 531kHz~1602kHz 9kHz +450kHz 9kHz 0
E, T E1 110
FM 87.5MHz~108.0MHz 50kHz +10.7MHz 25kHz 0
RDS AM 531kHz~1602kHz 9kHz +450kHz 9kHz 0
3. Destination list of TUNER (DSW4=50pin, DSW3=49pin, DSW2=48pin)
0=(input low) 1=(input high)
GC-E6003
X09,
IC203
X14, IC1 X14
Q1~6
X09
IC4
X09
IC1
X09, IC2
X09
A301 X09
IC206 E TYPE ONLY
X09
IC205
CD mechanism
Mechanism
control
circuit Mechanism
control
circuit
Auto reverse
cassette
mechanism
Head amp
Dolby B
CXD2587Q
CD-DSP
TUNER
PLL IC
LC72131M
AUDIO
AMP SYSTEM IC
(LC75396)
MD
MDM-98A
LED
X14 ED1
FL
CM1740M Key matrix
encoder
remocon
RDS
demodu-
lator
DOT driver
LC75710NED LED driver
M30622MA-174FP
u-COM
VOLTAGE
[V]
RXD-M51MD(K)COVER1,1P( 98.12.1019:11 y[W 10

RXD-M51/M51MD
6
CIRCUIT DESCRIPTION
Pin No. Name I/O Description
1 CE O SYSTEM IC(LC75396)/PLL IC(LC72131) CE
2 PLL DO I PLL DATA INPUT
3 SD I TUNER SD DETECT INPUT H : NO TUNED L : TUNED
4 STEREO I TUNER STEREO DETECT INPUT H : MONO L : STEREO
5 EMPHASIS O TUNER EMPHASIS CHANGEOVER H : FM100kHz L : AM 50kHz
6 RDS DATA I RDS DATA INPUT H : 1 L : 0
7 CE I AC OFF DETECT INPUT H : AC ON L : AC OFF
8 BYTE I CONNECT GND
9 CNVSS I CONNECT GND
10 XCIN I TIMMER CLOCK(32.768kHz)
11 XCOUT O TIMMER CLOCK(32.768kHz)
12 RESET I U-COM RESET H : NORMAL L : RESET
13 XOUT O MAIN CLOCK
14 VSS – GND
15 XIN I MAIN CLOCK
16 VCC – 5V POWER SUPPLY
17 NMI I CONNECT 5V
18 REMOCON I REMOCON INPUT INTERRUPT BY H L
19 RDX CLK I RDS CLK INPUT INTERRUPT BY L H
20 SCOR I SUB CODE SYNCHRO SIGNAL INTERRUPT BY H L (CXD2587Q)
21 CD DC OFF O CD DSP POWER SUPPLY CONTROL H : OFF L : ON
22 SCLK O CD SENSE DATD READ OUT CLOCK (CXD2587Q)
23 SENSE I CD SENSE INPUT (CXD2587Q) H : 1 L : 0
24 CD CLK O CD DSP LOCK (CXD2587Q)
25 XLAT O CD DSP LATCH OUTPUT (CXD2587Q) L : LATCH
26 CD DATA O CD DSP DATA OUTPUT (CXD2587Q) H : 1 L : 0
27 CD RST O CD DSP RESET OUTPUT (CXD2587Q) H : NORMAL L : RESET
28 SQCK O CD SUB CODE CLOCK (CXD2587Q)
29 SUBQ I CD SUB CODE INPUT (CXD2587Q)
30 NC O NO USED
31 FL DATA O FL DRIVER DATA OUTPUT (LC75710NE)
32 NC O NO USED
33 FL CLK O FL DRIVER CLOCK (LC75710NE)
34 CD MUTE I CD MUTE INPUT (CXD2587Q)
35 MD TXD O TRANSMISSION DATA OUTPUT TO MD (UART)
36 MD RXD I DATA INPUT FROM MD (UART)
37 LCD O CD LASER OUTPUT CONTROL H : OFF L : ON
38 NC O NO USED
39 MD RST O MD RESET OUTPUT H : NORMAL L : RESET
40 CD MON O CD MON OUTPUT H : ON L : OFF
41 NC O NO USED
42 MDP SHORT O SAME CD POWER SIGNAL H : OFF L : ON
43 DOOR OPEN I CD DOOR SWITCH INPUT H : OPEN L : CLOSE
44,45 NC O NO USED
46 DSW0 I DESTINATION DISTINCTION (MODEL) H : RXD-M51 L : RXD-M51MD
47 DSW1 I DESTINATION DISTINCTION (DOLBY) H : NO DOLBY L : DOLBY NR
48-50 DSW2-DSW4 I DESTINATION DISTINCTION (TUNER)
51 FL RST O FL DRIVER RESET OUTPUT (LC75710NE) H : NORMAL L : RESET
4-3 Pin description of main microprocessor: M30622MA-159FP
Pin No. Name I/O Description
52 MD CE O MD CE CONTROL L : CE
53 ENC1 I ROTARY ENCODER1 (VOL. INPUT A)
54 ENC2 I ROTARY ENCODER2 (VOL. INPUT B)
55 LED5 O LED OUTPUT D2 SELECTOR MD /TUNER H : ON L : OFF
56 LED4 O LED OUTPUT D1 SELECTOR CD H : ON L : OFF
57 LED3 O LED OUTPUT D5(RED) TIMER H : OFF L : ON
58 LED2 O LED OUTPUT D5(GRN) STANDBY H : OFF L : ON
59 LED1 O LED OUTPUT D3 TAPE DIRECTION(FWD) H : ON L : OFF
60 LED0 O LED OUTPUT D4 TAPE DIRECTION(RVS) H : ON L : OFF
61 FL CE O FL DRIVER CE OUTPUT (LC75710NE)
62 VCC – POWER SUPPLY
63 NC O NO USED
64 VSS – GND
65 A/B-2 O DECK ACTIVITY CHOICE MODE (HA12219NT)
66 A/B-1 O DECK ACTIVITY CHOICE MODE (HA12219NT)
67 CPM O DECK MOTOR CONTROL H : ON L : OFF
68 SOL O DECK SOLENOID CONTROL H : ON L : OFF
69 REC F SW I DECK FEW REC SW INPUT H : OFF L : ON
70 REC R SW I DECK RVS REC SW INPUT H : OFF L : ON
71 PACK SW I DECK PACK SW INPUT H : OFF L : ON
72 Cr02 SW I DECK CrO2 DETECT SW INPUT H : CrO2 L : NORMAL
73 PLAY SW I DECK PLAY SW INPUT H : OFF L : ON
74 B1/2 O DECK ACTIVITY CHOICE MODE (HA12219NT) H : B2 L : B1
75 A120/70 O DECK ACTIVITY CHOICE MODE (HA12219NT) H : 70U L : 120U
76 BIAS O DECK BIAS CONTROL H : ON L : OFF
77 NOR O DECK NORMAL (HA12219NT) H : NORMAL L : CrO2
78 REC/PLAY O DECK REC/PLAY CHANGEOVER H : REC L : PLAY
79 DOLBY/NR O DECK DOLBY CONTROL H : ON L : OFF
80 CLK O CLOCK OUTPUT TO SYSTEM IC/PLL IC
81 MD PROTECT I MD PROTECTION L : PROTECT
82 FAN H/L O FAN SPEED CONTROL H : LOW L : HI
83 FAN ON/OFF O FAN ON/OFF CONTROL H : OFF L : ON
84 A MUTE O AUDIO MUTE CONTROL H : OFF L : ON
85 CD A MUTE O CD ANALOG MUTE CONTROL H : ON L : OFF
86 TUNER MUTE O TUNER MUTE CONTROL H : ON L : OFF
87 POWER O POWER RELAY CONTROL H : ON L : OFF
88 PROTECT I PROTECTION DETECT H : PROTECT
89-91 KEY1-KEY3 I KEY A/D INPUT1-3
92,93 AD PROTECT2,1 I PROTECTION DETECT INPUT2,1 0.5V : PROTECT
94 MECHA MUTE O DECK MECHA MUTE OUTPUT H : ON L : OFF
95 RDS SLEVEL I RDS S-LEVEL INPUT (E,T type)
96 AVSS – GND
97 PHOTO I DECK ROTARY DETECT INPUT
98 VREF – 5V REFERENCE VOLTAGE ( NO BACKUP)
99 AVCC – 5V POWER SUPPLY ( BACKUP)
100 DATA O DATA OUTPUT TO SYSTEM IC/PLL IC
65 66
H H REC
H L REC PAUSE,ARM
L L PLAY
RXD-M51MD(K)COVER1,1P( 98.12.1019:11 y[W 11

