Panasonic Viera TH-50PZ800B User manual

ORDER NO. PCZ0805064CE
Service Manual
Plasma Television
Model No. TH-50PY800P
TH-50PZ800B
TH-50PZ800E
PF11DE Chassis
A WARNIN
This service information is esigne for experience repair technicians only an is not esigne for use by the general public.
It oes not contain warnings or cautions to a vise non-technical in ivi uals of potential angers in attempting to service a pro uct.
Pro ucts powere by electricity shoul be service or repaire only by experience professional technicians. Any attempt to service
or repair the pro uct or pro ucts ealt with in this service information by anyone else coul result in serious injury or eath.
Panasonic' © 2008 Matsushita Electric In ustrial Co., Lt . All
rights reserve . Unauthorize copying an istribu
tion is a violation of law.

1 Safety Precautions
1.1. eneral uidelines
1. When servicing, observe the original lea ress. If a short circuit is foun , replace all parts which have been overheate or
amage by the short circuit.
2. After servicing, see to it that all the protective evices such as insulation barriers, insulation papers shiel s are properly
installe .
3. After servicing, make the following leakage current checks to prevent the customer from being expose to shock hazar s.
4. When servicing, observe the original lea ress. If a short circuit is foun , replace all parts which have been overheate or
amage by the short circuit.
5. After servicing, see to it that all the protective evices such as insulation barriers, insulation papers shiel s are properly
installe .
After servicing, make the following leakage current checks to prevent the customer from being expose to shock hazar s.6
1.2. Touch-Current Check
1. Plug the AC cor irectly into the AC outlet. Do not use an isolation transformer for this check.
2. Connect a measuring network for touch currents between each expose metallic part on the set an a goo earth groun
such as a water pipe, as shown in Figure 1.
3. Use Leakage Current Tester (Simpson 228 or equivalent) to measure the potential across the measuring network.
4. Check each expose metallic part, an measure the voltage at each point.
5. Reserve the AC plug in the AC outlet an repeat each of the above measure.
6. The potential at any point (TOUGH CURRENT) expresse as voltage U1 an U2, oes not excee the following values:
For a. c.: U1 = 35 V (peak) an U2 = 0.35 V (peak);
For . c.: U1 = 1.0 V,
Note:
The limit value of U2 = 0.35 V (peak) for a. c. an U1 = 1.0 V for . c. correspon to the values 0.7 mA (peak) a. c. an 2.0
mA . c.
The limit value U1 = 35 V (peak) for a. c. correspon to the value 70 mA (peak) a. c. for frequencies greater than 100 kHz.
7. In case a measurement is out of the limits specifie , there is a possibility of a shock hazar , an the equipment shoul be
repaire an rechecke before it is returne to the customer.
Measuring network for TOUCH CURRENTS
COLD
WATER PIPE
(EARTH GROUND)
Rs=
1500Q_L Cs= 0.22|jF10kQ
-1 k 1
-------- 1
Ro=
----------------
J 500Q
'
U1 =
r
= 0.022|jF ( V )
JQ LjJ JUUii U1 —|— и.и^гфГ ^ V J | U2 (V)
APPLIANCES
EXPOSED
METAL PARTS
Resistance values in ohms (Q)
V: Voltmeter or oscilloscope
(r.m.s. or peak rea ing)
Input resistance: > 1 MQ
Input capacitance: < 200 pF
Frequency range: 15 Hz to 1 MHz an .c. respectively
NOTE - Appropriate measures shoul be taken to obtain the correct value in case of non-sinusoi al waveforms.
Figure 1
2

