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K-501-A
Owners Manual
28 pgs759.14 Kb0

Onkyo K-501-A Service manual

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Page 1
SERVICE MANUAL
SERVICE MANUAL
CASSETTE T APE DECK
K-501A
Ref. No. 3718
112001
MODEL
UPP UDT UGT
230-240V AC, 50Hz 120V AC, 60Hz 220-230V AC, 50/60Hz
K-501A
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ON THE SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE THESE COMPONENTS WITH ONKYO PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL. MAKE LEAKAGE-CURRENT OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER.
Page 2
SPECIFICATIONS
K-501A
Track format
4-tracks, 2-channels
Erasing system
AC erase
Tape speed
4.8 cm/sec.
Wow and flutter
0.1 % (WRMS)
0.2 % (DIN)
Frequency response
Metal position tape
30 to 15,000 Hz ± 3 dB
High position tape
30 to 14,000 Hz ± 3 dB
Normal position tape
30 to 13,000 Hz ± 3 dB
Signal to noise ratio
• 54 dB (metal position tape, Dolby NR off)
• Noise reduction of 10 dB above 5 kHz and 5 dB at 1 kHz is possible with Dolby B NR.
• Noise reduction of 20 dB at 5 kHz is possible with Dolby C NR.
Input Jacks
LINE IN: 2
Input sensitivity: 500 mV Input impedance: 50 kohms
Output Jacks
LINE OUT: 2
Standard output level: 500 mV Output load impedance:
over 50 kohms
Motors
DC servo motor: 1
Heads
REC/PB: Special Hard Permalloy: 1 Erase head: Ferrite: 1
Power supply rating
AC 230-240 V, 50 Hz AC 220-230 V, 50/60 Hz AC 120 V, 60 Hz
Power consumption
13 W (230-240 V, 50 Hz)
(220-230 V, 50/60 Hz)
14 W (120 V, 60 Hz)
x
Dimensions (W H D) 155 mm x 94 mm x 303 mm 6-1/8" x 3-11/16" x 11-15/16"
(AC 230-240 V, 50Hz)
(AC 220-230 V, 50/60Hz) 155 mm x 94 mm x 297.5 mm 6-1/8" x 3-11/16" x 11-11/16"
(AC 120 V, 60Hz)
Weight
2.5 kg, 5.5 lbs
Specifications and external appearance are subject to change without notice as a result of product improvement.
x
SERVICE PROCEDURES
CIRCUIT NO. PART NO. DESCRIPTION F901 252074 2A-SE-EAK,Fuse <PP,GT>
<PP>...Europian model only <DT>...120V model only <GT>...220-230V model only
Page 3
P ANEL VIEW
FRONT PANEL
K-501A
STANDBY/ON button STANDBY indicator
/ Rec/Pause button
FADE button/FADE indicator
ALBUM button/ALBUM indicator
STEREO CASSETTE TAPE DECK
CASSETTE LOADING MECHANISM
STANDBY / ON
BC
STANDBY
CD DUBBING
ALBUM
Rec/Pause indicator
Cassette in indicator
Eject button
FADEREV MODEDOLBY NR
DOLBY NR indicator DOLBY NR button
REV MODE indicator REV MODE button
Auto space button
Cassette slot
Forward/reverse side play button
-
K
5 01
Stop button
Fast-forward/Rewind Skip button
A
,
,
Page 4
K-501A
EXPLODED VIEW
P901A
A9
S1
F901
P702AP702A
P703A
U2
T901
S4
S2
A17
A19
A7
A18
U1
S1
P101A
U3
S1
A16
A2
A15
S3
A14
S1
S1
A8
Z1
A5
A6
S1
A2
A17
A3
A4
A11
A1
A12
A13
A10
Page 5
PARTS LIST
EXPLODED VIEW
REF. NO. PART NO. DESCRIPTION
27111266
A1
27191165
A2
28198948
A3
28148505
A4
27180583
A5
28325983
A6
27100415
A7
27191164
A8
27300750
A9 A10 A11 A12 A13 A14 A15 A16 A17 A18
27212366 28198939 28198946 28198947 28184832 28140079 28141492 28141489 27122947A 27122948A 27122949A
A19
F901
260208
252074 P101A 2009990714 P702A 20022392618 P703A 20022391010
Front bracket Holder (Door) Facet(IN) Door Spring Recording button ass'y Chassis Holder (Mechanism) #2271,Bushing Front panel Facet(S) Facet(PLAY) Facet(NR) Cover Cushion Cushion Cushion Rear panel <DT> Rear panel <GT> Rear panel <PP> Binder 2A-SE-EAK,Fuse <PP,GT> NSAS-14P0999,Socket ass'y NSAS-26P0998,Socket ass'y NSAS-10P0997,Socket ass'y
P901A 253334HRK AS-CEE,Power supply cord <PP,GT>
253331HDK or
253330MIL
T901 2301571
2301572
2301573
U1 1N283583-1B
1N283583-1C
1N283583-1D
U2 1N283584-1B
1N283584-1C
1N283584-1D
U3 1N283585-1B
1N283585-1C
1N283585-1D
244248A
Z1
838130088
S1
830440089
S2
838930088
S3
838430088
S4
AS-UC-2,Power supply cord <DT> AS-UC-2,Power supply cord <DT> NPT-1434D,Power Transformer <DT> NPT-1434G,Power Transformer <GT> NPT-1434P,Power Transformer <PP> NAAF-7383-1B,Main circuit PC board <DT> NAAF-7383-1C,Main circuit PC board <GT> NAAF-7383-1D,Main circuit PC board <PP> NAPS-7384-1B,Power supply PC board <DT> NAPS-7384-1C,Power supply PC board <GT> NAPS-7384-1D,Power supply PC board <PP> NADIS-7385-1B,Display circuit PC board <DT> NADIS-7385-1C,Display circuit PC board <GT> NADIS-7385-1D,Display circuit PC board <PP> CMAL2Z815A,Cassette Mechanism 3TTB+8B,Self tapping screw 4TTC+8C(BC),Self tapping screw 3TTB+8B(UN),Self tapping screw 3TTB+8B(BC),Self tapping screw
K-501A
Note <PP>...Europian model only <DT>...120V model only <GT>...220-230V model only
THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE ONLY WITH PART NUMBER SPECIFIED.
Page 6
EXPLODED VIEW
CASETTE MECHANISM
K-501A
F REC
METAL
PACK
C
R REC
PARTS LIST
REF.NO PART NO. DESCRIPTION
1 FF18W- F/R belt 2 FF19Y- Main belt 3 F567-626 Switch PC board ass'y 4 FF26K- Flywheel ass'y 5 F513-891 Recording/Play head ass'y 6 F514-129 Pinch roller R 7 F514-130 Pinch roller L 8 F522-064 Clutch 9 F522-052 Clutch
10 FD52Y- Master cam
Page 7
BLOCK DIAGRAM
K-501A
R/P HEAD
X
IN
LINE
OUT
ERASE HEAD
X
POWER TRANSFORMER
and REGULATOR
P.B.AMP.
