DOWNLOAD Sharp RT-XV300H Service Manual ↓ Size: 1.31 MB | Pages: 24 in PDF or view online for FREE

Model
RT-XV300H
Pages
24
Size
1.31 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio / System
File
rt-xv300h.pdf
Date
PREV: Sharp RT MODELS (serv.man3) Service Manual

Sharp RT-XV300H Service Manual ▷ View online

RT-XV300H
– 5 –
ADJUSTMENT
Adjusting the deck circuit
Figure 5-2 ADJUSTMENT POINTS
MECHANISM SECTION
• Driving Force Check
• Checking the bias oscillation frequency
—
     85 
±
7kHZ
TP101  1   or   3
Adjusting object
Set value
Connection
Play: TW-2412
80 g or more
Reverse Play: TW-2422
80 g or more
Specified Value
Torque Meter
• Checking the playback/FF/rewinding torque
Torque Meter
Specified Value
Play: TW-2111
25 to 65 g. cm
Reverse Play: TW-2121
25 to 65 g.cm
Fast forward: TW-2231
60 to 130 g.cm
Rewind: TW-2231
60 to 130 g.cm
• Adjusting the record/playback head azimuth
* Raise the cassette holder cover and remove it , and then
adjust the azimuth.
MTT - 114
Output: L: TP102 1    R: TP102  4
Connection
Test Tepe
• Checking the bias current
L: VR105
Standard: 15 
±
 3 mV
L: TP101  1
R: VR106
R: TP101  3
Adjusting object
Set value
Connection
MTT-150
L: VR101
Standard: 580mV
L:TP102  1
R: VR102
R: TP102  4
Connection
• Adjusting the playback amplifier sensitivity
Connection
Set value
Test Tape
• Adjusting the record/playback amplifier sensitivity
UR-121
Record level control
200mV
Input:AUX
(1kHz)
L: VR103
200mV
Output:
R: VR104
L: TP102  1
R: TP102  4
Connection
Set value
Connection
Test Tape
Figure 5-1 BIAS CURRENT
1
VR101
L-ch
P. B. AMP.SENS.
VR103
VR104
VR105 VR106
TP101
TP102
VR102
2
3
4
3
2
1
MAIN PWB
L-ch
BIAS
R-ch
BIAS
R-ch
P. B. AMP.SENS.
L-ch
REC. AMP.SENS.
R-ch
REC. AMP.SENS.
L-ch
GND
GND
R-ch
L-ch
GND
R-ch
Unit
Record mode
1
3
Electronic voltmeter
560k
Ω
560
Ω
GND (TP101pin       )
2
TP101 pin       or pin
RT-XV300H
– 6 –
Figure 6  BLOCK DIAGRAM (1/2)
33
4
1
7
15
22
9
30
26
16
15
28
2
34
3
9
4
2
8
6
5
1
3
14
24
13
12
25
9
28
23
22
18
30
7
26
11
29
8
ERASE HEAD
P/B
RECORD/PLAYBACK
HEAD
IC102
BA3126N
HEAD
SELECTOR
BIAS
ADJUSTMENT
VR105
VR106
REC
R/P
SELECTOR
A+12V
EQUALIZER AMP.
IC101
M51167BFP
M
TAPE MOTOR
M251
Q129
MOTOR
DRIVER
M+10V
Q130
WAVE FROM
SHAPING
Q131
SOLENOID
DRIVER
PH401
PHOTE
INTERRUPTER
CrO
2 
SELECTOR
Q122,Q126
+5V
BIAS SELECTOR
CONTROL
Q136
BIAS OSC.
A+12V
A+12V
RECORD/
PLAYBACK
SELECTOR
Q127
Q128
Q153
Q154
Q138
APSS
CONTROL
IC103
NA12142NT
DOLBY NR
VR103
VR104
REC.AMP.
SENS.
