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K-501A
Ref. No. 3718 112001
SERVICE MANUAL
CASSETTE TAPE DECK MODEL K-501A
UPP UDT UGT SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ON THE
230-240V AC, 50Hz 120V AC, 60Hz 220-230V AC, 50/60Hz
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.
K-501A SPECIFICATIONS
Track format 4-tracks, 2-channels Erasing system AC erase Tape speed 4.8 cm/sec.
Wow and flutter
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 x H x 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)
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
Weight Signal to noise ratio 2.5 kg, 5.5 lbs · 54 dB (metal position tape, Dolby NR off) Specifications and external appearance are · Noise reduction of 10 dB above 5 kHz subject to change without notice as a result of and 5 dB at 1 kHz is possible with Dolby product improvement. 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
SERVICE PROCEDURES
CIRCUIT NO. F901 PART NO. 252074 DESCRIPTION 2A-SE-EAK,Fuse
...Europian model only ...120V model only ...220-230V model only
K-501A PANEL VIEW
FRONT PANEL
STANDBY/ON button STANDBY indicator
/
Rec/Pause button Rec/Pause indicator
FADE button/FADE indicator Cassette in indicator
ALBUM button/ALBUM indicator Eject button
STEREO CASSETTE TAPE DECK
CASSETTE LOADING MECHANISM
B STANDBY / ON
C CD DUBBING ALBUM FADE
DOLBY NR REV MODE
STANDBY
K- 5 01A
DOLBY NR indicator DOLBY NR button
Cassette slot
Stop button
REV MODE indicator REV MODE button
, Forward/reverse side play button
Auto space button
, Fast-forward/Rewind Skip button
K-501A EXPLODED VIEW
P901A A9 S1 P101A A16 P702A A15 A19 P703A S2 U2 T901 A17 A7 S1 U3 S1 A4 S1 S1 A1 A12 A2 A5 Z1 A6 A3 A13 A2 A14 S3 S4 A18 U1
F901
S1
A8
A17
A11
A10
K-501A PARTS LIST
EXPLODED VIEW
REF. NO. A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18
A19 F901 P101A P702A P703A P901A
T901
U1
U2
U3
Z1 S1 S2 S3 S4
PART NO. 27111266 27191165 28198948 28148505 27180583 28325983 27100415 27191164 27300750 27212366 28198939 28198946 28198947 28184832 28140079 28141492 28141489 27122947A 27122948A 27122949A 260208 252074 2009990714 20022392618 20022391010 253334HRK 253331HDK or 253330MIL 2301571 2301572 2301573 1N283583-1B 1N283583-1C 1N283583-1D 1N283584-1B 1N283584-1C 1N283584-1D 1N283585-1B 1N283585-1C 1N283585-1D 244248A 838130088 830440089 838930088 838430088
DESCRIPTION
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 Rear panel Rear panel Binder 2A-SE-EAK,Fuse NSAS-14P0999,Socket ass'y NSAS-26P0998,Socket ass'y NSAS-10P0997,Socket ass'y AS-CEE,Power supply
cord
AS-UC-2,Power supply cord AS-UC-2,Power supply cord NPT-1434D,Power Transformer NPT-1434G,Power Transformer NPT-1434P,Power Transformer NAAF-7383-1B,Main circuit PC board NAAF-7383-1C,Main circuit PC board NAAF-7383-1D,Main circuit PC board NAPS-7384-1B,Power supply PC board NAPS-7384-1C,Power supply PC board NAPS-7384-1D,Power supply PC board NADIS-7385-1B,Display circuit PC board NADIS-7385-1C,Display circuit PC board NADIS-7385-1D,Display circuit PC board 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
Note ...Europian model only ...120V model only ...220-230V model only THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE ONLY WITH PART NUMBER SPECIFIED.
K-501A EXPLODED VIEW
CASETTE MECHANISM
F REC
METAL PACK C R REC
PARTS LIST
REF.NO 1 2 3 4 5 6 7 8 9 10 PART NO. FF18WFF19YF567-626 FF26KF513-891 F514-129 F514-130 F522-064 F522-052 FD52YDESCRIPTION F/R belt Main belt Switch PC board ass'y Flywheel ass'y Recording/Play head ass'y Pinch roller R Pinch roller L Clutch Clutch Master cam
K-501A
BLOCK DIAGRAM
P.B.AMP. P.B.LEVEL R/P HEAD Q102
X
DOLBY NR,REC EQ,METER AMP
KEY CONTROL&DISPLAY D801-D810
Q201 R115,R116
Q101
70/120 Q103,Q104
IN LINE OUT BIAS OSC and HX PRO Q401 Q405
ERASE HEAD
X
MICROPROCESSOR
L401,L402,L403 Q701 S717 AUTO ADJUSTMENT START KEY Q705 Q706 Q712 TAPE SPEED R716 5V(for MICROPROCESSOR) Q905 Q713 Q703 Q704 MECHA and DRIVER
POWER TRANSFORMER and REGULATOR 12V(for SIGNAL) T901 D901,D902 Q901 12V(for MECHA) Q903
-22V(for FL tube) D905,D906 Q906
K-501A
K-501A
A B C D
SCHEMATIC DIAGRAM 1
