Onkyo K-501A User manual

K-501A
SAFETY-RELATED COMPONENT
WARNING!!
COMPONENTS IDENTIFIED BY MARK ON THE
SCHEMATIC DIAGRAM AND IN THE PARTS LISTARE
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
REPLACE THESE COMPONENTS WITH ONKYO
PARTS WHOSE PART NUMBERSAPPEARAS 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.
SERVICE MANUAL
SERVICE MANUAL
CASSETTETAPE DECK
MODEL K-501A
230-240V AC, 50Hz
120V AC, 60Hz
220-230V AC, 50/60Hz
UPP
UDT
UGT
Ref. No. 3718
112001
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

K-501A
SPECIFICATIONS
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)
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.
xx
CIRCUIT NO. PART NO. DESCRIPTION
F901 252074 2A-SE-EAK,Fuse <PP,GT>
SERVICE PROCEDURES
<PP>...Europian model only
<DT>...120V model only
<GT>...220-230V model only
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

K-501A
PANEL VIEW
FRONT PANEL
STANDBY / ON
STANDBY
FADEREV MODEDOLBY NR
BC
ALBUM
CD DUBBING
K
-
501 A
STEREO CASSETTE TAPE DECK
CASSETTE LOADING MECHANISM
STANDBY/ON button
STANDBY indicator
ALBUM button/ALBUM indicator
REV MODE button
FADE button/FADE indicator
/ Rec/Pause button
,
,
Rec/Pause indicator
Cassette in indicator
Eject button
Fast-forward/Rewind Skip button
Forward/reverse side play button
Stop button
Cassette slot
Auto space button
REV MODE indicator
DOLBY NR indicator
DOLBY NR button
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

EXPLODEDVIEW
K-501A
S1 A1
A2 A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
U1
U2
U3
Z1
A2
A17
T901
P901A
P101A
P702AP702A
P703A
S1
S1
S1
S1
S1
S3
S4
S2
F901
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

K-501A
PARTS LIST
EXPLODEDVIEW
REF. NO. PART NO. DESCRIPTION
A1 27111266 Front bracket
A2 27191165 Holder (Door)
A3 28198948 Facet(IN)
A4 28148505 Door
A5 27180583 Spring
A6 28325983 Recording button ass'y
A7 27100415 Chassis
A8 27191164 Holder (Mechanism)
A9 27300750 #2271,Bushing
A10 27212366 Front panel
A11 28198939 Facet(S)
A12 28198946 Facet(PLAY)
A13 28198947 Facet(NR)
A14 28184832 Cover
A15 28140079 Cushion
A16 28141492 Cushion
A17 28141489 Cushion
A18 27122947A Rear panel <DT>
27122948A Rear panel <GT>
27122949A Rear panel <PP>
A19 260208 Binder
F901 252074 2A-SE-EAK,Fuse <PP,GT>
P101A 2009990714 NSAS-14P0999,Socket ass'y
P702A 20022392618 NSAS-26P0998,Socket ass'y
P703A 20022391010 NSAS-10P0997,Socket ass'y
P901A 253334HRK AS-CEE,Power supply cord <PP,GT>
253331HDK or AS-UC-2,Power supply cord <DT>
253330MIL AS-UC-2,Power supply cord <DT>
T901 2301571 NPT-1434D,Power Transformer <DT>
2301572 NPT-1434G,Power Transformer <GT>
2301573 NPT-1434P,Power Transformer <PP>
U1 1N283583-1B NAAF-7383-1B,Main circuit PC board <DT>
1N283583-1C NAAF-7383-1C,Main circuit PC board <GT>
1N283583-1D NAAF-7383-1D,Main circuit PC board <PP>
U2 1N283584-1B NAPS-7384-1B,Power supply PC board <DT>
1N283584-1C NAPS-7384-1C,Power supply PC board <GT>
1N283584-1D NAPS-7384-1D,Power supply PC board <PP>
U3 1N283585-1B NADIS-7385-1B,Display circuit PC board <DT>
1N283585-1C NADIS-7385-1C,Display circuit PC board <GT>
1N283585-1D NADIS-7385-1D,Display circuit PC board <PP>
Z1 244248A CMAL2Z815A,Cassette Mechanism
S1 838130088 3TTB+8B,Self tapping screw
S2 830440089 4TTC+8C(BC),Self tapping screw
S3 838930088 3TTB+8B(UN),Self tapping screw
S4 838430088 3TTB+8B(BC),Self tapping screw
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.