Q101
BIAS OSC and HX PRO
Q401 Q405
L401,L402,L403
T901
D901,D902
70/120
Q103,Q104
12V(for SIGNAL)
Q901
12V(for MECHA)
P.B.LEVEL
R115,R116
5V(for MICROPROCESSOR)
Q905Q903
DOLBY NR,REC EQ,METER AMP
Q201Q102
MICROPROCESSOR
Q701
KEY CONTROL&DISPLAY
D801-D810
S717
AUTO
ADJUSTMENT
START KEY
TAPE SPEED
R716
MECHA and DRIVER
Q705 Q706 Q712 Q713
Q703 Q704
D905,D906
-22V(for FL tube) Q906
K-501A
Page 8
K-501A
NNORM16 NR ON/OFF45
12K
A
SCHEMATIC DIAGRAM 1
1
U1
Main circuit PC board
X
X
P
X
P101
2
9
REC L
REC R
3
(1/2W)
R410 47
C421
100/500
R418
39K
45
123
6
L403
NLO-2059
4
P401
P
C420
123/100
C419
47/16
C103
2.2/50
C101 681
R101100K
5
6
7
8
Q101
C412
121/100
L402
NCH-4183
4
6 123
11121314151617
Q401 MPC1297CA
8
910
L401
123
4
10
R413
47/16
(1/2W)
C427 183
C411
121/100
4.7
R416
6
Q405
4.7
R417
C414
C104
2.2/50
R/P
MPC1330HA
101/100
7
C409
101/100
2SC1213C
R103
C102
681
R102
100K
4
C410
C408
273
6
C407
273
NCH-4183
2SC1213C
470
R104
470
Q404
P.B.LEVEL
3
273
C406
R404 330K
5
R403
330K
273
L405
C423 C425
223
C418
BCD
C243 1000/16
INPUT(R)
INPUT(L)
OUTPUT(R)
OUTPUT(L)
P204
Q102MPC1228HA
R ch L ch
5
6
7
8
183
DTC114TS
C114
10/16
C413
100/16
C422
10/16
R405
3.3K
2SA950
R412
5.6K
Q402
DTC114YS
R106 390K
R108
C106
822
C108 100/16
R110
120
22K
R408
R411 39K
Q403
BIAS ON/OFF
8.9
R409
BIAS_CONT
C113
15K
R406
3.3K
220/6.3
470/16
120
C415
(1/2W)
R117 120
(1/2W)
R112
C110
1.5K 10/16
R120
1.5K
R114
3.9K
R116 47KB
C112
Q104
70/120
1
2
R118 1K
R/P
471
C404
R402
100K
103
C402
18
1
2
3
4
R401
100K
103
C401
471
C405
C403
22K
R407
4.7MH
681 680
472
39K
R414
C417
C416 472
39K
R415
4
15K
R107
100/16
3
C107
R109
R105
390K
C105
822
120
70/120
12V
C426
680
C424
681
L406
4.7MH
2
C109
10/16
P.B.LEVEL
R113
C111
DTC114TS
REC_L
DAC_R
70/120
R/P
1
Q103
REC_R
DAC_L
R111
1.5K
R115
3.9K 47KB
183
70/120
R119
1.5K
R285 R221 R283 R284
4.7K
4.7K
4.7K
4.7K
223
C282
C248
C283 223
104
Q203
NC
153
C246
400/12K
UDZS4.7B
D203
DTA114YS
LINE MUTE
R222
R214
2.2K
R213
2.2K
C238
R219
1.8K
Q207 DTC114YS
R278
10K
18K
C228
R212
R211 68K
C227
1/50
Q205
2SD655
OSC
R270 6.8K
Q206
2SD655
1.8K
R220
L204
NMC-6079
123
R216
C232
C230 10/16
1/50
C226
68K
C225
1/50
C229 C231
R215
123
L203
NMC-6079
R269 6.8K
R276
330K
C247
394
Q204
DTA114YS
R218
54 6
3.3K
10/16
10/16
10/16
10/16 10/16
3.3K
6 54
R217
R267
R275
1K
1K
6.8K
6.8K
390K
R274
OSC_OUT
R268 1K
10/16
C242
C241
C281
R281
REC_MUTE
222
104
C210
C208
C204
222
R202 22K
61 62 63 64
RPI[R]PBIN65
66
VRI2[R]ACCUIN
67
CONT[R]68 VRI1[R]LINEIN69 GND270 GND171 VRI1[L]LINEIN72 CONT[L]73 VRI2[L]ACCUIN74
75
RPI[L]PBIN76 77 78 79 80
R201 22K
C203
222
10/16
222
C207
1/50
1K
REC_R
C206
C205
104
C209
CLK
2.2/50
HLSL6 HLSR 55
REC_L
C218
1K
R208
6.8K
R206
1/50
C216
HA12169FB
LLSL7 LLSR 54
RECOUT[L]8 RECOUT[R]53
1/50
C215
6.8K
R205
R207
C220 1/50
Q201
LMIN[L]9 LMIN[R] 52
C219 1/50
1K
P706A
LMDET[L]10 LMDET[R]51
LEVEL_R
2
10 11 12 13
100K
R271
1
3 4 5 6 7 8 9
100K
R272
10/16
C235 4.7/50
C224
C222
10/16
R210
10K
DGND47
EQCONT[L]13 EQCONT[R]48
EQIN[L]12 EQIN[R] 49
EQOUT[L]15 EQOUT[R]46
IREF14
LMOUT[L]11 LMOUT[R]50
10K
4.7/50
C233
R209
10/16
12K
R279
C221
R273
12K
10/16
R223
C223
LEVEL_L
P706
C214
104
C212 104
560R203 560
222
R204
BIA_TRAPL1 BIA_TRAPR60
PBOUT[L]2 PBOUT[R]59
SS1L3 SS1R 58
SS2L4 SS2R 57
CCRL5 CCRR 56
222
C213
104
C217
C211 104
2.2/50
DAC_L
DAC_R
STB
DO
RESET
5
P901A
NC: No used
NAAF-7383
U2
Power supply circuit PC board
T901
FUSE_B
2A/250V
FUSE A FUSE B
FUSE_A
NPT-1434*
245
6
7
* NPT-1434D<DT> NPT-1434G<GT> NPT-1434P<PP>
AC-H
AC0
AC-G
P901
F901B
F901
F901A
AC0
P902
NAPS-7384
C901
104
5.6V
12V
GND
R916
D908
R914
R917 10K
560
D909
1SS352
470
R915
470
AC1 AC1
AC2 AC2
D910
UDZS5.6B
C916
10/16
1SS352
104
C904
C903
104
C917
D901
GP1N4003
104
D902
GP1N4003
C905
4700/25
PING
P903A
P903
C907
78M12
I
Q903
G
E854
+12VSIG
12V
O
C909
1000/16
Q901 78M12
I
O
G
1000/16
22V
GND3
MUT
12V1
12V2
12V3
GND2
5.6
R725
330K
C701
2.2/50
Q710
DC1
Q905
78M05
DC1
O
I
G
C915
100/16
D706
1SS352
DTC114YS
C702
223
R726
Q711
DTA114YS
C703
223
3.9K
Page 9
K-501A
H
3
1K
6
8K
R
K
1/501/50
A
SCHEMATIC DIAGRAM 2
TEST POINT
P205
LCHRCH
R229
R234
2.2M
R734
D202
56K
2.2M
2.7K
C234
4.7/50
1SS352
3.3K
R265
47K
56K
12V
C239
104
R225
100K
68K
R256
NC
NC
R257 2.2M
680K
R246
56K
R247
68K
R237
47K
100K
NC
R236
100K
3.9K
R703
3.9K
R702
3.9K
R733
2.7K
R732
2.7K
R731
100K
4.7/50
4.7/50
R272
10/16
C235
100K
R271
1
3 4
5 6
7 8 9 10 11
C236
C224
C222
10/16
R210
10K
C/B 44
DGND47
BIASADJ[H] 37 BIASADJ[M] 36 BIASADJ[N] 35
BIASCONT[R]33
BIASCONT[L] 28
EQCONT[L]13 EQCONT[R]48
EQIN[L]12 EQIN[R] 49
EQOUT[L]15 EQOUT[R]46
IREF14
LMOUT[L]11 LMOUT[R]50
N.HIGH17
N.NORM16 NR_ON/OFF45
10K
4.7/50
C233
R209
10/16
12K
R279
C221
R273
12K
12K
10/16
R223
R227 10K
C223
LEVEL_L
P706
1
C220 1/50
.
