Pioneer MJL-77 Service manual
^
MINIDISC
)
ORDER NO.
RRV2201
MINIDISC RECORDER
MJ-L77
THIS MANUAL IS APPLICABLE TO THE FOLLOWING MODEL(S) AND TYPE(S).
Type
MYXK AC220-230V
NVXK AC230V
÷ These products are component of systems. This product does not operate normally by
itself.
Please connect it to the STEREO CD RECEIVER XC-L77 and the DISPLAY UNIT DU-L77, an
accessory of the XC-L77, for adjustment and operation inspection.
Model
MJ-L77
Power Requirement Remarks
Component Model Service manual Remarks
STEREO CD RECEIVER XC-L77 RRV2187
S-L9-LRW –– –– RRV2176
SPEAKER SYSTEM –– S-L9-A-LRW –– RRV2176
–– –– S-L8-LRW RRV2178
STEREO CASSETTE DECK CT-L77 RRV2199
MINIDISC RECORDER MJ-L77 RRV2201 This manual.
CONTENTS
1. SAFETY INFORMATION
2. EXPLODED VIEWS AND PARTS LIST
3. BLOCK DIAGRAM AND SCHEMATIC DIAGRAM
4. PCB CONNECTION DIAGRAM
5. PCB PARTS LIST
6. ADJUSTMENT
PIONEER CORPORATION 4-1, Meguro 1-chome, Meguro-ku, Tokyo 153-8654, Japan
PIONEER ELECTRONICS SERVICE, INC. P.O. Box 1760, Long Beach, CA 90801-1760, U.S.A.
PIONEER ELECTRONIC (EUROPE) N.V. Haven 1087, Keetberglaan 1, 9120 Melsele, Belgium
PIONEER ELECTRONICS ASIACENTRE PTE. LTD. 253 Alexandra Road, #04-01, Singapore 159936
c
PIONEER CORPORATION 1999
...............................................
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22
29
32
2
3
8
7. GENERAL INFORMATION
7.1 DIAGNOSIS
7.1.1 TROUBLESHOOTING
7.1.2 DISASSEMBLY
7.2 IC
8. PANEL FACILITIES AND SPECIFICATIONS
..................................................................
..................................................
T – ZZE AUG. 1999 Printed in Japan
................................
...........................
......................................
.......
43
43
43
46
49
59
MJ-L77
1. SAFETY INFORMATION
This service manual is intended for qualified service technicians; it is not meant for the casual
do-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have been
trained to properly and safely repair complex products such as those covered by this manual.
Improperly performed repairs can adversely affect the safety and reliability of the product and may
void the warranty. If y ou are not qualified to perform the repair of this product properly and safely, you
should not risk trying to do so and refer the repair to a qualified service technician.
WARNING
This product contains lead in solder and certain electrical parts contain chemicals which are known to the state of California to
cause cancer, birth defects or other reproductive harm.
Health & Safety Code Section 25249.6 – Proposition 65
LABEL CHECK
IMPORTANT
THIS PIONEER APPARATUS CONTAINS
LASER OF CLASS 1.
SERVICING OPERATION OF THE APPARATUS
SHOULD BE DONE BY A SPECIALLY
INSTRUTED PERSON.
MYXK type
NVXK type
LASER DIODE CHARACTERISTICS
MAXIMUM OUTPUT POWER: 32 mW
WAVELENGTH: 785 nm
Additional Laser Caution
Control method of the current through a laser diode.
The resistor R105 on the CORE MAIN UNIT ASSY (For MD
mechanism assy) are for the limiting of current through a laser
diode.
Control method of the laser output power
The laser pickup assy provide the photo-diodes and APC (Auto
Power Control) circuit.
The photo-diode detect output of the laser diode then IC104 control
the APC circuit according to the signal voltage of the photo-diode via
IC101.
The Variable resistancer on the FPC in the Laser pickup assy can
be adjusted the output level of Laser diode to fix the rated output
level.