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

C
F REC PACK
R REC
METAL
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
PARTS LIST
K-501A
EXPLODEDVIEW
CASETTE MECHANISM
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

X
X
D801-D810
KEY CONTROL&DISPLAY
Q704
Q703
Q713
Q712
Q706
Q705
START KEY
ADJUSTMENT
AUTO
S717
ERASE HEAD
R/P HEAD
MECHA and DRIVER
R716
TAPE SPEED
Q101
LINE
OUT
IN
Q701
MICROPROCESSOR
L401,L402,L403
Q401 Q405
BIAS OSC and HX PRO
D905,D906
D901,D902
T901
and REGULATOR
POWER TRANSFORMER
Q906
-22V(for FL tube)
70/120
Q103,Q104
R115,R116
P.B.LEVEL DOLBY NR,REC EQ,METER AMP
Q201Q102
P.B.AMP.
Q905Q903
Q901 5V(for MICROPROCESSOR)
12V(for MECHA)
12V(for SIGNAL)
K-501A
BLOCK DIAGRAM
K-501A
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

A
1
2
3
4
5
BCD
K-501A
SCHEMATIC DIAGRAM 1
U1 Main circuit PC board
U2
Power supply circuit
PC board
F901B FUSE_B
F901A
FUSE_A
12V
12V
E854
22V
12V
5.6V
P903
P903A
C102
681
C101 681
Q201
HA12169FB
61
62
63
64
66
75
77
78
79
80
BIA_TRAPL1BIA_TRAPR60
CCRL5CCRR 56
CONT[L]73
CONT[R]68
DGND47
EQCONT[L]13 EQCONT[R]48 EQIN[L]12 EQIN[R] 49 EQOUT[L]15 EQOUT[R]46
GND171 GND270
HLSL6HLSR 55 IREF14 LLSL7LLSR 54 LMDET[L]10 LMDET[R]51
LMIN[L]9LMIN[R] 52 LMOUT[L]11 LMOUT[R]50
NNORM16 NR ON/OFF45
PBOUT[L]2PBOUT[R]59 RECOUT[L]8RECOUT[R]53
RPI[L]PBIN76
RPI[R]PBIN65
SS1L3SS1R 58 SS2L4SS2R 57
VRI1[L]LINEIN72
VRI1[R]LINEIN69
VRI2[L]ACCUIN74
VRI2[R]ACCUIN
67
T901
NPT-1434*
2
4
5
6
7
P901A
X
X
X
P204
54
L204
NMC-6079
123 6
54
L203
NMC-6079
123 6
L401
NCH-4183
123
46
L402
NCH-4183
123
46
L403
NLO-2059
123
45
6
Q905
78M05
G
IO
Q903
78M12
G
IO
Q901
78M12
G
IO
P706A
P706
P902
P901 P401
P
Q101 MPC1330HA
1 2 3 4 5 6 7 8 9
P
P101
Q204
DTA114YS
Q203
DTA114YS
Q711
DTA114YS
D203
UDZS4.7B
D910
UDZS5.6B
D902
GP1N4003
D901
GP1N4003
D908
1SS352
D909
1SS352
D706
1SS352
Q403
2SA950
Q205
2SD655
Q206
2SD655
Q404
2SC1213C
Q405
2SC1213C
R410 47
Q710
DTC114YS
Q207
DTC114YS
Q402
DTC114YS
C283 223
NC
C282 223
C246
153
C248
104
C904104
C903
104 C917
104
C901
104
C702
223
C703
223
C214
104
C213
104
C212 104
C210 104 C208 222
C206
222
C204
222
C205
222
C203
222
C211 104
C209 104
C207 222
C105
822
C106
822
C427 183
C424
681
C426
680
C425 680
C423 681
C111
183
C112
183
C411
121/100
C416 472
C417 472
C420
123/100
C418
223
C404
471
C402 103
C406
273
C412