Q201
A12169FB
2
LMDET[L]10 LMDET[R]51
LMIN[L]9 LMIN[R] 52
1/50
C219
205 6.8
1K
R207
LEVEL_R
3
P706A
2
4
12 13
S
1M
R280
4.7/50
C237
R233
R232 10K
MPX43
RST42
STB41
DATA40 CLK 39 INJ 38
GND 34
DACOUT[R]32
VCC2 VCC1 30
DACOUT[L]29
FM 27 FQ 26
F/Q 25
GH 24 GL 23 GP 22
N.MTL18
19
20
D201
R282
1M
DTC114TS
Q209
C249
10K
31
21
1SS352
223
Q210
DTC114TS
R266
R254
R255
R244
NC R245 2.2M
R235
5
3
R704
2.7K
R228 10K
R264 47K
R226
100K
R258
82K
R248
68K
R238
33K
R735
R736 3.3K
R224
12K
C250 223
C240
R259 33K
R249 39K
R239 33K
C709 104
10K
5V
R231
R230
104
10K
10K
DOL_B1 TAPE_IN2 R.PLY13 R.PLY24 F.PLY15 F.PLY26 NC17 NC28 NC39
NC410 NC511 NC612 NC713 DOOR_LOCK_OPEN14 P-OFF15 R.REC16 MTL_SW17 F.REC18 NC819
BCD
NOTE
U1
Main circuit PC board
68K
82K
82K
NC
DOL_C63
DI21
NC
STBY62
ALBUM61
LED
TMP87CH14F
CS23
DO22
56
R262
R263 2.2M
R252
R253 390K
R242
R243
REC59
VDD58VSS26
FADE60
Q701
STB24
TEST[VSS]25
CST8.00MG
12
34 Q702
7
8
#1,#8 NC
390K
100K
2.2M
5V
X701
390K
NC
NC
NC
VAREF57
XIN27
KEY254
VASS56
KEY3[NC]55
BIAS_CONT49
LINE_MUTE46
REC_MUTE42
CLOSE_SW40
ROT.SEN.37
DOOR_CLOSE36
DOOR_OPEN35
RESET29
CASS_IN30
XOUT 28
LM[R] 51 LM[L] 50
70/120 47
OSC_OUT45 400/12K 44 DOL_RST43
OPEN_SW41
RI_OUT39
RI_IN 38
HIGH_SW31 KEY153
R260
NC R261 2.2M
R250
R2512.2M R241
R240 2.2M
64
REV.M
CLK20
BR93LC46F-WE2
FT52
R/P 48
SOL 34 CAP 33
32
3.9K
R706
R705
PLAY
R707
3.9K
3.9K
R727
3.9K
R730
2.7K
R729
R737
R728
2.7K
5V
Q703
2SA933
10K
Q704
DTC114YS
R712
2.7K
1M
R723
2.7K
.
THECOMPONENTS REPLACEONLY
.
VOLTAGE(MEASUREDWITHVOLTMETER) IS
.
ALL PNP TRANSISTORS ARE EQUIVALENT
.
ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED.
.
ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED.
.
ELECTROLYTIC CAPACITORS ()ARE IN F/WV.
.
ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED.
EX) 030-3pF 330-33pF 331-330pF 333-0.033uF
.
ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED.
.
THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.
EX) PRINTING SIDE
.
CIRCUIT IS SUBJECT TO CHANGE FORIMPROVEMENT.
R804
R803
R802
FT-1
S717
FT-2
R724
390
R746
3.9K
R745
3.9K
223
C704
R708
10K
R709
22K
12V
R801
IDENTIFIED
WITH PART
P705
470
820
470
820
RI
1MH
L702
R722
D708
NC
L701
223
223
5V
R713 3.9K
Q712
DTC114YS
1MH
Q708
DTA114YS
C710
R718
SOL
Q713
R714
C711
CAP
ARECRITICAL FOR
BYMARK
NUMBERSPECIFIED.
TO 2SA1015-GR UNLESS OTHERWISE NOTED.
U3
Display circuit PC board
P705A
GND4
STBY
DOLBY NR
REV.MODE
AUTO SPACE
REC/PAU
RI
P701
3
2
C918
223
R744
390K
UDZS5.6B
R721
D703
1SS352
47K
9
8
7
6
5
Q707 TA7291S
4
3
2
1
47K
R717 Q706
3.9K 2SB1068
DTC114YS
1SS352
D701
47K
SAFETY
DCVOLTAGE.(NO INPUT SIGNAL)
u
NC:Noused
D803
R807
470
D804
R808
270
R809
R810
R811
R812
R805
R806
S801
S802
S803
S804
S805
SEL6910D
270
D805
470
D806
D807
470
D808
470
D809
470
470
D810
D802
D801
S806
S807
390
R813
S808
470
R814
S810
820
R815
S809
1K
R816
S811
S812
S813
NADIS-7385
1
470
Power supply circuit PC board
R750 100K
UDZS7.5B
D702
R720
1.8K
C705
100/16
R751
100K
12V
TAPE SPEED ADJ.
