JVC AV-29FH1BUG, AV-29FH1SUG service manual

SERVICE MANUAL

COLOUR TELEVISION

YA00820039

AV-29FH1BUG,

AV-29FH1SUG

TABLE OF CONTENTS

1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED

No.YA008

2003/9

SPECIFICATION

Items

Dimensions ( W I H I D )81.2cm I 60.1cm I 52.2cm
Mass40kg
TV RF SystemCCIR (B/G, D/K, I , L/L')
Colour SystemPAL / SECAM / NTSC (Only in EXT mode)
Stereo SystemA2 (B/G, D/K) / NICAM (B/G, I, D/K, L)
Teletext SystemFastext (UK system)

TOP (German system)
WST(World standard system)

Receiving
Frequency

Intermediate
Frequency

Colour Sub
Carrier Frequency

Power InputAC220V ~ AC240V, 50Hz
Power Consumption84W, standby : 3W
Aerial Input Terminal75 unbalanced, coaxial
Picture TubeVisible size : 68cm (Measured diagonally)
Audio Power Output7W + 7W
EXT-1 / EXT-2 (Input / Output) 21-pin Euro connector (SCART socket I 2)
EXT-3 (Input) Video1V(p-p) 75 (RCA pin jack I 1)

Headphone JackStereo mini jack (Ø3.5mm) I 1
Remote Control UnitRM-C1514B (AAA/R03 dry battery I 2)RM-C1514 (AAA/R03 dry battery I 2)

Design & specifications are subject to change without notice.

VHF47MHz ~ 470MHz
UHF470MHz ~ 862MHz
French CATV116MHz ~ 172MHz / 220MHz ~ 469MHz
VIF Carrier38.9MHz (B/G, D/K, I , L) / 33.95MHz (L')
SIF Carrier33.4MHz (5.5MHz:B/G)

/ 32.9MHz (6.0MHz:I)
/ 32.4MHz (6.5MHz:L, D/K)

/ 40.45MHz (6.5MHz:L')
PAL4.43MHz
SECAM4.40625MHz / 4.25MHz
NTSC3.58MHz / 4.43MHz

Audio (L/R)500mV(rms) (-4dBs), High impedance (RCA pin jack I 2)

AV-29FH1BUGAV-29FH1SUG

Contents

1-2 (No.YA008)

SECTION 1

PRECAUTION

1.1SAFETY PRECAUTIONS

(1)The design of this product contains special hardware,

many circuits and components specially for safety
purposes. For continued protection, no changes should be
made to the original design unless authorized in writing by
the manufacturer. Replacement parts must be identical to
those used in the original circuits. Service should be
performed by qualified personnel only.

(2)Alterations of the design or circuitry of the products should

not be made. Any design alterations or additions will void
the manufacturer's warranty and will further relieve the
manufacturer of responsibility for personal injury or
property damage resulting therefrom.

(3)Many electrical and mechanical parts in the products have

special safety-related characteristics. These
characteristics are often not evident from visual inspection
nor can the protection afforded by them necessarily be
obtained by using replacement components rated for
higher voltage, wattage, etc. Replacement parts which
have these special safety characteristics are identified in
the parts list of Service manual. Electrical components

having such features are identified by shading on the
schematics and by ( ) on the parts list in Service
manual. The use of a substitute replacement which does

not have the same safety characteristics as the
recommended replacement part shown in the parts list of
Service manual may cause shock, fire, or other hazards.

(4) Don't short between the LIVE side ground and

ISOLATED (NEUTRAL) side ground or EARTH side
ground when repairing.

Some model's power circuit is partly different in the GND.
The difference of the GND is shown by the LIVE : ( ) side
GND, the ISOLATED (NEUTRAL) : ( ) side GND and
EARTH : ( ) side GND.
Don't short between the LIVE side GND and ISOLATED
(NEUTRAL) side GND or EARTH side GND and never
measure the LIVE side GND and ISOLATED (NEUTRAL)
side GND or EARTH side GND at the same time with a
measuring apparatus (oscilloscope etc.). If above note will
not be kept, a fuse or any parts will be broken.