121/100
C410
101/100
C408
273
C409
101/100
C407
273
C405
273
C403 471
C401 103
C247
394
C421
100/500
L406
4.7MH
L405 4.7MH
Q401 MPC1297CA
1 2 3 4 5 6 7 8 910
11 12 13 14 15 16 17
18
R116
47KB
R115
47KB
Q103
DTC114TS
Q104
DTC114TS
Q102MPC1228HA
1 2 3 4 5 6 7 8
R202 22K
R267
1K
R269 6.8K
R219
1.8K
R285 4.7K
R284 4.7K
R283 4.7K
R221 4.7K
R118 1K
R117 120(1/2W)
R917 10K
R916
560
R914
470
R915
470
R726
3.9K
R281
1K
R274 390K
R223
12K
R273
12K
R279
12K
R209 10K
R271 100K
R210
10K R272 100K
R208
1K
R206
6.8K
R207
1K R205 6.8K
R204 560R203 560
R201 22K
R268 1K
R211 68K
R212 68K
R216 3.3K
R218
6.8K
R215 3.3K
R217
6.8K
R213
2.2K
R214
2.2K
R222
18K
R220
1.8K
R270 6.8K
R278
10K
R725
330K
R110
120 R109
120
R119 1.5K
R120
1.5K
R102
100K
R104
470
R108
15K
R107
15K
R105
390K
R106
390K
R111
1.5K
R112
1.5K
R103
470
R409
120
(1/2W)
R406
3.3K
R413
10
R113 3.9K
R114
3.9K
R41439K
R415
39K
R418
39K
R101100K
R275
1K
R276
330K
R412
5.6K
R411 39K
R417 4.7
R416 4.7
R405
3.3K
R407
22K
R408
22K
R403
330K
R401
100K
R402
100K
R404
330K
C114
10/16
C113
470/16
C915
100/16
C909
1000/16
C907
1000/16
C905
4700/25
C916
10/16
C281 1/50
C233
4.7/50
C223 10/16 C221 10/16
C219 1/50
C235 4.7/50
C224 10/16
C222
10/16
C220 1/50
C218 2.2/50
C216
1/50
C217
2.2/50
C215
1/50
C241
10/16
C242 10/16
C230 10/16
C229 10/16
C225 10/16
C226 10/16
C231 10/16
C232 10/16
C227 1/50
C228 1/50
C238 1/50
C243 1000/16
C701
2.2/50
C104
2.2/50
C107
100/16
C108
100/16
C109
10/16
C110
10/16
C103
2.2/50
C415
220/6.3
C419
47/16
C414
47/16
C422
10/16
C413
100/16
OSC
DAC_L
DAC_R
LEVEL_R
REC_R
STB
REC_MUTE
CLK
OSC_OUT
DO
LEVEL_L
REC_R
REC_L
RESET
REC_L
DAC_R
DAC_L
70/120
BIAS_CONT R/P
GND3
PING
MUT
12V1 12V2 12V3
GND2
+12VSIG
AC1 AC1
AC0
AC2 AC2
DC1
AC0
DC1
GND
AC-G
AC-H
2
70/120
R/P
13
12
11
10
9
8
7
6
5
4
3
1
LINE MUTE
5.6
R/P
P.B.LEVEL
INPUT(R)
INPUT(L)
OUTPUT(R)
OUTPUT(L)
R ch L ch
8.9
400/12K
70/120
P.B.LEVEL
REC L REC R
70/120
BIAS ON/OFF
(1/2W)
(1/2W)
FUSE A FUSE B
F901
2A/250V
*
NPT-1434D<DT>
NPT-1434G<GT>
NPT-1434P<PP>
NAPS-7384
NAAF-7383
NC: No used
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

A
1
2
3
4
5
BCD
K-501A
SCHEMATIC DIAGRAM 2
U2
Power
supply
circuit
PC board
U1 Main circuit PC board
U3 Display circuit
PC board
BYMARK ARECRITICAL FOR SAFETY
IDENTIFIED
NOTE
THECOMPONENTS
REPLACEONLYWITH PARTNUMBERSPECIFIED.
