Sanyo TRC-2050C User manual

Service Manual
FILE NO.
TRC-2050C (XE)
(US)
PRODUCT CODE No.
164 100 00(XE)
164 100 01(US)
REFERENCE No. SM5810410
Tape adjustments ............................................................1
Exploded view .................................................................. 2
Parts list ...........................................................................3
Wiring connection ............................................................4
Schematic diagram
(AMPLIFIER).................................................................6
Wiring diagram
(SWITCH)......................................................................5
(AMPLIFIER).................................................................8
Contents
Compact Cassette Recorder

- 1 -
TAPE ADJUSTMENTS
a. Adjusting Azimuth
(1) Load an azimuth adjustment test tape (VTT-703 etc., 10 kHz)
in tape deck.
(2) Press the PLAY button.
(3) Use a cross-tip screwdriver to turn the screw for azimuth
adjustment so that the left and right outputs are maximized.
(4) Press the STOP button.
• After replacing the head, demagnetize the head by using a
degausser.
• All wiring should be returned to the original position after work is
completed.
b. Replacing the Head
PLAY
HEAD AZIMUTH ADJUSTMENT
R / P HEAD
GRAY
BLACK
WHITE
WHITE
• Clean the head, capstan and pinch roller before making any measurement.
d. Checking the Mechanism Torques
Measurement Take-up torque Back tension Tape tension
Cassette for PLAY : TW-2111A PLAY : TW-2111A Drive-power cassette
measurement F.FWD / REW : TW-2231 TW-2412
PLAY 23~50 gr.cm 1.0~5.0 gr.cm 30 gr or more
F.FWD 55 gr.cm more --- ---
REW 55 gr.cm more --- ---
TAPE PLAY SPEED
SLOW NOR FAST
TAPE SPEED CONTROL
MOTOR SPEED
ADJUSTMENT
SPEED
2.4 4.8
(1) Inset the test tape (TCC-119 etc., 3000 Hz).
(2) Press the PLAY button.
(3) Use a flat-tip screwdriver to turn the VR403 to adjust so that
the frequency counter becomes 3000 Hz.
c. Adjusting Tape Speed
• Use a plastic screwdriver for adjustment.
• Be sure to clean the heads before attempting to make any adjustment.
• Be sure both channel's waveform are the same for the phase matching.
• Be sure both channels (1 and 2) are the same level using a dual-channel oscilloscope.
• After completion of the adjustment, apply the threadlock (TB-1401B) to the azimuth adjustment screws to fix them securely.

- 2 -
1
3
4
56
7
Y01
Y04
Y04
Y03
Y02
Y01
8
9
10
11
12
13
14
TM2050CTN-SH
TAPE MECHANISM
TM2050CTN-SH
15
16 17 18 20
21
22
25
26
27
72
24
23
19
2
71
TM1
TM5
TM2 TM3
TM4
EXPLODED VIEW CABINET & CHASSIS

- 3 -
PARTS LIST
CAUTION :Regular type resistors and capacitors are not listed. To know those values, refer to the schematic diagram.
Regular type resistors are less than 1/4 W carbon type and 0 ohm chip resistors.
Regular type capacitors are less than 50 V and less than 1000 µF type of Ceramic type and Electrical type.
N.S.P : Not available as service parts.
PRODUCT SAFETY NOTICE
EACH PRECAUTION IN THIS MANUAL SHOULD BE FOLLOWED DURING SERVICING. COMPONENTS IDENTIFIED WITH THE IEC
SYMBOL
!
!!
IN THE PARTS LIST AND THE SCHEMATIC DIAGRAM DESIGNATED COMPONENTS IN WHICH SAFETY AND PERFORMANCE
CAN BE OF SPECIAL SIGNIFICANCE. WHEN REPLACING A COMPONENT IDENTIFIED BY
!
!!
, USE ONLY THE REPLACEMENT PARTS
DESIGNATED, OR PARTS WITH THE SAME RATINGS OF RESISTANCE, WATTAGE OR VOLTAGE THAT ARE DESIGNATED IN THE
PARTS LIST IN THIS MANUAL. LEAKAGE-CURRENT OR RESISTANCE MEASUREMENTS MUST BE MADE TO DETERMINE THAT
EXPOSED PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE PRODUCT TO THE
CUSTOMER.
