8.ELECTRICAL PARTS LIST ............................... 22
In this set, the S102 (POWER) detects REC/PLAYBACK on.
It is mounted on the MAIN board, and therefore the REC/PLAYBACK on cannot be detected with the MAIN board removed.
When making an operation check and voltage check of mechanical deck with the MAIN board removed, fix the S102 at turn on.
– MAIN BOARD (Conductor Side) –
S102
on
Flexible Circuit Board Repairing
• Keep the temperature of the soldering iron around 270 ˚C during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be damaged by heat.
– 2 –
Page 3
• Location of Controls
r
p
SPEED CONTROL
0
9
REW/REVIEW
)
FF/CUE
PAUSE
REC
STOP
PLAY
c
VOL
EAR
MIC
SECTION 2
GENERAL
TAPE COUNTER
Flat mic
Micropohone plat
REC TIME
VOR
BATT/REC/
i
This section is extracted from
instruction manual.
DC IN 3 V
– 3 –
Page 4
• This set can be disassembled in the order shown below.
• Switch and control position
VOL contorl (RV401): mechanical center
PAUSE switch (S105): OFF
SPEED CONTROL (RV605): center click
VOR switch (S104): OFF
Test T ape
TypeSignal Used for
P-4-A0636.3 kHz, –10 dBhead azimuth adjustment
WS-48A3 kHz, 0 dBtape speed adjustment
0 dB=0.775 V
Record/Playback Head Azimuth Adjustment
Mode: playback
test tape
P-4-A063
(6.3 kHz, –10 dB)
set
32
level mete
Ω
+
–
EAR jack (J101)
Procedure:
1. Turn the adjustment screw to obtain the maximum reading on
level meter.
Note: Several peaks may appear, but take the maximum.
2. After the adjustment, lock the adjustment screw with suitable
locking compound.
Adjustment Location:
adjustment screw
Press the
button.
(
Tape Speed Adjustment
Mode: playback
test tape
WS-48A
(3 kHz, 0 dB)
32
set
EAR jack (J101)
frequency
counter
Ω
+
–
Procedure:
1. Set [RECTIME] switch (S601) to NORMAL (4.8 cm/s) posi-
tion, and playback the tape (WS-48A) .
2. Adjust R V604 so that frequenc y counter reading becomes 3,040
Hz.
Specification values: 3,030 to 3,050 Hz
3. Set [RECTIME] switch (S601) to DOUBLE (2.4 cm/s) position.
4. Playback the tape from the beginning for two minutes, then
adjust R V606 so that frequency counter reading becomes 1,540
Hz.
Specification values: 1,535 to 1,545 Hz
Confirm that deflection of the frequency counter reading between
the beginning and the end of tape is within 0.5% (NORMAL:
approx. 15.2 Hz, DOUBLE: approx. 7.6 Hz) .
Adjustment Location:
– MAIN BOARD (Conductor Side) –
J101
Tape Speed Adjustment
RV604
Tape Speed Adjustment
(Normal Speed)
RV606
(Double Speed)
6-1.BLOCK DIAGRAM
MIC101
(MIC)
J102
MIC
(PLUG IN POWER)
S101
(REC/PB)
PB
REC
HRP901
(REC/PB)
HE901
(ERASE)
S101 (1/6)
M901
(CAPSTAN/REEL)
WV
Q101
AGC
CONTROL
S101 (4/6)
VREF
U
MOTOR BRAKE
SWITCH
Q603, 604
MOTOR BRAKE
CONTROL SWITCH
Q601, 602
D602
15
20
1
2
MIC IN
28
EQ IN
29
ALC
CONT
5
REC OUT
4
COMPARATOR
OUT
UOUT
VOUT
WOUT
MIC AMP, REC/PB EQ AMP
IC101 (1/2)
MIC
AMP
EQ
AMP
ALC
REC
AMP
IN+
13
+
VSP
–
14
SPEED
CONTROL
MOTOR
DRIVE
CIRCUIT
SWITCH &
LOGIC
CIRCUIT
REC IN
RV605
SPEED
CONTROL
RV605
PRE
OUT
PRE
NF