RXD-M51/M51MD
7
CIRCUIT DESCRIPTION
Back up power
supply (+5V)
X09, IC205
X33, IC1
MAIN u-COM
M30622MA-174FP
ENG_KANA
MD_MUTE
MUTE AND OR
(MAIN u-COM)
back up sw
MD SUPPLY VOLTAGE
CHANGE-OVER
TERMINAL MD_RESET
MD-ST
SEARCH LOAD_IN
DSCK
K_DATA DSTB MD_DATA
uart
rxd
txd
digital in
analog L/R in
analog L/R out
AD / DA
CONVERTER
MD
CONTROL
u-COM
DRIVE
UNIT
MD u-DOM
RF AMP ENDEC / ATRAC
MD mecha. unit (MDM-98A)
2
22
22
1
3
1
uPD78058GC-B20
• DISPLAY CONTROL
• RF AMP CONTROL
• SIGNAL PROCESSING IC
CONTROL (TUNER)
• VOLUME, MUTE CONTROL
• INPUT SELECTOR CONTROL
back up voltage detection
5. Composition (MD section)
5-1 Microprocessor periphery block diagram
Pin No Name I/O Description
1 PDOWN O MDM-98A POWER DOWN DETECTOR
2 SEARCH O CD SEARCH OUTPUT
3 LOAD IN I LOAD SWITCH INPUT
4 Avss – A/D POWER SUPPLY (CONNECTED TO GND)
5,6 – – NO USED
7 Avref1 – D/A REFERENCE VOLTAGE(+5V)
8 RXD I COMMUNICATION FROM MAIN u-COM (UART RXD)
9 TXD O COMMUNICATION TO MAIN u-COM (UART TXD)
10 – – NO USED
11 MD_DATA I MD IC IN DATA (MDM-98A IN DATA)
12 K_DATA O MD IC OUT DATA (MDM-98A OUT DATA)
13 DSCK O MD IC CK (MDM-98A CLOCK)
14 DSTB I MD IC STB (MDM-98A STB)
15 COMM_ANS I NO USED
16 COMM_DIN I NO USED
17 COMM_DOUT O NO USED
18 COMM_CLK I/O NO USED
19 COMM_REQ O NO USED
20~31 – – NO USED
32 6.5/5.0V O MD LOAD VOLTAGE CHANGE-OVER DISC LOAD/EJECT : H OTHER : L
33 Vss – u-COM(CONNECTED TO GND)
34~43 – – NO USED
44 INISW I INITIAL SW
45~58 – – NO USED
59 SRESET O NO USED
60 RESET I u-COM RESET
61 – I NO USED
62~66 – – NO USED
67 CE I u-COM CE
68 Vdd – u-COM POWER SUPPLY
69 X2 – 5MHz OSCILLATOR
70 X1 I 5MHz OSCILLATOR
71 IC – IC TERMINAL(CONNECTED TO GND)
72 NC – NO USED (OPEN)
73 GND I NO USED (CONNECTED TO GND)
74 Avdd – A/D POWER SUPPLY
75 Avref0 I A/D REFERENCE VOLTAGE
76 BACKUP I BACKUP DETECTOR(A/D)
BACK UP : MORE THAN2.2V NO BACKUP:LESS THAN2.2V
77 AMUTE O ANALOG MUTE H : MUTE ON L : MUTE OFF
78 BACKUPSW O BACKUP DETECTOR SW H:ON(IN CASE of CE : HIGH) L:OFF(IN CASE of CE LOW)
79 MD_RESET O MD u-COM RESET H : NORMAL L : MD u-COM RESET (LOW EDGE)
80 MD_ST O MD ON/CD SYNC H : MD ON L : BACKUP MODE
5-2 Pin description of MD u-COM: uPD78058GC-B20 (X33 :IC1)
6. Test mode
6-1 Test mode of the receiver
(1) Setting of the test mode.
While pressing the [Band] key, plug the AC power cord into an AC power outlet.
(2) Canceling of the test mode.
Unplug an AC power cord.
(3) Condition in test mode.
POWER • • • • • • ON
SELECTOR • • • TUNER [BAND]
FL, LED • • • • • • All the fluorescent display indicate and LEDs light. (The all illuminated state is cleared by pressing any main
unit key or remocon key.
EX. BASS • • • • • OFF
RXD-M51MD(K)COVER1,1P( 98.12.1019:11 y[W 14

RXD-M51/M51MD
8
CIRCUIT DESCRIPTION
(4) Basic operation in test mode.
The muting during mode selection is not controlled in the test mode.
The test mode is cancelled when the AC power is turned OFF.
(5) The operation of the keys in the test mode.
6-2 Test mode of DECK section
(1) Setting
While pressing the TAPE key(DECK), plug the AC power cord into an AC power outlet.
(2) Resetting
Disconnect the AC power cord from an AC power outlet or press the [ON/STANDBY] key.
(3) Operation in TEST mode
(a) Initial condition
Item Condition
Power ON
Selector TAPE
Main VOL. 0dB (VOL. 80)
Input level(AUX) -6dB(INPUT 0)
EX. bass OFF
FL, LED, LCD All the FLs, LEDs, and LCDs are turned on
(b) 4-sec REC
• If the REC key is pushed, the system record for 4sec. Then, it rewinds to the REC starting position and plays back auto-
matically.
• If the REC key is pushed during the 4-sec REC operation, the system records further for 4-sec, then returns to the start-
ing position of the first 4-sec REC operation and plays back.
SERECTOR TUNER AUX
OPERATION KEY
MENU NORMAL ACTIVITY DISPLAY DISPLAY DISPLAY
VOLUME INPUT BALANCE
(VOLUME15) (INPUT 0 ) (CENTER)
4P.CALL : DOWN VOLUME 1 INPUT-6(dB) L ch MAX
7P.CALL : 10 STEP CHANGEOVER VOLUME 40 INPUT 0 (dB)
CENTER
10 20 30 40 01
¢ P.CALL : UP VOLUME 80 INPUT+3(dB) Rd MAX
REPEAT EQU.MAX EQU.MINI EQU.FLAT
SOUND
S-LEVEL DISPLAY
(E.T only)
ATT OFF
ATT ON NORMAL ACTIVITY
TUNER CATT OFF
: S-LEVEL A/D VALUE(HEX)
DOT (DISPLAY) 1st figure 2nd figure 3rd figure 4th figure
MECHA. HALF FWD REC INHIBIT RVS REC INHIBIT CRO2(TYPE¿) CASSETTE HALF
SWITCH DETECTION SW DETECTION SW DETECTION SW DETECTION SW
NG / / / /
OK T A P E
(c) Mechanism half switches indication
The mechanism half switches status are indicated "/ " or "TAPE" on the display as shown below.
6-3-1 Inspection mode
Setting : While pressing the [MD REC] Key, plug the AC power cord into an AC power outlet.
The "INSPECTION" shows on the display.
Cancellation : Unplug the AC power cord from an AC power outlet.
• The "DIGITAL1" is indicated on the display for a
second. "DIGITAL1" CD input
• Source indicator (MD) is blinked.
• The "ANALOG" is indicated on the display for a
second.
• AUX input level MID
• Source indicator (MD) is turned ON .
2 Digital through SOUND
test mode
1 Analog through SOUND
test mode
No. Contents of Keys Operation & Indication RemarKs
TEST mode
SEL.
MD
(PAUSE)
CD
DIGITAL
SP
SEL.
MD
(PAUSE)
AUX IN
(ANALOG)
REC IN
SP
6-3 Test mode of MD player
1. Preparation for adjustment
Test disc
6-3-2 MD TEST mode for adjustment
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. While pressing the [MD PLAY]key, plug the AC power cord into the AC power outlet.
(Start from A if no disc load, C if disc load.)
A MD
STEP Display
Change to step D if press <MD STOP> key. Return to C if press <MD REC>key.
: MD microprocessor version.
* Repair service is available for AUTO pre-adjustment and AUTO adjustment only.
Press MD STOP key to cancel the test mode if in needless test modes.
B EJECT
C AUT YOBI
Entering the specific mode
Whenever the [MD REC] button is pressed, the mode is changed.
AUTO pre-adjustment AUTO adjustment RESULT SUB RESULT
EEPROM setting MANUAL adjustment MANUAL pre-adjustment
(AUT YOBI) (AUTO AJST) (RST YOBI) (RESULT)
(EEPROM SET) (MNU AJST) (MNU YOBI)
D tsm e : Test mode STOP state
• Canceling the test mode
When the POWER button is pressed, the test mode is canceled, and the POWER OFF state is set.
( ): Display
RXD-M51MD(K)COVER1,1P( 98.12.1019:11 y[W 15