R715
12K
R716
5KB
Q705
P702
2SB1068
LOAD OUT LOAD IN LOAD OUT SW GND LOAD IN SW
P703
MTR SPEED A MTR SPEED B GND MTR PLAY SW 5V ROT SEN SOL HIGH SW CASS IN SW F.REC SW MTL SW R.REC SW
SEL6910D
SEL6910D
SLV332VR
SLV332VR
SEL6910D
DOLBY B
SEL6910D
TAPE IN
SEL6910D
SEL6910D
SEL6910D
U2
REC
FADE
ALBUM
STANDBY
DOLBY C
REV.MODE
R.PLAY
F.PLAY
EJECT
390
R817
FF
470
R818
REW
820
R819 R.PLAY
1K
R820
F.PLAY
1.8K
R821
STOP
R822
3.9K ALBUM
10K
R823
FADE
TO MECHANISM
TO MECHANISM
Page 10
K-501A
A
SCHEMATIC DIAGRAM
U1
1
X
X
2
3
4
Power supply circuit PC board
P901A
5
X
P401
NAAF-7383
NAPS-7384
U2
AC-H
AC-G
P901
P902
Main circuit PC board
P101
9
REC L
REC R
(1/2W)
C414
R410 47
C421
100/500
R418
39K
45
123
6
L403
NLO-2059
C419
47/16
C420
123/100
245
AC0
F901B
FUSE_B
F901
2A/250V
F901A
FUSE_A
AC0
* NPT-1434D<DT> NPT-1434G<GT> NPT-1434P<PP>
C103
2.2/50
C101 681
R101100K
5
6
7
8
Q101
C412
121/100
L402
NCH-4183
4
6 123
11121314151617
Q401 MPC1297CA
7
8
910
L401
123
4
6
47/16
101/100
C411
121/100
R413
10
(1/2W)
Q405
4.7
C427 183
4.7
R416
R417
T901
NPT-1434*
6
7
R103
470
C104
R104
2.2/50
470
C102
681
R102
100K
R/P
4
MPC1330HA
C410
101/100
C408
273
6
C407
273
NCH-4183
C409
2SC1213C
Q404
2SC1213C
C901
104
P.B.LEVEL
3
273
C406
R404 330K
5
R403 330K
273
L405
C423 C425
223
C418
5.6V
12V
D908
GND
2
R916
R914
R116 47KB
4
4.7MH
C405
681 680
C416 472
BCDEFGH
TEST POINT
R112
1.5K
R120
1.5K
Q104
70/120
1
471
C404
R402
103
C402
3
103
C401
471
C403
472
C417
39K
R415
R917 10K
560
D909
1SS352
470
R915
470
AC1 AC1
AC2 AC2
R ch L ch
7
8
R106
C110
10/16
390K
C106 822
R114
3.9K
C108
100/16
183
C112
R110
120
DTC114TS
C114
10/16
R118 1K
R/P
C413
100/16
100K
18
1
2
R401
100K
C422
10/16
R405
3.3K
22K
R407
Q403
39K
2SA950
R412
R414
5.6K BIAS ON/OFF
Q402
DTC114YS
D910
UDZS5.6B
C916
10/16
1SS352
C903
104
C904
6
15K
R108
8.9
R409
22K
R408
R411 39K
BIAS_CONT
104
C917
D901
GP1N4003
104
D902
GP1N4003
C905
4700/25
INPUT(R)
INPUT(L)
OUTPUT(R)
OUTPUT(L)
Q102MPC1228HA
4
5
C113
470/16
(1/2W)
R117 120
120
(1/2W)
R406
3.3K
C415
220/6.3
22V
R107
100/16
P205
C234
4.7/50
R265
47K
R225
100K
R703
2.7K
68K
680K
100K
100K
NC
68K
3.9K
R731
R704
2.7K
R228
10K
R264
47K
LCHRCH
R226
100K
R258
82K
R248
68K
R238
33K
R735
R736 3.3K
R224
12K
C250
223
C240
R259 33K
R249
39K
R239
33K
C709 104
10K
5V
R231
10K
R230
10K
104
DOL_B1 TAPE_IN2 R.PLY13 R.PLY24 F.PLY15 F.PLY26 NC17 NC28 NC39
NC410 NC511 NC612 NC713 DOOR_LOCK_OPEN14 P-OFF15 R.REC16 MTL_SW17 F.REC18 NC819
68K
R260
NC
R261 2.2M
R250
82K
NC R2512.2M R241
82K
NC
R240 2.2M
64
REV.M
STBY62
ALBUM61
DOL_C63
LED
TMP87CH14F
CS23
DI21
DO22
CLK20
56
BR93LC46F-WE2
R262
R263 2.2M R252
R253 390K R242
R243
REC59
VDD58VSS26
FADE60
Q701
STB24
TEST[VSS]25
CST8.00MG
12
34 Q702
7
8
#1,#8 NC
390K
390K
100K
2.2M
5V
X701
NC
NC
NC
VASS56
VAREF57
XIN27
XOUT 28
FT52
KEY254
LM[R] 51 LM[L] 50
KEY3[NC]55
BIAS_CONT49
R/P 48
70/120 47
LINE_MUTE46
OSC_OUT45 400/12K 44 DOL_RST43
REC_MUTE42
OPEN_SW41
CLOSE_SW40
RI_OUT39
RI_IN 38
ROT.SEN.37
DOOR_CLOSE36
DOOR_OPEN35
SOL 34 CAP 33
RESET29
HIGH_SW31 KEY153
CASS_IN30
32
PLAY
R707
3.9K
R706
3.9K
R705
3.9K
R727
3.9K
R730
2.7K
R729
R737
R728
2.7K
2.7K
5V
Q703
2SA933
10K Q704
DTC114YS
R712 1M
R723
2.7K
FT-1
R724
390
C704
FT-2
223
R746
3.9K
R745
3.9K
R708
12V
R804
R803
S717
R802
10K
R709
22K
R801
P705
470
820
470
820
P701
1MH
L702
R722
D708
NC
UDZS5.6B
L701
1MH
223
5V
R713 3.9K
Q712
DTC114YS
DTA114YS
C710
SOL
Q713
Q708
R718
1SS352
R714
CAP
C711
223
C243 1000/16
R270 6.8K
R285
4.7K
R221
4.7K
R283
4.7K 104
C248
R284
4.7K
P204
1
2
3
R111
C109
R105
1.5K
10/16
390K
15K
C105 822
C107
R109
120
70/120
12V
I
C426
680
C424
681
L406
4.7MH
Q901 78M12
G
P.B.LEVEL
R113
C111
DTC114TS
REC_L
DAC_R
70/120
R/P
O
C907
1000/16
Q103
REC_R
DAC_L
78M12
I
R115
3.9K 47KB
183
70/120
Q903
G
R119
1.5K
PING
P903A
P903
E854
+12VSIG
12V
O
C909
1000/16
223
NC
C282
C283 223
GND3
MUT
12V1
12V2
12V3
GND2
DC1
Q905
78M05
DC1
O
I
G
C915
100/16
UDZS4.7B
D203
Q203
DTA114YS
R214
2.2K
R213
2.2K
153
C246
R219
1.8K
400/12K
R278
10K
LINE MUTE
18K
R222
C228
R212
R211 68K
C227
C238
1/50
Q205
2SD655
Q207 DTC114YS
OSC
Q206
2SD655
1.8K
R220
L204
NMC-6079
123
R216
C232
C230 10/16
1/50
C226
68K
C225
1/50
C229 C231
R215
123
L203
NMC-6079
R269 6.8K
330K
R276
C247
394
3.3K
Q204
6
3.3K
6
DTA114YS
R218
54
6.8K
10/16
10/16
10/16
10/16 10/16
54
R217
6.8K
R267
1K
1K
R275
390K
R274
R268 1K
10/16
C242
C241
C281
R281
REC_MUTE
OSC_OUT
2.2/50
D706
1SS352
222
104
C210
C208
C204
222
R202
61 62 63 64
66 67
75
77 78 79 80
R201 22K
C203
222
10/16
222
C207
1/50
1K
REC_R
5.6
R725
330K
C701
Q710
DTC114YS
C214
104
C212 104
C206
222
22K
RPI[R]PBIN65
VRI2[R]ACCUIN CONT[R]68 VRI1[R]LINEIN69 GND270 GND171 VRI1[L]LINEIN72 CONT[L]73 VRI2[L]ACCUIN74
RPI[L]PBIN76
SS1L3 SS1R 58
SS2L4 SS2R 57
BIA_TRAPL1 BIA_TRAPR60
PBOUT[L]2 PBOUT[R]59
C205
222
C213
104
C209 104
C211 104
2.2/50
STB
CLK
