SHARP VLH860U, VLH880U Service Manual
VL-H870U
VL-H875U
VL-H890U
SERVICE MANUAL
SERVICE MANUAL
S39F1VL-H860U
LIQUID CRYSTAL CAMCORDER Hi 8 NTSC
VL-H860U
VL-H860U
VL-H860U
VL-H880U
VL-H880U
LIQUID CRYSTAL CAMCORDER Hi
In this Service Manual, only the differences from VL-H870U/H875U/H890U
(S29C4VL-H870U) are described.
Therefore, for the Mechanism parts which are not described in this Service
Manual, refer to the Service Manual for VL-H870U/H875U/H890U (S29C4VLH870U).
8
NTSC
MODELS VL-H860U/H880U
1. IMPORTANT SERVICE NOTES ........................................................................................................ 2
2. SPECIFICATIONS .............................................................................................................................. 4
3. PART NAMES AND FUNCTION ......................................................................................................... 5
4. DISASSEMBLY OF THE SET............................................................................................................. 6
6. ADJUSTMENT OF VCR AND CAMERA.............................................................................................6
7. SYSTEM BLOCK DIAGRAMS ............................................................................................................ 8
8. SCHEMATIC DIAGRAMS ................................................................................................................. 16
10.PRINTED WIRING BOARD ASSEMBLIES...................................................................................... 56
11.REPLACEMENT PARTS LIST .......................................................................................................... 69
12.PACKING OF THE SET .................................................................................................................... 87
MODELS
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its
original condition and only parts identical to those specified
be used.
CONTENTS
VL-H880U
Page
SHARP CORPORATION
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
1
VL-H860U
VTVM
AC SCALE
1.5k ohms
10W
CONNECT TO
KNOWN EARTH
GROUND
TO EXPOSED
METAL PARTS
0.15 µF
TEST PROBE
0.15 µF
SONDE D'ESSAI
VERS PIECES
METALLIQUES
EXPOSEES
VTVM
ECHELLE CA
1.5KOHMS
10W
CONNECTER A
UNE MASSE DE
TERRE CONNUE
VL-H880U
1. IMPORTANT SERVICE NOTES
BEFORE RETURNING THE VIDEO CAMERA
RECORDER
Before returning the video camera recorder to the user,
perform the following safety checks.
1. Inspect all lead dress to make certain that leads are
not pinched or that hardware is not lodged between
the chassis and other metal parts in the video camera
recorder.
2. Inspect all protective devices such as non-metallic
control knobs, insulating materials, cabinet backs,
adjustment and compartment covers or shields, isolation resistor/capacitor networks, mechanical insulators etc.
3. To be sure that no shock hazard exists, check for
leakage current in the following manner.
· Plug the AC line cord directly into a 120 volt AC outlet
(Do not use an isolation transformer for this test).
· Using two clip leads, connect a l.5k ohm, 10 watt resistor
paralleled by a 0.15µF capacitor in series with all
exposed metal cabinet parts and a known ground,
such as a water pipe or conduit.
· Use a VTVM or VOM with 1000 ohm per volt, or higher
sensitivity or measure the AC voltage drop across the
resisor (See Diagram).
· Move the resistor connection to all exposed metal
parts having a return path to the chassis (antenna
VL-H870U
VL-H875U
VL-H890U
connections, metal cabinet, screw heads, knobs and
control shafts, etc.) and measure the AC voltage drop
across the resistor. Reverse the AC plug (a non
polarized adaptor plug must be used but only for the
purpose of completing these checks) on the set and
repeat the AC voltage measurements for each exposed metallic part. Any reading of 0.45V rms (this
corresponds to 0.3mA rms AC.) or more is excessive
and indicates a potential shock hazard which must be
corrected before returning the video camera recorder
to the user.
AVANT DE RENDRE LE MAGNETOSCOPE
Avant de rendre le magnétoscope à l’utilisateur, effectuer
les vérifications de sécurité suivantes.
