Casio VM-6500 Troubleshooting guide

R
VM-6500
(KX-666B)
NOV. 2000
(without price)
VM-6500
INDEX

CONTENTS
1. SPECIFICATIONS ................................................................................................................... 1
2. BLOCK DIAGRAM................................................................................................................... 2
3. ADJUSTMENTS....................................................................................................................... 3
3-1. Adjustments to be done................................................................................................... 3
3-2. Adjustments...................................................................................................................... 3
4. EXPLODED VIEW.................................................................................................................... 6
5. PARTS LIST............................................................................................................................. 7
6. SCHEMATIC DIAGRAMS...................................................................................................... 10

— 1 —
1. SPECIFICATIONS
Monitor (VM-105U)
Display Element: High-resolution color LCD
Pixels: 224,640 (234 ×960)
Driver: TFT active matrix
Light Source: Internal backlight;high luminosity fluorescent lamp
Speaker: One (3.6 cm) round speaker
OperatingTemperature: 0 °C to 40 °C
Storage Temperature: –20 °C to 60 °C
Dimensions: 7 1/16"(W) ×1 3/16"(D) ×5 1/16"(H)
18.0(W) ×3.05(D) ×12.8(H) cm
(excluding projections)
Approximate Weight: 15.3 oz (434 g)
Connector Box (AV-2VM)
Dimensions: 2 9/16"(W) ×1 3/8"(D) ×1 1/16"(H)
6.5 (W) ×3.5(D) ×2.7(H) cm
(excluding projections)
Approximate Weight: 6.0 oz (170 g)
Cable Length: Approximately 4.8 m
Center Console Box Stand Base (KY-01CA)
Dimensions: 3 15/16"(W) ×2 7/8"(D) ×3 13/16"(H)
10.0 (W) ×7.3(D) ×9.7(H) cm
Approximate Weight: 6.3 oz (180 g)
Accessories: Five screws
Headrest Stand (OS-29R)
Stand Length: 16 1/8"
41.0 cm (when extended)
Approximate Weight: 14.6 oz (415 g)

— 2 —
2. BLOCK DIAGRAM
RCA jack Yellow
Ext. Video input
Ext. Audio input
Video from VCP
Remote control
signal to VCP
Power input
(VCC1-1)
Audio from VCP
EXT. INT.
VDD
RCA jack White SP
VSH
LCD (with CONTROLLER)
+
CFL
VDD VGL VSH EAR
VDD
CHROMA-IC
IR3Y31
VSH
VCC1-1
OFF ON LCD power
Control power
PQ05SZ
Remote control
signal
RPM6938
CFL power VCC9 CFL inverter
DIN Connecter TCS7626-18-301
Power IC
(Switching Voltage Regulator)
VGL
VDD
VSH
VGH
Volume
Control
Bright
Control
Audio
amplifier
NJM386
VCC1-1
VCC1-2
FA7611

— 3 —
Adjustments Necessary equipment
1. VDD adjustment, Power supply, Digital voltmeter
VGH, VSH, VGL, Vcc9 voltage check
2. Bright adjustment Power supply, Signal generator, Oscilloscope
3. Contrast adjustment Power supply, Signal generator, Oscilloscope
4. TINT color adjustment Power supply, Signal generator, Oscilloscope
5. LCM screen positioning Power supply, Signal generator
3. ADJUSTMENTS
3-1. Adjustments to be done
3-2. Adjustments
1. VDD adjustment, VGH, VSH, VGL, Vcc9 voltage check
•Conditions
Apply 11.50 ±0.05 [V] on Vcc1-1.
•Adjustment
Adjust VR161 so that VDD (CP165) voltage becomes 5.00 ±0.02 [V].
•Checking
VGH (CP168) = 19.0 ~ 21.0 [V]
VSH (CP166) = 13.5 ~ 14.5 [V]
VGL (CP164) = –5.5 ~ –4.0 [V]
Vcc9 (CP163) = 7.8 ~ 8.4 [V]
VDigital
Voltmeter
M-PCB
Stabilizer VCC1-1
VDD
VGH
VSH
VGL
VCC9
10.0 ±0.1 V
VCC1-1
IF signal
Signal
generator
Stabilizer
Oscilloscope
M-PCB
CP706
CP301
VDD (+5 V)
22 KΩ
2. Bright adjustment

