DOWNLOAD Sony CMT-EX100 / HCD-EX100 Service Manual ↓ Size: 3.45 MB | Pages: 46 in PDF or view online for FREE

Model
CMT-EX100 HCD-EX100
Pages
46
Size
3.45 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
cmt-ex100-hcd-ex100.pdf
Date

Sony CMT-EX100 / HCD-EX100 Service Manual ▷ View online

11
HCD-EX100
3-4. CD BLOCK
3-5. MOTOR ASSY (LOADING BOARD), CAM AND SW BOARD
Note:
The phase adjustment is required in assembly.
Refer to"Section 1. Servicing Note" for details.
Connector 
MAIN board: CN351
Flat type wire (CN301)
Connector 
MAIN board: CN302
1
2
4
5
6
7
8
Screw (BVTT3x5)
3
Two screws (BVTT3x5)
Screw (BVTT3x5)
Two screws (BVTT3x5)
CD block
1
2
3
4
5
6
7
8
9
0
!™
!∞
Slider (3)
Slider (2)
Disc holder
Lever (1)
Mecha cover
Motor assy
Loading board
SW board
Two screws (BVTP2.6x8)
Two screws (BVTP2.6x8)
Two screws (BVTP2.6x8)
Two screws (BVTP2.6x8)
Screws (BTP2.6x8)
Screws (PTPWH2.6)
Two screws (M2.6)
Two screws (M2.6)
Cam
12
HCD-EX100
3-6. BASE UNIT AND PICK UP ASSY
1
2
3
4
5
6
7
8
9
0
!™
!∞
Two screws (BVTP2.6x8)
Two screws 
(BVTP2.6x8)
Guide (L)
Guide (R)
Slider (4)
Slider (4)
Slider (1)
Two screws (PTPWH2.6)
Screws (PTPWH2.6)
Two screws (PTPWH2.6)
Two screws 
(PTPWH2.6)
Coil spring
Coil spring
BU holder
Pick up assy
3-7. MAIN BOARD (LED BOARD), REG BOARD AND POWER BOARD
Two screws 
(BVTT3x5)
Two screws 
(BVTP3x8)
Two screws (BVTP3x8)
Three screws 
(BVTT3x5)
Two screws 
(BVTT3x5)
Screw (PTPWH2.6)
Screw (BVTT3x5)
Screw (BVTT3x5)
Screw (BVTT3x5)
Main board
Power board
Power cord
REG board
 Connector 
POWER board: CN903
Back panel
LED board
1
2
3
4
Two screws 
(BVTT3x5)
Screw (BVTT3x5)
Shield case
Flat type wire 
(CN702)
Flat type wire (CN701)
5
6
7
8
9
0
qa
qs
qd
qf
qg
qh
qj
qk
ql
w;
 Warning
After repairs are completed and it has been assembled, be sure to carry out the following checks.
1. Make sure the disc opens and closes smoothly.
2. Make sure the disc does not rub on anything when it is played.
13
HCD-EX100
Note:
1. CD Block is basically constructed to operate without adjustment.
Therefore, 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
Ω 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.
S Curve Check
Procedure :
1. Connect the oscilloscope to test points TP (FE) and TP (VC).
2. Connect TP (FEI) and TP (VC) of the MAIN board with lead
wires.
3. Press the  
1/u  button to turn the set ON.
4. Press the  
^  button, load and eject the disc (YEDS-18) to
perform focus search.
5. Check the symmetry and peak to peak level of the oscilloscope
waveform (S curve) at this time.
S-curve waveform
6. After check, remove the lead wire connected in step 2.
Note: • Try to measure several times to make sure than the ratio of
A : B or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the bright-
ness to obtain best waveform.
Checking Location : MAIN board
RF Level Check
Procedure :
1. Connect oscilloscope to test point TP (RF) and TP (VC) on MAIN
board.
2. Press the  
1/u  button to turn the set ON.
3. Put disc (YEDS-18) in and playback No.5track.
4. Confirm that oscilloscope waveform is clear and check RF sig-
nal level is correct or not.
oscilloscope
MAIN board
TP (FE)
TP (VC)
+
symmetry
A
B
Within 3.8 
± 1 Vp-p
oscilloscope
MAIN board
TP (RF)
TP (VC)
+
VOLT/DIV : 200mV
TIME/DIV : 500ns
level : 1.2 
± 0.2 Vp-p
0V
Center of the waveform
B
Symmetry
A (DC voitage)
level : 1.3 
±       Vp-p
+0.6
–0.7
oscilloscope
MAIN board
TP (TE)
TP (VC)
+
Note: Clear RF signal waveform means that the shape “
◊” can be
clearly distinguished at the center of the waveform.
RF signal waveform
Checking Location : MAIN board
E-F Balance (1 Track Jump) check
Procedure:
1. Connect oscilloscope to test point TP (TE) and TP (VC) on MAIN
board.
2. Press the  
1/u  button to turn the unit ON.
3. Put disc (YEDS-18) in and playback No.5track.
4. Press the  
^  button, to pause.
5. Check the level (B) of the oscilloscope's waveform and the DC
voltage (A) of the center of the Traverse waveform.
Confirm the following:
• A/B x 100 = less then 
± 22 (%)
• B = 1.3 
±  
 
Vp-p
1 track jump waveform
SECTION  4
ELECTRICAL ADJUSTMENT
+0.6
–0.7
Checking Location : MAIN board
[ MAIN BOARD ] — SIDE A —
TP
(VC)
TP
(FEI)
TP
(RF)
TP
(FE)
TP
(TE)
IC303
IC301
14
HCD-EX100
SECTION  5
DIAGRAMS
5-1. CIRCUIT BOARDS LOCATION
MAIN BOARD
AMP BOARD
REG BOARD
SW BOARD
POWER BOARD
PANEL BOARD
LED BOARD
EJECT BOARD
LOADING BOARD
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