DOLBYR/P
B/C/OFF
DOLBY NR
A+12V
MUTE
Q115
Q116
MUTE
CONTROL
Q151
Q152
SOL401
SOLENOID
SW403
TAPE MAIN
HALL
ELEMENT
TAPE MECHANISM UNIT
VR101
VR102
APSS
SW406
TAPE METAL
DETECTION
SW402
TAPE SIDE B
ERASE PREVENTION
SW401
TAPE CASSETTE
DETECTION
SW405
TAPE CrO
2
DETECTION
SW404
TAPE SIDE A
ERASE PREVENTION
Q117
Q118
Q119
Q133
Q134
DOLBY SELECTOR
ALC
CONTROL
M+10V
Q137
PBCR
REC
P/B
METAL SELECTOR
Q123,Q125
A+12V
BIAS ON/OFF
Q124
P.B.AMP.
SENS.
PBCR
R/P
APSS
ALC
Q120,Q121
L107
EQUALIZER
SELECTOR
Q101~Q112
–
+
RT-XV300H
– 7 –
Figure 7  BLOCK DIAGRAM (2/2)
15
13
12
11
10
4
2
6
1
14
18
17
21
22
32
31
29
30
23
28
26
27
15
14
20
24
7
5
4
3
2
10
9
8
6
12
25
11
POWER
MICON CONTROL
PLAYBACK SIGNAL
RECORD SIGNAL
MUTE
Q115
Q116
EMITTER
AMP.
Q151
Q152
+5V
M+10V
A+12V
POWER
TRANSFORMER
T101
Q156
Q157
POWER
CONTROL
POWER
CONTROL Q160
SOC101
+5V
DOLBY B/C APSS
IC105
IX0142AW
TAPE
MICROCOMPUTER
X101
6MHz
SW101~SW108
BUTTON
BLOCK
LED BLOCK
LED101~LED109
MD-XV300H
MD-XV300H(BR)
FROM
AMP. UNIT
POWER
CONTROL
Q139
Q140
D114~D117
T.F.
BASIC+B
F101
T800mA L 250V
Q146
Q145
IC104
M5278L05
VOLTAGE
REGULATOR
IC106
NJM78M10FA
VOLTAGE
REGULATOR
7
8
9
3
4
Y SELECTOR
MKEY2
MKEY1
5V
5V
TAPE PLS IN
SOL
MOTOR
CrO
2
 RP
BIAS
REC CNT
DOLBY_C
DOLBY_B
MUTE
X IN
X OUT
KEY1
REV3
REV2
REV1
REC
REV
FWD
T-RDY
T-CLK
T-DATA
T-CMD
RESET
PCNT-IN
Q137
1
Q135
RESET
AC 230V
50Hz
AC POWER
SUPPLY CORD
VOLTAGE
REGULATOR
RT-XV300H
– 8 –
• NOTES ON SCHEMATIC DIAGRAM can be found on page 14.
A
B
C
D
E
F
G
H
1
2
3
4
5
6
Figure 8  SCHEMATIC DIAGRAM (1/2)
CNS106
9.3V
0V
0V
0V
12.7V
12.8V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
0V
(2.7V)
0V
0V
0V
0V
0V
0V
0V
0V
8.4V
0V
1.2V
0V
4V
0V
0V
0V
4.3V
4.3V
0.1V
0V
0V
–
8.9V
0V
0V
0V
0V
0V
0V
0.1V
4.3V
4.3V
0V
0V
0V
4V
0V
1.2V
0V
0V
0V
0V
REC: –3V
0V
0V
5.8V
5.8V
C: –9.7V
B: –5.5V
1.5V
1.5V
5.8V
11.8V
5.8V
0.7V
2V
2V
2V
2V
5.8V
5.8V
5.8V
5.8V
5.8V
5.8V
5.8V
5.8V
5.8V
5.8V
5.8V
5.8V
5.8V
5.8V
5.8V
5.8V
0V
METAL: 5.2V
0V
0V
0.1V
9.4V
9.3V
11.6V
0.2V
0.2V
0V
0.2V
0.2V
0V
11.6V
0V
0V
11.6V
0.2V
11.8V
0.2V
0.2V
0.2V
0.2V
0.2V
0.2V
0.2V
0V
0.1V
0.2V
0V
0V
10V
9.2V
10V
–0.8V
0V
2.5V
9.1V
0V
9V
Q139
Q140
3
2
1
VOLTAGE
NO.
PIN
3
2
1
VOLTAGE
NO.
PIN
Q110
Q109
Q108
Q107
3
2
1
VOLTAGE
NO.