1. Vérifier toutes les gaines de fil pour être sûr que les fils
2. Vérifier tous les dispositifs de protection tels que les
3. Pour être sûr qu’il n’y a aucun risque de choc électrique,
· Brancher le cordon d’alimentation secteur directement
· Utiliser deux fils à pinces et connecter une résistance
· Utiliser un VTVM ou VOM avec une sensibilité de
· Déposer la connexion de la résistance à toutes les
1. NOTES DE SERVICE IMPORTANTES
ne sont pas pincés ou que le matériel n’est pas coincé
entre le châssis et les autres pièces métalliques dans le
magnétoscope.
boutons de commande non métalliques, les matériaux
d’isolement, le dos du coffret, les couvercles de
compartiment et ajustement ou les boucliers, les
réseaux de résistance / condensateur d’isolement,
Ies isolateurs mécaniques, etc.
vérifier le courant de fuite de la maniére suivante.
dans une prise de courant de 120 volts. (Ne pas
utiliser de transformateur d’isolement pour cet essai).
de 10 watts 1,5 kohm en parallèle avec un
condensateur de 0,15 µF en série avec des pièces du
coffret métallique exposées et une masse de terre
connue telle qu’un tuyau ou un conduit d’eau.
1000 ohms par volt ou plus ou mesurer la chute de
tension CA entre la résistance (voir diagramme).
pièces métalliques exposées ayant un parcours de
retour au châssis (connexions d’antenne, coffret
métallique, tétes de vis, boutons et arbres de commande,
etc.) et mesurer la chute de tension CA entre la résistance.
Inverser la fiche CA (une fiche intermédiaire non polarisée
doit être utilisée à seule fin de faire ces vérifications.) sur
l’appareil et répéter les mesures de tension CA pour
chaque piéce métallique exposée. Toute lecture de
0,45 V rms (ceci correspond à 0,3 mA rms CA) ou plus
est excessive et signale un danger de choc qui doit être
corrigé avant de rendre le magnétoscope à son
utilisateur.
2
VL-H870U
1.5A 250V
VL-H875U
VL-H890U
WARNING :TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE
THIS APPLIANCE T O WET LOCA TIONS.
CAUTION
RISK OF ELECTRIC SHOCK
CAUTION: TO REDUCE THE RISK OF ELECTRIC
SHOCK. DO NOT REMOVE COVER. NO
USER·SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE
PERSONNEL.
DO NOT OPEN
CAUTION
This symbol mark means following.
For continued protection against fire hazard, replace only with same type fuse.
(CP901; 1.2A 72V, CP902; 1.2A 72V,
CP903; 1.2A 72V)
Camcorder
only
VL-H860U
VL-H880U
This symbol warns the user of uninsulated
voltage within the unit that can cause dangerous electric shocks.
This symbol alerts the user that there are
important operating and maintenance instructions in the literature accompanying this unit.
CAUTION
This symbol mark means following.
For continued protection against fire haz-
ard, replace only with same type fuse.
(F1; 1.5A 250V)
AC Adapter
only
ATTENTION:POUR REDUIRE LES RESQUES D'INCENDIE OU DE CHOC ELECTRIQUE,
NE PAS EXPOSER CET APP AREIL A LA PLUIE OU A L'HUMIDITE.
ATTENTION
RISQUE DE CHOC ELECTRIQUE
NE PAS OUVRIR
ATTENTION: AFIN DE REDUIRE LES RISQUES DE
CHOC ELECTRIQUE, NE PAS RETIRER LE
COUVERCLE, AUCUN ORGANE INTERNE
NE PEUT ETRE REPARE PAR
L'UTIUSATEUR, CONFIER L'APPAREIL A
UN DEPANNEUR QUALIFIE.
ATTENTION
Ce symbole signifie que l'on devra utiliser un fusible de même type (CP901;
1.2A 72V, CP902; 1.2A 72V, CP903;
1.2A 72V) pour assurer la sécurité.
Camcorder
seulement
Ce symbole signale à l'utilisateur la présence
d'une tension non isolée à l'intérieur de l'appareil
qui peut être la cause de secousses électriques
dangereuses.
Ce symbole avertit l'utilisateur que des instructions importantes relatives à l'utilisation
et àl'entretien se trouvent dans le manuel
accompagnant l'appareil.