RXD-M51/M51MD
9
CIRCUIT DESCRIPTION
2. AUTO adjustment mode
Step No. Setting Method Remarks Display
Step 1 Test mode STOP state [ t s m e ]
Step 2 Press the MD REC button two times. AUTO adjustment menu [ A U T O _ A J S T _ ]
Step 3 Press once the MD PLAY button. The slide moves to the innermost periphery, and automatic [ : _ _ _ _ _ _ ]
adjustment is started.
• In case of high reflection disc changes as follows.
PEG→HAG
•In case of low reflection disc changes as follows.
PEG→LAG→GCG→GEG→LAG
End of adjustment If adjustment is OK, Step 4.
If adjustment is NG, Step 7.
Step 4 Adjustment value output [ _ C O M P L E T E _ ]
Press the MD PLAY button. STEP 5
Press the MD STOP button. STEP 2
1. AUTO pre-adjustment mode (Low reflection disc only)
Step No. Setting Method Remarks Display
Step 1 Test mode STOP state [ t s m e ]
Step 2 Press once the MD REC button. AUTO pre-adjustment menu [ A U T O ]
Step 3 Press once the MD PLAY button. The slide moves to the innermost periphery, and automatic [ : _ _ _ _ _ _ ]
pre-adjustment is started.
• During automatic adjustment changes as follows.
HAo→RFg→SAg→SBg→PTG→PCH→GTG→GCH→RCG→
SEG→RFG→SAG→HAO→HEO→TCO→LAO
End of adjustment If adjustment is OK, Step 4.
If adjustment is NG, Step 5.
Step 4 Grating adjustment, [ _ C O M P L E T E _ ]
adjustment value output
Press once the MD STOP button. STEP 2
Step 5 Adjustment value output [ A U T Y O B I ]
Press once the MD STOP button. STEP 2 AUTO pre-adjustment menu
• : Adjustment name, : Address
• Test Mode
1. AUTO pre-adjustment mode • Automatic pre-adjustment is performed.(After adjustment the grating adjustment mode is set.)
• The adjustment value is output with the aid of system controller interface.
2. AUTO adjustment mode • Automatic adjustment is performed.
• The adjustment value is output with the aid of system controller interface.
• Continuous playback is performed. (Error rate indication, jump test)
3. RESULT sub-mode* • The measurement value, set value and calculated value are indicated.
• The set value is changed manually (in servo OFF state).
4. RESULT mode (final adjustment)* • The set value (after calculation) is indicated.
• The set value is changed manually (in servo OFF state).
5. MANUAL pre-adjustment mode* • RF side manual adjustment is performed.
• Focus and tracking signal ATT manual adjustment is performed.
• Focus and tracking signal offset setting is performed.
6. MANUAL adjustment mode* • Focus
• Don't adjust.
and tracking signal ATT manual adjustment is performed.
7. EEPROM setting mode*
8. TEST-PLAY mode* • Continuous playback from the specified address is performed.
• C1 error rate measurement,
*This mode is not used for service.
9. TEST-REC mode* • Continuous recording from the specified address is performed.
• Change of record laser output (servo gain is also changed according to laser output)
10. EJECT mode* • TEMP setting (of EEPROM setting)
Step 5 Continuous playback (groove section) [ a c]
Step 6 Press the MD STOP button. STEP 2 AUTO adjustment menu
Step 7 Adjustment value output [ C a n ' t _ A D J . ]
Press the MD STOP button. STEP 2 AUTO adjustment menu
• : Adjustment name, : Measurement value, : Address
Step No. Setting Method Remarks Display
Figure 1-1 Optical Pickup Grating Deviation
Measuring Method
Mechanism Adjustment
1. Optical pickup grating inspecting method
After the automatic adjustment is performed in the AUTO
mode (test mode) with the aid of high refection MD disc
("COMPLATE"isdisplayed),theLissajous'swaveform(x-y)is
adjusted.
1.Slightly loosenthe 3 screwsof spindlemoto, andmaken an
adjustment, observing the Lissajous's waveform.
2. After adjustment tighten the screw in arder of 1 , 2 , 3 .
OSILLOSCOPE
GND CH1 CH2
XY
43 pin of IC 1101
GND
26 pin of IC 1101
EOUT
25 pin of IC 1101
FOUT
100K
470p
470p
a
b
LISSAJOUS'S WAVEFORM
Less thana:b = 3:1
100K
Figure 1-2
1
23
1
2
3
adjusting
hole
Spindle motor
Check the Lissajou's waveform,
shifting the mounting position with
a screwdriver (to be fitted into the
disc motor adjusting hole).
Spindle Motor
Adjusting hole
2. Jitter adjustment and checking method
Figure 1-3 Jitter connection diagram
jitter Meter
3pin of IC 1201 (TP1274)
EFMMON
13 pin of IC 1201 (TP1275)
GND
After performing automatic adjustment in AUTO mode of
TEST mode using the low reflection MD disc, check this jitter
in pit continuous playback and groove continuous playback
mode.
RXD-M51MD(K)COVER1,1P( 98.12.1019:12 y[W 18