2 Warning
2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically
Sensitive (ES) Devices
Some semicon uctor (soli state) evices can be amage easily by static electricity. Such components commonly are calle Elec
trostatically Sensitive (ES) Devices. Examples of typical ES evices are integrate circuits an some fiel -effect transistors an
semicon uctor [chip] components. The following techniques shoul be use to help re uce the inci ence of component amage
cause by electrostatic ischarge (ESD).
1. Imme iately before han ling any semicon uctor component or semicon uctor-equippe assembly, rain off any ESD on your
bo y by touching a known earth groun . Alternatively, obtain an wear a commercially available ischarging ESD wrist strap,
which shoul be remove for potential shock reasons prior to applying power to the unit un er test.
2. After removing an electrical assembly equippe with ES evices, place the assembly on a con uctive surface such as alumi
num foil, to prevent electrostatic charge buil up or exposure of the assembly.
3. Use only a groun e -tip sol ering iron to sol er or unsol er ES evices.
4. Use only an anti-static sol er removal evice. Some sol er removal evices not classifie as [anti-static (ESD protecte )] can
generate electrical charge sufficient to amage ES evices.
5. Do not use freon-propelle chemicals. These can generate electrical charges sufficient to amage ES evices.
6. Do not remove a replacement ES evice from its protective package until imme iately before you are rea y to install it. (Most
replacement ES evices are package with lea s electrically shorte together by con uctive foam, aluminum foil or compara
ble con uctive material).
7. Imme iately before removing the protective material from the lea s of a replacement ES evice, touch the protective material
to the chassis or circuit assembly into which the evice will be installe .
Caution
Be sure no power is applie to the chassis or circuit, an observe all other safety precautions.
8. Minimize bo ily motions when han ling unpackage replacement ES evices. (Otherwise ham less motion such as the brush
ing together of your clothes fabric or the lifting of your foot from a carpete floor can generate static electricity (ESD) sufficient
to amage an ES evice).
IMPORTANT SAFETY NOTICE!
There are special components use in this equipment which are important for safety.
These parts are marke by Д in the schematic iagrams, Explo e Views an replacement parts list. It is
essential that these critical parts shoul be replace with manufacturer's specifie parts to prevent shock, fire, or
other hazar s. Do not mo ify the original esign without permission of manufacturer.
3

Note: Lead is listed as (Pb) in the periodic table of elements.
In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder.
The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu).
That is Tin (Sn), Silver (Ag) and Copper (Cu) although other types are available.
This mo el uses Pb Free sol er in it's manufacture ue to environmental conservation issues. For service an repair work, we'
suggest the use of Pb free sol er as well, although Pb sol er may be use .
PCBs manufacture using lea free sol er will have the PbF within a leaf Symbol PbF stampe on the back of PCB.
Caution
• Pb free sol er has a higher melting point than stan ar sol er. Typically the melting point is 50 ~ 70 °F (30~40 °C) higher. Please
use a high temperature sol ering iron an set it to 700 ± 20 °F (370 ± 10 °C).
• Pb free sol er will ten to splash when heate too high (about 1100 °F or 600 °C).
If you must use Pb sol er, please completely remove all of the Pb free sol er on the pins or sol er area before applying Pb sol
er. If this is not practical, be sure to heat the Pb free sol er until it melts, before applying Pb sol er.
• After applying PbF sol er to ouble layere boar s, please check the component si e for excess sol er which may flow onto the
opposite si e. (see figure below)
component component
remove all of the ^ 1П\
excess sol er
2.2. About lead free solder (PbF)
slice
\
sol er
Suggested Pb free solder
There are several kin s of Pb free sol er available for purchase. This pro uct uses Sn+Ag+Cu (tin, silver, copper) sol er. How
ever, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) sol er can also be use .
4

3 Service Navigation
3.1. Service Hint
Boar Name Function Boar Name Function
P Power Supply C1 Data Driver (Lower Right)
A DC-DC Converter
Speaker out, Soun Processor
AV Terminal, AV Switch
Digital Signal Processor, Micon, HDMI Interface
Peaks Lite 2p
C2 Data Driver (Lower Center)
C3 Data Driver (Lower Left)
SC Scan Drive
SU Scan out (Upper)
SD Scan out (Lower)
D Format Converter, Plasma AI, Sub-Fiel Processor SS Sustain Drive
K Remote receiver, Power LED SS2 Sustain connector
S Power Switch GH HDMI4 in
GS SD Car Slot G Front Terminal, Key Switch
GL SD Blue LED PA Fan control
HC PC in, Au io out
5