CIRCUIT
2
1
3
S101 (6/6)
(REC/PB)
REC
TH602
S101 (6/6)
OSC
OSC
7
Q104
PB EQ
SWITCH
NF
REC EQ
SWITCH
PB
VREF
REFERENCE
VOLTAGE
CAPSTAN/REEL
MOTOR DRIVE
IC601
Q103
BIAS
12
VREF
+
REC B+
THP606
RV604
S/S
VCC
REC B+
RV606
11
18
VOR LOW
SWITCH
Q402
S601
REC TIME
DOUBLE
NORMAL
RV604, 606
TAPE SPEED
BATTERY B+
RV101
VOL
REC B+
BUFFER
Q102
VOR ON
SWITCH
Q403
S401
VOR
HL
MOTOR CONTROL
SWITCH
Q605
REC B+
OFF
REC B+
PB B+
VREF
REFERENCE VOLTAGE
S101 (2/6)
(REC/PB)
PB
REC
VOR OFF
SWITCH
REC B+
POWER ON B+
S101 (5/6)
(REC/PB)
MUTE SWITCH
Q107, 108
Q401
PB
REC
POWER AMP, VOR CONTROL,
REGULATOR, CAPSTAN/REEL MOTOR DRIVE
POW IN
11
VOR
DELAY
7
R/P
SW
23
GVN OUT
16
GVN VREF
19
GVN CONT
20
MIC
VCC
26
VREF
27
REC/PB
REGULATOR
REFERENCE
VOLTAGE
GENERATOR
VOX
IC101 (2/2)
POWER
AMP
MOTOR
DRIVER
POW OUT 1
POW OUT 2
PAUSE
MUTE
RIPPLE
FILTER
VOLTAGE DETECT
IC501
LED
DRIVE
PAUSE
MUTE
12
14
24
22
21
VCC
VOICE
MIRROR
Q503
D603
15
Q404
SWITCHING
Q502
MUTE SWITCH
PB B+
PB B+
MUTE
SWITCH
Q109, 110
POWER ON B+
S101 (3/6)
(REC/PB)
PB
REC
D503
BATT ••
S105
PAUSE c
OFF
ON
POWER ON B+
D502
BATT • /REC
REC B+
PB B+
S102
(POWER)
BATTERY B+
• SIGNAL PATH
Q106
REC/PB
MONITOR LEVEL
SWITCHING
: PLAY
: RECORD
SP901
(SPEAKER)
J101
EAR
PB B+
DRY BATTERY
(IEC DESIGNATION R6)
–
SIZE “AA”
2PCS. 3V
CN101
DC IN 3V
+
VCC
D501
05
i
LED DRIVE
Q501
OUT
BOOSTER
4
CIRCUIT
COMPARATOR
7
VS
6
– 7 –
– 8 –
– 9 –
Page 8
Page 9
6-3.SCHEMATIC DIAGRAM• See page 17 for IC Block Diagrams.
TCM-40DV
– 13 –
– 14 –
– 15 –
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and 1/
specified.
• C : panel designation.
• U : B+ Line.
• H : adjustment for repair.
• Total current is measured with no cassette installed.
• Power voltage is dc 3 V and fed with regulated dc power
supply from external power voltage jack.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : PLAY
<> :RECORD
• Voltages are taken with a V OM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production tolerances.
• Signal path.
E: PLAY
a : RECORD
4
W or less unless otherwise
– 16 –
Page 10
SECTION 7
EXPLODED VIEWS
• IC Block Diagrams
IC101 LA4168ML-TE-L
PRE GND
EQ IN
MIC IN
2.2k
+
–
EQ
300k
1
PRE NF
2
PRE OUT
+
–
MIC
3
REC IN
30k
+
4
Vref OUT
2k
–
20k
REC
REC OUT
MIC VCC
5
ALC CONT
R, F OUT
ALC
6
VOX CONT
LED DRIVER/P SW
VOX
SPEED
VOX
7
VOX DELAY
PAUSE
MIC
VCC
+
–
Vref
8
GNV SPEED UP
PAUSE
21222324252627282930
9
10
AUT STOP CONT
P/R MUTE
11
AUT STOP IN
GVN CONT
PWR IN
GVN Vref
1
12
PWR OUT1
181920
R/P
R, F
POWER
13
Vs
PWR GND
GVN GND
17
GVN
2
14
PWR OUT2
16
15
GVN OUT
Vcc
IC601 LB1877V-TLM
VOUT
1
2
WOUT
3
PGND
WB
4
VB
5
6
UB
OSC
COM
GND
7
8
9
R1
10
OSC
CIRCUIT
STARTING
DETECT
PRE DRIVER
SOFT SWITCH
COMMUNICATION
STARTING LOGIC
WAVEFORM DETECT
SPEED
CONTROL
CURRENT
CONTROL
DIRECTION
CONTROL
OUTPUT
BIAS
SPEED CONTROL
REFERENCE VOLTAGE
REFERENCE
VOLTAGE
–
+
COMPARATOR
POWER
SUPPLY
BIAS
NOTE:
• -XX and -X mean standardized parts, so they
may have some difference from the original
20
UOUT
19
DR
VCC
18
17
LB
16
FC
one.
• Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
↑↑
Parts Color Cabinet's Color
15
OUT
VSP
14
IN+
13
(1)CABINET SECTION
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
• The mechanical parts with no reference number in the exploded views are not supplied.
• Accessories and packing materials are given
in the last of the electrical parts list.
563-936-409-01 BUTTON (STOP) (p)
571-548-582-11 COUNTER, TAPE (SMALL TYPE)
583-924-625-01 LEVER (HEAD)
593-924-645-01 BRACKET (HEAD)
603-924-685-01 SPRING (AZIMUTH), COMPRESSION
613-704-197-31 SCREW (IB LOCK)
623-375-135-01 SCREW (1.4), SPECIAL
633-376-177-01 SCREW (M1.4X3.8)
643-925-107-01 SPRING (IDLER), COMPRESSION
653-924-637-01 GEAR (FF)
663-924-673-01 GEAR (S REEL)
76
81
Ref. No.Part No.DescriptionRemark
673-924-674-01 SPRING (B. T), COMPRESSION
683-924-641-01 GEAR (T REEL)
693-936-582-03 SPRING (GROUND), TORSION
703-924-681-01 BELT (CAPSTAN)
711-649-600-11 MOTOR FLEXIBLE BOARD
723-376-407-01 SCREW (M1.4) (MOTOR)
733-034-903-01 SPRING (POWER TENSION), TENSION
743-348-160-11 SCREW (M1.4X1.6), PRECISION PAN
753-018-522-01 COUNTER, BRACKET
763-924-675-01 PULLEY (COUNTER)
773-924-683-01 BELT (COUNTER)
783-376-407-01 SCREW (M1.4)
803-561-685-01 SHEET (C), INSULATING
814-969-980-21 SCREW (IB LOCK)
HRP901 1-500-073-51 HEAD, MAGNETIC (RECORD/PLAYBACK)
M9011-698-875-11 MOTOR, DC (CAPSTAN/REEL) (WITH PULLEY)
– 17 –
– 18 –
– 19 –
– 20 –
Page 11
(3)MECHANISM DECK SECTION-2
(MT-40-118)
109
107
108
113
112
111110
101
116
114
127
117
not
supplied
132
119
121
115
106
105
104
103
102
102
130
101
129
131
Ref. No.Part No.DescriptionRemark
1013-321-483-11 RING, RETAINING (0.25)
1023-701-437-51 WASHER
103X-3372-171-1 FLYWHEEL ASSY
1043-924-623-01 LEVER (PLAY)
1053-924-621-01 LEVER (REW)
118
120
123
122
124
133
not
supplied
HE901
126
128
125
Ref. No.Part No.DescriptionRemark
1183-035-368-01 SPRING (PR2), TORSION
1193-924-684-01 SPRING (LOCK PLATE), TENSION
1203-924-619-01 LEVER (SW)
1213-924-639-01 LEVER (CR)
1223-924-618-01 LEVER (LOCK)
1063-924-620-01 LEVER (FF)
107X-3370-388-1 TABLE ASSY, FELT
1083-924-642-01 SPRING (FR), TORSION
1093-924-629-01 LEVER (DETECTION)
1103-925-207-01 SPRING (SHUT. OFF), TENSION
1113-924-630-01 LEVER (S. OFF)
112X-3370-387-1 LEVER ASSY, IDLER
1133-924-682-01 BELT (FR)
114X-3370-385-1 PULLEY (FR) ASSY
1153-924-628-01 LEVER (FR)