ATTENTION
Ce symbole signifie que l'on devra uti-
liser un fusible de même type (F1; 1,5A,
250V) pour assurer la sécurité.
3
Adaptateur CA
seulement
1,5A 250V
VL-H860U
VL-H880U
2. SPECIFICATIONS
Signal System: NTSC standard
Recording System: 2 rotary heads, helical scanning system
Cassette: 8 mm video tape, MP type or Hi8 MP, ME type
Recording/Playback Time: 120 minutes (P6-120)
Tape Speed: 14.345 mm/second
Pickup Device: 1/4" (6.4mm, effective size: 4.5 mm) CCD image sensor (with approx.
410,000 pixels including optical black)
Lens: 22 × power zoom lens (F1.6, f=4.0-88.0 mm) and full-range auto focus
Lens Filter Diameter: 46 mm
Monitor: 3" (7.5 cm) (VL-H860U)
3.5" (8.8 cm) (VL-H880U)
full-color LCD screen (TFT active matrix)
Microphone: Electret stereo microphone
Color Temperature Compensation: Auto white balance with white balance lock
Minimum Illumination: 4 lux (15 lux measured by EIA standard) (with gain-up, F1.6)
Video Output Level: 1.0 Vp-p 75-ohm unbalanced
Audio Output Level: –8 dBs, impedance less than 2.2 kohms
Speaker Output: 200 mW
External Microphone Input: 3.5 mm diameter mini-plug, –66 dBs, output impedance 6.8kohms, DC
4 V, for plug-in-power microphone use
Power Requirement: DC 7.4V
Power Consumption:
Operating Temperature: 0°C to + 40°C (32°F to 104°F)
Operating Humidity: 30% to 80%
Storage Temperature: –20°C to +60°C (–4°F to 140°F)
Dimensions (approx.): 7
Weight (approx.): 1.62 lbs 735g (VL-H860U)
4.9W (VL-H860U)
5.3W (VL-H880U)
(during camera recording in full auto mode with zoom motor off, Extend
Zoom, DIS and Snapshot functions off, and backlight in normal mode)
3
/32" (W) × 4 13/32" (H) × 4 7/32" (D)
[180 mm (W) × 112 mm (H) × 107 mm (D)]
1.63 lbs 740g (VL-H880U)
(without battery pack, lithium battery, video cassette, and lens cap)
VL-H870U
VL-H875U
VL-H890U
AC Adapter UADP-0303TAZZ
(VL-H860U/H880U)
AC Adapter UADP-0304TAZZ
(VL-H860UA/H860UC/H860UW)
Power Requirement: AC 110-240 V, 50/60 Hz
DC Output: 9.0 V
Dimensions (approx.): 1
Battery Pack BT-L241
DC Output: 7.4V
Weight (approx.): 0.21 lbs (97 g)
9
/16" (W) × 1 11/16" (H) ×
1
2
/8" (D)
[40 mm (W) × 43 mm (H) ×
54 mm (D)]
Power Consumption: 15 W
Dimensions (approx.): 2
11
/16" (W) × 1 15/32" (H) × 5
13
/32" (D)
[68 mm (W) × 37 mm (H) ×
137 mm (D)]
Weight (approx.): 0.73 lbs (330 g)
Specifications are subject to change without notice.
SERVICE INFORMATION (For the U.S.)
For the location of the nearest Sharp Authorized Service, or to obtain product literature, accessories,
supplies or customer assistance, please call 1-800-BE SHARP (1-800-237-4277) or visit SHARP's
website (http://www.sharp-usa.com)
4
VL-H870U
VL-H875U
VL-H890U
3. PART NAMES AND FUNCTION
For details on the use of each control.
VL-H860U
VL-H880U
5
VL-H860U
(I)
(3)
(a)
(D)
(J)
(1)
(K)
(C)
(4)
(2)
(F)
(G)
(H)
VL-H880U
4. DISASSEMBLY OF THE SET
4-1. DISASSEMBLY OF THE VCR PARTS
<8. Removal of LCD Unit>
(C)LCD Panel
(D)LCD Holder A
(F) Prism Sheet
(G)Diffusion Sheet
(H)Light Guide Plate
(I) Reflection Polarizing Sheet
(J) Lamp Inverter
(K) LCD Holding Sheet
•At the time of removing from the LCD Holder A(D), and take off the hooks(1)(2pcs.).