— 4 —
•Conditions
(1) Apply 11.50 ±0.05 [V] on Vcc1-1.
(2) Signals: provide color bar pattern (white 75 %) composite video signal from CP196.
Signal level; 1Vp-p +/- 0.01V (75 ohm termination), conforming to NTSC-M system.
(3) Apply VDD (+5V) voltage on KILLER terminal (CP301) via 22 kΩresistance.
•Adjustment
(1) Triggering CP702 (FRP), adjust VR304 so that positive and negative pedestal level of CP706 (VB) is
10.0 +/- 0.1V.
•Caution
(1) Make sure that waveforms are not distorted.
(2) Do not turn VR430 until contrast, tint, and color level adjustments are completed.
(3) Leave the resistor connected between CP301 (KILLER) and VDD until contrast adjustment is completed.
3. Contrast adjustment
•Conditions
(1) Apply 11.50 ±0.05 [V] on Vcc1-1.
(2) Signals: provide color bar pattern (white 75 %) composite video signal from CP196.
Signal level; 1Vp-p +/- 0.01V (75 ohm termination), conforming to NTSC-M system.
•Adjustment
(1) Triggering CP702 (FRP), adjust VR301 so that CP706 (VB)’s negative and positive white peak voltage
becomes 4.75 +/- 0.1V.
•Caution
(1) Make sure that waveforms are not distorted.
(2) Make sure to perform this adjustment after brightness adjustment.
(3) After the adjustment, remove the resistor connected between CP301 (KILLER) and VDD.
4.75 ±0.1 V
VCC1-1
IF signal
Signal
generator
Stabilizer
M-PCB
CP706
CP301
VDD (+5 V)
22 KΩ
Oscilloscope

— 5 —
4. TINT color adjustment
•Conditions
(1) Apply 11.50 ±0.05 [V] on Vcc1-1.
(2) Signals: provide color bar pattern (white 75 %) composite video signal from CP196.
Signal level; 1Vp-p +/- 0.01V (75 ohm termination), conforming to NTSC-M system.
(3) Connect 47kohm resistor between CP304 and CP300 (GND).
•Adjustment
(1) Triggering CP702 (FRP), observe CP706 (VB) waveform.
(2) Adjust VR303 so that yellow, green, and red pulses are level.
(3) Adjust VR302 so that yellow, green, and red pulses are same height as black pulse.
(4) Repeat steps (3) and (4) until;
Amplitude difference of blue and purple pulses (center two pulses) is less than 0.1V.
Amplitude difference between black and yellow and red (both adjoining pulses of blue and purple) is less
than 0.1V.
(5) Remove the 47kohm resistor between CP304 and CP300 (GND).
VCC1-1
IF signal
Signal
generator
Stabilizer
M-PCB
CP706
CP304
Yellow Black
Green
Red
47 KΩOscilloscope
5. LCM screen positioning
•Conditions
(1) Apply 11.50 ±0.05 [V] on Vcc1-1.
(2 Signals: Apply monoscope pattern composite video signal from CP196.
Signal level; 1Vp-p +/-0.01V (75 ohm terminated), conform to NTSC-M system.
•Adjustment
(1) Connect LCM to display monoscope pattern.
(2) Adjust LCD’s H.POS to display the picture in the center.
Adjust so that the right and left patterns are the same.
•Caution
(1) Non-equality of right and left pattern should be less than 1 mm.
(2) Adjustment should be done with the display unit which is assembly of LCM and PCB.
VCC1-1
IF signal
Signal
generator
Stabilizer
M-PCB LCM
Signal
Backligjt
Right and left pattern balance
should be equal.
The difference between the
right and left pattern should be
less than 1mm.

— 6 —
4. EXPLODED VIEW
5 10 7
3
1
9
16
S1
S2
2
S5
11 12
8S4
S4 S5
4
S5
S5
15
S2 S4
6
S4
17
13
S4
14
S3 x 4

5.PARTS PRICE LIST
Monitor (VM-105U)
NItem Code No. Parts Name Specification QPrice Code R
-01 2725 1395 MODULE/TFT-LCD P64AN2 1EP A
N02 -PCB ASSY/MONITOR RJK501696*001V01 1-
-03 1000 2491 CASE/UPPER BXM-K662 K140633-2 1BB X
N04 1004 2733 FRAME AAM-K658 K140635-2 1AZ X
-05 6610 0341 PLATE/CASIO K440276A-1 1AF X
-06 1000 2507 KNOB/SWITCH AAM-K662 K341720-1 1AB X
-07 6611 2010 COVER/SENSOR AM-K660 K340585-2 1AL X
-08 1000 2505 SPACER/CODE AAM-K662 K341716-1 1AB X
-09 6614 5520 CABLE/FLAT AAM-K658 K441911-1 1AC X
-10 6614 5510 CUSHION AAM-K658 K441873-1 1AA X
-11 6614 5500 TAPE/SHIELD AAM-K658 K441874-1 1AD X
N12 1004 2730 PLATE/RATING BXA-K662 K440985-13 1AA X
N13 1004 2738 CASE/LOWER BXN-K662 K140634-4 1BX X
-14 6610 0360 ATTACHMENT AM-K635 K340292-1 1AI X
-15 3831 1108 SPEAKER K036NA505-12 1AS B
-16 6614 5480 CABLE/SPEAKER K441872-1 1AB X
-17 6614 5470 TAPE/INSULATED AAM-K658 K441912-1 1AA X
-S1 6630 7430 SCREW A-K618 K440305-1 3AA X
-S2 6611 2110 SCREW A-K650 K440850-1 4AA X
NS3 1004 2727 SCREW/PRECISION (+) BT3 2X4BK 4AA X
NS4 1004 2731 SCREW/PRECISION (+) BT3P 2X6BK 6AA X
NS5 1004 2734 SCREW/PRECISION (+) BT3P 2.6X8NI 6AA X
Accessory
NItem Code No. Parts Name Specification QPrice Code R
N1004 2737 CABLE/CONNECTION AV-2VM 1CP C
-1000 5805 PLATE ASSY/BASE KY-01CA 1AZ X
-1000 2146 STAND/REAR OS-29R-(D) 1CP X
Note : NEW - New registration parts
Q - Quantity used per unit
R - Rank
- 7 -

