JVC GR-D230US Service Manual page 19

Jig connector diagrams
JIG CONNECTOR CABLE
MAIN
CN111
NOTE :
DDI 1
The JIG CONNECTOR BOARD uses
21
DDO
30 of the 40 pins of the MAIN BOARD.
DMS 2
10 Pins (1 to 5, 21 to 24 and 34) on
DCK 22
the JIG CONNECTOR BOARD on the
DRST 3
Main board are NC.
23
FL_MDO
RESET 4
24
AL_3VSYS
IF_TX 5
JLIP_TX 25
JLIP_RX 6
26
TMS_DSC
TCK_DSC 7
27
TDI_DSC
TRST_DSC 8
TDO_DSC 28
PB_CLK 9
29
ENV_OUT
MAIN_VCO 10
30
ATFI
HID1 11
DISCRI 31
FS_PLL 12
32
TXD2
SPA 13
33
SBE
RXD2 14
GND 34
GND 15
35
V_OUT
VCOM_M 16
36
CVF_B
CVF_R 17
CVF_G 37
HD_M 18
38
VCOM_E
NC 19
39
EMU1
KENTO 20
MVD 40
Fig.4-2-2
4.3
4.3.1 Tape pattern adjustment
NOTE:
JIG CONN. BOARD
(PIN NO.)
6 JLIP_RX
7 TCK_DSC
8 TRST_DSC
9 PB_CLK
10 MAIN_VCO
11 HID1
12 FS_PLL
13 SPA
14 RXD2
15 GND
16 VCOM_M
17 CVF_R
18 HD_M
19 NC
20 KENTO
25 JLIP_TX
26 TMS_DSC
27 TDI_DSC
28 TDO_DSC
29 ENV_OUT
30 ATFI
31 DISCRI
32 TXD2
33 SBE
35 V_OUT
36 CVF_B
37 CVF_G
38 VCOM_E
39 EMU1
40 MVD
4.4
Electrical adjustment is performed by using a personal computer
and software for SERVICE SUPPORT SYSTEM. Read
README.TXT file to use the software properly.
As for the connection of cables, see "4.2 JIG CONNECTOR
CABLE CONNECTION".
MECHANISM COMPATIBILITY ADJUSTMENT
Prior to the adjustment, remove the COVER (ADJUST).
(1) Play back the compatibility adjustment tape.
(2) While triggering the HID1, observe the waveform of
ENV_OUT.
(3) Set the manual tracking mode (ATF OFF).
(4) Confirm that the waveform is entirely parallel and straight,
and free from remarkable level-down, through the tracking
operation.
Make the confirmation as follows if necessary.
(5) If level-down is observed on the left hand side of the
waveform, straighten the level by turning the GUIDE
ROLLER (SUP).
If level-down is observed on the right hand side of the
waveform, straighten the
level by turning the GUIDE ROLLER (TU).
(6) After the adjustment, try the unloading motion once, and
confirm that the waveform is flat when the tape has been
played back again.
(7) Play back the self-recording.
(8) Confirm that the waveform is flat.
ENV_OUT
HID1
Fig.4-3-1
Misalignment of guide
Misalignment of guide roller
roller height on the
height on the take-up side
supply side
Fig.4-3-2
ELECTRICAL ADJUSTMENT
Flatten the waveform.
(No.YF042)1-19