.
.VOLTAGE(MEASUREDWITHVOLTMETER) IS DC VOLTAGE.(NO INPUT SIGNAL)
.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
u
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.
.
.
TO 2SA1015-GR UNLESS OTHERWISE NOTED.
NC:Noused
TO MECHANISM
TO MECHANISM
NADIS-7385
5V
12V
5V
5V
12V
12V
5V
P705A
P705
Q201
H
A12169FB
19 20
21
BIASADJ[H] 37
BIASADJ[M] 36
BIASADJ[N] 35
BIASCONT[L] 28
BIASCONT[R]33
C/B 44
CLK 39
DACOUT[L]29
DACOUT[R]32
DATA40
DGND47
EQCONT[L]13 EQCONT[R]48
EQIN[L]12 EQIN[R] 49 EQOUT[L]15 EQOUT[R]46
F/Q 25
FM 27
FQ 26
GH 24
GL 23
GND 34
GP 22
INJ 38
IREF14 LMDET[L]10 LMDET[R]51
LMIN[L]9LMIN[R] 52 LMOUT[L]11 LMOUT[R]50
MPX43
N.HIGH17 N.MTL18 N.NORM16 NR_ON/OFF45
RST42 STB41
VCC1 30
VCC2 31
LED
Q701
TMP87CH14F
400/12K 44
70/120 47
ALBUM61
BIAS_CONT49
CAP 33
CASS_IN30
CLK20
CLOSE_SW40
CS23
DI21 DO22
DOL_B1
DOL_C63
DOL_RST43
DOOR_CLOSE36
DOOR_LOCK_OPEN14
DOOR_OPEN35
F.PLY15F.PLY26
F.REC18
FADE60
FT52
HIGH_SW31 KEY153
KEY254
KEY3[NC]55
LINE_MUTE46
LM[L] 50
LM[R] 51
MTL_SW17
NC17NC28NC39NC410 NC511 NC612 NC713
NC819
OPEN_SW41
OSC_OUT45
P-OFF15
PLAY
32
R.PLY13R.PLY24
R.REC16
R/P 48
REC59
REC_MUTE42
RESET29
REV.M
64
RI_IN 38
RI_OUT39
ROT.SEN.37
SOL 34
STB24
STBY62
TAPE_IN2
TEST[VSS]25
VAREF57
VASS56
VDD58VSS26
XIN27
XOUT
28
P706A
P706
P702
1
P701
2
3
Q702
BR93LC46F-WE2
12
34
5678
X701
CST8.00MG
D803 SEL6910D
D805 SEL6910D
D806 SLV332VR
D807 SLV332VR
D808 SEL6910D
D809 SEL6910D
D810 SEL6910D
D804 SEL6910D
D801 SEL6910D
D802 SEL6910D
S717
S810
S813
S812
S811
S809
S808
S807
S806
S805
S804
S803
S802
S801
P205
Q707 TA7291S
1
2
3
4
5
6
7
8
9
Q708
DTA114YS
Y
S
D702
UDZS7.5B
D708
UDZS5.6B
P703
D201
1SS352
D701
1SS352
D703
1SS352
D202 1SS352
Q706
2SB1068
Q705
2SB1068
Q703
2SA933
R801 820
R802 470
R803 820
R804 470