3.2. Applicable signals
COMPONENT (Y Pb, Pr), HDMI
* Mark: Applicable input signal
I Signal name COMPONENT HDMI I
525 (480) / 60i * *
525 (480) / 60d* *
625 (576) / 50i * *
625 (576) / 50p * *
750 (720) / 60d* *
750 (720) / 50d* *
1.125 (1.080) / 60i * *
1.125 (1.080) / 50i * *
1.125 (1.080)/6 0 d*
1.125 (1.0 8 0 )/5 0d*
1,125 (1,080) / 24p *
PC (D-sub 15P)
Signal name Horizontal frequency (kHz) Vertical frequency (Hz)
640 x 400 6)70 Hz 31.47 70.07
640 x 480 (®60 Hz 31.47 59.94
640 x 480 6)75 Hz 37.50 75.00
800 x 600 (®60 Hz 37.88 60.32
800 x 600 (®75 Hz 46.88 75.00
800 x 600 <©85 Hz 53.67 85.06
852 x 480 <©60 Hz 31.44 59.89
1.024 x 768 (®60 Hz 48.36 60.00
1.024 x 768 6)70 Hz 56.48 70.07
1.024 x 768 (®75 Hz 60.02 75.03
1.024 x 768 (®85 Hz 68.68 85.00
1.280 x 1,024 <©60 Hz 63.98 60.02
1.366 x 768 <®60 Hz 48.39 60.04
Macintosh13” (640 x 480) 35.00 66.67
Macintosh16” (832 x 624) 49.73 74.55
Macintosh21” (1,152 x 870) 68.68 75.06
( Note )
• Signals other than above may not be isplaye properly.
• The above signals are reformatte for optimal viewing on your isplay.
• Applicable input signal for PC is basically compatible to VESA stan ar timing.
• PC signal is magnifie or compresse for isplay, so that it may not be possible to show fine etail with sufficient
clarity.
6

4 Specifications
Power Source AC 220 - 240 V, 50/60 Hz
Power Consumption
Average use 495 W
Stan by con ition 0.4 W (Without monitor out recor ing)
20 W (With monitor out recor ing)
Plasma Display panel
Aspect Ratio 16:9
Visible screen size 127 cm ( iagonal)
1,106 mm (W) x 622 mm (H)
Number of pixels 2,073,600 (1,920 (W) x 1,080 (H)) [5,760 x 1,080 ots]
Soun Speaker Woofer (0 80mm) x 2pcs, Tweeter (23mm x 100mm) x 2pcs
Au io Output 31 W(15.5 W+ 15.5 W), 10%THD
Hea phones M3 (3.5 mm) stereo mini Jack x 1
PC signals VGA, SVGA, XGA
SXGA (compresse )
Horizontal scanning frequency 31 - 69 kHz
Vertical scanning frequency 59 - 86 Hz
Receiving Systems / Ban name PAL I : UHF E21-68
(B mo el) PAL 525/60 : Playback of NTSC tape from some PAL Vi eo recor ers (VCR)
or NTSC isc playback from DVD player an recor er.
DVB : Digital terrestrial services via UHF aerial input.
M.NTSC : Playback from M.NTSC Vi eo recor ers (VCR).
NTSC (AV input only) : Playback from NTSC Vi eo recor ers (VCR).
(E/P mo el) PAL B, G, H, I, SECAM B, G, SECAM L/L’ :
VHF E2 - E12 VHF H1 - H2 (ITALY)
VHF A - H (ITALY) UHF E21 - E69
CATV (S01 - S05) CATV S1 - S10 (M1 - M10)
CATV S11 - S20 (U1 - U10) CATV S21 - S41 (Hyperban )
PAL D, K, SECAM D, K :
VHF R1 - R2 VHF R3 - R5
VHF R6 - R12 UHF E21 -E69
PAL 520/60 : Playback of NTSC tape from some PAL Vi eo recor ers (VCR)
DVB : Digital terrestrial services via VHF / UHF aerial input.
M.NTSC : Playback from M. NTSC Vi eo recor ers (VCR)
NTSC (AV input only) : Playback from NTSC Vi eo recor ers (VCR)
TV signals may not be receive in some areas.
Aerial - Rear UHF (B mo el), VHF/UHF (E/P mo el)
Operating Con itions Temperature: 0 °C - 35°C
Humi ity: 20 % - 80 % RH (non-con ensing)
Connection Terminals
AV1 (Scart terminal) 21 Pin terminal (Au io/Vi eo in, Au io/Vi eo out, RGB in, Q-Link)
AV2 (Scart terminal) 21 Pin terminal (Au io/Vi eo in, Au io/Vi eo out, RGB in, S-Vi eo in, Q-Link)
AV3 VIDEO RCA PIN Type x 1 1.0 V [p-p] (75 Q)
S-VIDEO Mini DIN 4-pin Y:1.0 V [p-p] (75 Q) C:0.286 V [p-p] (75 Q)
AUDIO L - R RCA PIN Type x 2 0.5 V [rms]
COMPONENT
VIDEO Y 1.0 V [p-p] (inclu ing synchronization)
Pb, Pr± 0.35 V [p-p]
AUDIO L - R RCA PIN Type x 2 0.5 V [rms]
Others
HDMI1 / 2 / 3 / 4 TYPE A Connectors This TV supports “HDAVI Control 3” function.
PC HIGH-DENSITY D-SUB 15PIN R, G, B/ 0.7 V [p-p] (75 Q)
HD, VD/TTL Level 2.0 - 5.0 V [p-p] (high impe ance)
Car slot SD Car slot x 1
Output
AUDIO L - R RCA PIN Type x 2 0.5 V [rms] (high impe ance)
DIGITAL AUDIO OUT PCM / Dolby Digital, Fiber optic
Dimensions (W x H x D) 1,267 mm x 847 mm x 387 mm (With Pe estal)
1,267 mm x 794 mm x 104 mm (TV only)
Mass 46.0 kg Net (With Pe estal)
41.0 kg Net (TV only)
7

