Table of Contents
Advertisement
[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.
HCD-EC709iP/EC909iP
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 MΩ 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
oscilloscope
(DC range)
BD73 board
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) –
CL117
(VREF)
CL102
(RFOUT)
IC101
13
13
HCD-EC709iP/EC909iP
Advertisement
Table of Contents
