HCD-EC709IP, HCD-EC909IP - Sony Audio Service Manual (repair manual). Page 13

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HCD-EC709iP/EC909iP
HCD-EC709iP/EC909iP
13
13
[iPod & iPhone]:
Tracking servo setting changes whenever the button is pressed 
(This function is executable only while CD is playing).
“ON”: Tracking servo ON.
“OFF”: Tracking servo OFF.
[FUNCTION]:
S character mode setting changes whenever the button is pressed.
“  ”: S character mode OFF.
“S”: S character mode ON.
5.  To release from this mode, press three buttons of [
u], [iPod 
& iPhone] and [
?/1
] simultaneously.
SECTION  4
ELECTRICAL  CHECK

Note:
1.  CD Block is basically constructed to operate without adjustment.
2.  Use YEDS-18 disc (Part No. 3-702-101-01) unless otherwise indicat-
ed.
3.  Use an oscilloscope with more than 10 M
Ω impedance.
4.  Clean the object lens by an applicator with neutral detergent when the 
signal level is low than specifi ed value with the following checks.
5.  Check the focus bias check when optical pick-up block is replaced.
FOCUS  BIAS  CHECK
+
–
BD73 board
oscilloscope 
(DC range) 
CL102 (RFOUT)
CL117 (VREF)

Procedure:
1.  Connect the oscilloscope to CL102 (RFOUT) and CL117 
(VREF) on the CD board.
2. Press the [
?/1
] button to turn the power on, and press the 
[FUNCTION] button to select CD function.
3.  Set disc (YEDS-18) and press the [
u] button to playback.
4. Confi rm that oscilloscope waveform is as shown in the fi gure 
below (eye pattern).
 
A good eye pattern means that the diamond shape (
◊) in the 
center of the waveform can be clearly distinguished.
VOLT/DIV: 200 mV 
TIME/DIV: 500 ns
level:
1.1 ± 0.4 Vp-p
Checking Location:
– BD73 Board (Conductor Side) –
IC101
CL102
(RFOUT)
CL117
(VREF)

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