Safety Related Adjustments; B Max Voltage Confirmation; Hv Regulation Circuit Adjustment; Hv Prortector Circuit Check - Sony TRINITRON KV-HR29M61 Service Manual

KV-HR29M61/HR29N90/HR34M61/HR34N90
RM-1007
[ D BOARD]

5-1. +B MAX VOLTAGE CONFIRMATION

2
1. Supply 242 ± VAC (GE model) or 121 ± VAC (Taiwan
0
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.

5-2. 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).
RM-1011 RM-1007
SECTION 5

SAFETY RELATED ADJUSTMENTS

2
0
on the
RM-1011

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.
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