Sony TC-KE240 / TC-RE340 Service Manual ▷ View online
25
25
TC-KE240/RE340
7-9.
SCHEMATIC DIAGRAM – DISPLAY Board –
•
See page 17 for Waveform.
•
See page 27 for IC Block Diagram.
(Page 20)
26
26
TC-KE240/RE340
7-10. PRINTED WIRING BOARDS – KEY/HP Boards –
•
See page 16 for Circuit Boards Location.
7-11. SCHEMATIC DIAGRAM – KEY Board –
(Page 19)
(Page 19)
(Page 20)
27
• IC Block Diagrams
IC304
MC14052BCP
IC902
M35500BGP
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
2X0
X2
VDD
X1
XCOM
X0
X3
A
B
VSS
VEE
INH
2X1
2X3
2XCOM
2X2
33
34
35
33
33
33
33
33
33
33
43
44
2
1
3
4
36
37
38
39
40
41
42
32 31 30 29 28 27 26
25 24 23
22
21
20
19
18
17
16
15
14
13
12
DIGITAL/SEGMENT
OUTPUT CIRCUIT
DISPLAY CONTROL
CIRCUIT
DISPLAY
RAM
MEMORY
ADDRESS
TRIGGER
SERIAL
I/O
TRANSFER
COUNTER
MODE
REGISTER
DIG4
DIG5
DIG6
DIG7
DIG8/SEG17
DIG9/SEG16
DIG10/SEG15
DIG11/SEG14
DIG12/SEG13
DIG13/SEG12
DIG14/SEG11
DIG15/SEG10
DIG3
DIG2
DIG2
DIG1
DIG0
VEE
VEE
SCLK
SOUT
SIN
SOUT
SIN
CS
DIGITAL
OUTPUT CIRCUIT
COMMAND
ANALYTIC CIRCUIT
A-D
CONVERTER
CLOCK
GENERATOR
NOISE FILTER
NOISE FILTER
6 7 8 9 10 11
DIG16/SEG9
DIG17/SEG8
DIG17/SEG8
SEG7
SEG6
SEG5
SEG5
SEG4
SEG3
SEG2
SEG2
SEG1
SEG0
SEG0
VDD
VDD
XOUT
VSS
XIN
5
RESET
AN5
AN4
AN3
AN2
AN1
AN0
SELECTOR/A-D
CONTROL CIRCUIT
28
7-12.
IC PIN FUNCTION DESCRIPTION
• MAIN BOARD IC801 CXP82220-053Q (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
PLAYSW B
I
Mechanism playback detect switch (S1002) input terminal “H”: playback
2
70U B
I
CrO
2
detect switch (S1008) input terminal “H”: CrO
2
3
METAL
I
Metal detect switch (S1007) input terminal “H”: metal
4
SIRCS IN
I
SIRCS signal input from the remote control receiver (IC901)
5
POWER IN
I
AC in detect signal input terminal “H”: AC in
6
VOL OUT
O
Record level control signal output to the CXA1878Q (IC301)
7
A/B SEL
I
Deck select (A/B) signal input terminal “L”: A deck “H”: B deck Not used (open)
8
CONTROL-A IN
I
SIRCS remote control signal input of the CONTROL A1
9
CONTROL-A OUT
O
SIRCS remote control signal output of the CONTROL A1
10
FLCLK
O
Serial data transfer clock signal output to the M35500BGP (IC902)
11
FLDATA IN
I
Serial data input to the M35500BGP (IC902)
12
FLDATA OUT
O
Serial data output to the M35500BGP (IC902)
13
CS
O
Chip select signal output to the M35500BGP (IC902)
14
REC MUTE A
O
Record muting on/off control signal output terminal “L”: muting on Not used (open)
15
REC/PB
O
Recording/playback control signal output to the CXA1878Q (IC301)
“L”: playback, “H”: recording
“L”: playback, “H”: recording
16
RECCAL 0
O
17
RECCAL 1
O
18
GPCAL 0
O
19
GPCAL 1
O
20
RECCAL 0
O
21
RECCAL 1
O
22
GPCAL 0
O
Equalizer calibration up/down control signal output terminal
“L”: down, “H”: up (high impedance: off) Not used (open)
“L”: down, “H”: up (high impedance: off) Not used (open)
23
FILTER
O
Multiplex filter on/off control signal output “H”: multiplex filter on
24
REC MUTE B
O
Record muting on/off control signal output to the CXA1878Q (IC301) “L”: muting on
25
CAL OFF
O
Calibration on/off control signal output to the CXA1878Q (IC301) “H”: calibration on
(TC-RE340 only) TC-KE240: Not used
(TC-RE340 only) TC-KE240: Not used
26
C/B/OFF
O
Dolby B and C type selection signal output to the CXA1878Q (IC301)
“L”: Dolby C, center voltage: Dolby B, “H”: NR off
“L”: Dolby C, center voltage: Dolby B, “H”: NR off
27
REC EQ HN
O
Recording equalizer select signal output terminal Not used (open)
28
PASS/MUTE/NR
O
Audio select signal output to the CXA1878Q (IC301)
“L”: NR on, center voltage: muting, “H”: pass
“L”: NR on, center voltage: muting, “H”: pass
29
BS/AMS/OFF
O
Mode select signal output for AMS/BS amplifier to the CXA1878Q (IC301)
“L”: BS mode, center voltage: AMS mode, “H”: AMS/BS off mode
“L”: BS mode, center voltage: AMS mode, “H”: AMS/BS off mode
30
RELAY B
O
Recording/playback switching relay (RY341) control signal output terminal
“L”: recording, “H”: playback
“L”: recording, “H”: playback
31
RELAY A
O
Recording/playback switching relay control signal output terminal
“L”: recording, “H”: playback Not used (open)
“L”: recording, “H”: playback Not used (open)
32
METER L
I
Signal input for the level meter drive (L-ch) from the CXA1878Q (IC301) (A/D input)
33
METER R
I
Signal input for the level meter drive (R-ch) from the CXA1878Q (IC301) (A/D input)
34
HALF
I
Detection input from the cassette detect switch (S1006)
“L”: no cassette, “H”: cassette in
“L”: no cassette, “H”: cassette in
35
SHUT
I
Rotation detect signal input of the capstan motor (M1002)
36
KEY2
I
Key input terminal (A/D input) (S911 to S916) m, M, REC z, FADER, ARL, SYNCHRO
keys input
keys input
Equalizer calibration up/down control signal output to the CXA1878Q (IC301)
“L”: down, “H”: up (high impedance: off) (TC-RE340 only) TC-KE240: Not used (open)
“L”: down, “H”: up (high impedance: off) (TC-RE340 only) TC-KE240: Not used (open)
Recording calibration up/down control signal output to the CXA1878Q (IC301)
“L”: down, “H”: up (high impedance: off) (TC-RE340 only) TC-KE240: Not used (open)
“L”: down, “H”: up (high impedance: off) (TC-RE340 only) TC-KE240: Not used (open)
Recording calibration up/down control signal output terminal
“L”: down, “H”: up (high impedance: off) Not used (open)
“L”: down, “H”: up (high impedance: off) Not used (open)
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