Electrical Adjustments - Sony HCD-FLX7D Service Manual

ELECTRICAL ADJUSTMENTS

DECK SECTION 0 dB=0.775 V
1. The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
2. The adjustments should be performed in the order given in
this service manual. (As a general rule, playback circuit ad-
justment should be completed before performing recording
circuit adjustment.)
3. The adjustments should be performed for both L-CH and R-
CH.
4. Switches and controls should be set as follows unless other-
wise specified.
Test Tape
Tape Signal Used for
WS-48B 3 kHz, 0 dB Tape Speed Check
TAPE SPEED CHECK DECK B
Note: Start the Tape Speed adjustment as below after setting to the test
mode.
In the test mode, the tape speed is high during pressing the
[CD SYNC HI-DUB]
button.
Procedure:
1. Press button to turn the set ON.
?/ 1
[DISPLAY] [CD SYNC HI-DUB]
2. Press three buttons , and
x
simultaneously.
To release from the test mode, press the ?/ 1 button.
Mode: Playback
SP RELAY board
test tape
CN804
WS-48B
frequency counter
Pin 2 (L-CH)
(3 kHz, 0 dB)
Pin 5 (R-CH)
+
set
–
SP RELAY board
CN804 Pin 3 (GND)
1. Insert the WS-48B into the deck B.
2. Press the hH button on the deck B.
[CD SYNC HI-DUB]
3. Press the button in playback mode.
Then at HIGH speed mode.
4. Check so that frequency counter reads 6,000 180 Hz.
[CD SYNC HI-DUB]
5. Press the button.
Then back to NORMAL speed mode.
6. Check so that frequency counter reads 3,000 90 Hz.
Check Location: SP RELAY board
Sample Value of Wow and Flutter: 0.3% or less W. RMS (JIS)
(WS-48B)
SECTION 6
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.
[VIDEO $SAT%]
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
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
600
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.
[VIDEO $SAT%]
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
attenuator
[REC
5. Mode: Playback
button, press
SP RELAY board
recorded
CN804
portion
Pin 5 (R-CH)
set
SP RELAY board
blank tape CN804 Pin 3 (GND)
CN-123
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
SP RELAY BOARD (Conductor Side)
REC BIAS
ADJUSTMENT
13
[REC
33 33
DVD SECTION
About the dicision to pass or fail of the optical pick-up block, re-
fer to "DICISION TO PASS OR FAIL OF THE OPTICAL PICK-
UP BLOCK" (see page 8)
blank tape
CS-123
AUTO SERVO ADJUSTMENT
After parts related to the servo circuit (RF amplifier (IC001), DSP
set
(IC509), motor driver (IC501), EEPROM (IC903) so on) are re-
placed, re-adjusting the servo circuit is necessary. Select "ALL" at
"1. DRIVE AUTO ADJUSTMENT" (Refer to page 27 in TEST
MODE) and adjust DVD-SL (single layer), CD and DVD-DL (dual
layer).
level meter
+
–
REC LEVEL
ADJUSTMENT
RV53
(R-CH) (L-CH)
RV52 RV2
CN804
1
HCD-FLX5D/FLX7D