Note
• Design an Specifications are subject to change without notice. Mass an Dimensions shown are approximate.
• This equipment complies with the EMC stan ar s liste below.
EN55013, EN61000-3-2, EN61000-3-3, EN55020, EN55022, EN55024.
8

5 Service Mode
5.1. How to enter into Service Mode
While pressing [VOLUME ( - )] button of the main unit, press [0] button of the remote control three times within 2 secon s.
Software version ■ 1
Picture a justment -----------
White balance a justment
Option setting -------------------
Agig ----------------------------------
Service tool
SERVICE
ADJUST
WB-ADJ
OPTION
AGING
SRV-TOOL
Peaks SOFT 0.171 OPTION 1 2c
Peaks EEP 00.30.0797 OPTION 2 00
LSI DATA 0.00.00 OPTION 3 00
STBY SOFT 1.01.00 Mo el ID 05
STBY EEP 1.00.00 02001100
STBY ROMCOR 0.00.00 00000020
PDP SOFT 01.06 RB Cnt 003
PDP EEP 40.06 Time 00008:00
PDP FPGA 10.10 0000050
PDP PDROM 40.06
Press
[1]
Button
I Sub Item
| 1
Ia d ju s t " i '
'CONTRAST i '00 00i
YMAX
5.1.1. Key command
[1] button...Main items Selection in forwar irection
[2] button...Main items Selection in reverse irection
[3] button...Sub items Selection in forwar irection
[4] button...Sub items Selection in reverse irection
[RED] button...All Sub items Selection in forwar irection
[GREEN] button...All Sub items Selection in reverse irection
[VOL] button...Value of sub items change in forwar irection ( + ), in reverse irection ( - )
9

5.1.2. Contents of adjustment mode
• Value is shown as a hexa ecimal number.
• Preset value iffers epen ing on mo els.
• After entering the a justment mo e, take note of the value in each item before starting a justment.
Main item Sub item Sam ple data Rem ark
AD JUST C O NTRAST 000
CO LO R 2B
TIN T 00
Video- ain2 0
SUB-BRT 800
H-POS 0
H-AMP 0
V-POS 0
V-AMP 0
WB-ADJ R-CUT 80
-CUT 80
B-CUT 80
R-DRV CC
-DRV FC
B-DRV BC
ALL-CUT 80
ALL-D RV FC
OPTIO N Panel-Type 50FHD Factory
Boot ROM Preset
ST BY-SE T 00
EM E R E NCY ON
Y/C Delay
O PT 1 000101100
O PT 2 00000000
O P T 3 00000000
A IN R BW
All white (C OUNTER)
All white
All red
All green
All blue
ON/O FF
Diagonal lamp W
Diagonal lamp R
Diagonal lamp
Diagonal lamp В
1% W IN DO W
CO LO R BAR
A В zone/checkerd 4 trio
SC ROLL BAR
2dot width border
SR V-TO O L see next
Destinations E В P
Conti. Digital UK Conti. Analog
OPTION 1 ОС ОС ОС
O PT IO N2 00 00 00
O PT IO N3 00 00 00
5.1.3. How to exit
Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.
10

5.2. Service tool mode
5.2.1. How to access
1. Select [SRV-TOOL] in Service Mo e.
2. Press [OK] button on the remote control.
Display of TD2Microco e version —
Display of Flash ROM maker co e -
Display of SOS History ----------------
SRV-TOOL
TD2Microco e:81 cOOOOe
Flash ROM : 1 - 227E
PTCT : 00 . 00 . 00 . 00 . 00 Time 00000:40 Count 0000022 . POWER ON TIME/COUNT
Press [MUTE] button (3sec)
5.2.2. Display of SOS History
SOS History (Number of LED blinking) in ication.
From left si e; Last SOS, before Last, three occurrence before, 2n occurrence after shipment, 1 st occurrence after shipment.
This in ication except 2n an 1st occurrence after shipment will be cleare by [Self-check in ication an force to factory ship
ment setting].
5.2.3. POWER ON TIME/COUNT
To isplay TIME/COUNT menu, highlight position, then press MUTE for 3sec.
Time : Cumulative power on time, in icate hour : minute by ecimal
Count : Number of ON times by ecimal
Note : This in ication will not be cleare by either of the self-check or any comman .
5.2.4. Exit
1. Disconnect the AC cor from wall outlet or switch off the power with the [POWER] button on the main unit.
11