Laser Interlock Switch
The loading position detect switch S101 is set to “ LOAD ON ” (ON:
low level, OFF: high level) position, IC104 get the “ LOAD ” signal,
and hand the laser “ LDON ” signal to No. 9 terminal (LDON) of the
Laser pickup assy.
(Printed on the Rear Panel)
Then a laser diode can be lighted exept when the level of signal
“LOAD ” is low.
∗ Refer to page 33.
2
2. EXPLODED VIEWS AND PARTS LIST
NOTES : Parts marked by “ NSP ” are generally unavailable because they are not in our Master Spare Parts List.
The mark found on some component parts indicates the importance of the safety factor of the part.
Therefore, when replacing, be sure to use parts of identical designation.
Screw adjacent to mark on the product are used for disassembly.
2.1 PACKING
NVXK type only
8(1/2)
MYXK type
only
6
MYXK type
only
MYXK type
only
NVXK type
only
2
1
13
3
4
5
10
MJ-L77
12
1
11
8(2/2)
(1) PACKING PARTS LIST
Mark No. Description Part No.
NSP 2 Warranty Card ARY7022
1 Power Cord
3 Operating Instructions
4 Operating Instructions
5 Operating Instructions
6 Optical Digital Cord (L= 0.5m) RKX1031
7 Pad Front AHA7260
8 Pad Rear AHA7261
9 Packing Case
10 Sheet (750 × 600 × 0.5) Z23–007
11 Sub Packing
12 Fuse (5A)
13 Polyethylene Bag Z21–038
(0.03 × 230 × 340)
See Contrast table (2)
See Contrast table (2)
See Contrast table (2)
See Contrast table (2)
See Contrast table (2)
See Contrast table (2)
See Contrast table (2)
7(1/2)
7(2/2)
(2) CONTRAST TABLE
MJ-L77/MYXK and NVXK are constructed the same except for the following:
Mark
No.
1 Power Cord ADG7010 ADG7009
3 Operating Instructions ARC7251 Not used
4 Operating Instructions ARE7222 Not used
5 Operating Instructions (English) Not used ARB7196
9 Packing Case AHD7769 AHD7801
Symbol and Description
MYXK type NVXK type
(Swedish/Dutch/Portuguese/Spanish)
(French/English/Italian/German)
Part No.
9
Remarks
11 Sub Packing Not used AHD7770
12 Fuse (5A) Not used AEK7001
3
MJ-L77
2.2 EXTERIOR
27
23
22
32-1
26
34
25
30
24
35
20
21
25
31
32-2
3
39
4
2
29
D
21
16
38
38
38
8
C
38
11
39
Refer to “2.3 MD
MECHANISM ASSY”.
37
11
18
11
7
12
34
36
A
37
11
6
B
34
35
B
9
A
10
D
C
1
35
14
5
34
15
38
17
13
13
28
4
(1) EXTERIOR PARTS LIST
MJ-L77
Mark No. Description Part No.
1 AF UNIT ASSY AWU7397
2 KEYR UNIT ASSY AWU7398
3 KEYL UNIT ASSY AWU7399
4 BLUE IND. UNIT ASSY AWU7400
5 MAIN UNIT ASSY AWU7395
6 TRANS. UNIT ASSY AWU7396
7 30P FFC/30V ADD7097
8 Cord with Plug ADE7043
9 Power Transformer ATT7054
10 Fuse (T200mA) AEK1047
11 Float Rubber REB1328
NSP 12 MD Mechanism Assy RXA1777
13 Leg AEB7090
14 Rear Panel
NSP 15 Bottom Plate ANF7016
NSP 16 Top Plate ANF7017
17 MD Base ANG7191
18 MD Shield ANG7192
19 • • • • • • • •
20 MD Flap AAN7190
21 Main Line AAP7058
22 Sub Line AAP7060
23 Sub Panel AAP7061
24 Flap Plate AAP7062
25 Front Line AAP7066
See Contrast table (2)
Mark No. Description Part No.
