NOTE:
Diode tests are conducted with the PWB disconnected.
P121
3.3V in on
Pins 10~11
Va in on
Pins 47~50
3.3V out
On Pins
12, 5~6
Va out
on
Pins 1~4
P101
P102
P103
P104
P105
P301
P304
P305
P201
P202
P203
P204
P205
P206
X-Board Right
X-Board Center
P121
Auto Gen
P161
P162
D201
CONTROL PCB
P131
IC221
IC231
X101
25 Meg
Pin 1 (5V)
Pin 2 (1.8V)
Pin 3 (Gnd)
IC211
Pin 1 (Gnd)
Pin 2 (3.3V)
Pin 3 (4.95V)
P101
P111
IC241
IC201
2
FL111
FL112
P811
VS Adj
VA Adj
P813
SMPS Test – Unplug P813, ground pin 24.
If all supplies do not run when A/C is
reapplied, disconnect P811 to isolate the
excessive load. Use two (100W) light bulbs
in series connected between Vs and Gnd to
test under a load.
Y-SUSTAIN
Waveform TP
On Y-Drive PWB
SMPS
POWER
SUPPLY
To
Ft IR
J1
IR J2 goe
s to
Keys P101
To
Speakers
(All Pins
8.5V)
A/C IN
Short across the two points labeled
Auto Gen to generate a test pattern.
(Note: Must Remove LVDS Cable).
* If the complaint is no video and shorting
the points (AutoGen) causes video to appear
suspect the Main board or LVDS cable.
With the unit on, if D201 does not blink
on/off, check 5V supply.
If present replace the Control PCB.
If missing, see (To Test Control Board)
Software
Upgrades n/c
SC101
R901
R502
To Test Control board: Unplug all
connectors. Jump 5V from SMPS
(P813 pin 23) to pin 1 of IC211.
Observe LED. If it blinks, most likely
Control PWB is OK. FL111 and FL112
should be checked.
To check M5V route, disconnect P201
from the Y-SUS Board and connect a
Jumper from Pin 1 of P811 (M5V) to
Pin 10 P201 (5V).
The 5V is then routed to the Control
Board via FS201, Ribbon Cable P101
on the Y-SUS to P111 and FL111 and
FL112 on the Control Board for Control
Board operation verification. Watch
D201 for blinking to confirm.
Grayed Out ICs are located on Back
50PQ30 (50G2 Panel) CIRCUIT INTERCONNECT DIAGRAM
50PQ30 (50G2 Panel) CIRCUIT INTERCONNECT DIAGRAM
FL111 FL112
5V Fuses
To Check FG5V to the Y Drive, measure
across capacitor C205
The voltage is supplied thru FL201.
All Y-Drive voltages measured from FGnd.
Label
STBY Run No
Load
17V
0V
17V
17V
Gnd
Gnd
Gnd
Gnd
12V
0V
12V
12V
Gnd
Gnd
Gnd
Gnd
5V
5V
5V
5V
Stby 5V
5V
5V
5V
13, 14
Gnd
Gnd
Gnd
15, 16
Gnd
Gnd
Gnd/nc
5V Det
0V
4.8V
5V
AC Det
4.6V 4.5V
5V
RL On
0V
3.3V
0V
Vs On
0V
3.3V
0V
0V
3.3V
0V
0V
0V
5V
P813
Pin 1 (Gnd)
Pin 2 (3.3V)
Pin 3 (4.95V)
IC221
LVDS
Pin
1, 2
3, 4
5, 6
7, 8
9~11
12
13, 14
15, 16
17
18
19
20
21
22
Stby5V
5V
5.1V
5V
Key On
0V
5.1V
5V
23
24
Auto Gnd
M5 On
FPC
F
PC
15V and 5V
FPC
FPC
FPC
FPC
FPC
Z-SUS
Signal
R
ibb
on Cab
le
R
ibb
on Cab
le
LVDS
Va
P122
17V
3.3V
X-Drive RGB
Signals
Z-Drive Signals
Note: IC221 (3.3V Regulator) routed
out P162 (56~60) to Center X Board
400us
220Vp/p
39V (AC) rms
To Z-SUB
P301
Connect Scope between Waveform TP on Z board and Gnd
Use RMS information just to check for board activity.
