Sony TCM-40DV, Service Manual

Page: 7 / 14

TCM-40DV
– 7 – – 8 – – 9 –
6-1. BLOCK DIAGRAM
SECTION 6
DIAGRAMS
SECTION 5
ELECTRICAL ADJUSTMENTS
MIC AMP, REC/PB EQ AMP
IC101 (1/2)
POWER AMP, VOR CONTROL,
REGULATOR, CAPSTAN/REEL MOTOR DRIVE
IC101 (2/2)
VOLTAGE DETECT
IC501
05
•
SIGNAL PATH
: PLAY
: RECORD
TH602
RV605
GVN VREF
GVN OUT
OUT
VREF
MIC
VCC
Q106
REC/PB
MONITOR LEVEL
SWITCHING
SP901
(SPEAKER)
POW OUT 1
POW OUT 2
POW IN
REC B+
REC B+
REC B+
REC B+
REC B+
REC B+
PB B+
POWER ON B+
POWER ON B+
POWER ON B+
BATTERY B+
BATTERY B+
PB B+
REC B+
PB B+
PRE
OUT
PRE
NF
MIC IN
EQ IN
REC OUT
VREF
VREF
VREF
S102
(POWER)
S101 (4/6)
S101 (1/6)
HRP901
(REC/PB)
HE901
(ERASE)
Q101
AGC
CONTROL
MIC101
(MIC)
19
16
4
27
26
12
14
LED
DRIVE
24
PAUSE
D603
22
MUTE
VCC
21
15
VCC
7
VS
6
11
VOR
DELAY
7
R/P
SW
23
1
REC IN
3
2
29
4
ALC
CONT
5
28
J102
MIC
(PLUG IN POWER)
RV101
VOL
J101
EAR
MIC
AMP
EQ
AMP
POWER
AMP
VOX
REC/PB
PAUSE
MUTE
RIPPLE
FILTER
COMPARATOR
BOOSTER
CIRCUIT
REFERENCE
VOLTAGE
GENERATOR
REFERENCE VOLTAGE
MUTE SWITCH
Q107, 108
LED DRIVE
Q501
REGULATOR
MOTOR
DRIVER
REC
AMP
ALC
VOR LOW
SWITCH
Q402
MOTOR CONTROL
SWITCH
Q605
MOTOR BRAKE
SWITCH
Q603, 604
MOTOR BRAKE
CONTROL SWITCH
Q601, 602
VOR ON
SWITCH
Q403
BUFFER
Q102
VOICE
MIRROR
Q503
MUTE
SWITCH
Q109, 110
NF
Q103
REC EQ
SWITCH
Q104
PB EQ
SWITCH
S101
(REC/PB)
PB
REC
S101 (6/6)
(REC/PB)
PB
REC
S101 (6/6)
S101 (2/6)
(REC/PB)
PB
REC
S101 (5/6)
(REC/PB)
PB
REC
REC TIME
S601
DOUBLE
NORMAL
OFF
ON
S101 (3/6)
(REC/PB)
PB
REC
+
PB B+
Q502
MUTE SWITCH
Q404
SWITCHING
Q401
VOR OFF
SWITCH
PB B+
PAUSE c
S105
BATT
• •
D503
BATT
•
/REC
D502
i
D501
OFF H L
VOR
S401
DRY BATTERY
SIZE “AA”
(IEC DESIGNATION R6)
2PCS. 3V
CN101
DC IN 3V
–
+
GVN CONT
20
RV604
TAPE SPEED
RV604, 606
SPEED
CONTROL
RV605
D602
18
W V
U
+
–
SPEED
CONTROL
CAPSTAN/REEL
MOTOR DRIVE
IC601
M901
(CAPSTAN/REEL)
MOTOR
DRIVE
CIRCUIT
SWITCH &
LOGIC
CIRCUIT
BIAS
REFERENCE
VOLTAGE
OSC
CIRCUIT
THP606
S/S
VCC
VREF
IN+
COMPARATOR
VSP
OUT
OSC
11
12
7
13
14
15
WOUT
2
VOUT
1
UOUT
20
RV606
Tape Speed Adjustment
Mode: playback
Procedure:
1. Set
[REC TIME]
switch (S601) to NORMAL (4.8 cm/s) posi-
tion, and playback the tape (WS-48A) .
2. Adjust RV604 so that frequency counter reading becomes 3,040
Hz.
Specification values: 3,030 to 3,050 Hz
3. Set [REC TIME] switch (S601) to DOUBLE (2.4 cm/s) posi-
tion.
4. Playback the tape from the beginning for two minutes, then
adjust RV606 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) –
Setting:
• Supplied voltage: 2.5 V
• Switch and control position
VOL contorl (RV401) : mechanical center
PAUSE switch (S105) : OFF
SPEED CONTROL (RV605) : center click
VOR switch (S104)
: OFF
Test Tape
Record/Playback Head Azimuth Adjustment
Mode: playback
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:
0 dB=0.775 V
Type Signal Used for
P-4-A063 6.3 kHz, –10 dB head azimuth adjustment
WS-48A 3 kHz, 0 dB tape speed adjustment
level meter
test tape
P-4-A063
(6.3 kHz, –10 dB)
32
Ω
set
EAR jack (J101)
+
–
frequency
counter
test tape
WS-48A
(3 kHz, 0 dB)
32
Ω
EAR jack (J101)
set
+
–
J101
RV606
Tape Speed Adjustment
(Double Speed)
RV604
Tape Speed Adjustment
(Normal Speed)
adjustment screw
Press the
(
button.