RX7Club.com - Mazda RX7 Forum
IC5 P/N:
IC5 P/N:
0 2017/03/16 12:42:40
IC1 P/N*: (made by Motorola) 74HC14A 343BW
IC1 P/N*: (made by Motorola) 74HC14A 343BW
0 2017/03/16 12:42:38
IC6 P/N: AN8363UBK Japan 41.2
IC6 P/N: AN8363UBK Japan 41.2
0 2017/03/16 12:42:36
Another general shot of the board with IC6.
Another general shot of the board with IC6.
0 2017/03/16 12:42:35
IC6 and the HUGE Zener diode, ZD6.
IC6 and the HUGE Zener diode, ZD6.
0 2017/03/16 12:42:33
IC3 & IC5 on display.
IC3 & IC5 on display.
0 2017/03/16 12:42:31
General view of circuit board with IC1. Note that C3 was replaced, aka the blue Panasonic capacitor.
General view of circuit board with IC1. Note that C3 was replaced, aka the blue Panasonic capacitor.
0 2017/03/16 12:42:30
General view of circuit board with speedometer removed.
General view of circuit board with speedometer removed.
0 2017/03/16 12:42:28
Top 1/3 of the circuit board backside.
Top 1/3 of the circuit board backside.
0 2017/03/16 12:42:27
Middle 1/3 of the circuit board backside.
Middle 1/3 of the circuit board backside.
0 2017/03/16 12:42:25
Lower 1/3 of the circuit board backside. Note the surface mounted components.
Lower 1/3 of the circuit board backside. Note the surface mounted components.
0 2017/03/16 12:42:23
Good view of VR, the adjustment screw to calibrate the speedometer.
Good view of VR, the adjustment screw to calibrate the speedometer.
0 2017/03/16 12:42:22
R10 is a 200Ω resistor and diode D4
R10 is a 200Ω resistor and diode D4
0 2017/03/16 12:42:17
Speedometer Face + Circuit Board
Speedometer Face + Circuit Board
0 2017/03/16 12:40:40
Front windscreen with defrost vent visible.
Front windscreen with defrost vent visible.
0 2016/09/07 14:53:22
Another greyish and flattened solder joint on bottom right.
Another greyish and flattened solder joint on bottom right.
0 2016/09/05 21:13:21
Greyish and flattened solder joint on the bottom right.
Greyish and flattened solder joint on the bottom right.
0 2016/09/05 21:13:20
Suspect solder joints. The 2nd from top joint is not supposed to be connected to anything.
Suspect solder joints. The 2nd from top joint is not supposed to be connected to anything.
0 2016/09/05 21:13:19
Conformal coating masks the part number on this 42-pin IC
Conformal coating masks the part number on this 42-pin IC
0 2016/08/26 18:33:51
Top Down
Top Down
0 2016/08/20 20:47:55
Top Up
Top Up
0 2016/08/20 20:47:54
0 2016/08/20 19:26:41
Close-up of the missing eyelets. Two of them were removed during desoldering.
Close-up of the missing eyelets. Two of them were removed during desoldering.
0 2016/08/02 07:15:43
Backside view of the CPU board. Notice the missing eyelets?
Backside view of the CPU board. Notice the missing eyelets?
0 2016/08/02 07:15:42
Eyelet damage
Eyelet damage
0 2016/08/02 07:15:41
Close-up of burned up solder runs. Note the trace that runs from underneath the IC chip to the right lead of Q1 is nearly gone.
Close-up of burned up solder runs. Note the trace that runs from underneath the IC chip to the right lead of Q1 is nearly gone.
0 2016/08/02 07:15:40
Note the broken solder runs between Q1 and ZD3.
Note the broken solder runs between Q1 and ZD3.
0 2016/08/02 07:15:39
Lifted eyelets on Q1, backside of the board.
Lifted eyelets on Q1, backside of the board.
0 2016/08/02 04:55:58
Broken run to ZD3 and damaged eyelet to ZD3.
Broken run to ZD3 and damaged eyelet to ZD3.
0 2016/08/02 04:55:55
In depth view of solder run damage. Note the missing run at the top center.
In depth view of solder run damage. Note the missing run at the top center.
0 2016/08/02 04:55:54
Closer view of solder run damage to Q1 and lifted eyelets.
Closer view of solder run damage to Q1 and lifted eyelets.
0 2016/08/02 04:55:53
Damage to board, eyelets lifted on Q1, and broken solder runs. A run is lifted under the IC chip that is supposed to extend to the lead (on left) of the transistor Q1.
Damage to board, eyelets lifted on Q1, and broken solder runs. A run is lifted under the IC chip that is supposed to extend to the lead (on left) of the transistor Q1.
0 2016/08/02 04:55:10
Odometer lives again!
Odometer lives again!
0 2016/04/13 19:21:13
Here is 22yrs of old flux on the solder cups of the odometer display.
Here is 22yrs of old flux on the solder cups of the odometer display.
0 2016/04/12 22:38:00
The 1,000uF capacitor leakage within the red circle.
The 1,000uF capacitor leakage within the red circle.
0 2016/04/12 22:37:18
Back side of odometer display solder joints. This turned out to be 22yr old solder flux.
Back side of odometer display solder joints. This turned out to be 22yr old solder flux.
0 2016/04/12 22:18:37
1,000uF Capacitor leakage within red circle.
1,000uF Capacitor leakage within red circle.
0 2016/04/12 22:17:41
IMG 1368
IMG 1368
0 2010/03/19 18:38:52
IMG 1373
IMG 1373
0 2010/03/19 18:38:52
IMG 1358
IMG 1358
0 2010/03/19 18:38:52