PACKING & ACCESSORIES
REF.NO. PART NO. DESCRIPTION
614 325 9411 CARTON CASE,INNER(XE)
614 326 9113 CARTON CASE,INNER(US)
614 327 5428 CUSHION
614 326 2756 CASE,CARRYING
614 325 9435 INSTRUCTION MANUAL(XE)
614 327 0430 INSTRUCTION MANUAL(US)
645 016 1018 ADAPTOR,AC-DC(US Only)
CABINET & CHASSIS
REF.NO. PART NO. DESCRIPTION
1614 325 6854 DEC,MIC
2614 325 8650 ASSY,LID,CASSETTE
3614 325 6984 SPRING,OPEN
4614 325 6816 BUTTON,INDEX
5614 325 6922 KNOB,SLIDE,REC,MODE
6614 325 6861 DEC,WINDOW,LED
7614 325 6847 COVER,LID
8614 294 5346 LEVER,REC
9614 295 9763 SPRING,WIRE,REC LEVER
10 614 326 8802 ASSY,CABINET(XE)
10 614 326 8826 ASSY,CABINET(US)
11 614 246 5776 COUNTER
12 614 325 6953 SPACER,MECHA,COUNTER
13 614 268 8298 STRAP,SET
14 614 325 6762 BUTTON,REC
15 614 325 6779 BUTTON,PLAY
16 614 325 6786 BUTTON,STOP
17 614 325 6793 BUTTON,REW
18 614 325 6809 BUTTON,FWD
19 614 295 9251 BELT,SQUARE,COUNTER
20 614 294 5353 LEVER,RP
21 614 325 6991 TERMINAL,BATTERY(-)
22 614 295 9770 TERMINAL,(+)
23 614 325 6915 KNOB,SLIDE,PLAY,SPEED
24 614 325 6892 KNOB,SLIDE,VAS
25 614 325 6946 LID,BATTERY
26 614 325 8643 ASSY,CABINET,BOTTOM
27 614 325 6908 KNOB,SLIDE,PAUSE
FIXING PARTS
REF.NO. PART NO. DESCRIPTION
Y01 411 098 5202 SCR S-TPG PAN 2X5,
LID,CASSETTE/COVER
Y02 411 022 7708 SCR S-TPG PAN 2X5,MECHA/CABI
Y03 411 022 7807 SCR S-TPG PAN 2X6,PWB/CABI
Y04 411 022 8606 SCR S-TPG PAN 2X8,CABI-CABI REAR
SWITCH P.W.BOARD ASSY
REF.NO. PART NO. DESCRIPTION
71 614 325 5048 ASSY,PWB,SW(Only Initial)
D4200 407 229 9409 LED SML-311DT
IC420 409 525 6601 IC TC7WB66FK
S4200 645 057 0056 SWITCH,SLIDE 2P-2T,DICT/CONFSW
S4201 645 018 0361 SWITCH,PUSH 1P-1T,CUE-INDEXSW
AMPLIFIER P.W.BOARD ASSY
REF.NO. PART NO. DESCRIPTION
72 614 325 5031 ASSY,PWB,AMP(Only Initial)
C4701 403 355 9306 TA-SOLID 47U M 6.3V
C4708 403 355 9306 TA-SOLID 47U M 6.3V
C4723 403 355 9306 TA-SOLID 47U M 6.3V
C4801 403 355 9306 TA-SOLID 47U M 6.3V
C4812 403 355 9306 TA-SOLID 47U M 6.3V
CN401 645 057 0063 JACK,PHONE D3.6,EXTMIC
or 645 061 3418 JACK,PHONE
CN402 645 057 0063 JACK,PHONE D3.6,EXTMIC
or 645 061 3418 JACK,PHONE
CN403 645 057 0582 JACK,PHONE D2.5,REMOTE
CN405 645 057 0070 JACK,PHONE D3.6,EARPHONE
or 645 061 3401 JACK,PHONE
CN491 645 027 2998 SOCKET,DC,DCJACK
D4001 407 003 3609 DIODE DAN202K
D4002 407 149 0807 DIODE 1SS355
D4003 407 149 0807 DIODE 1SS355
D4701 407 206 5608 ZENER DIODE UDZS10B
D4801 407 206 5608 ZENER DIODE UDZS10B
D4901 407 206 5608 ZENER DIODE UDZS10B
D4921 407 225 0301 DIODE RB161M-20
