Sony HCD-FL7D Service Manual page 37

REC BIAS 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. A f t e r p r e s s button, press
PAUSE/START]
button, then rec ording start.
4. Mode: Record
DSP board
MD (AUDIO) (J701)

1) 315 Hz

50 mV (–23.8 dB)
2) 10 kHz 
AF OSC
blank tape
600 Ω CN-123
attenuator
set
5. Mode: Playback
SP RELAY board
CN804
recorded
level meter
Pin 2 (L-CH)
portion
Pin 5 (R-CH)
+
set
–
SP RELAY board
CN804 Pin 3 (GND)
6. Confirm the playback signal recorded in step 3 becomes ad-
justable level as follows.
If these levels are not adjustable level, adjust the RV2 (L-CH)
and RV52 (R-CH) on the SP RELAY board to repeat steps 4
and 5.
Adjustable level: Playback output of 315 Hz to playback output
of 10 kHz: ±1.0 dB
Adjustment Location: SP RELAY board
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 button, press
PAUSE/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
set
[REC
5. Mode: Playback
SP RELAY board
recorded
level meter
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 ad-
justable 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
– SW BOARD (Component Side) –
TAPE SPEED
ADJUSTMENT
(NORMAL) (HIGH)
RV1002 RV1001 CN1001
– SP RELAY BOARD (Conductor Side) –
REC LEVEL
ADJUSTMENT
RV53
REC BIAS
ADJUSTMENT
(R-CH) (L-CH)
[REC
RV52 RV2
CN804
13 1
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 re-
blank tape
placed, re-adjusting the servo circuit is necessary. Select "ALL" at
CS-123
"1. DRIVE AUTO ADJUSTMENT" (Refer to page 29 in TEST
MODE) and adjust DVD-SL (single layer), CD and DVD-DL (dual
layer).
37 37
HCD-FL7D
Ver 1.3