1163-924-633-01 SPRING (STOP), TENSION
1173-924-622-01 LEVER (STOP)
1233-925-208-01 SPRING (REC), TENSION
1243-924-624-01 LEVER (REC)
125X-3377-249-3 CHASSIS SUB ASSY
1263-924-613-01 GEAR (FR)
1273-024-378-21 SPRING (FR LEVER), TORSION
R1011-216-065-00 RES, CHIP4.7K5%1/10W
R1021-216-049-11 RES, CHIP1K5%1/10W
R1031-216-069-00 METAL CHIP6.8K5%1/10W
R1041-216-073-00 METAL CHIP10K5%1/10W
R1051-216-061-00 METAL CHIP3.3K5%1/10W
R1061-216-061-00 METAL CHIP3.3K5%1/10W
R1081-216-085-00 METAL CHIP33K5%1/10W
R1091-216-037-00 METAL CHIP3305%1/10W
R1101-216-037-00 METAL CHIP3305%1/10W
R1111-216-075-00 METAL CHIP12K5%1/10W
Ref. No.Part No.DescriptionRemark
R1121-216-071-00 METAL CHIP8.2K5%1/10W
R1131-216-081-00 METAL CHIP22K5%1/10W
R1141-216-065-00 RES, CHIP4.7K5%1/10W
R1161-216-089-00 RES, CHIP47K5%1/10W
R1171-216-065-00 RES, CHIP4.7K5%1/10W
R1181-216-009-91 RES, CHIP225%1/10W
R1191-216-121-00 RES, CHIP1M5%1/10W
R1221-216-081-00 METAL CHIP22K5%1/10W
R1231-216-061-00 METAL CHIP3.3K5%1/10W
R1301-216-097-91 RES, CHIP100K5%1/10W
R1311-216-059-00 METAL CHIP2.7K5%1/10W
R1321-216-061-00 METAL CHIP3.3K5%1/10W
R1331-216-045-00 METAL CHIP6805%1/10W
R1341-216-061-00 METAL CHIP3.3K5%1/10W
R1361-216-097-91 RES, CHIP100K5%1/10W
R1371-216-073-00 METAL CHIP10K5%1/10W
R1411-216-073-00 METAL CHIP10K5%1/10W
R1421-216-025-00 RES, CHIP1005%1/10W
R1431-216-057-00 METAL CHIP2.2K5%1/10W
R4011-216-065-00 RES, CHIP4.7K5%1/10W
R4021-216-105-00 RES, CHIP220K5%1/10W
R4031-216-097-91 RES, CHIP100K5%1/10W
R4041-216-105-00 RES, CHIP220K5%1/10W
R5011-216-107-00 METAL CHIP270K5%1/10W
R5021-216-103-00 METAL CHIP180K5%1/10W
R5031-216-081-00 METAL CHIP22K5%1/10W
R5041-216-083-00 METAL CHIP27K5%1/10W
R5051-216-033-00 METAL CHIP2205%1/10W
R5061-216-037-00 METAL CHIP3305%1/10W
R5071-216-051-00 METAL CHIP1.2K5%1/10W
R5081-216-037-00 METAL CHIP3305%1/10W
R5091-216-045-00 METAL CHIP6805%1/10W
R5101-216-041-00 METAL CHIP4705%1/10W
R5111-216-075-00 METAL CHIP12K5%1/10W
R5121-216-081-00 METAL CHIP22K5%1/10W
R5131-216-009-91 RES, CHIP225%1/10W
R5141-216-021-00 METAL CHIP685%1/10W
R6111-216-061-00 METAL CHIP3.3K5%1/10W
R6121-216-121-00 RES, CHIP1M5%1/10W
R6131-216-121-00 RES, CHIP1M5%1/10W
R6141-216-121-00 RES, CHIP1M5%1/10W
R6151-216-085-00 METAL CHIP33K5%1/10W
R6161-216-069-00 METAL CHIP6.8K5%1/10W
R6171-216-085-00 METAL CHIP33K5%1/10W
R6181-216-085-00 METAL CHIP33K5%1/10W