•At the time of removing from the LCD Holder A(D), take off (K), remove the FPC from
the hooks(3)(2pcs.), disengage the claw(2), and slide the LCD Panel (C) in the (a)
direction to remove the LCD Holder A (D).
•At the time of removing from the LCD Holder A(D), remove the claws (4)(2pcs.).
``
` Refer to the item CABINET EXPLODED VIEW about other parts.
``
VL-H870U
VL-H875U
VL-H890U
6. ADJUSTMENT OF VCR AND CAMERA
6-1. INITIAL SETTING OF E2PROM IC
6-1-2. IC703 (E2PROM)
When the IC703 has been replaced, make the following settings and
adjustments.
3. Setting up the V ADJ mode as follows.
* After press the CONTINUE key, press the VCR ADJ key on service
remote control (RRMCG0033TASA).
address data data
03 (Specificaton code) 4D 4D
02 (Country code) 01 01
6-3. ADJUSTMENT OF VCR SECTION
6-3-2. Servicing the VCR section Adjustment
6-3-2-1. Typical connections
<Extension Cable etc.>
12345
1. Extension Cable
Inverter~VCR (7pin
2. QCNW-1265TAZZ
3. AX
6
1. Extension Cable
Camera~VCR (18pin)
)
2. QCNW-1270TAZZ
3. AY
7
1. Extension Cable
Camera~VCR (19pin)
2. QCNW-1381TAZZ
3. AX
8
Configuration
<Note: The entries of list> 1. Name 2. Part No. 3. Code
4. Note * Model, Uses Remarks
1. Extension Cable
MECHA~VCR (70pin)
2. QCNW-1534TAZZ
3. BS
H860U H880U
1. Extension Cable LCD~
VCR (24pin)
2. QCNW-1382TAZZ
3. BD
1. Operation Unit
2.
QSW-Z0287TAZZ
3.
AW
1. Service remote control
RRMCG0033TASA
2.
3. BT
1. DC-IN Jack Unit
QJAKZ0069TAZZ
2.
3. AK
1. AV Jack Unit
2. QJAKZ0070TAZZ
3. AX
· Alignment Tape
JiGWR5-5NSP (NTSC) .... Normal 8 TAPE (MONO)
insulating sleeve
1. Connector fitting and
withdrawing extractor
1. Connector fitting and
withdrawing tweezers
2. 9EQPiNSET06GE
3. BR
JiGWR5-8NSE (NTSC) ... Hi8 TAPE (MONO)
* Y/C Audio Alignment
· Standard Tape
JiGWR5-9NS(NTSC).......Hi8 TAPE (STEREO)
6
VL-H870U
VL-H875U
VL-H890U
8
6
4
MECHA
UNIT
VCR
UNIT
7
2
3
VL-H860U
VL-H880U
CAMERA
UNIT
LCD
UNIT
INVERTER
5
1
6-3-2-3. Battery shut-off voltage adjusting method
1) Supply power to the main unit, using the variable-voltage DC power supply (range of 5.0V to 9V).
2) Set the CAM/OFF/VCR SW to CAM to switch to the camera mode.
3) Load a recordable tape and set the main unit to CAM REC. PAUSE.
4) Set the main unit to TEST mode No. 3, and start recording.
5) Measure voltage between TL2918(+) and TL2904(GND), and adjust the supply voltage to 6V.
6) The adjustment is complete if "BATTERY" is displayed on the monitor screen for a second when the PLAY key of operation unit
is pressed.
7) The adjustment is regarded as proper if the auto shut-off is actuated after the warning is displayed when the TEST mode is
cancelled.
* In case of automatic adjustment of shut-off voltage, adjustment is impossible if voltage is above 6V ± 0.2V.
If the adjustment is made at 5.9V or below, the low-voltage operation may become unstable.
6-3-7. Adjustment of LCD display circuit
Adjustment procedures and connections are the same as with the VCR section.