IC401 409 245 5106 IC LA4167M
IC402 409 245 5106 IC LA4167M
IC403 409 525 6601 IC TC7WB66FK
IC404 409 543 7307 IC TC7SB66FU
IC405 409 525 6601 IC TC7WB66FK
IC406 409 543 7307 IC TC7SB66FU
IC407 409 543 7307 IC TC7SB66FU
IC408 409 543 7307 IC TC7SB66FU
IC409 409 525 6601 IC TC7WB66FK
Q4001 405 011 1006 TR 2SC1623-L6
or 405 146 2107 TR KTC3875-Y
or 405 146 2206 TR KTC3875-GR
or 405 014 4509 TR 2SC2412K-R
Q4002 405 146 2206 TR KTC3875-GR
or 405 146 2107 TR KTC3875-Y
or 405 011 1006 TR 2SC1623-L6
or 405 014 4509 TR 2SC2412K-R
Q4003 405 146 2206 TR KTC3875-GR
or 405 146 2107 TR KTC3875-Y
or 405 011 1006 TR 2SC1623-L6

- 4 -
This is a basic wiring connection.
WIRING CONNECTION
PARTS LIST
REF.NO. PART NO. DESCRIPTION REF.NO. PART NO. DESCRIPTION
M
BLACK
BLACK
BLACK
RED
RED
RED
RED
GRAY
BATTERY
DC 3V
BATT + BATT -
-+
MOTOR
HEAD A
HEAD B
PLAY SWITCH
HEAD-A +
HEAD-A - HEAD-B +
HEAD-B -
MIC2-GND
MIC-2 +
MIC-1 + MIC 1
CN401
MIC 1MIC 2SPEAKER
MIC 2
CN402
HP
CN405
MIC1
-GND
SP -
SP +
P.SW
P.SW
BLUE
WHITE
CN491
EXT. DC 3V
CN403
REMOTE AMPLIFIER
P.W.B
SWITCH P.W.B
TAPE DECK
MECHANIZUM
TAPE MECHANISM
REF.NO. PART NO. DESCRIPTION
614 325 8896 ASSY,MECHA,TM-2050CTN-SH
TM1 645 027 2318 HEAD,ERASE
TM2 645 059 8296 HEAD,R/P
TM3 645 027 2561 ASSY,PINCH ROLLER
TM4 645 059 7305 ASSY,MOTOR
TM5 645 027 2745 MAIN BELT
or 405 014 4509 TR 2SC2412K-R
Q4004 405 014 4509 TR 2SC2412K-R
or 405 011 1006 TR 2SC1623-L6
or 405 146 2206 TR KTC3875-GR
or 405 146 2107 TR KTC3875-Y
Q4005 405 146 2206 TR KTC3875-GR
or 405 146 2107 TR KTC3875-Y
or 405 011 1006 TR 2SC1623-L6
or 405 014 4509 TR 2SC2412K-R
Q4006 405 021 2307 TR 2SD1048-X6
or 405 021 2406 TR 2SD1048-X7
Q4007 405 157 6507 TR XP151A13A0M
Q4008 405 157 6507 TR XP151A13A0M
Q4009 405 005 5508 TR 2SA812-M6
or 405 002 0308 TR 2SA1037K-R
or 405 134 5905 TR 2SA1037AK-R
or 405 146 1704 TR KTA1504-Y
or 405 146 9700 TR KTA1504-GR
Q4010 405 141 4403 TR DTC124EKA
or 405 149 6109 TR KRC103S
Q4011 405 141 4403 TR DTC124EKA
or 405 149 6109 TR KRC103S
Q4902 405 064 6300 TR 2SB1295-6
or 405 064 6409 TR 2SB1295-7
Q4903 405 149 6109 TR KRC103S
or 405 141 4403 TR DTC124EKA
S4001 645 059 8012 SWITCH,PUSH,R/P SW
or 620 199 9839 SWITCH,PUSH,4-2,R/P SW
S4002 645 057 0056 SWITCH,SLIDE 2P-2T,2.4/4.8 SW
S4003 645 026 2630 SWITCH,SLIDE 2P-3T,PLAYSPEEDSW
S4004 645 057 2470 SWITCH,SLIDE,PAUSESW
S4005 645 026 2623 SWITCH,SLIDE 1P-2T,VASSW
VR401 645 057 0032 VR,ROTARY 10KBX2,VOL
VR471 645 026 5495 VR,SEMI,1K S,SPEED VR

- 5 -
WIRING DIAGRAM (SWITCH)
This is a basic wiring diagram.