RXD-M51/M51MD
10
CIRCUIT DESCRIPTION
6-4 Test mode of CD player
6-4-1 Main unit
(1) Setting of the test mode
While pressing the [CD PLAY] key, plug the AC
power cord into an AC outlet.
(2) Canceling of the test mode.
Unplug the AC power cord from AC power outlet or
press the [SET] key.
(3) Operation
6-4-2 Mecha. manual mode
(1) Setting
While pressing the [DISC 1 PLAY] Key, plug the AC
power cord into an AC outlet.
(2) Cancelling
Press the [ON/STAND BY] Key.
(3) Operation
KEYS INDICATION OPERATION
FF CD MANUAL LIFT MOTOR UP
FB CD MANUAL LIFT MOTOR DOWN
DISC 2 CD MANUAL LOAD MOTOR OPEN
DISC 3 CD MANUAL LOAD MOTOR CLOSE
KEY
[DISC3 PLAY]
+AC CD 5 01 POWER ON, SEL CD
Mecha. initialization
Tray 3 opens
STOP CD 5 01 STOP
FF CD 5 01 Pick manual feed (INîOUT)
(Stop mode only)
FB CD 5 01 Pick manual feed (OUTîIN)
(Stop mode only)
SKIP DOWN
SKIP UP
CD 5
CD 5 06
Indication
: Adjustment value/Mean
value (stop mode only)/HEX
Read TOC îplay
DOT TNO SEC.
section section section
TB/FB TB value FB value
TG/FG TG value FG value
FE/RF FE value RF value
TE/VC TE value VC value
PLAY/PAUSE
PAUSE
óï
PLAY
(Cyclically
changed)
CD 5 05
PLAY MARK
ON ‰
CD 5 03
PAUSE MARK
ON 8
TRAY CLOSE/DISC CLAMP
03 MODE
(TRACKING SERVO OFF)
05 MODE
DISPLAY OPERATION
DISPLAY DESCRIPTION
BLANK DISC Non Recorded disc
CAN'T COPY Inhibit to record by SCMS
CAN'T EDIT Inhibit to edit by MD standard
CAN'T REC Inhibit to record by disc damage(10 or more
defects/recordable cluster is 0)
DISC ERROR** OR : UTOC read error or FTNO>LTNO
(edit/record) permit ALL ERASE only
DO : Start address TNO>endless TNO
(playback) handle poor TNO as 1SG
(edit/record) permit ALL ERASE only
C0 : Write poor data in UTOC0
C1 : Write poor data in UTOC1
C2 : Write poor data in UTOC2
C4 : Write poor data in UTOC4
(play back) playback even if address
roof(C0)
(edit/record) permit ALL ERASE only
DISC FULL No recordable area
MECH ERR** 10-13 : head poor down
20-23 : head poor up
no disc No disc in the unit
NO TRACKS Disc recorded title only
NOT AUDIO Disc recorded audio signal.
PLAY ONLY Record to music disc
PROTECTED Record disc inhibited to record
READING In mode of reading TOC or UTOC
SRCH ERR** 30 : Search time over in playback, FF or FB
31 : Search time over in REC-PAUSE
32 : Search time over in record
TEMP OVER High temperature
TITLE FULL Input over letter of title
UNIT ERROR Hardware damage
UTOC W ERR Error of writing to UTOC
WRITING In writing to UTOC
7. MD mechanism error message
RXD-M51MD(K)COVER1,1P( 98.12.1019:12 y[W 19

RXD-M51/M51MD
11
ADJUSTMENT
(b)
(a) Laser Power
Pickup
0.05~0.15 mW
Optical power meter
RF signal in test mode (PLAY).
Perform the tangential and focusing offset are focused
into one point on the display. The crossing points above
and below the center shall also be looked clearly.
No.
1
2
ITEM
LASER
POWER
FOCUS
ERROR
BIAS
INPUT
SETTING
–
Test disc
Type 4
OUTPUT
SETTING
Connect an oscilloscope
as follows.
(+)side : RF(CN1-1)
GND : VC (CN1, 4)
Set the senor section of
the optical power meter
on the pickup lens.
PLAYER
SETTING
Press the "PLAY"
key to check that the
display is "03".
Press the "PLAY"
key. Confirm that
the display is "05".
ALIGNMENT
POINT
VR1
–
ALIGN FOR
On the power
from.0.05 to
0.15mw. when the
diffraction grating is
correctly aligned
with the RF level of
0.8Vp-p or more
Optimum eye pattern
FIG.
(a)
(b)
Note:
Type 4disc :SONY YEDS-18 Test Disc or equivalent.
LPF : Around 47kΩ+ 390pF or so.
Adjustment of CD player
TEST MODE : While pressing the [DISC 3 PLAY] key, plug the AC power cord into the AC outlet.
RF signal : AC coupled
★The MD Adjustment is listed on page 8 through p10.
AG
{
(A)
(B)
Oscilloscope AC voltmeter AC voltmeter
Frequency counter
X09 CN3
TEST PIN
1
2
3
PLAY (L)
GND
PLAY (R)
RVS FWD
NO. ITEM INPUT
SETTING OUTPUT SETTING CASSETTE TAPE DECK SETTING ALIGNMENT POINTS ALIGN FOR FIG.
Unless otherwise specified, set the respective switches as follows: 0dBs = 0.775V
TAPE : NORMAL DOLBY : OFF
I Cassette mechanism unit (Adjustment of the REC / PLAY head)
(1) Demagnetization
and cleaning ——
Power : OFF
Demagnetization,
cleaning, PLAY
Recording
head, erase
head, capstan
pinch roller
Demagnetize the REC / PLAY head
with the head eraser. Clean the REC/
PLAY head, erase head, capstan and
pinch roller using a cotton swab slightly
damped with alcohol.
(2) Azimuth of the REC / PLAY
head
SCC-1727
TCC-153
MTT-114
10kHz, -10dB (B) PLAY
Adjust the output to maximum and
adjust the azimuth adjustment screw
for the Lissajours waveform pattern of
the oscilloscope to become close to a
45˚ straight ling.
II PC board adjustment.
(1) BIAS
CURRENT
(A)
Adjust the AG for the
output of the DECK to
become 12.5KHz –20dBs.
400Hz / 12.5kHz
(AC-224)
(B) REC PLAY VR3(L)
VR4(R)
Record 400Hz and 12.5kHz alternately,
and adjust the bias current adjustment
potentiometer for the playback levels to
become the same.
RXD-M51MD(K)COVER1,1P( 98.12.1019:12 y[W 22