R807 470
R808 270
R809 270
R810 470
R811 470
R812 470
R805 470
R806 470
Q713
DTC114YS
Q712
DTC114YS
Q704
DTC114YS
C711
223
C710
223
C239
104
C249
223
C250
223
0
3
3
C918
223
C240
104
C709 104
C704
223
L702
1MH
NC
L701
1MH
R716
5KB
Q209
DTC114TS
Q210
DTC114TS
R255 2.2M
NC
R254 56K
R257 2.2M
NC
R256 68K
R258
82K
R259
33K
R261 2.2M
NC
R260 68K
R263 2.2M
NC
R262 390K
R245 2.2M
NC
R234
2.2MNC
R235 47K
R244 56K
R225
100K
R246 680K
R247 68K
R237 100K
R236 100K
R248
68K
R238
33K
R249
39K
R239
33K
R2512.2M
NC
R240 2.2M
NC
R241 82K
R250 82K
R243 2.2M
NC
R253 390K
NC
R252 390K
R242 100K
R737
10K
R751
100K
R227
10K
R282
1M
R223
12K
R273
12K
R279
12K
R209 10K
R271 100K
R232 10K
R233 10K
R280
1M
R210
10K R272 100K
1K
6
.
8K
R207
1K
R
205 6.8
K
R746
3.9K
R745
3.9K
R717 47K
R718 3.9K
R750
100K
R720
1.8K
R715
12K
R721
47K
R722 390K
R744
470
R734
2.7K R733 2.7K R732 2.7K R731 2.7K R704
3.9K R703 3.9K R702
3.9K
R736 3.3K
R735 10K
R723 2.7K R728 2.7K R729 2.7K R730 2.7K
R724
390
R822 3.9K
R823
10K
R821
1.8K
R817
390
R818
470
R819
820
R820
1K
R816
1K
R815
820
R814
470
R813
390
R230
10K
R228
10K
R265
47K
R266 56K R264
47K
R231
10K
R226 100K
R714
47K
R713 3.9K
R709
22K
R708
10K
R727
3.9K
R705
3.9K
R224
12K
R712 1M
R707
3.9K
R706
3.9K
R229 3.3K
C705
100/16
C233
4.7/50
C223 10/16 C221 10/16
C219 1/50
C237 4.7/50
C236 4.7/50
C235 4.7/50
C224 10/16
C222
10/16
C220 1/50
1/501/50
C234
4.7/50
GND4
LEVEL_R
LEVEL_L
2
ALBUM
REV.MODE
DOLBY C
STANDBY
FADE
REC
F.PLAY
R.PLAY
TAPE IN
DOLBY B
GND
LOAD IN SW
LOAD OUT SW
LOAD IN
LOAD OUT
MTR SPEED A
MTR SPEED B
GND
MTR
PLAY SW
5V
ROT SEN
R.REC SW
MTL SW
F.REC SW
SOL
HIGH SW
CASS IN SW
13
12
11
10
9
8
7
6
5
4
3
1
REW
FF
FADE
STOP
F.PLAY
R.PLAY
EJECT
REC/PAU
AUTO SPACE
ALBUM
#1,#8 NC
TAPE SPEED ADJ.