PARTS SIDE VIEW
PATTERN SIDE VIEW
LED
CUE
GND
3V
DICT
CONF
1AD4B10D1720B
94V-0 F01
DICT CONF
INDEX
14
58
S4200
R4201
CAN4200
S4201
D4200 IC420
R4204
C4200
R4203 R4202
R4205
C4201
1AD4B10D1720B
94V-0 F01

- 7 -- 6 -
IC401 IC402
R4705
C4705
C4706
R4704
R4707
R4706
R4711
C4708
S4005
C4710
C4711R4714
R4713
R4712
C4713R4715
R4708 C4707 R4709
C4703
C4702
R4710
C4701
R4703
C4720
C4721 C4722
C4723
C4725
C4724
R4720
R4719
C4730
D4701
S4004
R4723
R4014
R4012
R4013
VR471
R4727
R4728
R4805C4805
C4806
R4804
R4807 R4806
R4808 C4807
R4811
R4814C4811
R4813
R4812
C4810
C4815
C4816
R4817
C4813
R4815
C4814R4816
C4715
C4716
C4714R4716
R4809
C4803
C4802 C4801
R4803
C4820
C4821 C4822
C4823
C4824
C4825
R4820
C4828
R4823
D4901
R4819
C4830
D4801
R4810
CN401
CN405
C4030
R4717
C4727
CN403
C4709 C4809
IC404
IC403
IC405
Q4001
Q4002
R4023
R4022
Q4003
R4025
Q4004
R4024
R4026
R4027
R4028 R4029
Q4005 Q4006
R4030
R4031
R4718
R4730
R4032
R4033
IC406
R4830
R4818
R4021
R4034
S4003
R4701
Q4007 R4011
R4801
R4015
C4726 C4826
C4831
IC407
R4035
C4031
IC408
C4731
VR401
R4043
R4044
C4842
C4841
R4841
D4001
S4001
S4002
CN402
C4804
C4808
IC409
R4045
Q4008
R4010
D4002 D4003
Q4009
R4001
R4002
Q4011 Q4010
R4003 R4004
R4753
R4901
C4850
C4851
C4750
R4752
R4853
C4901
C4812
C4751
CN491
D4921
C4704
Q4903
Q4902
R4908
D4200
S4200
R4201
S4201
IC420
R4202
R4203
R4204 R4205
C4200
C4201
LA4167M LA4167M
27K
4700P
0.047;B
56
5.6K
18K
470K
47;6.3-T
0.47
0.4718K
560K
1M
0.11
4.7K
0.1 6.8K
0.015
8200P
10K
47;6.3-T
680
3900P
4700P 0.1
47;6.3-T
220;4
220;4
6.8K
3.3K
0.022
UDZS10B
120K
10K
3.3K
1K
1K
560
470
27K4700P
0.047
56
5.6K 18K
4.7K
0.1
470K
18K0.47
560K
1M
0.47
0.01
1000P
4.7K
0.1
1
0.11
0.01
1000P
0.11
6.8K
0.015
8200P
47;6.3-T
680
3900P
4700P 0.1
47/4
220;4
220;4
6.8K
0.1
120K
UDZS10B
3.3K
0.022
UDZS10B
10K
MIC 1
220/4
4.7K
0.1
1.0 1.0
TC7SB66FU
TC7WB66FK
TC7WB66FK
TC7WB66FK
TC7WB66FK
C2412K
C2412K
2.2K
2.2K
C2412K
10K
C2412K
10K
8.2K 680
10K
10K
C2412K
D1048
5.6K 130
2.2K
1K
10K
910
TC7SB66FU
1K
2.2K
10K
10K
39
XP151A13A0MR 100K
39
4.7K
22/6.3 22/6.3
0.1
TC7SB66FU
120K
470/4