(5)If any repair has been made to the chassis, it is

recommended that the B1 setting should be checked or
adjusted (See B1 POWER SUPPLY check).

(6)The high voltage applied to the picture tube must conform

with that specified in Service manual. Excessive high
voltage can cause an increase in X-Ray emission, arcing
and possible component damage, therefore operation
under excessive high voltage conditions should be kept to
a minimum, or should be prevented. If severe arcing
occurs, remove the AC power immediately and determine
the cause by visual inspection (incorrect installation,
cracked or melted high voltage harness, poor soldering,
etc.). To maintain the proper minimum level of soft X-Ray
emission, components in the high voltage circuitry
including the picture tube must be the exact replacements
or alternatives approved by the manufacturer of the
complete product.

(7)Do not check high voltage by drawing an arc. Use a high

voltage meter or a high voltage probe with a VTVM.
Discharge the picture tube before attempting meter
connection, by connecting a clip lead to the ground frame
and connecting the other end of the lead through a 10k
2W resistor to the anode button.

(8)When service is required, observe the original lead dress.

Extra precaution should be given to assure correct lead
dress in the high voltage circuit area. Where a short circuit
has occurred, those components that indicate evidence of
overheating should be replaced. Always use the
manufacturer's replacement components.

(9) Isolation Check (Safety for Electrical Shock Hazard)

After re-assembling the product, always perform an
isolation check on the exposed metal parts of the cabinet
(antenna terminals, video/audio input and output terminals,
Control knobs, metal cabinet, screw heads, earphone jack,
control shafts, etc.) to be sure the product is safe to operate
without danger of electrical shock.

a) Dielectric Strength Test

The isolation between the AC primary circuit and all metal
parts exposed to the user, particularly any exposed metal
part having a return path to the chassis should withstand a
voltage of 3000V AC (r.m.s.) for a period of one second. (.
. . . Withstand a voltage of 1100V AC (r.m.s.) to an
appliance rated up to 120V, and 3000V AC (r.m.s.) to an
appliance rated 200V or more, for a period of one second.)
This method of test requires a test equipment not generally
found in the service trade.

b) Leakage Current Check

Plug the AC line cord directly into the AC outlet (do not use
a line isolation transformer during this check.). Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal part of the cabinet, particularly
any exposed metal part having a return path to the chassis,
to a known good earth ground (water pipe, etc.). Any
leakage current must not exceed 0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.2mA AC
(r.m.s.).

Alternate Check Method

Plug the AC line cord directly into the AC outlet (do not
use a line isolation transformer during this check.). Use
an AC voltmeter having 1000 per volt or more
sensitivity in the following manner. Connect a 1500
10W resistor paralleled by a 0.15kF AC-type capacitor
between an exposed metal part and a known good earth
ground (water pipe, etc.). Measure the AC voltage
across the resistor with the AC voltmeter. Move the
resistor connection to each exposed metal part,
particularly any exposed metal part having a return path
to the chassis, and measure the AC voltage across the
resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Any voltage measured must
not exceed 0.75V AC (r.m.s.). This corresponds to

0.5mA AC (r.m.s.).
However, in tropical area, this must not exceed 0.3V AC
(r.m.s.). This corresponds to 0.2mA AC (r.m.s.).

AC VOLTMETER
(HAVING 1000/V,
OR MORE SENSITIVITY)

0.15F AC-TYPE

PLACE THIS PROBE

1500 10W

GOOD EARTH GROUND

ON EACH EXPOSED
METAL PART

(No.YA008)1-3

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.121-pin Euro connector (SCART) : EXT-1/EXT-2
Pin No.Signal designationMatching valueEXT-1EXT-2