C243 1000/16 222 104 R272 100K R221 R283 R284 OUTPUT(R) DTA114YS 4.7K C248 104 4.7K 4.7K Q206 2SD655 R220 1.8K R268 1K R285 INPUT(L) 4.7K 4.7/50 10/16 C222 10/16 EQCONT[R48 ] 10K D G N D4 7 14IREF C224 R210 E Q O U T [ R4 6 ] 15EQOUT[L] EQIN[R] 49 13EQCONT[L] 10/16 R279 C221 R273 R 2 2 31 2 K 12K 12K P706 C233 4.7/50 16N NORM NR ON/OFF5 4 C235 UDZS4.7B D203 104 INPUT(R) R270 6.8K 2.2/50 C218 C214 104
C208
C210
C212
Q204 DTA114YS
C282
C283
P204
LINE MUTE
2.2/50 R103 470 MPC1228HA R ch R101100K 8 7 6 5 C101 681 C104 2.2/50 R104 470 Q102 L ch 4 3 2 1
C216
B I A _ T R A P R6 0
RECOUT[R]53
LMDET[R]51 10LMDET[L]
SS1R 58
CCRR 56
HLSR 55
SS2R 57
LLSR 54
PBOUT[R]59
LMIN[R] 52
1 2 3
R218 6.8K 61 62 63 64
R222
18K
R216
3.3K
C232 R112 1.5K C110 10/16 R106 390K 120(1/2W) 470/16 R108 15K R107 15K C113 R105 390K C109 10/16 R111 1.5K R119 1.5K C228 R214 2.2K R213 R115 47KB C246 153 2.2K C227 R212 R211 C230 1/50 C226 68K 68K C225 1/50 C229 C231 R215
10/16 10/16 10/16
65 RPI[R]PBIN 66 67 VRI2[R]ACCUIN 68 CONT[R] 69 VRI1[R]LINEIN 70 GND2 71 GND1 72 VRI1[L]LINEIN 73 CONT[L] 74 VRI2[L]ACCUIN 75 76 RPI[L]PBIN 77 1 BIA_TRAPL 79 11LMOUT[L] 1 2 3 4 5 6 7 8 9 10 11 12 13 2 PBOUT[L] 78 80 8 RECOUT[L] Q201 HA12169FB
X
R120
C102 681 R102 100K R116 47KB
1.5K
C106 822 R114 C112 3.9K
C105 822
P.B.LEVEL R113 3.9K
P101
X
10/16 10/16 10/16 3.3K
D T C 1 1 4 T SC 1 1 1
DTC114TS 183
100/16 R117 R109 120
Q104 X P.B.LEVEL
R110 120
R/P
70/120
R217 6.8K
1/50
C215
R201 C203
22K 560 C205 222
R219 1K 1.8K Q205 2SD655
222
R205 6.8K C219
6.8K
Q101
MPC1330HA
10/16
R203
R269
C241
R118
R267 1K
10/16
R271
LEVEL_R
100K
C207 222
REC R
REC L
C209
C211
R276
C281
C406
C404 471
C412 121/100 L402 NCH-4183 4 3 2 6 1 C408 273 C410 101/100
273
C413 8.9 R402 100K 100/16 (1/2W) R409
C426 680 C424 681 L406 4.7MH
Q207 DTC114YS
OSC
R281
120
1K
R404 330K
C402 103
C247 394
1/50
400/12K
330K
R275 1K
390K
REC_MUTE
REC_R
3
R274
10
11
12
13
14
15
16
17
18
OSC_OUT
CLK
DO
STB
DAC_R
DAC_L
LEVEL_L
Q401
MPC1297CA
REC_R
NCH-4183
L401
R401 C407 C401 103 273 100K C422 10/16 R406 3.3K
REC_L DAC_R
47 (1/2W)
3 C414 47/16 4
2
1 6
DAC_L
R410
C405
C411 121/100
273
R407 22K
R405 3.3K
R408
22K
330K
C403 471
C409 101/100
R403
RESET
REC_L
9
8
7
6
5
4
3
2
1
L405 C421 100/500 R413 10 (1/2W) C423 C425
4.7MH 681 680 R411 39K C415 220/6.3 12V
472
C416 472
R 4 1 43 9 K
Q405 2SC1213C 183 C418 223
2SA950
5
2
C417
R412 5.6K
70/120
6
C427
R416 4.7
123/100
R415
C420
P401
R417
4
P
4.7
L403 NLO-2059 C419 47/16
1
Q403
R418 39K 4 3
BIAS ON/OFF
BIAS_CONT R/P
Q404 2SC1213C
39K
Q402 DTC114YS
PING
MUT
12V1
NAAF-7383
P903A
U2 Power supply circuit PC board
P901A T901 NPT-1434* AC-H
AC0
P903 R917 10K D910 5.6V R916 UDZS5.6B 560 Q901 78M12 1SS352 D909 1SS352 C916 10/16 I G O
+12VSIG
C917 104
E854 5.6
12V D908
C907
GND2
12V3
12V2
GND3
R725 330K C701 2.2/50
Q711 DTA114YS
R914
R915
470
C901 104
1000/16 470
AC1
AC1
F U S EE A5A U S E_ B F U A / 2_ 0 V E B F 2 S FUS
P901
F901 F 9 0 1 AF 9 0 1 B
104
AC-G
C903
5
2
5 6
AC2 AC2
D901 GP1N4003 D902 I GP1N4003 22V
Q903 78M12 G O
12V 223 R726 C702 3.9K Q710 DTC114YS D706
DC1
4
7
C703 223
AC0
Q905 78M05 1000/16
DC1
C 9 0 41 0 4
P902
GND
NC: No used
NAPS-7384
C915
4700/25
100/16
* NPT-1434D NPT-1434G NPT-1434P
C909
I
G
O
C905
1SS352
P706A
C223
C217 2.2/50
R207 1K
C213 104
10/16
104
104
R/P
R209
C114
1/50
10K
L203 NMC-6079
9
8
7
6
5
4
3
2
1
12EQIN[L]
9 LMIN[L]
2
183
P
C108 100/16
C107
70/120
70/120
Q103
C238 1/50
5 CCRL
3 2 1
4 5 6
6 HLSL
4 SS2L
3 SS1L
7 LLSL
LMOUT[R]50
R278 10K
NMC-6079 6 5 4
1/50
L204
R202
22K
R204
C103
NC
C204 222
C206 222
R206
U1 Main circuit PC board
Q203
OUTPUT(L)
C242
560
R208
223
223
6.8K
C220
1
10/16
1K
1/50
K-501A
A B
P205TEST POINT RCH LCH
C
NOTE
. THE COMPONENTS IDENTIFIED BY MARK A R EC R I T I C A L F O R S A F E T Y
D
SCHEMATIC DIAGRAM 2
U1 Main circuit PC board
C234 R272 100K 4.7/50 4.7/50 Q210 C237 4.7/50 R280 1M R224 12K 4.7/50
R E P L A C EO N L Y W I T H P A R T N U M B E R S P E C I F I E D . . V O L T A G E( M E A S U R E D W I T HV O L T M E T E R ) I S D C V O L T A G E (. N O I N P U T S I G N A L ) . ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED. . ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED. . ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED. . ELECTROLYTIC CAPACITORS ( ) ARE IN uF/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 FOR IMPROVEMENT.