RXD-M51/M51MD
12
WIRING DIAGRAM
CN4
CN1501 CN2 CN205
CN2
WH1
WH202
CN202
WH201
GND
FM 300
AM ANT
FM 75
AM ANT
FM
300 GND
FM
75
Lch 1
Rch 2
AUX IN
J1
J201
J201
A201
CN206 CN1
CN207 CN2
WH203 CN11
CN4 CN1
CN1 CN2
E4
E6
E1
E5
WH4WH3
WH1
R-ch
L-ch
1
2
J1
CN6
CN4
CN7 CN8 SPEAKERS
E3
CN3
CN5 WH1 E1
J1 HEADPHONE
RXD-M51 (X07-299X-XX)
RXD-M51MD (X07-2992-71)
RXD-M51 (X09-612X-XX)
RXD-M51MD (X09-6122-71)
RXD-M51MD (X33-1172-71)
DIGITAL OUT
(OPTICAL)
A301
WH2
FAN
28
28
28
1
1
18
1
1
12
12
1
12
E35-2015- 5
7
17
1
6
16
1
5E35-2200-
6
16
16
1
2
18
1
12 12
11
10 10
11
2
1
1
2
12 12
11
10 10
11
29
1
10
1
1
12
(M)
(T,E)
: AC110-120V/220-240V~
50/60Hz
: AC230V~ 50Hz
WH6 WH5 BRN YEL
15
1
2
2
1
15 1 10
1
9
12
1
12
10
5
F1
2
1
5
5
15
1
DESTINATION ABB.
COUNTRY
EUROPE
U.K. E T
UNIT No.
2-71
GENERAL MARKET ABB.
EUROPE
U.K. E T
COUNTRY
DESTINATION
M
2-72
UNIT No.
0-21
EUROPE
U.K.
DESTINATION
GENERAL MARKET
COUNTRY
E
T
M
2-72
0-21
ABB. UNIT No.
EUROPE
DESTINATION
U.K.
COUNTRY
E
T2-71
ABB. UNIT No.
EUROPE
U.K.
COUNTRY
E
T
ABB.
2-71
DESTINATION UNIT No.
7
1
6
1
2
1
2
1
P1
9
(D40-1602-
MD MECHANISM
5) (X33-117X-XX)
USED RXD-SE5MD/RXD-M51MD
MECHANISM
(D40-1601- 5)
CASSETTE
(D40-1612-
CD MECHANISM
5)
(X09- ) (B/2)
USED (T,E)TYPE
USED (M)TYPE
(A/2)
USED
RXD-M51
(X07-299X-XX) (A/5)
(X07- ) (B/5)
(X07- ) (D/5)
(X07- ) (E/5)
(F09-0140-
FAN
PRIMARY UNIT
SECONDARY UNIT
(X07- ) (C/5)
(X14- ) (B/2)
HEADPHONE
RXD-M51
MD UNIT
(X09-612X-XX)
AUDIO UNIT
RXD-M51(T,E)/RXD-M51MD(T,E)
RXD-M51(M)
TUNER PACK : W02-2666-05
: W02-2667-05
RXD-M51MD
RXD-SE5MD/
USED
(X14-4870-00)
DISPLAY UNIT
(A/2)
5) RXD-M51MD
USED
POWER AMPLIFIER UNIT
RXD-M51MD
MDM-98A
RXD-M51MD(K)COVER1,1P( 98.12.1019:12 y[W 23

ACEBD
2
1
3
5
7
4
6
Refer to the schematic diagram for the value of resistors and capacitors.
PC BOARD PARTS LOCATION
MD MAIN PWD-A (TOP VIEW)
13
RXD-M51MD(K)COVER1,1P( 98.12.1019:12 y[W 28

14
FGIHJ
2
1
3
5
7
4
6
PC BOARD PARTS LOCATION
MD MAIN PWB-A (BOTTOM VIEW)
RXD-M51MD(K)COVER1,1P( 98.12.1019:12 y[W 27

MD MECHANISM SWITCH PWB
CN1401
TO MD MAIN PWB
CN1300
CN1101
TO MD MAIN PWB
CN1604
TO MD MAIN PWB
CN1603
TO MD MAIN PWB
CN1602
TO MD MAIN PWB
TO MD MAIN PWB
MD SPINDLE MOTOR
M1951
1
2
RD
BK 1
2
RD
BK
MD LOADING MOTOR
M1953
MD SLED MOTOR
M1952
1
2
RD
BK
R1901
R1902
R1903
R1904
1
2
BK
BK
CN1901
SW1955
RECORD
SW1954
PLAY
SW1956
LOADING
SW1952
DIRECT
SW1953
LEAD IN
RECORD
HEAD
FLEXIBLE CABLE
MD PICK UP UNIT
15
KMOLN
2
1
3
5
7
4
6
Refer to the schematic diagram for the value of resistors and capacitors.
PC BOARD (Component side view)
RXD-M51MD(K)COVER1,1P( 98.12.1019:12 y[W 32

PQSRT
2
1
3
5
7
4
6
C13
R13
R19
R17
R15
C14
R24
R16
R18
C23
W51
W52
R22
R30
R31
R29
R27
R23
R20
R26
R46
R21
R48
C12
R52
R53
60 61
21 20
1
8041
40
14
58
17
814
IC3
IC2
IC1
ROUT
CD-GND
RS
UART2 UART1
UGND
U+5V
A.MUTE
CE
DGND
D-OUT
+8V
PROT
(5MHz)
LOUT
RIN LIN
AGND
+12V
C26
L1
W6
W5
W19
W1
W2
W20
W3
W13
W7
W8
W11
W9
W10
W15
W12
W16
GND
+5V
BACKUP-SW
BACKUP
LOADIN
CE
DIN
D.GND
W4
R1
R43
R9
R32
R25
W17
C16
R14
R11
R10
R12
R42
R44
R45
R38
R39
R40
R47
R50
R51
R49
R28
R35
W18
R36
R37
R33
R34
C1 C2
R2
R7 R8
R5 R6
C11
C20
C10
C19
C15
C5
C9
C6
C25
C21
C24
C17
C22
C8
C7
L3
L2
X33-1172-71 : T1E1
EB
BE
BE
1
28 1
18
B E
E B
E B
C18
R41 BE
EB
MD u-com
AVCC REG.
ANALOG REC AMP
L-ch R-ch
Q5
Q1
Q2
Q9
Q6
Q3
D1
D5
D4
D2
D3
Q7
Q8
N1
LEVEL SHIFT
X1
CN2
DVDD REG.
CN4
PC BOARD(Component side view)
16 Refer to the schematic diagram for the value of resistors and capacitors.
MD UNIT
RXD-M51MD(K)COVER1,1P( 98.12.1019:12 y[W 31

UWYAAACVXZABAD
2
1
3
5
7
4
6
C55
MUTEDRIVE.
PROTECTION
110
15
110
15
21
15
112
1
12
1
1
9
9
R35
R66
R49
W64
R50
C22 C20
C19
C21
C46
C45
C50
C48
C26
C27
C28
C38
C39 C41
C44
C37
C51
W43
W49
W31
C40
W60
C47
C12
C11
C9
W8
W38
C10
R76
R39 R41
R42
W39
W65
C30
R65
R64
R61 R63
R59
R48
R47
R43
R55
R44
R58
R56
R46
R45
R89
R90
R91
R86
R87
R88
R98
R99
W50
R70
R71
R67
R68
R69
R79
R83
R84
R85
R80
R81
R82
W56
W54
W45
W53
R38
R36
C14
R21
R22
R30
C18
C17
W34
R28
W67
R32
W63
W22
W24
W71
W70
W69
W62
W61
W59
W42
W9
W18
C1
C2
W28
W26
C5 C6
C3 C4
R16
R13
R14
R15
R17
R18
R12
R3
R2
R1
R4
R11
R9
W10
W16
W73
W66
W55
W41
W58
W29
W23
W36
W12
R37
C13
R29
R23
R27 R25
R34
R24
R26
W68
W19
R93
R95
C58
C60
C57
R92
R94
R96
R97
W4
C23 C24
W11
W20
W3
W1
W21
W33
W2
W40
W5
W57
W13
W15
W32
W25
W30
W6
W72
W27
W35
10 1
-30V
D.GND
PROTECT
12 1
A CLASS
-12VAVR
+12V AVR
-30VAVR
L-ch
R-ch
Rch OUT
GND(12V)
+8
GND(8V)
DRIVE
RELAY
F.OFF
+5.6VAVR.
+8VAVR.
2
1
FL FL
Lch OUT
C63
C74
C15
C84
C16
C31
R10
R31
T1
C59
R122
R33
R73
C71
R100
C72
R105
R60
R51
R40
R52
R53
R54
R57
R72
C61
R74
R111
R20
R19
C76
R121
W17
C77
C62
K1
C34
C29
C75
R112
C7 C8
C78
W7
C83
R106
C32
C33
R114
R115
W46
W47 W48
R103
R104
C49
R113
W14
C82
W37
C81
W51
W44
C73
F1 2A 125 V
EB
EB
EB
EB
BE
EB
EB
E B
E
B
E
B
E
B
E B
E
B
E
B
E
B
BE EB
E
B
EB
E
B
E
B
E
B
B
E
B
E
B E
E B
E B
E B
R62
1
2
BE E B BE BE E B BE BE BE
C56
CN10 CN9
Q25
Q27
Q29
Q31
D4
D12
D28
Q20Q19
Q21
Q23
Q22
Q18
Q10
Q17
Q9
Q32
D1
D3
D13
D11
D15
D10
D7
D8
D9
D2
Q6
Q4
Q3
Q7
Q5
D17
D16
D18
D19
D21
D20
D23
D22
(WH2)
Q28
Q13 Q11 Q15 Q14 Q12 Q16
(WH2)
WH5
YEL
WH6
BRN
X07 D/5 X07 E/5
(WH1)
(WH3)
(WH4)
BRN
Q30
YEL
D30
D27
Q39
Q36
Q38
CN5
E6
D6
CN8
CN2
CN3
CN1
E3
Q8
E5
D29
Q35
CN11
D14
WH5
WH6
Q34
J1
CN6
E4
Q37
E1
Q40
E7
D25
D26
Q33
D31
D32
D5
CN7
CN4
X07-2992-71 A/5 : T1E1 2-72 : T2E2 0-21 : M1
X07 B/5
X07 C/5
SPEAKERS
Refer to the schematic diagram for the value of resistors and capacitors.
PC BOARD (Component side view)
MAIN AMP UNIT
17 18
RXD-M51MD(K)SD2,2P( 98.12.1019:05 y[W 2