DO
RESET
223
C702
R726
560R203 560
R204
CCRL5 CCRR 56
C217
DAC_L
DAC_R
Q711
DTA114YS
3.9K
HLSL6 HLSR 55
REC_L
2.2/50
C218
1K
R208
6.8K
R206
1/50
C216
HA12169FB
LLSL7 LLSR 54
RECOUT[L]8 RECOUT[R]53
1/50
C215
6.8K
R205
R207
C703
223
C220 1/50
Q201
LMIN[L]9 LMIN[R] 52
1/50
C219
1K
P706A
LMDET[L]10 LMDET[R]51
LEVEL_R
2
10 11 12 13
100K
R271
1
3 4 5 6 7 8 9
100K
4.7/50
4.7/50
R272
10/16
C235
C236
C224
C222
10/16
R210
10K
C/B 44
DGND47
BIASADJ[H] 37 BIASADJ[M] 36 BIASADJ[N] 35
BIASCONT[R]
BIASCONT[L] 28
EQCONT[L]13 EQCONT[R]48
EQIN[L]12 EQIN[R] 49
EQOUT[L]15 EQOUT[R]46
IREF14
LMOUT[L]11 LMOUT[R]50
N.HIGH17
N.NORM16 NR_ON/OFF45
10K
4.7/50
C233
R209
10/16
12K
R279
C221
R273
12K
12K
10/16
R223
R227 10K
C223
LEVEL_L
P706
1M
R280
4.7/50
C237
R233
R232 10K
STB41
RST42
MPX43
DATA40 CLK 39 INJ 38
GND 34
DACOUT[R]32
VCC2 31 VCC1 30
DACOUT[L]29
FM 27 FQ 26
F/Q 25
GH 24 GL 23 GP 22
N.MTL18
19
20
D201
R282
1M
DTC114TS
Q209
C249
10K
33
21
1SS352
223
Q210
DTC114TS
D202
R229 3.3K
R266
R254
R255
R244
NC R245 2.2M
R235
R234
2.2M
R734
56K
2.2M
2.7K
56K
47K
12V
NC
NC
1SS352
56K
3.9K
R733
C239
104
R256
R257 2.2M R246
R247 R237
R236
3.9K
R702
2.7K
R732
NOTE
.
THECOMPONENTS
REPLACEONLY
.
VOLTAGE(MEASUREDWITHVOLTMETER) IS
.
ALL PNP TRANSISTORS ARE EQUIVALENT
.
ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED.
.
ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED.
.
ELECTROLYTIC CAPACITORS ()ARE IN F/WV.
.
ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED. EX) 030-3pF 330-33pF 331-330pF 333-0.033uF
.
ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED.
.
THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS. EX) PRINTING SIDE
.
CIRCUIT IS SUBJECT TO CHANGE FORIMPROVEMENT.
P705A
GND4
STBY
DOLBY NR
REV.MODE
AUTO SPACE
REC/PAU
RI
S801
S802
S803
S804
S805
R808
R809
R811
R807
R810
R812
R805
R806
IDENTIFIED
WITH PART
470
270
270
470
470
470
470
470
390
R813
470
R814
820
R815
1K
R816
NUMBERSPECIFIED.
D803 SEL6910D
D804
SEL6910D
D805
SLV332VR
D806
D807
SLV332VR
SEL6910D
D808
SEL6910D
D809
D810
SEL6910D
D802
SEL6910D
D801
S806
S807
S808
S810
S809
S811
S812
S813
NADIS-7385
3
1
2
C918
223
D703
3.9K
DTC114YS
47K
390K
R717
Q706
2SB1068
R721 47K
9
8
7
6
5
Q707 TA7291S
4
3
2
1
47K
D701
470
R744
R720
1.8K
12V
TAPE SPEED ADJ.
R715
12K
1SS352
R750 100K
UDZS7.5B
D702
C705
100/16
R751
100K
R716
5KB
Q705
P702
2SB1068
LOAD OUT LOAD IN LOAD OUT SW GND LOAD IN SW
P703
MTR SPEED A MTR SPEED B GND MTR PLAY SW 5V ROT SEN SOL HIGH SW CASS IN SW F.REC SW MTL SW R.REC SW
BYMARK
SEL6910D
DOLBY B
TAPE IN
SEL6910D
ARECRITICAL FOR
TO 2SA1015-GR UNLESS OTHERWISE NOTED.
SAFETY
DCVOLTAGE.(NO INPUT SIGNAL)
u
REC
FADE
ALBUM
STANDBY
DOLBY C
REV.MODE
R.PLAY
F.PLAY
EJECT
390
R817
FF
470
R818
REW
820
R819
R.PLAY
1K
R820
F.PLAY
1.8K
R821
STOP
3.9K
10K
R822
R823
U3
ALBUM
Display circuit
FADE
PC board
TO MECHANISM
TO MECHANISM
NC:Noused
Page 11
SCHEMATIC DIAGRAM
MECHANISM SECTION
Rec/Play/Erease Head
Control circuit PC board
R/P HD
E HD
K-501A
1. L +
L
2. L -
3. R -
R
4. R +
5. E -
6. E +
Main circuit PC board
UNLOAD SW COM LOAD SW MTR-(CW)(UNLOAD) MTR+(CCW)(LOAD)
R.REC SW METAL SW F.REC SW PACK SW HIGH SW + SOL SENSOR OUT
1 2 3 4 5
1 2 3 4 5 6 7
MTR
SOL
+5V SENSOR PLAY SW + MTR
- COM MTR SPEED A MTR SPEED B
8 9 10 11 12 13
B A +
MTR
-
MECHA CHASSIS
Page 12
K-501A
A
PRINTED CIRCUT BO ARD VIEW 1
1
2
3
4
5
Main circuit PC board
U1
NAAF-7383
J111
C404
C413
C415
R409
BCD
E853
C406
C410
Q403
C412
J121
J103
C402
P706A
C408
L402
J114
R116
P903A
J1001
UJJ
L402
J107
R115
J130
27
J153
7
J152
J1002
UDT
C111
J127
J128
C220
J131
25
C218
J1003
UGT
R413
J154
J135
22
C282
J1004
UPP
Q401
Q401
J106
R410
C109
C110
C112
P.B.LRVEL
J129
J137
17
C224
C212
J151
C421
J115
C247
J125
7
C243
C222
C206
C210
C422
C414
C243
J136
7
Q205
J102
L401
L401
Q102
J119 J120
C237
C236
C235
C204
C105
C106
C208
C281
J124
C216
C214
C401
C407
J133
15
17
J150
C411
C419
J145
C403
R117
J132 C234
J147
C409
C107
C113
C113
C108
C114
L204
L204
C230
C242
Q206
C405
C416
C417
C418
C101 C102
J126
1
25137383A
27
27
C226
C228
P204
P204
J101
7
C427
J105
Q404
Q405
J108
C103
J110 J113
12
Q101
12
C104
J112
20
J117
20
J118
22
J122
22
J123
J134
C219
NCAF-7383
20
J139
J140
J141
J142
C225
C227
J146
J143
J144
C241
20
20
J104
P205
C213
C420
7
C223
C238
L403
L403
P401
L405
C233
L203
L203
C229
J109
P101
L406
C246
L405
J116
C215
C209
C203
E855
L406
C231
C232
E851
C217
C221
RL
C207
C211
C205
Component side from soldering side
Page 13
K-501A
A
PRINTED CIRCUIT BO ARD VIEW 2
1
Main circuit PC board
2
3
U1
NAAF-7383
Soldering side
R404
R508 R509 R237 R238
R510 R511 R239
R512 R240
R241
R247
R248
R249
R250
R251
BCD
R405
R408 R406 R407
R513
R411
R257 R258
R259
R260 R261
R412
Q402
Q104
R516
Q103
R517
R274 R518 R519
R230 R231 R232 R233
R276 R275
R502
R119
R120
R402
R113
R114
R401
R504
R503
D202
D201
R265
R111
R112
Q207
