Safety Related Adjustments - Sony TRINITRON KV-HR36M91 Service Manual

KV-HR36M61/HR36M91
RM-1007 RM-1007
[ D BOARD]
5-1. +B MAX VOLTAGE CONFIRMATION
1. Supply 242 ± VAC to variable autotransformer.
2
0
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 or less.
5-2. HV REGULATION CIRCUIT ADJUSTMENT
ollowing components marked with
When replacing the f
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
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).
SECTION 5

SAFETY RELATED ADJUSTMENTS

on the
on
– 56 –
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.