26 CL Lens AAX7704
27 MD Spring ABH7154
28 Bottom Base AMA7014
29 Bonnet AMA7015
30 Button Assy A AWL7044
31 Button Assy B AWL7045
32 Top Panel Assy AWL7052
NSP 32-1 Top Panel 1 AMB7645
NSP 32-2 Top Panel 2 AMB7646
33 • • • • • • • •
34 Screw BBT30P060FZK
35 Screw BBZ30P060FMC
36 Screw BBZ40P060FMC
37 Float Screw RBA1133
38 Screw VPZ30P080FZK
39 MD Spacer AEB7181
NSP 40 Caution Label
See Contrast table (2)
(2) CONTRAST TABLE
MJ-L77/MYXK and NVXK are constructed the same except for the following:
Mark
No.
14 Rear Panel ANC7828 ANC7830
NSP 40 Caution Label ARW1047 ARW1050
Symbol and Description
MYXK type NVXK type
Part No.
Remarks
5
MJ-L77
2.3 MD MECHANISM ASSY
19
21
20
18
37
6
51
52
8
37
34
E
4
9
17
A
54
53
24
14
37
13
12
40
15
40
26
E
F
5
G
41
16
35
F
11
B
27
10
36
C
28
44
33
31
23
40
H
25
39
29
3946
32
42
30
H
38
43
B
40
CN102
A
2
48
49
50 47
45
CN105
G
1
C
CN101
D
3
54
6
CN103
D
MD MECHANISM ASSY PARTS LIST
Mark No. Description Part No.
MJ-L77
Mark No. Description Part No.
NSP 2 CORE SW UNIT ASSY RWZ4335
1 CORE MAIN UNIT ASSY RWZ4334
3 Lead Card 7P RDD1403
4 Lead Wire RKP1814
5 Lever Spring RBH1463
6 Clamp Spring 1 RBK1074
7 • • • • • • • •
8 Loading Belt REB1329
9 Lock Plate RNE1949
10 Loading Base RNK2323
11 Under Slider RNK2314
12 Gear Pulley RNK2316
13 Drive Gear RNK2317
14 Clutch Gear RNK2318
15 Flip Disk RNK2319
16 SW Lever RNK2320
17 Shutter Assy RXA1774
NSP 18 Upper Slider Assy RXA1782
19 Eject Spring RBH1461
20 Upper Slider RNK2324
21 Carrier RNK2315
22 • • • • • • • •
23 Spindle Spring RBH1460
24 Lifter Spring RBH1462
25 Screw Guide RBK1072
41 Screw JGZ17P040FMC
42 Screw PMB20P040FMC
43 Servo Base Assy REA1283
NSP 44 Clamp Magnet RMF1002
NSP 45 Servo Base RNE1946
NSP 46 Disc Table RNK2305
NSP 47 Spindle Motor RXM1091
48 Carriage Motor Assy REA1284
49 Worm RNK2308
NSP 50 Carriage Motor RXM1090
51 Loading Motor Assy REA1290
52 DC Motor /0.75W PXM1010
53 CA Pulley RNK2322
54 Screw BPZ20P080FMC
26 S. H. Spring RBK1073
27 Guide Shaft RLA1312
28 Lead Screw RLA1311
29 Shield Case RNE1950
30 Reference Plate RNK2306
31 S. Holder RNK2307
32 Worm Wheel RNK2309
33 Hook RNK2310
34 Head Lifter RNK2311
35 MD Head RPB1063
36 MD Pick-up RWY1019
37 Screw Z39-019
38 Screw JFZ17P020FZK
39 Screw JGZ14P020FMC
40 Screw JGZ17P028FMC
7
1
23
MJ-L77
3. BLOCK DIAGRAM
AND SCHEMATIC DIAGRAM
3.1 BLOCK DIAGRAM (1/2)
A
4
To STEREO CD RECEIVER XC-L77
(Refer to RRV2187)
CN4702
OUTPUT SELECTOR
(IC4240)
BU40668BCF