PIN
3
2
1
VOLTAGE
NO.
PIN
3
2
1
VOLTAGE
NO.
PIN
3
2
1
VOLTAGE
NO.
PIN
Q106
Q105
3
2
1
VOLTAGE
NO.
PIN
3
2
1
VOLTAGE
NO.
PIN
Q104
3
2
1
VOLTAGE
NO.
PIN
Q103
3
2
1
VOLTAGE
NO.
PIN
35
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
IC101
4
3
2
1
VOLTAGE
NO.
PIN
26
30
29
28
27
5
4
3
2
1
IC103
VOLTAGE
NO.
PIN
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
6.3V
0V
0V
0V
0V
6.3V
6.3V
6.3V
0V
0V
0V
0V
0.2V
0V
6.3V
0V
0V
0V
0V
0V
8.9V
0V
0V
0V
7.9V
2
3
0.1V
0V
0V
0V
4.3V
5.6V
0V
0V
11.8V
0.1V
C205
0.01(ML)
R201
4.7
R200
4.7
R203
27K
Q121
2SC2001 K
C206
47/16
C201
10/50
BIAS OSC.
+B
R210
15K
R217
56K
R218
2.2K
C214
47/16
D119
1SS119
P/B SW
P/B SW
9
8
7
6
5
4
3
2
1
9
8
7
6
5
4
3
2
1
5
4
4
5
5
2
2
7
7
6
6
1
3
3
REC OUT
REC IN
REV
R2
1
SW
RECORD SIGNAL
PLAYBACK SIGNAL
+B
3
2
1
DOLBY B
REC
DOLBY C
SWITCH A PWB-A4
R252
560
R251
560
R240
1.2K
R236
1K
1
FW106
DOLBY NR
SW101
RECORD/PAUSE
SW102
R245
560
D120
1SS119
LED109
SPR325MV
LED108
SLR325MG
R196
10K
Q155
KRA107 S
LED107
SLR325MG
LED106
SLR325VR
R255
2.7K
+B
R223
10K
D118
1SS119
TAPE MECHANISM PWB-B
SW402
TAPE SIDE B
ERASE PREVENTION
SW405
TAPE CrO
2
DETECTION
SW401
TAPE CASSETTE
DETECTION
SW406
TAPE METAL
DETECTION
SW404
TAPE SIDE A
ERASE PREVENTION
SW403
TAPE MAIN
SOL401
SOLENOID
PHOTE
INTERRUPTER
PH401
I31535CD
4
3
GND
+5V
9
10
11
8
7
6
5
4
3
2
CNP103
1
9
10
11
10
11
8
7
6
5
4
3
2
CNS103
1
9
8
7
6
5
4
3
2
BI103
1
1
2
R235
100K
SOLENOID
DRIVER
3
2
1
WAVE FROM
SHAPING
Q130
KRC107 S
+B
+B
MOTOR
DRIVER
Q129
2SB561 C
+B
POSISTOR
RP101
2.2
3
2
1
3
2
1
METAL
SELECTOR
Q125
KRC104 S
CrO
2
SELECTOR
Q126
KRC104 S
CrO
2
SELECTOR
METAL
SELECTOR
Q123
2SB561 C
BIAS OSC.
RECORD/
PLAYBACK
ERASE HEAD
(58)
R-CH
L-CH
RECORD/PLAYBACK
HEAD
ERASE HEAD
7
6
5
4
3
2
CNS101
1
7
6
5
4
3
2
CNP101
1
L-CH BIAS
R-CH BIAS
+B
HEAD
SELECTOR
IC102
BA3126N
REC OUT
EQUALIZER AMP.