Main Power SW Out
Stand-By 5V shuts off
0V
1
TUNER
SIF 16
19 Video
(5V) 4
DIF + 12
DIF - 13
(5V) 15
D502
IC302
IC503
9V Reg
X1
X501
IC1001
P1006
P1003
LVDS
P1001
P1005
IC1
IC504
HDMI
USB
IC805
A=5V
A=0V
K=4.7V
D303
Q1002
Q303
IC203
D805
D804
Q801
K
A
ZD601
IC202
IC304
IC201
2
1
3
2
B
C
E
B
C
E
Q891
Q503
C
A
D1001
Q302
Q1001
IC601
A
K
A
D802
IC803
IC802
Q892
A
K
A
D628
Q601
D627
A
K
A
B
C
E
Q890
B
C
E
B
C
E
IC602
A
K
A
Q502
B
C
E
IC204
IC301
Q301
G
D
S
B
C
E
1
3
2
B
C
E
B
C
E
D633
3
2
1
4
1) 5.1V
2) Gnd
5) 0V
6) 5.1V
3) 3.2V
4) 0V
IC804 USB
D806
A
K
A
A
K
A
B
C
E
C
A
A-C
8V
5V Reg
Analog
S (0V)
G (3.3V)
D (3.3V)
S (3.3V)
G (0V)
D (3.3V)
Q504
Digital
1
2
3.3V
3
5V
1.85V
3.3V
0.6V
In
Out
Gnd
8V
Reg
9V Reg
12V
Gnd
Gnd
5.0V
3.8V
IC301 IC304
IC502
IC503
IC505
1.8VMST
Reg
3.3VST
On = Digital CH
1.2VPVSB Reg
0V/3.3V
0V/1.2V
IC502
Q504
Q501
C
B E
Gnd
Out
In
Out
D
G S
3
IC505
Audio
Amp
L1013
L1012
SW301
Reset IC1
12Mhz
25Mhz
L318
IC804
P206
VR401
SET-DN
VR601
SET-UP
P209
P205
P202
FS501 (17V)
125V/4A
VR502
-Vy
+
-
VSC TP
R202
P208
P207
+
-Vy TP
R201
-
FS202
4A/250V
P201
VR501
VSC
C214
C213
IC503
IC502
IC303
T502
T501
FS201
10A/125V
D502
D503
D501
Q503
FS201
10A/125V
M5V
17V
Va
Fl
oa
tin
g
Gn
d
Floa
tin
g G
nd
Fl
oa
tin
g
Gn
d
Fl
oa
tin
g
Gn
d
P
10
7
P
10
9
P
10
6
P2
01
P
202
P2
03
Y-Drive
Lower
P10
1
P1
02
P
103
Y-Drive
Upper
P108
P209
C105
+
-
C205
+
-
FL201
FG5V
P208
P206
P109
P106
P10
7
12) Vscan (134V)
11) VScan (134V)
10) n/c
9) FG5V (5V)
8) FG5V (5V)
7) FGnd
6) Clk (0.9V)
5) STB (2.3V)
4) OC1 (2.2V)
3) DATA (0V)
2) OC2 (2.9V)
1) FGnd
12
) FG
nd
11
) O
C
2
1
0)
DATA
9)
OC1
8)
STB
7)
C
lk
6) FGnd
5)
FG 5
V
4)
FG 5
V
3) FGnd
2) FGnd
1) FGnd
Y-DRIVE WAVEFORM
0V
A
B
V Set-Up (Ramp)
Connect Scope between Waveform TP on Y-Drive and Gnd
Use RMS information just to check for board activity.
VR601
V Set-
Down
P101
P100
Z-SUS PWB
VZB Adj
VR200
P101
FS102
250V/4A
Vs fuse
J125
J27
FS100
FS100
125V/10A
(M5V)
L200
P103
P105
P104
Z Bias
Waveform
1~2) +5V (5.1V)
3~6) Gnd
7) n/c
8~9) ER_COM (90)
10) n/c
11~12) +Vs
P101
VZB TP Top Side
R271 or R272 To J125
FS101
125V/4A
(15V)
3
1 2
2
IC305
P209
6) FGnd
5) FGnd
4) FGnd
3) n/c
2) VScan
1) VScan
1) FGnd
2) FGnd
3) FGnd
4) n/c
5) VScan
6) VScan
P209
P108
Note: Test points
are not identified
on the board.
Just above P108
Just below P109
Micro/Video
Processor
LVDS
Processor
TUNER TU501
TDVW-H103F
MAIN BOARD
3.0V
Gnd
4.9V
IC305
Reg
3.3VMST
Tuner
5V Reg
2
2 1
Tuner
Tuner
VS to Z-SUS and Error Com from the Z-SUS
*Varies according to Panel Label
P201 Y-SUS
4mS
FG5V
+ side
C105
1~3) 17V
4~7) 5V
Vscan
(*134V)
From FG
Pin
Label
Run
1
2
3
4
5
6
0.3V
P100
7
0.4V
Z Enable
Z Ramp
8
1.7V
0.05V
1.8V
9
10
11
Gnd
17V
+15V
12
17V
+15V
0.8V
Gnd
Z Bias
Z ER Dn
Z ER Up
Z SUS Dn
Z SUS Up
Gnd
Gnd
Gnd
0.2V
Gnd
* (Vs) Variable
according to Panel
Label
Ribbon Cable
* (Vs) (Va) Varies
according to
Panel Label
5us
150us
-
+
+-
150V
5V
VR401
Va
3.3V
3.3V
Va
From Pin 2 IC221
(3.3V)
P162
Pins 56~60
80VAC rms
1) 5.4V
2) 4.95V
3) 1.3V
4) Gnd
IC302
1.3V VDDC REG
1) 5V
2) Gnd
3) 3.3V
5) 0.9V
6) 0.9V
7) 4.9V
8) 3.6V
IC602, IC802
1) 5V
2) 4.6V
3) 4.6V
4) 3.3V
5,6,7,8) Gnd
1,2) Gnd
3,4) Gnd
5,6) 3.29V
7) Gnd
8) 3.29V
IC201 NV RAM
IC202 HDCP
Main Back Side Regulators
Main Front Side Regulators
4) 0V
5) 0V
6) 5V
IC804 USB
POWER
1,2) Gnd
3) 3.29V
4) Gnd
5,6) 3.29V
7) Gnd
8) 3.3V
To run the Z-SUS without the
Y-SUS, jump VS from the
SMPS to pin 11 or 12 P101.