5.3. Hotel mode
1. Purpose
Restrict a function for hotels.
Access comman to the Hotel mo e setup menu
In or er to isplay the Hotel mo e setup menu, please
enter the following comman (within 2 second).
[TV] : Vol. [Down] + [REMOTE] : AV (3 times)
Then, the Hotel mo e setup menu is isplaye .
Hotel Mo e
Hotel Mo e 1 Off
____________________ |
Initial INPUT 1 Off 1
Intial POS 1 Off 1
Intial VOL Level Гот |
Maximum Vol Level 1 63 |
Button Lock Гот |
Remote Lock ГШ |
Select
^o E X IT
6 он- Change
~°RETURN
2. To exit the Hotel mo e setup menu
Disconnect AC power cor from wall outlet or switch off
the power with the [POWER] button on the main unit.
3. Explain the Hotel mo e setup menu
item Function
Hotel Mo e Select hotel mo e ON/OFF
Initial INPUT Select input signal mo es.
Set the input, when each time power is switche
on.
Selection :
Off/Analogue/DVB/AV1/AV2/AV2S/AV3/AV3S/
COMPONENT/PC/HDMI1/HDMI2/HDMI3/HDMI4
• Off: give priority to a last memory. However,
Euro mo el is compulsorily set to TV.
• AVnS/AVnC: only Euro mo el selectable
• PC: selectable with VGA option
Initial POS Select programme number.
Selection :
Off/0 to 99
• Off: give priority to a last memory
Initial VOL level A just the volume when each time power is
switche on.
Selection/Range :
Off/0 to 63
• Off: give priority to a last memory
Maximum VOL
level A just maximum volume. Range :
0 to 63
Button lock Select local key con itions.
Selection :
Off/SETUP/MENU/All
• Off: altogether vali
• SETUP: only F-key is invali
(Tuning gui e(menu) can not be selecte .)
• MENU: only F-key is invali
(only Volume/Mute can be selecte .)
• ALL: altogether invali .
Remote lock Select remote control key con itions.
Selection :
Off/SETUP/MENU
• Off: altogether vali
• SETUP: only Setup menu is invali
• MENU: Picture/Soun /Setup menu are invali
12

6 Troubleshooting uide
Use the self-check function to test the unit.
1. Checking the IIC bus lines
2. Power LED Blinking timing
6.1. Check of the IIC bus lines
6.1.1. How to access
Self-check in ication only:
Pro uce TV reception screen, an while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control
for more than 3 secon s.
Self-check in ication an force to factory shipment setting:
Pro uce TV reception screen, an while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote con
trol for more than 3 secon s.
6.1.2. Screen display
50FHD Panasonic 2008PDP
SE T SELF C HEC K C OM PLETE
PEAK S-SO FT 0.171
PE AKS-EEP 00.30.0797
E NX-SOFT 1.01.00
ENX -E EP 1.00.00
E N X-R O M C O R 0.00.00
PD P-MCU 01.06
PD P-EEP 40.06
PD P-FP A 10.10
PD P-PD 2-M 40.06
SD FLASH 5.65
ADV OK
ADAV OK
TU N OK
EN X OK
MEN1 OK
MEN2 OK
VS W OK
ASW OK
C3FS OK
PDP-PANEL OK
OFDM OK
TEM P OK
FRC OK
C6 OK
MIH O OK
VIF OK
CIM AX OK
USB OK
5SS B/E ONLY
SUM 1f40
OPTIO N 1 2c
OPTIO N 2 00
OPTIO N 3 00
Check 2c
Model ID 05
02012100
00000020
EDID1 fc.2b
ED ID2 fc.1b
6.1.3. Check Point
Confirm the following parts if NG was isplaye .
Display Ref. No. Description P.C.B.
A DV IC 451 0 A D/H D M I A-B oard
AD AV IC2106 Sound Processor A-Board
TU N TU8301 Tuner A-Board
ENX IC1100 enX (STB MCU) A-Board
MEM1 IC1101 EEPROM ( enX) A-Board
MEM 2 IC8601 EEPRO M (Peaks) A-Board
VS W IC3007 Video Switch A-Board
AS W IC3009 Audio Switch A-Board
C3FS IC4001 lobal core 3 sub A-Board
PD P-PA NEL IC9003 M ICOM D-Board
OFDM IC8301 Digital demodulator A-Board
TE M P IC4800 Tem p Sensor A-Board
FRC IC2604 Frame rate coverter A-Board
C6 IC5100 lobal core 6 A-Board
M IH O IC 4200 M IH O A-B oard
VIF TU 8301 Tuner A-Board
C IM A X IC 8402 C IM A X A-B oard
USB IC8620 USB A-Board
6.1.4. Exit
Disconnect the AC cor from wall outlet or switch off the power with the [POWER] button on the main unit.
13