4 1
ALC
REC Mute
(Q4231)
P. B. BUF
(IC4250)
NJM4558MD
P. B. Mute
(Q4261)
2SD2114K(VW)
7 57 5
REC BUF
(IC4201)
NJM4558MD
MD
PB
B
REC
MD
MD
PB
C
REC
MD
3 2
REC AMP
(IC4202)
NJM4558MD
D
PB
MD
(Q4203)
2PD601A(QR)
2SD2114K(VW)
AF UNIT ASSY
(AWU7397)
DECK
PB
MD
13
REC
MD
PB
MD
CN4201CN4202
PB
PB
DECK
PB
MD
REC
MD
CN4103CN4104
26
AD / DA
(IC4301)
AK4520A
5
PB
MD
REC
MD
13
14
MD
PB
D
POWER CORD
8
REC
MD
REC
MD
CN4011
J4001
CN4001
TRANS. UNIT ASSY
E
(AWU7396)
1234
5
678
MJ-L77
Note : When ordering service parts, be sure to refer to "EXPLODED VIEWS and PARTS LIST" or "PCB PARTS LIST".
SIGNAL ROUTE
MD
: MD AUDIO SIGNAL
DECK
From STEREO CASSETTE DECK CT-L77
(Refer to RRV2199)
OPT. IN
CN4701
: DECK AUDIO SIGNAL
: DIGITAL PB SIGNAL
: DIGITAL REC SIGNAL
: DIGITAL I/F
A
REC
CN4101
MD
DECK
PB
1
CN104
MD MECHANISM
INTER FASE
(IC4171)
TC74HCT08AF
3
ASSY
(RXA1777)
CORE MAIN
A
UNIT ASSY
(RWZ4334)
B
CORE SW
B
UNIT ASSY
(RWZ4335)
( )
C
J4101
CN4901
C
1/2,
KEYR UNIT ASSY
F
(AWU7398)
5
C
2/2
MAIN UNIT ASSY
(AWU7395)
J4903 J4903
J4902 J4902
6
KEYL
G
UNIT ASSY
(AWU7399)
BLUE IND.
H
UNIT ASSY
(AWU7400)
7
C
D
9
8
1
MJ-L77
3.2 BLOCK DIAGRAM (2/2)
23
4
A
SIGNAL ROUTE
: DIGITAL PB SIGNAL
: DIGITAL REC SIGNAL
: DIGITAL I/F
: RF SIGNAL
HEAD DRIVER
CORE MAIN UNIT ASSY
A
(RWZ4334)
DIN
4M–DRAM
(IC103)
M5M4V4400CTP-7
1–5, 9–12, 14–18, 22–25
EFM
7
(IC116)
BD7910FV
B
66
26–29, 32–37, 39–46
DADATA
74
ADDATA
73
ENC/DEC
+
DIGITAL SERVO
(IC102)
LR376487
64, 65
X'tal
(X101)
33.8688MHz
15, 18, 19, 29, 40, 80, 44–54
DSCK
37
DSTB
34
MDDATA
35
C
SYSDATA
RESET
P–DOWN
36
12
25
31–33, 55
EEP–ROM
BR93LC56F
82–86, 89–100
MECHA CONTROL
µCOM
(IC104)
PD5523A
3–6
(IC110)
EFMO
50
EFMI EFMO
3
FODF
18
FODR
19
TRDF
20
TRDR
21
SLDF
22
SLDR
23
SPDF
24
25
DIFFERENTIAL
27
28
57
59
92
23
89
190
PLOAD
RLOAD
3
2
AMP
(IC112)
BA4510F
LD+
LD-
SW1
DISC
LOAD SW
LOAD SW
SPDR
(S101)
(S102)
40
20
23
7
16
FODR
15
TRDF
31
TRDR
6
SLDF
25
SLDR
M56758FP
26
37
24
23
RF–AMP
(IC101)
IR3R55M
FODF
DRIVER
(IC106)
17
15
2
4
3
1
13
9
12
8
LOADING MOTOR
31
30
29283534
13
16
17
21
PICKUP
REC HEAD
ASSY
25–28
SLED MOTOR
(CARRIAGE)
SPINDLE MOTOR
INSIDE SW
(S701)
DISC SW
(S702)
CORE SW
B
UNIT ASSY
(RWZ4335)
D
10
1234
MJ-L77
11
1
23
MJ-L77
3.3 CORE MAIN UNIT and CORE SW UNIT ASSYS
CORE MAIN
A
A
UNIT ASSY
(RWZ4334)
1
4
2
3
B
CN101
CN102
PICKUP
ASSY
CN105
C
(CARRIAGE)
1011
8
CN701
CN103
9
D
CORE SW
UNIT ASSY
(RWZ4335)
B
12
A
B
1234
5
¶ 1 – - are waveform numbers on pages 16 and 17.