SOL
TEST POINT
LCHRCH
FT-1
FT-2
STBY
DOLBY NR
REV.MODE
CAP
RI RI
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

F901B FUSE_B
F901A
FUSE_A
5V
12V
12V
12V
5V
5V
12V
E854
22V
12V
5.6V 12V
5V
P903
P903A
P705A
P705
C102
681
C101 681
Q201
HA12169FB
19 20
21
61
62
63
64
66
75
77
78
79
80
BIASADJ[H] 37
BIASADJ[M] 36
BIASADJ[N] 35
BIASCONT[L] 28
BIASCONT[R]33
BIA_TRAPL1BIA_TRAPR60
C/B 44
CCRL5CCRR 56
CLK 39
CONT[L]73
CONT[R]68
DACOUT[L]29
DACOUT[R]32
DATA40
DGND47
EQCONT[L]13 EQCONT[R]48
EQIN[L]12 EQIN[R] 49
EQOUT[L]15 EQOUT[R]46
F/Q 25
FM 27
FQ 26
GH 24
GL 23
GND 34
GND171 GND270
GP 22
HLSL6HLSR 55
INJ 38
IREF14 LLSL7LLSR 54 LMDET[L]10 LMDET[R]51
LMIN[L]9LMIN[R] 52 LMOUT[L]11 LMOUT[R]50
MPX43
N.HIGH17 N.MTL18 N.NORM16 NR_ON/OFF45
PBOUT[L]2PBOUT[R]59 RECOUT[L]8RECOUT[R]53
RPI[L]PBIN76
RPI[R]PBIN65
RST42
SS1L3SS1R 58 SS2L4SS2R 57
STB41
VCC1 30
VCC2 31
VRI1[L]LINEIN72
VRI1[R]LINEIN69
VRI2[L]ACCUIN74
VRI2[R]ACCUIN
67
LED
Q701
TMP87CH14F
400/12K 44
70/120 47
ALBUM61
BIAS_CONT49
CAP 33
CASS_IN30
CLK20
CLOSE_SW40
CS23
DI21 DO22
DOL_B1
DOL_C63
DOL_RST43
DOOR_CLOSE36
DOOR_LOCK_OPEN14
DOOR_OPEN35
F.PLY15F.PLY26
F.REC18
FADE60
FT52
HIGH_SW31 KEY153
KEY254
KEY3[NC]55
LINE_MUTE46
LM[L] 50
LM[R] 51
MTL_SW17
NC17NC28NC39NC410 NC511 NC612 NC713
NC819
OPEN_SW41
OSC_OUT45
P-OFF15
PLAY
32
R.PLY13R.PLY24
R.REC16
R/P 48
REC59
REC_MUTE42
RESET29
REV.M
64
RI_IN 38
RI_OUT39
ROT.SEN.37
SOL 34
STB24
STBY62
TAPE_IN2
TEST[VSS]25
VAREF57
VASS56
VDD58VSS26
XIN27
XOUT
28
T901
NPT-1434*
2
4
5
6
7
P901A
X
X
X
P204
54
L204
NMC-6079
123 6
54
L203
NMC-6079
123 6
L401
NCH-4183
123
46
L402
NCH-4183
123
46
L403
NLO-2059
123
45
6
Q905
78M05
G
IO
Q903
78M12
G
IO
Q901
78M12
G
IO
P706A
P706
P702
1
P701
2
3
Q702
BR93LC46F-WE2
12
34
5678
X701
CST8.00MG
P902
D803 SEL6910D
D805 SEL6910D
D806 SLV332VR
D807 SLV332VR
D808 SEL6910D
D809 SEL6910D
D810 SEL6910D
D804 SEL6910D
D801 SEL6910D
D802 SEL6910D
S717
S810
S813
S812
S811
S809
S808
S807
S806
S805
S804
S803
S802
S801
P901 P401
P205
Q101 MPC1330HA
1 2 3 4 5 6 7 8 9
Q707 TA7291S
1
2
3
4
5
6
7
8
9
P101
Q204
DTA114YS
Q203
DTA114YS
Q708
DTA114YS
Q711
DTA114YS
D203
UDZS4.7B
D910
UDZS5.6B
D702
UDZS7.5B
D708
UDZS5.6B
P703
D902
GP1N4003
D901
GP1N4003
D908
1SS352
D909
1SS352
D706
1SS352
D201
1SS352
D701
1SS352
D703
1SS352
D202 1SS352
Q706
2SB1068
Q705
2SB1068
Q703
2SA933
Q403
