Kenwood KVT 737 DVD Service Manual

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KVT-627DVD/627DVDY/717DVD
KVT-737DVD/747DVD/767DVD

NOTES ON ASSEMBLING THE MECHANISM

1. Fasten Screw A so that the interval (a) will be about 5.2mm
and the interval (b) will be about 2.6mm (The interval (a)
can be measured using a pair of vernier calipers or similar
tools.)

2. Turn B so that Position (0) will come at about the center of
interval (d).

3. Then, play the test disc and fine tune A or B so that the jitter
value would be minimized.

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KVT-627DVD/627DVDY/717DVD
KVT-737DVD/747DVD/767DVD

COMPONENTS DESCRIPTION

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Ref. No. Application] Function Operation] Condition] Compatibility
04 For fan 11V power supply For controlling output voltage
06 ANT-CONT SW Comes on when TUNER source is selected
07 P-CONT SW Goes OFF when STANDBY source is selected
08~1t For P-CONT circuit control Controlling P-CONT circuit
012 BU detection SW Comes ON power supply voltage is about 8.8V or more
013 For EXT-AMP control Control of external amplifier
014 For surge voltage detection Comes ON when 015 is ON
015 For surge voltage detection Comes ON when power supply voltage is about 20V or more
050 For i9V power supply Comes ON when 051 is ON
051 For iSV power supply Comes ON when SW14V is ON
052 SW14V power supply SW Comes on at P-ON
054 For BU5V power supply -
055 A8V power supply SW Comes ON when SW14V is ON
058 For BU5V power supply -
059 For A8V power supply BU14V A 8V for audio is supplied
061 V5V power supply SW Comes ON when SW14V is ON
062 SW5V power supply SW Comes ON at P-ON
063 For SW5V power supply BU5V ~> SW 5V is supplied
064 For V5V power supply BU14V A 5V for video is supplied
Q65~70 For i9V power supply
0150 SVRS'BV' Andie 3'3V Comes ON when sw14v is ON
|0150 power supply SW
0151 For SVFl voltage reduction control Electric current control of SVFl voltage reduction circuit
0152 SVRGBV, Audio 3.3V, |0150 power supply Power supply to ICISO, voltage supply to 0151
0200 For audio muting Audio muting of pre-out front right channel
0201 For audio muting Audio muting of pre-out front left channel
0202 For audio muting Audio muting of pre-out rear left channel
0203 For audio muting Muting at momentary power down, resetting, and audio mute timing
0204 For audio muting Audio muting of pre-out rear right channel
0205 For audio muting Audio muting of pre-out center channel
0206 For audio muting Audio muting of pre-out sub-woofer channel
0207 For audio muting Audio muting of AVOUT right channel
0208 For audio muting Muting at momentary power down, resetting, and audio mute timing
0209 For audio muting Audio muting of AVOUT left channel
0250 AM power supply SW Comes ON when AM source is selected
0252 For AM power supply Audio 8V is supplied when AM source is selected
0403,404 Audio selector control SW Converts IC413 p-com controlled terminal voltage: 5V ~> 8V
0405,406 Audio selector control SW Converts IC414 p-com controlled terminal voltage: 5V a SV
0500 For reversing resetting signal voltage Reverses signal in order to obtain resetting signal for TV tuner

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MICROCOMPUTERS TERMINAL DESCRIPTION

Pin No. Pin Name Module (physical) l/O Application Processing Operation Description
36 SCUCHROMAfiSCL Chroma y l/O Access with chroma 7 IC
37 BEiRST B/E O B/E circuit reset L: RESET
38 POWERiDET Power supply I 8.5V over current detection H: Abnormality detection
39 BLiDET INVERTER l Backlight abnormality detection H: Abnormality detection
4O BiPON Power supply 0 SW14 (BU SW)ON/OFF control H: ON
41 ,42 NC 0
43 FSEL1 Power supply 0 DC-DC IC oscillation trequency switching
44 FSEL2 Power supply 0 DC-DC IC oscillation trequency switching
45 FSELSW Power supply 0 Control at DC-DC IC FSEL switching Normal: H, At FSEL switching: L
46 PON Power supply 0 Power supply ON/OFF control H: ON
47 MCNT Power supply 0 Motordriver voltage switching (MECHA7V) (tDlN) H: 7V, L: SV
48 RGBisW VIDEO 0 RGB signal switching L: DVD, H: OTHER
49 OSD7CS OSD O OSD-IC chip select (OSD)
5O OSDiDATA OSD 0 Data output to OSD-IC (OSD)
51 OSD7CLK OSD O Clock output to OSD-IC (OSD)
52 OSDiRST OSD O Resetting OSD-IC (OSD)
53 WRT7E2P pCOM | Used for E2P writing