6.2. Power LED Blinking timing chart
1. Subject
Information of LED Flashing timing chart.
2. Contents
When an abnormality has occurre the unit, the protection circuit operates an reset to the stan by mo e. At this time, the
efective block can be i entifie by the number of blinks of the Power LED on the front panel of the unit.
14

6.3. No Power
First check point
There are following 2 states of No Power in ication by power LED.
1. No lit
2. Re is lit then turns re blinking a few secon s later. (See 6.2.)
15

6.4. No Picture
No Picture
Check NG
16

6.5. Local screen failure
Plasma isplay may have local area failure on the screen. Fig-1 is the possible efect P.C.B. for each local area.
> SD boar
C1 boar \
D boar \
C2 boar
D boar C3 boar D boar
Panel (Thin vertical line)
<Local screen failure chart>
Fig-1
SC boar
>- SS boar
SS2 boar
D boar
17

7 Disassembly and Assembly Instructions
7.1. Remove the Rear cover
1. See Service Hint (Section 3)
7.2. Remove the Fan unit
1. Unlock the cable clampers to free the cable.
2. Remove the screws (x3 ^ ) .
3. Remove the relay connectors an remove the Fan unit.
Fan unit
Relay connector
4. Remove the screw (x1 on the back si e.
5. Remove the Fan.
Fan
Fan unit back si e
7.3. Remove the PA-Board
1. Unlock the cable clampers to free the cable.
2. Remove the screws (x2 ^ ) .
3. Disconnect the connectors (PA5, PA6, PA8, РАЗЗ, PA35,
PA36 an PA37)
4. Remove the PA-Boar .
PA33 PA-Boar PA35 PA37
PA8 PA36 PA6
7.4. Remove the P(AC)-Board
Caution:
To remove PC.B. wait 1 minute after power was off for is
charge from electrolysis capacitors.
1. Unlock the cable clampers to free the cable.
2. Disconnect the connectors (P9, P51, P53 an P55).
3. Remove the screws (x6 an remove the P(AC)-
Boar .
P (AC)-Boar
18

Caution:
To remove P.C.B. wait 1 minute after power was off for is
charge from electrolysis capacitors.
1. Unlock the cable clampers to free the cable.
2. Disconnect the couplers (P2, P6, P7, P11, P12, P25, P52,
P54 an P56).
3. Remove the screws (x6 an remove the P(MAIN)-
Boar unit.
7.5. Remove the P(MAIN)-Board 7. Remove the P(MAIN)-Boar .
P54 P52
4. Remove the screws (x25 on the back si e.
Note:
When assembling the P-Boar , the position of each hole of
the insulation sheets (A an B) is set to the position of each
hole of the P-Boar , then assemble them. marks in i
cate setting positions.)
5. Remove the screws (x6 ^ ) .
6. Remove the mol ing props (x9 O ) .
19

7.6. Remove the Rear Terminal
cover
1. Remove the screws (x3 x3 cz|>, x2 >=►).
2. Remove the Rear Terminal cover.
7.7. Remove the tuner unit
1. Unlock the cable clampers to free the cable.
2. Disconnect the connectors (A1, A3, A5, A6, A7, A8, A9,
A11, A51, A53, H11 an H12).
3. Remove the screws (x4 an remove the tuner unit.
1. Remove the tuner unit. (See section 7.7.)
2. Remove the tab an remove the CI cover.
7.8. Remove the A-Board
3. Remove the bri ge connector (A12, A13 an A14).
4. Remove the screws (x8 an remove the A-Boar .
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