Sony CDC-Z137 Service Manual ▷ View online
13
CDC-Z137
2-15. MOTOR (SLED) SUB ASSY
1
P 1.7x2
2
motor (sled) sub assy
2-16. PICK-UP SUB ASSY
1
B 1.4x5
2
leaf spring
3
pick-up sub assy
15
CDC-Z137
3-1. IC PIN DESCRIPTIONS
• IC202 LC78622NE (DIGITAL SIGNAL PROCESSOR) (SERVO BOARD)
Pin No.
Pin Name
I/O
Pin Description
1
DEFI
I
Defect detection signal (DEF) input (Must be connected to 0 V when unused.)
2
TAI
I
Test input pin A pull-down resister is built-in. Must be connected to 0 V.
3
PDO
O
External VCO control phase comparator output
4
VVSS
—
Internal VCO ground pin Must be connected to 0 V.
5
ISET
—
PDO output current adjustment resister connection pin
6
VVDD
—
Internal VCO power supply pin
7
FR
—
VCO frequency range adjustment
8
VSS
—
Digital system ground pin Must be connected to 0 V.
9
EFMO
O
EFM signal output
10
EFMIN
I
EFM signal input
11
TEST2
I
Test input pin A pull-down resister is built-in. Must be connected to 0 V.
12
CLV+
O
Disc motor control signal output
13
CLV–
O
Can be set to three-value output by microprocessor command.
14
V/P
O
Rough servo/phase control automatic switching monitor output
Outputs a high level during rough servo a low level.
15
HFL
I
Track detection signal input This is a schmitt input.
16
TES
I
Tracking error signal input This is a schmitt input.
17
TOFF
O
Tracking off signal output
18
TGL
O
Tracking gain switching signal output Increase the gain when low.
19
JP+
O
Track jump control signal output
20
JP–
O
Three-value output is also possible when specified by microprocessor command.
21
PCK
O
EFM data playback clock monitor signal output
Output pin 4.3218 MHz when the phase is locked. Not used. (Open)
Synchronization signal detection signal output
22
FSEQ
O
Output a high level when the Synchronization signal detected from the EFM signal
and the internaly generated synchronization signal range. Not used. (Open)
23
VDD
—
Digital system power supply pin
24
CONT1
I/O
General-purpose input/output 1 – 5
25
CONT2
I/O
Controlled by serial data commands from the microprocessor.
26
CONT3
I/O
Any of these that are unused must be either set up as input pin ports and connected to
27
CONT4
I/O
0 V, or set up as output pin ports and left open.
28
CONT5
I/O
Not used. (Open)
De-emphasis monitor signal output
29
EMPH
O
A high level indicates playback of a de-emphasis disc.
General-purpose input/output pin 6. Not used. (Open)
30
C2F
O
C2 flag output pin Not used. (Open)
31
DOUT
O
Digital out signal output (EIJA format) Not used. (Open)
32
TEST3
I
Test input pin A pull-down resister is built-in. Must be connected to 0 V.
33
TEST4
I
Test input pin A pull-down resister is built-in. Must be connected to 0 V.
General-purpose input/output command identifying pin
A pull-down resister is built-in. Must be connected to 0 V when used with functions
34
PCCL
I
similar to those of LC78622E.
H: Control possible only for the general-purpose input/output port command.
L: Control possible for all commands.
35
LMUTE
O
Left channel mute signal output General-purpose input/output pin 7
36
LVDD
—
Left channel power supply pin
37
LOUT
O
Left channel output
38
LVSS
—
Left channel ground pin Must be connected to 0 V.
39
RVSS
—
Right channel ground pin Must be connected to 0 V.
40
ROUT
O
Right channel output
41
RVDD
—
Right channel power supply pin
SECTION 3
DIAGRAMS
16
CDC-Z137
Pin No.
Pin Name
I/O
Pin Description
42
RMUTE
O
Right channel mute signal output General-purpose input/output pin 8
43
XVDD
—
Crystal oscillator power supply pin
44
XOUT
O
Connections for a 16.9344 MHz crystal oscillator element pin
45
XIN
I
46
XVSS
—
Crystal oscillator ground pin Must be connected to 0 V.
47
SBSY
O
Subcode clock synchronization signal output Not used. (Open)
48
EFLG
O
C1, C2, signal and double error correction monitor pin Not used. (Open)
49
PW
O
Subcode P, Q, R, S, T, U and W output Not used. (Open)
50
SFSY
O
Subcode frame synchronization signal output
This signal falls when the subcode are in standby stase. Not used. (Open)
51
SBCK
I
Subcode readout clock input
This is a schmitt input. (Must be connected to 0 V when unused.)