10/16
1/50
C235
C220
C224
1
C236
DTC114TS
1K
6.8K
NC:Noused
C222 10/16 R233 10K R232 R210 10K D202 1SS352 10K R228 10K C250 223 R231 10K 39 38 REC R229 R266 P705 3.3K 56K R264 47K R809 270 D805 SEL6910D STANDBY R810 470 D806 SLV332VR DOLBY C C239 104 R812 R804 R803 470 R805 R225 100K 820 P705A R806 470 D810 D802 470 D809 470 D808 SEL6910D DOLBY B SEL6910D TAPE IN SEL6910D R.PLAY SEL6910D F.PLAY NC R255 2.2M R244 56K R282 12K 1M DTC114TS R273 Q209 2.2M 12K NC R245 2.2M R235 47K NC R236 100K R248 R247 68K 68K R237 100K R238 33K R239 33K R249 39K NC R2512.2M R241 82K NC R253 390K R242 100K DOLBY NR R814 NC R240 2.2M R243 NC 2.2M REV.MODE R815 R227 10K C249 223 S804 AUTO SPACE S805 REC/PAU S811 STOP S812 R822 ALBUM
LEVEL_R
EQCONT[R4 8 ]
D G N D4 7
E Q O U T [ R4 6 ]
EQIN[R] 49
C/B 44
NR_ON/OFF5 4
RST42
M P X4 3
LMIN[R] 52
LMDET[R]51
LMOUT[R]50
DATA 40 CLK INJ R265 47K R230 10K R807 470 D803 SEL6910D
STB 41
U3 Display circuit PC board
FADE R808 270 D804 SEL6910D ALBUM
1/50
BIASADJ[H] 37 BIASADJ[M] 36 BIASADJ[N] 35 GND 34 BIASCONT[R] 33 Q201 HA12169FB VCC2 VCC1 31 30 DACOUT[R]32
12V
DACOUT[L] 29 BIASCONT[L] 28 FM 27 FQ 26 F/Q 25 GH 24 13EQCONT[L] 11LMOUT[L] 10LMDET[L] 15EQOUT[L] 16N.NORM
C240 104
R226
100K
R811
470
D807
SLV332VR REV.MODE
12EQIN[L]
9 LMIN[L]
17N.HIGH
18N.MTL
2
GL 23 GP 22 21 19 20
14IREF
R802 R260 68K NC R261 2.2M R250 82K R262 390K NC R263 2.2M R252 390K
470 820
R254 56K 1SS352
R256 68K NC R257 2.2M R246 680K R258 82K
R259 33K
R801
D201
1/50
10K
1/50
R209
10/16
C233
4.7/50
D801
SEL6910D
R205 6.8K C219
100K
GND4
S806 S801 R813 STBY 390 S802 S807 R817 R818 R819 R.PLAY S809 R820 F.PLAY R821 R823 FADE 1.8K 1K FF REW S810 820 LOAD IN LOAD OUT SW GND LOAD IN SW 10K P703 12V GND MTR PLAY SW 5V ROT SEN SOL HIGH SW CASS IN SW R737 10K C704 223 R708 Q703 2SA933 F.REC SW 10K MTL SW R713 Q712 12V CAP DTC114YS 3.9K 2SB1068 R.REC SW 3.9K 390 470 EJECT
R271
C221
R279
R234 R 2 2 31 2 K 10/16
S803
R207 1K
C223
820
470
S808
R816
1K
S813 RI RI
LEVEL_L
P701
3
NADIS-7385
2 C918 3 1 R744 470
L702 1MH
223 R722 D708 390K
U2 Power supply circuit PC board
R750 100K
NC
1MH
5V
L701
C709
104
UDZS5.6B D703 1SS352 R721 47K
S717
FT-1
C711 223 C710 223
Q708 DTA114YS
REV.M 64
A L B U M6 1
D O L _ C6 3
FADE60
REC59
STBY62
KEY3[NC] 55
KEY254
V A R E F5 7
VASS56
KEY153
VDD58
F T5 2
FT-2 R730 R729 R728 R723 2.7K 2.7K 2.7K 2.7K R724 390
P706A
P706
1 DOL_B
LM[R] 51 LM[L] 50
2 TAPE_IN 1 2 3 4 5 6 7 8 9 3 R.PLY1 4 R.PLY2 5 F.PLY1 6 F.PLY2 7 NC1 8 NC2 9 NC3 10 NC4 11 NC5 R735 R736 10K 3.3K 12 NC6 13 NC7 14 DOOR_LOCK_OPEN 15 P-OFF 16 R.REC 25 TEST[VSS] 17 MTL_SW 18 F.REC R702 R703 R704 3.9K 3.9K 24 STB 3.9K 20CLK 23 CS 19 NC8 22 DO 21 DI TMP87CH14F Q701 LED
5V
B I A S _ C O N T4 9 R/P 48 70/120 47 L I N E _ M U T E4 6 O S C _ O U T4 5 400/12K 44 D O L _ R S T4 3 REC_MUTE 2 4 TA7291S O P E N _ S W4 1 C L O S E _ S W4 0 RI_OUT 39 RI_IN 38 ROT.SEN.37 D O O R _ C L O S3 6 E 30 CASS_IN 31 HIGH_SW D O O R _ O P E N5 3 28 XOUT 29 RESET SOL 34 CAP 33 32 PLAY R746 3.9K R745 3.9K R707 3.9K 1 100K LOAD OUT 3 2 R751 7 6 100/16 Q707 5 4 8 R720 1.8K C705 9 UDZS7.5B D702
4
10 11 12 13
26 VSS
R734
R733
R732
R731
2.7K
2.7K
2.7K
2.7K
27 XIN
R718
D T C 1 1 4 Y S3 . 9 K
5V
X701 CST8.00MG
R706 3.9K R705 3.9K SOL R727 3.9K
R717 Q706 2SB1068
47K
TO MECHANISM
Q702 5 YS #1,#8 NC BR93LC46F-WE2 6 7 8
Q713
R716 1SS352 R715 12K 5KB
P702 MTR SPEED A MTR SPEED B
4
3
2
1
TAPE SPEED ADJ.
5
03 3 5V Q704 R709 22K DTC114YS R712 1M
D701
TO MECHANISM
Q705 R714 47K
K-501A
A B C
C243 1000/16
D
E
P205TEST POINT RCH LCH C234 R272 100K 4.7/50 4.7/50 Q210 C237 4.7/50 R280 1M R224 12K
F
G
NOTE
. THECOMPONENTS IDENTIFIED BY MARK
H
A R EC R I T I C A L F O R S A F E T Y R E P L A C EO N L Y W I T H P A R T N U M B E R S P E C I F I E D . . V O L T A G E( M E A S U R E D W I T HV O L T M E T E R ) I S D C V O L T A G E (. N O I N P U T S I G N A L ) . ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED. . ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED. . ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED. . ELECTROLYTIC CAPACITORS ( ) ARE IN uF/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.
SCHEMATIC DIAGRAM
INPUT(R) R285 INPUT(L) R221 R283 R284 OUTPUT(R) 4.7K 4.7K C248 104 4.7K 4.7K
222
R270 UDZS4.7B D203 R220
6.8K R268 1K
Q206 2SD655 1.8K
2.2/50
104
104
4.7/50
C208
C210
C212
C218
C214 104
10/16
1/50
C235
Q204 DTA114YS
10/16
DTA114YS
C282
C283
P204
NC
C204 222 LINE MUTE L204 R278 10K NMC-6079 R202
C206 222 22K
R206
1
Q203
U1 Main circuit PC board
C103 2.2/50 R103 470
OUTPUT(L)
C242
560
R208
223
223
6.8K
C220
C222 10/16 R233 10K R232 R210 10K D202 1SS352 10K R228 10K C250 223 R231 10K 39 38
R204
C224
C236
DTC114TS
1K
C216
EX) PRINTING SIDE . CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.