1AUDIO R output500mV(rms) (Nominal), Low impedanceUsed (TV OUT)Used (LINE OUT)
2AUDIO R input500mV(rms) (Nominal), High impedanceUsed (R1)Used (R2)
3AUDIO L output500mV(rms) (Nominal), Low impedanceUsed (TV OUT)Used (LINE OUT)
4AUDIO GND---UsedUsed
5GND (B)---UsedUsed
6AUDIO L input500mV(rms) (Nominal), High impedanceUsed (L1)Used (L2)
7B input700mV
8FUNCTION SW (SLOW SW)Low : 0V-3V, High : 8V-12V, High impedanceUsedNC

9GND (G)---UsedNC
10SCL / T-V LINK---Not used NC
11G input700mV(B-W), 75 UsedNC
12SDA---Not used NC
13GND (R)---UsedUsed
14GND (YS)---UsedUsed
15R / C inputR : 700mV

C : 300mV
16Ys input (FAST SW)Low : 0V-0.4V, High : 1V-3V, 75 UsedNC
17GND (VIDEO output)---UsedUsed
18GND (VIDEO input)---UsedUsed
19VIDEO output1V
20VIDEO / Y input1V

(P-P)
(P-P)

21COMMON GND---UsedUsed

(P-P= Peak to Peak, B-W= Blanking to white peak)

, 75 UsedNC

(B-W)

(B-W)
(P-P)

, 75

, 75

Used (R)Used (C)

(Negative sync), 75 Used (TV OUT)Used (LINE OUT)
(Negative sync), 75 UsedUsed

1-4 (No.YA008)

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SECTION 3

DISASSEMBLY

3.1DISASSEMBLY PROCEDURE

3.1.1REMOVING THE REAR COVER

(1)Unplug the power cord.
(2)Remove the 8 screws [A].
(3)Remove the 1 screw [B].
(4)Withdraw the REAR COVER toward you.

3.1.2REMOVING THE SIDE SPEAKER

•Remove the REAR COVER.
(1)Remove the 4 screws [D], attaching the SPEAKER.
(2)Follow the same steps when removing the other hand

SPEAKER.

3.1.3REMOVING THE PFC FILTER PWB

•Remove the REAR COVER.
(1)Remove the 2 screws [C] as shown in the figure.
(2)Take off the 2 connectors linking chassis to PFC FILTER

PWB and withdraw the PFC FILTER PWB.

3.1.4REMOVING THE MAIN PWB

•Remove the REAR COVER.
(1)Slightly raise the both sides of the MAIN PWB by hand and

withdraw the MAIN PWB backward.
(If necessary, take off the wire clamp, connectors etc.)

FRONT CABINET

3.1.5CHECKING THE PW BOARD

•To check the back side of the PW Board.
(1)Pull out the MAIN PWB. (Refer to REMOVING THE MAIN

PWB).

(2)Erect the MAIN PWB vertically so that you can easily check

the back side of the PW Board.

3.1.6CAUTION

•When erecting the MAIN PWB, be careful so that there will be
no contacting with other PW Board.

•Before turning on power, make sure that the wire connector is
properly connected.

•When conducting a check with power supplied, be sure to con­firm that the CRT EARTH WIRE (BRAIDED ASS'Y) is connect­ed to the CRT SOCKET PW board.

3.1.7WIRE CLAMPING AND CABLE TYING

(1)Be sure to clamp the wire.
(2)Never remove the cable tie used for tying the wires

together.
Should it be inadvertently removed, be sure to tie the wires
with a new cable tie.

SPEAKER

D

PFC FILTER
PWB

C

SPEAKER

CRT SOCKET
PWB

MAIN PWB

D

FBT

POWER CORD

REAR COVER

B

A

(No.YA008)1-5

3.2REPLACEMENT OF MEMORY IC

3.2.1MEMORY IC

This TV use memory IC. In the memory IC, there are memorized data for correctly operating the video and deflection circuits. When
replacing memory IC with a blanking memory IC, the set is automatically memorized following SERVICE MANU initial data.

3.2.2SERVICE MENU ADJUSTMENT ITEMS

There are 21 SERVICE ADJUSTMENT ITEMS. After replacing
memory IC, automatically memorized following initial data.