52
FSX
O
Output pin for the 7.35 kHz synchronization signal divided from the crystal oscillator
Not used. (Open)
53
WRQ
O
Subcode Q output standby output
54
RWC
I
Read/write control signal input This is a schmitt input
55
SQOUT
O
Subcode Q signal output
56
COIN
I
Command input pin from system control microprocessor
57
CQCK
I
Input for both the command input acquisition clock and the SQOUT pin subcode
readout clock input pin This is a schmitt input.
58
RES
I
Reset signal input This pin must be set low briefly after power is first applied.
59
TST11
O
Test output pin Leave open. (Normally output a low level.) Not used. (Open)
60
16M
O
16.9344 MHz output pin Not used. (Open)
61
4.2M
O
4.2336 MHz output pin
62
TEST5
I
Test input pin A pull-down resister is built-in. Must be connected to 0 V.
63
CS
I
Chip select signal input
A pull-down resister is built-in. Must be connected to 0 V if not controlled.
64
TEST1
I
Test input pin No pull-down resister. Must be connected to 0 V.
17
CDC-Z137
• IC901 LC72358N-9B50 (SYSTEM CONTROL) (MAIN BOARD)
Pin No.
Pin Name
I/O
Pin Description
1
XIN
I
System clock oscillator input (4.5 MHz)
2
TEST2
—
Not used. (Open)
3
CD DATA IN
—
Not used. (Open)
4
NC
—
Not used. (Open)
5
NC
—
Not used.
6
E-VOL DO
O
Date output for volume level control
7
LCD DI
I
LCD driver date signal input
8
LCD DO
O
LCD driver date signal output
9
LCD CLO
O
LCD driver clock signal output
10
LCD CE
O
LCD driver CE signal output
11
SQ OUT
I
Sub-code Q input terminal
12
COIN
O
Command output terminal for DSP
13
CQCK
O
Transfer-out clock for command output or output terminal for sub-code transfer
clock from SQ OUT
14
SD/ST
I
Stereo signal input when receiving “H”=MONO, “L”=ST FM reception.
Channel detection signal input when FM/AM seeking “H”=detect channel.
15
LOC/DX
O
LOC/DX switching output when in the radio seek mode “H”=LOC, “L”=DX.
16
IF REQ
O
IF count signal request output
17
NC
—
FM/AM power switch output “H”=AM, “L”=FM Not used. (Open)
18
TU ON
O
Radio power switch output “H”=Radio mode Not used. (Open)
19
NC
—
Not used. (Open)
20
E-VOL CE
O
CE output for volume level control
21
ACC CONT
—
Not used. (Open)
22, 23
KS4, KS3
O
Initial setting diode matrix output Not used. (Open)
24 – 26
KS2 – KS0
O
Initial setting diode matrix output
27, 28
K3, K2
I
Initial setting diode matrix input
29
K1
I
Initial setting diode matrix input CD test mode, pulled down when not used.
30
K0
I
Initial setting diode matrix input
31
VDD
—
Power supply pin
32
E-VOL CLO
O
Clock output for volume level control
33
LM SW
O
Loading or SLED GAIN switch output
34
NC
—
Not used. (Open)
35
FEM+ LM+
O
Sled motor control terminal
36
FEM– LM–
O
Sled motor control terminal
37
RW
O
RW disc control output Normal set to “H”.
38
LP UP
O
RW disc control output Normal set to “L”.
39
CD ON
O
CD power switch output
40
A-MUTE
O
Audio mute signal output
41
POWER CONT
O
Power control signal output
42
ST-BY MUTE
O
ST-BY mute signal output
43
POWER MUTE
O
Power mute signal output
44
BEEP
O
BEEP output (3 kHz, 50 ms)
45
DFP IN
I
Front panel detection signal input
46
DRF
I
“Detect RF” RF level detection input Pulled up when not used.
47
WRQ
I
Sub-code Q output standby input terminal
48
RWC
O
Read/write control output terminal
49
CD RES
O
DSP reset output terminal
50
OPEN
—
Not used. (Open)
51
SW2
I
12 cm disc detection/12 cm disc ejection and detection
52
SW1
I
Leading motor start detection
53
R-ENCOD2
I
Rotary encoder input 2
54
R-ENCOD1
I
Rotary encoder input 1
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