Sony GV-D300 Operating Instructions (primary manual), Service Manual

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5-4
3-1-2. Precautions on adjusting
1) Removing the CB-61 board CN9926 means removing the
lithium 3V power supply (FP-571 board BT001) , data such as
date, time, user-set menus will be lost. After completing
adjustments, reset these data. If the CB-61 board CN9926 has
been removed, the self-diagnosis data, data on history of use
(total drum rotation time etc. ) will be lost. Before removing,
note down the self-diagnosis data and the data on the history
use (data of page: 2, address: 35 to 3D). (Refer to the “5-4.
Service Mode” for the data on the history use.)
2) The LCD block and EASY connector need not be connected
except during “Battery End Adjustment” and “LCD system
Adjustments”. To remove, disconnect the following connectors.
1. CB-61 board CN9923 (32P, 0.5mm)
2. CB-61 board CN9931 (40P, 0.5mm)
3) IR-29 board (PANEL CLOSE switch, LASER LINK
transmitter) need not be connected except during “IR
Transmitter Adjustment”. To remove, disconnect the following
connectors.
1. CB-61 board CN9924 (10P, 0.5mm)
4) If opening the CB-61 board, use the following extension cable
between the CB-61 board CN9921/CN9930 and RJ-77 board
CN9901/CN9904.
1. J-6082-421-A (80P, 0.5mm)
2. J-6082-422-A (50P, 0.5mm — 48P, 0.8mm)
5) If opening the RJ-77 board, use the following extension cable
between the RJ-77 board (CN3100) and capstan motor.
1. J-6082-423-A (18P, 0.5mm)
Note 1: Setting the “Forced Power ON” mode
1) Select page: 0, address: 01, and set data: 01.
2) Select page: D, address: 10, set data: 02, and press the PAUSE
button of the adjustment remote commander.
The above procedure will enable the VTR power to be turned on
with the power switch block (FP-575) removed.
After completing adjustments, be sure to exit the “Forced Power
ON mode”.
Note 2: Exiting the “Forced Power ON” mode
1) Select page: 0, address: 01, and set data: 01.
2) Select page: D, address: 10, set data: 00, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 0, address: 01, and set data: 00.
3-1-3. Adjusting Connectors
Some of the adjusting points (except for that of the LCD system
adjustments) are concentrated at CB-61 board CN9928 and CN9932.
Connect the measuring instruments via the CPC-6 jig (J-6082-370-
A) , CPC-6 terminal board jig (J-6082-371-A). The following tables
list the pin numbers and signal names of CN9928 and CN9932.
CB-61 board CN9928
CB-61 board CN9932
Pin No.
1
3
5
7
9
11
13
15
17
19
Signal Name
DEC FSC
GND
ENV OUT
LOCK
VCC1
VCC2
GND
GND
DEC B-Y
CPC VGL –18V
Pin No.
2
4
6
8
10
12
14
16
18
20
Signal Name
GND
XCHG
GND
RF OUT
EQ IN
AGC IN
RF MONITOR
JSWP
DEC R-Y
AFC ERR
Pin No.
1
3
5
7
9
11
13
15
17
19
Signal Name
GND
TDI
TCK
GND
GND
GND
NPS B-Y
GND
NPS PLL
GND
Pin No.
2
4
6
8
10
12
14
16
18
20
Signal Name
GND
TDAA
TMS
GND
NPS C
GND
NPS R-Y
GND
NPS Y
GND