No.Adjustment item

1HOR CEN
2RED GAIN
3GRN GAIN
4BLUE GAIN
5RED BIAS
6GRN BIAS
7AGC LEVEL
8G2-SCREEN

9AFT
10OPTION1
11OPTION2
12AVL
13PARABOLA
14HOR WIDTH
15CORNER T
16CORNER B
17HOR PARAL
18V. LINEAR
19EW TRAPEZ
20S CORRECT
21VERT CENT
22VERT SIZE
23SHIPPING

3.2.3FACTORY SETTING

3.2.3.1FRONT BUTTON SETTING AND INITIAL SEETING
ItemValue

MAIN POWEROFF(SUB POWER ON)
PR POSITION01
INPUT MODETV

3.2.3.2USER MENU SETTING
ItemValue

PICTURE
BRIGHTNESSCenter
CONTRASTCenter
COLOURCenter
SHARPNESSCenter
TINTCenter
NOISE RED.WEAK

SOUND
VOLUME18
BALANCECenter
BASSCenter
TREBLECenter

FEATURES
CHILD LOCKOFF
WAKE TIMEOFF
WAKE PROG.01
CLOCK--:-­CLOCK PROG01
PROG. INFOON
ZOOM AUTO4:3
LANGUAGEGB

INSTALL
ATSSOthers
EDIT
SYSTEMEURO
CHANNELC 02
FREQUENCY048. 25
NAME------­PROGRAM01
STORE TO01

1-6 (No.YA008)

3.3REPLACEMENT OF CHIP COMPONENT

3.3.1CAUTIONS

(1)Avoid heating for more than 3 seconds.
(2)Do not rub the electrodes and the resist parts of the pattern.
(3)When removing a chip part, melt the solder adequately.
(4)Do not reuse a chip part after removing it.

3.3.2SOLDERING IRON

(1)Use a high insulation soldering iron with a thin pointed end of it.
(2)A 30w soldering iron is recommended for easily removing parts.

3.3.3REPLACEMENT STEPS

1. How to remove Chip parts

2. How to install Chip parts

[Resistors, capacitors, etc.]

(1)As shown in the figure, push the part with tweezers and

alternately melt the solder at each end.

(2)Shift with the tweezers and remove the chip part.

[Transistors, diodes, variable resistors, etc.]

(1)Apply extra solder to each lead.

НСФЬЫО

НСФЬЫО

(2)As shown in the figure, push the part with tweezers and

alternately melt the solder at each lead. Shift and remove
the chip part.

[Resistors, capacitors, etc.]

(1)Apply solder to the pattern as indicated in the figure.

(2)Grasp the chip part with tweezers and place it on the

solder. Then heat and melt the solder at both ends of the
chip part.

[Transistors, diodes, variable resistors, etc.]

(1)Apply solder to the pattern as indicated in the figure.
(2)Grasp the chip part with tweezers and place it on the

solder.

(3)First solder lead A as indicated in the figure.

ß

Þ

NOTE :

After removing the part, remove remaining solder from the
pattern.

(4)Then solder leads B and C.

Ý

ß

Þ

Ý

(No.YA008)1-7

SECTION 4

ADJUSTMENT

4.1ADJUSTMENT PREPARATION

(1)There are 2 ways of adjusting this TV : One is with the REMOTE CONTROL UNIT and the other is the conventional method

using adjustment parts and components.
(2)Make sure that connection is correctly made AC to AC power source.
(3)Turn on the power of the TV and measuring instruments for warning up for at least 30 minutes before starting adjustments.
(4)If the receive or input signal is not specified, use the most appropriate signal for adjustment.
(5)Never touch the parts (such as variable resistors, transformers and condensers) not shown in the adjustment items of this service

adjustment.

4.2MEASURING INSTRUMENT AND FIXTURES

(1)DC voltmeter (or digital voltmeter)
(2)Signal generator (Pattern generator : PAL / SECAM / NTSC)
(3)Remote control unit.