2SA950
Q205
2SD655
Q206
2SD655
Q404
2SC1213C
Q405
2SC1213C
R801 820
R802 470
R803 820
R804 470
R807 470
R808 270
R809 270
R810 470
R811 470
R812 470
R805 470
R806 470
R410 47
Q710
DTC114YS
Q713
DTC114YS
Q207
DTC114YS
Q712
DTC114YS
Q704
DTC114YS
Q402
DTC114YS
C711
223
C710
223
C283 223
NC
C282 223
C239
104
C246
153
C249
223
C250
223
C248
104
C904104
C903
104 C917
104
C901
104
C702
223
C703
223
C214
104
C213
104
C212 104
C210 104 C208 222
C206
222
C204
222
C205
222
C203
222
C211 104
C209 104
C207 222
C918
223
C105
822
C106
822
C427 183
C240
104
C424
681
C426
680
C425 680
C423 681
C111
183
C112
183
C411
121/100
C416 472
C417 472
C709 104
C420
123/100
C418
223
C404
471
C402 103
C406
273
C412
121/100
C410
101/100
C408
273
C409
101/100
C407
273
C405
273
C403 471
C401 103
C247
394
C421
100/500
C704
223
L702
1MH
NC
L701
1MH
L406
4.7MH
L405 4.7MH
Q401 MPC1297CA
1 2 3 4 5 6 7 8 910
11 12 13 14 15 16 17
18
R716
5KB
R116
47KB
R115
47KB
Q209
DTC114TS
Q210
DTC114TS
Q103
DTC114TS
Q104
DTC114TS
Q102MPC1228HA
1 2 3 4 5 6 7 8
R255 2.2M
NC
R254 56K
R257 2.2M
NC
R256 68K
R258
82K
R259
33K
R261 2.2M
NC
R260 68K
R263 2.2M
NC
R262 390K
R245 2.2M
NC
R234
2.2MNC
R235 47K
R244 56K
R225
100K
R246 680K
R247 68K
R237 100K
R236 100K
R248
68K
R238
33K
R249
39K
R239
33K
R2512.2M
NC
R240 2.2M
NC
R241 82K
R250 82K
R243 2.2M
NC
R253 390K
NC
R252 390K
R242 100K
R202 22K
R267
1K
R269 6.8K
R219
1.8K
R737
10K
R751
100K
R285 4.7K
R284 4.7K
R283 4.7K
R221 4.7K
R118 1K
R117 120(1/2W)
R917 10K
R916
560
R914
470
R915
470
R726
3.9K
R281
1K
R274 390K
R227
10K
R282
1M
R223
12K
R273
12K
R279
12K
R209 10K
R271 100K
R232 10K
R233 10K
R280
1M
R210
10K R272 100K
R208
1K
R206
6.8K
R207
1K R205 6.8K
R204 560R203 560
R201 22K
R268 1K
R211 68K
R212 68K
R216 3.3K
R218
6.8K
R215 3.3K
R217
6.8K
R213
2.2K
R214
2.2K
R222
18K
R220
1.8K
R270 6.8K
R278
10K
R746
3.9K
R745
3.9K
R717 47K
R718 3.9K
R750
100K
R720
1.8K
R715
12K
R721
47K
R722 390K
R744
470
R725
330K
R734 2.7K R733 2.7K R732 2.7K R731 2.7K R704
3.9K R703 3.9K R702
3.9K
R736 3.3K
R735 10K
R110
120 R109
120
R119 1.5K
R120
1.5K
R102
100K
R104
470
R108
15K
R107
15K
R105
390K
R106
390K
R111
1.5K
R112
1.5K
R103
470
R723 2.7K R728 2.7K R729 2.7K R730 2.7K
R724
390
R822 3.9K
R823
10K
R821
1.8K
R817
390
R818
470
R819
820
R820
1K
R816
1K
R815
820
R814
470
R813
390
R230
10K
R228
