Specifications

P811
VS Adj
VA Adj
P121
Auto Gen
P161 P162
D201
P204
P205
P201
P202 P203
CONTROL PCB
P813
SMPS Test – Unplug P813 If all supplies do
not run when A/C is reapplied, disconnect
P811 to isolate the excessive load. This
supply will operate with no external load. For
a proper text, use two (100W) light bulbs in
series to test under a load.
Y-DRIVE WAVEFORM
VZB
VR8
P201
P101
Y-SUSTAIN
P202
P131
Waveform TP
On Y-Drive PWB
LEFT X DRIVE
RIGHT X DRIVE
SMPS PCB
POWER SUPPLY
To keys and IR
To
Speakers
A/C IN
Y-SUS Drive
Short across the two points labeled
Auto Gen to generate a test pattern.
If the complaint is no video and
shorting the points (AutoGen) causes
video to appear suspect the Digital PCB.
With the unit on. If D201
does not blink on/off. Check
5V supply. If present replace
the Control PCB
Z-SUS
Waveform
TP J27
P206
-VY TP
R201
VSC
TP
P206 P304
P305
P301
P302 P303
P306
P211
FS501 (17V)
125V 4A
FS203 (VA)
125V 10A
FS202
(VS)
250V 4A
VZB TP
Right Side
R49 or R50
To Chassis
Gnd
No
Connection
IC221
IC231
SC101
R901
R502
Unplug all connectors. Jump 5V from SMPS
(P813 pins 9~12) to pin 1 of IC211. Observe
LED. If it blinks, most likely Control PWB is OK.
FL111 and FL112 should be checked.
Grayed Out ICs are located on Back
X101
25 Meg
Glass
Fusable Links
VR501
VSC
VR502
-VY
VR601
SET-UP
42PQ30 CIRCUIT INTERCONNECT DIAGRAM
P3
P7
P6
Z-SUSTAIN
No IPMs
No IPMs
Va
TP
FL111 FL112
5V Fuses
Waveform
FL1
FL1
5V Fuse
Floating
Ground
+
-
To Check 5V to the Y Drive,
measure across capacitor C18.
The voltage is supplied thru FL1.
C18
Disconnect P201 from the Y SUS Board and
connect a Jumper from Pin 10 of P811 (M5V) to
Pin 10 P201 (5V). The 5V will be routed to the
Control Board via FS201, Ribbon Cable P101 on
the Y SUS Board and FL111 and FL112 on the
Control Board for Control Board operation
verification.
ROM
Updates
4mS
Label STBY Run No Load
17V 0V 17V 17V
Gnd Gnd Gnd Gnd
12V 0V 12V 12V
Gnd Gnd Gnd Gnd
9, 10 5V 5V 5V
11, 12 5V 5V 5V
13, 14 Gnd Gnd Gnd
15, 16 Gnd Gnd Gnd/nc
5V Det 0V 5V 5V
AC Det 4.6V 4.6V 5V
RL On
0V 3.73V 0V
Vs On 0V 3.2V 0V
0V 3.26V 0V
0V 0V 5V
P813
Pin 1 (4.95V)
Pin 2 (3.3V)
Pin 3 (0V)
Pin 1 (5V)
Pin 2 (1.8V)
Pin 3 (0V)
0V
160V
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
5us
185us
-
+
V Set-
Down
VR401
P205 P204 P203 P202 P201
VR401
SET-DN
R520
-
+
P203
+
-
Fusable
Link
FS201 (5V)
125V 4A
IC221
IC211
Pin 3 (0V)
Pin 2 (3.3V)
Pin 1 (4.95V)
P101
LVDS
Pin
1, 2
3, 4
5, 6
7, 8
9, 10
11, 12
13, 14
15, 16
17
18
19
20
21
22
Stby5V 5V 5V 5V