2. OSD Position Setting
VCR ADJ
Address Data
14 A8
7
VL-H860U
VL-H880U
7. SYSTEM BLOCK DIAGRAMS
7-1. VCR SECTION BLOCK DIAGRAM Y/C recording signal frow
SC902 IC1401 IC401 IC7451 CN7401
VL-H870U
VL-H875U
VL-H890U
Signal waveform
(2), (6), (7), (8), (9)
2
4
39 22 26
24 20 24
14 18
49 1 3
41 7 5 61
13
58
12 17 15
(1), (3) (4), (5)(10), (11)
Y SIGNAL :
C SIGNAL :
YC SIGNAL :
CN7401
(5)
58
61
3 1
IC7451
5
(2)
SC902
4
2
(1)
(4)
(9)
13
15
(3)
24
22
20
39
(11)
7
14
12
IC1401
(6)
(8)
49
IC401
41
17
2418
26
(7)
(10)
8
VL-H870U
VL-H875U
VL-H890U
7-2. VCR SECTION BLOCK DIAGRAM Y/C playback signal frow
CN7401 IC8301 IC401 IC1401
8
10
Signal waveform
(1), (2), (9) (10), (11), (12), (13), (14) (8)(4), (5), (6), (7)(3)
13 1
2
43
8
3
14
171812
15
13
343643
48
476
20
10
26
22
52
60
51
51
50 41 2
38 7
VL-H860U
VL-H880U
SC601
45 4
Y SIGNAL :
C SIGNAL :
YC SIGNAL :
(1)
10
8
6
CN7401
(9)
(6)
(14)
(3)
IC401
51
52
18
(7)
47
43
38
36
34
20
26
(8)
(11)
(5)
(10)
SC601
7
4
2
3
8
(13)
(2)
IC8301
1
2
13
41
43
45
48
IC1401
22
14
12
10
(12)
50
51
60
13
15
17
(4)
9
VL-H860U
VL-H880U
7-3. VCR SECTION BLOCK DIAGRAM Y/C EE signal frow
IC1401 IC800 CN1800
5
3
SC902
58
56
45
48
43 34
4
24 20 24
IC401
36
VL-H870U
VL-H875U
VL-H890U
19
9
21
10
24
11
4
738
SC601
Signal waveform
(14)
Y SIGNAL :
C SIGNAL :
YC SIGNAL :
2
(1), (3), (4), (5), (11), (13)(2), (7), (8), (9), (10), (12)
39 22 26
60 52
51
50
41 2
(6)
51
(16) (15)
(1)
SC902
4
2
(16)
CN1800
11
10
9
(15)
(14)
SC601
2
4
7
5
3
19
21
IC800
24
(4)
51
52
(2)
(6)
38
36
34
26
(10)
(8)
(12)
(13)
(5)
IC401
(3)
2024 22
39
41
43
45
48
IC1401
56
50
58
51
60
(7)
24
(11)
(9)
10
VL-H870U
VL-H875U
VL-H890U
7-4. AUDIO BLOCK DIAGRAM
INT
27
30
EXT
INT
1
34
EXT
INT MIC
RMiCC0086TA
P6601
INT MIC R
MIC GND
INT MIC L
3
2
1
MIX
DL
25
24
25
AMP
AMP EQ
3 4 5
DL
MIX
VL-H860U
VL-H880U
IC6601
LA7471M
20
EQ
SC601
8
EXT-MiC_L_IN
EXT-MiC_R_IN
AUDIO GND
AUDIO-R in/out
AUDIO GND
AUDIO-L in/out
IC1602 BA7785FS
2
AMP
18
17
16
11
10
9
SPEAKER
P201
SP (-)
SP (+)
VSP0028-50WN
1
2
IC602
TC4W66U
MUTE
MUTE
6
5 50
1
2
IC601
CXA1737R
52
62
64
FADE
DC
SHIFT
OUTPUT
SWITCHING
DC
SHIFT
MIC
LINE
DET
AGC
FADE
AGC
MATRIX
MIC
LINE
44 45 44 43
REC
AUDIO
LPF
PB
4
AMP
6
AMP
7
LEVEL
GCA
A
PB
PB
REC
PB
REC
AUDIO
LPF
REC
2 3
SENSOR
B
LPF
PB
REC
REC
PB
REC
B
PB
A
PB
GCA
6 7 8 94
REC