R281
C240
R107
R108
C239
R266
R118
C250 R228
C249
R264
R227
R229
R403
R105
R106
R224
R225
R226
R501
R110
R507
R414
R109
R417
R101
R104
R415
R234
R235 R236
R103
R102
R505 R506
R242 R243
R244
R245 R246
R416
40
4160
Q201
61
21
R252 R253
R254
R255 R256
80
R418
C423
C425
C426
C424
R273
R223
R279
R271
Q209
R282
R207
R515R514
R262 R263
20
R209
R520
LR
R205
1
Q201
4
R210
R208
R280
R204
C283
R283
5
R221 R284 R285
R278
Q210
C248
R269
D203
R206
R272
R202
Q203
R219
R216
R218
R222
R220
Q204
R211
R212
R270
R268
R214
R213
R267
R215
R217
R201
R203
Page 14
K-501A
A
PRINTED CIRCUIT BO ARD VIEW 3
1
2
3
U2
F901A F901B
T2AL250V
F901
P701
P701
J936
BCD
Power supply PC board
P902
P902
J903
15
E854
AC-GAC-H
P901
P903
AC-G
AC-H
Q903 Q901
7
J934
J935
GND
C907 C907
GND
J914
J906
7
C909
R909
C909
J926
Q707
C705
NAPS-7384
T901
C914
J938
J913
Q705
Q905
ROT_S
J919
Q706
7
J920
J925
X701
J927
J931
J932
T901
CLK
C915
17
20
J904
J922
DI
7
20
7
J921
DO
J933
E852
C901
R902
R901
C905
C905
J905
7
7
J937
SPEED
R716
J923
J924
J918
20
20
20
STB
CS
J929
J930
P703
J909
P702
D901
D902
J911
J912
NCPS-7384
25137384
1
C701
5V
S717
P706
J908
C903
2
J907
FT
J901
C904
J902
C916
P705
J915 J916
J917
J928
2
EJECT
S806
7
S807
2
S809
F_PLAY
S810
R_PLAY
S811
STOP
P705A
FF
J705
REW
2
2
2
20
20
J701
2
J702
S808
D810
D803
D801D802
2
S805 REC ALBUMFADE
J703
U3
Display circuit PC board
D804
22
S812 S813
J704
D805
NADIS-7385
D808
A_SPACE REV_MODE DOLBY
NCDIS-7385
25137385
0
4
5
Component side from soldering side
Component side from soldering side
D807
D809
222
S802S803S804
2
S801
STBY
D806
Page 15
K-501A
A
PRINTED CIRCUIT BOARD VIEW 4
U2
1
2
C918
3
R744
D708
R722
R817
4
BCD
Power supply PC board
R750
R751
R717
R718
R720
D702
NAPS-7384
R713
R714
Q712
R715
D701
R705
Q713
R707
R737
C709
R572
R721
D703
L702
L701
Q708
Q703
R571
Q702
C710
R706
R708
C704
R709
R712
20
Q704
R573
8
1
R727
C703
C702
R726
C917
R917
D910
Q710
R704
R703
R736
R702
R732
Q701
R746 R745
R731
R735
Q701
33 51
R734 R733
Soldering side
R915
D706
D909
R916
Q711
R725
R801 R802 R803 R804
119
64
R728
R729
52
R730
R723
R724
C711
R914
D908
R806
U3
Display circuit PC board
R805 R812
R823
R809
R811
R810
R818
R819
5
R820
R821
R808
R807
R822
NADIS-7385
R814R815R816
Soldering side
R813
Page 16
PARTS LIST
CIRCUIT PARTS 1
REF. NO. PART NO. DESCRIPTION
ICs
Q101 22240147 Q102 222905 Q201 22241144R3HI Q401 222959 Q701 22241751R3 Q702 22241609R2 Q707 22240239 Q901,Q903 222780125NEC or
222780125JRC
Q905 222780055
MPC1330HA MPC1228HA HA12169FB MPC1297CA TMP87CH14F-3JJ5 BR93LC46F-WE2 TA7291S MPC78M12HF NJM78M12FA 78M05HF
Transistors
Q103,Q104 2216680R2 Q203,Q204 2216360R2 Q708,Q711 2216480R2 Q205,Q206 2211705 or
2211706 Q207,Q402 2216260R2 Q704,Q710 2216470R2
RN1411 RN2407 DTA114YKA 2SD655-E 2SD655-F RN1407 DTC114YKA
Q712,Q713 Q209,Q210 2216670R2 Q403 2211504 Q404,Q405 2201883 Q703 2214640R2 Q705,Q706 2212853 or
2212855
DTC114TKA 2SA950-Y 2SC1213-C 2SA1037K 2SB1068-K 2SB1068-U
Diodes
D901,D902 22380035 or
22380260 D201,D202 223234R2 or
223269R2 D701,D703 223234R2 or
223269R2 D706,D908 223234R2 or
223269R2 D909 223234R2 or
223269R2 D203 224550470R2 D702 224550750R2 D708,D910 224550560R2
GP104003E RL1N4003 1SS352 1SS355 1SS352 1SS355 1SS352 1SS355 1SS352 1SS355 UDZS4.7B UDZS7.5B UDZS5.6B
LEDs
D801,D802 225390 D803 225322 D804,D805 225324D D806 225404 D807-D810 225390
SEL2910A-TP6 SEL6210S SEL6910A-D SEL2210R TP6 SEL2910A-TP6
K-501A
Note <PP>...Europian model only <DT>...120V model only <GT>...220-230V model only
THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE ONLY WITH PART NUMBER SPECIFIED.
Page 17
PARTS LIST
CIRCUIT PARTS 2
REF. NO. PART NO. DESCRIPTION
Coils
L401,L402 231127 L405,L406 231085 L203,L204 233407 L403 231215 L701 230955R2
NCH-4183 NCH-2133 NMC-6079 NLO-2059 BK1608HS102-T
Oscillator
X701 3010341
CSTLS8M00G56
Capacitors
C243,C907 354741029
1000uF,16V,Elect
C909 C107,C108 354741019
100uF,16V,Elect
C413,C705 C915 C109,C110 354741009
10uF,16V,Elect
C221-C226 C229-C232 C241,C242 C422,C916 C114 C113 354744719 C414,C419 354744709 C215,C216 354780109
470uF,16V,Elect 47uF,16V,Elect 1uF,50V,Elect
C219,C220 C227,C228 C238,C281 C217,C218 354780229
2.2uF,50V,Elect
C701 C233-C237 354780479 C415 354722219 C101,C102 374726814 C105,C106 374728224 C111,C112 374721834 C203-C208 374722224 C209-C214 374721044 C247 374723944 C901,C903 374721044
4.7uF,50V,Elect 220uF,6.3V,Elect ECQ-B50V-681J ECQ-B50V-822J ECQ-B50V-183J ECQ-B50V-222J ECQ-V50V-104J ECQ-V50V-394J ECQ-V50V-104J
C904 C409,C410 370131014 C411,C412 370131214 C420 370131234 C103,C104 391980227 C905 391963327
APS100V-101J APS100V-121J APS100V-123J
2.2uF,50V,Elect 3300uF,35V,Elect
K-501A
Note <PP>...Europian model only <DT>...120V model only <GT>...220-230V model only
THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE ONLY WITH PART NUMBER SPECIFIED.