AE AF AH AJ AL ANAG AI AK AM
2
1
3
5
7
4
6
W603
W602
VR3
R164
R165
R80
R79
R77
R78
R85
R87
R83
R67
C23
R69
R65
R66
C24
R73
R74 R75
R72
R89
R108
R105
C2
R107
R106
C1
R101
R91
R90
R92
R93
R103
R102
R104
R96
R7
R10
R9
R6
R3
R8
R18
R11
R5
C138 C137
C162
C108
R2
R1
R4
C107
C106
C105
R36
R35
R38
R31
R34
R33
R37
R40
R39
R32
R26
R21
R24
R17
R19
R20
R23
R27
R30
R29
R22
R25
R28
R13
R14
R166
R12
W502
R168 R167
C111
C113
C117
C115
C112
C114
C116
C118
C132
C131
C129
C130
W622
C216
R294
C251
W505
R299
R295
R246
R250
W613
R208
R228
R249
R319
R317
R276
R277
R278
R279
R275
R307
R316
R318
R324
R258
C207
W506
C225
R243
W612
W611
W610
W607
W604
R303
W605
C246
W606
R306
C244
C243
C245
R308
W608
C231
W609
R287
R332
R331
R322
R271
R321
R297
R298
R242
R300
R266
R265
R263
R262
R261
R264
R269
R270
R268
R267
R260
R256
R259
C279
C282
C208
R237 R235
C226
C228
R204
R203
R202
R206 R205
R201
C203
C204
R244
W614
R255
R309
R253
R282
C265
C234
R252
C235
R312
R313
R315
R257
R330
R251
C229
C221
R230
C218
R227
R226
C209
C219
R225
R224
R229
C217
R222
R241
R220 C230
C213 R221
C214
C256
C284
R231
C222
C281
W501
R234
R209
R210
R211
R213
R212
R219
R248
R247
R236 R238 R233
C227
R239
W619
C280
R240
R245
C263
C210
C232
C237
C250
R326
C249
R327
R274
W618
R291
R288
R310
R292
D211
R289 C241
C259
C303
C285
C254
R314
R353
C286
R355
R336
C266
R357
R354
R356
C304
R335
C268
C267
C253
R334
R333
R351
W623
R352
C278
C289
C287
18
916
40 41
180
61
6021
20
EB
EB
BE
64
1
33
32
48 49
1617
VR4
R84
R41
R43
EB
BE
EB
EB
R44
R42
C75
R95
W616
C298
C292
C291
C293
R294
C299
W624
C297
W615
W617
R110
R109
C274
W601
C271
C272
C273
C276
C275C277
R281 R280
C296
C269
C270
110
20 11
C295
50 51
31
30
81
80
1001
C38
C37
W621
W620
IC4
D217
Q14
Q15
Q13
Q206
Q18
Q17
D215
IC205
D216
IC203
IC201
IC206
D205
Q16
+5V
VFL
FL-AC FL-AC
POWER
PROTECT
A/D2
A/D1
F.OFF
+5.6V
GND
DE-EMPH
/MONO
DO CE
CLK
DATA
+12V
ST
SD
S-LEVEL
FM-DET/AM-IF
AM IN
GND
12V-NF
RET-GND(12) REF-GND(12)
RET-GND(8) REF-GND(8)
8V-IN
8V-NF
L-OUT
GND
R-OUT
12V-IN
MUTE
Rch
Lch
GND
FM-IN(75)
FM-IN(300)
GND DOUT
(16.9344MHz)
(32.768kHz)
TUN-R
AUX-R
AUX-L
CD-R
REC-R
(10MHz)
VREF-L
EQ-12V
EQ-GND
BIAS12V
GND
PLAY-L
PLAY-R
DOL-GND
TAPE-L
TAPE-R
REC-R
PLAY-R
RDS
(4.332MHz)
PLAY-L
GND
PLAY-R
T-ME-12V
T-ME-GND
REC-L
RECIN-R
RECIN-L
T-ME-12V
T-ME-G
PHOTO
AUX-L
PLAY-L
DOL-12V
GND
DOORSW
REC-L
DOORSW
GND
BIAS-12V
BIAS-G
SPD+
SPD
SLD+
SLD
SLT.SW
GND
R320
C290
W194
CE
DATA
CLK
R/P
R/P
DOLBY
CA-MUTE
PHOTO
5V
(OTHERS)
(OTHERS)
W149
W28
W42
W6
W112
W127
W148
W135
W146
W190
W154
W86
W88
W84
W97
W173
W82
R283
W164
W151
W109
W152
W21
W141
W166
W113
W156
W5
W175
W110
W44
W32
112
E
E
B
B
W107
W50
W52
W9
W8
W7
W1
W24
W91
W78
W74
W76
W71
W53
W45
W150
W159
W136
W27
W11
W26
W19
W184
W72
W14
W60
W81
W187
W13
W153
W139
D208
W160
W163
W165
W144
W123
W126
W137
W143
W116
W117
W63
W145
W174
W182
L205
W122
W162
W128
W188
W189
W87
W186
W178
W75
W101
W94
W85
W100
W61
W65
R160
W92
W58
W57
W51
W67
W89
W4
W181
W20
W73
W15
W95
W102
W99
L5
W167
W130
R70
R68
R60
R86
R76
R82
L4
L3
R94
C28
C27
C103
C104
C110
C135
C102
C136
C9
C7
C10
W17
C109
C123
C122
C121
C124
C127
C126
C125
C128
C120
C119
C161
C101
C26
C13
C18
C25
C32C29 C30
C17
C16
C15
C20
916
81
12 22
11 1
18
C22
C19
C31
C69
C68
C133
C72
C71
C65
C14
C134
C160
C163
C73
C70
C67
C33C34
C12
C11
W34
W140
C61
C4
C3
C64
R64 R63
C5
C63 C62
R61
R62
W68
W118
WH2
C66
W170
C74
W31
W104
W157
W55
W176
W37
W125
WH2
W59
W62
P1
L1
L2
W43
W133
W70
W134
C60
W142
W131
C8
C6
C36
W48
W46
W108
W147
W155
W172
W33
W64
W119
W103
W132
W114
W38
W16
W41
W39
W25
W115
W90
W120
W36
W23
W77
W40
W2
W83
C164
W158
W3
W80
C35
W30
W29
W35
W177
W161
W105
W98
W10
W12
W138
W54
W66
W96
W183
W56
W121
W185
C21
W124
W106
W18
W49
W79
W192
W169
W168
W193
L6
W22
W180
1
116 2
W47
L203
L204
W171
RF-AMP
u-COM
SELECTOR&E-VOL.
B TL-DRIVER
DOLBY-NR BIAS-OSC
PB /REC-EQ
DIGITAL
SERVO
(J&M TYPE)
(E TYPE)
R323
R337
R216
R290
C240
116
1
12
6
3217
118
B
E
CN206
C248
C247
C238
C236
110
E
B
C220
C212
C215
C223
C239
C211
C233
R284
X201
L201
R217
R218
C262 C261
C201
R161
C202
R163
C242
R215
R223
R232
R214
R329
R162
VR201
A201
X2
CN207
X202
X203
R293
R302
R305
R304
R296
R272
R311
R207
R254
L202
R285
R286
D214
C255
R328
W129
R325
VR2
VR1
C206
C205
W69
R358
R301
C252
C288
C224
W179
E
EB
EB
B
A301 TUNER PACK
PB-R
KEY1
KEY2
KEY3
REM
+5V
VREF
GND
VFL
FL-AC
FL-AC
LED0
FC-CE
1
12
2
11
1
10
2
9
LED5
LED4
LED3
LED2
LED1
FL-CLK
ENC2
ENC1
FL-RST
FL-DATA
(2-71)
(2-71)
WH2
114 13
17
RST
D-OUT
BE BE
BE
BE
E
B
B
E
B
E
B
E
B
E
B
E
EB
E
B
BB
E
E
1
11
12
2
19
17
13
OIG
Q205
R
L
D2
D218
IC3
Q8
Q6
Q7
Q2
Q5
Q4
Q1
Q9
Q3
D3
D4
D6
D5
D1
J1
IC1
IC2
IC5
CN4
CN3
AUX-IN
ANTENNA
DIGITAL
OUT
OPTICAL
Q204
Q202
Q207
D206
D207
CN1
Q203
D210
D203
CN202
D213
D201
D202
IC204
IC202
D212
Q208
D209
CN205
WH1
CN2
Q209
Q210
WH201
WH201
S201
WH203
X09-6122-71 A/2: T1E1 2-72 : T2E2 0-21 : M1
Q201
CN201
Q12
Q10
Q11
X09 B/2
Refer to the schematic diagram for the value of resistors and capacitors.
PC BOARD (Component side view)
AUDIO UNIT
19 20
RXD-M51MD(K)SD2,2P( 98.12.1019:05 y[W 3