PWM output.
54 POWERiPWM Power supply 0 DC/DC-IC oscillation trequency control

At FSEL switching stopped. (Output L)
55 JlGiEJ EXTRA | 2D|N
56 PWM INVERTER 0 Liquid crystal brightness control
57 STATUSO JIG O For monitor mechanism endurance Jig
58 STATUS1 JIG O For monitor mechanism endurance Jig
59 PANELiDET PANEL | Front panel attach/detach detection H: Detached, L: Attached 2D|N L-fixed
6O STATUS2 JIG O For monitor mechanism endurance Jig
61 SHiMDATA SH-S 0 Data output to SH-3 p-com (GRAPHIC)
62 SHisDATA SH-3 | Data input from SH-3 p-com (GRAPHIC) OSD is output
63,64 NC 0
65 SYSisREO BOX | Request trom BOX p-com
66 SYSiMREQ BOX 0 Request to BOX p-com
67 SYSioN BOX 0 BOX p-com ON/OFF control H: ON, L: OFF
68 SYSisDATA BOX | Data input from BOX p-com
69 SYSiMDATA BOX 0 Data output to BOX p-com
70 SYSiCLK BOX 0 Communication clock with BOX p-com 250kHz
71 MlNLCS/MINLCS PANEL 0 Communication with mini liquid crystal
71 MlNLCS/FLASl-LSDATA pCOM | For Ilash writing
72 MlNliMDATA/MINLMDATA PANEL 0 Communication with mini liquid crystal
72 MlNliMDATAlSUBLEDisw PANEL 0 Model without mini liquid crystal LED ON/OFF HI: ON
72 MlNliMDAWFLASHiMDATA pCOM O For tlash writing
73 MlNLCLK/MINLCLK PANEL 0 Communication with mini liquid crystal
73 MlNLCLK/FLASHicLK pCOM | For flash writing

KVT-627DVD/627DVDY/717DVD
KVT-737DVD/747DVD/767DVD

15

Page 33

KVT-627DVD/627DVDY/717DVD
KVT-737DVD/747DVD/767DVD

TEST MODE

0 Touch Screen

- Touch variances in different sets are adjusted.
Touch the markers for three points in order. When EEPROM
OK screen is displayed, adjustment is complete.

Touch input in progress

First point is being input Second point is being input

I \

Cancel

&

Third point is being input

Mm
Cancel:
The first point is being input.Test Mode Main Screen is dis»
played.
The second point is being input which will move on. Transit
to the first point being input.

EEPROM writing complete OK/NG Screen

Write OK/NG

Ke S ecification
ReturnzTest Mode Main Screen is displayed.

Note: When NG, enter the Test Mode again, and re-do from
the beginning.

0 Hposi Screen

- Horizontal position for each screen is adjusted.

Hposi Adjustment screen

Adjustment item

513p value
Adjustment item

5m, value

Ke S ecification

Next: To next Hposi adjustment screen. When in NAVI
screen, EEPROM writing will begin.

<< :The screen moves to the left.

>> :The screen moves to the right.

Cancel: Test Mode Main Screen is displayed.

Note:The key arrangements are somewhat different with
OSD model and Graphic model. (With the Graphic model,
one adjustment item per one screen.)

Note: There is no need for the upper column (Graphic) of
the first adjustment screen of the OSD model to be adjusted.

EEPROM writing compete OK/NG Screen

Hposi OK/NG

Ke S ecification

Return: Test Mode Main Screen is displayed.

Note: In case of NG, enter the Test Mode again and re-do
from the beginning.

Note: The key arrangements are somewhat different with
OSD model and Graphic model.

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