TC7SB66FU
0.1
10K
10K
100K
100K
2.2
2.2
470K
DAN202K
MIC 2
4.7/25
47/4
TC7WB66FK
100K
XP151A13A0MR
100K
1SS355 1SS355
KTA1504
470K
47K
KRC103S KRC103S
4.7K 4.7K
0
1.5K
0.01
0.01
0.01
1K
0
220/4
47;6.3-T
0.01
RB161M
4.7
KRC103S
2SB1295
47K
POWER
180
CUE-INDEX
TC7WB66FK
100K
100K
2.2K 2.2K
0.1
0.1
123456789101112131415
302928272625242322212019181716
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
1
2
3
5
4
123
54
45
321
123
54
1234
8765
1234
8765
S4001:RECORD/PLAY SW
S4002:TAPE SPEED SW
S4003:PLAY SPEED SW
S4004:PAUSE SW
S4200:REC MODE SW
S4201:CUE-INDEX SW
S4005:VAS SW
PLAY REC
PLAY
REC
FAST
NOR
OFF ON
4.8
2.4
PLAY REC
REC PLAY
4.82.4
-1
-1
S4001-2
S4002-2
S4001-3
S4001-4
POWER SW
PRE-GND
EQ-IN
MIC-IN
VREF-OUT
MIC-VCC
AF-OUT
LED-DRIVE
R/P-SW
PAUSE
R/P-MUTE
GVN-CONT
GVN-VREF
VS
GVN-GND
GVN-OUT
VCC
POWER-OUT2
POWER GND
POWER-OUT1
POWER-IN
CUE TONE OUT
CUE TONE OSC
CUE TONE ON/OFF
VOX-DELAY
VOX-CONT
ALC-CONT
REC-OUT
REC-IN
PRE-OUT
PRE-NF
REMOTE
HEAD PHONE
(B2)
(B2)
(B2)
(B2)
-1 VR401-2
IN
OUT
GND
CE
VDD
-1
-2
-1
-2
SLOW
1
2
6
3
4
5
6
3
5 7
21
65
3
7
12
12345678
DICT CONF 3V GND CUE-INDEX LED
1
2
6
3
4
5
5
4
3
6
2
1
PRE-GND
EQ-IN
MIC-IN
VREF-OUT
MIC-VCC
AF-OUT
LED-DRIVE
R/P-SW
PAUSE
R/P-MUTE
GVN-CONT
GVN-VREF
VS
GVN-GND
GVN-OUT
VCC
POWER-OUT2
POWER GND
POWER-OUT1
POWER-IN
CUE TONE OUT
CUE TONE OSC
CUE TONE ON/OFF
VOX-DELAY
VOX-CONT
ALC-CONT
REC-OUT
REC-IN
PRE-OUT
PRE-NF
L-CH
R-CH
(R-CH)
(L-CH)
CE VDD
GND
OUT
IN
(R-CH)
(L-CH)
GND
CE
OUT
VDDIN
IN
VDD
OUT
CE
GND
GVN
PAUSE
R/PR.F
2
1
MIC
VCC
VREF
CUE-TONE
VOX
VOX
ALC
REC
RX
2K
RXRX
20K
300K
RX
EQ
51.5dB
MIC
GVN
PAUSE
R/PR.F
2
1
MIC
VCC
VREF
CUE-TONE
VOX
VOX
ALC
REC
RX
2K
RXRX
20K
300K
RX
EQ
51.5dB
MIC
-1 S4200-2
CONF DIC
DICT CONF
3V
CUE-INDEX
LED
12345678
2
3
1
4
6
5
DICT CONF
(L-CH) (R-CH)
SP
GND
MIC41 MIC42
1.7
VAS
0.2
1.4
0
0
1.5
1.6
1.6
0
0
1.6
1.6
1.6
1.2
0
1.2
3.0
0
2.8
1.3
0.2
0.7
1.2
1.6
2.7
1.6
1.6
1.6
1.6
2.7
0
1.6
1.7
VAS
0.2
1.4
0
0
1.5
1.6
1.6
0
0
1.6
1.6
1.6
1.2
0
1.2
3.0
0
2.8
1.3
0.2
0.7
1.2
1.6
2.7
1.6
1.6
1.6
1.6
2.7
0
1.6
This is a basic schematic diagram.