AO AQ AS AU AWAP AR AT AV AX
2
1
3
5
7
4
6
/TIMER
STANDBY
W9
W14
W10
W11
W1
W6
W2
W12
W7
W19
W4
W3
W13
W15
W18
W8
W5
W16
W17
FWD
GRNRED
P1
REV
C5
C4
R14
R19
R15
R18
R13 R12
R23
R4
R5
R3
R1
R2
R9
R8
R6
R7
R37
R42
R40
R38
R39
R25
R22
R20
R21
R26
R30
R29
R27
R28
C6
C7
CP1
C10
C1
A1
W20
R10
R11
R45
R46
R47
R41
R43 R44
R48
R50
R85
R86
R49
R53 R54
R55
R56
R57
R58 R59
R64
R65
R66
R67
R68
R87
C9
C11
C8
C2
R78R77
R74 R73
R33
R31
R34
R32
R75
R76
R24
C3
R17
R60
R61
R62
R70
R71
R72
R79
R80
R63
R69
R81
R83 R84
R82
R16
R51
R52
R36
B
EE
BB
E
E
B
E
B
E
B
E
B
E
B
E
B
EB
EB
BE
E
B
BE
3332
164
49
4817
16
51
1
2
9
10
1
2
11
12
1 70
EJECT
(T.E.)
(Dolby)
MD
(TUNER/BAND)
MD
(TUNER)
ED1
TUNER/BAND
IC1
WH1
/MULTI
VOL
SET
/DEMO
MODE
REPEAT
SOUND
TAPEREC
TAPE
FFREW
AUXSKIP UPSTOP
MD REC
(AUX)
CD
CD
POWER
DOWN
SKIP
Q4
Q5
Q6
Q1
Q2
Q3
Q10
Q11
Q12
Q8
Q9
D5
CN1
S17S11
S8
S2
S9 S16
S10
S7
S3
S4
S13
S12
S14S15
S5
S6
D6
D2D1
D3 D4
CN2
Q15
Q14 Q13
S1
J1
E1
PHONES
X14 B/2
X14-4870-00 A/2
Refer to the schematic diagram for the value of resistors and capacitors.
PC BOARD (Component side view)
DISPLAY UNIT
21 22
RXD-M51MD(K)SD2,2P( 98.12.1019:06 y[W 6

