Printer System Adjustment; Printer Head Voltage Adjustment - Sony DCR-TRV820 Service Manual

3-7.

PRINTER SYSTEM ADJUSTMENT

1. Printer Head Voltage Adjustment

Adjust the printer head voltage.
If disordered, the printing density will be dark or thin.
Mode Memory
Signal Arbitrary
+Probe: Pin 0 of CN701 (PR HEAD
Measurement Point
–Probe: Pin 8 of CN701 (REG
Measuring Instrument Digital voltmeter
Adjustment Page F
Adjustment Address 83
Specified Value Optimum value ± 0.05 Vdc (Note)
Note: The optimum head voltage varies depending on the printer
unit.
Confirm the optimum value given on the printer unit. (Fig.5-
3-19)
Switch setting:
1) PRINT STANDBY switch ........... ON
2) LCD screen .................................. Open
Connection:
1) Connect a digital voltmeter to the PR-33 board CN701 via
CPC-14 jig (J-6082-498-A) as shown in Fig.5-3-20.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 5, address: 01, and set data: 5A, then press the
PAUSE button of the adjustment remote commander.
3) Select page: 5, address: 00, and set data: 01, then press the
PAUSE button of the adjustment remote commander.
4) Change data on page: F, address: 83 so that the printer head
voltage becomes optimum value ± 0.05 Vdc.
5) Press the PAUSE button of the adjustment remote commander.
6) Select page: 0, address: 01, and set data: 00.
7) Turn the main power supply (8.4 V) OFF.
12V) on PR-33 board
GND) on PR-33 board
Printer unit
5-56
Printer head
voltage label
Fig. 5-3-19
Digital voltmeter
+
CPC-14 jig
PR-33 board
(J-6082-498-A)
CN701
10
1
Fig. 5-3-20
–