LPF
LIMITER
VCO
LPF
LEVEL
SENSOR
PB
SW
DET
LIMITER
BPF
REC
NR
1.5MHz
PLL
DOD DETECTION
CIRCUIT
1.5MHz BPF
PLAYBACK
FR AGC
1.7MHz BPF
LIMITER MIX
VCO
SW
LIMITER
PB
MUTE DETECTION
CIRCUIT
STEREO
ON
LPF
DET
NR
MONO
MULTI
ST MONO
1.5MHz
PLL
14
13
BTL
31
24
23
22
20
H.SW-P
REC AFM
BPF MONO
PB AFM
REC MONO
SC902
SP (-)
SP (-)
SP (+)
SP (+)
19
18
17
16
AFADE
11
VL-H860U
63 AV REC-H
PB
REC
SC305
SC305 Q307
SC305
SC305
SC305
IC 301
REC/PB AMP IC
VCC
RECORDING
AMPLIFIER
CH-1
SC305
SC305
SC305
SC305
SC301
SC301
ROTALY
ERASING
HEAD
VIDEO HEAD
L
(CH-2)
VIDEO HEAD
R
(CH-1)
ROTALYTRANSFORMER
Q315
6 PB RF
64 H-SW-P
65 OVER-P
61 REC-Y
58 REC-C
8 AGC IN
10 PB Y FM
67
D.O. PULSE
4
ROT ERASE
BUF
VGC
11
3
Q315
2
30
9
28
9
7
5
32
4
FF30
Y
AMP
AGC
DOC
PLAYBACK
AMPLIFIER
CH-2
RECORDING
AMPLIFIER
CH-1
ERASING OSCILLATOR
SWITCH CH-2
ERASING
OSCILLATOR
PLAYBACK
AMPLIFIER
CH-2
R339
24
27 13
a
a
1FE (S)
SC301
5L (S) (REC)
SC301
6L (F) (PB)
SC301
9R (S) (REC)
SC301
8R (F) (PB)
SC305
Q302
(10) (11)
35HOT
2FE (F)
18
23
BUF
14
17
VL-H880U
7-5. HEAD AMP BLOCK DIAGRAM
Hi8MP 110mVp-p
Hi8ME 150mVp-p
Signal waveform
(10) TL35 (Pin (35) of P1)
(11) TL35 (Pin (35) of P1)
Hi8MP 30mVp-p
Hi8ME 30mVp-p
VL-H870U
VL-H875U
VL-H890U
12
VL-H870U
VL-H875U
VL-H890U
7-6. POWER SYSTEM BLOCK DIAGRAM
Lithium ion 2 cell
VL-H860U
VL-H880U
DRUM
ERROR
CAP
ERROR
Power control IC (VHiMB3825,6·CH)
CH1 ERROR AMP.
1
2
3
4
5
6
IN- Comparator section
IN+
CH2 ERROR AMP.
IN- Comparator section
IN+
CH3 ERROR AMP.
IN- Comparator section
IN+
CH4 ERROR AMP.
IN- Comparator section
IN+
CH5 ERROR AMP.
IN- Comparator section
IN+
CH6 ERROR AMP.
IN- Comparator section
IN+
Standard
power
CH1 output
Drive circuit
(Voltage drop)
CH2 output
Drive circuit
(Voltage drop)
CH3 output
Drive circuit
(Voltage drop)
CH4 output
Drive circuit
CH5 output
Drive circuit
(Voltage drop)
CH6 output
Drive circuit
(Voltage drop)
4.9V Power
Valtage drop circuit
(PNP Tr)
3.3V Power
Valtage drop circuit
(PNP Tr)
Trans circuit
(NPN)
CAM 2.8V
Valtage drop circuit
(PNP Tr)
DRUM VS
Valtage drop circuit
(PNP Tr)
CAP VS
Valtage drop circuit
(PNP Tr)
P-CON 4.9V
1
CAM 4.9V
2
3
4
5
6
P-CON 3.3V
CAM 3.3V
LCD 13.2V
LCD 7V
LCD -7V
LCD -15V
CAM 15V
CQAM-9V
CAM 2.8V
DRUM
DRIVER
CAP
DRIVER
YC-7V
7
8
B/L CTL
TRIANGLE
WAVE
OSC
Standard
power
CH1 ERROR AMP.