10K
R265
47K
R266 56K R264
47K
R231
10K
R226 100K
R409
120
(1/2W)
R406
3.3K
R413
10
R113 3.9K
R114
3.9K
R41439K
R415
39K
R418
39K
R714
47K
R713 3.9K
R709
22K
R708
10K
R727
3.9K
R705
3.9K
R224
12K
R101100K
R712 1M
R707
3.9K
R706
3.9K
R275
1K
R276
330K
R412
5.6K
R411 39K
R417 4.7
R416 4.7
R405
3.3K
R407
22K
R408
22K
R229 3.3K
R403
330K
R401
100K
R402
100K
R404
330K
C705
100/16
C114
10/16
C113
470/16
C915
100/16
C909
1000/16
C907
1000/16
C905
4700/25
C916
10/16
C281 1/50
C233
4.7/50
C223 10/16 C221 10/16
C219 1/50
C237 4.7/50
C236 4.7/50
C235 4.7/50
C224 10/16
C222
10/16
C220 1/50
C218 2.2/50
C216
1/50
C217
2.2/50
C215
1/50
C241
10/16
C242 10/16
C230 10/16
C229 10/16
C225 10/16
C226 10/16
C231 10/16
C232 10/16
C227 1/50
C228 1/50
C238 1/50
C243 1000/16
C701
2.2/50
C104
2.2/50
C107
100/16
C108
100/16
C109
10/16
C110
10/16
C103
2.2/50
C234
4.7/50
C415
220/6.3
C419
47/16
C414
47/16
C422
10/16
C413
100/16
GND4
OSC
DAC_L
DAC_R
LEVEL_R
REC_R
STB
REC_MUTE
CLK
OSC_OUT
DO
LEVEL_L
REC_R
REC_L
RESET
REC_L
DAC_R
DAC_L
70/120
BIAS_CONT R/P
GND3
PING
MUT
12V1 12V2 12V3
GND2
+12VSIG
AC1 AC1
AC0
AC2 AC2
DC1
AC0
DC1
GND
AC-G
AC-H
2
70/120
R/P
ALBUM
REV.MODE
DOLBY C
STANDBY
FADE
REC
F.PLAY
R.PLAY
TAPE IN
DOLBY B
GND
LOAD IN SW
LOAD OUT SW
LOAD IN
LOAD OUT
MTR SPEED A
MTR SPEED B
GND
MTR
PLAY SW
5V
ROT SEN
R.REC SW
MTL SW
F.REC SW
SOL
HIGH SW
CASS IN SW
13
12
11
10
9
8
7
6
5
4
3
1
REW
FF
FADE
STOP
F.PLAY
R.PLAY
EJECT
REC/PAU
AUTO SPACE
ALBUM
#1,#8 NC
LINE MUTE
TAPE SPEED ADJ.
SOL
TEST POINT
LCHRCH
5.6
R/P
P.B.LEVEL
INPUT(R)
INPUT(L)
OUTPUT(R)
OUTPUT(L)
R ch L ch
FT-1
FT-2
STBY
DOLBY NR
REV.MODE
8.9
400/12K
70/120
P.B.LEVEL
REC L REC R
70/120
BIAS ON/OFF
(1/2W)
(1/2W)
CAP
RI
*
NPT-1434D<DT>
NPT-1434G<GT>
NPT-1434P<PP>
NC:Noused
K-501A
SCHEMATIC DIAGRAM
A
1
2
3
4
5
BCDEFGH
U1
U2
U3
Main circuit PC board
Power supply
circuit
PC board
Display circuit
PC board
BYMARK ARECRITICAL FOR SAFETY
IDENTIFIED
NOTE
THECOMPONENTS
REPLACEONLYWITH PARTNUMBERSPECIFIED.
.
.VOLTAGE(MEASUREDWITHVOLTMETER) IS DCVOLTAGE.(NO INPUT SIGNAL)
.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
u
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.
.
.
TO 2SA1015-GR UNLESS OTHERWISE NOTED.
F901
2A/250V
NAAF-7383
NAPS-7384
NADIS-7385
TO MECHANISM
TO MECHANISM
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com