NC:Noused REC P705
SS1R 58
SS2R 57
1/50
EQIN[R] 49
CCRR 56
EQCONT[R48 ]
LLSR 54
LMOUT[R]50
B I A _ T R A P R6 0
LMIN[R] 52
LMDET[R]51
E Q O U T [ R4 6 ]
HLSR 55
D G N D4 7
MPC1228HA R ch R101100K 8 7 6 5 C101 681 C104 2.2/50 R104 470
Q102 L ch 4 3 2 1 R222 18K
1 2 3
R218 6.8K 61 62 63 64
RECOUT[R]53
NR_ON/OFF5 4
PBOUT[R]59
6 5 4
M P X4 3
C/B 44
RST42
DATA 40 CLK INJ R229 R266 3.3K 56K R264 47K R809 270 D805 SEL6910D R265 47K R230 10K R807 470 D803 SEL6910D
R216
3.3K
STB 41
C232 R112 1.5K C110 10/16 R106 390K 120(1/2W) 470/16 R108 15K R107 15K C113 R105 390K C109 10/16 R111 1.5K R119 1.5K C228 R214 2.2K R213 R115 47KB C246 153 2.2K C227 R212 R211 C230 1/50 C226 68K 68K C225 1/50 C229 C231 R215
10/16 10/16 10/16
BIASADJ[H] 37 BIASADJ[M] 36 BIASADJ[N] 35 GND 34 BIASCONT[R] 33 DACOUT[R]32 Q201 HA12169FB VCC2 VCC1 31 30
FADE R808 270 D804 SEL6910D ALBUM
65 RPI[R]PBIN 66 67 VRI2[R]ACCUIN 68 CONT[R] 69 VRI1[R]LINEIN 70 GND2 71 GND1 72 VRI1[L]LINEIN 73 CONT[L] 74 VRI2[L]ACCUIN 75 76 RPI[L]PBIN 77 13EQCONT[L] 1 BIA_TRAPL 8 RECOUT[L] 11LMOUT[L] 15EQOUT[L] 2 PBOUT[L] 10LMDET[L] 78 79 80 16N.NORM
X
R120
1.5K
R226
R113
3.9K
P101
R114
X
C112 3.9K
681 R102 100K R116 47KB
C106 822
C240 104
100K
C102
STANDBY R810 470 D806 SLV332VR DOLBY C
C105 822
P.B.LEVEL
12V C239 104
10/16 10/16 10/16 3.3K
DACOUT[L] 29 BIASCONT[L] 28 FM 27 FQ 26 F/Q 25 GH 24 GL 23 17N.HIGH GP 22 18N.MTL 21 19 20
D T C 1 1 4 T SC 1 1 1
183
DTC114TS 183
C108 100/16 R110 120
R811
470
D807
SLV332VR REV.MODE
C107 100/16
Q104 X P.B.LEVEL
R117
70/120
R812 R804 R803 470 R805 R225 100K 820 P705A R806
470
D808
SEL6910D DOLBY B
R109 120
470
D809
SEL6910D TAPE IN
70/120
Q103
C238 1/50
12EQIN[L]
9 LMIN[L]
5 CCRL
3 2 1
4 5 6
6 HLSL
3 SS1L
4 SS2L
7 LLSL
14IREF
2
9 8 7 6 5 Q101
R/P
70/120
R217 6.8K
R802 R260 68K NC R261 2.2M R250 R248 R249 39K 82K R262 390K NC R263 2.2M R252 390K NC R253 390K R242 100K
470 820
470
D810 D802
SEL6910D R.PLAY SEL6910D F.PLAY
R254 56K 1SS352 NC R255 2.2M R244 56K
R256 68K NC R257 2.2M R246 680K R258 82K
R259 33K
R801
D201
1/50
C215
10K
1/50
10/16
C203 6.8K R219 222
C205 222
R209
C114 MPC1330HA 10/16
C233
R201
22K 560
4.7/50
L203 NMC-6079
D801
SEL6910D
4
3
2
1
R205 6.8K C219
100K
GND4
R203
R279
R282 12K 1M DTC114TS NC R245 2.2M R235 47K NC 2.2M 12K R236 100K R247 68K 68K NC R2512.2M R241 82K STBY
S806 S801 R813 390 S807 R817 R818 R819 R.PLAY S809 R820 F.PLAY R821 STOP 1.8K 1K FF REW S810 820 390 470 EJECT
R269
1K
1.8K Q205 2SD655
C241
R271
C221
10/16
R118
R273
R814
R267 1K
R237 100K R238 33K R239 33K
S802 DOLBY NR
R234 R 2 2 31 2 K Q209 C213 104 C217 2.2/50 10/16
NC R240 2.2M
R243
NC 2.2M REV.MODE
S803
C207 222
104
104
R/P
R207 1K
470
S808
REC R
REC L
C209
C211
C223
R227 10K
C249 223
S804 AUTO SPACE S805
R276
C281
C406
C404 471
C412 121/100 L402 NCH-4183 4 3 2 6 1 C408 273 C410 101/100
273
C413 8.9 R402 100K 100/16 (1/2W) R409
C426 680 C424 681 L406 4.7MH
1/50
400/12K Q207
R275 1K
330K
REC/PAU S811
R816
1K
R815
820
R281
120
OSC
1K
R404 330K
C402 103
S812
DAC_L DAC_R
R822
3.9K
DTC114YS
C247 394
ALBUM
REC_R LEVEL_R
REC_MUTE
S813 RI
R274
OSC_OUT
CLK
FADE
LEVEL_L
3
9 8 47 (1/2W) 3 C414 47/16 4
P701
NADIS-7385
2 3 C918 R744 470 1
10
11
12
13
14
15
16
17
18
U3 Display circuit PC board
390K
Q401
MPC1297CA
REC_R
DO
STB
RESET
REC_L
7
6
5
4
3
2
1
NCH-4183
L401
L702 1MH
223 R722 D708 390K
R401 C407 C401 103 273 100K C422 10/16 R406 3.3K S717 FT-1 R408 R407 22K R405 3.3K 22K C711 223
REC_L DAC_R
NC
1MH
DAC_L
5V
L701
2
1 6
C709
104
UDZS5.6B D703 1SS352 R721 47K
R410
C403 471
C409 101/100
R403 C405 330K
REV.M 64
FADE60
A L B U M6 1
D O L _ C6 3
REC59
KEY3[NC] 55
KEY254
V A R E F5 7
VASS56
STBY62
KEY153
VDD58
F T5 2
C411 121/100
273
FT-2 R730 R729 R728 R723 2.7K 2.7K 2.7K 2.7K R724 390
P706A
P706
L405 C421 100/500 R413 10 (1/2W) C423 C425
4.7MH 681 680 R411 39K C415 220/6.3 12V
1 DOL_B
LM[R] 51 LM[L] 50
