Sony HCD-FL5D Service Manual page 36

Dvd deck receiver
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HCD-FL5D
Ver 1.5
REC LEVEL ADJUSTMENT DECK B
Procedure:
In the MC test mode, the "REC memory mode" is convenient for
this adjustment. In the "REC memory mode" , when the REC starts
the input signal FUNCTION is switched to VIDEO automatically.
When the REC stops, the tape returns near to the recording start
position.
[MD $VIDEO%]
1. Press
button to select VIDEO. (This step is not
necessary if the above test mode has already been set)
2. Insert a tape into deck B.
[REC PAUSE/START]
3. After press
START]
button, then recording start.
4. Mode: Record
DSP board
MD (VIDEO) (J701)
315 Hz, 50 mV (–23.8 dB)
AF OSC
600 Ω
attenuator
5. Mode: Playback
SP RELAY board
recorded
CN804
portion
Pin 5 (R-CH)
set
SP RELAY board
CN804 Pin 3 (GND)
6. Confirm the play back signal recorded in step 3 becomes
adjustable level as follows.
If these levels are not adjustable level, adjust the RV53 (R-CH)
on the SP RELAY board to repeat steps 4 and 5.
Adjustable level:
CN804 PB level: 47.2 to 53.0 mV (–24.3 to –23.3 dB)
Adjustment Location: SP RELAY board
– SP RELAY BOARD (Conductor Side) –
REC BIAS
ADJUSTMENT
13
36
[REC PAUSE/
button, press
blank tape
CS-123
set
level meter
+
REC LEVEL
ADJUSTMENT
RV53
(R-CH)
(L-CH)
RV52 RV2
CN804
1
– SW BOARD (Component Side) –
TAPE SPEED
ADJUSTMENT
(NORMAL) (HIGH)
RV1002 RV1001
DVD SECTION
AUTO SERVO ADJUSTMENT
After parts related to the servo circuit (RF amplifier (IC001), DSP
(IC509), motor driver (IC501), EEPROM (IC903) so on) are
replaced, re-adjusting the servo circuit is necessary. Select "ALL"
at "1. DRIVE AUTO ADJUSTMENT" (Refer to page 28 in TEST
MODE) and adjust DVD-SL (single layer), CD and DVD-DL (dual
layer).
RF LEVEL CHECK
Connection:
MB board
CN901 1 pin
CN901 3 pin
Procedure:
1.
Connect an oscilloscope to test point 1 pin and 3 pin of
CN901 on the MB board.
2.
Turn the power on.
3.
Put the disc (LUV-P01) (Part No.: 4-999-032-01) (CD) in to
playback.
4.
Confirm that oscilloscope waveform is clear and check RF
signal level is correct or not.
5.
Put the disc (TDV-520CSO) (Part No.: J-2501-236-A) (DVD)
in to playback.
6.
Perform confirmation in the same manner as step 4.
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:
– MB Board (Component Side) –
7
1
CN901
CN1001
oscilloscope
+
VOLT/DIV: 200 mV
TIME/DIV: 500 ns
CD: 1.05 ± 0.2 Vp-p
DVD: 1.09 ± 0.2 Vp-p

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