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Model
CMT-C5 HCD-C5
Pages
97
Size
13.37 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cmt-c5-hcd-c5.pdf
Date

Sony CMT-C5 / HCD-C5 Service Manual ▷ View online

31
HCD-C5
Reading the Retry Cause Display
Reading the Display:
Convert the hexadecimal display into binary display. If more than two causes, they will be added.
Example
When 42 is displayed:
Higher bit : 4 = 0100 
t b6
Lower bit : 2 = 0010 
t b1
In this case, the retry cause is combined of “CLV unlock” and “ader5”.
When A2 is displayed:
Higher bit : A = 1010 
t b7 + b5
Lower bit : 2 = 0010 
t b1
The retry cause in this case is combined of “Access fault”, “IVR rec error”, and “ader5”.
Hexadecimal
01
02
04
08
10
20
40
80
Hexadecimal
Bit
Binary
Occurring conditions
When track jump (shock) is detected
When ADER was counted more than five times
continuously
When ADIP address is not continuous
When DIN unlock is detected
When not in focus
When ABCD signal level exceeds the specified range
When CLV is unlocked
When access operation is not performed normally
Cause of Retry
shock
ader5
Discontinuous address
DIN unlock
FCS incorrect
IVR rec erraor
CLV unlock
Access fault
Higher Bits
8
4
2
1
8
4
2
1
b7
b6
b5
b4
b3
b2
b1
b0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
0
Lower Bits
Fig. 1 Reading the Test Mode Display
(During recording and stop)
RTs@@c##e
**
fluorescent indicator tube
@@ : Cause of retry
##
: Number of retries
**
: Number of retry errors
Fig. 2 Reading the Test Mode Display
(During playback)
@@ ###
** 
$$
fluorescent indicator tube
@@ : Parts No. (name of area named on TOC)
##
: Cluster
**
: Sector
$$
: Track mode (Track information such as
copyright information of each part)
32
HCD-C5
Reading the Display:
Convert the hexadecimal display into binary display. If more than two causes, they will be added.
Example When 84 is displayed:
Higher bit : 8 = 1000 
t b7
Lower bit : 4 = 0100 
t b2
In this case, as b2 and b7 are 1 and others are 0, it can be determined that the retry cause is combined of “Emphasis OFF”, “Monaural”,
“Original”, “Copyright”, and “Write allowed”.
Example When 07 is displayed:
Higher bit : 0 =  0000 
t All 0
Lower bit : 7 = 0111 
t b0 + b1 + b2
In this case, as b0, b1, and b2 are 1 and others are 0, it can be determined that the retry cause is combined of “Emphasis ON”, “Stereo”,
“Original”, “Copyright”, and “Write prohibited”.
Hexadecimal 
t
 Binary Conversion Table
Hexadecimal
Binary
Hexadecimal
Binary
0
0000
8
1000
1
0001
9
1001
2
0010
A
1010
3
0011
B
1011
4
0100
C
1100
5
0101
D
1101
6
0110
E
1110
7
0111
F
1111
Hexadecimal
01
02
04
08
10
20
40
80
Hexadecimal
Bit
Binary
When 0
Emphasis OFF
Monaural
This is 2-bit display. Normally 01.
01:Normal audio. Others:Invalid
Audio (Normal)
Original
Copyright
Write prohibited
Higher Bit
8
4
2
1
8
4
2
1
b7
b6
b5
b4
b3
b2
b1
b0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
1
0
0
0
0
0
0
0
Lower Bits
When 1
Emphasis ON
Stereo
Invalid
Digital copy
No copyright
Write allowed
Details
Reading the Retry Cause Display
33
HCD-C5
SECTION 5
ELECTRICAL ADJUSTMENTS
CD  SECTION
Note 1:
1. CD Block is basically designed to operate without adjustment. There-
fore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10M
 impedance.
4. Clean the object lens by an applicator with neutral detergent when the
signal level is low than specified value with the following checks.
Note 2:
As the laser diode in the optical pick-up (OPTIMA-720L1E) is easily
damaged by static electricity, solder the laser tap of the flexible
board when handling it. Before disconnecting the connector, solder
first. Before connecting the connector, be careful not to remove the
solder. Also take adequate measures to prevent damage by static
electricity. Handle the flexible board with care as it breaks easily.
RF Level Check
Connection:
Procedure:
1. Connect an oscilloscope to test point TP (RFAC) and TP (DVC
1.65V) on the BD (CD) board.
2. Turn the power on.
3. Put the disc (YEDS-18) in to playback the number five track.
4. Confirm that oscilloscope waveform is clear and check RF sig-
nal level is correct or not.
Note:
A clear RF signal waveform means that the shape “
” can be clearly
distinguished at the center of the waveform.
                    RF signal waveform
Checking Location: BD (CD) board
+
BD (CD) board
TP (RFAC)
TP (DVC 1.65V)
oscilloscope
(AC range)
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
level: 1.1 
±
0.3 Vp-p
pick-up
frexible board
laser tap
Checking Location:
– BD (CD) BOARD –
TP 
(RFAC)
TP
(DVC 1.65V)
IC103
IC101
34
HCD-C5
Other faults are suspected.
Check the mechanism parts (spindle motor, sled motor, etc.).
Start
NG
NG
NG
OK
OK
OK
Laser Power Check
6-2.
(See page 37)
6-3.
(See page 37)
6-4.
(See page 38)
Iop Compare
Auto Check
Replace optical pick-up or MDM-7B4B
MD  SECTION
Note 1:
About “R”
As this unit has only a few buttons, some operations require the use of remote commander (RM-SC5BEN/provided with unit: 1-476-649-11)
buttons. These operations are indicated as “R” in this manual.
Example:  
MENU/NO “R”
  ...Press the  
MENU/NO
  button of the remote commander.
Note 2:
Incorrect operations may be performed if the MD test mode is not entered properly.
In this case, press the  
?/1
  button to turn the power off, and retry to enter the MD test mode.
1. PARTS  REPLACEMENT  AND  ADJUSTMENT
If malfunctions caused by optical pick-up such as sound skipping are suspected, follow the following check.
Check before replacement
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