2 TAPE_IN 1 2 3 4 5 6 7 8 3 R.PLY1 4 R.PLY2 5 F.PLY1 6 F.PLY2 7 NC1 8 NC2 9 NC3 10 NC4 11 NC5 R735 R736 10K 3.3K 12 NC6 13 NC7 14 DOOR_LOCK_OPEN 15 P-OFF 16 R.REC 17 MTL_SW 18 F.REC R702 R703 R704 3.9K 3.9K 24 STB 3.9K 20CLK 23 CS 19 NC8 22 DO 21 DI 25 TEST[VSS] TMP87CH14F Q701 LED
5V
B I A S _ C O N T4 9 R/P 48 70/120 47 L I N E _ M U T E4 6 O S C _ O U T4 5 400/12K 44 D O L _ R S T4 3 REC_MUTE 2 4 TA7291S O P E N _ S W4 1 C L O S E _ S W4 0 RI_OUT 39 RI_IN 38 ROT.SEN.37 D O O R _ C L O S3 6 E 30 CASS_IN 31 HIGH_SW D O O R _ O P E N5 3 28 XOUT 29 RESET SOL 34 CAP 33 32 PLAY R746 3.9K R745 3.9K R707 1 100K LOAD OUT LOAD IN LOAD OUT SW GND LOAD IN SW TO MECHANISM 3 2 R751 7 6 100/16 Q707 5 4 8 R720 1.8K C705 9 UDZS7.5B D702 R750 100K
472
C416 472
R 4 1 43 9 K
Q405 2SC1213C 183 C418 223
2SA950
5
2
C417
R412 5.6K
70/120
6
C427
R416 4.7
4.7
L403 NLO-2059 123/100 C419 47/16 C420
1
Q403
R418 39K 4 3
BIAS ON/OFF
BIAS_CONT R/P
9 10 11
R415
P401
R417
Q404 2SC1213C
39K
Q402 DTC114YS
4
12 13
26 VSS
PING
MUT
12V1
12V2
NAAF-7383
R917 10K D910 5.6V R916 UDZS5.6B 560 Q901 78M12 1SS352 D909 1SS352 C916 10/16 I G O
+12VSIG
P903A
C917 104
R733
R732
R731
R734
U2 Power supply circuit PC board
P901A
NAPS-7384
P903
GND2
12V3
GND3
27 XIN
3.9K 2.7K 2.7K 2.7K 2.7K X701 CST8.00MG R706 3.9K R705 5.6 4 3 2 1 R727 3.9K 8 1SS352 R715 12K 5KB 3.9K SOL Q713
C710
223
Q708 DTA114YS
R718
E854
D T C 1 1 4 Y S3 . 9 K
5V
R717 Q706 2SB1068
47K 12V
P703
D908
C907
Q702 R725 330K C701 2.2/50 DTA114YS #1,#8 NC BR93LC46F-WE2 Q711 5 6 7
R716
P702
12V
TAPE SPEED ADJ.
R914
R915
470
470
T901 NPT-1434* AC-H
AC0
C901 104
1000/16
MTR SPEED A MTR SPEED B GND MTR PLAY SW 5V
AC1
AC1
2 F U S 2 A /A F U V E _ B E_ 250S
5 C903 6
AC2 AC2
P901
F901 F 9 0 1 AF 9 0 1 B
104
AC-G
D901 GP1N4003 D902 I GP1N4003 22V
223 R726
C702
DC1
5
Q903 78M12 G O
D701
R823
10K
12V 3.9K Q710 DTC114YS D706 C703 223 R737 10K 223 R708 C704 Q703 2SA933 10K 5V
ROT SEN SOL HIGH SW CASS IN SW F.REC SW MTL SW R713 Q712 12V CAP DTC114YS 3.9K 2SB1068 R.REC SW
TO MECHANISM
4
7
AC0
Q905 78M05 1000/16
DC1
C 9 0 41 0 4
P902
C915
4700/25
100/16
* NPT-1434D NPT-1434G NPT-1434P
C909
I
G
O
C905
1SS352
Q704 R709 22K DTC114YS R712 1M
GND
Q705
R714
47K
K-501A SCHEMATIC DIAGRAM
MECHANISM SECTION Rec/Play/Erease Head
1. L +
L
2. L -
R/P HD
R
3. R 4. R +
E HD
5. E 6. E +
Control circuit PC board UNLOAD SW COM LOAD SW MTR-(CW)(UNLOAD) MTR+(CCW)(LOAD)
1 2 3 4 5
MTR
Main circuit PC board
R.REC SW METAL SW F.REC SW PACK SW HIGH SW + SOL SENSOR OUT +5V SENSOR PLAY SW + MTR - COM MTR SPEED A MTR SPEED B 1 2 3 4 5 6 7 8 9 10 11 12 13
MECHA CHASSIS
B A + -
SOL
MTR
K-501A
D
L405
E855 J109 L406 L405 P101 C233 C104 J110 J122 J117 J118 J123 12 12 J112 22 22 20 J126 20 J113 J116 C231
L406
C221
C232
E851
C217
C211 L R C215 L203 L203 C219
C209
C246
C207
C205
C203 C223
L403
L403
C
C420
E853 P401 C103 J104 Q404 7 J101 J108 C418 C113 C108 C114 R117 C107 C113 C417 C416 C409 C105 C106 C407 J119 J120 L401 L401 J102 C422 C112 J115 P.B.LRVEL J106 C421 R410 C109 R413 L402 J114 L402 C111 C110 Q401 Q401 C414 C247 Q102 C411 C419 C101 Q101 C102 C427 J105 Q405 7 C281 J124 C243 J125 7 J127 J128 J107 R115 J121 R116 Q403 J111
C238
C229 J140 P205 J139
C213 J142
J141
C227 J134
P204
25137383A
J132 L204 L204 1 C234 15 J133 C243 C237 J136 27 27
C226
C405 C403 C401
C230
C242
J147
C214
J145 C216 C236 J137 J154 J135 J131 J130 17 J129 C224 22 C218 25 C220 27 P706A 7 C235 C222 C208 C210 C212
J150
C204
J151
C206
C282
Q205
Q206
C228
J153
J152
B
J103
C402
C408 C412 C410 C413 C406 R409 C415
P903A
PRINTED CIRCUT BOARD VIEW 1
1
2
3
4
5
Component side from soldering side U1 Main circuit PC board NAAF-7383
C404
A
20
NCAF-7383
J1004
UPP
J1003
UGT
J1002
UDT
J1001
UJJ
P204 20
C225
J144 J146
20
J143
C241
17
7
K-501A
A B
R408 R406 R405 R407
C
D
PRINTED CIRCUIT BOARD VIEW 2
1
R404
R403
R401 R402
R502