MONITOR PCB
NItem Code No. Parts Name Specification QPrice Code R
N02 -PCB ASSY/MONITOR RJK501696*001V01 1-
CONNECTORS
-CN190 3502 2256 CONNECTOR TCS7926-18-301 1AI X
-CN600 3502 1529 CONNECTOR CGP4702-0101 1AB X
-CN700 3501 6720 CONNECTOR 006200520330000 1 AI X
-CN900 3502 2707 CONNECTOR SM02(8)B-BHS-1-TB 1AD X
DIODES
-D170 2390 1449 DIODE/CHIP/SCHOTTKY MA701A-(TX) 1AC X
-D172 7101 1194 DIODE MA111(TX) 1AA X
-D174 2390 1379 DIODE/SCHOTTKY MA729-(TX) 1AB X
-D176 2390 1379 DIODE/SCHOTTKY MA729-(TX) 1AB X
-D177 7101 1194 DIODE MA111(TX) 1AA X
-D178 7101 1194 DIODE MA111(TX) 1AA X
-D180 2390 1470 DIODE/CHIP MA143A-(TX) 1AA X
-D190 2390 1883 DIODE/TIP/SCHOTTKY RB160L-40TE25 1AC X
-D191 7101 1194 DIODE MA111(TX) 1AA X
-D192 7101 1194 DIODE MA111(TX) 1AA X
-D905 7101 1194 DIODE MA111(TX) 1AA X
- - 6614 5560 SPACER / LED K341677-1 1AB X
-D500 2370 1211 LED SLR-342VR3F 1AA X
FUSE
-FU161 3632 0343 FUSE/CHIP SSFC1AR12A4 1AH A
OSCILLATOR
-H301 2590 1239 OSCILLATOR/CRYSTAL HC-49/U-S-A 1AH X
ICS
-IC160 2114 2660 IC FA7611M-TE1 1AS X
-IC170 2114 4816 IC/LINEAR PQ05SZ5U 1AL X
-IC301 2114 5901 IC IR3Y31M 1BN X
-IC550 1000 2467 IC RPM6938-V4 1AL X
-IC650 2114 1750 IC/LINEAR NJM386-M-T1 1AE X
-IC701 2105 6381 IC/MOS TC74HC14AF(EL) 1AC X
-IC902 2105 4109 IC TC7S14F(TE85L) 1AC X
TRANSISTORS
-Q160 2251 0868 TRANSISTOR 2SB1261K-Z-E1 1AE X
-Q161 2252 0714 TRANSISTOR/CHIP 2SD1623S,T-TD 1AC X
-Q163 2251 0189 TRANSISTOR/CHIP 2SB1218A-R(TX) 1AA X
-Q164 2253 0133 TRANSISTOR/CHIP 2SD1819A-R(TX) 1AA X
-Q190 2251 0189 TRANSISTOR/CHIP 2SB1218A-R(TX) 1AA X
-Q191 2253 0133 TRANSISTOR/CHIP 2SD1819A-R(TX) 1AA X
-Q902 2259 1540 TRANSISTOR/DIGITAL DTC144EU-T106 1AA X
-Q910 2253 0719 TRANSISTOR/CHIP 2SD2391T100 1AB X
-Q911 2253 0719 TRANSISTOR/CHIP 2SD2391T100 1AB X
-Q921 2251 0189 TRANSISTOR/CHIP 2SB1218A-R(TX) 1AA X
VARIABLE RESISTORS
-VR161 2775 2751 RESISTOR/SEMIFIXED/CHIP EVN5ESX50B23 1AA X
-VR301 2775 2765 RESISTOR/SEMIFIXED/CHIP EVN5ESX50B54 1AA X
-VR302 2775 2765 RESISTOR/SEMIFIXED/CHIP EVN5ESX50B54 1AA X
-VR303 2775 2765 RESISTOR/SEMIFIXED/CHIP EVN5ESX50B54 1AA X
-VR304 2765 0623 VOLUME RK09H11T-20KB 1AD C
-VR650 2765 0616 VOLUME RK09H11T-10KB 1AD C
Note : NEW - New registration parts
Q - Quantity used per unit
R - Rank
- 8 -