Key On 0V 0V 5V
23
24
Auto Gnd
M5 On
Vs (1,2)
Va (6,7)
M5 (9,10)
+
FPC FPC
15V and 5V
Ribbon Cable
FPCFPC
FPCFPCFPCFPC
Z-SUS
Signal
+
-
5V
*Varible according to Panel Label
Pin Label STBY Run
1 Gnd Gnd Gnd
2 Gnd Gnd Gnd
3
4
5
60V
60V
P202
Gnd Gnd Gnd
nc nc nc
7
0V
*Va 0V 60V
60V
*Va
*Va
Pin Label STBY Run
1
Vs
2
3
4
5
6
nc
P206
nc
Gnd
7
Gnd
*94.9V
nc
er com
8
0V
*94.9V
er com
0V
nc
Gnd
Gnd
Gnd
Gnd
0V
0V
nc
*193V
nc
Pin Label STBY Run
1 Vs 0V *193V
2Vs 0V
3nc nc nc
4 Gnd 0V 0V
5 Gnd 0V 0V
6 Va 0V *60V
7 Va 0V *60V
8 Gnd 0V 0V
9 M5V 0V 5V
10 M5V 0V 5V
*Variable according to Panel Label
P201 Y-SUS and P811 SMPS
*193V
Ribbon Cable Ribbon Cable
P2
P111
P206
LVDS
Pin Label STBY Run
1
2
3
4
5
6
0.8V
P2
7
1.9V
Z Enable
Z Ramp Dn
8
0V
0V
0.4V
1.9V
0V
0V
0.79V
0.13V
0.19V
9
10
4.9V
11
Gnd
16.9V
+5V
+15V
12
0V
16.9V
+15V
0V
0V
Gnd Gnd
Gnd Gnd Gnd
Z Bias
Z ER Dn
Z ER Up
Z SUS Dn
Z SUS Up
0V
0V
0V
Pin 11/12 (15V) and Pin 10 (5V)
P232 P331 P311
Va Va
P233
*Varible according to Panel Label
Pin Label STBY Run
1 Gnd Gnd Gnd
2 Gnd Gnd Gnd
3
4
5
P211 / P311
nc nc nc
*Va
*Va 0V 60V
0V 60V
TCP
TCP TCP TCP
TCP
TCP TCP TCP TCP TCP TCP TCP
P101
P208
P103
P205
P102
P207
P104
Vs
*193V
5V
17V
TU501
TUNER
IC302
IC503
MAIN PWB
SW301
IC203
IC201
IC204
IC504
IC805
X1
X501
IC505
IC502
IC202
IC201
IC304
IC305
IC803
IC802
IC601
IC602
P1006
P1002 LVDS
P1001
P1005
IC1
IC252
Pin 4 (3.3V)
Pin 3 (3.3V)
Pin 2 (0V)
Pin 1 (3.3V)
FL204
1V Fuse
IC201
3.3V 3.3V
Y-Drive Signals
X-Drive
Signals
Z-Drive Signals
Note: 3.3V for X boards originates
from IC221 on the Control board
Note: 3.3V for X boards originates
from IC221 on the Control board
Note: IC221 (3.3V Regulator)
routed out P161 / P162 to X-PWBs
Mstar
R49
R50
Scan 1,2Scan
5V FG 4,5
P203
P208
P205
All
Floating
Gnd
528V P/P100uS
50VAC rms
400us 200Vp/p41V (AC) rms
IC503
1) 12V
2) 0V
3) 8V
1) 5.4V
2) 5V
3) 1.3V
4) 0V
8V regulator
For IC505
Tuner B+
3.1V REG
IC805
1,2,3,4) 0V
5) 4.7V
6) 4.7V
7) 3.3V
8) 4.7V
EDID
5) 0.9V
6) 1.5V
7) 4.9V
8) 3.6V
IC302
IC305
1) 0V
2) 3.4V
3) 5.0V
IC304
1) 0.63V
2) 1.85V
3) 3.3V
IC602, IC802,
IC803
1,2,3,4) 0V
5) 4.6V
6) 4.6V
7) 3.3V
8) 4.6V
IC505
1) 8V
2) 0V
3) 3.78V
IC202
1,2) 0V
3,4) 0V
5, 6) 3.3V
7) 0V
8) 3.3V
IC502
1) 3.3V
2) 1.27V
3) 0V
IC201
1,2) 0V
3,4) 0V
5, 6) 3.3V
7) 0V
8) 3.3V
5V regulator
Tuner B+
1.2V VSB
3.3V MST
1.8V MST
NV RAM HDCP
Main Back Side RegulatorsMain Front Side Regulators
For Regulator
Voltages
See Chart
Connect Scope between Waveform TP on Z board and Gnd
Use RMS information just to check for board activity.