DOWNLOAD Sony HTC-NX300 / MHC-NX300AV Service Manual ↓ Size: 5.92 MB | Pages: 73 in PDF or view online for FREE

Model
HTC-NX300 MHC-NX300AV
Pages
73
Size
5.92 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
htc-nx300-mhc-nx300av.pdf
Date
PREV: Sony MHC-NX300AV / SS-NX300 Service Manual

Sony HTC-NX300 / MHC-NX300AV Service Manual ▷ View online

34
34
HTC-NX300
7-13. PRINTED  WIRING  BOARD  – AUDIO Board –
•
 See page 25 for Circuit Boards Location.
05
M
(
)
(Page 37)
35
35
HTC-NX300
7-14. SCHEMATIC  DIAGRAM  – AUDIO Board –
•
 See page 46 for IC Block Diagram.
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : TAPE PLAYBACK
(
) : RECORD
PB LEVEL (L)
(DECK A)
PB LEVEL (R)
(DECK A)
PB LEVEL (L)
(DECK B)
PB LEVEL (R)
(DECK B)
PB EQ AMP
(DECK A)
PB EQ AMP
(DECK B)
SWITCHING
REC BIAS (L)
(DECK B)
REC BIAS (R)
(DECK B)
BIAS OSC
REC BIAS
-6.8
(PLAYBACK)
M
NC
A +7.5V
APB–LCH
APB–RCH
AGND
BPB–LCH
BPB–RCH
A –7.5V
–VBIAS (–7.5V)
+VBIAS (+7.5V)
B–REC–RCH
B–REC–LCH
TC–HEAD–GND
(Page 38)
The components identified by mark 
0
 or dotted
line with mark 
0
 are critical for safety.
Replace only with part number specified.
36
36
HTC-NX300
7-15.
PRINTED  WIRING  BOARD  – LEAF SW Board –
•
 See page 25 for Circuit Boards Location.
7-16.
SCHEMATIC  DIAGRAM  – LEAF SW Board –
• Voltages are dc with respect to ground under no-signal
conditions.
no mark : TAPE PLAYBACK
(
) : RECORD
∗
: Impossible to measure
05
DECK A
PLUNGER
DECK B
PLUNGER
(DECK A PLAY)
(DECK A HALF)
(DECK A 120/70)
(DECK A REC)
(DECK B HALF)
(DECK B PLAY)
(DECK B 120/70)
(DECK B REC)
21
21
N
4
1
2
3
4
1
2
3
(
)
DECK B
PLUNGER
DECK A
PLUNGER
(CAPSTAN)
(DECK A 120/70)
(DECK A HALF)
(DECK A REC)
(DECK B HALF)
(DECK B REC)
(DECK B 120/70)
ROTATION DETECT SENSOR
(DECK A)
ROTATION DETECT
SENSOR (DECK B)
(DECK A PLAY)
(DECK B PLAY)
N
CONTROL SWITCH
CAPM–
CAPM+
CAPM–H/L
A–TRGM
TRGM–GND
B–TRGM
A–SHUT
DGND
A–HALF
+5V
A–120/70
B–SHUT
A PLAY
B–HALF / REC–A / REC–B
B–120/70
B PALY
NC
(Page 37)
(Page 38)
37
37
HTC-NX300
7-17.
PRINTED  WIRING  BOARD  – MAIN Board –
•
 See page 25 for Circuit Boards Location.
D903
E-1
D904
E-2
IC101
D-6
IC102
B-5
IC107
D-1
IC301
B-8
IC851
B-3
Q101
C-4
Q103
B-2
Ref. No.
Location
Ref. No.
Location
D101
D-8
D102
D-7
D103
D-8
D104
D-8
D105
B-5
D107
A-5
D852
B-3
D855
A-5
D858
A-6
D901
D-2
D902
D-1
• Semiconductor Location
Q104
C-2
Q105
C-4
Q106
D-5
Q107
D-5
Q331
E-8
Q332
E-7
Q333
E-8
Q334
E-7
Q335
D-7
Q336
D-8
Q337
D-8
Q338
D-8
Q339
D-7
Q340
D-8
Q341
D-8
Q342
D-8
Q343
D-7
Q852
A-4
Q855
A-5
Ref. No.
Location
Ref. No.
Location
(Page 40)
(Page 40)
(Page
40)
(Page
40)
(Page 42)
(Page
40)
(Page 34)
(Page 36)
(Page 32)
(Page 42)
(Page 42)
(Page 32)
(Page 30)
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