IC101
M51167BFP
+B
+B
Q101~Q112:
EQUALIZER
SELECTOR
3
2
1
RECORD/PLAYBACK
SELECTOR
Q128
KRA107 S
+B
+B
3
2
1
1
ALC CONTROL
+B
3
2
1
+B
+B
3
2
1
3
3
2
2
1
1
3
3
2
2
1
1
3
3
2
2
3
3
2
2
1
1
1
1
R127
3.3K
3
2
1
3
3
2
2
1
1
3
3
2
2
1
1
REVER
S
E
REWIND SW103
FAST
5
LED104 SLR325MG
R247
560
R
5
R250
10K
R241 10K
R242 150K
R243 10K
C122 33/10
OUTPUT
SENSIBLITY
ADJUSTMENT
NOISE FILTER
APSS
EARTH
TIMER
CONSTANT
T1/T2
T1 EQ
T2 EQ
R/P
DUBBING
T1/T2
EQ
FILTER
NC
NC
T2
T1
T2
T1
ALC
C115
0.001
R113
100K
C202
0.01(ML)
C203
0.0047(ML)
L105
15mH
L106
15mH
C177
470P
C175
470P
CONT
REC SW
REC SW
L
R
0.001
C116
C108
10/50
R197
10K
R120
2.7K
R188
22K
C128
0.0047(ML)
C212
0.47/50
REC-Lo
D111
1SS119
METAL
R238
2.7K
R237
1.2K
D110
1SS119
D109
RL104
R233
1.2K
R234
680
C200
0.0082
(PP)
L108
560
µ
H
L107
BIAS
OSCILLATION
R165
10
R166
10
R-CH
L-CH
3
2
TP101
1
–
+
M251
TAPE MOTOR
M
2
CNS102
1
2
CNP102
1
REC BIAS
EQ OUT
EQ OUT
GND
BIAS
70uS
APSS
METAL
REC
REC IN
Cro-Lo
CrO
2
R170
12K
C140
0.47/50
R115
2.2K
C124 0.1/50
R123
6.8K
R124
6.8K
C119
10/50
C120
10/50
R164
15K
R163
15K
R298
10K
R222
560
R131
10K
C210
10/50
C211
47/10
R229 10K
R221 56K
R128 3.3K
R114
220
R187
22K
R248
820
Q112
KRC104 S
Q158
KRC107 S
Q113
KRC104 S
Q114
KRC104 S
R195
47K
R296
10K
R297
4.7K
C127
0.0047
(ML)
C131
0.0082
(ML)
R186
220
R184
100
R185
220
R183
100
C118
10/50
Q111
KRC104 S
R121
220
R122 220
R220 100K
Q127
2SC2412 KR
C240 33/16
R198
10K
Q154
KRC107 S
Q153
KRC107 S
R206
1M
C126
10/50
R116
470K
C125 0.1/50
C123
2.2/50
R182
47K
R181 47K
C204
0.0047
(ML)
C106 0.033 (ML)
C105
0.033
(ML)
C130
0.012
(ML)
C129
0.012
(ML)
C134
0.012
(ML)
C132
0.0082
(ML)
C133
0.012
(ML)
C110
270P
C102 560P
C101 560P
C109
270P
C112
270P
C111
270P
R208
8.2K
270
R209
R133
3.9K
R119
2.7K
R134
3.9K
R207
10K
R239
47K
R291
820
R228
100K
R230
1K
R232
680
R231
1.2K
R102
1K
R101
1K
R118
4.7K
R117
1.5K
R215
560
R214
560
R213
220(1/2W)
R212
180
(1/2W)
R106
6.8K
R211
56K
R105
6.8K
R107
3.9K
R108
3.9K
R104
39
R103
39
C176
470P
C178
470P
C173
560P
C174
560P
C180 150P
C179
150P
R202
27K
Q120
2SC2001 K
L102
6.8mH
Q102
KRC104 S
Q101
KRC104 S
L101
6.8mH
Q110
KRC104 S
Q108
KRC104 S
Q104
KRC104 S
Q106
KRC104 S
Q105
KRC104 S
Q107 KRC104 S
Q103
KRC104 S
Q109
KRC104 S
R111
33K
R112
33K
C117
10/50
C114
1/50
C107
10/50
D107
RL104
D108
RL104
Q124
2SB561 C
BIAS ON/OFF
C215
10/50
Q131
2SB561 C
L109
47
µ
H
R219
3.3K
2.2K
R205
VR106
47K(B)
VR105 47K(B)
C121
220/16
C103
220/10
C104
220/10
C113
1/50
Q122
2SB561 C
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
10 11 12 13 14 15 16 17 18
Page of 24
Display

Click on the first or last page to see other RT-XV300H service manuals if exist.

RANDOM: