Sony XR-C540RDS Service Manual ▷ View online
– 35 –
6-5. IC PIN FUNCTION DESCRIPTION
• MAIN BOARD IC501 MN1886426S4H (SYSTEM CONTROLLER)
Pin No. Pin Name I/O Function
1 TUNMUT O Tuner muting control pin
At muting: “H”
2 AMPON O Power amp power supply control pin
3 ILLON O
Illumination power supply control pin
At PW SEL on: ACC on: “H”
At PW SEL off: Power on: “H”
At PW SEL on: ACC on: “H”
At PW SEL off: Power on: “H”
4 PW_ON O System power supply control pin
5 AMPMUT O Power amp muting control pin At muting: “L”
6 RCIN1 I Rotary remote commander input pin (A/D input)
7 VDD – Power supply
8 X_IN I Main system clock input pin (8 MHz)
9 X_OUT O Main system clock output pin (8 MHz)
10 GND – GND
11 XT_IN I Sub system clock input pin (32.768 kHz)
12 XT_OUT O Sub system clock output pin (32.768 kHz)
13 EX2 – Connected to GND
14 RESET I Reset input pin
15 RDSCKI I RDS clock input pin
16 BU_IN I Back up power supply detection pin
17 KEYACK O Key acknowledge signal input pin
18 VOLSO O Data output pin to electrical volume
19 VOLCKO O Clock output pin to electrical volume
20 VOLCE O Chip enable output pin to electrical volume
21 TAPEMUT O Tape muting control pin At muting: “H”
22 LMLOD O Loading motor control pin (loadig direction)
23 LMEJ O Loading motor control pin (eject direction)
24 AMSON O At AMS: “L”
25 N_ROUT O Forward/reverse control pin
26 AMSIN I Tape music with/without detection pin
“L”: with music
27 PLLSO O PLL data output pin
28 PLLCKO O PLL clock output pin
29 PLLCE O PLL chip enable output pin
30 RDSSI I RDS data input pin
31 AD_ON O Power supply control pin for A/D conversion
32 DOLON I/O
DOLBY control input/output pin
At initial mode: valid/invalid selection input of DOLBY function
At normal mode: DOLBY on/off output
At initial mode: valid/invalid selection input of DOLBY function
At normal mode: DOLBY on/off output
33 MTLON I/O
METAL control input/output pin (Fixed at “H” in this set)
At initial mode: valid/invalid selection input of METAL function
At normal mode: METAL on/off output
At initial mode: valid/invalid selection input of METAL function
At normal mode: METAL on/off output
“H” : on
34 CMON O Capstan motor control pin
35 TAPON O Tape power supply control pin
36 ACCON I Accessory voltage detection pin
37 PLLSI I PLL data input pin
– 36 –
Pin No.
Pin Name
I/O
Function
38
BEEP
O
Beep sound output pin
39
LCDCKO
O
LCD clock output pin
40
LCDSO
O
LCD data output pin
41
LCDINH
O
LCD brank indication control pin
42
LCDCE
O
LCD chip enable output pin
43
UNICKO
O
Clock output pin (for SONY BUS)
44
UNICI
I
Clock input pin (for SONY BUS)
45
UNISI
I
Data input pin (for SONY BUS)
46
UNISO
O
Data output pin (for SONY BUS)
47
VDD
–
Power supply
48
AVDD
–
Power supply
49
AVREF+
–
A/D reference voltage input pin
50,51 KEYIN1,KEYIN0
I
Key input pin (A/D input)
52
D-BASS
I
D-BASS switch input pin (A/D input)
53
KEYSEL
I
Key function setting pin (A/D input)
54
DSTSEL
I
Destination setting pin (A/D input)
55
RCIN0
I
Rotary remote commander input pin (A/D input)
56
VSM1
I
FM/AM multi-pass detection pin (Fixed at “L” in this set)
57
VSM0
I
FM/AM signal meter voltage detection pin (A/D input)
58
AVREF-
–
A/D reference voltage input pin (connected to GND in this set)
59
AVSS
–
GND
60
GND
–
GND
61
BUSON
O
BUS ON control signai output pin (for SONY BUS)
62
SYSRST
O
System reset signal output pin (for SONY BUS)
63
SEKOUT
O
SEEK control signal output pin
64
TUNON
O
Tuner power supply control pin
65
FM_ON
O
FM power supply control pin
66
MUT
O
System muting control pin
At muting: “H”
67
AF_SEK
O
AF seek control signal output pin
Not used (Open)
68
COLOR
I
Illumination color setting pin
“L” : amber, “H”: green
Not used (Open)
69
NOSESW
I
Front panel removal or attaching detection pin
70
STIN
I/O
Stereo detection signal input and forced monaural signal output pin
71
SDIN
I
Station detection signal input pin
72
REL_T
I
Reel table rotation detection pin
73-76
POS3-POS0
I
Tape position detection pin
77
PW_SEL
I
Power select switch input pin
78
TELMUTE
I
Telephone muting detection pin
“L”: 20dB audio muting (Fixed at “H” in this set)
79
TEST
I
Test mode setting pin
80
ILLIN
I
ILLIN signal detection pin (Fixed at “L” in this set)
– 37 –
NOTE:
•
-XX and -X mean standardized parts, so they
may have some difference from the original
one.
may have some difference from the original
one.
•
Color Indication of Appearance Parts
Example:
KNOB, BALANCE (WHITE) . . . (RED)
Example:
KNOB, BALANCE (WHITE) . . . (RED)
↑
↑
Parts Color
Cabinet's Color
•
Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
are seldom required for routine service. Some
delay should be anticipated when ordering
these items.
•
The mechanical parts with no reference num-
ber in the exploded views are not supplied.
ber in the exploded views are not supplied.
•
Hardware (# mark) list and accessories and
packing materials are given in the last of the
electrical parts list.
packing materials are given in the last of the
electrical parts list.
SECTION 7
EXPLODED VIEWS
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
1
3-009-294-01 PANEL, SUB
2
3-935-003-01 SPRING, TORSION
3
3-932-205-11 DOOR, CASSETTE
4
X-3367-636-1 LOCK ASSY
* 5
3-009-306-01 SHEET, INSULATING
* 6
A-3309-819-A MAIN BOARD, COMPLETE (German)
* 6
A-3309-820-A MAIN BOARD, COMPLETE (AEP, UK)
7
3-915-923-01 SCREW, GROUND POINT
* 8
X-3373-269-1 COVER ASSY (ISO)
9
1-777-989-21 CORD (WITH CONNECTOR) (AMP REM)
* 10
3-009-307-01 BRACKET (IC)
* 11
3-009-293-01 HEAT SINK
12
9-911-840-XX CUSHION (U)
* 13
3-009-813-01 CHASSIS
14
3-937-650-01 PLATE (C), GROUND
* 15
A-3309-740-A POWER BOARD, COMPLETE
16
1-782-092-11 CORD (WITH CONNECTOR) (POWER)
17
1-782-093-11 CORD (WITH CONNECTOR) (SPEAKER)
* 18
3-012-859-01 CAP, RUBBER (25)
* 19
3-012-105-01 BRACKET (HS)
F901
1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) (10A)
(1) CHASSIS SECTION
#3
MG-25B-136
#2
#2
#2
#1
F901
8
14
7
6
5
4
3
2
1
13
12
11
#2
#2
#2
#2
10
Front panel ass’y
18
9
16
17
15
19
– 38 –
(2) FRONT PANEL SECTION
51
3-010-396-01 KNOB (D-BASS)
53
3-010-398-01 BUTTON (RELEASE)
54
3-010-395-01 SPRING (RELEASE)
55
X-3373-670-1 PANEL SUB ASSY
56
3-010-383-01 BUTTON (SOURCE)
57
3-010-384-01 BUTTON (M. O. S)
(
r. OFF. –. = 0. SEEK AMS. + ) +)
58
3-010-385-01 BUTTON (S. M. +/–) (–. SEL. +. MUTE. SENS)
59
3-010-387-01 BUTTON (PRESET)(
6. 1. 2. 3. 4. 5. 6. DSPL)
60
3-010-388-01 BUTTON (P. A. D) (PTY. AF/TA. – DISC +)
* 61
3-010-375-01 SHEET (REFLECTOR)
* 62
3-010-393-01 PLATE (LCD), LIGHT GUIDE
* 63
3-010-394-01 HOLDER (LCD)
64
3-010-382-01 PANEL, FRONT BACK
LCD901 1-801-587-11 DISPLAY PANEL, LIQUID CRYSTAL
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
53
51
58
57
59
56
54
55
60
LCD901
61
63
62
#5
#5
64
not supplied
(KEY board)
(KEY board)
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