678
6
4
SIGNAL ROUTE
: DIGITAL PB SIGNAL
: DIGITAL REC SIGNAL
: DIGITAL I/F
5
: RF SIGNAL
MJ-L77
A
B
C
CN104
C
CN401
D
A
5
6
7
8
13
MJ-L77
Voltages of CORE MAIN UNIT ASSY
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
IC101
VOLTAGE
0.78V
0.73V
0.77V
0.75V
1.61V
1.61V
0.75V
1.61V
1.61V
1.61V
1.61V
1.61V
3.19V
3.19V
0V
0V
3.19V
0V
0V
1.5V
3.2V
0V
0V
3.19V
2.0V
0V
1.40V
1.42V
1.40V
1.63V
1.61V
1.61V
0V
0V
0V
1.62V
0.59V
1.61V
1.61V
1.61V
1.61V
3.19V
0V
1.08V
1.61V
1.61V
0V
0.74V
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
VOLTAGE
IC102
1.53V
3.18V
1.65V
0V
1.42V
0V
1.59V
1.41V
1.97V
1.39V
1.64V
3.18V
0V
0V
0V
0V
1.69V
1.52V
1.70V
1.47V
1.47V
1.65V
1.54V
1.69V
1.51V
0.82V
2.0V
2.0V
1.81V
1.4V
0.82V
1.67V
1.67V
1.67V
2.86V
1.32V
2.23V
0V
2.4V
1.2V
1.5V
0V
2.0V
3.0V
1.2V
1.2V
0.02V
3.04V
1.57V
0.05V
PIN
NO.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
VOLTAGE
1.59V
0V
0V
1.59V
0V
0V
0V
0V
0V
0V
0.56V
3.18V
0V
1.5V
1.5V
3.2V
1.6V
0V
0V
1.6V
1.6V
1.48V
0V
0V
1.68V
1.82V
1.59V
0.35V
0.02V
3.2V
3.2V
0.02V
0.03V
1.9V
1.56V
3.1V
3.2V
0V
3.19V
1.4V
1.4V
1.4V
0.8V
1.5V
1.4V
1.5V
1.3V
3.2V
3.2V
0V
PIN
NO.