4.3BASIC OPERATION OF SERVICE MENU

4.3.1TOOL OF SERVICE MENU OPERATION

Operate the SERVICE MENU with the REMOTE CONTROL UNIT.

4.3.2SERVICE ADJUSTMENT ITEMS

There are 23 adjustment items.

No.Adjustment itemNo.Adjustment item

1HOR CEN13PARABOLA
2RED GAIN14HOR WIDTH
3GRN GAIN15CORNER T
4BLUE GAIN16CORNER B
5RED BIAS17HOR PARAL
6GRN BIAS18V. LINEAR
7AGC LEVEL19EW TRAPEZ
8G2-SCREEN20S CORRECT

9AFT21VERT CENT
10OPTION122VERT SIZE
11OPTION223SHIPPING
12AVL

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4.3.3HOW TO ENTER SERVICE MENU

(1)Press [ i ](Information) key and [ ](Muting) key same time

then enter SERVICE MENU.
(2)Adjust sharpness to minimum and exit all menus.
(3)Within 2 seconds press the key sequence [RED]-[GREEN]-

[MENU]key.

4.3.4SELECTION OF MENU SCREEN

(1)Press [ ] / [ ] keys of the REMOTE CONTROL UNIT and

select adjustment item.

4.3.5SETTING VALUE OF ADJUSTMENT ITEMS

(1)Press [ ] / [ ] keys of the REMOTE CONTROL UNIT and

setting value of adjustment items.

4.3.6HOW TO EXIT SERVICE MENU

(1)Press [MENU] key, then exit SERVICE MENU.

1-8 (No.YA008)

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4.4ADJUSTMENT PROCEDURE

4.4.1LOCAL OSCILLATOR ADJUSTMENT

Item

AFT
adjustment

Measuring
instrument

Signal
generator

Test pointAdjustment partDescription

Remote
control unit

AFT
AFT coil : (L150)

[MAIN PWB]

(1)Receive a colour bar pattern signal.
(2)The frequency of the signal carrier must be accurate

(Max +/-10kHz deviation from the nominal channel

frequency).
(3)Select < AFT >.
(4)Adjust the AFT coil (L150) to bring the cursor to cen-

tral poison.

I502

I501

L150

I101

I702

I601

TUNER

4.4.2AGC

Item

AGC
adjustment

Measuring
instrument

Signal
generator

Remote
control unit

4.4.3FOCUS ADJUSTMENT

Item

FOCUS
adjustment

Measuring

instrument

Signal
generator

Remote
control unit

MAIN PWB

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FBT

Test pointAdjustment partDescription

AGC(1)Receive a colour bar pattern signal.

(2)Select < AGC >.
(3)Press the [OK] key and wait until AGC level stabilize

to the optimum value.

Test pointAdjustment partDescription

FOCUS VR
[On FBT]

(1)Receive a cross-hatch signal.
(2)Adjust the FOCUS volume on the FBT to have the

best resolution on the screen.

Ý«®-±®

FBT

FOCUS
SCREEN

(No.YA008)1-9

4.4.4SCREEN ADJUSTMENT

Item

SCREEN
adjustment

4.4.5WHITE BALANCE ADJUSTMENT

Item

WHITE
BALANCE
adjustment

4.4.6DEFLECTION CIRCUIT ADJUSTMENT

Item

VERTICAL
GEOMETORY
adjustment

Measuring

instrument

Signal
generator

Remote
control unit

Measuring

instrument

Signal
generator

Remote
control unit

Measuring

instrument

Signal
generator

Remote
control unit

Test pointAdjustment partDescription

Test pointAdjustment partDescription

Test pointAdjustment partDescription

G2-SCREEN
SCREEN VR

[On FBT]

RED BIAS
GRN BIAS

RED GAIN
GRN GAIN
BLUE GAIN

V. LINEAR
S CORRECT
VERT SIZE
VERT CENT

(1)Receive a colour bar pattern signal.
(2)Select < G2-SCREEN >.
(3)Adjust the SCREEN VR on the FBT to bring the

cursor to central position.

