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KV-HR29M61/HR29N90/HR34M61/HR34N90
RM-1007
RM-1011
RM-1007
RM-1011
SECTION 5
SAFETY RELATED ADJUSTMENTS
5-2. HV REGULATION CIRCUIT ADJUSTMENT
When replacing the f
ollowing components marked with
on the
schematic diagram always check HV regulation, and if neces-
sary re-adjust.
: RV8002
: IC8004, IC8005,
R8014, R8015, R8017
PH8003
T8001 (FBT)
D board
1. Connect a HV static voltmeter to the unconnected plug of the high-
voltage block.
2. Power on the set.
3. Receive the dot signal.
4. Set PIC MIN/BRT MIN.
5. Confirm that the static voltmeter reading is 31.5
±
0.3kVDC.
6. If not, adjust with RV8002 to the specified value.
5-3. HV PROTECTOR CIRCUIT CHECK
When replacing the following components marked with
on
the schematic diagram always check hold-down voltage.
: RV8002
: D8014
IC8001
R8016, R8019, R8046, R8052, R8072,
R8078, R8079, R8165
T8001 (FBT)
D board
1. Connect a HV static voltmeter to the unconnected plug of the high-
voltage block.
2. Power on the set.
3. Receive the dot signal.
4. Set PIC MIN/BRT MIN.
5. The set turns off (the protector circuit activates) at the 36.6kVDC
or less reading on the static voltmeter.
6. After that, adjust the item 5-2 (Return to 31.5kVDC).
[ D BOARD]
5-1. +B MAX VOLTAGE CONFIRMATION
1. Supply 242
±
VAC (GE model) or 121
±
VAC (Taiwan
model) to variable autotransformer.
2. Receive dot signal pattern and set the PICTURE and
BRIGHTNESS settings to their minimum.
3. Confirm the voltage between the both sides of C6512 on D
board is 137.0 V dc.
5-4. IK PROTECTOR CIRCUIT CHECK (D BOARD)
When replacing the following components marked with / on the
schematic diagram, always check IK protector circuit.
:
D8004
IC8001
Q8007
R8027, R8030, R8035,R8037
R8038, R8039, R8040, R8041, R8043,
D board
1. Unsolder T8001 (FBT) Pin 1 and connect a DC current meter
between Pin 1 and the pattern.
2. Remove R0494 (MG MOUNT).
3. Feed the all white signal, increase the picture and brightness
slowly and check the hold-down works when the reading on
the DC current meter is 2670uA.
4. Turn power off.
5. Remove the DC current meter and set R0494 solder the
unsolder portions.
2
0
2
0
Содержание TRINITRON KV-HR29M61
Страница 104: ...KV HR29M61 HR29N90 HR34M61 HR34N90 RM 1007 RM 1011 RM 1007 RM 1011 146 145 SF LANDING SF BOARD A Side SF BOARD B Side ...
Страница 105: ...KV HR29M61 HR29N90 HR34M61 HR34N90 RM 1007 RM 1011 RM 1007 RM 1011 147 148 T TELE TEXT T BOARD A Side T BOARD B Side ...
Страница 108: ... 153 KV HR29M61 HR29N90 HR34M61 HR34N90 RM 1007 RM 1011 RM 1007 RM 1011 W VM W BOARD ...