Sony XR-C750 Service Manual ▷ View online
– 25 –
Adjustment Location : tuner unit (TU11)
–set upper view–
TU11
RV1 AM (MW) AUTO SCAN/STOP LEVEL ADJ
RV4 FM STEREO SEPARATION ADJ
TAPE SPEED
ADJ
RV261
(R-CH)
RV251
(L-CH)
(L-CH)
DOLBY
LEVEL
ADJ
–set bottom view–
TP (DOLBY)
DOLBY
LEVEL
ADJ
DOLBY
LEVEL
ADJ
R-CH
L-CH
L-CH
RV2 FM AUTO SCAN/STOP LEVEL ADJ
RV3 FM NOISE FOCUS ADJ (E MODEL)
– 26 –
6-1. IC PIN DESCRIPTIONS
• IC101 µPD78013GC-761-AB8 (TUNER SYSTEM CONTROL)
• IC101 µPD78013GC-761-AB8 (TUNER SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
TUNON
O
TUNER power control output
2
FM ON
O
FM power control output
3 – 8
NCO
—
Not used.
9
VSS
—
GND
10 – 23
NCO
—
Not used.
24
VSS
—
GND
25 – 32
NCO
—
Not used.
33
TUNMUTE
O
Tuner mute output
34
RAMBU
I
RAM reset detection input
35
RESET
—
Microcomputer reset
36
NCO
—
Not used.
37
BU IN
I
Back-up power detection input
38
NCO
—
Not used.
39
BUSON
I
BUS ON control input
40
VDD
—
Microcomputer power supply
41
OSCOUT
O
System clock connection output (8 MHz)
42
OSCIN
I
System clock connection input (8 MHz)
43
GND
—
GND
44
XT OUT
O
Sub clock connection output (Connect to GND.)
45
XT IN
I
Sub clock connection input (Connect to GND.)
46
AVSS
—
GND for A/D input.
47
VSM
I
FM/AM common signal meter A/D conversion input
48, 49
DSTSEL1, 0
I
Destination initial setting A/D conversion input
50
SD IN
I
Station detector detection input
51
ST MONO
I/O
Used inconjunction with STEREO input/MONO output. (FM mode)
52 – 54
NIL
I
Connect to GND.
55
AVDD
—
Power supply for A/D input.
56
AVREF
—
Reference voltage for A/D input.
57
PLLSI
I
PLL serial data input
58
PLLSO
O
PLL serial data output
59
PLLCKO
O
PLL serial clock output
60
PLLCE
O
PLL serial chip enable output
61
LINKOFF
O
LINK OFF output
62
UNISI
I
Serial data input
63
UNISO
O
Serial data output
64
UNICKI
I
Serial clock input
SECTION 6
DIAGRAMS
– 27 –
• IC501 µPD78058GC-463-3B9 (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Pin Description
1
RC IN0
I
Rotary commander A/D conversion input 0
2
ILL.IN
I
Illumination line detection input
3
NIL
I
Connect to GND.
4
AVSS
—
GND for A/D conversion.
5
LCDANG
O
Output for LCD view angle adjustment.
6
NIL
I
Connect to GND.
7
AVREF
—
Reference voltage for D/A conversion.
8
RE IN0
I
Rotary encoder input 0
9
RE IN1
I
Rotary encoder input 1
10
SUB-CONT1
O
SUB.W OUT control output
11
SUB-CONT2
O
SUB.W OUT control output
12
LCDSO
O
LCD serial data output
13
LCDCKO
O
LCD serial clock output
14
LCDCE
O
LCD serial chip enable output
15
LCDINH
O
LCD blank display control output
16
UNISI
I
Serial data input
17
UNISO
O
Serial data output
18
UNICKI
I
Serial clock input
19
UNICKO
O
Serial clock output
20
BUSON
O
BUS ON control output
21
SYSRST
O
System reset control output
22
AMPON
O
Power amplifier power control output
23
—
—
Not used.
24
NCO
—
Not used.
25
PW ON
O
System power control output
26
ILLON
O
Illumination power control output
27
COLOR
I/O
Illumination color select control input/output
28
AMSON
O
TAPE AMS control output
29
REL
I
Rotation detection input of reel table.
30
MTLIN
I
Auto METAL detection input
31, 32
POS3, 2
I
Position signal detection input
33
GND
—
GND of microcomputer.
34, 35
POS0, 1
I
Position signal detection input
36
LM LOD
O
Loading motor control output (Loading direction)
37
LM EJ
O
Loading motor control output (Eject direction)
38
N R OUT
O
Forward/Reverse detection output
39
MTLON
O
METAL control output
40
CM ON
O
Capstan motor control output
41
TAPON
O
TAPE power control output
42
PW SEL
I
Power select initial setting
43
RC IN1
I
Rotary commander input 1
44
TEST
I
TEST mode setting input
45
EQSEL
I
Equalizer select input
46
BEEP
O
Buzzer control output
47
MUTE
O
System mute control output
48
VOLCE
O
Electric volume serial chip enable output
– 28 –
Pin No.
Pin Name
I/O
Pin Description
49
SUBCE
O
Sub volume serial chip enable output
50
VOLCKO
O
Electric volume serial clock output
51
SUBCKO
O
Sub volume serial clock output
52
VOLSO
O
Electric volume serial data output
53
TAPMUT
O
Tape mute control output
54
DOLON
I/O
DOLBY control input/output
55
DOLBC
I/O
DOLBY B/C select control input/output
56
AMSIN
I
Music with/without detection input in AMS.
57
DIMMER
I/O
Dimmer control input/output
58
AD ON
O
Power control output for A/D conversion.
59
TIRIND
O
TIR indicator control output (Not used.)
60
RESET
I
Reset input
61
SIRCS
I
Remote commander input
62
BU IN
I
Back-up power detection input
63
DOORSW
I
Door open/close switch
64
ACCIN
I
Accessory power detection input
65
NOSESW
I
Detachable panel detection
66
TELMUT
I
Telephone mute detection input
67
KEYACK
I
Key input acknowledge
68
VDD
—
Power supply for microcomputer.
69
X OUT
O
Main ceramic oscillator output pin (5 MHz)
70
X IN
I
Main ceramic oscillator input pin (5 MHz)
71
GND
—
GND for microcomputer.
72
XT OUT
O
Sub crystal oscillator output pin (32.768 kHz)
73
XT IN
I
Sub crystal oscillator input pin (32.768 kHz)
74
AVDD
—
Power supply for A/D conversion.
75
AVREF
—
Reference power supply for A/D conversion.
76, 77
KEYIN0, 1
I
Key input 0, 1
78, 79
KEYSEL0, 1
I
Key function select setting input
80
NIL
I
Connect to GND.
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