Page 18
PARTS LIST
CIRCUIT PARTS 3
REF. NO. PART NO. DESCRIPTION
R117,R409 443521214 R410 443524704 R413 443521004 R115,R116 5210296 R716 5210261
120ohm +/-5% 1/2W,Metal oxide 47ohm +/-5% 1/2W,Metal oxide 10ohm +/-5% 1/2W,Metal oxide N06HR47KBE,Trimming N06HR5KBC,Trimming
Switches
S717 25035699
NPS-111-S662
S801-S813
Heat sink
Q901A 27160391
HEAT SINK
Fuse holders
F901A,F901B 25052133
NSCT-1P2031 <GT,PP>
Jacks
P204 25045305 P701 25045330
NPJ-4PDBL164 NPJ-2PDBL184
Plugs
P101 25055136 P205 25055689 P401 25055132 P702 25055157 P703 25055149 P705 25055158 P706 25055709 P901 25055675 P903 25055704
NPLG-6P120 NPLG-2P645 NPLG-2P116 NPLG-13P141 NPLG-5P133 NPLG-14P142 NPLG-13P665 NPLG-2P631 NPLG-8P660
Sockets
P706A 25051238 P902 25051990
25051637
25051637 P903A 25051233 P705A 2002E392825
NSCT-13P1028 NSCT-2P1777 <DT> NSCT-2P1424 <GT> NSCT-2P1424<PP> NSCT-8P1023 NSAS-28P1000
Holder
E852 27190608-1
(CRAMP) UA-0 V0
Retainer
E854 27141059
Clamp
E851 260224
CP-1S
Screws
Q901A,Q903B 82143010
3P+10FN(BC),Pan head screw
K-501A
Note <PP>...Europian model only <DT>...120V model only <GT>...220-230V model only
THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE ONLY WITH PART NUMBER SPECIFIED.
Page 19
IC BLOCK DIAGRAM 1
Q201:Dolby IC (HA12169FB)
(L)
TP
PB OUT
60 59 5758 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
V REF
(L)
NRIN(L)
IAOUT(L)
BIAS
RPI(L)
VR3(L)
VR2(L)
CONT(L)
VR1(L)
GND
VR1(R)
CONT(R)
VR2(R)
VR3(R)
RP1(R)
REF(R)
IAOUT(R)
NRIN(R)
VREF(R)
61
62
63
64
65
66 67
68
69
70
71
72
73
74
75
76
77
78
79
80
1234567891011121314151617181920
PB OUT
TP(R)
SS1(L)
DA
DA
SS1(R)
SS2(L)
6BIT DAC
6BIT DAC
SS2(R)
E.VOL
E.VOL
CCR(R)
CCR(L)
HLS DET(R)
(L)
(L)
LLS DET
HLS DET
Dolby B/C NR
Dolby B/C NR
LLS DET (R)
(L)
LM IN(L)
REC OUT
REC OUT (R)
LM IN(R)
LM DET(L)
LM OUT(L)
RECT
LMA
LMA
RECT
LM DET(R)
EQ IN(L)
EQ
VOL
REQ
DAC
DAC
REQ
EQ
VOL
EQ CONT(R)
EQ IN (R)
D-GND
EQ CONT(L)
IREF
NR
EQ OUT(L)
ON/OFF
SW
6BIT DAC
6BIT DAC
EQ OUT(R)
NN
C/B
NC
MPX
RESET
LL
Logic
EQ-Controller
NM
HN
HC
STB
DATA
40
CLK
39
38
IN J
37
BIAS ADJ(C)
36
BIAS ADJ(M)
35
BIAS ADJ(N)
34
GND
33
BIAS CONT(L)
32
DAC OUT(L)
31
VCC
30
29
DAC OUT(R)
BIAS CONT(R)
28
FM
27
fQ
26
f/Q
25
GH
24
GL
23
GP
22
HM
21
K-501A
(R)LM OUT
Q101:Recording amplifier IC(MPC1297CA)
VCC VR2 VIN(R)2 PH2 CIN2 COUT2 VOUT21VOUT22 VIN
SIGNAL
INPUT
POWER SUPPLY
PROTE
CTION
SIGNAL
INPUT
123456789
VS1 VR1 VIN(R)1 PH1 CIN1 COUT1 VOUT11 VOUT12 GND
PEAK
HOLD
PEAK
HOLD
COMPARATER
COMPARATER
VCA OUT
VCA OUT
101112131415161718
PRE
DRIVER
Page 20
IC BLOCK DIAGRAM 2
Q707 : TA7291S(Motor drive)
K-501A
Vcc
IN 1 IN 2
Vref
2
8
6
REG
PROTECT
1
9
GND
INPUT OUTPUT
OPERATION IN 1 IN 2 OUT 1 OUT 2
STOP 0 0
FORWARD 1 0 H L
REVERSE 0 1 L H
BRAKE11LL
7
OUT 1
M
VS
35
OUT 2
Page 21
MICROPROCESSOR CONNECTION DIAGRAM
Q701:TMP87CH14F
FADE
ALBUM
STOP
F.PLAY
R.PLAY
REW
FF
EJECT
REC/PAU
AUTO SPACE
REV. MODE
DOLBY NR
10K 3.9K 1.8K 1K 820 470 390
1K 820 470 390
STANDBY
K-501A
Q601 TRAY MOTOR DRIVER
Q711 POWER FAILURE DET.
+5V
FT 1
FT 2
Q702
BR93LC46F-WE2
+5V
64636261605958575655545352
G10
DOL B
1
TAPE IN
2
R.PLY1
3
R.PLY2
4
F.PLY1
5
F.PLY2
6 7
N1
NC (+5V)
8
N2
NC (+5V)
9
N3
NC (+5V)
10
N4
NC (+5V)
11
N5
NC (+5V)
12
NC (+5V)
N6
13
NC(GND)
N70
14
DOOR LOCK OPEN
15
P-OFF
16
R.REC
17
MTL SW
18
F.REC
19
NCB
CLKDIDOCSSTB 20212223242526272829303132
G11
G12
VDD
G13
G14
G15
VAREF
BIAS CONT
DOOR CLOSE
DOOR OPEN
TEST
VSS
XIN
X701
8MHz
Q201
VASS
NC
K2
LM(R) LM(L)
R/P 70/120 LINEMUTE OSCOUT 400Hz/12kHz DOLBYRESET RECMUTE OPENSW CLOSESW RIOUT RIIN
SOL CAP
XOUT
RESET
CASS IN
K1
FT
ROI.SEN
PLAY
HIGH SW
51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
11.5V
PLAY SW MECHA
L401
Q101
47K
L402
Q401
TRAY OPEN
DET SWITCH DET SWITCH
220K
5V
5V
11.5V
Q102
Q203.Q204 Q205.Q206
TRAY CLOSE
11.5V
SYSTEM BU
ROT SENSOR
Q707 TA7291S
MOTOR DRIVE
S
R-REC SW
MECHA
METAL POSITION SW
MECHA
F-REC SW
MECHA
Q201 HA12169FB DOLBY DECODER
Q710
SYSTEM RESET
CASSETTE IN SW MECHA
HIGH POSITION SW MECHA
CAPSTAN­MOTOR
MECHA
SOLENOID MECHA
K-501A
Page 22
MICROPROCESSOR TERMINAL DESCRIPTIONS
Pin NO. Terminal I/O DESCRIPTION
1 DOLBYBLED O Dolby B indicator control output pin 2 TAPEINLED O Cassette tape detection indaictor control output pin 3 REVLED1 O Reverse direction indicator control output pin 4 REVLED2 O Reverse direction indicator control output pin 5 FWDLED1 O Forward direction indicator cont r o l out put pin 6 FWDLED2 O Forward direction indicator cont r o l out put pin 7 NOT USED Not used. 8 NOT USED Not used.
