Schematic Diagram - Main Board (1/3) - Sony MHC-RG270 Service Manual

6-12. SCHEMATIC DIAGRAM – MAIN Board (1/3) –
(1/3)
CN991
19P
VF1
VF2
-VFL
D-GND
D-GND
VDD(EVER)
VDD(SWITCHED)
STBY-LED
VOL-A
VOL-B
KEY
(Page 46)
SIRCS
VFD-RESET R996 100
VFD-DO R999 100
VFD-DI
VFD-CLK R998 100
VFD-CE R997 100
9V
M-GND
R365 R363 R359 R357
10k 1k 10k 1k
CN341
13P
R369 R361 R355
22k 22k 22k
D-GND
REC(REW)
B-SOL
R367
22k
B-MODE
B-HALF
TAPE MECHANISM
B-PHOTO
DECK BLOCK
REC(FWD)
SUPPLIED WITH
CAPM+
THE ASSEMBLED
BLOCK A-HALF
M-GND
A-PHOTO
A-SOL
A-MODE
Q342
KTA1273
-Y-AT
Q344
KTA1271Y
-AT
Q346
KTA1271Y
-AT
D341
MC2836 RT1N431C
Q341,342
CAPSTAN/REEL MOTOR DRIVE
Q343,344
PLUNGER DRIVE(DECK-B)
Q345,346
PLUNGER DRIVE(DECK-A)
HCD-GX355/GX555/RG270/RG475/RG575
• See page 50 for Waveforms. • See page 60 for IC Pin Function Description.
VF1
VF2
VFL-
STBY
V-A
V-B
KEY
RMC
R245
10k
VRE
VDO
VDI
VCL
VCE I-HP/AUDIO
I-MIC
D4
D3
D5
D7
D6
D1
D2
O-RP
O-BI
TA-AMS
V-2
V-1
PROTECT
R936
KEY
D1
R366 R364 R360 R358
10k 1k 10k 1k
D2
R370 R362 R356
22k 22k 22k
R354 4.7k
R368
22k
R353 4.7k
R352 4.7k
D3
R351 47k
R350 4.7k
R349 4.7k
D4
R348 47k
R347 4.7k
R341 Q341
10k RT1N431C
-TP-1
R342
1k
D5
R343
10k
Q343
RT1N431C
-TP-1
R344
1k
D6
R345
10k
R346
1k
Q345 D7
-TP-1
(Page 34)
R1971 10k (AEP,UK,EE,E2,E51,AR)
R1972 10k (US,CND,AEP,UK,EE,RU,E2,E51,AR)
R1973 10k (AEP,UK,EE,RU,EA,MX)
R1974 10k (EXCEPT E3,EA,AUS,SP)
R1976 10k (GX555,RG475)
R1977 10k (GX355,RG270)
R953 10k
R958 10k
R971 10k (US,CND,RU,E3,EA,MX,AUS,SP)
R972 10k (E3,EA,MX,AUS,SP)
R973 10k (US,CND,E2,E3,E51,AR,AUS,SP)
R974 10k (E3,EA,AUS,SP)
R975 10k
R976 10k (GX355/RG270/RG575)
R977 10k (GX555/RG475/RG575)
I-MODEL7
C928 1000p
R924 100 I-HP/
AUDIO IN
R923 100
I-MIC
R981 100
I-REAL-A
R982 100
I-REAL-B
O-MOTOR
O-A-SOL
O-B-SOL
I-TAPE-A-STAT
SYSTEM CONTROLLER
I-TAPE-B-STAT
IC901
M30302MCP
O-REC/PB
-A02FPU0
O-BIAS
R920 100
I-TAPE-AMS
I-STREAM
R921 1M
I-VACS
R922 220k
I-PROTECTOR
22k C918 1000p
AVSS
R913 1k
I-POWER,DISPLAY
C923 0.1
VREF
C925 0.1
AVCC
NC
C912 220p
C919 0.1
C927 22p
C914 22p
X901
32.768KHz
X902
16MHz
C970
1000p
C917
0.1 R914
C916
1000
6.3V
R910
10k
R909
22k
R907 C908
47k 0.1
Q901
2SC3052
RESET C909
0.1
SWITCH
R908
47k
33 33
HCD-GX355/GX555/RG270/RG475/RG575
(MX)
R969
100
G-3
(AEP,UK,EE)
R911
100
R-D
O-TM-F
R957 100 C-TR
O-TM-R
R956 100 C-LF
O-LM-F
R955 100 C-LR
O-LM-R
C-2
O-XRST
R940 10k
xWR
C-4
O-XLT
C-10
O-MP3-LP
R939 100 C-14
I-MP3-REQ
C-15
O-MP3-STB
R938 10k
xHOLD
R927 100 C-13
I-MP3-ACK
C-9
O-MP3-CS
C-8
O-MP3-RESET
VCL
O-VFD-CLK
R925 100 VDI
I-VFD-DATA
VDO
O-VFD-DATA
C-1
O-XTCN
C-5
O-CD-CLK
R928 100 C-6
I-CD-SENS
C-3
O-CD-DATA
O-MP3
-DATA R950
4.7k
R926
100
C911
1000p
Q902
2SC3052
INVERTER
100
Q933
RT1N431C
-TP-1
AMP
R932
2.2k ON/OFF
Q903
KTA1271Y-AT
D902
D905 MC2836
1SS355TE-17
Q903,904
R903
REGULATOR 10k
R901
Q904 100k
2SC3052 R912
IC902
1k
PST3429UL
VOLTAGE R905
10k
DETECT
D903 R902
1SS355TE R904 0
-17 1k
C902 D901
C904 C906 C901
10 UDZSTE
0.1 10 100
50V -174.7B
50V 16V
Ver. 1.1
R949
10k
D947
D943
1SS355TE
MC2838
-17
R946
0
A4
R948
2.2k R941
2.2k
D923
A3
MC2840
(Page 34)
R942
10k
C922 C921
D921
4.7 2.2
MC2840 R943
50V 50V
4.7k
R947
R944
220k
R951 R945 220k
220 220
B2
(Page 35)
B3
B4
B5
B6
B7