(1)Receive a black and white pattern signal (colour off).
(2)Select < RED BIAS >, < GRN BIAS > and adjust the

screen until the black portion in the screen becomes
black.

(3)Select < RED GAIN >, < GRN GAIN >, < BLUE GAIN >

and adjust the screen until the white portion in the
screen become white.

(1)Receive a circle pattern signal.
(2)Select < V. LINEAR >(Veretical linearity), < S

CORRECT > (S correction), < VERT SIZE >(Vertical
size), < VERT CENT >(Vertical center) respectively.

(3)Adjust to compensate for vertical distortion.

HORIZONTAL
POSITION
adjustment

1-10 (No.YA008)

Signal
generator

Remote
control unit

HOR CEN(1)Receive a circle pattern signal.

(2)Select < HOR CEN >(Horizontal center).
(3)Adjust to have the picture in the center of the screen.

Item

HORIZONTAL
GEOMETORY
adjustment

Measuring
instrument

Signal
generator

Remote
control unit

Test pointAdjustment partDescription

PARABOLA
HOR WIDTH
CORNER
HOR PARAL
EW TRAPEZ

PARABOLA

HOR WIDTH

(1)Receive a cross-hatch pattern signal.
(2)Select < PALABOLA >(Side pin), < HOR WIDTH >

(Horizontal width), < CORNER >(Top/bottom

corner), < HOR PARAL >(Horizontal parallel), < EW

TRAPEZ >(Trapezium).
(3)Adjust these items to compensate for geometrical

distortion.

CORNER

HOR PARAL

EW TRAPEZ

(No.YA008)1-11

SECTION 5

TROUBLESHOOTING

This service manual does not describe TROUBLESHOOTING.

1-12 (No.YA008)

VICTOR COMPANY OF JAPAN, LIMITED

AV & MULTIMEDIA COMPANY VIDEO DISPLAY CATEGORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, Japan

(No.YA008)

Printed in Japan

WPC

AV-29FH1SUG
AV-29FH1BUG

ENGLISH

DEUTSCH

FRANÇAIS

NEDERLANDS

CASTELLANO

ITALIANO

COLOUR TELEVISION

FARBFERNSEHGERÄT
TELEVISEUR COULEUR
KLEURENTELEVISIE
TELEVISOR A COLOR
TELEVISORE A COLORI
TELEVISOR A CORES

INSTRUCTIONS

BEDIENUNGSANLEITUNG

MANUEL D INSTRUCTIONS

GEBRUIKSAANWIJZING

MANUAL DE INSTRUCCIONES

ISTRUZIONI

INSTRUÇÕES

Thank you for buying this JVC colour television.
To make sure you understand how to use your new TV, please read this manual thoroughly
before you begin.

WATER AND MOISTURE

1.

The apparatus shall not be exposed to dripping or splashing water and no object filled with liquids, such as vases , should
be placed on the apparatus.

HEAT

2.

Never place the set near heat sources.
Never put a naked flame, such as a candle, on the top of TV set.

VENTILATION

3.

Do not cover the ventilation openings in the cabinet and never place the set in a confined space such as in a bookcase or
built-in cabinet unless proper ventilation is provided. Leave a minimum 10 cm gap all around the unit.

OBJECT ENTRY

4.

Do not insert foreign objects, such as needles and coins, in the ventilation openings.

LIGHTNING STRIKE

5.

You should disconnect the set from the mains and the aerial system during thunderstorms.

CLEANING

6.

Unplug the set from the mains while cleaning.

AFTER MOVING THE SET

7.

If the set is moved or turned, the MAIN POWER button must be switched off for at least 15 minutes in order to take out
colour patches on the screen.

CAUTION

8.

There is danger of choking or suffocation if the cap which is removed from the TV is accidentally swallowed by children.
Store the cap out of the reach of children.

TV-LINK FUNCTION

1

2

3

3

4
7

8

12

14

15

16