1
2
3
4
5
9
10
11
12
13
14
15
16
17
18
22
23
24
25
26
IC103
VOLTAGE
1.2V
1.2V
3.0V
2.0V
0V
2.23V
1.32V
2.86V
1.67V
3.18V
1.67V
1.67V
1.67V
2.86V
1.32V
2.23V
2.4V
1.2V
1.5V
0V
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
IC104
VOLTAGE
3.2V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
3.1V
1.5V
0V
1.5V
3.2V
3.2V
3.1V
0V
0V
0V
3.2V
3.2V
0V
3.2V
3.2V
0V
0V
2.4V
0V
0V
0V
0V
1.6V
1.0V
0V
2.8V
0V
0V
0V
3.19V
3.2V
0V
0V
3.2V
3.2V
1.3V
1.5V
1.4V
1.5V
PIN
NO.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
VOLTAGE
0.8V
1.4V
1.4V
1.4V
0V
0V
0V
0V
3.2V
0V
0V
3.2V
0V
0V
3.2V
0V
0V
0V
0V
0V
0V
3.1V
3.2V
0V
0V
3.2V
0V
0V
0V
3.2V
0V
0V
0V
3.19V
0V
3.18V
3.2V
0V
2.2V
1.2V
0.56V
1.49V
2.5V
0.88V
0.90V
0V
0.87V
3.2V
3.2V
0V
14
MJ-L77
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
IC106
VOLTAGE
1.6V
0.49V
1.61V
4.99V
4.99V
1.61V
1.62V
2.46V
2.51V
0V
0V
2.54V
2.45V
1.62V
1.62V
1.61V
3.17V
0V
1.61V
1.61V
1.61V
1.61V
1.36V
1.36V
1.61V
1.61V
1.63V
2.41V
2.55V
2.47V
2.48V
0V
0V
2.79V
2.18V
0V
1.69V
5.0V
4.99V
1.67V
1.69V
1.69V
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
PIN
NO.
1
2
3
4
5
IC109
VOLTAGE
2.77V
2.77V
3.2V
1.58V
1.58V
1.56V
0V
0V
0V
0V
0V
0V
0V
3.2V
IC114
VOLTAGE
0V
4.19V
3.21V
2.81V
0V
PIN
NO.
1
2
3
4
5
6
7
8
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
IC110
VOLTAGE
0V
3.2V
0V
3.2V
0V
0.11V
0V
0V
IC116
VOLTAGE
4.98V
0V
0V
4.99V
3.2V
0V
0.03V
3.18V
0V
0V
0V
0.22V
0V
0.25V
0.25V
2.82V
0.16V
4.94V
2.82V
1.33V
PIN
NO.
1
2
3
4
5
6
7
8
IC112
VOLTAGE
1.66V
1.62V
1.62V
0V
1.67V
1.67V
1.67V
3.19V
PIN
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
IC113
VOLTAGE
4.95V
3.96V
0V
0V
0V
0V
0V
0V
4.94V
4.12V
3.19V
0V
0V
4.94V
15
MJ-L77
Waveforms
Note: The encircled numbers denote measuring point in the schematic diagram and the PCB connection diagram.
IC101-pin35 (ADIPO)
1
(CORE MAIN UNIT ASSY)
MODE: PLAY
DISC: GGF1328 (MMD–212)
DC500mV/div., 10 µSec/div.
IC102-pin50 (EFMO)
4
(CORE MAIN UNIT ASSY)
MODE: REC
DISC: GGF1328 (MMD–212)
DC1V/div., 0.2 µSec/div.
–– GND
–– GND
IC101-pin30 (WBO)
2
(CORE MAIN UNIT ASSY)
MODE: PLAY
DISC: GGF1328 (MMD–212)
DC1V/div., 10 µSec/div.
IC102-pin75 (FE MON)
5
(CORE MAIN UNIT ASSY)
MODE: PLAY
DISC: TGTS1 or MMD–110
DC100mV/div., 2mSec/div.
–– GND
–– GND
IC102-pin1 (EFM MON)
3
(CORE MAIN UNIT ASSY)
MODE: PLAY
DISC: TGTS1 or MMD–110
DC500mV/div., 0.5mSec/div.
Measurement Method
FE MON
39 kΩ
REFO
(MD Mechanism Assy TP)
–– GND
To Oscilloscope
820pF
IC102-pin77 (TE MON)
6
(CORE MAIN UNIT ASSY)
MODE: PLAY
DISC: TGTS1 or MMD–110
DC500mV/div., 2mSec/div.