SCHEMATIC DIAGRAM (AMPLIFIER)

- 9 -- 8 -
VAS SW
ON
4.8
2.4
PAUSE SW
+
1AD4B10D1720A
94V-0 F01
ON
OFF
14
58
14
58
6
OFF
14
58
+
VR401
S4005
C4825
C4823
CN401
CN402
S4003
CN405
C4724
C4725
CN403
C4824
MIC1
MIC2
H.P
C4826
C4030
C4031
SLOW
FAST
NOR
C4726
S4004
CN491
C4804 C4808
S4001
C4901
S4002
R4013
Q4006
R4033 R4032
R4031
R4030
Q4005
R4029
R4028
R4026
Q4003
R4027
Q4004
R4025
R4024
Q4002
R4023
Q4001
R4022
D4001
C4816
R4808
R4717
R4817
IC404
IC406
C4830
D4801
C4801
CAN4712
R4701
Q4007
R4015
R4021
R4034
R4011
R4801
IC407
R4820
R4035
IC408
R4720
IC403
IC405
R4841 C4841
C4842
CAN4703
CAN4722
CAN4802
CAN4821
CAN4803
CAN4822
CAN4818
CAN4718
R4718
R4730
IC409
R4045
Q4008
R4010
D4002
D4003
R4004
R4003
CAN4817
C4812
R4753
R4044
D4701
C4704
R4704
CAN004
CAN003
CAN006
CAN005
Q4903
CAN4951
CAN4952
CAN4954
CAN4953
11015
162030
11015
162030
+
LEDCUE GND
3V
CONF
DICT
SP+
SP-
+
MOTOR+
MOTOR-
+
+
HEAD-B+
HEAD-A+
MIC-1+
MIC-2+
P.SW
P.SW
HEAD-B-
1AD4B10D1720A
94V-0 F01
+
BATT+
BATT-
HEAD-A-
MIC1_GND
MIC2_GND
ON OFF
4.82.4
FAST SLOW
NOR
VAS
OFF ON
PAUSE
TAPE-SPEED
HP MIC2 MIC1
IC401
IC402
C4707
R4706 R4705 C4705
C4706
R4707
R4711
C4708
C4709
C4711 R4714
C4710 R4712 C4715
R4713
C4714
R4716
C4713
R4715
R4727
R4728
C4720 C4722 C4721
C4723
C4727
R4723 R4014
R4012
R4709 R4710 C4702
C4703
C4701
R4703
R4708
C4716
R4805
C4805 C4806
R4804
R4807
R4806
CAN4808
C4809
R4811
C4807
R4809
R4803
C4803 R4810
C4802
R4814
C4811
R4813
R4812
C4810
C4815
C4820 C4828 C4821 C4822
R4823
R4815C4813
C4814 R4816
R4719
R4819
D4901
CAN4827
CAN4828
R4818
R4830
VR471
CAN4826
C4731
C4831
R4043
CAN4702
CAN4721
CAN4717
Q4009 Q4010 Q4011
R4001 R4002
CAN4700
CAN4750
CAN4751
CAN4705
CAN4800
CAN4901
CAN4900
CAN4903
CAN4905
CAN4902
CAN4907
CAN4904
CAN4906
CAN4850
CAN4805
CAN4851
R4752
CAN4706
CAN4753
R4853
R4901
C4751 C4851
C4750
C4850
CAN4752
CAN4852
CAN007
CAN001
CAN002
C4730
D4921
Q4902
R4908
This is a basic wiring diagram.
WIRING DIAGRAM (AMPLIFIER) PARTS SIDE VIEW PATTERN SIDE VIEW
SANYO Electric Co., Ltd.
Osaka, Japan
Apr. / '03 BB Printed in Japan