U1
R412
R503 R411
Main circuit PC board NAAF-7383
R414
R417
R415
R416
Q402
R103 R501 R113
Q103
R111
R105
2
Q104
R120 R114 R106 R110 R102
R112 R108
R107
R119
R109 R101
R418 C423 C425 C426 R104 C424 R234 R244 R254 R505 R506 R235 R245 R255 R236 R246 R256 R507 R225
R118 R508 R509 R237 R247 R257 R238 R248 R258 R510 R511 R239 R249 R259 R512 R513 R240 R250 R260 R241 R251 R261
R504 D202 C250 R228 R227 D201 R276 R275 R281 C249 R224
3
Soldering side
R265
R229 C239 C240 R266 R516 R517 R274 R518 R519 R230 R231 R232 R233 R264 R226
R223
R279
R273
Q207
R514 R515 R242 R252 R262 R243 R253 R263
R282
40
21
R271
R207
41
Q201
20
R209 R520
60
Q201
1
R205
4
R210 R208 R272 R217
R206
R280
61
R218 R211 R216
Q210
80
R222
R212
R215
R202 R204 R214 R213
C283
Q203
R220
R270
C248
R201 R203
D203
5
Q204
R283 R221 R284 R285 R278
R268 R267
R269
R219
Q209
L R
K-501A
A B
U2
C
D
PRINTED CIRCUIT BOARD VIEW 3
1
Power supply PC board NAPS-7384
P902 P902 T901 E852 C901 F901A R902
AC-H
T2AL250V
R901 J903 AC-G F901 F901B AC-G 15
J901
C903 D901 J902 D902 C905
C904
C905
AC-H
T901 J904
2
17 R716
J926 Q706 C907 C907 Q707 Q901
ROT_S J919 7 J925 J920 X701
3
J934 P903 E854 7
J931 J932
2
J935 J933
4
EJECT 7
S806 J705
D810
20
20
S807
J701
J702
U3
Display circuit PC board NADIS-7385 Component side from soldering side
D808
FF REW S808
2
2
D803
D804
J704
D805
2 2 2
5
S809 F_PLAY S810 R_PLAY S811 STOP
2 2
D801
S804 A_SPACE
2 2 2
S803 REV_MODE
S802 DOLBY
D809
D807
D802
S805 REC J703
S812 FADE
S813 ALBUM
NCDIS-7385 25137385 0
2
D806
7
P901 J906 GND Q903 GND 7
C909 C909 J938 C914 C915 J913
7 J905 7
C916
C701
J909 7 J907 J908 5V
R909
Q705
Q905
J937 SPEED
P702 J911 J912
P705
P701 P701 J936
J914 C705
NCPS-7384
25137384
J915 J916 J917
1
J921
J923
J922
J924
J918 FT
J927
20
20 CLK
20
20
P703 S717
20
DO DI
STB J929 J930
CS
J928
P706
2
Component side from soldering side
P705A
2
S801 STBY
K-501A
A B C D
PRINTED CIRCUIT BOARD VIEW 4
U2 Power supply PC board NAPS-7384 Soldering side
1
2
R915 C703 C702 C917 R917 D910 R726 D706 D909 D908 R916 R729 R914
R706
Q710
R704
R714
R713
Q712
Q711
R725 R801 R802 R803 R735 R804
R736
R715 C918
R708 C704
R703 R702
R751
R718
Q703
D701
R709
R705
Q701
R712
R717
19
1 64 Q701
R728 R730 R724 R723
Q713
Q704
R744
R737 R707 C709
3
20
R722
D708
R573
52 33 51
R746 R745
R750
R720
R572
R571
D703 R721
D702
8
Q708
Q702
C710 R732
L702
L701 R817
1
R727
R734 R733
4
R806
U3
Display circuit PC board
NADIS-7385
Soldering side
R805 R812 R811 R818 R808 R819 R809 R810
5
R820 R821
R807 R816 R815 R814
R823
R813
R822
R731
C711
K-501A PARTS LIST
CIRCUIT PARTS 1
REF. NO. Q101 Q102 Q201 Q401 Q701 Q702 Q707 Q901,Q903 Q905 Q103,Q104 Q203,Q204 Q708,Q711 Q205,Q206 Q207,Q402 Q704,Q710 Q712,Q713 Q209,Q210 Q403 Q404,Q405 Q703 Q705,Q706
PART NO. ICs 22240147 222905 22241144R3HI 222959 22241751R3 22241609R2 22240239 222780125NEC or 222780125JRC 222780055 Transistors 2216680R2 2216360R2 2216480R2 2211705 or 2211706 2216260R2 2216470R2 2216670R2 2211504 2201883 2214640R2 2212853 or 2212855 Diodes 22380035 or 22380260 223234R2 or 223269R2 223234R2 or 223269R2 223234R2 or 223269R2 223234R2 or 223269R2 224550470R2 224550750R2 224550560R2 LEDs 225390 225322 225324D 225404 225390
DESCRIPTION
MPC1330HA MPC1228HA HA12169FB MPC1297CA TMP87CH14F-3JJ5 BR93LC46F-WE2 TA7291S MPC78M12HF NJM78M12FA 78M05HF
RN1411 RN2407 DTA114YKA 2SD655-E 2SD655-F RN1407 DTC114YKA
DTC114TKA 2SA950-Y 2SC1213-C 2SA1037K 2SB1068-K 2SB1068-U
D901,D902 D201,D202 D701,D703 D706,D908 D909 D203 D702 D708,D910 D801,D802 D803 D804,D805 D806 D807-D810
GP104003E RL1N4003 1SS352 1SS355 1SS352 1SS355 1SS352 1SS355 1SS352 1SS355 UDZS4.7B UDZS7.5B UDZS5.6B
SEL2910A-TP6 SEL6210S SEL6910A-D SEL2210R TP6 SEL2910A-TP6
Note ...Europian model only ...120V model only ...220-230V model only THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE ONLY WITH PART NUMBER SPECIFIED.
