Microprocessor; Ld Tracking Balance; Ld Focus Gain Adjustment - Sony MDP-440 MDP-640D Service Manual

1-4, POWER SUPPLY CHECK (PS-193 BOARD)
Mode
Measuring Equipment
UN REG +16V check
Fin © of 002
Measurement Point | (eo ony
Specified Value (salt 5
UN REG —16V check
Pin @ of wooe
Measurement Point | [pe . Gapy
Specified Value =ie5eiV
REG_+5V check
i Pin © of 002
Measurement Point | (oe Gupy
Specified Value 512020
REG —BV check
Pin @ of W002
| Measurement Point | nin GND)
=5=05V
—
Specified Valve
* Confirm that the power supply voltages satisfy the
respective specified valves,
1.5, SYSTEM CONTROL SYSTEM ADJUSTMENT
15-1, Microprocessor Clock (PAL) Adjustment
(MP.31 Board)
Mode Stop
Pin D of 1¢608
Measurement Point,
Measuring Gyvipment | Frequency counter
Adjusting Element — | CV 601
4.433.619 £1082
Specified Value
Adjustment method
Vadjust with CVEDL to 4.493.619 1082.
JUU't
4.493.619" 10H
Fig. 7-2
1-5-2. Microprocessor Clock (NTSC) Adjustment
(HP-31 Board)
Mode "T Stop
[Measurement Polat Fin @ of CRS
"Measuring Equipment Frequency counter
'Adjusting Bement | CVU
CHa
Adjustment method :
1) Adjust vith CVS02 0 3,579,54
| ow
Fig. 7-3.
1.6, SERVO SYSTEM ADJUSTMENT
When adjusting the serva system, look out for the
following items =
© Use the MD adjustment cable (J-6082-089-A),
* Ad:ust the CD svrvo system after the digital audio
system adjustment is completed,
© When setting the tracking servo to the open state,
set to the STOP state once and proceed to the next
step,
* Wher the opticel block is replaced, perform the
adjustment in the foltowing order.
Note: Start adjustment at maximum CD RF H tevel
(RY108 [wily counterclockwise direction).
1. LD 'Tracking Balance Adjustment
1) Focus valance adjustment
2) Tracking batance adjustment
LD Focus Gain Adjustment
LD Cross Talk Balance Adjustment
1) TAN cam adjustment
2) RAD-TILT adjustment
3) Focus balance adjustment
4, LD Tracking Gain Adjustment
5, 2D Adjustment
6. CD Focus Batance Adjustment
CD RF 8 Level Adjustment
CD RF & Level Adjustment
—127—