9 NOT USED Not used. 10 NOT USED Not used. 11 NOT USED Not used. 12 NOT USED Not used. 13 MODEL MODE I Model judgement input pin 14 DCHECK I Load detection input pin when a door closes. 15 POFF I Power failure detection input pin 16 PRECINHSW I Prohibition against reversal recording input pin 17 METALSW I Metal switch detection input pin 18 FRECINHSW I Prohibition against foward recording input pin 19 VKK Not used. 20 CLOCK I Control for EEPROM 21 SIN I Data input for EEPROM 22 SOUT I Data output for EEPROM 23 CS O Chip select for EEPROM 24 STB O Standby port 25 TEST Connect to GND 26 VSS Connect to GND 27 XIN Clock OSC(8MHz) 28 XOUT Clock OSC(8MHz) 29 RESET I System reset 30 PACKSW I Cassette detect switch 31 HIGHSW I High switch detect 32 PLAYSW I Play switch detect 33 CAPSTAN O Capstan control 34 SOLENOID O Solenoid control 35 OPEN O Door control 36 CLOSE O Door control 37 RSENSOR I Rot at e sensor 38 RIIN I System code input pin 39 RIOUT O System code output pin 40 CLOSESW I Door close detect 41 OPENSW I Door open detect 42 RECMUTE O Recording mute control 43 DOLBYRESET O Dolby IC reset 44 400Hz/12kHz O Switched 400Hz/12kHz 45 OSCOUT O OSC output 400Hz/12kHz 46 LINEMUTE O Line mute control 47 70/120 O Tepe select port 48 REC/PB O Mode select port 49 BIAS O Bias select 50 LEVELLCH I A/D Control for input level(Lch) 51 LEVELRCH I A/D Control for input level( Rch) 52 KEYIN4 I A/D Control 53 KEYIN3 I A/D Control 54 KEYIN2 I A/D Control 55 KEYIN1 I A/D Control 56 VASS Ref. Voltage for A/D compareter + 5V 57 VAREF Ref. Voltage for A/D compareter G ND 58 VDD +5V 59 RECLED O REC indicator control output pin 60 FADELED O FADE indicator control output pin 61 ALBUMLED O ALBUM indicator control output pin 62 STBYLED O STANBY/ON indicator control output pin 63 DOLBYCLED O Dolby C indicator control output pin 64 REVERSELED O Reverse mode LED indicator control output pin
K-501A
Page 23
ADJUSTMENT PROCEDURES
PRECAUTIONS TEST EQUIPMENT/TOOL REQUIRED
1. Before adjustment, clean the following parts Audio Oscillator with an alcohol moistened swab. Digital frequency counter *recording/playback head *erase head Oscilloscope *pinch roller *capstan Attenuator
2. Do not use magnetized screwdriver for AC voltmeter adjustment. Non-magnetic screwdriver
3. Demagnetize recording/playback head with Test tapes a head demagnetizer. TCC-153 :10kHz, -10dB
MTT-111N :3kHz,-10dB MTT-150 :Dolby level calibration
400Hz, tone 200nWb/m
K-501A
1
speed
2
azimuth
Playback
3
4
frequency
Auto Rec, level
5
adjustment
Item
Tape
Head
level
Bias
Connection
of instrument
Frequency counter to
P205 or LINE
OUT
terminal.
AC voltmeter
&
oscilloscope
to P205
AC voltmeter
to P205
Frequency
counter to
lead wire of
erase head
Line output
level/freq.
Test
tape
MTT-
111N
TCC-153 PB
MTT-
150
Normal
tape
Normal
tape
Mode
PB
PB
REC
REC/PB Auto(S717)
Output
indicator
Frequency
counter
AC
voltmeter
AC
voltmeter
Frequency
counter
Adjustme
nt point
R716 3010Hz
Fig.1
R115
(L ch.)
R116
(R ch.)
L403 85kHz
Adjustment Remarks
Maximum level
& same phase
at channels L
Refer to Fig.2.
& R
300mV
Push a auto-adjust
button(S717)
Blank tapes
Normal High UD- C-90 FF/REW torque …………80 180g/cm (Use the test tape TW-2111.) Metal XS C-60 Back tension ……………2 6g/cm (Use the test tape TW-2111.)
UD- C-90 PLAY torque …………… 30 70g/cm (Use the test tape TW-2231.)
Page 24
ADJUSTMENT POINT
RL
P205
NCAF-7383 25137383A
K-501A
L403
1
P.B.LEVEL
R115
R116
PHASE CHART
0 deg. 45 deg.
90 deg.
180 deg.
AF OSC
R716
SPEED
NCPS-7384 25137384
AF Attenuator
K-501A
LINE IN
OSC
VER HOR
1
S717
VTVM
LINE OUT
VTVM
K-501A
L
R
LINE OUT
Page 25
P A CKING VIEW
K-501A
C10
C8
C9
C3
Up
C7
Front
C5
Accessories
C1
Front
C4
C2
Page 26
PARTS LIST
P A CKING VIEW
REF. NO. PART NO. DESCRIPTION
C1 C2 C3 C4 C5 C7 C8 C9
C10
29092028A 29053865 29092029 29363044 29095835 29100097-1A 2010376 2010375 29343267 29343268 29343269 29343270
Pad Carton Pad (S) EAN Label
0.515x650x550,Sheet 350x250,Polybag Cord ass'y
3.5-MINI PLUG,Cord ass'y Instruction manual E Instruction manual CT <GT,DT> Instruction manual U3GSWD <PP> Instruction manual U3FSI <PP>
K-501A
Page 27
K-501A
ONKYO CORPORATION
Sales & Product Planning Div. : 2-1, Nisshin-cho, Neyagawa-shi, OSAKA 572-8540, JAPAN Tel: 072-831-8111 Fax: 072-833-5222
ONKYO EUROPE ELECTRONICS GmbH
Industriestrasse 20, 82110 Germering, GERMANY Tel: 089-849-320 Fax: 089-849-3265 E-mail: info@onkyo.de
ONKYO CHINA LIMITED
Units 2102-2107, Metroplaza Tower I, 223 Hing Fong Road, Kwai Chung, N.T., HONG KONG Tel: 852-2429-3118 Fax: 852-2428-9039
HOMEPAG
http://www.onkyo.co.jp/
E
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