K-501A PARTS LIST
CIRCUIT PARTS 2
REF. NO. L401,L402 L405,L406 L203,L204 L403 L701 X701 C243,C907 C909 C107,C108 C413,C705 C915 C109,C110 C221-C226 C229-C232 C241,C242 C422,C916 C114 C113 C414,C419 C215,C216 C219,C220 C227,C228 C238,C281 C217,C218 C701 C233-C237 C415 C101,C102 C105,C106 C111,C112 C203-C208 C209-C214 C247 C901,C903 C904 C409,C410 C411,C412 C420 C103,C104 C905
PART NO. Coils 231127 231085 233407 231215 230955R2 Oscillator 3010341 Capacitors 354741029 354741019
DESCRIPTION
NCH-4183 NCH-2133 NMC-6079 NLO-2059 BK1608HS102-T
CSTLS8M00G56
1000uF,16V,Elect
100uF,16V,Elect
354741009
10uF,16V,Elect
354744719 354744709 354780109
470uF,16V,Elect 47uF,16V,Elect 1uF,50V,Elect
354780229 354780479 354722219 374726814 374728224 374721834 374722224 374721044 374723944 374721044 370131014 370131214 370131234 391980227 391963327
2.2uF,50V,Elect
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
APS100V-101J APS100V-121J APS100V-123J 2.2uF,50V,Elect 3300uF,35V,Elect
Note ...Europian model only ...120V model only ...220-230V model only THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE ONLY WITH PART NUMBER SPECIFIED.
K-501A PARTS LIST
CIRCUIT PARTS 3
REF. NO. R117,R409 R410 R413 R115,R116 R716 S717 S801-S813 Q901A
PART NO. 443521214 443524704 443521004 5210296 5210261 Switches 25035699 Heat sink 27160391
DESCRIPTION
120ohm +/-5% 1/2W,Metal oxide 47ohm +/-5% 1/2W,Metal oxide 10ohm +/-5% 1/2W,Metal oxide N06HR47KBE,Trimming N06HR5KBC,Trimming
NPS-111-S662
HEAT SINK
Fuse holders F901A,F901B 25052133 Jacks P204 25045305 P701 25045330 Plugs P101 25055136 P205 25055689 P401 25055132 P702 25055157 P703 25055149 P705 25055158 P706 25055709 P901 25055675 P903 25055704 Sockets P706A 25051238 P902 25051990 25051637 25051637 P903A 25051233 P705A 2002E392825 Holder E852 27190608-1 Retainer E854 27141059 Clamp E851 260224 Screws Q901A,Q903B 82143010
NSCT-1P2031
NPJ-4PDBL164 NPJ-2PDBL184
NPLG-6P120 NPLG-2P645 NPLG-2P116 NPLG-13P141 NPLG-5P133 NPLG-14P142 NPLG-13P665 NPLG-2P631 NPLG-8P660
NSCT-13P1028 NSCT-2P1777 NSCT-2P1424 NSCT-2P1424 NSCT-8P1023 NSAS-28P1000
(CRAMP) UA-0 V0
CP-1S
3P+10FN(BC),Pan head screw
Note ...Europian model only ...120V model only ...220-230V model only THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE ONLY WITH PART NUMBER SPECIFIED.
K-501A IC BLOCK DIAGRAM 1
EQ CONT(L) REC OUT (L) HLS DET (L) LLS DET (L) EQ OUT(L) LM OUT(L) LM DET(L)
Q201:Dolby IC (HA12169FB)
LM IN(L) PB OUT (L) CCR(L) SS1(L) SS2(L) TP
EQ IN(L)
NR ON/OFF
D-GND
RESET 42
MPX
60 V REF (L) NRIN(L) IAOUT(L) BIAS RPI(L) VR3(L) VR2(L) CONT(L) VR1(L) 61 62 63 64 65 66 67 68 69 70 GND 71 VR1(R) CONT(R) VR2(R) VR3(R) RP1(R) REF(R) IAOUT(R) NRIN(R) VREF(R) 72 73 74 75 76 77 78 79 80 1 TP(R)
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
41 40 DATA
RECT Dolby B/C NR DA LMA
EQ VOL
STB
C/B
39 CLK SW REQ LL Logic 38 IN J
37 BIAS ADJ(C) 36 BIAS ADJ(M)
DAC E.VOL
35 BIAS ADJ(N) 34 GND 33 BIAS CONT(L) 6BIT DAC 32 DAC OUT(L) 31 30 VCC
6BIT DAC
6BIT DAC
6BIT DAC
29
DAC OUT(R)
28 BIAS CONT(R) 27 FM 26 fQ 25 f/Q 24 GH 23 GL RECT EQ VOL 22 GP 21 HM EQ-Controller
E.VOL DAC LMA DA Dolby B/C NR REQ
2 PB OUT
3 SS1(R)
4 SS2(R)
5 CCR(R)
6 HLS DET(R)
7 LLS DET (R)
8 REC OUT (R)
9 LM IN(R)
10 LM DET(R)
11 LM OUT (R)
12 EQ IN (R)
13 EQ CONT(R)
14 IREF
15 EQ OUT(R)
16 NN
17 NC
18 NM
19 HN
20 HC
Q101:Recording amplifier IC(MPC1297CA)
VCC 18 VR2 17 VIN(R)2 16 PH2 15 CIN2 14 COUT2 VOUT21 VOUT22 13 12 11 VIN 10
SIGNAL INPUT
PEAK HOLD COMPARATER
VCA OUT
POWER SUPPLY
PROTE CTION COMPARATER SIGNAL INPUT PEAK HOLD VCA OUT
PRE DRIVER
1 VS1
2 VR1
3 VIN(R)1
4 PH1
5
6
7
8
9 GND
CIN1 COUT1 VOUT11 VOUT12
K-501A IC BLOCK DIAGRAM 2
Q707 : TA7291S(Motor drive) Vcc 2 8 Vref 6 VS
REG
PROTECT
9 IN 1 IN 2
1 GND
5
7 M
3
OUT 1
OUT 2
OPERATION STOP FORWARD REVERSE BRAKE
INPUT IN 1 IN 2 0 0 1 0 0 1 1 1
OUTPUT OUT 1 OUT 2 H L L L H L
K-501A
MICROPROCESSOR CONNECTION DIAGRAM
Q701:TMP87CH14F
AUTO SPACE REV. MODE DOLBY NR STANDBY REC/PAU R.PLAY F.PLAY ALBUM
10K
3.9K
1.8K
1K
820
470
390
EJECT
STOP
FADE
REW
FF
1K
820
470
390
Q201
FT 1 FT 2 11.5V
L402 L401 Q101
+5V
Q102
Q401 Q203.Q204 Q205.Q206
G10 G11 G12 G13 G14 G15 VDD VAREF VASS
NC
K2 K1 FT
64 63 62 61 60 59 58 57 56 55 54 53 52
+5V
Q601 TRAY MOTOR DRIVER Q702 Q711 POWER FAILURE DET. BR93LC46F-WE2
20 21 22 23 24 25 26 27 28 29 30 31 32
CLK DI DO CS STB TEST VSS XIN XOUT RESET CASS IN HIGH SW PLAY
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
DOL B TAPE IN R.PLY1 R.PLY2 F.PLY1 F.PLY2 N1 NC (+5V) N2 NC (+5V) N3 NC (+5V) N4 NC (+5V) N5 NC (+5V) N6 NC (+5V) N70 NC(GND) DOOR LOCK OPEN P-OFF R.REC MTL SW F.REC NCB
LM(R) LM(L) BIAS CONT R/P 70/120 LINEMUTE OSCOUT 400Hz/12kHz DOLBYRESET RECMUTE OPENSW CLOSESW RIOUT RIIN ROI.SEN DOOR CLOSE DOOR OPEN SOL CAP
