Read Sony HCD-EC68P / HCD-EC78P / MHC-EC68PI / MHC-EC78PI Service Manual online
HCD-EC68P/EC78P
HCD-EC68P/EC78P
39
39
M001
CN001
S001
5P
OPEN SW
CLOSE SW
OPEN
CLOSE
(LOADING)
DGND
CLOSE
OPEN
CD TRAY
OPEN/CLOSE
DETECT
PANEL
BOARD
CN311
Q
CN001
S001
A
B
1
2
3
4
5
6
7
1-866-548-
21
(21)
MOTOR BOARD
Q
PANEL BOARD
CN311
DISC TRAY
OPEN/CLOSE
DETECT
OPEN 5CLOSE
M
M001
(LOADING)
(Page 37)
6-17. PRINTED WIRING BOARD - MOTOR Board (EC68P/EC78P: US, Canadian models) -
6-18. SCHEMATIC DIAGRAM - MOTOR Board (EC68P/EC78P: US, Canadian models) -
•
: Uses unleaded solder.
• See page 27 for Circuit Boards Location.
• Waveforms
– CD Board –
– CD Board –
IC101 XG (XO)
(CD play mode)
(CD play mode)
1 V/DIV, 20 ns/DIV
59.1 ns
3.3 Vp-p
IC101 JB (RFi)
(CD play mode)
(CD play mode)
200 mV/DIV, 500 ns/DIV
0.5 to 1.3 Vp-p
XB
IC801 RM (XIN)
500 mV/DIV, 5
µs/DIV
13.3
µs
1 Vp-p
– MAIN Board –
FT
IC301 PT (X1)
1 V/DIV, 50 ns/DIV
166 ns
3 Vp-p
FB
IC301 RG (X1A)
1 V/DIV, 10
µs/DIV
30.5
µs
3 Vp-p
– PANEL Board –
(Page 36)
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