IN- Comparator section
IN+
CH2 ERROR AMP.
IN= Comparator section
IN+
CH1 output
Drive circuit
(PNP)
CH2 output
Drive circuit
(PNP)
Mecha 5V Power
Voltage drop circuit
(PNP Tr)
B/L POW
Voltage drop circuit
(PNP Tr)
7
MACHA5V/SP5V
LENS 5V
8
BACK
LIGHT
INV
13
VL-H860U
Q2903 with FET always is "OFF" at DC input.
SYS 3.3V
REG circuit
NON REG 7.2V
ADP-DET
Vcc
DC input lived
DC input "ON"
"OFF" detection
Battery voltage
detection
BATT.-DET
When the battery
is installed , its
turned "ON".
CHARGE-ON_L
System microcomputer
VCR-H
RESET
CHG SW
Charge control IC
Current control
circuit section
Current
detective
section
Voltage
detective
section
LED RedLED Green
Charging : Red light up
Completion : Green light up
LED_R
LED_G
Vcc
with JACK : OPEN
with out JACK : GND Short circuit
DC JACK input
Voltage detective
circuit
Q2901
Q2903
Lithium
ion battery
V
DC
<11V
V
BATT
=0
Charging off
VL-H880U
7-7. MAIN BATTERY CIRCUIT SECTION BLOCK DIAGRAM
VL-H870U
VL-H875U
VL-H890U
14
VL-H870U
VL-H875U
VL-H890U
VL-H860U
VL-H880U
- M E M O -
15
VL-H860U
VL-H880U
8. SCHEMATIC DIAGRAMS 8-1. OVERALL SCHEMATIC DIAGRAM
LOCATION MAP: (1/4)
4
132
S
R
Q
P
O
N
M
L
K
J
16
VL-H860U
VL-H880U
LOCATION MAP: (2/4)
4
132
10
9
8
7
6
5
4
3
2
1
J
I
H
G
F
E
D
C
B
A
17
VL-H860U
VL-H880U
LOCATION MAP: (3/4)
4
132
S
R
Q
P
O
N
M
L
K
J
18
VL-H860U
VL-H880U
LOCATION MAP: (4/4)
4
132
19
18
17
16
15
14
13
12
11
10
J
I
H
G
F
E
D
C
B
A
19
VL-H860U
VL-H880U
8-2. AUDIO CIRCUIT SCHEMATIC DIAGRAM
LOCATION MAP: (1/4)
4
132
S
R
Q
P
O
N
M
L
K
J
20
VL-H860U
VL-H880U
LOCATION MAP: (2/4)
4
132
10
9
8
7
6
5
4
3
2
1
J
I
H
G
F
E
D
C
B
A
21
VL-H860U
VL-H880U
LOCATION MAP: (3/4)
4
132
S
R
Q
P
O
N
M
L
K
J
22
VL-H860U
VL-H880U
LOCATION MAP: (4/4)
4
132
19
18
17
16
15
14
13
12
11
10
J
I
H
G
F
E
D
C
B
A
23
VL-H860U
VL-H880U
8-4. CHARGE CIRCUIT SCHEMATIC DIAGRAM
J
I
H
G
F
E
D
C
B
A
12345678910
24
VL-H860U
VL-H880U
å AND SHADED COMPONENTS=SAFETY RELATED PARTS
å
å
10 11 12 13 14 15 16 17 18 19
25
VL-H860U
VL-H880U
8-5. YCPROCESS CIRCUIT SCHEMATIC DIAGRAM
LOCATION MAP: (1/4)
4
132
S
R
Q
P
O
N
M
L
K
J
26
VL-H860U
VL-H880U
LOCATION MAP: (2/4)
4
132
10
9
8
7
6
5
4
3
2
1
J
I
H
G
F
E
D
C
B
A
27
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