51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
TRAY OPEN DET SWITCH
TRAY CLOSE DET SWITCH
SYSTEM BUS
220K
ROT SENSOR
5V 47K 5V
X701 8MHz
PLAY SW MECHA
11.5V 11.5V
Q707 TA7291S MOTOR DRIVE
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
K-501A MICROPROCESSOR TERMINAL DESCRIPTIONS
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 51 52 53 54 55 56 57 58 59 60 61 62 63 64 Terminal DOLBYBLED TAPEINLED REVLED1 REVLED2 FWDLED1 FWDLED2 NOT USED NOT USED NOT USED NOT USED NOT USED NOT USED MODEL MODE DCHECK POFF PRECINHSW METALSW FRECINHSW VKK CLOCK SIN SOUT CS STB TEST VSS XIN XOUT RESET PACKSW HIGHSW PLAYSW CAPSTAN SOLENOID OPEN CLOSE RSENSOR RIIN RIOUT CLOSESW OPENSW RECMUTE DOLBYRESET 400Hz/12kHz OSCOUT LINEMUTE 70/120 REC/PB BIAS LEVELLCH LEVELRCH KEYIN4 KEYIN3 KEYIN2 KEYIN1 VASS VAREF VDD RECLED FADELED ALBUMLED STBYLED DOLBYCLED REVERSELED I/O O O O O O O DESCRIPTION Dolby B indicator control output pin Cassette tape detection indaictor control output pin Reverse direction indicator control output pin Reverse direction indicator control output pin Forward direction indicator control output pin Forward direction indicator control output pin Not used. Not used. Not used. Not used. Not used. Not used. Model judgement input pin Load detection input pin when a door closes. Power failure detection input pin Prohibition against reversal recording input pin Metal switch detection input pin Prohibition against foward recording input pin Not used. Control for EEPROM Data input for EEPROM Data output for EEPROM Chip select for EEPROM Standby port Connect to GND Connect to GND Clock OSC(8MHz) Clock OSC(8MHz) System reset Cassette detect switch High switch detect Play switch detect Capstan control Solenoid control Door control Door control Rotate sensor System code input pin System code output pin Door close detect Door open detect Recording mute control Dolby IC reset Switched 400Hz/12kHz OSC output 400Hz/12kHz Line mute control Tepe select port Mode select port Bias select A/D Control for input level(Lch) A/D Control for input level(Rch) A/D Control A/D Control A/D Control A/D Control Ref. Voltage for A/D compareter +5V Ref. Voltage for A/D compareter GND +5V REC indicator control output pin FADE indicator control output pin ALBUM indicator control output pin STANBY/ON indicator control output pin Dolby C indicator control output pin Reverse mode LED indicator control output pin
I I I I I I I I I O O
I I I I O O O O I I O I I O O O O O O O O I I I I I I
O O O O O O
K-501A ADJUSTMENT PROCEDURES
PRECAUTIONS 1. Before adjustment, clean the following parts with an alcohol moistened swab. *recording/playback head *pinch roller *capstan *erase head TEST EQUIPMENT/TOOL REQUIRED Audio Oscillator Digital frequency counter Oscilloscope Attenuator AC voltmeter Non-magnetic screwdriver Test tapes TCC-153 MTT-111N MTT-150 :10kHz, -10dB :3kHz,-10dB :Dolby level calibration 400Hz, tone 200nWb/m
2. Do not use magnetized screwdriver for adjustment. 3. Demagnetize recording/playback head with a head demagnetizer.
Item
Connection of instrument Frequency
Line output level/freq.
Test tape
Mode
Output indicator
Adjustme nt point
Adjustment
Remarks
1
Tape speed
counter to P205 or LINE OUT terminal. AC voltmeter
MTT111N
PB
Frequency counter
R716
3010Hz
Maximum level TCC-153 PB AC voltmeter Fig.1 & same phase at channels L &R R115 Refer to Fig.2.
2
Head azimuth
& oscilloscope to P205
3
Playback level
AC voltmeter to P205
MTT150
PB
AC voltmeter
(L ch.) R116 (R ch.)
300mV
Frequency 4 Bias frequency counter to lead wire of erase head Auto Rec, level adjustment Normal tape REC Frequency counter L403 85kHz
5
Normal tape
REC/PB
Auto(S717)
Push a auto-adjust button(S717)
Blank tapes Normal High Metal UDUDC-90 C-90 PLAY torque ............... 30 FF/REW torque ............80 Back tension ............... 2 70g/cm (Use the test tape TW-2231.) 180g/cm (Use the test tape TW-2111.) 6g/cm (Use the test tape TW-2111.)
XS C-60
K-501A ADJUSTMENT POINT
R L L403 P205
NCAF-7383 25137383A
1
P.B.LEVEL
R116
R115
R716 SPEED
NCPS-7384 25137384 1 S717
PHASE CHART
0 deg. 45 deg.
AF OSC
AF Attenuator
VTVM
K-501A
LINE IN LINE OUT
OSC
90 deg.
180 deg.
VER HOR
VTVM
L
K-501A
R LINE OUT
K-501A PACKING VIEW
C10
C8
C9
C3 Up C7 C5 Accessories Front
C1
C4 Front
C2
K-501A PARTS LIST
PACKING VIEW
REF. NO. C1 C2 C3 C4 C5 C7 C8 C9 C10
PART NO. 29092028A 29053865 29092029 29363044 29095835 29100097-1A 2010376 2010375 29343267 29343268 29343269 29343270
DESCRIPTION
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 Instruction manual U3GSWD Instruction manual U3FSI
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: [email protected] 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
HOMEPAGE http://www.onkyo.co.jp/