CN103-pin1 (SLD +)
8
(CORE MAIN UNIT ASSY)
MODE: PLAY
DC500mV/div., 2mSec/div.
–– GND
–– GND
Measurement Method
TE MON
9
39 kΩ
REFO
(MD Mechanism Assy TP)
CN103-pin4 (SP +)
(CORE MAIN UNIT ASSY)
MODE: PLAY
DC500mV/div., 5mSec/div.
To Oscilloscope
820pF
–– GND
CN105-pin1 (LOAD –)
10
(CORE MAIN UNIT ASSY)
MODE: STOP
DC1V/div., 1mSec/div.
–– GND
16
MJ-L77
CN105-pin1 (LOAD –)
11
(CORE MAIN UNIT ASSY)
MODE: EJECT
DC1V/div., 1mSec/div.
IC602-pin20 (DA DATA)
14
(MAIN UNIT ASSY)
MODE: PLAY (1 kHz, 0 dB)
DC2V/div., 0.5 µSec/div.
–– GND
–– GND
IC602-pin28 (SYS CLK)
12
(MAIN UNIT ASSY)
MODE: STOP
DC2V/div., 50nSec/div.
IC602-pin23 (LRCK)
15
(MAIN UNIT ASSY)
MODE: PLAY (1 kHz, 0 dB)
DC2V/div., 10 µSec/div.
–– GND
–– GND
IC602-pin19 (AD DATA)
13
(MAIN UNIT ASSY)
MODE: REC (ANALOG)
DISC: GGF1328(MMD–212)
DC2V/div., 0.5 µSec/div.
IC602-pin22 (BCLK)
16
(MAIN UNIT ASSY)
MODE: PLAY (1 kHz, 0 dB)
DC2V/div., 0.2 µSec/div.
–– GND
–– GND
IC602-pin85 (LOUT)
17
(MAIN UNIT ASSY)
MODE: PLAY (1 kHz, 0 dB)
DC2V/div., 0.2mSec/div.
–– GND
IC603-pin1
18
MODE: PLAY (1 kHz, 0 dB)
AC2V/div., 0.2mSec/div.
(MAIN UNIT ASSY)
–– GND
17
1
23
MJ-L77
3.4 MAIN UNIT (1/2) , AF UNIT and TRANS. UNIT ASSYS
A
4
PB
DECK
CN4101
REC
MD
REC
MD
A
CN104
B
PB
MD
REC
MD
PB
MD
REC
MD
MD
PB
PB
MD
DECK
PB
CN4103
CN4104
C
5.0
4.7
C
5.0
14.0
D
– 5.0
MAIN UNIT ASSY (1/2)
C
1/2
(AWU7395)
– 16.0
18
C
1234
5
678
MJ-L77
SIGNAL ROUTE
MD
: MD AUDIO SIGNAL
PB
DECK
AF UNIT ASSY
D
(AWU7397)
REC
MD
REC
MD
DECK
PB
DECK
PB
MD
REC
PB
DECK
DECK
PB
REC
MD
CN4701
MD
REC
DECK
: DECK AUDIO SIGNAL
: DIGITAL PB SIGNAL
: DIGITAL REC SIGNAL
: DIGITAL I/F
A
MD
PB
situation of connected
to the CD RECEIVER
12.0
MD
REC
PB
MD
TRANS. UNIT ASSY
E
(AWU7396)
B
PB
CN4201
Short
DECK
MD
REC
W4049
W4048
MD
PB
CN4702
MD
REC
DECK
PB
REC
MD
CN4202
for TESTMODE
From STEREO CASSETTE DECK CT-L77
(Refer to RRV2199)
C
To STEREO CD RECEIVER XC-L77
(Refer to RRV2187)
CN4011
J4001
: The power supply is shown with the marked box.
5
6
W4035
Short
for TESTMODE
W4050
VEK1047
(T200mA 125V)
CN4001
AKP7005
D
C
7
8
19
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