ABDFHJCEGI
2
1
3
5
7
4
6
0.7V
0.8V
0.8V
0.8V
1.6V
1.6V
0.7V
1.6V
1.6V
1.6V
1.6V
1.6V
1.4V
3.2V
0V
0V
1.9V
1.9V
1.3V
1.3V
1.6V
1.6V
1.6V
1.6V
1.6V
1.6V
1.6V
1.6V
1.6V
1.6V
1.6V
0.8V
3.2V
1.3V
1.6V
1.9V
1.6V
1.3V
1.9V
1.6V
1.4V
1.6V
1.9V
1.7V
1.6V
1.7V
1.6V
2.0V
1.3V
0.8V
0.8V
2.2V
1.6V
2.0V
3.0V
1.2V
1.2V
1.2V
1.2V
2.5V
2.3V
1.7V
1.3V
2.5V
0.8V
1.3V
3.2V
0V
1.6V
1.6V
1.6V
1.6V
1.6V
1.4V
1.0V
0.9V
0V
3.2V
3.2V
3.2V
3.2V
VDD1
TEST2
16 62
100
SYRS
RAA3
26
15 TEST1 DGND 63
14 TEST0 XI 64
13 DGND
XO 65
12 VDD1
DIN 66
11 WBI
DOUT 67
10 VBAT
VDD3 68
9FIN
DGND 69
8BIN
LRCK 70
7TCG
BCLK 71
6EIN
FEMON
72
5AIN
DFCK
73
4AGND
ADDATA
74
3EFMI
DADATA
75
2AVCC
1FEMMON
27 RAA2 SYRDX 99 28 RAA1 SYWRX 98
29 RAA0 SYD7 97
30 RAA10 SYD6 96
31 VDD2 SYD5 95
32 RAA4 SYD4 94 33 RAA5 SYD3 93
34 RAA6 SYD2 92
35 RAA7 SYD1 91 36 RAA8 SYD0 90 37 RAOEX RSTX 89 38 DGND
DGND 88
39 RACASX
VDD1 87
40 RAD2
FOK
86
41 RAD3
DINTX 85
42
RARASX MCCK 84
43
RAWEX
COUT 8344
RAD1
SENSE 82
45
RAD0
SFSY 81
46 SBSY 80 47 TCRS SBO 79 48 ACRCER SBCK 78
49 PLCK TEMON 77
X176KO
23
24
SLDRR
SPDRF
22
TRDRR
SLDRF
FODRR
21
20 TRDRF
19
18 FODRF
17
SPDRR
25
50 EFMO
EXPORTI
X700KO
EXPORTO 51
52
VXI
56
TESO1
TEST3
TEST4
53
54
55
CDDATA
CDLRCK
CDBCLK
57
58
59
VPO 60
61
76
TOTMON
10
C1201
11
5
6
C1200
1
44
45 46 47 48
51
50
49
53 52
54
15 18
40
29
19
R1209
100
1
C1205
220
R1212
R1215
1M
C1209
12P
C1208
12P
20 GND I/01
14
17
WEI/03
I/04
19 I/02
CAS
18
RAS
A0A8
OE
16 A9
A7
15
A1
A6
13 A2
A4 A5
12
VCC
A3
11
1 7 4 2 3 5 6 8 9 10
R1220
150
R1217
XL1201
33.8688MHz
26
24
23
22
21
20
19
18
17
16
14
7
8
9
10
11
12
13
15
3
1
2
4
6
5
25
9
1
3
2
5
4
7
6
8
23
16
10
12
11
14
13
15
17
19
18
21
20
22
25
24
26
F.COIL
T.COIL
SLD-
SLD+
15
18
16
17
R1904
R1903
820
820
SW1956
LOADING
SW1955
REC
SW1954
PLAY
SW1953
LEAD IN
MINF
LOADING
5
4
R1901
470
LEAD IN
HINF
GND
3
2
1
R1902
1.8K
SW1952-B
DISC ID
PRO
SW1951-A
WRITE
18
T-
F+
T+
F-
RF2
MP/R
AGND
VCC
RF4
RF3
RF1
E
COM
F
A
LDVAR
LVVOUT
DGND
DGND
APCOUT
LDVCC
B
LDON
11
10
13
12
2
141
L1200
4.7uH
VCC
6 7GND
4
3 5
1
2
9 8
11 12 10 14 13
680
R1304
0 0
R1300 R1302
C1301
0.027
2
R1301
10
1
120P
C1300
2
1
1
2
SP-
2
SP+
1
TRY+
1
2TRY- 9
2
1
2
1
LVVIN
DGND
APCIN
I/V
I/V
I/V
I/V
SW
27
28 +2.8V 28
27
4
3
2
VCC
GND
1
5
6
7
8
3
4
FOUT
11
10
9
8
7
6
5
4
3
2
1
24
23 22
19
21
20 17 18 16 15
14
13
25
26
27
28
29
30
31
32
33
34
35
36
37 39 38 42 41 40 44 43 46 45 48 47
DIFF
R and SW
DIFF
RF2
RF1
RF4
RF3
REFI
REFO
RFADD
TCGI
AIN
BIN
EIN
FIN
BIAS DISC STBY AVCC DGND AGND SGAIN DATA CLOCK LATCH DTEMP DVCC
EOUT
BOUT
AOUT
TCCO
WBO
22KI
22KO
ADLPFO
NC
ADIPO
ADIPI
LOGIC
EFM
AGC
ADIP
AGC
LPF HPF
POUT
GOUT
ATTR
EFMAGI
EFMAGC
AGND
AVCC
EFMI
EFMO
RF2-1
ADAGI
ADAGC
C1108
0.47
C1110 4700P
C1111
0.47
92 32 33
31
R1103
390K
C1103
0.027
C1102
1
R1100
27
12
11
10
9
11
12 12
9
10
R1102
10K 3
72
1
R1101
R1106
56K
560
R1107
22K
R1108
R1109
22K
R1110
22K
R1111
22K
R1112
22K 9
C1117
270P
C1116
270P
6
C1115
270P
8
C1114
270P
5
C1113
270P
7
11
8
7
9
R1200
100K
R1201
19 100K
R1202
20 150K
R1203
21 150K
R1204
22 62K
R1205
23 62K
R1206
24 33K
R1207
25 33K
C1204
0.047
R1208
220 80
R1211
220 72
70
1200P
C1206
0
C1207
1
0
R1216
41
40
39
37
37
41
40
39
26 27 28
29
26 27 28
29
32 33
34
35 36
32 33
34
35 36
C1203
1
R1210
220
71
10K
R1214
R1222 10K
R1221 10K
R1219 10K
RAA9
L1201
0.47uH
L1101
10uH
C1118
1
L1100
0.47uH
39
+3.2V
+4.8V
+3.2V +3.2V
+3.2V
+3.2V
+3.2V
+3.2V
+3.2V
+4.8V
+4.8V
+3.2V
+4.8V
+4.8V
+3.2V+3.2V
+3.2V
+3.2V
+3.2V
+3.2V+3.2V
+3.2V+3.2V
+3.2V
+3.2V
+3.2V
+3.2V
+4.8V
+3.2V
+3.2V
+3.2V
+3.2V
+B
+3.2V
+B
+B +B
+B
+B
+B
+B
LEAD IN
HINF
GND
LOADING
MINF
3
4
+B
4.7
C1303
10
C1302
4.7
C1100
0
R1303
C1600
1
330P
C1112
C1105 3300P
0.033
C1104
2
1
C1202
M1953
M1952
M1951
+3.2V
+4.8V
+4.8V
0
R1561
10
C1304
C1109 1u6.3
+
C1120 0.01
1u6.3
C1101
+
1u6.3
C1106
+0
R1113
1u6.3
C1119
+
100
R1223
0
R1224
22P
C1210
ENCODER/DECODER
EFM/ACIRC/ATRAC
DSP
SERVO
IN
DIGITAL
DIGITAL
IN
DIGITAL
REC
D-RAM
4M BIT
CW1901
IC1101
IC1201
IC1300
IC1401
IC1601
IC1801
IC1702
IC1402
IC1202
:
:
:
:
:
:
:
:
:
IR3R55
LR376484
IX2474AF
74ACT02F
IX0253AW
S29294A
BA5984FP
XC62EP32
NJM431U
Q1803,1806
Q1300,1302
Q1301,1303
Q1700
Q1804,1805 :
:
:
:
: RN1406
2SK2909
2SK1473
2SA1314C
2SC2412KR
RNC1407
D1300,1301
CN1602
CN1901
MOTOR
FEED
MOTOR
DISC
MOTOR
LOADING
FM
DM
LM
Q1400,1401,1701 RNC1404
:
: SB0209CP
D1300
D1301
Q1303
Q1301
CN1300
Q1302
Q1300
CW1903
DRIVER
IC1701 UDA1344
:
REC HEAD
Q1500,1800,1802 :
Q1402,1403 RN2404:
CN1101
CN1603
CN1604
HEAD
RF AMP
OUT
DIGITAL
Q1702,1801 : 2SA1162G
BIAS
EFM OUT
DIGITAL LINE
GND LINE
SIGNAL LINE
B LINE
: SB00703QD1401
IC1201
IC1202
PICKUP
(MOTOR PWB)
MECHA. (SW PWB)
IC1300
IC1101
MECHA.
(D40-1602-
NOT USED RXD-M51(M,T,E)
MD MECHANISM
5) MDM-98A
CAUTION: For continued safety, replace safety critical components only with manufacturer's recommended parts (refer to
parts list). indicates safety critical components. For continued protection against risk of fire, replace only with same type
and rating fuse(s). To reduce the risk of electric shock, leakage-current or resistance measurements shall be carried out
(exposed parts are acceptably insulated from the supply circuit) before the appliance is returned to the customer.
The DC voltage is an actual reading measured with a high impedance type voltmeter. The measurement value may vary depending on the measur-
ing instruments used or on the product. Refer to the voltage during RECORDABLE MD PLAY unless otherwise specified; The value shown in ( ) is
the voltage measured at the moment of STOP. The voltage followed by (REC) refers to the value during MD RECORDING.
RXD-M51MD(K)SD2,2P( 98.12.1019:06 y[W 7