Jump M5V to pin 1 or 2 P101.
Jump Audio 17V from SMPS
to pin 11 or 12 of P100.
Jump M5V to the Control
Board.
P211
Va out on
Pins 1~4
P331
3.3V in
on Pins
38, 43, 44
3.3V out
Pins 39~40
P212
Va in
Pins 46~50
3.3V in on
Pins 1~5
516V P/P
Pin 1 (0.8V)
Pin 2 (Gnd)
Pin 3 (4.96V)
Pin 4 (5.74V)
Pin 8 (3.3V)
Pin 7 (Gnd)
Pin 6 (Gnd)
Pin 5 (4.91V)
IC241
Pin 1 (3.3V)
Pin 2 (0V)
Pin 3 (3.3V)
Pin 4 (Gnd)
Pin 5 (3.3V)
Pin 6 (0V)
Pin 7 (3.3V)
Pin 8 (0V)
IC141
Pin 1~3 (17V)
Pin 4~7 (M5V)
3.3V is not routed
through this connector
X-Drive RGB Signals
*Varies according to Panel Label
Pin Label
Run
1~3 Gnd
Gnd
4
n/c
n/c
5~7
P202 / P122
*Va
60V
30
X-Drive RGB Signals
P121
P212
P231
P232
P211
P331
Diode Check
Gnd
n/c
Open
*Vs
Gnd
M5V
nc
*Va
Gnd
Label
9,10
8
6-7
4-5
3
1~2
P811 SMPS
Pin
Open
Gnd
2V
nc
Open
Gnd
Diode
Diode Check
Open
Diode Check
1.33V
Diode Check
0.79V (In Circuit)
1.2V (No Connectors)
Diode Check
Open
(In Circuit)
Diode Check
1.354V
(In Circuit)
Diode Check
Open
(In Circuit)
Pin
Label
Run
1-2
Vs
*193V
3
nc
nc
Gnd
6-7
Va
*60V
8
Gnd
9,10
M5V
5.1V
Gnd
Gnd
0.86V
Open
Open
4-5
Gnd
Gnd
nc
Diode
Pin
Label
Run
1~2
Vs
*193V
3~6
n/c
8~9 ER_COM *90V
10
11~12
M5V
5.1V
Gnd
0.86V
Open
Open
7
Diode
Gnd
Gnd
n/c
n/c
n/c
n/c
n/c
P206 Y-SUS
17V turns on with
Vs On command
12V turns on with
RL On command
5V turns on with
RL On command
5V Det from SMPS when
5V (9~11) turns on
Step 1
Step 3
Step 2
P303
P302
X-Board Left
P2
05
P203
P204
400uS
FL101
FG5V
Y-SUS and Y Drive Signals
M5V
M5V
Gnd
Gnd
P1001
Pin Label STBY
1
2
3
Gnd
Gnd
0V
IR
Key 1
4.8V
Run
Gnd
3.3V
4.8V
4
0V
Key 2
3.3V
Pin Label
STBY
5
6
7
Gnd
Gnd
0V
*PKEY
EyeSCL
0V
Run
Gnd
3.3V
0V
8
0V
EyeSDA
3.3V
Pin Label
STBY
9
10
11
5VST
5V
0V
Gnd
3.3VST
Gnd
Run
5V
5V
Gnd
12
Gnd
Gnd
Gnd
Pin Label
STBY
13
14
15
LED W
0V
0V
LED R
PWM
3.23V
Run
3.23V
0V
0V
*PKEY (pin 5) Normal 0V.
If 5V Main Power Switch is
Open. STBY5V turns off.
Pin Label
Run
1
Gnd
Gnd
2
Gnd
Gnd
3, 4
P101 (Side Key) to J2 (Ft IR)
Key
3.3V
Gnd
Gnd
Open
Diode Check
